[12/17,PowerPC] Add tests for TAR

Message ID 20180713135226.2321-13-pedromfc@linux.ibm.com
State New
Headers show
Series
  • GDB support for more powerpc registers on linux
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Commit Message

Pedro Franco de Carvalho July 13, 2018, 1:52 p.m.
This patch adds a testcase for GDB access to the Target Address
Register.

gdb/testsuite/ChangeLog:
YYYY-MM-DD  Pedro Franco de Carvalho  <pedromfc@linux.ibm.com>

	* gdb.arch/powerpc-tar.c: New file.
	* gdb.arch/powerpc-tar.exp: New file.
---
 gdb/testsuite/gdb.arch/powerpc-tar.c   |  33 ++++++++++
 gdb/testsuite/gdb.arch/powerpc-tar.exp | 115 +++++++++++++++++++++++++++++++++
 2 files changed, 148 insertions(+)
 create mode 100644 gdb/testsuite/gdb.arch/powerpc-tar.c
 create mode 100644 gdb/testsuite/gdb.arch/powerpc-tar.exp

-- 
2.13.6

Patch

diff --git a/gdb/testsuite/gdb.arch/powerpc-tar.c b/gdb/testsuite/gdb.arch/powerpc-tar.c
new file mode 100644
index 0000000000..8e545b2ba3
--- /dev/null
+++ b/gdb/testsuite/gdb.arch/powerpc-tar.c
@@ -0,0 +1,33 @@ 
+/* This test is part of GDB, the GNU debugger.
+
+   Copyright 2018 Free Software Foundation, Inc.
+
+   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, see <http://www.gnu.org/licenses/>.  */
+
+int main (void)
+{
+  void * target1 = &&target1_l;
+  void * target2 = &&target2_l;
+  asm volatile ("mtspr 815,%0" : : "r" (target1) : );
+
+  /* Branch always to TAR.  */
+  asm volatile ("bctar 20,0,0"); // marker
+
+ target2_l:
+  asm volatile ("nop"); // marker 2
+ target1_l:
+  asm volatile ("nop");
+
+  return 0;
+}
diff --git a/gdb/testsuite/gdb.arch/powerpc-tar.exp b/gdb/testsuite/gdb.arch/powerpc-tar.exp
new file mode 100644
index 0000000000..f3c77a960e
--- /dev/null
+++ b/gdb/testsuite/gdb.arch/powerpc-tar.exp
@@ -0,0 +1,115 @@ 
+# Copyright 2018 Free Software Foundation, Inc.
+
+# 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, see <http://www.gnu.org/licenses/>.
+
+# This file is part of the gdb testsuite.
+
+# Test access to special purpose register TAR.
+
+if {![istarget "powerpc*-*-linux*"]} then {
+    verbose "Skipping PowerPC test for the TAR register."
+    return
+}
+
+standard_testfile .c
+
+if {[build_executable "compile" $binfile $srcfile {debug}] == -1} {
+    return -1
+}
+
+proc check_register_access { regname } {
+    global gdb_prompt
+
+    set test "$regname register access"
+    gdb_test_multiple "info reg $regname" "$test" {
+	-re "Invalid register.*\r\n$gdb_prompt $" {
+	    unsupported "$test"
+	    return 0
+	}
+	-re "\r\n$regname.*\r\n$gdb_prompt $" {
+	    pass "$test"
+	    return 1
+	}
+    }
+    return 0
+}
+
+clean_restart $binfile
+
+runto_main
+
+if {![check_register_access "tar"]} {
+    return
+}
+
+# Do one pass to check if TAR is usable, system
+# software can prevent it from being used.
+proc tar_available {} {
+    global gdb_prompt
+    global inferior_exited_re
+
+    set test "TAR available to inferior"
+    gdb_test_multiple "continue" "" {
+	-re "Illegal instruction.*\r\n$gdb_prompt $" {
+	    unsupported "$test"
+	    return 0
+	}
+	-re "$inferior_exited_re normally.*$gdb_prompt $" {
+	    pass "$test"
+	    return 1
+	}
+    }
+    return 0
+}
+
+if {![tar_available]} {
+    return
+}
+
+# Now do the actual test
+clean_restart $binfile
+
+runto_main
+
+set bp_line [gdb_get_line_number "marker"]
+
+gdb_breakpoint ${srcfile}:${bp_line}
+
+gdb_continue_to_breakpoint "continue to marker"
+
+set target1 [get_hexadecimal_valueof "target1" -1]
+set tar [get_hexadecimal_valueof "\$tar" -2]
+
+set test "TAR value from mtspr"
+
+if {${target1} == ${tar}} {
+    pass $test
+} else {
+    fail $test
+}
+
+set target2 [get_hexadecimal_valueof "target2" -1]
+
+if {$target2 == -1} {
+    fail "Could not get value of label2"
+    return
+}
+
+gdb_test_no_output "set \$tar = $target2"
+
+set bp_line [gdb_get_line_number "marker 2"]
+
+gdb_breakpoint ${srcfile}:${bp_line}
+
+gdb_continue_to_breakpoint "continue to new target address" ".*marker 2.*"