PATCH [1/4] C-SKY port: ELF and BFD support

Message ID 1f7efd89-29ea-a7b8-f5a2-ffb97cea3902@codesourcery.com
State Superseded
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Series
  • PATCH [1/4] C-SKY port: ELF and BFD support
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Commit Message

Sandra Loosemore May 23, 2018, 11:59 p.m.
Here's part 1 of the C-SKY port, covering the ELF and BFD support.

One technical note on this patch part:  the C-SKY port historically used 
the same value for EM_CSKY that was originally assigned to EM_MCORE 
(39), which caused various conflicts unless EM_MCORE was disabled. 
We've gotten a new official number assigned for EM_CSKY but continue to 
recognize objects using EM_MCORE for backward compatibility.  (Some 
other ports also have similar code to deal with old unofficial EM_xxx 
numbers.)

-Sandra

Patch

commit 0c943f71830bcfbce09db2deca35984ff23588ba
Author: Sandra Loosemore <sandra@codesourcery.com>
Date:   Mon May 21 13:40:20 2018 -0700

    C-SKY port: ELF and BFD support
    
    2018-05-21  Lifang Xia <lifang_xia@c-sky.com>
    	    Yunhai Shang  <yunhai_shang@c-sky.com>
    	    Wenmeng Zhang <wenmeng_zhang@c-sky.com>
    	    Wei Cheng <wei_cheng@c-sky.com>
    	    Linjie Yu <linjie_yu@c-sky.com>
    	    Sandra Loosemore <sandra@codesourcery.com>
    	    Chung-Lin Tang <cltang@codesourcery.com>
    
    	bfd/
    	* Makefile.am (ALL_MACHINES, ALL_MACHINES_CFILES): Add C-SKY.
    	(BFD32_BACKENDS, BFD_BACKENDS_CFILES): Likewise.
    	* Makefile.in: Regenerated.
    	* archures.c (enum bfd_architecture): Add bfd_arch_csky and
    	related bfd_mach defines.
    	(bfd_csky_arch): Declare.
    	(bfd_archures_list): Add C-SKY.
    	* bfd-in.h (elf32_csky_build_stubs): Declare.
    	(elf32_csky_size_stubs): Declare.
    	(elf32_csky_next_input_section: Declare.
    	(elf32_csky_setup_section_lists): Declare.
    	* bfd-in2.h: Regenerated.
    	* config.bfd: Add C-SKY.
    	* configure.ac: Likewise.
    	* configure: Regenerated.
    	* cpu-csky.c: New file.
    	* elf-bfd.h (enum elf_target_id): Add C-SKY.
    	* elf32-csky.c: New file.
    	* libbfd.h: Regenerated.
    	* reloc.c: Add C-SKY relocations.
    	* targets.c (csky_elf32_be_vec, csky_elf32_le_vec): Declare.
    	(_bfd_target_vector): Add C-SKY target vector entries.
    
    	binutils/
    	* readelf.c: Include elf/csky.h.
    	(guess_is_rela): Handle EM_CSKY.
    	(dump_relocations): Likewise.
    	(get_machine_name): Likewise.
    	(is_32bit_abs_reloc): Likewise.
    
    	include/
    	* elf/common.h (EM_CSKY, EM_CSKY_OLD): Define.
    	* elf/csky.h: New file.

diff --git a/bfd/Makefile.am b/bfd/Makefile.am
index 8374bbd..ea9ff15 100644
--- a/bfd/Makefile.am
+++ b/bfd/Makefile.am
@@ -99,6 +99,7 @@  ALL_MACHINES = \
 	cpu-cr16c.lo \
 	cpu-cris.lo \
 	cpu-crx.lo \
+	cpu-csky.lo \
 	cpu-d10v.lo \
 	cpu-d30v.lo \
 	cpu-dlx.lo \
@@ -184,6 +185,7 @@  ALL_MACHINES_CFILES = \
 	cpu-cr16c.c \
 	cpu-cris.c \
 	cpu-crx.c \
+	cpu-csky.c \
 	cpu-d10v.c \
 	cpu-d30v.c \
 	cpu-dlx.c \
@@ -303,6 +305,7 @@  BFD32_BACKENDS = \
 	elf32-cr16c.lo \
 	elf32-cris.lo \
 	elf32-crx.lo \
+	elf32-csky.lo \
 	elf32-d10v.lo \
 	elf32-d30v.lo \
 	elf32-dlx.lo \
@@ -440,6 +443,7 @@  BFD32_BACKENDS_CFILES = \
 	elf32-cr16c.c \
 	elf32-cris.c \
 	elf32-crx.c \
+	elf32-csky.c \
 	elf32-d10v.c \
 	elf32-d30v.c \
 	elf32-dlx.c \
diff --git a/bfd/Makefile.in b/bfd/Makefile.in
index 88b6b8e..eb84065 100644
--- a/bfd/Makefile.in
+++ b/bfd/Makefile.in
@@ -432,6 +432,7 @@  ALL_MACHINES = \
 	cpu-cr16c.lo \
 	cpu-cris.lo \
 	cpu-crx.lo \
+	cpu-csky.lo \
 	cpu-d10v.lo \
 	cpu-d30v.lo \
 	cpu-dlx.lo \
@@ -517,6 +518,7 @@  ALL_MACHINES_CFILES = \
 	cpu-cr16c.c \
 	cpu-cris.c \
 	cpu-crx.c \
+	cpu-csky.c \
 	cpu-d10v.c \
 	cpu-d30v.c \
 	cpu-dlx.c \
@@ -637,6 +639,7 @@  BFD32_BACKENDS = \
 	elf32-cr16c.lo \
 	elf32-cris.lo \
 	elf32-crx.lo \
+	elf32-csky.lo \
 	elf32-d10v.lo \
 	elf32-d30v.lo \
 	elf32-dlx.lo \
@@ -774,6 +777,7 @@  BFD32_BACKENDS_CFILES = \
 	elf32-cr16c.c \
 	elf32-cris.c \
 	elf32-crx.c \
+	elf32-csky.c \
 	elf32-d10v.c \
 	elf32-d30v.c \
 	elf32-dlx.c \
@@ -1231,6 +1235,7 @@  distclean-compile:
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/cpu-cr16c.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/cpu-cris.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/cpu-crx.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/cpu-csky.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/cpu-d10v.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/cpu-d30v.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/cpu-dlx.Plo@am__quote@
@@ -1328,6 +1333,7 @@  distclean-compile:
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/elf32-cr16c.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/elf32-cris.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/elf32-crx.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/elf32-csky.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/elf32-d10v.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/elf32-d30v.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/elf32-dlx.Plo@am__quote@
diff --git a/bfd/archures.c b/bfd/archures.c
index 3af7ddd..5d9eee8 100644
--- a/bfd/archures.c
+++ b/bfd/archures.c
@@ -516,6 +516,15 @@  DESCRIPTION
 .  bfd_arch_nfp,       {* Netronome Flow Processor *}
 .#define bfd_mach_nfp3200	0x3200
 .#define bfd_mach_nfp6000	0x6000
+.  bfd_arch_csky,      {* C-SKY.  *}
+.#define bfd_mach_ck_unknown    0
+.#define bfd_mach_ck510		1
+.#define bfd_mach_ck610		2
+.#define bfd_mach_ck801		3
+.#define bfd_mach_ck802		4
+.#define bfd_mach_ck803		5
+.#define bfd_mach_ck807		6
+.#define bfd_mach_ck810		7
 .  bfd_arch_last
 .  };
 */
@@ -570,6 +579,7 @@  extern const bfd_arch_info_type bfd_cr16_arch;
 extern const bfd_arch_info_type bfd_cr16c_arch;
 extern const bfd_arch_info_type bfd_cris_arch;
 extern const bfd_arch_info_type bfd_crx_arch;
+extern const bfd_arch_info_type bfd_csky_arch;
 extern const bfd_arch_info_type bfd_d10v_arch;
 extern const bfd_arch_info_type bfd_d30v_arch;
 extern const bfd_arch_info_type bfd_dlx_arch;
@@ -660,6 +670,7 @@  static const bfd_arch_info_type * const bfd_archures_list[] =
     &bfd_cr16c_arch,
     &bfd_cris_arch,
     &bfd_crx_arch,
+    &bfd_csky_arch,
     &bfd_d10v_arch,
     &bfd_d30v_arch,
     &bfd_dlx_arch,
diff --git a/bfd/bfd-in.h b/bfd/bfd-in.h
index 481587e..3d8c62b 100644
--- a/bfd/bfd-in.h
+++ b/bfd/bfd-in.h
@@ -1062,3 +1062,15 @@  extern bfd_boolean v850_elf_set_note
 /* MIPS ABI flags data access.  For the disassembler.  */
 struct elf_internal_abiflags_v0;
 extern struct elf_internal_abiflags_v0 *bfd_mips_elf_get_abiflags (bfd *);
+
+/* C-SKY functions.  */
+extern bfd_boolean elf32_csky_build_stubs
+  (struct bfd_link_info *);
+extern bfd_boolean elf32_csky_size_stubs
+  (bfd *, bfd *, struct bfd_link_info *, bfd_signed_vma,
+   struct bfd_section *(*) (const char*, struct bfd_section*),
+   void (*) (void));
+extern void elf32_csky_next_input_section 
+  (struct bfd_link_info *, struct bfd_section *);
+extern int elf32_csky_setup_section_lists
+  (bfd *, struct bfd_link_info *);
diff --git a/bfd/bfd-in2.h b/bfd/bfd-in2.h
index c64eee1..988a486 100644
--- a/bfd/bfd-in2.h
+++ b/bfd/bfd-in2.h
@@ -1069,6 +1069,18 @@  extern bfd_boolean v850_elf_set_note
 /* MIPS ABI flags data access.  For the disassembler.  */
 struct elf_internal_abiflags_v0;
 extern struct elf_internal_abiflags_v0 *bfd_mips_elf_get_abiflags (bfd *);
+
+/* C-SKY functions.  */
+extern bfd_boolean elf32_csky_build_stubs
+  (struct bfd_link_info *);
+extern bfd_boolean elf32_csky_size_stubs
+  (bfd *, bfd *, struct bfd_link_info *, bfd_signed_vma,
+   struct bfd_section *(*) (const char*, struct bfd_section*),
+   void (*) (void));
+extern void elf32_csky_next_input_section 
+  (struct bfd_link_info *, struct bfd_section *);
+extern int elf32_csky_setup_section_lists
+  (bfd *, struct bfd_link_info *);
 /* Extracted from init.c.  */
 void bfd_init (void);
 
@@ -2386,6 +2398,15 @@  enum bfd_architecture
   bfd_arch_nfp,       /* Netronome Flow Processor */
 #define bfd_mach_nfp3200       0x3200
 #define bfd_mach_nfp6000       0x6000
+  bfd_arch_csky,      /* C-SKY.  */
+#define bfd_mach_ck_unknown    0
+#define bfd_mach_ck510         1
+#define bfd_mach_ck610         2
+#define bfd_mach_ck801         3
+#define bfd_mach_ck802         4
+#define bfd_mach_ck803         5
+#define bfd_mach_ck807         6
+#define bfd_mach_ck810         7
   bfd_arch_last
   };
 
@@ -6549,6 +6570,73 @@  assembler and not (currently) written to any object files.  */
   BFD_RELOC_WASM32_CODE_POINTER,
   BFD_RELOC_WASM32_INDEX,
   BFD_RELOC_WASM32_PLT_SIG,
+
+/* C-SKY relocations.  */
+  BFD_RELOC_CKCORE_NONE,
+  BFD_RELOC_CKCORE_ADDR32,
+  BFD_RELOC_CKCORE_PCREL_IMM8BY4,
+  BFD_RELOC_CKCORE_PCREL_IMM11BY2,
+  BFD_RELOC_CKCORE_PCREL_IMM4BY2,
+  BFD_RELOC_CKCORE_PCREL32,
+  BFD_RELOC_CKCORE_PCREL_JSR_IMM11BY2,
+  BFD_RELOC_CKCORE_GNU_VTINHERIT,
+  BFD_RELOC_CKCORE_GNU_VTENTRY,
+  BFD_RELOC_CKCORE_RELATIVE,
+  BFD_RELOC_CKCORE_COPY,
+  BFD_RELOC_CKCORE_GLOB_DAT,
+  BFD_RELOC_CKCORE_JUMP_SLOT,
+  BFD_RELOC_CKCORE_GOTOFF,
+  BFD_RELOC_CKCORE_GOTPC,
+  BFD_RELOC_CKCORE_GOT32,
+  BFD_RELOC_CKCORE_PLT32,
+  BFD_RELOC_CKCORE_ADDRGOT,
+  BFD_RELOC_CKCORE_ADDRPLT,
+  BFD_RELOC_CKCORE_PCREL_IMM26BY2,
+  BFD_RELOC_CKCORE_PCREL_IMM16BY2,
+  BFD_RELOC_CKCORE_PCREL_IMM16BY4,
+  BFD_RELOC_CKCORE_PCREL_IMM10BY2,
+  BFD_RELOC_CKCORE_PCREL_IMM10BY4,
+  BFD_RELOC_CKCORE_ADDR_HI16,
+  BFD_RELOC_CKCORE_ADDR_LO16,
+  BFD_RELOC_CKCORE_GOTPC_HI16,
+  BFD_RELOC_CKCORE_GOTPC_LO16,
+  BFD_RELOC_CKCORE_GOTOFF_HI16,
+  BFD_RELOC_CKCORE_GOTOFF_LO16,
+  BFD_RELOC_CKCORE_GOT12,
+  BFD_RELOC_CKCORE_GOT_HI16,
+  BFD_RELOC_CKCORE_GOT_LO16,
+  BFD_RELOC_CKCORE_PLT12,
+  BFD_RELOC_CKCORE_PLT_HI16,
+  BFD_RELOC_CKCORE_PLT_LO16,
+  BFD_RELOC_CKCORE_ADDRGOT_HI16,
+  BFD_RELOC_CKCORE_ADDRGOT_LO16,
+  BFD_RELOC_CKCORE_ADDRPLT_HI16,
+  BFD_RELOC_CKCORE_ADDRPLT_LO16,
+  BFD_RELOC_CKCORE_PCREL_JSR_IMM26BY2,
+  BFD_RELOC_CKCORE_TOFFSET_LO16,
+  BFD_RELOC_CKCORE_DOFFSET_LO16,
+  BFD_RELOC_CKCORE_PCREL_IMM18BY2,
+  BFD_RELOC_CKCORE_DOFFSET_IMM18,
+  BFD_RELOC_CKCORE_DOFFSET_IMM18BY2,
+  BFD_RELOC_CKCORE_DOFFSET_IMM18BY4,
+  BFD_RELOC_CKCORE_GOTOFF_IMM18,
+  BFD_RELOC_CKCORE_GOT_IMM18BY4,
+  BFD_RELOC_CKCORE_PLT_IMM18BY4,
+  BFD_RELOC_CKCORE_PCREL_IMM7BY4,
+  BFD_RELOC_CKCORE_TLS_LE32,
+  BFD_RELOC_CKCORE_TLS_IE32,
+  BFD_RELOC_CKCORE_TLS_GD32,
+  BFD_RELOC_CKCORE_TLS_LDM32,
+  BFD_RELOC_CKCORE_TLS_LDO32,
+  BFD_RELOC_CKCORE_TLS_DTPMOD32,
+  BFD_RELOC_CKCORE_TLS_DTPOFF32,
+  BFD_RELOC_CKCORE_TLS_TPOFF32,
+  BFD_RELOC_CKCORE_PCREL_FLRW_IMM8BY4,
+  BFD_RELOC_CKCORE_NOJSRI,
+  BFD_RELOC_CKCORE_CALLGRAPH,
+  BFD_RELOC_CKCORE_IRELATIVE,
+  BFD_RELOC_CKCORE_PCREL_BLOOP_IMM4BY4,
+  BFD_RELOC_CKCORE_PCREL_BLOOP_IMM12BY4,
   BFD_RELOC_UNUSED };
 
 typedef enum bfd_reloc_code_real bfd_reloc_code_real_type;
diff --git a/bfd/config.bfd b/bfd/config.bfd
index 0db8ed4..5e09577 100644
--- a/bfd/config.bfd
+++ b/bfd/config.bfd
@@ -170,6 +170,7 @@  c54x*)		 targ_archs=bfd_tic54x_arch ;;
 cr16*)		 targ_archs=bfd_cr16_arch ;;
 crisv32)	 targ_archs=bfd_cris_arch ;;
 crx*)		 targ_archs=bfd_crx_arch ;;
+csky*)	 	 targ_archs=bfd_csky_arch ;;
 dlx*)		 targ_archs=bfd_dlx_arch ;;
 fido*)		 targ_archs=bfd_m68k_arch ;;
 hppa*)		 targ_archs=bfd_hppa_arch ;;
@@ -461,6 +462,11 @@  case "${targ}" in
     targ_underscore=yes
     ;;
 
+  csky-*-elf* | csky-*-linux* )
+    targ_defvec=csky_elf32_be_vec
+    targ_selvecs="csky_elf32_be_vec csky_elf32_le_vec"
+    ;;
+
   d10v-*-*)
     targ_defvec=d10v_elf32_vec
     ;;
diff --git a/bfd/configure b/bfd/configure
index 2f3dbe7..07aafda 100755
--- a/bfd/configure
+++ b/bfd/configure
@@ -14406,6 +14406,8 @@  do
     cris_elf32_vec)		 tb="$tb elf32-cris.lo elf32.lo $elf" ;;
     cris_elf32_us_vec)		 tb="$tb elf32-cris.lo elf32.lo $elf" ;;
     crx_elf32_vec)		 tb="$tb elf32-crx.lo elf32.lo $elf" ;;
+    csky_elf32_be_vec)		 tb="$tb elf32-csky.lo elf32.lo $elf" ;;
+    csky_elf32_le_vec)		 tb="$tb elf32-csky.lo elf32.lo $elf" ;;
     d10v_elf32_vec)		 tb="$tb elf32-d10v.lo elf32.lo $elf" ;;
     d30v_elf32_vec)		 tb="$tb elf32-d30v.lo elf32.lo $elf" ;;
     dlx_elf32_be_vec)		 tb="$tb elf32-dlx.lo elf32.lo $elf" ;;
diff --git a/bfd/configure.ac b/bfd/configure.ac
index b320828..e90f482 100644
--- a/bfd/configure.ac
+++ b/bfd/configure.ac
@@ -461,6 +461,8 @@  do
     cris_elf32_vec)		 tb="$tb elf32-cris.lo elf32.lo $elf" ;;
     cris_elf32_us_vec)		 tb="$tb elf32-cris.lo elf32.lo $elf" ;;
     crx_elf32_vec)		 tb="$tb elf32-crx.lo elf32.lo $elf" ;;
+    csky_elf32_be_vec)		 tb="$tb elf32-csky.lo elf32.lo $elf" ;;
+    csky_elf32_le_vec)		 tb="$tb elf32-csky.lo elf32.lo $elf" ;;
     d10v_elf32_vec)		 tb="$tb elf32-d10v.lo elf32.lo $elf" ;;
     d30v_elf32_vec)		 tb="$tb elf32-d30v.lo elf32.lo $elf" ;;
     dlx_elf32_be_vec)		 tb="$tb elf32-dlx.lo elf32.lo $elf" ;;
diff --git a/bfd/cpu-csky.c b/bfd/cpu-csky.c
new file mode 100644
index 0000000..4b9ff63
--- /dev/null
+++ b/bfd/cpu-csky.c
@@ -0,0 +1,60 @@ 
+/* BFD support for C-SKY processors.
+   Copyright (C) 1994-2018 Free Software Foundation, Inc.
+   Contributed by C-SKY Microsystems and Mentor Graphics.
+
+   This file is part of BFD, the Binary File Descriptor library.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+   MA 02110-1301, USA.  */
+
+#include "sysdep.h"
+#include "bfd.h"
+#include "libbfd.h"
+
+#define N(NUMBER, PRINT, ISDEFAULT, NEXT)  \
+{                                                                      \
+  32,                     /* 32 bits in a word */                      \
+  32,                     /* 32 bits in an address */                  \
+  8,                      /* 8 bits in a byte */                       \
+  bfd_arch_csky,          /* Architecture */                           \
+  NUMBER,                 /* Machine number */                         \
+  "csky",                 /* Architecture name */                      \
+  PRINT,                  /* Printable name */                         \
+  3,                      /* Section align power */                    \
+  ISDEFAULT,              /* Is this the default architecture ? */     \
+  bfd_default_compatible, /* Architecture comparison function */       \
+  bfd_default_scan,       /* String to architecture conversion */      \
+  bfd_arch_default_fill,                                               \
+  NEXT                    /* Next in list */                           \
+}
+
+static const bfd_arch_info_type arch_info_struct[] =
+{
+  /* ABI v1 processors. */
+  N (bfd_mach_ck510,   "csky:ck510",    FALSE, & arch_info_struct[1]),
+  N (bfd_mach_ck610,   "csky:ck610",    FALSE, & arch_info_struct[2]),
+
+  /* ABI v2 processors.  */
+  N (bfd_mach_ck801,   "csky:ck801",    FALSE, & arch_info_struct[3]),
+  N (bfd_mach_ck802,   "csky:ck802",    FALSE, & arch_info_struct[4]),
+  N (bfd_mach_ck803,   "csky:ck803",    FALSE, & arch_info_struct[5]),
+  N (bfd_mach_ck807,   "csky:ck807",    FALSE, & arch_info_struct[6]),
+  N (bfd_mach_ck810,   "csky:ck810",    FALSE, & arch_info_struct[7]),
+  N (bfd_mach_ck_unknown, "csky:any",   FALSE, NULL)
+};
+
+const bfd_arch_info_type bfd_csky_arch =
+  N (0, "csky", TRUE, & arch_info_struct[0]);
+
diff --git a/bfd/elf-bfd.h b/bfd/elf-bfd.h
index 7b74690..6a1feb6 100644
--- a/bfd/elf-bfd.h
+++ b/bfd/elf-bfd.h
@@ -489,6 +489,7 @@  enum elf_target_id
   AVR_ELF_DATA,
   BFIN_ELF_DATA,
   CRIS_ELF_DATA,
+  CSKY_ELF_DATA,
   FRV_ELF_DATA,
   HPPA32_ELF_DATA,
   HPPA64_ELF_DATA,
diff --git a/bfd/elf32-csky.c b/bfd/elf32-csky.c
new file mode 100644
index 0000000..04fbd47
--- /dev/null
+++ b/bfd/elf32-csky.c
@@ -0,0 +1,4999 @@ 
+/* 32-bit ELF support for C-SKY.
+   Copyright (C) 1998-2018 Free Software Foundation, Inc.
+   Contributed by C-SKY Microsystems and Mentor Graphics.
+
+   This file is part of BFD, the Binary File Descriptor library.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+   MA 02110-1301, USA.  */
+
+#include "sysdep.h"
+#include "bfd.h"
+#include "bfdlink.h"
+#include "libbfd.h"
+#include "elf-bfd.h"
+#include "elf/csky.h"
+#include "opcode/csky.h"
+#include <assert.h>
+#include "libiberty.h"
+
+/* Data structures used for merging different arch variants.
+   V1 (510/610) and V2 (8xx) processors are incompatible, but
+   we can merge wthin each family.  */
+
+enum merge_class
+{
+  CSKY_V1,
+  CSKY_V2
+};
+
+typedef struct csky_arch_for_merge
+{
+  const char *name;
+  const unsigned long arch_eflag;
+  /* The files can merge only if they are in same class.  */
+  enum merge_class class;
+  /* When input files have different levels,
+     the target sets arch_eflag to the largest level file's arch_eflag.  */
+  unsigned int class_level;
+  /* Control whether to print warning when merging with different arch.  */
+  unsigned int do_warning;
+} csky_arch_for_merge;
+
+static struct csky_arch_for_merge csky_archs[] =
+{
+  /* 510 and 610 merge to 610 without warning.  */
+  { "510",  CSKY_ARCH_510,  CSKY_V1,  0, 0},
+  { "610",  CSKY_ARCH_610,  CSKY_V1,  1, 0},
+  /* 801, 802, 803, 807, 810 merge to largest one.  */
+  { "801",  CSKY_ARCH_801,  CSKY_V2,  0, 1},
+  { "802",  CSKY_ARCH_802,  CSKY_V2,  1, 1},
+  { "803",  CSKY_ARCH_803,  CSKY_V2,  2, 1},
+  { "807",  CSKY_ARCH_807,  CSKY_V2,  3, 1},
+  { "810",  CSKY_ARCH_810,  CSKY_V2,  4, 1},
+  { NULL, 0, 0, 0, 0}
+};
+
+/* Return the ARCH bits out of ABFD.  */
+#define bfd_csky_arch(abfd) \
+  (elf_elfheader (abfd)->e_flags & CSKY_ARCH_MASK)
+
+/* Return the ABI bits out of ABFD.  */
+#define bfd_csky_abi(abfd) \
+  (elf_elfheader (abfd)->e_flags & CSKY_ABI_MASK)
+
+
+/* The index of a howto-item is implicitly equal to
+   the corresponding Relocation Type Encoding.  */
+static reloc_howto_type csky_elf_howto_table[] =
+{
+  /* 0 */
+  HOWTO (R_CKCORE_NONE,               /* type */
+	 0,                           /* rightshift */
+	 0,                           /* size */
+	 0,                           /* bitsize */
+	 FALSE,                       /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_dont,      /* complain_on_overflow */
+	 NULL,                        /* special_function */
+	 "R_CKCORE_NONE",             /* name */
+	 FALSE,                       /* partial_inplace */
+	 0,                           /* src_mask */
+	 0,                           /* dst_mask */
+	 FALSE),                      /* pcrel_offset */
+
+  /* 1.  */
+  HOWTO (R_CKCORE_ADDR32,             /* type */
+	 0,                           /* rightshift */
+	 2,                           /* size */
+	 32,                          /* bitsize */
+	 FALSE,                       /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_dont,      /* complain_on_overflow */
+	 bfd_elf_generic_reloc,       /* special_function */
+	 "R_CKCORE_ADDR32",           /* name */
+	 FALSE,                       /* partial_inplace */
+	 0,                           /* src_mask */
+	 0xffffffff,                  /* dst_mask */
+	 FALSE),                      /* pcrel_offset */
+
+  /* 2: Only for csky v1.  */
+  HOWTO (R_CKCORE_PCREL_IMM8BY4,      /* type */
+	 2,                           /* rightshift */
+	 1,                           /* size */
+	 8,                           /* bitsize */
+	 TRUE,                        /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_bitfield,  /* complain_on_overflow */
+	 NULL,                        /* special_function */
+	 "R_CKCORE_PCREL_IMM8BY4",    /* name */
+	 FALSE,                       /* partial_inplace */
+	 0xff,                        /* src_mask */
+	 0xff,                        /* dst_mask */
+	 TRUE),                       /* pcrel_offset */
+
+  /* 3: Only for csky v1.  */
+  HOWTO (R_CKCORE_PCREL_IMM11BY2,     /* type */
+	 1,                           /* rightshift */
+	 1,                           /* size */
+	 11,                          /* bitsize */
+	 TRUE,                        /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_signed,    /* complain_on_overflow */
+	 bfd_elf_generic_reloc,       /* special_function */
+	 "R_CKCORE_PCREL_IMM11BY2",   /* name */
+	 FALSE,                       /* partial_inplace */
+	 0x7ff,                       /* src_mask */
+	 0x7ff,                       /* dst_mask */
+	 TRUE),                       /* pcrel_offset */
+
+  /* 4: DELETED.  */
+  HOWTO (R_CKCORE_PCREL_IMM4BY2,0,0,0,0,0,0,0,"R_CKCORE_PCREL_IMM4BY2",0,0,0,0),
+
+  /* 5.  */
+  HOWTO (R_CKCORE_PCREL32,            /* type */
+	 0,                           /* rightshift */
+	 2,                           /* size */
+	 32,                          /* bitsize */
+	 TRUE,                        /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_dont,      /* complain_on_overflow */
+	 NULL,                        /* special_function */
+	 "R_CKCORE_PCREL32",          /* name */
+	 FALSE,                       /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0xffffffff,                  /* dst_mask */
+	 TRUE),                       /* pcrel_offset */
+
+  /* 6: Only for csky v1.  */
+  HOWTO (R_CKCORE_PCREL_JSR_IMM11BY2, /* type */
+	 1,                           /* rightshift */
+	 1,                           /* size */
+	 11,                          /* bitsize */
+	 TRUE,                        /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_signed,    /* complain_on_overflow */
+	 bfd_elf_generic_reloc,       /* special_function */
+	 "R_CKCORE_PCREL_JSR_IMM11BY2", /* name */
+	 FALSE,                       /* partial_inplace */
+	 0x7ff,                       /* src_mask */
+	 0x7ff,                       /* dst_mask */
+	 TRUE),                       /* pcrel_offset */
+
+  /* 7: GNU extension to record C++ vtable member usage.  */
+  HOWTO (R_CKCORE_GNU_VTENTRY,        /* type */
+	 0,                           /* rightshift */
+	 2,                           /* size */
+	 0,                           /* bitsize */
+	 FALSE,                       /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_dont,      /* complain_on_overflow */
+	 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
+	 "R_CKCORE_GNU_VTENTRY",      /* name */
+	 FALSE,                       /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0x0,                         /* dst_mask */
+	 FALSE),                      /* pcrel_offset */
+
+  /* 8: GNU extension to record C++ vtable hierarchy.  */
+  HOWTO (R_CKCORE_GNU_VTINHERIT,      /* type */
+	 0,                           /* rightshift */
+	 2,                           /* size */
+	 0,                           /* bitsize */
+	 FALSE,                       /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_dont,      /* complain_on_overflow */
+	 NULL,                        /* special_function */
+	 "R_CKCORE_GNU_VTINHERIT",    /* name */
+	 FALSE,                       /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0x0,                         /* dst_mask */
+	 FALSE),                      /* pcrel_offset */
+
+  /* 9.  */
+  HOWTO (R_CKCORE_RELATIVE,           /* type */
+	 0,                           /* rightshift */
+	 2,                           /* size */
+	 32,                          /* bitsize */
+	 FALSE,                       /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_signed,    /* complain_on_overflow */
+	 bfd_elf_generic_reloc,       /* special_function */
+	 "R_CKCORE_RELATIVE",         /* name */
+	 TRUE,                        /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0xffffffff,                  /* dst_mask */
+	 FALSE),                      /* pcrel_offset */
+
+  /* 10: None.  */
+  /* FIXME:  It is a bug that copy relocations are not implemented.  */
+  HOWTO (R_CKCORE_COPY,0,0,0,0,0,0,0,"R_CKCORE_",0,0,0,0),
+
+  /* 11: None.  */
+  HOWTO (R_CKCORE_GLOB_DAT,0,0,0,0,0,0,0,"R_CKCORE_",0,0,0,0),
+
+  /* 12: None.  */
+  HOWTO (R_CKCORE_JUMP_SLOT,0,0,0,0,0,0,0,"R_CKCORE_",0,0,0,0),
+
+  /* 13.  */
+  HOWTO (R_CKCORE_GOTOFF,             /* type */
+	 0,                           /* rightshift */
+	 2,                           /* size */
+	 32,                          /* bitsize */
+	 FALSE,                       /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_dont,      /* complain_on_overflow */
+	 bfd_elf_generic_reloc,       /* special_function */
+	 "R_CKCORE_GOTOFF",           /* name */
+	 TRUE,                        /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0xffffffffl,                 /* dst_mask */
+	 FALSE),                      /* pcrel_offset */
+
+  /* 14.  */
+  HOWTO (R_CKCORE_GOTPC,              /* type */
+	 0,                           /* rightshift */
+	 2,                           /* size */
+	 32,                          /* bitsize */
+	 TRUE,                        /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_dont,      /* complain_on_overflow */
+	 bfd_elf_generic_reloc,       /* special_function */
+	 "R_CKCORE_GOTPC",            /* name */
+	 TRUE,                        /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0xffffffff,                  /* dst_mask */
+	 FALSE),                      /* pcrel_offset */
+
+  /* 15.  */
+  HOWTO (R_CKCORE_GOT32,              /* type */
+	 0,                           /* rightshift */
+	 2,                           /* size */
+	 32,                          /* bitsize */
+	 FALSE,                       /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_dont,      /* complain_on_overflow */
+	 bfd_elf_generic_reloc,       /* special_function */
+	 "R_CKCORE_GOT32",            /* name */
+	 TRUE,                        /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0xffffffff,                  /* dst_mask */
+	 TRUE),                       /* pcrel_offset */
+
+  /* 16.  */
+  HOWTO (R_CKCORE_PLT32,              /* type */
+	 0,                           /* rightshift */
+	 2,                           /* size */
+	 32,                          /* bitsize */
+	 FALSE,                       /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_dont,      /* complain_on_overflow */
+	 bfd_elf_generic_reloc,       /* special_function */
+	 "R_CKCORE_PLT32",            /* name */
+	 TRUE,                        /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0xffffffff,                  /* dst_mask */
+	 TRUE),                       /* pcrel_offset */
+
+  /* 17: None.  */
+  HOWTO (R_CKCORE_ADDRGOT,0,0,0,0,0,0,0,"R_CKCORE_ADDRGOT",0,0,0,0),
+
+  /* 18: None.  */
+  HOWTO (R_CKCORE_ADDRPLT,0,0,0,0,0,0,0,"R_CKCORE_ADDRPLT",0,0,0,0),
+
+  /* 19: Only for csky v2.  */
+  HOWTO (R_CKCORE_PCREL_IMM26BY2,     /* type */
+	 1,                           /* rightshift */
+	 2,                           /* size */
+	 26,                          /* bitsize */
+	 TRUE,                        /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_signed,    /* complain_on_overflow */
+	 bfd_elf_generic_reloc,       /* special_function */
+	 "R_CKCORE_PCREL_IMM26BY2",   /* name */
+	 FALSE,                       /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0x3ffffff,                   /* dst_mask */
+	 TRUE),                       /* pcrel_offset */
+
+  /* 20: Only for csky v2.  */
+  HOWTO (R_CKCORE_PCREL_IMM16BY2,     /* type */
+	 1,                           /* rightshift */
+	 2,                           /* size */
+	 16,                          /* bitsize */
+	 TRUE,                        /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_signed,    /* complain_on_overflow */
+	 NULL,                        /* special_function */
+	 "R_CKCORE_PCREL_IMM16BY2",   /* name */
+	 FALSE,                       /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0xffff,                      /* dst_mask */
+	 TRUE),                       /* pcrel_offset */
+
+  /* 21: Only for csky v2.  */
+  HOWTO (R_CKCORE_PCREL_IMM16BY4,     /* type */
+	 2,                           /* rightshift */
+	 2,                           /* size */
+	 16,                          /* bitsize */
+	 TRUE,                        /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_bitfield,  /* complain_on_overflow */
+	 NULL,                        /* special_function */
+	 "R_CKCORE_PCREL_IMM16BY4",   /* name */
+	 FALSE,                       /* partial_inplace */
+	 0xffff0000,                  /* src_mask */
+	 0xffff,                      /* dst_mask */
+	 TRUE),                       /* pcrel_offset */
+
+  /* 22: Only for csky v2.  */
+  HOWTO (R_CKCORE_PCREL_IMM10BY2,     /* type */
+	 1,                           /* rightshift */
+	 1,                           /* size */
+	 10,                          /* bitsize */
+	 TRUE,                        /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_signed,    /* complain_on_overflow */
+	 bfd_elf_generic_reloc,       /* special_function */
+	 "R_CKCORE_PCREL_IMM10BY2",   /* name */
+	 FALSE,                       /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0x3ff,                       /* dst_mask */
+	 TRUE),                       /* pcrel_offset */
+
+  /* 23: Only for csky v2.  */
+  HOWTO (R_CKCORE_PCREL_IMM10BY4,     /* type */
+	 2,                           /* rightshift */
+	 2,                           /* size */
+	 10,                          /* bitsize */
+	 TRUE,                        /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_bitfield,  /* complain_on_overflow */
+	 NULL,                        /* special_function */
+	 "R_CKCORE_PCREL_IMM10BY4",   /* name */
+	 FALSE,                       /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0x3ff,                       /* dst_mask */
+	 TRUE),                       /* pcrel_offset */
+
+  /* 24: Only for csky v2.  */
+  HOWTO (R_CKCORE_ADDR_HI16,          /* type */
+	 16,                          /* rightshift */
+	 2,                           /* size */
+	 16,                          /* bitsize */
+	 FALSE,                       /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_dont,      /* complain_on_overflow */
+	 bfd_elf_generic_reloc,       /* special_function */
+	 "R_CKCORE_ADDR_HI16",        /* name */
+	 FALSE,                       /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0xffff,                      /* dst_mask */
+	 FALSE),                      /* pcrel_offset */
+
+  /* 25.  */
+  HOWTO (R_CKCORE_ADDR_LO16,          /* type */
+	 0,                           /* rightshift */
+	 2,                           /* size */
+	 16,                          /* bitsize */
+	 FALSE,                       /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_dont,      /* complain_on_overflow */
+	 bfd_elf_generic_reloc,       /* special_function */
+	 "R_CKCORE_ADDR_LO16",        /* name */
+	 FALSE,                       /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0xffff,                      /* dst_mask */
+	 FALSE),                      /* pcrel_offset */
+
+  /* 26.  */
+  HOWTO (R_CKCORE_GOTPC_HI16,         /* type */
+	 16,                          /* rightshift */
+	 2,                           /* size */
+	 16,                          /* bitsize */
+	 TRUE,                        /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_dont,      /* complain_on_overflow */
+	 bfd_elf_generic_reloc,       /* special_function */
+	 "R_CKCORE_GOTPC_HI16",       /* name */
+	 FALSE,                       /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0xffff,                      /* dst_mask */
+	 FALSE),                      /* pcrel_offset */
+
+  /* 27.  */
+  HOWTO (R_CKCORE_GOTPC_LO16,         /* type */
+	 0,                           /* rightshift */
+	 2,                           /* size */
+	 16,                          /* bitsize */
+	 TRUE,                        /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_dont,      /* complain_on_overflow */
+	 bfd_elf_generic_reloc,       /* special_function */
+	 "R_CKCORE_GOTPC_LO16",       /* name */
+	 FALSE,                       /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0xffff,                      /* dst_mask */
+	 FALSE),                      /* pcrel_offset */
+
+  /* 28.  */
+  HOWTO (R_CKCORE_GOTOFF_HI16,        /* type */
+	 16,                          /* rightshift */
+	 2,                           /* size */
+	 16,                          /* bitsize */
+	 FALSE,                       /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_dont,      /* complain_on_overflow */
+	 bfd_elf_generic_reloc,       /* special_function */
+	 "R_CKCORE_GOTOFF_HI16",      /* name */
+	 FALSE,                       /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0xffff,                      /* dst_mask */
+	 FALSE),                      /* pcrel_offset */
+
+  /* 29.  */
+  HOWTO (R_CKCORE_GOTOFF_LO16,        /* type */
+	 0,                           /* rightshift */
+	 2,                           /* size */
+	 16,                          /* bitsize */
+	 FALSE,                       /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_dont,      /* complain_on_overflow */
+	 bfd_elf_generic_reloc,       /* special_function */
+	 "R_CKCORE_GOTOFF_LO16",      /* name */
+	 FALSE,                       /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0xffff,                      /* dst_mask */
+	 FALSE),                      /* pcrel_offset */
+
+  /* 30.  */
+  HOWTO (R_CKCORE_GOT12,              /* type */
+	 2,                           /* rightshift */
+	 2,                           /* size */
+	 12,                          /* bitsize */
+	 FALSE,                       /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_bitfield,  /* complain_on_overflow */
+	 bfd_elf_generic_reloc,       /* special_function */
+	 "R_CKCORE_GOT12",            /* name */
+	 TRUE,                        /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0xfff,                       /* dst_mask */
+	 FALSE),                      /* pcrel_offset */
+
+  /* 31.  */
+  HOWTO (R_CKCORE_GOT_HI16,           /* type */
+	 16,                          /* rightshift */
+	 2,                           /* size */
+	 16,                          /* bitsize */
+	 FALSE,                       /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_dont,      /* complain_on_overflow */
+	 bfd_elf_generic_reloc,       /* special_function */
+	 "R_CKCORE_GOT_HI16",         /* name */
+	 TRUE,                       /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0xffff,                      /* dst_mask */
+	 FALSE),                      /* pcrel_offset */
+
+  /* 32.  */
+  HOWTO (R_CKCORE_GOT_LO16,           /* type */
+	 0,                           /* rightshift */
+	 2,                           /* size */
+	 16,                          /* bitsize */
+	 FALSE,                       /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_dont,      /* complain_on_overflow */
+	 bfd_elf_generic_reloc,       /* special_function */
+	 "R_CKCORE_GOT_LO16",         /* name */
+	 TRUE,                        /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0xffff,                      /* dst_mask */
+	 FALSE),                      /* pcrel_offset */
+
+  /* 33.  */
+  HOWTO (R_CKCORE_PLT12,              /* type */
+	 2,                           /* rightshift */
+	 2,                           /* size */
+	 12,                          /* bitsize */
+	 FALSE,                       /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_bitfield,  /* complain_on_overflow */
+	 bfd_elf_generic_reloc,       /* special_function */
+	 "R_CKCORE_PLT12",            /* name */
+	 TRUE,                        /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0xfff,                       /* dst_mask */
+	 FALSE),                      /* pcrel_offset */
+
+  /* 34.  */
+  HOWTO (R_CKCORE_PLT_HI16,           /* type */
+	 16,                          /* rightshift */
+	 2,                           /* size */
+	 16,                          /* bitsize */
+	 FALSE,                       /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_dont,      /* complain_on_overflow */
+	 bfd_elf_generic_reloc,       /* special_function */
+	 "R_CKCORE_PLT_HI16",         /* name */
+	 TRUE,                        /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0xffff,                      /* dst_mask */
+	 FALSE),                      /* pcrel_offset */
+
+  /* 35.  */
+  HOWTO (R_CKCORE_PLT_LO16,           /* type */
+	 0,                           /* rightshift */
+	 2,                           /* size */
+	 16,                          /* bitsize */
+	 FALSE,                       /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_dont,      /* complain_on_overflow */
+	 bfd_elf_generic_reloc,       /* special_function */
+	 "R_CKCORE_PLT_LO16",         /* name */
+	 TRUE,                       /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0xffff,                      /* dst_mask */
+	 FALSE),                      /* pcrel_offset */
+
+  /* 36: None.  */
+  HOWTO (R_CKCORE_ADDRGOT_HI16,0,0,0,0,0,0,0,"R_CKCORE_",0,0,0,0),
+
+  /* 37: None.  */
+  HOWTO (R_CKCORE_ADDRGOT_LO16,0,0,0,0,0,0,0,"R_CKCORE_",0,0,0,0),
+
+  /* 38: None.  */
+  HOWTO (R_CKCORE_ADDRPLT_HI16,0,0,0,0,0,0,0,"R_CKCORE_",0,0,0,0),
+
+  /* 39: None.  */
+  HOWTO (R_CKCORE_ADDRPLT_LO16,0,0,0,0,0,0,0,"R_CKCORE_",0,0,0,0),
+
+  /* 40.  */
+  HOWTO (R_CKCORE_PCREL_JSR_IMM26BY2, /* type */
+	 1,                           /* rightshift */
+	 2,                           /* size */
+	 26,                          /* bitsize */
+	 TRUE,                        /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_signed,    /* complain_on_overflow */
+	 bfd_elf_generic_reloc,       /* special_function */
+	 "R_CKCORE_PCREL_JSR_IMM26BY2", /* name */
+	 FALSE,                       /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0x3ffffff,                   /* dst_mask */
+	 TRUE),                       /* pcrel_offset */
+
+  /* 41.  */
+  HOWTO (R_CKCORE_TOFFSET_LO16,       /* type */
+	 0,                           /* rightshift */
+	 2,                           /* size */
+	 16,                          /* bitsize */
+	 FALSE,                       /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_unsigned,  /* complain_on_overflow */
+	 NULL,                        /* special_function */
+	 "R_CKCORE_TOFFSET_LO16",     /* name */
+	 FALSE,                       /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0xffff,                      /* dst_mask */
+	 FALSE),                      /* pcrel_offset */
+
+  /* 42.  */
+  HOWTO (R_CKCORE_DOFFSET_LO16,       /* type */
+	 0,                           /* rightshift */
+	 2,                           /* size */
+	 16,                          /* bitsize */
+	 FALSE,                       /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_unsigned,  /* complain_on_overflow */
+	 NULL,                        /* special_function */
+	 "R_CKCORE_DOFFSET_LO16",     /* name */
+	 FALSE,                       /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0xffff,                      /* dst_mask */
+	 FALSE),                      /* pcrel_offset */
+
+  /* 43.  */
+  HOWTO (R_CKCORE_PCREL_IMM18BY2,     /* type */
+	 1,                           /* rightshift */
+	 2,                           /* size */
+	 18,                          /* bitsize */
+	 TRUE,                        /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_signed,    /* complain_on_overflow */
+	 NULL,                        /* special_function */
+	 "R_CKCORE_PCREL_IMM18BY2",   /* name */
+	 FALSE,                       /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0x3ffff,                     /* dst_mask */
+	 TRUE),                       /* pcrel_offset */
+
+  /* 44.  */
+  HOWTO (R_CKCORE_DOFFSET_IMM18,      /* type */
+	 0,                           /* rightshift */
+	 2,                           /* size */
+	 18,                          /* bitsize */
+	 FALSE,                       /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_unsigned,  /* complain_on_overflow */
+	 NULL,                        /* special_function */
+	 "R_CKCORE_DOFFSET_IMM18",    /* name */
+	 FALSE,                       /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0x3ffff,                     /* dst_mask */
+	 FALSE),                      /* pcrel_offset */
+
+  /* 45.  */
+  HOWTO (R_CKCORE_DOFFSET_IMM18BY2,   /* type */
+	 1,                           /* rightshift */
+	 2,                           /* size */
+	 18,                          /* bitsize */
+	 FALSE,                       /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_unsigned,  /* complain_on_overflow */
+	 NULL,                        /* special_function */
+	 "R_CKCORE_DOFFSET_IMM18BY2", /* name */
+	 FALSE,                       /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0x3ffff,                     /* dst_mask */
+	 FALSE),                      /* pcrel_offset */
+
+  /* 46.  */
+  HOWTO (R_CKCORE_DOFFSET_IMM18BY4,   /* type */
+	 2,                           /* rightshift */
+	 2,                           /* size */
+	 18,                          /* bitsize */
+	 FALSE,                       /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_unsigned,  /* complain_on_overflow */
+	 NULL,                        /* special_function */
+	 "R_CKCORE_DOFFSET_IMM18BY4", /* name */
+	 FALSE,                       /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0x3ffff,                     /* dst_mask */
+	 FALSE),                      /* pcrel_offset */
+
+  /* 47.  */
+  HOWTO (R_CKCORE_GOTOFF_IMM18,       /* type */
+	 0,                           /* rightshift */
+	 2,                           /* size */
+	 18,                          /* bitsize */
+	 FALSE,                       /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_bitfield,  /* complain_on_overflow */
+	 bfd_elf_generic_reloc,       /* special_function */
+	 "R_CKCORE_GOTOFF_IMM18",     /* name */
+	 TRUE,                        /* partial_inplace */
+	 0xfffc,                      /* src_mask */
+	 0x3ffff,                     /* dst_mask */
+	 FALSE),                      /* pcrel_offset */
+
+  /* 48.  */
+  HOWTO (R_CKCORE_GOT_IMM18BY4,       /* type */
+	 2,                           /* rightshift */
+	 2,                           /* size */
+	 18,                          /* bitsize */
+	 FALSE,                       /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_bitfield,  /* complain_on_overflow */
+	 bfd_elf_generic_reloc,       /* special_function */
+	 "R_CKCORE_GOT_IMM18BY4",     /* name */
+	 TRUE,                        /* partial_inplace */
+	 0xfffc,                      /* src_mask */
+	 0x3ffff,                     /* dst_mask */
+	 FALSE),                      /* pcrel_offset */
+
+  /* 49.  */
+  HOWTO (R_CKCORE_PLT_IMM18BY4,       /* type */
+	 2,                           /* rightshift */
+	 2,                           /* size */
+	 18,                          /* bitsize */
+	 FALSE,                       /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_bitfield,  /* complain_on_overflow */
+	 bfd_elf_generic_reloc,       /* special_function */
+	 "R_CKCORE_PLT_IMM18BY4",     /* name */
+	 TRUE,                        /* partial_inplace */
+	 0xfffc,                      /* src_mask */
+	 0x3ffff,                     /* dst_mask */
+	 TRUE),                       /* pcrel_offset */
+
+  /* 50: for lrw16.  */
+  HOWTO (R_CKCORE_PCREL_IMM7BY4,      /* type */
+	 2,                           /* rightshift */
+	 1,                           /* size */
+	 7,                           /* bitsize */
+	 TRUE,                        /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_bitfield,  /* complain_on_overflow */
+	 bfd_elf_generic_reloc,       /* special_function */
+	 "R_CKCORE_PCREL_IMM7BY4",    /* name */
+	 FALSE,                       /* partial_inplace */
+	 0xec1f,                      /* src_mask */
+	 0x31f,                       /* dst_mask */
+	 TRUE),                       /* pcrel_offset */
+
+  /* 51: for static nptl.  */
+  HOWTO (R_CKCORE_TLS_LE32,           /* type */
+	 0,                           /* rightshift */
+	 2,                           /* size */
+	 32,                          /* bitsize */
+	 FALSE,                       /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_dont,      /* complain_on_overflow */
+	 bfd_elf_generic_reloc,       /* special_function */
+	 "R_CKCORE_TLS_LE32",         /* name */
+	 FALSE,                       /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0xffffffff,                  /* dst_mask */
+	 TRUE),                       /* pcrel_offset */
+
+  /* 52: for static nptl.  */
+  HOWTO (R_CKCORE_TLS_IE32,           /* type */
+	 0,                           /* rightshift */
+	 2,                           /* size */
+	 32,                          /* bitsize */
+	 FALSE,                       /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_dont,      /* complain_on_overflow */
+	 bfd_elf_generic_reloc,       /* special_function */
+	 "R_CKCORE_TLS_IE32",         /* name */
+	 FALSE,                       /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0xffffffff,                  /* dst_mask */
+	 TRUE),                       /* pcrel_offset */
+
+  /* 53: for pic nptl.  */
+  HOWTO (R_CKCORE_TLS_GD32,           /* type */
+	 0,                           /* rightshift */
+	 2,                           /* size */
+	 32,                          /* bitsize */
+	 FALSE,                       /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_dont,      /* complain_on_overflow */
+	 bfd_elf_generic_reloc,       /* special_function */
+	 "R_CKCORE_TLS_GD32",         /* name */
+	 FALSE,                       /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0xffffffff,                  /* dst_mask */
+	 TRUE),                       /* pcrel_offset */
+
+  /* 54: for pic nptl.  */
+  HOWTO (R_CKCORE_TLS_LDM32,          /* type */
+	 0,                           /* rightshift */
+	 2,                           /* size */
+	 32,                          /* bitsize */
+	 FALSE,                       /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_dont,      /* complain_on_overflow */
+	 bfd_elf_generic_reloc,       /* special_function */
+	 "R_CKCORE_TLS_LDM32",        /* name */
+	 FALSE,                       /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0xffffffff,                  /* dst_mask */
+	 TRUE),                       /* pcrel_offset */
+
+  /* 55: for pic nptl.  */
+  HOWTO (R_CKCORE_TLS_LDO32,          /* type */
+	 0,                           /* rightshift */
+	 2,                           /* size */
+	 32,                          /* bitsize */
+	 FALSE,                       /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_dont,      /* complain_on_overflow */
+	 bfd_elf_generic_reloc,       /* special_function */
+	 "R_CKCORE_TLS_LDO32",        /* name */
+	 FALSE,                       /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0xffffffff,                  /* dst_mask */
+	 TRUE),                       /* pcrel_offset */
+
+  /* 56: for linker.  */
+  HOWTO (R_CKCORE_TLS_DTPMOD32,0,0,0,0,0,0,0,"R_CKCORE_TLS_DTPMOD32",0,0,0,0),
+
+  /* 57: for linker.  */
+  HOWTO (R_CKCORE_TLS_DTPOFF32,0,0,0,0,0,0,0,"R_CKCORE_TLS_DTPOFF32",0,0,0,0),
+
+  /* 58: for linker.  */
+  HOWTO (R_CKCORE_TLS_TPOFF32,0,0,0,0,0,0,0,"R_CKCORE_TLS_TPOFF32",0,0,0,0),
+
+  /* 59: for ck807f.  */
+  HOWTO (R_CKCORE_PCREL_FLRW_IMM8BY4, /* type */
+	 2,                           /* rightshift */
+	 2,                           /* size */
+	 8,                           /* bitsize */
+	 TRUE,                        /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_bitfield,  /* complain_on_overflow */
+	 NULL,                        /* special_function */
+	 "R_CKCORE_PCREL_FLRW_IMM8BY4", /* name */
+	 FALSE,                       /* partial_inplace */
+	 0xfe1fff0f,                  /* src_mask */
+	 0x1e000f0,                   /* dst_mask */
+	 TRUE),                       /* pcrel_offset */
+
+  /* 60: for 810 not to generate jsri.  */
+  HOWTO (R_CKCORE_NOJSRI,             /* type */
+	 0,                           /* rightshift */
+	 2,                           /* size */
+	 32,                          /* bitsize */
+	 FALSE,                       /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_dont,      /* complain_on_overflow */
+	 bfd_elf_generic_reloc,       /* special_function */
+	 "R_CKCORE_NOJSRI",           /* name */
+	 FALSE,                       /* partial_inplace */
+	 0xffff,                      /* src_mask */
+	 0xffff,                      /* dst_mask */
+	 FALSE),                      /* pcrel_offset */
+
+  /* 61: for callgraph.  */
+  HOWTO (R_CKCORE_CALLGRAPH,          /* type */
+	 0,                           /* rightshift */
+	 0,                           /* size */
+	 0,                           /* bitsize */
+	 FALSE,                       /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_dont,      /* complain_on_overflow */
+	 NULL,                        /* special_function */
+	 "R_CKCORE_CALLGRAPH",        /* name */
+	 FALSE,                       /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0x0,                         /* dst_mask */
+	 TRUE),                       /* pcrel_offset */
+
+  /* 62: IRELATIVE*/
+  HOWTO (R_CKCORE_IRELATIVE,0,0,0,0,0,0,0,"R_CKCORE_IRELATIVE",0,0,0,0),
+
+  /* 63: for bloop instruction */
+  HOWTO (R_CKCORE_PCREL_BLOOP_IMM4BY4, /* type */
+	 1,                           /* rightshift */
+	 2,                           /* size */
+	 4,                           /* bitsize */
+	 1,                           /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_signed,    /* complain_on_overflow */
+	 bfd_elf_generic_reloc,       /* special_function */
+	 "R_CKCORE_PCREL_BLOOP_IMM4BY4", /* name */
+	 FALSE,                       /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0xf,                         /* dst_mask */
+	 TRUE),                       /* pcrel_offset */
+  /* 64: for bloop instruction */
+  HOWTO (R_CKCORE_PCREL_BLOOP_IMM12BY4, /* type */
+	 1,                           /* rightshift */
+	 2,                           /* size */
+	 12,                          /* bitsize */
+	 1,                           /* pc_relative */
+	 0,                           /* bitpos */
+	 complain_overflow_signed,    /* complain_on_overflow */
+	 bfd_elf_generic_reloc,       /* special_function */
+	 "R_CKCORE_PCREL_BLOOP_IMM12BY4", /* name */
+	 FALSE,                       /* partial_inplace */
+	 0x0,                         /* src_mask */
+	 0xfff,                       /* dst_mask */
+	 TRUE),                       /* pcrel_offset */
+
+
+};
+
+
+/* Whether GOT overflow checking is needed.  */
+static int check_got_overflow = 0;
+
+/* Whether the target 32 bits is forced so that the high
+   16 bits is at the low address.  */
+static int need_reverse_bits;
+
+/* Used for relaxation.  See csky_relocate_contents.  */
+static bfd_vma read_content_substitute;
+
+/* NOTICE!
+   The way the following two look-up functions work demands
+   that BFD_RELOC_CKCORE_xxx are defined contiguously.  */
+static reloc_howto_type *
+csky_elf_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
+			    bfd_reloc_code_real_type code)
+{
+  int csky_code = code - BFD_RELOC_CKCORE_NONE;
+
+  if (csky_code < 0 || csky_code >= R_CKCORE_MAX)
+    {
+      switch (code)
+	{
+	case BFD_RELOC_NONE:
+	  csky_code = R_CKCORE_NONE;
+	  break;
+	case BFD_RELOC_32:
+	  csky_code = R_CKCORE_ADDR32;
+	  break;
+	case BFD_RELOC_32_PCREL:
+	  csky_code = R_CKCORE_PCREL32;
+	  break;
+	case BFD_RELOC_VTABLE_INHERIT:
+	  csky_code = R_CKCORE_GNU_VTINHERIT;
+	  break;
+	case BFD_RELOC_VTABLE_ENTRY:
+	  csky_code = R_CKCORE_GNU_VTENTRY;
+	  break;
+	case BFD_RELOC_RVA:
+	  csky_code = R_CKCORE_RELATIVE;
+	  break;
+	default:
+	  return (reloc_howto_type *)NULL;
+	}
+    }
+  /* Note: when adding csky bfd reloc types in bfd-in2.h
+     and csky elf reloc types in elf/csky.h,
+     the order of the two reloc type tables should be consistent.  */
+  return &csky_elf_howto_table[csky_code];
+}
+
+static reloc_howto_type *
+csky_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
+			    const char *r_name)
+{
+  unsigned int i;
+  for (i = 0; i < R_CKCORE_MAX; i++)
+    if (strcasecmp (csky_elf_howto_table[i].name, r_name) == 0)
+      return &csky_elf_howto_table[i];
+  return NULL;
+}
+
+static reloc_howto_type *
+elf32_csky_howto_from_type (unsigned int r_type)
+{
+  if (r_type < R_CKCORE_MAX)
+    return &csky_elf_howto_table[r_type];
+  else
+    return NULL;
+}
+
+static bfd_boolean
+csky_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
+			arelent *cache_ptr,
+			Elf_Internal_Rela *dst)
+{
+  unsigned int r_type;
+  r_type = ELF32_R_TYPE (dst->r_info);
+  cache_ptr->howto = elf32_csky_howto_from_type (r_type);
+  if (cache_ptr->howto == NULL)
+    {
+      /* xgettext:c-format */
+      _bfd_error_handler (_("error: %pB: unsupported relocation type %#x"),
+	 abfd, r_type);
+      bfd_set_error (bfd_error_bad_value);
+      return FALSE;
+    }
+  return TRUE;
+}
+
+/* The Global Offset Table max size.  */
+#define GOT_MAX_SIZE 0xFFFF8
+
+/* The name of the dynamic interpreter.  This is put in the .interp
+   section.  */
+#define ELF_DYNAMIC_INTERPRETER     "/usr/lib/ld.so.1"
+
+/* The size in bytes of an entry in the procedure linkage table.  */
+#define PLT_ENTRY_SIZE      12
+#define PLT_ENTRY_SIZE_P    16
+
+/* The first entry in a procedure linkage table looks like
+   this.  It is set up so that any shared library function that is
+   called before the relocation has been set up calls the dynamic
+   linker first.  */
+static const bfd_vma csky_elf_plt_entry_v2[PLT_ENTRY_SIZE / 4] =
+{
+  0xd99c2002,  /* ldw r12, (gb, 8)  */
+  0xea0d0000,  /* movi r13,offset   */
+  0xe8cc0000   /* jmp r12           */
+};
+
+static const bfd_vma csky_elf_plt_entry_v1[PLT_ENTRY_SIZE / 2 ] =
+  {
+    0x25f0,  /* subi r0, 32       */
+    0x9200,  /* stw r2, (r0, 0)   */
+    0x9310,  /* stw r3, (r0, 4)   */
+    0x822e,  /* ldw r2, (gb, 8)   */
+    0x7301,  /* lrw r3, #offset   */
+    0x00c2,  /* jmp r2            */
+  };
+
+/* Branch stub support.  */
+
+enum stub_insn_type
+{
+  INSN16,
+  INSN32,
+  DATA_TYPE
+};
+
+bfd_boolean use_branch_stub = TRUE;
+typedef struct
+{
+  bfd_vma data;
+  enum stub_insn_type type;
+  unsigned int r_type;
+  int reloc_addend;
+} insn_sequence;
+
+static const insn_sequence elf32_csky_stub_long_branch[] =
+{
+    {0xea8d0002, INSN32,    R_CKCORE_NONE,   0x0},   /* lrw t1,[pc+8] */
+    {0x7834,     INSN16,    R_CKCORE_NONE,   0x0},   /* jmp t1 */
+    {0x6c03,     INSN16,    R_CKCORE_NONE,   0x0},   /* nop */
+    {0x0,        DATA_TYPE, R_CKCORE_ADDR32, 0x0}    /* .long addr*/
+};
+
+static const insn_sequence elf32_csky_stub_long_branch_jmpi[] =
+{
+    {0xeac00001, INSN32,    R_CKCORE_NONE,   0x0},   /* jmpi [pc+4] */
+    {0x0,        DATA_TYPE, R_CKCORE_ADDR32, 0x0}    /* .long addr*/
+};
+
+/* The bsr instruction offset limit.  */
+#define BSR_MAX_FWD_BRANCH_OFFSET       (((1 << 25) - 1) << 1)
+#define BSR_MAX_BWD_BRANCH_OFFSET       (-(1 << 26))
+
+#define STUB_SUFFIX ".stub"
+#define STUB_ENTRY_NAME "__%s_veneer"
+
+/* One entry per long/short branch stub defined above.  */
+#define DEF_STUBS \
+  DEF_STUB(long_branch) \
+  DEF_STUB(long_branch_jmpi)
+
+#define DEF_STUB(x) csky_stub_##x,
+enum elf32_csky_stub_type
+{
+  csky_stub_none,
+  DEF_STUBS
+};
+#undef DEF_STUB
+
+typedef struct
+{
+  const insn_sequence* template_sequence;
+  int template_size;
+} stub_def;
+
+#define DEF_STUB(x) {elf32_csky_stub_##x, ARRAY_SIZE(elf32_csky_stub_##x)},
+static const stub_def stub_definitions[] = {
+  {NULL, 0},
+  DEF_STUBS
+};
+
+/* The size of the thread control block.  */
+#define TCB_SIZE        8
+
+struct csky_elf_obj_tdata
+{
+  struct elf_obj_tdata root;
+
+  /* tls_type for each local got entry.  */
+  char *local_got_tls_type;
+};
+
+#define csky_elf_local_got_tls_type(bfd) \
+  (csky_elf_tdata (bfd)->local_got_tls_type)
+
+#define csky_elf_tdata(bfd) \
+  ((struct csky_elf_obj_tdata *) (bfd)->tdata.any)
+
+struct elf32_csky_stub_hash_entry
+{
+  /* Base hash table entry structure.  */
+  struct bfd_hash_entry root;
+
+  /* The stub section.  */
+  asection *stub_sec;
+
+  /* Offset within stub_sec of the beginning of this stub.  */
+  bfd_vma stub_offset;
+
+  /* Given the symbol's value and its section we can determine its final
+     value when building the stubs (so the stub knows where to jump).  */
+  bfd_vma target_value;
+  asection *target_section;
+
+    /* Offset to apply to relocation referencing target_value.  */
+  bfd_vma target_addend;
+
+  /* The stub type.  */
+  enum elf32_csky_stub_type stub_type;
+  /* Its encoding size in bytes.  */
+  int stub_size;
+  /* Its template.  */
+  const insn_sequence *stub_template;
+  /* The size of the template (number of entries).  */
+  int stub_template_size;
+
+  /* The symbol table entry, if any, that this was derived from.  */
+  struct csky_elf_link_hash_entry *h;
+
+  /* Destination symbol type.  */
+  unsigned char st_type;
+
+  /* Where this stub is being called from, or, in the case of combined
+     stub sections, the first input section in the group.  */
+  asection *id_sec;
+
+  /* The name for the local symbol at the start of this stub.  The
+     stub name in the hash table has to be unique; this does not, so
+     it can be friendlier.  */
+  char *output_name;
+};
+
+#define csky_stub_hash_lookup(table, string, create, copy) \
+  ((struct elf32_csky_stub_hash_entry *) \
+   bfd_hash_lookup ((table), (string), (create), (copy)))
+
+/* C-SKY ELF linker hash entry.  */
+struct csky_elf_link_hash_entry
+{
+  struct elf_link_hash_entry elf;
+  int plt_refcount;
+  /* For sub jsri2bsr relocs count.  */
+  int jsri2bsr_refcount;
+  /* Track dynamic relocs copied for this symbol.  */
+  struct elf_dyn_relocs *dyn_relocs;
+
+#define GOT_UNKNOWN     0
+#define GOT_NORMAL      1
+#define GOT_TLS_GD      2
+#define GOT_TLS_IE      4
+
+  unsigned char tls_type;
+
+  /* A pointer to the most recently used stub hash entry against this
+     symbol.  */
+  struct elf32_csky_stub_hash_entry *stub_cache;
+};
+
+/* Traverse an C-SKY ELF linker hash table.  */
+#define csky_elf_link_hash_traverse(table, func, info)                     \
+  (elf_link_hash_traverse                                                  \
+   (&(table)->root,                                                        \
+    (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
+    (info)))
+
+/* Get the C-SKY ELF linker hash table from a link_info structure.  */
+#define csky_elf_hash_table(info) \
+  ((elf_hash_table_id  ((struct elf_link_hash_table *) ((info)->hash))	\
+    == CSKY_ELF_DATA)							\
+   ? ((struct csky_elf_link_hash_table *) ((info)->hash))		\
+   : NULL)
+
+#define csky_elf_hash_entry(ent)  ((struct csky_elf_link_hash_entry*)(ent))
+
+/* Array to keep track of which stub sections have been created, and
+   information on stub grouping.  */
+struct map_stub
+{
+  /* This is the section to which stubs in the group will be
+     attached.  */
+  asection *link_sec;
+  /* The stub section.  */
+  asection *stub_sec;
+};
+
+/* C-SKY ELF linker hash table.  */
+struct csky_elf_link_hash_table
+{
+  struct elf_link_hash_table elf;
+
+  /* Small local sym cache.  */
+  struct sym_cache sym_cache;
+
+  /* Data for R_CKCORE_TLS_LDM32 relocations.  */
+  union
+  {
+    bfd_signed_vma refcount;
+    bfd_vma offset;
+  } tls_ldm_got;
+
+  /* The stub hash table.  */
+  struct bfd_hash_table stub_hash_table;
+
+  /* Linker stub bfd.  */
+  bfd *stub_bfd;
+
+  /* Linker call-backs.  */
+  asection * (*add_stub_section) (const char *, asection *);
+  void (*layout_sections_again) (void);
+
+  /* Array to keep track of which stub sections have been created, and
+   * information on stub grouping.  */
+  struct map_stub *stub_group;
+
+  /* Number of elements in stub_group.  */
+  unsigned int top_id;
+
+  /* Assorted information used by elf32_csky_size_stubs.  */
+  unsigned int bfd_count;
+  unsigned int top_index;
+  asection **input_list;
+};
+
+
+
+/* We can't change vectors in the bfd target which will apply to
+   data sections, however we only do this to the text sections.  */
+static bfd_vma
+csky_get_insn_32 (bfd *input_bfd,
+		  bfd_byte *location)
+{
+  if (bfd_big_endian (input_bfd))
+    return bfd_get_32 (input_bfd, location);
+  else
+    return (bfd_get_16 (input_bfd, location) << 16
+	    | bfd_get_16 (input_bfd, location + 2));
+}
+
+static void
+csky_put_insn_32 (bfd *input_bfd,
+		  bfd_vma x,
+		  bfd_byte *location)
+{
+  if (bfd_big_endian (input_bfd))
+    bfd_put_32 (input_bfd, x, location);
+  else
+    {
+      bfd_put_16 (input_bfd, x >> 16, location);
+      bfd_put_16 (input_bfd, x & 0xffff, location + 2);
+    }
+}
+
+/* Find or create a stub section.  Returns a pointer to the stub section, and
+ * the section to which the stub section will be attached (in *LINK_SEC_P).
+ * LINK_SEC_P may be NULL.  */
+static asection *
+elf32_csky_create_or_find_stub_sec (asection **link_sec_p, asection *section,
+				    struct csky_elf_link_hash_table *htab)
+{
+  asection *link_sec;
+  asection *stub_sec;
+
+  link_sec = htab->stub_group[section->id].link_sec;
+  stub_sec = htab->stub_group[section->id].stub_sec;
+  if (stub_sec == NULL)
+    {
+      stub_sec = htab->stub_group[link_sec->id].stub_sec;
+      if (stub_sec == NULL)
+	{
+	  size_t namelen;
+	  bfd_size_type len;
+	  char *s_name;
+	  
+	  namelen = strlen (link_sec->name);
+	  len = namelen + sizeof (STUB_SUFFIX);
+	  s_name = bfd_alloc (htab->stub_bfd, len);
+	  if (s_name == NULL)
+	    return NULL;
+	  
+	  memcpy (s_name, link_sec->name, namelen);
+	  memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
+	  stub_sec = (*htab->add_stub_section) (s_name, link_sec);
+	  if (stub_sec == NULL)
+	    return NULL;
+	  htab->stub_group[link_sec->id].stub_sec = stub_sec;
+	}
+      htab->stub_group[section->id].stub_sec = stub_sec;
+    }
+
+  if (link_sec_p)
+    *link_sec_p = link_sec;
+
+  return stub_sec;
+}
+
+/* Build a name for an entry in the stub hash table.  */
+static char *
+elf32_csky_stub_name (const asection *input_section,
+		      const asection *sym_sec,
+		      const struct csky_elf_link_hash_entry *hash,
+		      const Elf_Internal_Rela *rel)
+{
+  char *stub_name;
+  bfd_size_type len;
+
+  if (hash)
+    {
+      len = 8 + 1 + strlen (hash->elf.root.root.string) + 1 + 8 + 1;
+      stub_name = bfd_malloc (len);
+      if (stub_name != NULL)
+	sprintf (stub_name, "%08x_%s+%x",
+		 input_section->id & 0xffffffff,
+		 hash->elf.root.root.string,
+		 (int) rel->r_addend & 0xffffffff);
+    }
+  else
+    {
+      len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
+      stub_name = bfd_malloc (len);
+      if (stub_name != NULL)
+	sprintf (stub_name, "%08x_%x:%x+%x",
+		 input_section->id & 0xffffffff,
+		 sym_sec->id & 0xffffffff,
+		 (int) ELF32_R_SYM (rel->r_info) & 0xffffffff,
+		 (int) rel->r_addend & 0xffffffff);
+    }
+
+  return stub_name;
+}
+
+/* Determine the type of stub needed, if any, for a call.  */
+
+static enum elf32_csky_stub_type
+csky_type_of_stub (struct bfd_link_info *info,
+		   asection *input_sec,
+		   const Elf_Internal_Rela *rel,
+		   unsigned char st_type,
+		   struct csky_elf_link_hash_entry *hash,
+		   bfd_vma destination,
+		   asection *sym_sec ATTRIBUTE_UNUSED,
+		   bfd *input_bfd ATTRIBUTE_UNUSED,
+		   const char *name ATTRIBUTE_UNUSED)
+{
+  bfd_vma location;
+  bfd_signed_vma branch_offset;
+  unsigned int r_type;
+  enum elf32_csky_stub_type stub_type = csky_stub_none;
+  struct elf_link_hash_entry * h = &hash->elf;
+
+  /* We don't know the actual type of destination in case it is of
+     type STT_SECTION: give up.  */
+  if (st_type == STT_SECTION)
+    return stub_type;
+
+  location = (input_sec->output_offset
+	      + input_sec->output_section->vma
+	      + rel->r_offset);
+
+  branch_offset = (bfd_signed_vma)(destination - location);
+  r_type = ELF32_R_TYPE (rel->r_info);
+  if (r_type == R_CKCORE_PCREL_IMM26BY2
+      && ((h != NULL
+	   && ((h->def_dynamic && !h->def_regular)
+	       || (bfd_link_pic (info)
+		   && h->root.type == bfd_link_hash_defweak)))
+	  || branch_offset > BSR_MAX_FWD_BRANCH_OFFSET
+	  || branch_offset < BSR_MAX_BWD_BRANCH_OFFSET))
+    {
+      if (bfd_csky_arch (info->output_bfd) == CSKY_ARCH_810
+	  || bfd_csky_arch (info->output_bfd) ==  CSKY_ARCH_807)
+	stub_type = csky_stub_long_branch_jmpi;
+      else
+	stub_type = csky_stub_long_branch;
+    }
+
+  return stub_type;
+}
+
+
+/* Create an entry in an C-SKY ELF linker hash table.  */
+
+static struct bfd_hash_entry *
+csky_elf_link_hash_newfunc (struct bfd_hash_entry * entry,
+			    struct bfd_hash_table * table,
+			    const char * string)
+{
+  struct csky_elf_link_hash_entry * ret =
+      (struct csky_elf_link_hash_entry *) entry;
+
+  /* Allocate the structure if it has not already been allocated by a
+     subclass.  */
+  if (ret == NULL)
+    {
+      ret = (struct csky_elf_link_hash_entry *)
+	bfd_hash_allocate (table,
+			   sizeof (struct csky_elf_link_hash_entry));
+      if (ret == NULL)
+	return (struct bfd_hash_entry *) ret;
+    }
+
+  /* Call the allocation method of the superclass.  */
+  ret = ((struct csky_elf_link_hash_entry *)
+	 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *)ret,
+				     table, string));
+  if (ret != NULL)
+    {
+      struct csky_elf_link_hash_entry *eh;
+
+      eh = (struct csky_elf_link_hash_entry *) ret;
+      eh->dyn_relocs = NULL;
+      eh->plt_refcount = 0;
+      eh->jsri2bsr_refcount = 0;
+      eh->tls_type = GOT_NORMAL;
+      ret->stub_cache = NULL;
+    }
+
+  return (struct bfd_hash_entry *) ret;
+}
+
+/* Initialize an entry in the stub hash table.  */
+
+static struct bfd_hash_entry *
+stub_hash_newfunc (struct bfd_hash_entry *entry,
+		   struct bfd_hash_table *table,
+		   const char *string)
+{
+  /* Allocate the structure if it has not already been allocated by a
+     subclass.  */
+  if (entry == NULL)
+    {
+      entry = ((struct bfd_hash_entry *)
+	       bfd_hash_allocate (table,
+				  sizeof (struct elf32_csky_stub_hash_entry)));
+      if (entry == NULL)
+	return entry;
+    }
+
+  /* Call the allocation method of the superclass.  */
+  entry = bfd_hash_newfunc (entry, table, string);
+  if (entry != NULL)
+    {
+      struct elf32_csky_stub_hash_entry *eh;
+
+      /* Initialize the local fields.  */
+      eh = (struct elf32_csky_stub_hash_entry *) entry;
+      eh->stub_sec = NULL;
+      eh->stub_offset = 0;
+      eh->target_value = 0;
+      eh->target_section = NULL;
+      eh->target_addend = 0;
+      eh->stub_type = csky_stub_none;
+      eh->stub_size = 0;
+      eh->stub_template = NULL;
+      eh->stub_template_size = -1;
+      eh->h = NULL;
+      eh->id_sec = NULL;
+      eh->output_name = NULL;
+    }
+
+  return entry;
+}
+
+/* Free the derived linker hash table.  */
+
+static void
+csky_elf_link_hash_table_free (bfd *obfd)
+{
+  struct csky_elf_link_hash_table *ret
+    = (struct csky_elf_link_hash_table *) obfd->link.hash;
+
+  bfd_hash_table_free (&ret->stub_hash_table);
+  _bfd_elf_link_hash_table_free (obfd);
+}
+
+/* Create an CSKY elf linker hash table.  */
+
+static struct bfd_link_hash_table *
+csky_elf_link_hash_table_create (bfd *abfd)
+{
+  struct csky_elf_link_hash_table *ret;
+  bfd_size_type amt = sizeof (struct csky_elf_link_hash_table);
+
+  ret = (struct csky_elf_link_hash_table*) bfd_zmalloc (amt);
+  if (ret == NULL)
+    return NULL;
+
+  if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
+				      csky_elf_link_hash_newfunc,
+				      sizeof (struct csky_elf_link_hash_entry),
+				      CSKY_ELF_DATA))
+    {
+      free (ret);
+      return NULL;
+    }
+
+  if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc,
+			    sizeof (struct elf32_csky_stub_hash_entry)))
+    {
+      free (ret);
+      return NULL;
+    }
+  ret->elf.root.hash_table_free = csky_elf_link_hash_table_free;
+  return &ret->elf.root;
+}
+
+static bfd_boolean
+csky_elf_mkobject (bfd *abfd)
+{
+  return bfd_elf_allocate_object (abfd, sizeof (struct csky_elf_obj_tdata),
+				  CSKY_ELF_DATA);
+}
+
+/* Adjust a symbol defined by a dynamic object and referenced by a
+   regular object.  The current definition is in some section of the
+   dynamic object, but we're not including those sections.  We have to
+   change the definition to something the rest of the link can
+   understand.  */
+
+static bfd_boolean
+csky_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
+				struct elf_link_hash_entry *h)
+{
+  struct csky_elf_link_hash_entry *eh;
+  eh = (struct csky_elf_link_hash_entry *)h;
+  if (eh == NULL)
+    return FALSE;
+
+  /* Clear jsri2bsr_refcount, if creating shared library files.  */
+  if (bfd_link_pic (info) && eh->jsri2bsr_refcount > 0)
+    eh->jsri2bsr_refcount = 0;
+
+  /* If there is a function, put it in the procedure linkage table. We
+     will fill in the contents of the procedure linkage table later.  */
+  if (h->needs_plt)
+    {
+      /* Calls to STT_GNU_IFUNC symbols always use a PLT, even if the
+	 symbol binds locally.  */
+      if (h->plt.refcount <= 0
+	  || (h->type != STT_GNU_IFUNC
+	      && (SYMBOL_CALLS_LOCAL (info, h)
+		  || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
+		      && h->root.type == bfd_link_hash_undefweak))))
+
+	{
+	  /* This case can occur if we saw a PLT32 reloc in an input
+	     file, but the symbol was never referred to by a dynamic
+	     object, or if all references were garbage collected.  In
+	     such a case, we don't actually need to build a procedure
+	     linkage table, and we can just do a PC32 reloc instead.  */
+	  h->plt.offset = (bfd_vma) -1;
+	  h->needs_plt = 0;
+	  if (h->got.refcount == 0)
+	    h->got.refcount += 1;
+	}
+      else if (h->got.refcount != 0)
+	{
+	  h->got.refcount -= eh->plt_refcount;
+	  eh->plt_refcount = 0;
+	}
+      return TRUE;
+    }
+  else
+    /* It's possible that we incorrectly decided a .plt reloc was
+       needed for an R_CKCORE_PC32 or similar reloc to a non-function
+       sym in check_relocs.  We can't decide accurately between function
+       and non-function syms in check_relocs; objects loaded later in
+       the link may change h->type.  So fix it now.  */
+    h->plt.offset = (bfd_vma) -1;
+
+  /* If this is a weak symbol, and there is a real definition, the
+     processor independent code will have arranged for us to see the
+     real definition first, and we can just use the same value.  */
+  if (h->is_weakalias)
+    {
+      struct elf_link_hash_entry *def = weakdef (h);
+      BFD_ASSERT (def->root.type == bfd_link_hash_defined);
+      h->root.u.def.section = def->root.u.def.section;
+      h->root.u.def.value = def->root.u.def.value;
+      return TRUE;
+    }
+
+  /* This is a reference to a symbol defined by a dynamic object which
+     is not a function.  */
+
+  /* If we are creating a shared library, we must presume that the
+     only references to the symbol are via the global offset table.
+     For such cases we need not do anything here; the relocations will
+     be handled correctly by relocate_section.  */
+  if (bfd_link_pic (info))
+    return TRUE;
+
+  h->non_got_ref = 0;
+  return TRUE;
+}
+
+/* Allocate space in .plt, .got and associated reloc sections for
+   dynamic relocs.  */
+
+static bfd_boolean
+csky_allocate_dynrelocs (struct elf_link_hash_entry *h, PTR inf)
+{
+  struct bfd_link_info *info;
+  struct csky_elf_link_hash_table *htab;
+  struct csky_elf_link_hash_entry *eh;
+  struct elf_dyn_relocs *p;
+
+  /* For indirect case, such as _ZdlPv to _ZdlPv@@GLIBCXX_3.4.  */
+  if (h->root.type == bfd_link_hash_indirect)
+    return TRUE;
+
+  if (h->root.type == bfd_link_hash_warning)
+    h = (struct elf_link_hash_entry *) h->root.u.i.link;
+
+
+  info = (struct bfd_link_info *) inf;
+  htab = csky_elf_hash_table (info);
+  if (htab == NULL)
+    return FALSE;
+  /*TODO: how to deal with weak symbol relocs.  */
+  if ((htab->elf.dynamic_sections_created || h->type == STT_GNU_IFUNC)
+      && h->plt.refcount > 0)
+    {
+      /* Make sure this symbol is output as a dynamic symbol.
+	 Undefined weak syms won't yet be marked as dynamic.  */
+      if (h->dynindx == -1
+	  && !h->forced_local
+	  && !bfd_elf_link_record_dynamic_symbol (info, h))
+	return FALSE;
+      if (bfd_link_pic (info) || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
+	{
+	  asection *splt = htab->elf.splt;
+
+	  /* If this is the first .plt entry, make room for the special
+	     first entry.  */
+	  if (splt->size == 0)
+	    {
+	      if (bfd_csky_abi (info->output_bfd) ==  CSKY_ABI_V1)
+		splt->size += PLT_ENTRY_SIZE_P;
+	      else
+		splt->size += PLT_ENTRY_SIZE;
+	    }
+	  h->plt.offset = splt->size;
+
+	  /* If this symbol is not defined in a regular file, and we are
+	     not generating a shared library, then set the symbol to this
+	     location in the .plt.  This is required to make function
+	     pointers compare as equal between the normal executable and
+	     the shared library.  */
+	  if (!bfd_link_pic (info) && !h->def_regular)
+	    {
+	      h->root.u.def.section = splt;
+	      h->root.u.def.value = h->plt.offset;
+	    }
+
+	  /* Make room for this entry.  */
+	  if (bfd_csky_abi (info->output_bfd) ==  CSKY_ABI_V1)
+	    splt->size += PLT_ENTRY_SIZE_P;
+	  else
+	    splt->size += PLT_ENTRY_SIZE;
+	  /* We also need to make an entry in the .rela.plt section.  */
+	  htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
+
+	  /* We also need to make an entry in the .got.plt section, which
+	     will be placed in the .got section by the linker script.  */
+	  htab->elf.sgotplt->size += 4;
+	}
+      else
+	{
+	  h->plt.offset = (bfd_vma) -1;
+	  h->needs_plt = 0;
+	}
+    }
+  else
+    {
+      h->plt.offset = (bfd_vma) -1;
+      h->needs_plt = 0;
+    }
+
+  if (h->got.refcount > 0)
+    {
+      asection *sgot;
+      bfd_boolean dyn;
+      int indx;
+
+      int tls_type = csky_elf_hash_entry (h)->tls_type;
+      /* Make sure this symbol is output as a dynamic symbol.
+	 Undefined weak syms won't yet be marked as dynamic.  */
+      if (h->dynindx == -1
+	  && !h->forced_local
+	  && !bfd_elf_link_record_dynamic_symbol (info, h))
+	return FALSE;
+
+      sgot = htab->elf.sgot;
+      h->got.offset = sgot->size;
+      BFD_ASSERT (tls_type != GOT_UNKNOWN);
+      if (tls_type == GOT_NORMAL)
+	/* Non-TLS symbols need one GOT slot.  */
+	sgot->size += 4;
+      else
+	{
+	  if (tls_type & GOT_TLS_GD)
+	    /* R_CKCORE_TLS_GD32 needs 2 consecutive GOT slots.  */
+	    sgot->size += 8;
+	  if (tls_type & GOT_TLS_IE)
+	    /* R_CKCORE_TLS_IE32 needs one GOT slot.  */
+	    sgot->size += 4;
+	}
+      dyn = htab->elf.dynamic_sections_created;
+      indx = 0;
+      if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)
+	  && (! bfd_link_pic (info) || !SYMBOL_REFERENCES_LOCAL (info, h)))
+	indx = h->dynindx;
+
+      if (tls_type != GOT_NORMAL
+	  && (bfd_link_pic (info) || indx != 0)
+	  && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
+	       && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
+	      || h->root.type != bfd_link_hash_undefweak))
+	{
+	  if (tls_type & GOT_TLS_IE)
+	    htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
+	  if (tls_type & GOT_TLS_GD)
+	    htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
+	  if ((tls_type & GOT_TLS_GD) && indx != 0)
+	    htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
+	}
+      else if (((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
+		 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
+		|| h->root.type != bfd_link_hash_undefweak)
+	       && (bfd_link_pic (info)
+		   || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
+	htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
+    }
+  else
+    h->got.offset = (bfd_vma) -1;
+
+  eh = (struct csky_elf_link_hash_entry *) h;
+  if (eh->dyn_relocs == NULL)
+    return TRUE;
+
+  /* In the shared -Bsymbolic case, discard space allocated for
+     dynamic pc-relative relocs against symbols which turn out to be
+     defined in regular objects.  For the normal shared case, discard
+     space for pc-relative relocs that have become local due to symbol
+     visibility changes.  */
+
+  if (bfd_link_pic (info))
+    {
+      if (SYMBOL_CALLS_LOCAL (info, h))
+	{
+	  struct elf_dyn_relocs **pp;
+
+	  for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
+	    {
+	      p->count -= p->pc_count;
+	      p->pc_count = 0;
+	      if (p->count == 0)
+		*pp = p->next;
+	      else
+		pp = &p->next;
+	    }
+	}
+
+      if (eh->jsri2bsr_refcount
+	  && h->root.type == bfd_link_hash_defined
+	  && eh->dyn_relocs != NULL)
+	eh->dyn_relocs->count -= eh->jsri2bsr_refcount;
+
+      /* Also discard relocs on undefined weak syms with non-default
+	 visibility.  */
+      if (eh->dyn_relocs != NULL
+	  && h->root.type == bfd_link_hash_undefweak)
+	{
+	  if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
+	      || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
+	    eh->dyn_relocs = NULL;
+
+	  /* Make sure undefined weak symbols are output as a dynamic
+	     symbol in PIEs.  */
+	  else if (h->dynindx == -1
+		   && !h->forced_local
+		   && !bfd_elf_link_record_dynamic_symbol (info, h))
+	    return FALSE;
+	}
+
+    }
+  else
+    {
+      /* For the non-shared case, discard space for relocs against
+	 symbols which turn out to need copy relocs or are not
+	 dynamic.  */
+
+      if (!h->non_got_ref
+	  && ((h->def_dynamic && !h->def_regular)
+	      || (htab->elf.dynamic_sections_created
+		  && (h->root.type == bfd_link_hash_undefweak
+		      || h->root.type == bfd_link_hash_indirect
+		      || h->root.type == bfd_link_hash_undefined))))
+	{
+	  /* Make sure this symbol is output as a dynamic symbol.
+	     Undefined weak syms won't yet be marked as dynamic.  */
+	  if (h->dynindx == -1
+	      && !h->forced_local
+	      && !bfd_elf_link_record_dynamic_symbol (info, h))
+	    return FALSE;
+
+	  /* If that succeeded, we know we'll be keeping all the
+	     relocs.  */
+	  if (h->dynindx != -1)
+	    goto keep;
+	}
+
+      eh->dyn_relocs = NULL;
+
+      keep: ;
+    }
+
+  /* Finally, allocate space.  */
+  for (p = eh->dyn_relocs; p != NULL; p = p->next)
+    {
+      asection *srelgot = htab->elf.srelgot;
+      srelgot->size += p->count * sizeof (Elf32_External_Rela);
+    }
+
+  return TRUE;
+}
+
+/* Find any dynamic relocs that apply to read-only sections.  */
+
+static bfd_boolean
+csky_readonly_dynrelocs (struct elf_link_hash_entry *h, PTR inf)
+{
+  struct csky_elf_link_hash_entry *eh;
+  struct elf_dyn_relocs *p;
+
+  eh = (struct csky_elf_link_hash_entry *) h;
+  for (p = eh->dyn_relocs; p != NULL; p = p->next)
+    {
+      asection *s = p->sec->output_section;
+
+      if (s != NULL && (s->flags & SEC_READONLY) != 0)
+	{
+	  struct bfd_link_info *info = (struct bfd_link_info *) inf;
+	  /* DF_TEXTREL flag means there is at least one relocation in
+	     read-only sections; it may modify those sections
+	     when relocating.  */
+	  info->flags |= DF_TEXTREL;
+
+	  /* Not an error, just cut short the traversal.  */
+	  return FALSE;
+	}
+    }
+  return TRUE;
+}
+
+/* Set the sizes of the dynamic sections.  */
+
+static bfd_boolean
+csky_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
+				struct bfd_link_info *info)
+{
+  struct csky_elf_link_hash_table *htab;
+  bfd *dynobj;
+  asection *s;
+  bfd_boolean relocs;
+  bfd *ibfd;
+
+  htab = csky_elf_hash_table (info);
+  if (htab == NULL)
+    return FALSE;
+  dynobj = htab->elf.dynobj;
+  if (dynobj == NULL)
+    return FALSE;
+
+  if (htab->elf.dynamic_sections_created)
+    {
+      /* Set the contents of the .interp section to the interpreter.  */
+      if (!bfd_link_pic (info) && !info->nointerp)
+	{
+	  s = bfd_get_section_by_name (dynobj, ".interp");
+	  BFD_ASSERT (s != NULL);
+	  s->size = sizeof ELF_DYNAMIC_INTERPRETER;
+	  s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
+	}
+    }
+
+  /* Set up .got offsets for local syms, and space for local dynamic
+     relocs.  */
+  for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
+    {
+      bfd_signed_vma *local_got_refcounts;
+      bfd_signed_vma *end_local_got;
+      bfd_size_type locsymcount;
+      Elf_Internal_Shdr *symtab_hdr;
+      asection *srelgot, *sgot;
+      char *local_tls_type;
+
+      if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
+	continue;
+
+      sgot = htab->elf.sgot;
+      srelgot = htab->elf.srelgot;
+
+      for (s = ibfd->sections; s != NULL; s = s->next)
+	{
+	  struct elf_dyn_relocs *p;
+
+	  for (p = *((struct elf_dyn_relocs **)
+		     &elf_section_data (s)->local_dynrel);
+	       p != NULL;
+	       p = p->next)
+	    {
+	      if (!bfd_is_abs_section (p->sec)
+		  && bfd_is_abs_section (p->sec->output_section))
+		/* Input section has been discarded, either because
+		   it is a copy of a linkonce section or due to
+		   linker script /DISCARD/, so we'll be discarding
+		   the relocs too.  */
+		;
+	      else if (p->count != 0)
+		{
+		  srelgot->size += p->count * sizeof (Elf32_External_Rela);
+		  if ((p->sec->output_section->flags & SEC_READONLY) != 0)
+		    info->flags |= DF_TEXTREL;
+		}
+	    }
+	}
+
+      local_got_refcounts = elf_local_got_refcounts (ibfd);
+      if (!local_got_refcounts)
+	continue;
+
+      symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
+      locsymcount = symtab_hdr->sh_info;
+      end_local_got = local_got_refcounts + locsymcount;
+      local_tls_type = csky_elf_local_got_tls_type (ibfd);
+
+      for (; local_got_refcounts < end_local_got;
+	   ++local_got_refcounts, ++local_tls_type)
+	{
+	  if (*local_got_refcounts > 0)
+	    {
+	      /* GOT_TLS_GD and GOT_TLS_IE type for TLS, GOT_NORMAL type
+		 for GOT.  If output file is shared library, we should output
+		 GOT_TLS_GD type relocation in .rel.got.  */
+	      *local_got_refcounts = sgot->size;
+	      if (*local_tls_type & GOT_TLS_GD)
+		/* TLS_GD relocs need an 8-byte structure in the GOT.  */
+		sgot->size += 8;
+	      if (*local_tls_type & GOT_TLS_IE)
+		sgot->size += 4;
+	      if (*local_tls_type == GOT_NORMAL)
+		sgot->size += 4;
+	      if (bfd_link_pic (info) || *local_tls_type == GOT_TLS_GD)
+		srelgot->size += sizeof (Elf32_External_Rela);
+	    }
+	  else
+	    *local_got_refcounts = (bfd_vma) -1;
+	}
+    }
+
+  if (htab->tls_ldm_got.refcount > 0)
+    {
+      /* Allocate two GOT entries and one dynamic relocation (if necessary)
+	 for R_CSKY_TLS_LDM32 relocations.  */
+      htab->tls_ldm_got.offset = htab->elf.sgot->size;
+      htab->elf.sgot->size += 8;
+      if (bfd_link_pic (info))
+	htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
+    }
+  else
+    htab->tls_ldm_got.offset = -1;
+
+  /* Allocate global sym .plt and .got entries, and space for global
+     sym dynamic relocs.  */
+  elf_link_hash_traverse (&htab->elf, csky_allocate_dynrelocs, (PTR) info);
+
+  /* Check for GOT overflow.  */
+  if (check_got_overflow == 1
+      && htab->elf.sgot->size + htab->elf.sgotplt->size > GOT_MAX_SIZE)
+    {
+      _bfd_error_handler (_("error: GOT TABLE SIZE OUT OF RANGE!"));
+      return FALSE;
+    }
+
+  /* We now have determined the sizes of the various dynamic sections.
+     Allocate memory for them.  */
+  relocs = FALSE;
+  for (s = dynobj->sections; s != NULL; s = s->next)
+    {
+      bfd_boolean strip_section = TRUE;
+
+      if ((s->flags & SEC_LINKER_CREATED) == 0)
+	continue;
+
+      if (s == htab->elf.splt
+	  || s == htab->elf.sgot
+	  || s == htab->elf.sgotplt)
+	{
+	  /* Strip this section if we don't need it;
+	     see the comment below.  */
+	  /* We'd like to strip these sections if they aren't needed, but if
+	     we've exported dynamic symbols from them we must leave them.
+	     It's too late to tell BFD to get rid of the symbols.  */
+
+	  if (htab->elf.hplt != NULL)
+	    strip_section = FALSE;
+	}
+      else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel") )
+	{
+	  if (s->size != 0 )
+	    relocs = TRUE;
+
+	  /* We use the reloc_count field as a counter if we need
+	     to copy relocs into the output file.  */
+	  s->reloc_count = 0;
+	}
+      else
+	/* It's not one of our sections, so don't allocate space.  */
+	continue;
+
+      /* Strip this section if we don't need it; see the
+	 comment below.  */
+      if (s->size == 0)
+	{
+	  /* If we don't need this section, strip it from the
+	     output file.  This is mostly to handle .rel.bss and
+	     .rel.plt.  We must create both sections in
+	     create_dynamic_sections, because they must be created
+	     before the linker maps input sections to output
+	     sections.  The linker does that before
+	     adjust_dynamic_symbol is called, and it is that
+	     function which decides whether anything needs to go
+	     into these sections.  */
+	  if (strip_section)
+	    s->flags |= SEC_EXCLUDE;
+	  continue;
+	}
+
+      if ((s->flags & SEC_HAS_CONTENTS) == 0)
+	continue;
+
+      /* Allocate memory for the section contents.  We use bfd_zalloc
+	 here in case unused entries are not reclaimed before the
+	 section's contents are written out.  This should not happen,
+	 but this way if it does, we get a R_CKCORE_NONE reloc instead
+	 of garbage.  */
+      s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
+      if (s->contents == NULL)
+	return FALSE;
+    }
+
+  if (htab->elf.dynamic_sections_created)
+    {
+      /* Add some entries to the .dynamic section.  We fill in the
+	 values later, in csky_elf_finish_dynamic_sections, but we
+	 must add the entries now so that we get the correct size for
+	 the .dynamic section.  The DT_DEBUG entry is filled in by the
+	 dynamic linker and used by the debugger.  */
+#define add_dynamic_entry(TAG, VAL) \
+  _bfd_elf_add_dynamic_entry (info, TAG, VAL)
+
+      if (bfd_link_executable (info) && !add_dynamic_entry (DT_DEBUG, 0))
+	return FALSE;
+
+      if (htab->elf.sgot->size != 0 || htab->elf.splt->size)
+	{
+	  if (!add_dynamic_entry (DT_PLTGOT, 0)
+	      || !add_dynamic_entry (DT_PLTRELSZ, 0)
+	      || !add_dynamic_entry (DT_PLTREL, DT_RELA)
+	      || !add_dynamic_entry (DT_JMPREL, 0))
+	    return FALSE;
+	}
+
+      if (relocs)
+	{
+	  if (!add_dynamic_entry (DT_RELA, 0)
+	      || !add_dynamic_entry (DT_RELASZ, 0)
+	      || !add_dynamic_entry (DT_RELAENT,
+				     sizeof (Elf32_External_Rela)))
+	    return FALSE;
+
+	  /* If any dynamic relocs apply to a read-only section,
+	     then we need a DT_TEXTREL entry.  */
+	  if ((info->flags & DF_TEXTREL) == 0)
+	    elf_link_hash_traverse (&htab->elf, csky_readonly_dynrelocs,
+				    (PTR) info);
+
+	  if ((info->flags & DF_TEXTREL) != 0
+	      && !add_dynamic_entry (DT_TEXTREL, 0))
+	    return FALSE;
+	}
+    }
+#undef add_dynamic_entry
+
+  return TRUE;
+}
+
+/* Finish up dynamic symbol handling.  We set the contents of various
+   dynamic sections here.  */
+
+static bfd_boolean
+csky_elf_finish_dynamic_symbol (bfd *output_bfd,
+				struct bfd_link_info *info,
+				struct elf_link_hash_entry *h,
+				Elf_Internal_Sym *sym)
+{
+  struct csky_elf_link_hash_table *htab;
+
+  htab = csky_elf_hash_table (info);
+  if (htab == NULL)
+    return FALSE;
+
+  if (h->plt.offset != (bfd_vma) -1)
+    {
+      bfd_vma plt_index;
+      bfd_vma got_offset;
+      Elf_Internal_Rela rel;
+      bfd_byte *loc;
+      asection *plt, *relplt, *gotplt;
+
+      plt = htab->elf.splt;
+      relplt = htab->elf.srelplt;
+      gotplt = htab->elf.sgotplt;
+
+      /* This symbol has an entry in the procedure linkage table.  Set
+	 it up.  */
+      BFD_ASSERT (h->dynindx != -1
+		  || ((h->forced_local || bfd_link_executable (info))
+		      && h->def_regular));
+      BFD_ASSERT (plt != NULL && gotplt != NULL && relplt != NULL);
+      if (bfd_csky_abi (output_bfd) == CSKY_ABI_V2)
+	plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
+      else
+	plt_index = h->plt.offset / PLT_ENTRY_SIZE_P - 1;
+      got_offset = (plt_index + 3) * 4;
+
+      /* Fill in the entry in the procedure linkage table.  */
+      if (bfd_csky_abi (output_bfd) == CSKY_ABI_V2)
+	{
+	  csky_put_insn_32 (output_bfd, csky_elf_plt_entry_v2[0],
+			    plt->contents + h->plt.offset);
+	  csky_put_insn_32 (output_bfd,
+			    (csky_elf_plt_entry_v2[1] | plt_index),
+			    plt->contents + h->plt.offset + 4);
+	  csky_put_insn_32 (output_bfd, csky_elf_plt_entry_v2[2],
+			    plt->contents + h->plt.offset + 8);
+	}
+      else
+	{
+	  int i;
+	  for (i = 0; i < 6; i++)
+	    bfd_put_16 (output_bfd, csky_elf_plt_entry_v1[i],
+			plt->contents + h->plt.offset + i * 2);
+	  bfd_put_32 (output_bfd, plt_index,
+		      plt->contents + h->plt.offset + i * 2);
+	}
+
+      /* Fill in the entry in the .rel.plt section.  */
+      rel.r_offset = (htab->elf.sgotplt->output_section->vma
+		      + htab->elf.sgotplt->output_offset
+		      + got_offset);
+      rel.r_info = ELF32_R_INFO (h->dynindx, R_CKCORE_JUMP_SLOT);
+      rel.r_addend = (plt->output_section->vma
+		      + plt->output_offset
+		      + h->plt.offset);
+      loc = (htab->elf.srelplt->contents
+	     + plt_index * sizeof (Elf32_External_Rela));
+
+      if (loc != NULL)
+	bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
+      if (! h->def_regular)
+	{
+	  /* Mark the symbol as undefined, rather than as defined in
+	     the .plt section.  Leave the value alone.  */
+	  sym->st_shndx = SHN_UNDEF;
+	  /* If the symbol is weak, we do need to clear the value.
+	     Otherwise, the PLT entry would provide a definition for
+	     the symbol even if the symbol wasn't defined anywhere,
+	     and so the symbol would never be NULL. Leave the value if
+	     there were any relocations where pointer equality matters
+	     (this is a clue for the dynamic linker, to make function
+	     pointer comparisons work between an application and shared
+	     library).  */
+	  if (!h->ref_regular_nonweak || !h->pointer_equality_needed)
+	    sym->st_value = 0;
+	}
+    }
+
+  /* Fill in the entry in the .got section.  */
+  if (h->got.offset != (bfd_vma) -1
+      && ((csky_elf_hash_entry (h)->tls_type & GOT_TLS_GD) == 0)
+      && ((csky_elf_hash_entry (h)->tls_type & GOT_TLS_IE) == 0))
+    {
+      Elf_Internal_Rela rel;
+      bfd_byte *loc;
+
+      /* This symbol has an entry in the global offset table.
+	 Set it up.  */
+      BFD_ASSERT (htab->elf.sgot != NULL && htab->elf.srelgot != NULL);
+
+      rel.r_offset = (htab->elf.sgot->output_section->vma
+		      + htab->elf.sgot->output_offset
+		      + (h->got.offset & ~(bfd_vma) 1));
+
+      /* If this is a static link, or it is a -Bsymbolic link and the
+	 symbol is defined locally or was forced to be local because
+	 of a version file, we just want to emit a RELATIVE reloc.
+	 The entry in the global offset table will already have been
+	 initialized in the relocate_section function.  */
+      if (bfd_link_pic (info) && SYMBOL_REFERENCES_LOCAL (info, h))
+	{
+	  BFD_ASSERT ((h->got.offset & 1) != 0);
+	  rel.r_info = ELF32_R_INFO (0, R_CKCORE_RELATIVE);
+	  rel.r_addend = (h->root.u.def.value
+			  + h->root.u.def.section->output_offset
+			  + h->root.u.def.section->output_section->vma);
+	}
+      else
+	{
+	  BFD_ASSERT ((h->got.offset & 1) == 0);
+	  bfd_put_32 (output_bfd, (bfd_vma) 0,
+		      htab->elf.sgot->contents + h->got.offset);
+	  rel.r_info = ELF32_R_INFO (h->dynindx, R_CKCORE_GLOB_DAT);
+	  rel.r_addend = 0;
+	}
+
+      loc = htab->elf.srelgot->contents;
+      loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
+
+      if (loc != NULL)
+	bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
+    }
+
+
+  /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute.  */
+  if (strcmp (h->root.root.string, "_DYNAMIC") == 0
+      || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
+    sym->st_shndx = SHN_ABS;
+
+  return TRUE;
+}
+
+/* Finish up the dynamic sections.  */
+
+static bfd_boolean
+csky_elf_finish_dynamic_sections (bfd *output_bfd,
+				  struct bfd_link_info *info)
+{
+  struct csky_elf_link_hash_table *htab;
+  bfd *dynobj;
+  asection *sdyn;
+  asection *got_sec;
+
+  htab = csky_elf_hash_table (info);
+  if (htab == NULL)
+    return FALSE;
+
+  dynobj = htab->elf.dynobj;
+  sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
+
+  if (htab->elf.dynamic_sections_created)
+    {
+      Elf32_External_Dyn *dyncon, *dynconend;
+
+      BFD_ASSERT (sdyn != NULL && htab->elf.sgot != NULL);
+
+      dyncon = (Elf32_External_Dyn *) sdyn->contents;
+      dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
+      for (; dyncon < dynconend; dyncon++)
+	{
+	  Elf_Internal_Dyn dyn;
+	  bfd_boolean size = FALSE;
+	  const char *name = NULL;
+
+	  bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
+	  switch (dyn.d_tag)
+	    {
+	    default:
+	      continue;
+	    case DT_RELA:
+	      name = ".rela.dyn";
+	      size = FALSE;
+	      break;
+	    case DT_RELASZ:
+	      name = ".rela.dyn";
+	      size = TRUE;
+	      break;
+	    case DT_PLTRELSZ:
+	      name = ".rela.plt";
+	      size = TRUE;
+	      break;
+	    case DT_PLTGOT:
+	      dyn.d_un.d_ptr = htab->elf.sgot->output_section->vma;
+	      break;
+	    case DT_JMPREL:
+	      dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma
+			       + htab->elf.srelplt->output_offset;
+	      break;
+	    }
+
+	  if (name != NULL)
+	    {
+	      asection *s = bfd_get_section_by_name (output_bfd, name);
+
+	      if (s == NULL)
+		dyn.d_un.d_val = 0;
+	      else if (!size)
+		dyn.d_un.d_ptr = s->vma;
+	      else
+		dyn.d_un.d_val = s->size;
+	    }
+	  bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
+	}
+    }
+
+  /* Fill in the first three entries in the global offset table.  */
+  if (htab->elf.sgotplt)
+    got_sec = htab->elf.sgotplt;
+  else
+    got_sec = htab->elf.sgot;
+  if (got_sec != NULL)
+    {
+      if (got_sec->size > 0)
+	{
+	  bfd_put_32 (output_bfd,
+		      (sdyn == NULL ? (bfd_vma) 0
+		       : sdyn->output_section->vma + sdyn->output_offset),
+		      got_sec->contents);
+	  bfd_put_32 (output_bfd, (bfd_vma) 0, got_sec->contents + 4);
+	  bfd_put_32 (output_bfd, (bfd_vma) 0, got_sec->contents + 8);
+	}
+      elf_section_data (got_sec->output_section)->this_hdr.sh_entsize = 4;
+    }
+  return TRUE;
+}
+
+/* Copy the extra info we tack onto an elf_link_hash_entry.  */
+
+static void
+csky_elf_copy_indirect_symbol (struct bfd_link_info *info,
+			       struct elf_link_hash_entry *dir,
+			       struct elf_link_hash_entry *ind)
+{
+  struct csky_elf_link_hash_entry *edir, *eind;
+
+  edir = (struct csky_elf_link_hash_entry *) dir;
+  eind = (struct csky_elf_link_hash_entry *) ind;
+
+  if (eind->dyn_relocs != NULL)
+    {
+      if (edir->dyn_relocs != NULL)
+	{
+	  struct elf_dyn_relocs **pp;
+	  struct elf_dyn_relocs *p;
+
+	  /* Add reloc counts against the indirect sym to the direct sym
+	     list.  Merge any entries against the same section.  */
+	  for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
+	    {
+	      struct elf_dyn_relocs *q;
+
+	      for (q = edir->dyn_relocs; q != NULL; q = q->next)
+		if (q->sec == p->sec)
+		  {
+		    q->pc_count += p->pc_count;
+		    q->count += p->count;
+		    *pp = p->next;
+		    break;
+		  }
+	      if (q == NULL)
+		pp = &p->next;
+	    }
+	  *pp = edir->dyn_relocs;
+	}
+      edir->dyn_relocs = eind->dyn_relocs;
+      eind->dyn_relocs = NULL;
+    }
+  if (ind->root.type == bfd_link_hash_indirect
+      && dir->got.refcount <= 0)
+    {
+      edir->tls_type = eind->tls_type;
+      eind->tls_type = GOT_UNKNOWN;
+    }
+  _bfd_elf_link_hash_copy_indirect (info, dir, ind);
+}
+
+/* Used to decide how to sort relocs in an optimal manner for the
+   dynamic linker, before writing them out.  */
+
+static enum elf_reloc_type_class
+csky_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
+			   const asection *rel_sec ATTRIBUTE_UNUSED,
+			   const Elf_Internal_Rela *rela)
+{
+  switch ((int) ELF32_R_TYPE (rela->r_info))
+    {
+    case R_CKCORE_RELATIVE:
+      return reloc_class_relative;
+    case R_CKCORE_JUMP_SLOT:
+      return reloc_class_plt;
+    case R_CKCORE_COPY:
+      return reloc_class_copy;
+    case R_CKCORE_IRELATIVE:
+      return reloc_class_ifunc;
+    default:
+      return reloc_class_normal;
+    }
+}
+
+/* Return the section that should be marked against GC for a given
+   relocation.  */
+
+static asection *
+csky_elf_gc_mark_hook (asection *sec,
+		       struct bfd_link_info *info,
+		       Elf_Internal_Rela *rel,
+		       struct elf_link_hash_entry *h,
+		       Elf_Internal_Sym *sym)
+{
+  if (h != NULL)
+    {
+      switch (ELF32_R_TYPE (rel->r_info))
+	{
+	case R_CKCORE_GNU_VTINHERIT:
+	case R_CKCORE_GNU_VTENTRY:
+	  return NULL;
+	}
+    }
+
+  return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
+}
+
+/* Look through the relocs for a section during the first phase.
+   Since we don't do .gots or .plts, we just need to consider the
+   virtual table relocs for gc.  */
+static bfd_boolean
+csky_elf_check_relocs (bfd * abfd,
+		       struct bfd_link_info * info,
+		       asection * sec,
+		       const Elf_Internal_Rela * relocs)
+{
+  Elf_Internal_Shdr * symtab_hdr;
+  struct elf_link_hash_entry ** sym_hashes;
+  const Elf_Internal_Rela * rel;
+  const Elf_Internal_Rela * rel_end;
+  struct csky_elf_link_hash_table *htab;
+  asection *sreloc;
+
+  /* if output type is relocatable, return.  */
+  if (bfd_link_relocatable (info))
+    return TRUE;
+
+  htab = csky_elf_hash_table (info);
+  if (htab == NULL)
+    return FALSE;
+
+  symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
+  sym_hashes = elf_sym_hashes (abfd);
+
+  rel_end = relocs + sec->reloc_count;
+  sreloc = NULL;
+  for (rel = relocs; rel < rel_end; rel++)
+    {
+      struct elf_link_hash_entry *h;
+      unsigned long r_symndx;
+      Elf_Internal_Sym *isym;
+      int r_type;
+
+      r_symndx = ELF32_R_SYM (rel->r_info);
+      r_type = ELF32_R_TYPE (rel->r_info);
+      if (r_symndx < symtab_hdr->sh_info)
+	{
+	  /* A local symbol.  */
+	  isym = bfd_sym_from_r_symndx (&htab->sym_cache,
+					abfd, r_symndx);
+	  if (isym == NULL)
+	    return FALSE;
+	  h = NULL;
+	}
+      else
+	{
+	  isym = NULL;
+	  h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+	  while (h->root.type == bfd_link_hash_indirect
+		 || h->root.type == bfd_link_hash_warning)
+	    h = (struct elf_link_hash_entry *) h->root.u.i.link;
+	}
+
+      switch (r_type)
+	{
+	case R_CKCORE_PCREL_IMM26BY2:
+	case R_CKCORE_PCREL_IMM11BY2:
+	case R_CKCORE_PCREL_JSR_IMM11BY2:
+	case R_CKCORE_PCREL_JSR_IMM26BY2:
+	  /* If the symbol is '*UND*', means this reloc is used for
+	   * callgraph, don't need to leave to shared object. */
+	  if (r_symndx == 0)
+	    break;
+	case R_CKCORE_ADDR32:
+	case R_CKCORE_ADDR_HI16:
+	case R_CKCORE_ADDR_LO16:
+	  /* If we are creating a shared library or relocatable executable,
+	     and this is a reloc against a global symbol, then we need to
+	     copy the reloc into the shared library. However, if we are
+	     linking with -Bsymbolic, we do not need to copy a reloc
+	     against a global symbol which is defined in an object we are
+	     including in the link (i.e., DEF_REGULAR is set).  At
+	     this point we have not seen all the input files, so it is
+	     possible that DEF_REGULAR is not set now but will be set
+	     later (it is never cleared). We account for that possibility
+	     below by storing information in the relocs_copied field of
+	     the hash table entry.  */
+	  if ((bfd_link_pic (info) && (sec->flags & SEC_ALLOC) != 0)
+	      || (!bfd_link_pic (info)
+		  && (sec->flags & SEC_ALLOC) != 0
+		  && h != NULL
+		  && (h->root.type == bfd_link_hash_defweak
+		      || !h->def_regular)))
+	    {
+	      struct elf_dyn_relocs *p;
+	      struct elf_dyn_relocs **head;
+	      /* We must copy these reloc types into the output file.
+		 Create a reloc section in dynobj and make room for
+		 this reloc.  */
+	      if (sreloc == NULL)
+		{
+		  if (htab->elf.dynobj == NULL)
+		    htab->elf.dynobj = abfd;
+		  
+		  sreloc = _bfd_elf_make_dynamic_reloc_section
+		    (sec, htab->elf.dynobj, 2, abfd, TRUE);
+		  
+		  if (sreloc == NULL)
+		    return FALSE;
+		}
+	      
+	      if (h == NULL && !use_branch_stub
+		  && ((ELF32_R_TYPE (rel->r_info)
+		       == R_CKCORE_PCREL_IMM26BY2)
+		      || (ELF32_R_TYPE (rel->r_info)
+			  == R_CKCORE_PCREL_IMM11BY2)))
+		break;
+	      
+	      /* If this is a global symbol, we count the number of
+		 relocations we need for this symbol.
+		 jsri2bsr_refcount for relocation output maybe*/
+	      if (h != NULL)
+		{
+		  struct csky_elf_link_hash_entry *eh;
+		  eh = (struct  csky_elf_link_hash_entry *)h;
+		  if ((ELF32_R_TYPE (rel->r_info)
+		       == R_CKCORE_PCREL_JSR_IMM26BY2)
+		      || (ELF32_R_TYPE (rel->r_info)
+			  == R_CKCORE_PCREL_JSR_IMM11BY2))
+		    eh->jsri2bsr_refcount += 1;
+		  head = &eh->dyn_relocs;
+		}
+	      else
+		{
+		  /* Track dynamic relocs needed for local syms too.
+		     We really need local syms available to do this
+		     easily.  Oh well.  */
+		  void **vpp;
+		  asection *s;
+		  Elf_Internal_Sym *loc_isym;
+		  
+		  loc_isym = bfd_sym_from_r_symndx (&htab->sym_cache,
+						    abfd, r_symndx);
+		  if (loc_isym == NULL)
+		    return FALSE;
+		  s = bfd_section_from_elf_index (abfd, loc_isym->st_shndx);
+		  if (s == NULL)
+		    s = sec;
+		  vpp = &elf_section_data (s)->local_dynrel;
+		  head = (struct elf_dyn_relocs **)vpp;
+		}
+	      
+	      p = *head;
+	      if (p == NULL || p->sec != sec)
+		{
+		  bfd_size_type amt = sizeof *p;
+		  p = ((struct elf_dyn_relocs *)
+		       bfd_alloc (htab->elf.dynobj, amt));
+		  if (p == NULL)
+		    return FALSE;
+		  p->next = *head;
+		  *head = p;
+		  p->sec = sec;
+		  p->count = 0;
+		  p->pc_count = 0;
+		}
+	      
+	      if (ELF32_R_TYPE (rel->r_info) == R_CKCORE_PCREL_IMM26BY2
+		  || ELF32_R_TYPE (rel->r_info) == R_CKCORE_PCREL_IMM11BY2)
+		p->pc_count += 1;
+	      p->count += 1;
+	    }
+	  break;
+	  
+	case R_CKCORE_PLT_IMM18BY4:
+	case R_CKCORE_PLT32:
+	  /* This symbol requires a procedure linkage table entry.  We
+	     actually build the entry in adjust_dynamic_symbol,
+	     because this might be a case of linking PIC code which is
+	     never referenced by a dynamic object, in which case we
+	     don't need to generate a procedure linkage table entry
+	     after all.  */
+	  
+	  /* If this is a local symbol, we resolve it directly without
+	     creating a procedure linkage table entry.  */
+	  if (h == NULL)
+	    continue;
+	  if (ELF32_R_TYPE (rel->r_info) == R_CKCORE_PLT_IMM18BY4)
+	    check_got_overflow = 1;
+	  
+	  h->needs_plt = 1;
+	  h->plt.refcount += 1;
+	  h->got.refcount += 1;
+	  ((struct  csky_elf_link_hash_entry *)h)->plt_refcount += 1;
+	  break;
+	  
+	case R_CKCORE_GOT12:
+	case R_CKCORE_PLT12:
+	case R_CKCORE_GOT32:
+	case R_CKCORE_GOT_HI16:
+	case R_CKCORE_GOT_LO16:
+	case R_CKCORE_PLT_HI16:
+	case R_CKCORE_PLT_LO16:
+	case R_CKCORE_GOT_IMM18BY4:
+	case R_CKCORE_TLS_IE32:
+	case R_CKCORE_TLS_GD32:
+	  {
+	    int tls_type, old_tls_type;
+	    switch (ELF32_R_TYPE (rel->r_info))
+	      {
+	      case R_CKCORE_TLS_IE32:
+		tls_type = GOT_TLS_IE;
+		break;
+	      case R_CKCORE_TLS_GD32:
+		tls_type = GOT_TLS_GD;
+		break;
+	      default:
+		tls_type = GOT_NORMAL;
+		break;
+	      }
+	    if (h != NULL)
+	      {
+		if (ELF32_R_TYPE (rel->r_info) == R_CKCORE_GOT_IMM18BY4)
+		  check_got_overflow = 1;
+		h->got.refcount += 1;
+		old_tls_type = csky_elf_hash_entry (h)->tls_type;
+	      }
+	    else
+	      {
+		bfd_signed_vma *local_got_refcounts;
+		
+		/* This is a global offset table entry for a local symbol.  */
+		/* we can write a new function named
+		   elf32_csky_allocate_local_sym_info() to replace
+		   following code.  */
+		local_got_refcounts = elf_local_got_refcounts (abfd);
+		if (local_got_refcounts == NULL)
+		  {
+		    bfd_size_type size;
+		    
+		    size = symtab_hdr->sh_info;
+		    size *= (sizeof (bfd_signed_vma) + sizeof (char));
+		    local_got_refcounts = ((bfd_signed_vma *)
+					   bfd_zalloc (abfd, size));
+		    if (local_got_refcounts == NULL)
+		      return FALSE;
+		    elf_local_got_refcounts (abfd) = local_got_refcounts;
+		    csky_elf_local_got_tls_type (abfd)
+		      = (char *) (local_got_refcounts + symtab_hdr->sh_info);
+		  }
+		local_got_refcounts[r_symndx] += 1;
+		old_tls_type = csky_elf_local_got_tls_type (abfd)[r_symndx];
+	      }
+	    
+	    /* We will already have issued an error message if there is a
+	       TLS / non-TLS mismatch, based on the symbol type.  We don't
+	       support any linker relaxations.  So just combine any TLS
+	       types needed.  */
+	    if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL
+		&& tls_type != GOT_NORMAL)
+	      tls_type |= old_tls_type;
+	    
+	    if (old_tls_type != tls_type)
+	      {
+		if (h != NULL)
+		  csky_elf_hash_entry (h)->tls_type = tls_type;
+		else
+		  csky_elf_local_got_tls_type (abfd)[r_symndx] = tls_type;
+	      }
+	  }
+	  /* Fall through.  */
+	  
+	case R_CKCORE_TLS_LDM32:
+	  if (ELF32_R_TYPE (rel->r_info) == R_CKCORE_TLS_LDM32)
+	    htab->tls_ldm_got.refcount++;
+	  /* Fall through.  */
+	  
+	case R_CKCORE_GOTOFF:
+	case R_CKCORE_GOTPC:
+	case R_CKCORE_GOTOFF_HI16:
+	case R_CKCORE_GOTOFF_LO16:
+	case R_CKCORE_GOTPC_HI16:
+	case R_CKCORE_GOTPC_LO16:
+	case R_CKCORE_GOTOFF_IMM18:
+	  if (htab->elf.sgot == NULL)
+	    {
+	      if (htab->elf.dynobj == NULL)
+		htab->elf.dynobj = abfd;
+	      if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
+		return FALSE;
+	    }
+	  break;
+	  
+	  /* This relocation describes the C++ object vtable hierarchy.
+	     Reconstruct it for later use during GC.  */
+	case R_CKCORE_GNU_VTINHERIT:
+	  if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
+	    return FALSE;
+	  break;
+	  
+	  /* This relocation describes which C++ vtable entries are actually
+	     used.  Record for later use during GC.  */
+	case R_CKCORE_GNU_VTENTRY:
+	  BFD_ASSERT (h != NULL);
+	  if (h != NULL
+	      && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
+	    return FALSE;
+	  break;
+	}
+    }
+
+  return TRUE;
+}
+
+static const struct bfd_elf_special_section csky_elf_special_sections[]=
+{
+  { STRING_COMMA_LEN (".ctors"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
+  { STRING_COMMA_LEN (".dtors"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
+  { NULL,                     0,  0, 0,            0 }
+};
+
+/* Function to keep CSKY specific flags in the ELF header.  */
+
+static bfd_boolean
+csky_elf_set_private_flags (bfd * abfd, flagword flags)
+{
+  BFD_ASSERT (! elf_flags_init (abfd)
+	      || elf_elfheader (abfd)->e_flags == flags);
+
+  elf_elfheader (abfd)->e_flags = flags;
+  elf_flags_init (abfd) = TRUE;
+  return TRUE;
+}
+
+static csky_arch_for_merge *
+csky_find_arch_with_eflag (const unsigned long arch_eflag)
+{
+  csky_arch_for_merge *csky_arch = NULL;
+
+  for (csky_arch = csky_archs; csky_arch->name != NULL; csky_arch++)
+    if (csky_arch->arch_eflag == arch_eflag)
+      break;
+  if (csky_arch == NULL)
+    {
+      _bfd_error_handler (_("warning: unrecognized arch eflag '%#lx'"),
+			   arch_eflag);
+      bfd_set_error (bfd_error_wrong_format);
+    }
+  return csky_arch;
+}
+
+/* Merge backend specific data from an object file to the output
+   object file when linking.  */
+
+static bfd_boolean
+csky_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
+{
+  bfd *obfd = info->output_bfd;
+  flagword old_flags;
+  flagword new_flags;
+  csky_arch_for_merge *old_arch = NULL;
+  csky_arch_for_merge *new_arch = NULL;
+
+  /* Check if we have the same endianness.  */
+  if (! _bfd_generic_verify_endian_match (ibfd, info))
+    return FALSE;
+
+  if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
+      || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
+    return TRUE;
+
+  new_flags = elf_elfheader (ibfd)->e_flags;
+  old_flags = elf_elfheader (obfd)->e_flags;
+
+  if (! elf_flags_init (obfd))
+    {
+      /* First call, no flags set.  */
+      elf_flags_init (obfd) = TRUE;
+      elf_elfheader (obfd)->e_flags = new_flags;
+    }
+  else if (new_flags == old_flags)
+    /* Do nothing.  */
+    ;
+  else if (new_flags == 0 || old_flags == 0)
+    /* When one flag is 0, assign the other one's flag.  */
+      elf_elfheader (obfd)->e_flags = new_flags | old_flags;
+  else
+    {
+      flagword newest_flag = 0;
+
+      if ((new_flags & CSKY_ARCH_MASK) != 0
+	  && (old_flags & CSKY_ARCH_MASK) != 0)
+	{
+	  new_arch = csky_find_arch_with_eflag (new_flags & CSKY_ARCH_MASK);
+	  old_arch = csky_find_arch_with_eflag (old_flags & CSKY_ARCH_MASK);
+	  /* Collect flags like e, f, g.  */
+	  newest_flag = (old_flags & (~CSKY_ARCH_MASK))
+			 | (new_flags & (~CSKY_ARCH_MASK));
+	  if (new_arch != NULL && old_arch != NULL)
+	    {
+	      if (new_arch->class != old_arch->class)
+		{
+		  _bfd_error_handler
+		    /* xgettext:c-format */
+		    (_("%pB: machine flag conflict with target"), ibfd);
+		  bfd_set_error (bfd_error_wrong_format);
+		  return FALSE;
+		}
+	      else if (new_arch->class_level != old_arch->class_level)
+		{
+		  csky_arch_for_merge *newest_arch
+		    = (new_arch->class_level > old_arch->class_level
+		       ? new_arch : old_arch);
+		  if (new_arch->do_warning || old_arch->do_warning)
+		    {
+		      _bfd_error_handler
+			/* xgettext:c-format */
+			(_("warning: file %pB's arch flag ck%s conflicts with \
+			      target ck%s, set target arch flag to ck%s"),
+			 ibfd, new_arch->name, old_arch->name,
+			 newest_arch->name);
+		       bfd_set_error (bfd_error_wrong_format);
+		    }
+
+		  newest_flag |= newest_arch->arch_eflag;
+		}
+	      else
+		newest_flag |= ((new_flags & (CSKY_ARCH_MASK | CSKY_ABI_MASK))
+				| (old_flags
+				   & (CSKY_ARCH_MASK | CSKY_ABI_MASK)));
+	    }
+	  else
+	    newest_flag |= ((new_flags & (CSKY_ARCH_MASK | CSKY_ABI_MASK))
+			    | (old_flags & (CSKY_ARCH_MASK | CSKY_ABI_MASK)));
+	}
+      else
+	newest_flag |= ((new_flags & (CSKY_ARCH_MASK | CSKY_ABI_MASK))
+			| (old_flags & (CSKY_ARCH_MASK | CSKY_ABI_MASK)));
+
+      elf_elfheader (obfd)->e_flags = newest_flag;
+    }
+  return TRUE;
+}
+
+/* Ignore the discarded relocs in special sections in link time.  */
+
+static bfd_boolean
+csky_elf_ignore_discarded_relocs (asection *sec)
+{
+  if (strcmp (sec->name, ".csky_stack_size") == 0)
+    return TRUE;
+  return FALSE;
+}
+
+/* .csky_stack_size are not referenced directly.  This pass marks all of
+   them as required.  */
+
+static bfd_boolean
+elf32_csky_gc_mark_extra_sections (struct bfd_link_info *info,
+				   elf_gc_mark_hook_fn gc_mark_hook ATTRIBUTE_UNUSED)
+{
+  bfd *sub;
+
+  _bfd_elf_gc_mark_extra_sections (info, gc_mark_hook);
+
+  for (sub = info->input_bfds; sub != NULL; sub = sub->link.next)
+    {
+      asection *o;
+
+      for (o = sub->sections; o != NULL; o = o->next)
+	if (strcmp (o->name, ".csky_stack_size") == 0)
+	  o->gc_mark = 1;
+    }
+
+  return TRUE;
+}
+
+/* The linker repeatedly calls this function for each input section,
+   in the order that input sections are linked into output sections.
+   Build lists of input sections to determine groupings between which
+   we may insert linker stubs.  */
+void
+elf32_csky_next_input_section (struct bfd_link_info *info,
+			       asection *isec)
+{
+  struct csky_elf_link_hash_table *htab = csky_elf_hash_table (info);
+  if (htab == NULL)
+    return;
+  if (isec->output_section->index <= htab->top_index)
+    {
+      asection **list = htab->input_list + isec->output_section->index;
+
+      if (*list != bfd_abs_section_ptr)
+	{
+	  /* Steal the link_sec pointer for our list.  */
+#define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
+	  /* This happens to make the list in reverse order,
+	     which we reverse later in group_sections.  */
+	  PREV_SEC (isec) = *list;
+	  *list = isec;
+	}
+    }
+}
+
+/* See whether we can group stub sections together.  Grouping stub
+ * sections may result in fewer stubs.  More importantly, we need to
+ * put all .init* and .fini* stubs at the end of the .init or
+ * .fini output sections respectively, because glibc splits the
+ * _init and _fini functions into multiple parts.  Putting a stub in
+ * the middle of a function is not a good idea.  */
+static void
+group_sections (struct csky_elf_link_hash_table *htab,
+		bfd_size_type stub_group_size,
+		bfd_boolean stubs_always_after_branch)
+{
+  asection **list = htab->input_list;
+
+  do
+    {
+      asection *tail = *list;
+      asection *head;
+
+      if (tail == bfd_abs_section_ptr)
+	continue;
+
+      /* Reverse the list: we must avoid placing stubs at the
+       * beginning of the section because the beginning of the text
+       * section may be required for an interrupt vector in bare metal
+       * code.  */
+#define NEXT_SEC PREV_SEC
+      head = NULL;
+      while (tail != NULL)
+	{
+	  /* Pop from tail.  */
+	  asection *item = tail;
+	  tail = PREV_SEC (item);
+
+	  /* Push on head.  */
+	  NEXT_SEC (item) = head;
+	  head = item;
+	}
+
+      while (head != NULL)
+	{
+	  asection *curr;
+	  asection *next;
+	  bfd_vma stub_group_start = head->output_offset;
+	  bfd_vma end_of_next;
+
+	  curr = head;
+	  while (NEXT_SEC (curr) != NULL)
+	    {
+	      next = NEXT_SEC (curr);
+	      end_of_next = next->output_offset + next->size;
+	      if (end_of_next - stub_group_start >= stub_group_size)
+		/* End of NEXT is too far from start, so stop.  */
+		break;
+	      curr = next;
+	    }
+
+	  /* OK, the size from the start to the start of CURR is less
+	   * than stub_group_size and thus can be handled by one stub
+	   * section.  (Or the head section is itself larger than
+	   * stub_group_size, in which case we may be toast.)
+	   * We should really be keeping track of the total size of
+	   * stubs added here, as stubs contribute to the final output
+	   * section size.  */
+	  do
+	    {
+	      next = NEXT_SEC (head);
+	      /* Set up this stub group.  */
+	      htab->stub_group[head->id].link_sec = curr;
+	    }
+	  while (head != curr && (head = next) != NULL);
+
+	  /* But wait, there's more!  Input sections up to stub_group_size
+	   * bytes after the stub section can be handled by it too.  */
+	  if (!stubs_always_after_branch)
+	    {
+	      stub_group_start = curr->output_offset + curr->size;
+
+	      while (next != NULL)
+		{
+		  end_of_next = next->output_offset + next->size;
+		  if (end_of_next - stub_group_start >= stub_group_size)
+		    /* End of NEXT is too far from stubs, so stop.  */
+		    break;
+		  /* Add NEXT to the stub group.  */
+		  head = next;
+		  next = NEXT_SEC (head);
+		  htab->stub_group[head->id].link_sec = curr;
+		}
+	    }
+	  head = next;
+	}
+    }
+  while (list++ != htab->input_list + htab->top_index);
+
+  free (htab->input_list);
+#undef PREV_SEC
+#undef NEXT_SEC
+}
+
+/* If the symbol referenced by bsr is defined in shared object file,
+   or it is a weak symbol and we aim to create shared object file,
+   we must create a stub for this bsr.  */
+
+static bfd_boolean
+sym_must_create_stub (struct elf_link_hash_entry *h,
+		      struct bfd_link_info *info)
+{
+  if (h != NULL
+      && ((h->def_dynamic && !h->def_regular)
+	  || (bfd_link_pic (info) && h->root.type == bfd_link_hash_defweak)))
+    return TRUE;
+  else
+    return FALSE;
+}
+
+/* Calculate the template, template size and instruction size for a stub.
+   Return value is the instruction size.  */
+static unsigned int
+find_stub_size_and_template (enum elf32_csky_stub_type stub_type,
+			     const insn_sequence **stub_template,
+			     int *stub_template_size)
+{
+  const insn_sequence *template_sequence = NULL;
+  int template_size = 0;
+  int i;
+  unsigned int size;
+
+  template_sequence = stub_definitions[stub_type].template_sequence;
+  template_size = stub_definitions[stub_type].template_size;
+
+  size = 0;
+  for (i = 0; i < template_size; i++)
+    {
+      switch (template_sequence[i].type)
+      {
+      case INSN16:
+	size += 2;
+	break;
+	
+      case INSN32:
+      case DATA_TYPE:
+	size += 4;
+	break;
+	
+      default:
+	BFD_FAIL ();
+	return FALSE;
+      }
+    }
+
+  if (stub_template)
+    *stub_template = template_sequence;
+  if (stub_template_size)
+    *stub_template_size = template_size;
+
+  return size;
+}
+
+/* As above, but don't actually build the stub.  Just bump offset so
+   we know stub section sizes.  */
+
+static bfd_boolean
+csky_size_one_stub (struct bfd_hash_entry *gen_entry,
+		    void * in_arg ATTRIBUTE_UNUSED)
+{
+  struct elf32_csky_stub_hash_entry *stub_entry;
+  const insn_sequence *template_sequence = NULL;
+  int template_size = 0;
+  int size = 0;
+
+  /* Massage our args to the form they really have.  */
+  stub_entry = (struct elf32_csky_stub_hash_entry *) gen_entry;
+
+  BFD_ASSERT (stub_entry->stub_type > csky_stub_none
+	      && stub_entry->stub_type < ARRAY_SIZE (stub_definitions));
+  size = find_stub_size_and_template (stub_entry->stub_type,
+				      &template_sequence, &template_size);
+  stub_entry->stub_size = size;
+  stub_entry->stub_template = template_sequence;
+  stub_entry->stub_template_size = template_size;
+
+  size = (size + 7) & ~7;
+  stub_entry->stub_sec->size += size;
+  return TRUE;
+}
+
+/* Add a new stub entry to the stub hash.  Not all fields of the new
+   stub entry are initialised.  */
+static struct elf32_csky_stub_hash_entry *
+elf32_csky_add_stub (const char *stub_name,
+		     asection *section,
+		     struct csky_elf_link_hash_table *htab)
+{
+  asection *link_sec;
+  asection *stub_sec;
+  struct elf32_csky_stub_hash_entry *stub_entry;
+
+  stub_sec = elf32_csky_create_or_find_stub_sec (&link_sec, section, htab);
+  if (stub_sec == NULL)
+    return NULL;
+
+  /* Enter this entry into the linker stub hash table.  */
+  stub_entry = csky_stub_hash_lookup (&htab->stub_hash_table, stub_name,
+				      TRUE, FALSE);
+  if (stub_entry == NULL)
+    {
+      _bfd_error_handler (_("%pB: cannot create stub entry %s"),
+			  section->owner, stub_name);
+      return NULL;
+    }
+
+  stub_entry->stub_sec = stub_sec;
+  stub_entry->stub_offset = 0;
+  stub_entry->id_sec = link_sec;
+
+  return stub_entry;
+}
+
+/* Determine and set the size of the stub section for a final link.
+   The basic idea here is to examine all the relocations looking for
+   PC-relative calls to a target that is unreachable with a "bsr"
+   instruction.  */
+
+bfd_boolean
+elf32_csky_size_stubs (bfd *output_bfd,
+		       bfd *stub_bfd,
+		       struct bfd_link_info *info,
+		       bfd_signed_vma group_size,
+		       asection *(*add_stub_section) (const char*, asection*),
+		       void (*layout_sections_again) (void))
+{
+  bfd_size_type stub_group_size;
+  bfd_boolean stubs_always_after_branch;
+  struct csky_elf_link_hash_table *htab = csky_elf_hash_table (info);
+
+  if (htab == NULL)
+    return FALSE;
+
+  /* Propagate mach to stub bfd, because it may not have been
+     finalized when we created stub_bfd.  */
+  bfd_set_arch_mach (stub_bfd, bfd_get_arch (output_bfd),
+		     bfd_get_mach (output_bfd));
+
+  /* Stash our params away.  */
+  htab->stub_bfd = stub_bfd;
+  htab->add_stub_section = add_stub_section;
+  htab->layout_sections_again = layout_sections_again;
+  stubs_always_after_branch = group_size < 0;
+
+  if (group_size < 0)
+    stub_group_size = -group_size;
+  else
+    stub_group_size = group_size;
+
+  if (stub_group_size == 1)
+    /* The 'bsr' range in abiv2 is +-64MB has to be used as the
+       default maximum size.
+       This value is 128K less than that, which allows for 131072
+       byte stubs. If we exceed that, then we will fail to link.
+       The user will have to relink with an explicit group size
+       option.  */
+    stub_group_size = 66977792;
+
+  group_sections (htab, stub_group_size, stubs_always_after_branch);
+
+  while (1)
+    {
+      bfd *input_bfd;
+      unsigned int bfd_indx;
+      asection *stub_sec;
+      bfd_boolean stub_changed = FALSE;
+
+      for (input_bfd = info->input_bfds, bfd_indx = 0;
+	   input_bfd != NULL;
+	   input_bfd = input_bfd->link.next, bfd_indx++)
+	{
+	  Elf_Internal_Shdr *symtab_hdr;
+	  asection *section;
+	  Elf_Internal_Sym *local_syms = NULL;
+
+	  /* We'll need the symbol table in a second.  */
+	  symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
+	  if (symtab_hdr->sh_info == 0)
+	    continue;
+
+	  /* Walk over each section attached to the input bfd.  */
+	  for (section = input_bfd->sections;
+	       section != NULL;
+	       section = section->next)
+	    {
+	      Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
+
+	      /* If there aren't any relocs, then there's nothing more
+	       * to do.  */
+	      if ((section->flags & SEC_RELOC) == 0
+		  || section->reloc_count == 0
+		  || (section->flags & SEC_CODE) == 0)
+		continue;
+
+	      /* If this section is a link-once section that will be
+		 discarded, then don't create any stubs.  */
+	      if (section->output_section == NULL
+		  || section->output_section->owner != output_bfd)
+		continue;
+
+	      /* Get the relocs.  */
+	      internal_relocs = _bfd_elf_link_read_relocs (input_bfd,
+							   section,
+							   NULL, NULL,
+							   info->keep_memory);
+
+	      if (internal_relocs == NULL)
+		goto error_ret_free_local;
+
+	      /* Now examine each relocation.  */
+	      irela = internal_relocs;
+	      irelaend = irela + section->reloc_count;
+	      for (; irela < irelaend; irela++)
+		{
+		  unsigned int r_type, r_indx;
+		  enum elf32_csky_stub_type stub_type;
+		  struct elf32_csky_stub_hash_entry *stub_entry;
+		  asection *sym_sec;
+		  bfd_vma sym_value;
+		  bfd_vma destination;
+		  struct csky_elf_link_hash_entry *hash;
+		  const char *sym_name;
+		  char *stub_name;
+		  const asection *id_sec;
+		  unsigned char st_type;
+
+		  r_type = ELF32_R_TYPE (irela->r_info);
+		  r_indx = ELF32_R_SYM (irela->r_info);
+		  if (r_type >= (unsigned int) R_CKCORE_MAX)
+		    {
+		      bfd_set_error (bfd_error_bad_value);
+error_ret_free_internal:
+		      if (elf_section_data (section)->relocs == NULL)
+			free (internal_relocs);
+		      goto error_ret_free_local;
+		    }
+
+		  /* Only look for stubs on branch instructions.  */
+		  if (r_type != (unsigned int) R_CKCORE_PCREL_IMM26BY2)
+		    continue;
+		  /* Now determine the call target, its name, value,
+		     section.  */
+		  sym_sec = NULL;
+		  sym_value = 0;
+		  destination = 0;
+		  hash = NULL;
+		  sym_name = NULL;
+		  if (r_indx < symtab_hdr->sh_info)
+		    {
+		      /* It's a local symbol.  */
+		      Elf_Internal_Sym *sym;
+		      Elf_Internal_Shdr *hdr;
+		      if (local_syms == NULL)
+			local_syms =
+			  (Elf_Internal_Sym *) symtab_hdr->contents;
+		      if (local_syms == NULL)
+			{
+			  local_syms =
+			    bfd_elf_get_elf_syms (input_bfd,
+						  symtab_hdr,
+						  symtab_hdr->sh_info,
+						  0, NULL, NULL, NULL);
+			  if (local_syms == NULL)
+			    goto error_ret_free_internal;
+			}
+		      sym = local_syms + r_indx;
+		      hdr = elf_elfsections (input_bfd)[sym->st_shndx];
+		      sym_sec = hdr->bfd_section;
+		      if (!sym_sec)
+			/* This is an undefined symbol.  It can never
+			   be resolved.  */
+			continue;
+		      if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
+			sym_value = sym->st_value;
+		      destination = (sym_value + irela->r_addend
+				     + sym_sec->output_offset
+				     + sym_sec->output_section->vma);
+		      st_type = ELF_ST_TYPE (sym->st_info);
+		      sym_name =
+			bfd_elf_string_from_elf_section (input_bfd,
+							 symtab_hdr->sh_link,
+							 sym->st_name);
+		    }
+		  else
+		    {
+		      /* It's an external symbol.  */
+		      int e_indx;
+		      e_indx = r_indx - symtab_hdr->sh_info;
+		      hash = ((struct csky_elf_link_hash_entry *)
+			      elf_sym_hashes (input_bfd)[e_indx]);
+
+		      while (hash->elf.root.type == bfd_link_hash_indirect
+			     || hash->elf.root.type == bfd_link_hash_warning)
+			hash = ((struct csky_elf_link_hash_entry *)
+				hash->elf.root.u.i.link);
+		      if (hash->elf.root.type == bfd_link_hash_defined
+			  || hash->elf.root.type == bfd_link_hash_defweak)
+			{
+			  sym_sec = hash->elf.root.u.def.section;
+			  sym_value = hash->elf.root.u.def.value;
+
+			  struct csky_elf_link_hash_table *globals =
+			    csky_elf_hash_table (info);
+			  /* FIXME For a destination in a shared library.  */
+			  if (globals->elf.splt != NULL && hash != NULL
+			      && hash->elf.plt.offset != (bfd_vma) -1)
+			    continue;
+			  else if (sym_sec->output_section != NULL)
+			    destination = (sym_value + irela->r_addend
+					   + sym_sec->output_offset
+					   + sym_sec->output_section->vma);
+			}
+		      else if (hash->elf.root.type == bfd_link_hash_undefined
+			       || (hash->elf.root.type
+				   == bfd_link_hash_undefweak))
+			/* FIXME For a destination in a shared library.  */
+			continue;
+		      else
+			{
+			  bfd_set_error (bfd_error_bad_value);
+			  goto error_ret_free_internal;
+			}
+		      st_type = ELF_ST_TYPE (hash->elf.type);
+		      sym_name = hash->elf.root.root.string;
+		    }
+		  do
+		    {
+		      /* Determine what (if any) linker stub is needed.  */
+		      stub_type = csky_type_of_stub (info, section, irela,
+						     st_type, hash,
+						     destination, sym_sec,
+						     input_bfd, sym_name);
+		      if (stub_type == csky_stub_none)
+			break;
+
+		      /* Support for grouping stub sections.  */
+		      id_sec = htab->stub_group[section->id].link_sec;
+
+		      /* Get the name of this stub.  */
+		      stub_name = elf32_csky_stub_name (id_sec, sym_sec, hash,
+							irela);
+		      if (!stub_name)
+			goto error_ret_free_internal;
+		      /* We've either created a stub for this reloc already,
+			 or we are about to.  */
+		      stub_entry
+			= csky_stub_hash_lookup	(&htab->stub_hash_table,
+						 stub_name,
+						 FALSE, FALSE);
+		      if (stub_entry != NULL)
+			{
+			  /* The proper stub has already been created.  */
+			  free (stub_name);
+			  stub_entry->target_value = sym_value;
+			  break;
+			}
+		      stub_entry = elf32_csky_add_stub (stub_name, section,
+							htab);
+		      if (stub_entry == NULL)
+			{
+			  free (stub_name);
+			  goto error_ret_free_internal;
+			}
+		      stub_entry->target_value = sym_value;
+		      stub_entry->target_section = sym_sec;
+		      stub_entry->stub_type = stub_type;
+		      stub_entry->h = hash;
+		      stub_entry->st_type = st_type;
+
+		      if (sym_name == NULL)
+			sym_name = "unnamed";
+		      stub_entry->output_name =
+			bfd_alloc (htab->stub_bfd,
+				   (sizeof (STUB_ENTRY_NAME)
+				    + strlen (sym_name)));
+		      if (stub_entry->output_name == NULL)
+			{
+			  free (stub_name);
+			  goto error_ret_free_internal;
+			}
+		      sprintf (stub_entry->output_name, STUB_ENTRY_NAME,
+			       sym_name);
+		      stub_changed = TRUE;
+		    }
+		  while (0);
+		}
+	      /* We're done with the internal relocs, free them.  */
+	      if (elf_section_data (section)->relocs == NULL)
+		free (internal_relocs);
+	    }
+	}
+      if (!stub_changed)
+	break;
+      /* OK, we've added some stubs.  Find out the new size of the
+	 stub sections.  */
+      for (stub_sec = htab->stub_bfd->sections;
+	   stub_sec != NULL;
+	   stub_sec = stub_sec->next)
+	{
+	  /* Ignore non-stub sections.  */
+	  if (!strstr (stub_sec->name, STUB_SUFFIX))
+	    continue;
+	  stub_sec->size = 0;
+	}
+      bfd_hash_traverse (&htab->stub_hash_table, csky_size_one_stub, htab);
+      /* Ask the linker to do its stuff.  */
+      (*htab->layout_sections_again) ();
+    }
+
+  return TRUE;
+error_ret_free_local:
+  return FALSE;
+}
+
+static bfd_boolean
+csky_build_one_stub (struct bfd_hash_entry *gen_entry,
+		     void * in_arg)
+{
+#define MAXRELOCS 2
+  struct elf32_csky_stub_hash_entry *stub_entry;
+  struct bfd_link_info *info;
+  asection *stub_sec;
+  bfd *stub_bfd;
+  bfd_byte *loc;
+  bfd_vma sym_value;
+  int template_size;
+  int size;
+  const insn_sequence *template_sequence;
+  int i;
+  struct csky_elf_link_hash_table * globals;
+  int stub_reloc_idx[MAXRELOCS] = {-1, -1};
+  int stub_reloc_offset[MAXRELOCS] = {0, 0};
+  int nrelocs = 0;
+  struct elf_link_hash_entry *h = NULL;
+
+  /* Massage our args to the form they really have.  */
+  stub_entry = (struct elf32_csky_stub_hash_entry *)gen_entry;
+  info = (struct bfd_link_info *) in_arg;
+
+  globals = csky_elf_hash_table (info);
+  if (globals == NULL)
+    return FALSE;
+  stub_sec = stub_entry->stub_sec;
+
+  /* Make a note of the offset within the stubs for this entry.  */
+  stub_entry->stub_offset = stub_sec->size;
+  loc = stub_sec->contents + stub_entry->stub_offset;
+
+  stub_bfd = stub_sec->owner;
+
+  /* This is the address of the stub destination.  */
+  h = &stub_entry->h->elf;
+  if (sym_must_create_stub (h, info)
+      && !(bfd_link_pic (info)
+	   && h->root.type == bfd_link_hash_defweak
+	   && h->def_regular
+	   && !h->def_dynamic))
+    sym_value = 0;
+  else
+    sym_value = (stub_entry->target_value
+		 + stub_entry->target_section->output_offset
+		 + stub_entry->target_section->output_section->vma);
+
+  template_sequence = stub_entry->stub_template;
+  template_size = stub_entry->stub_template_size;
+
+  size = 0;
+  for (i = 0; i < template_size; i++)
+    switch (template_sequence[i].type)
+      {
+      case INSN16:
+	bfd_put_16 (stub_bfd, (bfd_vma) template_sequence[i].data,
+		    loc + size);
+	size += 2;
+	break;
+      case INSN32:
+	csky_put_insn_32 (stub_bfd, (bfd_vma) template_sequence[i].data,
+			  loc + size);
+	size += 4;
+	break;
+      case DATA_TYPE:
+	bfd_put_32 (stub_bfd, (bfd_vma) template_sequence[i].data,
+		    loc + size);
+	stub_reloc_idx[nrelocs] = i;
+	stub_reloc_offset[nrelocs++] = size;
+	size += 4;
+	break;
+      default:
+	BFD_FAIL ();
+	return FALSE;
+      }
+  stub_sec->size += size;
+
+  /* Stub size has already been computed in csky_size_one_stub. Check
+     consistency.  */
+  BFD_ASSERT (size == stub_entry->stub_size);
+
+  /* Assume there is at least one and at most MAXRELOCS entries to relocate
+     in each stub.  */
+  BFD_ASSERT (nrelocs != 0 && nrelocs <= MAXRELOCS);
+
+  for (i = 0; i < nrelocs; i++)
+    {
+      if (sym_must_create_stub (h, info))
+	{
+	  Elf_Internal_Rela outrel;
+	  asection * sreloc = globals->elf.srelgot;
+
+	  outrel.r_offset = stub_entry->stub_offset + stub_reloc_offset[i];
+	  outrel.r_info =
+	    ELF32_R_INFO (h->dynindx,
+			  template_sequence[stub_reloc_idx[i]].r_type);
+	  outrel.r_addend = template_sequence[stub_reloc_idx[i]].reloc_addend;
+
+	  loc = sreloc->contents;
+	  loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
+
+	  if (loc != NULL)
+	    bfd_elf32_swap_reloca_out (info->output_bfd, &outrel, loc);
+	}
+      _bfd_final_link_relocate (elf32_csky_howto_from_type
+				  (template_sequence[stub_reloc_idx[i]].r_type),
+				stub_bfd, stub_sec, stub_sec->contents,
+				stub_entry->stub_offset + stub_reloc_offset[i],
+				sym_value + stub_entry->target_addend,
+				template_sequence[stub_reloc_idx[i]].reloc_addend);
+    }
+
+  return TRUE;
+#undef MAXRELOCS
+}
+
+/* Build all the stubs associated with the current output file.  The
+   stubs are kept in a hash table attached to the main linker hash
+   table.  We also set up the .plt entries for statically linked PIC
+   functions here.  This function is called via arm_elf_finish in the
+   linker.  */
+
+bfd_boolean
+elf32_csky_build_stubs (struct bfd_link_info *info)
+{
+  asection *stub_sec;
+  struct bfd_hash_table *table;
+  struct csky_elf_link_hash_table *htab;
+
+  htab = csky_elf_hash_table (info);
+
+  if (htab == NULL)
+    return FALSE;
+
+  for (stub_sec = htab->stub_bfd->sections;
+       stub_sec != NULL;
+       stub_sec = stub_sec->next)
+    {
+      bfd_size_type size;
+
+      /* Ignore non-stub sections.  */
+      if (!strstr (stub_sec->name, STUB_SUFFIX))
+	continue;
+
+      /* Allocate memory to hold the linker stubs.  */
+      size = stub_sec->size;
+      stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
+      if (stub_sec->contents == NULL && size != 0)
+	return FALSE;
+      stub_sec->size = 0;
+    }
+
+  /* Build the stubs as directed by the stub hash table.  */
+  table = &htab->stub_hash_table;
+  bfd_hash_traverse (table, csky_build_one_stub, info);
+
+  return TRUE;
+}
+
+/* Set up various things so that we can make a list of input sections
+   for each output section included in the link.  Returns -1 on error,
+   0 when no stubs will be needed, and 1 on success.  */
+int elf32_csky_setup_section_lists (bfd *output_bfd,
+				    struct bfd_link_info *info)
+{
+  bfd *input_bfd;
+  unsigned int bfd_count;
+  unsigned int top_id, top_index;
+  asection *section;
+  asection **input_list, **list;
+  bfd_size_type amt;
+  struct csky_elf_link_hash_table *htab = csky_elf_hash_table (info);
+
+  if (!htab)
+    return 0;
+  if (! is_elf_hash_table (htab))
+    return 0;
+  
+  /* Count the number of input BFDs and find the top input section id.  */
+  for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
+       input_bfd != NULL;
+       input_bfd = input_bfd->link.next)
+    {
+      bfd_count += 1;
+      for (section = input_bfd->sections;
+	   section != NULL;
+	   section = section->next)
+	if (top_id < section->id)
+	  top_id = section->id;
+    }
+  htab->bfd_count = bfd_count;
+  amt = sizeof (struct map_stub) * (top_id + 1);
+  htab->stub_group = bfd_zmalloc (amt);
+  if (htab->stub_group == NULL)
+    return -1;
+
+  /* We can't use output_bfd->section_count here to find the top output
+     section index as some sections may have been removed, and
+     _bfd_strip_section_from_output doesn't renumber the indices.  */
+  for (section = output_bfd->sections, top_index = 0;
+       section != NULL;
+       section = section->next)
+    if (top_index < section->index)
+      top_index = section->index;
+  htab->top_index = top_index;
+  amt = sizeof (asection *) * (top_index + 1);
+  input_list = bfd_malloc (amt);
+  htab->input_list = input_list;
+  if (input_list == NULL)
+    return -1;
+  /* For sections we aren't interested in, mark their entries with a
+     value we can check later.  */
+  list = input_list + top_index;
+  do
+    *list = bfd_abs_section_ptr;
+  while (list-- != input_list);
+  for (section = output_bfd->sections;
+       section != NULL;
+       section = section->next)
+    if ((section->flags & SEC_CODE) != 0)
+      input_list[section->index] = NULL;
+  
+  return 1;
+}
+
+static bfd_reloc_status_type
+csky_relocate_contents (reloc_howto_type *howto,
+			bfd *input_bfd,
+			long relocation,
+			bfd_byte *location)
+{
+  int size;
+  bfd_vma x = 0;
+  bfd_reloc_status_type flag;
+  unsigned int rightshift = howto->rightshift;
+  unsigned int bitpos = howto->bitpos;
+
+  /* If the size is negative, negate RELOCATION. This isn't very
+     general.  */
+  if (howto->size < 0)
+    relocation = -relocation;
+
+  /* FIXME: these macros should be defined at file head or head file head.  */
+#define CSKY_INSN_ADDI_TO_SUBI        0x04000000
+#define CSKY_INSN_MOV_RTB             0xc41d4820   // mov32 rx, r29, 0
+#define CSKY_INSN_MOV_RDB             0xc41c4820   // mov32 rx, r28, 0
+#define CSKY_INSN_GET_ADDI_RZ(x)      (((x) & 0x03e00000) >> 21)
+#define CSKY_INSN_SET_MOV_RZ(x)       ((x) & 0x0000001f)
+#define CSKY_INSN_JSRI_TO_LRW         0xea9a0000
+#define CSKY_INSN_JSR_R26             0xe8fa0000
+
+  /* Get the value we are going to relocate.  */
+  size = bfd_get_reloc_size (howto);
+  switch (size)
+    {
+    default:
+    case 0:
+      abort ();
+    case 1:
+      x = bfd_get_8 (input_bfd, location);
+      break;
+    case 2:
+      x = bfd_get_16 (input_bfd, location);
+      break;
+    case 4:
+      if (need_reverse_bits)
+	{
+	  x = csky_get_insn_32 (input_bfd, location);
+	  
+	  if (R_CKCORE_DOFFSET_LO16 == howto->type)
+	    {
+	      if ((signed) relocation < 0)
+		{
+		  x |= CSKY_INSN_ADDI_TO_SUBI;
+		  relocation = -relocation;
+		}
+	      else if (0 == relocation)
+		x = (CSKY_INSN_MOV_RDB |
+		     CSKY_INSN_SET_MOV_RZ (CSKY_INSN_GET_ADDI_RZ (x)));
+	    }
+	  else if (R_CKCORE_TOFFSET_LO16 == howto->type)
+	    {
+	      if ((signed) relocation < 0)
+		{
+		  x |= CSKY_INSN_ADDI_TO_SUBI;
+		  relocation = -relocation;
+		}
+	      else if (0 == relocation)
+		x = (CSKY_INSN_MOV_RTB |
+		     CSKY_INSN_SET_MOV_RZ (CSKY_INSN_GET_ADDI_RZ (x)));
+	    }
+	}
+      else
+	x = bfd_get_32 (input_bfd, location);
+      break;
+    }
+  /* Check for overflow.  FIXME: We may drop bits during the addition
+     which we don't check for.  We must either check at every single
+     operation, which would be tedious, or we must do the computations
+     in a type larger than bfd_vma, which would be inefficient.  */
+  flag = bfd_reloc_ok;
+  if (howto->complain_on_overflow != complain_overflow_dont)
+    {
+      int addrmask;
+      int fieldmask;
+      int signmask;
+      int ss;
+      int a;
+      int b;
+      int sum;
+      /* Get the values to be added together.  For signed and unsigned
+	 relocations, we assume that all values should be truncated to
+	 the size of an address.  For bitfields, all the bits matter.
+	 See also bfd_check_overflow.  */
+#define N_ONES(n)      (((((bfd_vma) 1 << ((n) - 1)) - 1) << 1) | 1)
+      fieldmask = N_ONES (howto->bitsize);
+      signmask  = ~fieldmask;
+      addrmask  = N_ONES (bfd_arch_bits_per_address (input_bfd)) | fieldmask;
+      a = (relocation & addrmask) >> rightshift;
+      if (read_content_substitute)
+	x = read_content_substitute;
+      b = (x & howto->src_mask & addrmask) >> bitpos;
+
+      switch (howto->complain_on_overflow)
+	{
+	case complain_overflow_signed:
+	  /* If any sign bits are set, all sign bits must be set.
+	     That is, A must be a valid negative address after
+	     shifting.  */
+	  signmask = ~(fieldmask >> 1);
+	  
+	case complain_overflow_bitfield:
+	  /* Much like the signed check, but for a field one bit
+	     wider.  We allow a bitfield to represent numbers in the
+	     range -2**n to 2**n-1, where n is the number of bits in the
+	     field.  Note that when bfd_vma is 32 bits, a 32-bit reloc
+	     can't overflow, which is exactly what we want.  */
+	  ss = a & signmask;
+	  if (ss != 0 && ss != ((addrmask >> rightshift) & signmask))
+	    flag = bfd_reloc_overflow;
+	  /* We only need this next bit of code if the sign bit of B
+	     is below the sign bit of A.  This would only happen if
+	     SRC_MASK had fewer bits than BITSIZE.  Note that if
+	     SRC_MASK has more bits than BITSIZE, we can get into
+	     trouble; we would need to verify that B is in range, as
+	     we do for A above.  */
+	  ss = ((~howto->src_mask) >> 1) & howto->src_mask;
+	  ss >>= bitpos;
+	  
+	  /* Set all the bits above the sign bit.  */
+	  b = (b ^ ss) - ss;
+	  
+	  /* Now we can do the addition.  */
+	  sum = a + b;
+	  
+	  /* See if the result has the correct sign.  Bits above the
+	     sign bit are junk now; ignore them.  If the sum is
+	     positive, make sure we did not have all negative inputs;
+	     if the sum is negative, make sure we did not have all
+	     positive inputs.  The test below looks only at the sign
+	     bits, and it really just
+	     SIGN (A) == SIGN (B) && SIGN (A) != SIGN (SUM)
+	     
+	     We mask with addrmask here to explicitly allow an address
+	     wrap-around.  The Linux kernel relies on it, and it is
+	     the only way to write assembler code which can run when
+	     loaded at a location 0x80000000 away from the location at
+	     which it is linked.  */
+	  
+	  if (((~(a ^ b)) & (a ^ sum)) & signmask & addrmask)
+	    flag = bfd_reloc_overflow;
+	  break;
+	case complain_overflow_unsigned:
+	  /* Checking for an unsigned overflow is relatively easy:
+	     trim the addresses and add, and trim the result as well.
+	     Overflow is normally indicated when the result does not
+	     fit in the field.  However, we also need to consider the
+	     case when, e.g., fieldmask is 0x7fffffff or smaller, an
+	     input is 0x80000000, and bfd_vma is only 32 bits; then we
+	     will get sum == 0, but there is an overflow, since the
+	     inputs did not fit in the field.  Instead of doing a
+	     separate test, we can check for this by or-ing in the
+	     operands when testing for the sum overflowing its final
+	     field.  */
+	  sum = (a + b) & addrmask;
+	  if ((a | b | sum) & signmask)
+	    flag = bfd_reloc_overflow;
+	  break;
+	default:
+	  abort ();
+	}
+      
+    }
+  /* Put RELOCATION in the right bits.  */
+  relocation >>= (bfd_vma) rightshift;
+
+  if ((howto->type == R_CKCORE_DOFFSET_LO16
+       || howto->type == R_CKCORE_TOFFSET_LO16)
+      && relocation == 0)
+    /* Do nothing lsli32 rx, rz, 0.  */
+    ;
+  else
+    {
+      /* Fir V1, all this relocation must be x -1.  */
+      if (howto->type == R_CKCORE_PCREL_IMM11BY2
+	  || howto->type == R_CKCORE_PCREL_JSR_IMM11BY2
+	  || howto->type == R_CKCORE_DOFFSET_LO16
+	  || howto->type == R_CKCORE_TOFFSET_LO16)
+	relocation -= 1;
+      else if (howto->type == R_CKCORE_PCREL_IMM7BY4)
+	relocation = (relocation & 0x1f) + ((relocation << 3) & 0x300);
+      else if (howto->type == R_CKCORE_PCREL_FLRW_IMM8BY4)
+	relocation
+	  = ((relocation << 4) & 0xf0) + ((relocation << 17) & 0x1e00000);
+      else if (howto->type == R_CKCORE_NOJSRI)
+	{
+	  x = (x & howto->dst_mask) | CSKY_INSN_JSRI_TO_LRW;
+	  relocation = 0;
+	  csky_put_insn_32 (input_bfd, CSKY_INSN_JSR_R26, location + 4);
+	}
+
+      relocation <<= (bfd_vma) bitpos;
+      /* Add RELOCATION to the right bits of X.  */
+      x = ((x & ~howto->dst_mask)
+	   | (((x & howto->src_mask) + relocation) & howto->dst_mask));
+    }
+  /* Put the relocated value back in the object file.  */
+  switch (size)
+    {
+    default:
+      abort ();
+    case 1:
+      bfd_put_8 (input_bfd, x, location);
+      break;
+    case 2:
+      bfd_put_16 (input_bfd, x, location);
+      break;
+    case 4:
+      if (need_reverse_bits)
+	csky_put_insn_32 (input_bfd, x, location);
+      else
+	bfd_put_32 (input_bfd, x, location);
+      break;
+    }
+  return flag;
+}
+
+/* Look up an entry in the stub hash. Stub entries are cached because
+   creating the stub name takes a bit of time.  */
+static struct elf32_csky_stub_hash_entry *
+elf32_csky_get_stub_entry (const asection *input_section,
+			   const asection *sym_sec,
+			   struct elf_link_hash_entry *hash,
+			   const Elf_Internal_Rela *rel,
+			   struct csky_elf_link_hash_table *htab)
+{
+  struct elf32_csky_stub_hash_entry *stub_entry;
+  struct csky_elf_link_hash_entry *h
+    = (struct csky_elf_link_hash_entry *) hash;
+  const asection *id_sec;
+
+  if ((input_section->flags & SEC_CODE) == 0)
+    return NULL;
+
+  /* If this input section is part of a group of sections sharing one
+     stub section, then use the id of the first section in the group.
+     Stub names need to include a section id, as there may well be
+     more than one stub used to reach say, printf, and we need to
+     distinguish between them.  */
+  id_sec = htab->stub_group[input_section->id].link_sec;
+  if (h != NULL && h->stub_cache != NULL
+      && h->stub_cache->h == h && h->stub_cache->id_sec == id_sec)
+    stub_entry = h->stub_cache;
+  else
+    {
+      char *stub_name;
+      stub_name = elf32_csky_stub_name (id_sec, sym_sec, h, rel);
+      if (stub_name == NULL)
+	return NULL;
+      stub_entry = csky_stub_hash_lookup (&htab->stub_hash_table,
+					  stub_name, FALSE, FALSE);
+      if (h != NULL)
+	h->stub_cache = stub_entry;
+      free (stub_name);
+    }
+
+  return stub_entry;
+}
+
+static bfd_reloc_status_type
+csky_final_link_relocate (reloc_howto_type *howto,
+			  bfd *input_bfd,
+			  asection *input_section,
+			  bfd_byte *contents,
+			  bfd_vma address,
+			  bfd_vma value,
+			  bfd_vma addend)
+{
+  bfd_vma relocation;
+
+  /* Sanity check the address.  */
+  if (address > bfd_get_section_limit (input_bfd, input_section))
+    return bfd_reloc_outofrange;
+
+  /* This function assumes that we are dealing with a basic relocation
+     against a symbol. We want to compute the value of the symbol to
+     relocate to. This is just VALUE, the value of the symbol,
+     plus ADDEND, any addend associated with the reloc.  */
+  relocation = value + addend;
+
+  /* If the relocation is PC relative, we want to set RELOCATION to
+     the distance between the symbol (currently in RELOCATION) and the
+     location we are relocating. Some targets (e.g., i386-aout)
+     arrange for the contents of the section to be the negative of the
+     offset of the location within the section; for such targets
+     pcrel_offset is FALSE.  Other targets (e.g., m88kbcs or ELF)
+     simply leave the contents of the section as zero; for such
+     targets pcrel_offset is TRUE.  If pcrel_offset is FALSE we do not
+     need to subtract out the offset of the location within the
+     section (which is just ADDRESS).  */
+  if (howto->pc_relative)
+    {
+      relocation -= (input_section->output_section->vma
+		     + input_section->output_offset);
+      if (howto->pcrel_offset)
+	relocation -= address;
+    }
+
+  return csky_relocate_contents (howto, input_bfd, relocation,
+				 contents + address);
+
+}
+
+/* Return the base VMA address which should be subtracted from real addresses
+   when resolving @dtpoff relocation.
+   This is PT_TLS segment p_vaddr.  */
+
+static bfd_vma
+dtpoff_base (struct bfd_link_info *info)
+{
+  /* If tls_sec is NULL, we should have signalled an error already.  */
+  if (elf_hash_table (info)->tls_sec == NULL)
+    return 0;
+  return elf_hash_table (info)->tls_sec->vma;
+}
+
+/* Return the relocation value for @tpoff relocation
+   if STT_TLS virtual address is ADDRESS.  */
+
+static bfd_vma
+tpoff (struct bfd_link_info *info, bfd_vma address)
+{
+  struct elf_link_hash_table *htab = elf_hash_table (info);
+  bfd_vma base;
+
+  /* If tls_sec is NULL, we should have signalled an error already.  */
+  if (htab->tls_sec == NULL)
+    return 0;
+  base = align_power ((bfd_vma) TCB_SIZE, htab->tls_sec->alignment_power);
+  return address - htab->tls_sec->vma + base;
+}
+
+/* Relocate a csky section.  */
+
+static bfd_boolean
+csky_elf_relocate_section (bfd *                  output_bfd,
+			   struct bfd_link_info * info,
+			   bfd *                  input_bfd,
+			   asection *             input_section,
+			   bfd_byte *             contents,
+			   Elf_Internal_Rela *    relocs,
+			   Elf_Internal_Sym *     local_syms,
+			   asection **            local_sections)
+{
+  Elf_Internal_Shdr *symtab_hdr;
+  struct elf_link_hash_entry **sym_hashes;
+  Elf_Internal_Rela *rel;
+  Elf_Internal_Rela *relend;
+  const char *name;
+  bfd_boolean ret = TRUE;
+  struct csky_elf_link_hash_table * htab;
+  bfd_vma *local_got_offsets = elf_local_got_offsets (input_bfd);
+
+  htab = csky_elf_hash_table (info);
+  if (htab == NULL)
+    return FALSE;
+
+  symtab_hdr = & elf_symtab_hdr (input_bfd);
+  sym_hashes = elf_sym_hashes (input_bfd);
+
+  rel = relocs;
+  relend = relocs + input_section->reloc_count;
+  for (; rel < relend; rel++)
+    {
+      enum elf_csky_reloc_type     r_type
+	= (enum elf_csky_reloc_type) ELF32_R_TYPE (rel->r_info);
+      unsigned long                r_symndx;
+      reloc_howto_type *           howto;
+      Elf_Internal_Sym *           sym;
+      asection *                   sec;
+      bfd_vma                      relocation;
+      bfd_vma                      off;
+      struct elf_link_hash_entry * h;
+      bfd_vma                      addend = (bfd_vma)rel->r_addend;
+      bfd_reloc_status_type        r = bfd_reloc_ok;
+      bfd_boolean                  unresolved_reloc = FALSE;
+      int                          do_final_relocate = TRUE;
+      bfd_signed_vma disp;
+
+      /* Ignore these relocation types:
+	 R_CKCORE_GNU_VTINHERIT, R_CKCORE_GNU_VTENTRY.  */
+      if (r_type == R_CKCORE_GNU_VTINHERIT || r_type == R_CKCORE_GNU_VTENTRY)
+	continue;
+
+      if ((unsigned) r_type >= (unsigned) R_CKCORE_MAX)
+	{
+	  /* The r_type is error, not support it.  */
+	  /* xgettext:c-format */
+	  _bfd_error_handler (_("%pB: Unknown relocation type %ud\n"),
+			      input_bfd, (unsigned) r_type);
+	  bfd_set_error (bfd_error_bad_value);
+	  ret = FALSE;
+	  continue;
+	}
+
+      howto = &csky_elf_howto_table[(int) r_type];
+
+      r_symndx = ELF32_R_SYM(rel->r_info);
+      h = NULL;
+      sym = NULL;
+      sec = NULL;
+      unresolved_reloc = FALSE;
+
+      if (r_symndx < symtab_hdr->sh_info)
+	{
+	  /* Get symbol table entry.  */
+	  sym = local_syms + r_symndx;
+	  sec = local_sections[r_symndx];
+	  relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
+	  addend = (bfd_vma)rel->r_addend;
+	}
+      else
+	{
+	  bfd_boolean warned, ignored;
+
+	  RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
+				   r_symndx, symtab_hdr, sym_hashes,
+				   h, sec, relocation,
+				   unresolved_reloc, warned, ignored);
+	}
+
+      if (sec != NULL && discarded_section (sec))
+	{
+	  /* For relocs against symbols from removed linkonce sections,
+	     or sections discarded by a linker script, we just want the
+	     section contents zeroed.  Avoid any special processing.
+	     And if the symbol is referenced in '.csky_stack_size' section,
+	     set the address to SEC_DISCARDED(0xffffffff).  */
+#if 0
+	  /* The .csky_stack_size section is just for callgraph.  */
+	  if (strcmp (input_section->name, ".csky_stack_size") == 0)
+	    {
+/* FIXME: it should define in head file.  */
+#define SEC_DISCARDED   0xffffffff
+	      bfd_put_32 (input_bfd, SEC_DISCARDED, contents + rel->r_offset);
+	      rel->r_info = 0;
+	      rel->r_addend = 0;
+	      continue;
+	    }
+	  else
+#endif
+	    RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
+					     rel, 1, relend, howto, 0,
+					     contents);
+	}
+
+      if (bfd_link_relocatable (info))
+	continue;
+
+      read_content_substitute = 0;
+
+      /* Final link.  */
+      disp = (relocation
+	      + (bfd_signed_vma) addend
+	      - input_section->output_section->vma
+	      - input_section->output_offset
+	      - rel->r_offset);
+/* It is for ck8xx.  */
+#define CSKY_INSN_BSR32   0xe0000000
+/* It is for ck5xx/ck6xx.  */
+#define CSKY_INSN_BSR16   0xf800
+#define within_range(x, L)  (-(1 << (L - 1)) < (x) && (x) < (1 << (L -1)) - 2)
+      switch (howto->type)
+	{
+	case R_CKCORE_PCREL_IMM18BY2:
+	  /* When h is NULL, means the instruction written as
+	     grs rx, imm32
+	     if the highest bit is set, prevent the high 32bits
+	     turn to 0xffffffff when signed extern in 64bit
+	     host machine.  */
+	  if (h == NULL && (addend & 0x80000000))
+	    addend &= 0xffffffff;
+	  break;
+	case R_CKCORE_GOT12:
+	case R_CKCORE_PLT12:
+	case R_CKCORE_GOT_HI16:
+	case R_CKCORE_GOT_LO16:
+	case R_CKCORE_PLT_HI16:
+	case R_CKCORE_PLT_LO16:
+	case R_CKCORE_GOT32:
+	case R_CKCORE_GOT_IMM18BY4:
+	  /* Relocation is to the entry for this symbol in the global
+	     offset table.  */
+	  BFD_ASSERT (htab->elf.sgot != NULL);
+	  if (h != NULL)
+	    {
+	      /* Global symbol is defined by other modules.  */
+	      bfd_boolean dyn;
+	      off = h->got.offset;
+	      dyn = htab->elf.dynamic_sections_created;
+	      if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
+						    bfd_link_pic (info), h)
+		  || (bfd_link_pic (info) && SYMBOL_REFERENCES_LOCAL (info,h))
+		  || (ELF_ST_VISIBILITY(h->other)
+		      && h->root.type == bfd_link_hash_undefweak))
+		{
+		  /* This is actually a static link, or it is a
+		     -Bsymbolic link and the symbol is defined
+		     locally, or the symbol was forced to be local
+		     because of a version file.  We must initialize
+		     this entry in the global offset table.  Since the
+		     offset must always be a multiple of 4, we use the
+		     least significant bit to record whether we have
+		     initialized it already.
+		     When doing a dynamic link, we create a .rela.dyn
+		     relocation entry to initialize the value.  This
+		     is done in the finish_dynamic_symbol routine. FIXME  */
+		  if (off & 1)
+		    off &= ~1;
+		  else
+		    {
+		      bfd_put_32 (output_bfd, relocation,
+				  htab->elf.sgot->contents + off);
+		      h->got.offset |= 1;
+		    }
+		}
+	      else
+		unresolved_reloc = FALSE;
+	    } /* End if h != NULL.  */
+	  else
+	    {
+	      BFD_ASSERT (local_got_offsets != NULL);
+	      off = local_got_offsets[r_symndx];
+	      
+	      /* The offset must always be a multiple of 4.  We use
+		 the least significant bit to record whether we have
+		 already generated the necessary reloc.  */
+	      if (off & 1)
+		off &= ~1;
+	      else
+		{
+		  bfd_put_32 (output_bfd, relocation,
+			      htab->elf.sgot->contents + off);
+		  if (bfd_link_pic (info))
+		    {
+		      asection *srelgot;
+		      Elf_Internal_Rela outrel;
+		      bfd_byte *loc;
+		      
+		      srelgot = htab->elf.srelgot;
+		      BFD_ASSERT (srelgot != NULL);
+		      
+		      outrel.r_offset
+			= (htab->elf.sgot->output_section->vma
+			   + htab->elf.sgot->output_offset  + off);
+		      outrel.r_info = ELF32_R_INFO (0, R_CKCORE_RELATIVE);
+		      outrel.r_addend = relocation;
+		      loc = srelgot->contents;
+		      loc += (srelgot->reloc_count++
+			      * sizeof (Elf32_External_Rela));
+		      if (loc != NULL)
+			bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
+		    }
+		  local_got_offsets[r_symndx] |= 1;
+		}
+	    }
+	  relocation = htab->elf.sgot->output_offset + off;
+	  break;
+	  
+	case R_CKCORE_GOTOFF_IMM18:
+	case R_CKCORE_GOTOFF:
+	case R_CKCORE_GOTOFF_HI16:
+	case R_CKCORE_GOTOFF_LO16:
+	  /* Relocation is relative to the start of the global offset
+	     table.  */
+	  /* Note that sgot->output_offset is not involved in this
+	     calculation.  We always want the start of .got.  If we
+	     defined _GLOBAL_OFFSET_TABLE in a different way, as is
+	     permitted by the ABI, we might have to change this
+	     calculation.  */
+	  relocation -= htab->elf.sgot->output_section->vma;
+	  break;
+	  
+	case R_CKCORE_GOTPC:
+	case R_CKCORE_GOTPC_HI16:
+	case R_CKCORE_GOTPC_LO16:
+	  /* Use global offset table as symbol value.  */
+	  relocation = htab->elf.sgot->output_section->vma;
+	  addend = -addend;
+	  unresolved_reloc = FALSE;
+	  break;
+	  
+	case R_CKCORE_DOFFSET_IMM18:
+	case R_CKCORE_DOFFSET_IMM18BY2:
+	case R_CKCORE_DOFFSET_IMM18BY4:
+	  {
+	    asection *sdata = bfd_get_section_by_name (output_bfd, ".data");
+	    relocation -= sdata->output_section->vma;
+	  }
+	  break;
+	  
+	case R_CKCORE_DOFFSET_LO16:
+	  {
+	    asection *sdata = bfd_get_section_by_name (output_bfd, ".data");
+	    relocation -= sdata->output_section->vma;
+	  }
+	  break;
+	  
+	case R_CKCORE_TOFFSET_LO16:
+	  {
+	    asection *stext = bfd_get_section_by_name (output_bfd, ".text");
+	    if (stext)
+	      relocation -= stext->output_section->vma;
+	  }
+	  break;
+	  
+	case R_CKCORE_PLT_IMM18BY4:
+	case R_CKCORE_PLT32:
+	  /* Relocation is to the entry for this symbol in the
+	     procedure linkage table.  */
+	  
+	  /* Resolve a PLT32 reloc against a local symbol directly,
+	     without using the procedure linkage table.  */
+	  if (h == NULL)
+	    break;
+	  
+	  if (h->plt.offset == (bfd_vma) -1 || htab->elf.splt == NULL)
+	    {
+	      /* We didn't make a PLT entry for this symbol.  This
+		 happens when statically linking PIC code, or when
+		 using -Bsymbolic.  */
+	      if (h->got.offset != (bfd_vma) -1)
+		{
+		  bfd_boolean dyn;
+		  
+		  off = h->got.offset;
+		  dyn = htab->elf.dynamic_sections_created;
+		  if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
+							bfd_link_pic (info), h)
+		      || (bfd_link_pic (info)
+			  && SYMBOL_REFERENCES_LOCAL (info, h))
+		      || (ELF_ST_VISIBILITY (h->other)
+			  && h->root.type == bfd_link_hash_undefweak))
+		    {
+		      /* This is actually a static link, or it is a
+			 -Bsymbolic link and the symbol is defined
+			 locally, or the symbol was forced to be local
+			 because of a version file.  We must initialize
+			 this entry in the global offset table.  Since the
+			 offset must always be a multiple of 4, we use the
+			 least significant bit to record whether we have
+			 initialized it already.
+			 
+			 When doing a dynamic link, we create a .rela.dyn
+			 relocation entry to initialize the value.  This
+			 is done in the finish_dynamic_symbol routine.
+			 FIXME!  */
+		      if (off & 1)
+			off &= ~1;
+		      else
+			h->got.offset |= 1;
+		    }
+		  bfd_put_32 (output_bfd, relocation,
+			      htab->elf.sgot->contents + off);
+		  
+		  relocation = off + htab->elf.sgot->output_offset;
+		}
+	      break;
+	    }
+	  /* The reloction is the got offset.  */
+	  if (bfd_csky_abi (output_bfd) == CSKY_ABI_V2)
+	    relocation = (h->plt.offset / PLT_ENTRY_SIZE + 2) * 4;
+	  else
+	    relocation = (h->plt.offset / PLT_ENTRY_SIZE_P + 2) * 4;
+	  unresolved_reloc = FALSE;
+	  break;
+
+	case R_CKCORE_PCREL_IMM26BY2:
+	case R_CKCORE_PCREL_JSR_IMM26BY2:
+	case R_CKCORE_PCREL_JSR_IMM11BY2:
+	case R_CKCORE_PCREL_IMM11BY2:
+	case R_CKCORE_CALLGRAPH:
+	  /* Emit callgraph information first.  */
+	  /* TODO: deal with callgraph.  */
+	  if (ELF32_R_TYPE (rel->r_info) == R_CKCORE_CALLGRAPH)
+	    break;
+	  /* Some reloc need further handling.  */
+	  /* h == NULL means the symbol is a local symbol,
+	     r_symndx == 0 means the symbol is 'ABS' and
+	     the relocation is already handled in assemble,
+	     here just use for callgraph.  */
+	  /* TODO: deal with callgraph.  */
+	  if (h == NULL && r_symndx == 0)
+	    {
+	      do_final_relocate = FALSE;
+	      break;
+	    }
+	  
+	  /* Ignore weak references to undefined symbols.  */
+	  if (h != NULL && h->root.type == bfd_link_hash_undefweak)
+	    {
+	      do_final_relocate = FALSE;
+	      break;
+	    }
+	  
+	  /* Using branch stub.  */
+	  if (use_branch_stub == TRUE
+	      && ELF32_R_TYPE (rel->r_info) == R_CKCORE_PCREL_IMM26BY2)
+	    {
+	      struct elf32_csky_stub_hash_entry *stub_entry = NULL;
+	      if (sym_must_create_stub (h, info))
+		stub_entry = elf32_csky_get_stub_entry (input_section,
+							input_section,
+							h, rel, htab);
+	      else if (disp > BSR_MAX_FWD_BRANCH_OFFSET
+		       || disp < BSR_MAX_BWD_BRANCH_OFFSET)
+		stub_entry = elf32_csky_get_stub_entry (input_section,
+							input_section,
+							h, rel, htab);
+	      if (stub_entry != NULL)
+		relocation
+		  = (stub_entry->stub_offset
+		     + stub_entry->stub_sec->output_offset
+		     + stub_entry->stub_sec->output_section->vma);
+	      break;
+	    }
+	  
+	  else if (h == NULL
+		   || (h->root.type == bfd_link_hash_defined
+		       && h->dynindx == -1)
+		   || ((h->def_regular && !h->def_dynamic)
+		       && (h->root.type != bfd_link_hash_defweak
+			   || ! bfd_link_pic (info))))
+	    {
+	      if (ELF32_R_TYPE (rel->r_info) == R_CKCORE_PCREL_JSR_IMM26BY2)
+		{
+		  if (within_range (disp, 26))
+		    {
+		      /* In range for BSR32.  */
+		      howto = &csky_elf_howto_table[R_CKCORE_PCREL_IMM26BY2];
+		      read_content_substitute = CSKY_INSN_BSR32;
+		    }
+		  else if (bfd_csky_arch (output_bfd) == CSKY_ARCH_810)
+		    /* if bsr32 cannot reach, generate
+		       "lrw r25, label; jsr r25" instead of
+		       jsri label.  */
+		    howto = &csky_elf_howto_table[R_CKCORE_NOJSRI];
+		} /* if ELF32_R_TYPE (rel->r_info)...  */
+	      else if (ELF32_R_TYPE (rel->r_info)
+		       == R_CKCORE_PCREL_JSR_IMM11BY2)
+		{
+		  if (within_range (disp, 11))
+		    {
+		      /* In range for BSR16.  */
+		      howto = &csky_elf_howto_table[R_CKCORE_PCREL_IMM11BY2];
+		      read_content_substitute = CSKY_INSN_BSR16;
+		    }
+		}
+	      break;
+	    } /* else if h == NULL...  */
+	  
+	  else if (bfd_csky_arch (output_bfd) == CSKY_ARCH_810
+		   && (ELF32_R_TYPE (rel->r_info)
+		       == R_CKCORE_PCREL_JSR_IMM26BY2))
+	      {
+		howto = &csky_elf_howto_table[R_CKCORE_NOJSRI];
+		break;
+	      }
+	  /* Other situation, h->def_dynamic == 1,
+	     undefined_symbol when output file is shared object, etc.  */
+	  
+	case R_CKCORE_ADDR_HI16:
+	case R_CKCORE_ADDR_LO16:
+	  if (bfd_link_pic (info)
+	      || (!bfd_link_pic (info)
+		  && h != NULL
+		  && h->dynindx != -1
+		  && !h->non_got_ref
+		  && ((h->def_dynamic && !h->def_regular)
+		      || (htab->elf.dynamic_sections_created
+			  && (h->root.type == bfd_link_hash_undefweak
+			      || h->root.type == bfd_link_hash_undefined
+			      || h->root.type == bfd_link_hash_indirect)))))
+	    {
+	      Elf_Internal_Rela outrel;
+	      bfd_boolean skip, relocate;
+	      bfd_byte *loc;
+	      
+	      /* When generating a shared object, these relocations
+		 are copied into the output file to be resolved at
+		 run time.  */
+	      skip = FALSE;
+	      relocate = FALSE;
+	      
+	      outrel.r_offset =
+		_bfd_elf_section_offset (output_bfd, info, input_section,
+					 rel->r_offset);
+	      if (outrel.r_offset == (bfd_vma) -1)
+		skip = TRUE;
+	      else if (outrel.r_offset == (bfd_vma) -2)
+		{
+		  skip = TRUE;
+		  relocate = TRUE;
+		}
+	      outrel.r_offset += (input_section->output_section->vma
+				  + input_section->output_offset);
+	      if (skip)
+		memset (&outrel, 0, sizeof (outrel));
+	      else if (h != NULL
+		       && h->dynindx != -1
+		       && (!bfd_link_pic (info)
+			   || (!SYMBOLIC_BIND (info, h)
+			       && h->root.type == bfd_link_hash_defweak)
+			   || !h->def_regular))
+		{
+		  outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
+		  outrel.r_addend = rel->r_addend;
+		}
+	      else
+		{
+		  /* This symbol is local, or marked to become local.  */
+		  relocate = TRUE;
+		  outrel.r_info = ELF32_R_INFO (0, r_type);
+		  outrel.r_addend = relocation + rel->r_addend;
+		}
+	      loc = htab->elf.srelgot->contents;
+	      loc += (htab->elf.srelgot->reloc_count++
+		      * sizeof (Elf32_External_Rela));
+	      
+	      if (loc != NULL)
+		bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
+	      
+	      /* If this reloc is against an external symbol, we do not
+		 want to diddle with the addend. Otherwise, we need to
+		 include the symbol value so that it becomes an addend
+		 for the dynamic reloc.  */
+	      if (!relocate)
+		continue;
+	    } /* if bfd_link_pic (info) ...  */
+	  break;
+
+	case R_CKCORE_ADDR32:
+	  /* r_symndx will be zero only for relocs against symbols
+	     from removed linkonce sections, or sections discarded
+	     by a linker script.
+	     This relocation don't nedd to handle, the value will
+	     be set to SEC_DISCARDED(0xffffffff).  */
+	  if (r_symndx == 0
+	      && strcmp (sec->name, ".csky_stack_size") == 0)
+	    {
+	      do_final_relocate = FALSE;
+	      break;
+	    }
+	  
+	  if (r_symndx == 0 || (input_section->flags & SEC_ALLOC) == 0)
+	    break;
+
+	  if (bfd_link_pic (info)
+	      || (h != NULL
+		  && h->dynindx != -1
+		  && ((h->def_dynamic && !h->def_regular)
+		      || (htab->elf.dynamic_sections_created
+			  && (h->root.type == bfd_link_hash_undefweak
+			      || h->root.type == bfd_link_hash_undefined
+			      || h->root.type == bfd_link_hash_indirect)))))
+	    {
+	      Elf_Internal_Rela outrel;
+	      bfd_boolean skip, relocate;
+	      bfd_byte *loc;
+	      
+	      /* When generating a shared object, these relocations
+		 are copied into the output file to be resolved at
+		 run time.  */
+	      skip = FALSE;
+	      relocate = FALSE;
+	      
+	      outrel.r_offset =
+		_bfd_elf_section_offset (output_bfd, info, input_section,
+					 rel->r_offset);
+	      
+	      if (outrel.r_offset == (bfd_vma) -1)
+		skip = TRUE;
+	      else if (outrel.r_offset == (bfd_vma) -2)
+		{
+		  skip = TRUE;
+		  relocate = TRUE;
+		}
+	      
+	      outrel.r_offset += (input_section->output_section->vma
+				  + input_section->output_offset);
+	      
+	      if (skip)
+		memset (&outrel, 0, sizeof (outrel));
+	      else if (h != NULL
+		       && h->dynindx != -1
+		       && (!bfd_link_pic (info)
+			   || (!SYMBOLIC_BIND (info, h)
+			       && h->root.type == bfd_link_hash_defweak)
+			   || !h->def_regular))
+		{
+		  outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
+		  outrel.r_addend = rel->r_addend;
+		}
+	      else
+		{
+		  /* This symbol is local, or marked to become local.  */
+		  outrel.r_info = ELF32_R_INFO (0, R_CKCORE_RELATIVE);
+		  outrel.r_addend = relocation + rel->r_addend;
+		}
+	      
+	      loc = htab->elf.srelgot->contents;
+	      loc += (htab->elf.srelgot->reloc_count++
+		      * sizeof (Elf32_External_Rela));
+	      
+	      if (loc != NULL)
+		bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
+	      
+	      /* If this reloc is against an external symbol, we do
+		 want to diddle with the addend. Otherwise, we need to
+		 include the symbol value so that it becomes an addend
+		 for the dynamic reloc.  */
+	      if (! relocate)
+		continue;
+	    }
+	  break;
+	  
+	case R_CKCORE_TLS_LDO32:
+	  relocation = relocation - dtpoff_base (info);
+	  break;
+	  
+	case R_CKCORE_TLS_LDM32:
+	  BFD_ASSERT (htab->elf.sgot != NULL);
+	  off = htab->tls_ldm_got.offset;
+	  if (off & 1)
+	    off &= ~1;
+	  else
+	    {
+	      /* If we don't know the module number,
+		 create a relocation for it.  */
+	      if (!bfd_link_executable (info))
+		{
+		  Elf_Internal_Rela outrel;
+		  bfd_byte *loc;
+		  
+		  BFD_ASSERT (htab->elf.srelgot != NULL);
+		  outrel.r_addend = 0;
+		  outrel.r_offset
+		    = (htab->elf.sgot->output_section->vma
+		       + htab->elf.sgot->output_offset + off);
+		  outrel.r_info = ELF32_R_INFO (0, R_CKCORE_TLS_DTPMOD32);
+		  bfd_put_32 (output_bfd, outrel.r_addend,
+			      htab->elf.sgot->contents + off);
+		  
+		  loc = htab->elf.srelgot->contents;
+		  loc += (htab->elf.srelgot->reloc_count++
+			  * sizeof (Elf32_External_Rela));
+		  if (loc)
+		    bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
+		}
+	      else
+		bfd_put_32 (output_bfd, 1,
+			    htab->elf.sgot->contents + off);
+	      htab->tls_ldm_got.offset |= 1;
+	    }
+	  relocation
+	    = (htab->elf.sgot->output_section->vma
+	       + htab->elf.sgot->output_offset + off
+	       - (input_section->output_section->vma
+		  + input_section->output_offset + rel->r_offset));
+	  break;
+	case R_CKCORE_TLS_LE32:
+	  if (bfd_link_dll (info))
+	    {
+	      _bfd_error_handler
+		/* xgettext:c-format */
+		(_("%pB(%pA+0x%#lx): R_CKCORE_TLS_LE32 relocation\
+		     not permitted in shared object"),
+		 input_bfd, input_section, rel->r_offset);
+	      return FALSE;
+	    }
+	  else
+	    relocation = tpoff (info, relocation);
+	  break;
+	case R_CKCORE_TLS_GD32:
+	case R_CKCORE_TLS_IE32:
+	  {
+	    int indx;
+	    char tls_type;
+	    
+	    BFD_ASSERT (htab->elf.sgot != NULL);
+	    
+	    indx = 0;
+	    if (h != NULL)
+	      {
+		bfd_boolean dyn;
+		dyn = htab->elf.dynamic_sections_created;
+		if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
+						     bfd_link_pic (info), h)
+		    && (!bfd_link_pic (info)
+			|| !SYMBOL_REFERENCES_LOCAL (info, h)))
+		  {
+		    unresolved_reloc = FALSE;
+		    indx = h->dynindx;
+		  }
+		off = h->got.offset;
+		tls_type = ((struct csky_elf_link_hash_entry *)h)->tls_type;
+	      }
+	    else
+	      {
+		BFD_ASSERT (local_got_offsets != NULL);
+		off = local_got_offsets[r_symndx];
+		tls_type = csky_elf_local_got_tls_type (input_bfd)[r_symndx];
+	      }
+	    
+	    BFD_ASSERT (tls_type != GOT_UNKNOWN);
+	    
+	    if (off & 1)
+	      off &= ~1;
+	    else
+	      {
+		bfd_boolean need_relocs = FALSE;
+		Elf_Internal_Rela outrel;
+		bfd_byte *loc = NULL;
+		int cur_off = off;
+		/* The GOT entries have not been initialized yet.  Do it
+		   now, and emit any relocations.  If both an IE GOT and a
+		   GD GOT are necessary, we emit the GD first.  */
+		if ((!bfd_link_executable (info) || indx != 0)
+		    && (h == NULL
+			|| (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
+			    && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
+			|| h->root.type != bfd_link_hash_undefined))
+		  {
+		    need_relocs = TRUE;
+		    BFD_ASSERT (htab->elf.srelgot != NULL);
+		    
+		    loc = htab->elf.srelgot->contents;
+		    loc += (htab->elf.srelgot->reloc_count
+			    * sizeof (Elf32_External_Rela));
+		  }
+		if (tls_type & GOT_TLS_GD)
+		  {
+		    if (need_relocs)
+		      {
+			outrel.r_addend = 0;
+			outrel.r_offset
+			  = (htab->elf.sgot->output_section->vma
+			     + htab->elf.sgot->output_offset
+			     + cur_off);
+			outrel.r_info
+			  = ELF32_R_INFO (indx, R_CKCORE_TLS_DTPMOD32);
+			bfd_put_32 (output_bfd, outrel.r_addend,
+				    htab->elf.sgot->contents + cur_off);
+			if (loc)
+			  bfd_elf32_swap_reloca_out (output_bfd,
+						     &outrel, loc);
+			loc += sizeof (Elf32_External_Rela);
+			htab->elf.srelgot->reloc_count++;
+			if (indx == 0)
+			  bfd_put_32 (output_bfd,
+				      relocation - dtpoff_base (info),
+				      (htab->elf.sgot->contents
+				       + cur_off + 4));
+			else
+			  {
+			    outrel.r_addend = 0;
+			    outrel.r_info
+			      = ELF32_R_INFO (indx, R_CKCORE_TLS_DTPOFF32);
+			    outrel.r_offset += 4;
+			    bfd_put_32 (output_bfd, outrel.r_addend,
+					(htab->elf.sgot->contents
+					 + cur_off + 4));
+			    outrel.r_info =
+			      ELF32_R_INFO (indx,
+					    R_CKCORE_TLS_DTPOFF32);
+			    if (loc)
+			      bfd_elf32_swap_reloca_out (output_bfd,
+							 &outrel,
+							 loc);
+			    htab->elf.srelgot->reloc_count++;
+			    loc += sizeof (Elf32_External_Rela);
+			  }
+			
+		      }
+		    else
+		      {
+			/* If are not emitting relocations for a
+			   general dynamic reference, then we must be in a
+			   static link or an executable link with the
+			   symbol binding locally.  Mark it as belonging
+			   to module 1, the executable.  */
+			bfd_put_32 (output_bfd, 1,
+				    htab->elf.sgot->contents + cur_off);
+			bfd_put_32 (output_bfd,
+				    relocation - dtpoff_base (info),
+				    htab->elf.sgot->contents
+				    + cur_off + 4);
+		      }
+		    cur_off += 8;
+		  }
+		if (tls_type & GOT_TLS_IE)
+		  {
+		    if (need_relocs)
+		      {
+			if (indx == 0)
+			  outrel.r_addend = relocation - dtpoff_base (info);
+			else
+			  outrel.r_addend = 0;
+			outrel.r_offset
+			  = (htab->elf.sgot->output_section->vma
+			     + htab->elf.sgot->output_offset + cur_off);
+			outrel.r_info
+			  = ELF32_R_INFO (indx, R_CKCORE_TLS_TPOFF32);
+			
+			bfd_put_32 (output_bfd, outrel.r_addend,
+				    htab->elf.sgot->contents + cur_off);
+			if (loc)
+			  bfd_elf32_swap_reloca_out (output_bfd,
+						     &outrel, loc);
+			htab->elf.srelgot->reloc_count++;
+			loc += sizeof (Elf32_External_Rela);
+		      }
+		    else
+		      bfd_put_32 (output_bfd, tpoff (info, relocation),
+				  htab->elf.sgot->contents + cur_off);
+		  }
+		if (h != NULL)
+		  h->got.offset |= 1;
+		else
+		  local_got_offsets[r_symndx] |= 1;
+	      }
+	    if ((tls_type & GOT_TLS_GD) && howto->type != R_CKCORE_TLS_GD32)
+	      off += 8;
+	    relocation
+	      = (htab->elf.sgot->output_section->vma
+		 + htab->elf.sgot->output_offset + off
+		 - (input_section->output_section->vma
+		    + input_section->output_offset
+		    + rel->r_offset));
+	  }
+	default:
+	  /* No substitution when final linking.  */
+	  read_content_substitute = 0;
+	  break;
+	} /* End switch (howto->type).  */
+
+      /* Make sure 32-bit data in the text section will not be affected by
+	 our special endianness.
+	 However, this currently affects noting, since the ADDR32 howto type
+	 does no change with the data read. But We may need this mechanism in
+	 the futrue.  */
+
+      if (howto->size == 2
+	  && (howto->type == R_CKCORE_ADDR32
+	      || howto->type == R_CKCORE_GOT32
+	      || howto->type == R_CKCORE_GOTOFF
+	      || howto->type == R_CKCORE_GOTPC
+	      || howto->type == R_CKCORE_PLT32
+	      || howto->type == R_CKCORE_TLS_LE32
+	      || howto->type == R_CKCORE_TLS_IE32
+	      || howto->type == R_CKCORE_TLS_LDM32
+	      || howto->type == R_CKCORE_TLS_GD32
+	      || howto->type == R_CKCORE_TLS_LDO32
+	      || howto->type == R_CKCORE_RELATIVE))
+	need_reverse_bits = 0;
+      else
+	need_reverse_bits = 1;
+      /* Do the final link.  */
+      if (howto->type != R_CKCORE_PCREL_JSR_IMM11BY2
+	  && howto->type != R_CKCORE_PCREL_JSR_IMM26BY2
+	  && howto->type != R_CKCORE_CALLGRAPH
+	  && do_final_relocate)
+	r = csky_final_link_relocate (howto, input_bfd, input_section,
+				      contents, rel->r_offset,
+				      relocation, addend);
+      
+      if (r != bfd_reloc_ok)
+	{
+	  ret = FALSE;
+	  switch (r)
+	    {
+	    default:
+	      break;
+	    case bfd_reloc_overflow:
+	      if (h != NULL)
+		name = NULL;
+	      else
+		{
+		  name = bfd_elf_string_from_elf_section (input_bfd,
+							  symtab_hdr->sh_link,
+							  sym->st_name);
+		  if (name == NULL)
+		    break;
+		  if (*name == '\0')
+		    name = bfd_section_name (input_bfd, sec);
+		}
+	      (*info->callbacks->reloc_overflow)
+		(info,
+		 (h ? &h->root : NULL),
+		 name, howto->name, (bfd_vma) 0,
+		 input_bfd, input_section, rel->r_offset);
+	      break;
+	    }
+	}
+    } /* End for (;rel < relend; rel++).  */
+  return ret;
+}
+
+static bfd_boolean
+csky_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
+{
+  int offset;
+  size_t size;
+
+  switch (note->descsz)
+    {
+    default:
+      return FALSE;
+      /* Sizeof (struct elf_prstatus) on C-SKY V1 arch.  */
+    case 148:
+      elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
+      elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
+      offset = 72;
+      size = 72;
+      break;
+      /* Sizeof (struct elf_prstatus) on C-SKY V1 arch.  */
+    case 220:
+      elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
+      elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
+      offset = 72;
+      size = 34 * 4;
+      break;
+    }
+  /* Make a ".reg/999" section.  */
+  return _bfd_elfcore_make_pseudosection (abfd, ".reg",
+					  size, note->descpos + offset);
+}
+
+static bfd_boolean
+csky_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
+{
+  switch (note->descsz)
+    {
+    default:
+      return FALSE;
+
+      /* Sizeof (struct elf_prpsinfo) on linux csky.  */
+    case 124:
+      elf_tdata (abfd)->core->program
+	= _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
+      elf_tdata (abfd)->core->command
+	= _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
+    }
+
+  /* Note that for some reason, a spurious space is tacked
+     onto the end of the args in some (at least one anyway)
+     implementations, so strip it off if it exists.  */
+  {
+    char *command = elf_tdata (abfd)->core->command;
+    int n = strlen (command);
+
+    if (0 < n && command[n - 1] == ' ')
+      command[n - 1] = '\0';
+  }
+
+  return TRUE;
+}
+
+/* End of external entry points for sizing and building linker stubs.  */
+
+/* CPU-related basic API.  */
+#define TARGET_BIG_SYM                        csky_elf32_be_vec
+#define TARGET_BIG_NAME                       "elf32-csky-big"
+#define TARGET_LITTLE_SYM                     csky_elf32_le_vec
+#define TARGET_LITTLE_NAME                    "elf32-csky-little"
+#define ELF_ARCH                              bfd_arch_csky
+#define ELF_MACHINE_CODE                      EM_CSKY
+#define ELF_MACHINE_ALT1		      EM_CSKY_OLD
+#define ELF_MAXPAGESIZE                       0x1000
+#define elf_info_to_howto                     csky_elf_info_to_howto
+#define elf_info_to_howto_rel                 NULL
+#define elf_backend_special_sections          csky_elf_special_sections
+#define bfd_elf32_bfd_link_hash_table_create  csky_elf_link_hash_table_create
+
+/* Target related API.  */
+#define bfd_elf32_mkobject                    csky_elf_mkobject
+#define bfd_elf32_bfd_merge_private_bfd_data  csky_elf_merge_private_bfd_data
+#define bfd_elf32_bfd_set_private_flags       csky_elf_set_private_flags
+#define elf_backend_copy_indirect_symbol      csky_elf_copy_indirect_symbol
+
+/* GC section related API.  */
+#define elf_backend_can_gc_sections           1
+#define elf_backend_gc_mark_hook              csky_elf_gc_mark_hook
+#define elf_backend_gc_mark_extra_sections    elf32_csky_gc_mark_extra_sections
+
+/* Relocation related API.  */
+#define elf_backend_reloc_type_class          csky_elf_reloc_type_class
+#define bfd_elf32_bfd_reloc_type_lookup       csky_elf_reloc_type_lookup
+#define bfd_elf32_bfd_reloc_name_lookup       csky_elf_reloc_name_lookup
+#define elf_backend_ignore_discarded_relocs   csky_elf_ignore_discarded_relocs
+#define elf_backend_relocate_section          csky_elf_relocate_section
+#define elf_backend_check_relocs              csky_elf_check_relocs
+
+/* Dynamic relocate related API.  */
+#define elf_backend_create_dynamic_sections   _bfd_elf_create_dynamic_sections
+#define elf_backend_adjust_dynamic_symbol     csky_elf_adjust_dynamic_symbol
+#define elf_backend_size_dynamic_sections     csky_elf_size_dynamic_sections
+#define elf_backend_finish_dynamic_symbol     csky_elf_finish_dynamic_symbol
+#define elf_backend_finish_dynamic_sections   csky_elf_finish_dynamic_sections
+#define elf_backend_rela_normal               1
+#define elf_backend_can_refcount              1
+#define elf_backend_plt_readonly              1
+#define elf_backend_want_got_sym              1
+#define elf_backend_got_header_size           12
+#define elf_backend_want_got_plt              1
+
+/* C-SKY coredump support.  */
+#define elf_backend_grok_prstatus             csky_elf_grok_prstatus
+#define elf_backend_grok_psinfo               csky_elf_grok_psinfo
+
+#include "elf32-target.h"
diff --git a/bfd/libbfd.h b/bfd/libbfd.h
index b810c40..4da58fb 100644
--- a/bfd/libbfd.h
+++ b/bfd/libbfd.h
@@ -3216,6 +3216,71 @@  static const char *const bfd_reloc_code_real_names[] = { "@@uninitialized@@",
   "BFD_RELOC_WASM32_CODE_POINTER",
   "BFD_RELOC_WASM32_INDEX",
   "BFD_RELOC_WASM32_PLT_SIG",
+  "BFD_RELOC_CKCORE_NONE",
+  "BFD_RELOC_CKCORE_ADDR32",
+  "BFD_RELOC_CKCORE_PCREL_IMM8BY4",
+  "BFD_RELOC_CKCORE_PCREL_IMM11BY2",
+  "BFD_RELOC_CKCORE_PCREL_IMM4BY2",
+  "BFD_RELOC_CKCORE_PCREL32",
+  "BFD_RELOC_CKCORE_PCREL_JSR_IMM11BY2",
+  "BFD_RELOC_CKCORE_GNU_VTINHERIT",
+  "BFD_RELOC_CKCORE_GNU_VTENTRY",
+  "BFD_RELOC_CKCORE_RELATIVE",
+  "BFD_RELOC_CKCORE_COPY",
+  "BFD_RELOC_CKCORE_GLOB_DAT",
+  "BFD_RELOC_CKCORE_JUMP_SLOT",
+  "BFD_RELOC_CKCORE_GOTOFF",
+  "BFD_RELOC_CKCORE_GOTPC",
+  "BFD_RELOC_CKCORE_GOT32",
+  "BFD_RELOC_CKCORE_PLT32",
+  "BFD_RELOC_CKCORE_ADDRGOT",
+  "BFD_RELOC_CKCORE_ADDRPLT",
+  "BFD_RELOC_CKCORE_PCREL_IMM26BY2",
+  "BFD_RELOC_CKCORE_PCREL_IMM16BY2",
+  "BFD_RELOC_CKCORE_PCREL_IMM16BY4",
+  "BFD_RELOC_CKCORE_PCREL_IMM10BY2",
+  "BFD_RELOC_CKCORE_PCREL_IMM10BY4",
+  "BFD_RELOC_CKCORE_ADDR_HI16",
+  "BFD_RELOC_CKCORE_ADDR_LO16",
+  "BFD_RELOC_CKCORE_GOTPC_HI16",
+  "BFD_RELOC_CKCORE_GOTPC_LO16",
+  "BFD_RELOC_CKCORE_GOTOFF_HI16",
+  "BFD_RELOC_CKCORE_GOTOFF_LO16",
+  "BFD_RELOC_CKCORE_GOT12",
+  "BFD_RELOC_CKCORE_GOT_HI16",
+  "BFD_RELOC_CKCORE_GOT_LO16",
+  "BFD_RELOC_CKCORE_PLT12",
+  "BFD_RELOC_CKCORE_PLT_HI16",
+  "BFD_RELOC_CKCORE_PLT_LO16",
+  "BFD_RELOC_CKCORE_ADDRGOT_HI16",
+  "BFD_RELOC_CKCORE_ADDRGOT_LO16",
+  "BFD_RELOC_CKCORE_ADDRPLT_HI16",
+  "BFD_RELOC_CKCORE_ADDRPLT_LO16",
+  "BFD_RELOC_CKCORE_PCREL_JSR_IMM26BY2",
+  "BFD_RELOC_CKCORE_TOFFSET_LO16",
+  "BFD_RELOC_CKCORE_DOFFSET_LO16",
+  "BFD_RELOC_CKCORE_PCREL_IMM18BY2",
+  "BFD_RELOC_CKCORE_DOFFSET_IMM18",
+  "BFD_RELOC_CKCORE_DOFFSET_IMM18BY2",
+  "BFD_RELOC_CKCORE_DOFFSET_IMM18BY4",
+  "BFD_RELOC_CKCORE_GOTOFF_IMM18",
+  "BFD_RELOC_CKCORE_GOT_IMM18BY4",
+  "BFD_RELOC_CKCORE_PLT_IMM18BY4",
+  "BFD_RELOC_CKCORE_PCREL_IMM7BY4",
+  "BFD_RELOC_CKCORE_TLS_LE32",
+  "BFD_RELOC_CKCORE_TLS_IE32",
+  "BFD_RELOC_CKCORE_TLS_GD32",
+  "BFD_RELOC_CKCORE_TLS_LDM32",
+  "BFD_RELOC_CKCORE_TLS_LDO32",
+  "BFD_RELOC_CKCORE_TLS_DTPMOD32",
+  "BFD_RELOC_CKCORE_TLS_DTPOFF32",
+  "BFD_RELOC_CKCORE_TLS_TPOFF32",
+  "BFD_RELOC_CKCORE_PCREL_FLRW_IMM8BY4",
+  "BFD_RELOC_CKCORE_NOJSRI",
+  "BFD_RELOC_CKCORE_CALLGRAPH",
+  "BFD_RELOC_CKCORE_IRELATIVE",
+  "BFD_RELOC_CKCORE_PCREL_BLOOP_IMM4BY4",
+  "BFD_RELOC_CKCORE_PCREL_BLOOP_IMM12BY4",
  "@@overflow: BFD_RELOC_UNUSED@@",
 };
 #endif
diff --git a/bfd/reloc.c b/bfd/reloc.c
index 411f998..7613f4e 100644
--- a/bfd/reloc.c
+++ b/bfd/reloc.c
@@ -7984,6 +7984,139 @@  ENUMX
 ENUMDOC
   WebAssembly relocations.
 
+ENUM
+  BFD_RELOC_CKCORE_NONE
+ENUMX
+  BFD_RELOC_CKCORE_ADDR32
+ENUMX
+  BFD_RELOC_CKCORE_PCREL_IMM8BY4
+ENUMX
+  BFD_RELOC_CKCORE_PCREL_IMM11BY2
+ENUMX
+  BFD_RELOC_CKCORE_PCREL_IMM4BY2
+ENUMX
+  BFD_RELOC_CKCORE_PCREL32
+ENUMX
+  BFD_RELOC_CKCORE_PCREL_JSR_IMM11BY2
+ENUMX
+  BFD_RELOC_CKCORE_GNU_VTINHERIT
+ENUMX
+  BFD_RELOC_CKCORE_GNU_VTENTRY
+ENUMX
+  BFD_RELOC_CKCORE_RELATIVE
+ENUMX
+  BFD_RELOC_CKCORE_COPY
+ENUMX
+  BFD_RELOC_CKCORE_GLOB_DAT
+ENUMX
+  BFD_RELOC_CKCORE_JUMP_SLOT
+ENUMX
+  BFD_RELOC_CKCORE_GOTOFF
+ENUMX
+  BFD_RELOC_CKCORE_GOTPC
+ENUMX
+  BFD_RELOC_CKCORE_GOT32
+ENUMX
+  BFD_RELOC_CKCORE_PLT32
+ENUMX
+  BFD_RELOC_CKCORE_ADDRGOT
+ENUMX
+  BFD_RELOC_CKCORE_ADDRPLT
+ENUMX
+  BFD_RELOC_CKCORE_PCREL_IMM26BY2
+ENUMX
+  BFD_RELOC_CKCORE_PCREL_IMM16BY2
+ENUMX
+  BFD_RELOC_CKCORE_PCREL_IMM16BY4
+ENUMX
+  BFD_RELOC_CKCORE_PCREL_IMM10BY2
+ENUMX
+  BFD_RELOC_CKCORE_PCREL_IMM10BY4
+ENUMX
+  BFD_RELOC_CKCORE_ADDR_HI16
+ENUMX
+  BFD_RELOC_CKCORE_ADDR_LO16
+ENUMX
+  BFD_RELOC_CKCORE_GOTPC_HI16
+ENUMX
+  BFD_RELOC_CKCORE_GOTPC_LO16
+ENUMX
+  BFD_RELOC_CKCORE_GOTOFF_HI16
+ENUMX
+  BFD_RELOC_CKCORE_GOTOFF_LO16
+ENUMX
+  BFD_RELOC_CKCORE_GOT12
+ENUMX
+  BFD_RELOC_CKCORE_GOT_HI16
+ENUMX
+  BFD_RELOC_CKCORE_GOT_LO16
+ENUMX
+  BFD_RELOC_CKCORE_PLT12
+ENUMX
+  BFD_RELOC_CKCORE_PLT_HI16
+ENUMX
+  BFD_RELOC_CKCORE_PLT_LO16
+ENUMX
+  BFD_RELOC_CKCORE_ADDRGOT_HI16
+ENUMX
+  BFD_RELOC_CKCORE_ADDRGOT_LO16
+ENUMX
+  BFD_RELOC_CKCORE_ADDRPLT_HI16
+ENUMX
+  BFD_RELOC_CKCORE_ADDRPLT_LO16
+ENUMX
+  BFD_RELOC_CKCORE_PCREL_JSR_IMM26BY2
+ENUMX
+  BFD_RELOC_CKCORE_TOFFSET_LO16
+ENUMX
+  BFD_RELOC_CKCORE_DOFFSET_LO16
+ENUMX
+  BFD_RELOC_CKCORE_PCREL_IMM18BY2
+ENUMX
+  BFD_RELOC_CKCORE_DOFFSET_IMM18
+ENUMX
+  BFD_RELOC_CKCORE_DOFFSET_IMM18BY2
+ENUMX
+  BFD_RELOC_CKCORE_DOFFSET_IMM18BY4
+ENUMX
+  BFD_RELOC_CKCORE_GOTOFF_IMM18
+ENUMX
+  BFD_RELOC_CKCORE_GOT_IMM18BY4
+ENUMX
+  BFD_RELOC_CKCORE_PLT_IMM18BY4
+ENUMX
+  BFD_RELOC_CKCORE_PCREL_IMM7BY4
+ENUMX
+  BFD_RELOC_CKCORE_TLS_LE32
+ENUMX
+  BFD_RELOC_CKCORE_TLS_IE32
+ENUMX
+  BFD_RELOC_CKCORE_TLS_GD32
+ENUMX
+  BFD_RELOC_CKCORE_TLS_LDM32
+ENUMX
+  BFD_RELOC_CKCORE_TLS_LDO32
+ENUMX
+  BFD_RELOC_CKCORE_TLS_DTPMOD32
+ENUMX
+  BFD_RELOC_CKCORE_TLS_DTPOFF32
+ENUMX
+  BFD_RELOC_CKCORE_TLS_TPOFF32
+ENUMX
+  BFD_RELOC_CKCORE_PCREL_FLRW_IMM8BY4
+ENUMX
+  BFD_RELOC_CKCORE_NOJSRI
+ENUMX
+  BFD_RELOC_CKCORE_CALLGRAPH
+ENUMX
+  BFD_RELOC_CKCORE_IRELATIVE
+ENUMX
+  BFD_RELOC_CKCORE_PCREL_BLOOP_IMM4BY4
+ENUMX
+  BFD_RELOC_CKCORE_PCREL_BLOOP_IMM12BY4
+ENUMDOC
+  C-SKY relocations.
+
 ENDSENUM
   BFD_RELOC_UNUSED
 CODE_FRAGMENT
diff --git a/bfd/targets.c b/bfd/targets.c
index 5a2a684..5e097a6 100644
--- a/bfd/targets.c
+++ b/bfd/targets.c
@@ -625,6 +625,8 @@  extern const bfd_target cris_aout_vec;
 extern const bfd_target cris_elf32_vec;
 extern const bfd_target cris_elf32_us_vec;
 extern const bfd_target crx_elf32_vec;
+extern const bfd_target csky_elf32_be_vec;
+extern const bfd_target csky_elf32_le_vec;
 extern const bfd_target d10v_elf32_vec;
 extern const bfd_target d30v_elf32_vec;
 extern const bfd_target dlx_elf32_be_vec;
@@ -955,6 +957,9 @@  static const bfd_target * const _bfd_target_vector[] =
 
 	&crx_elf32_vec,
 
+	&csky_elf32_be_vec,
+	&csky_elf32_le_vec,
+
 	&d10v_elf32_vec,
 	&d30v_elf32_vec,
 
diff --git a/binutils/readelf.c b/binutils/readelf.c
index 8335538..a97980f 100644
--- a/binutils/readelf.c
+++ b/binutils/readelf.c
@@ -98,6 +98,7 @@ 
 #include "elf/cr16.h"
 #include "elf/cris.h"
 #include "elf/crx.h"
+#include "elf/csky.h"
 #include "elf/d10v.h"
 #include "elf/d30v.h"
 #include "elf/dlx.h"
@@ -797,6 +798,7 @@  guess_is_rela (unsigned int e_machine)
     case EM_CR16:
     case EM_CRIS:
     case EM_CRX:
+    case EM_CSKY:
     case EM_D30V:
     case EM_CYGNUS_D30V:
     case EM_FR30:
@@ -1348,6 +1350,10 @@  dump_relocations (Filedata *          filedata,
 	  rtype = elf_frv_reloc_type (type);
 	  break;
 
+	case EM_CSKY:
+	  rtype = elf_csky_reloc_type (type);
+	  break;
+
 	case EM_FT32:
 	  rtype = elf_ft32_reloc_type (type);
 	  break;
@@ -2501,6 +2507,7 @@  get_machine_name (unsigned e_machine)
     case EM_ADAPTEVA_EPIPHANY:	return "Adapteva EPIPHANY";
     case EM_CYGNUS_FRV:		return "Fujitsu FR-V";
     case EM_S12Z:               return "Freescale S12Z";
+    case EM_CSKY:		return "C-SKY";
 
     default:
       snprintf (buff, sizeof (buff), _("<unknown>: 0x%x"), e_machine);
@@ -12278,6 +12285,8 @@  is_32bit_abs_reloc (Filedata * filedata, unsigned int reloc_type)
       return reloc_type == 3; /* R_CR16_NUM32.  */
     case EM_CRX:
       return reloc_type == 15; /* R_CRX_NUM32.  */
+    case EM_CSKY:
+      return reloc_type == 1; /* R_CKCORE_ADDR32.  */
     case EM_CYGNUS_FRV:
       return reloc_type == 1;
     case EM_CYGNUS_D10V:
diff --git a/include/elf/common.h b/include/elf/common.h
index 773f378..88faee7 100644
--- a/include/elf/common.h
+++ b/include/elf/common.h
@@ -340,6 +340,7 @@ 
 #define EM_LANAI	244	/* Lanai 32-bit processor.  */
 #define EM_BPF		247	/* Linux BPF – in-kernel virtual machine.  */
 #define EM_NFP		250	/* Netronome Flow Processor.  */
+#define EM_CSKY		252	/* C-SKY processor family.  */
 
 /* If it is necessary to assign new unofficial EM_* values, please pick large
    random numbers (0x8523, 0xa7f2, etc.) to minimize the chances of collision
@@ -435,6 +436,10 @@ 
 /* Old constant that might be in use by some software. */
 #define EM_OPENRISC		EM_OR1K
 
+/* C-SKY historically used 39, the same value as MCORE, from which the
+   architecture was derived.  */
+#define EM_CSKY_OLD		EM_MCORE
+
 /* See the above comment before you add a new EM_* value here.  */
 
 /* Values for e_version.  */
diff --git a/include/elf/csky.h b/include/elf/csky.h
new file mode 100644
index 0000000..7ffc326
--- /dev/null
+++ b/include/elf/csky.h
@@ -0,0 +1,99 @@ 
+/* C-SKY ELF support for BFD.
+   Copyright (C) 1998-2018 Free Software Foundation, Inc.
+   Contributed by C-SKY Microsystems and Mentor Graphics.
+
+   This file is part of BFD, the Binary File Descriptor library.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+#ifndef _ELF_CSKY_H
+#define _ELF_CSKY_H
+
+#include "elf/reloc-macros.h"
+
+/* Values of relocation types according to the ABI doc.
+   The order should be consistent with csky bfd reloc type
+   table in bfd-in2.h.  */
+START_RELOC_NUMBERS (elf_csky_reloc_type)
+    RELOC_NUMBER (R_CKCORE_NONE,0)
+    RELOC_NUMBER (R_CKCORE_ADDR32,1)
+    RELOC_NUMBER (R_CKCORE_PCREL_IMM8BY4,2)
+    RELOC_NUMBER (R_CKCORE_PCREL_IMM11BY2,3)
+    RELOC_NUMBER (R_CKCORE_PCREL_IMM4BY2,4)
+    RELOC_NUMBER (R_CKCORE_PCREL32,5)
+    RELOC_NUMBER (R_CKCORE_PCREL_JSR_IMM11BY2,6)
+    RELOC_NUMBER (R_CKCORE_GNU_VTINHERIT,7)
+    RELOC_NUMBER (R_CKCORE_GNU_VTENTRY,8)
+    RELOC_NUMBER (R_CKCORE_RELATIVE,9)
+    RELOC_NUMBER (R_CKCORE_COPY,10)
+    RELOC_NUMBER (R_CKCORE_GLOB_DAT,11)
+    RELOC_NUMBER (R_CKCORE_JUMP_SLOT,12)
+    RELOC_NUMBER (R_CKCORE_GOTOFF,13)
+    RELOC_NUMBER (R_CKCORE_GOTPC,14)
+    RELOC_NUMBER (R_CKCORE_GOT32,15)
+    RELOC_NUMBER (R_CKCORE_PLT32,16)
+    RELOC_NUMBER (R_CKCORE_ADDRGOT,17)
+    RELOC_NUMBER (R_CKCORE_ADDRPLT,18)
+    RELOC_NUMBER (R_CKCORE_PCREL_IMM26BY2,19)
+    RELOC_NUMBER (R_CKCORE_PCREL_IMM16BY2,20)
+    RELOC_NUMBER (R_CKCORE_PCREL_IMM16BY4,21)
+    RELOC_NUMBER (R_CKCORE_PCREL_IMM10BY2,22)
+    RELOC_NUMBER (R_CKCORE_PCREL_IMM10BY4,23)
+    RELOC_NUMBER (R_CKCORE_ADDR_HI16,24)
+    RELOC_NUMBER (R_CKCORE_ADDR_LO16,25)
+    RELOC_NUMBER (R_CKCORE_GOTPC_HI16,26)
+    RELOC_NUMBER (R_CKCORE_GOTPC_LO16,27)
+    RELOC_NUMBER (R_CKCORE_GOTOFF_HI16,28)
+    RELOC_NUMBER (R_CKCORE_GOTOFF_LO16,29)
+    RELOC_NUMBER (R_CKCORE_GOT12,30)
+    RELOC_NUMBER (R_CKCORE_GOT_HI16,31)
+    RELOC_NUMBER (R_CKCORE_GOT_LO16,32)
+    RELOC_NUMBER (R_CKCORE_PLT12,33)
+    RELOC_NUMBER (R_CKCORE_PLT_HI16,34)
+    RELOC_NUMBER (R_CKCORE_PLT_LO16,35)
+    RELOC_NUMBER (R_CKCORE_ADDRGOT_HI16,36)
+    RELOC_NUMBER (R_CKCORE_ADDRGOT_LO16,37)
+    RELOC_NUMBER (R_CKCORE_ADDRPLT_HI16,38)
+    RELOC_NUMBER (R_CKCORE_ADDRPLT_LO16,39)
+    RELOC_NUMBER (R_CKCORE_PCREL_JSR_IMM26BY2,40)
+    RELOC_NUMBER (R_CKCORE_TOFFSET_LO16, 41)
+    RELOC_NUMBER (R_CKCORE_DOFFSET_LO16, 42)
+    RELOC_NUMBER (R_CKCORE_PCREL_IMM18BY2, 43)
+    RELOC_NUMBER (R_CKCORE_DOFFSET_IMM18, 44)
+    RELOC_NUMBER (R_CKCORE_DOFFSET_IMM18BY2, 45)
+    RELOC_NUMBER (R_CKCORE_DOFFSET_IMM18BY4, 46)
+    RELOC_NUMBER (R_CKCORE_GOTOFF_IMM18, 47)
+    RELOC_NUMBER (R_CKCORE_GOT_IMM18BY4, 48)
+    RELOC_NUMBER (R_CKCORE_PLT_IMM18BY4, 49)
+    RELOC_NUMBER (R_CKCORE_PCREL_IMM7BY4, 50)
+    RELOC_NUMBER (R_CKCORE_TLS_LE32, 51)
+    RELOC_NUMBER (R_CKCORE_TLS_IE32, 52)
+    RELOC_NUMBER (R_CKCORE_TLS_GD32, 53)
+    RELOC_NUMBER (R_CKCORE_TLS_LDM32, 54)
+    RELOC_NUMBER (R_CKCORE_TLS_LDO32, 55)
+    RELOC_NUMBER (R_CKCORE_TLS_DTPMOD32, 56)
+    RELOC_NUMBER (R_CKCORE_TLS_DTPOFF32, 57)
+    RELOC_NUMBER (R_CKCORE_TLS_TPOFF32, 58)
+    RELOC_NUMBER (R_CKCORE_PCREL_FLRW_IMM8BY4, 59)
+    RELOC_NUMBER (R_CKCORE_NOJSRI, 60)
+    RELOC_NUMBER (R_CKCORE_CALLGRAPH, 61)
+    RELOC_NUMBER (R_CKCORE_IRELATIVE, 62)
+    RELOC_NUMBER (R_CKCORE_PCREL_BLOOP_IMM4BY4, 63)
+    RELOC_NUMBER (R_CKCORE_PCREL_BLOOP_IMM12BY4, 64)
+END_RELOC_NUMBERS (R_CKCORE_MAX)
+
+#endif /* _ELF_CSKY_H  */
+
+