[v7,01/17] sysdeps/init_array: Add PREINIT_FUNCTION to crti.S

Message ID 20180127035744.10058-2-palmer@dabbelt.com
State New
Headers show
Series
  • [v7,01/17] sysdeps/init_array: Add PREINIT_FUNCTION to crti.S
Related show

Commit Message

Palmer Dabbelt Jan. 27, 2018, 3:57 a.m.
The RISC-V port contains a crti.S that simply contains a link to
PREINIT_FUNCTION (when defined).  As this should be entirely generic,
Joseph Myers suggested that we update the generic init_array version to
contain this.  Since RISC-V is the only user of init_array this won't
break any existing ports.

2018-01-26  Palmer Dabbelt  <palmer@sifive.com>

        * sysdeps/init_array/crti.S (.section .init_array): Add
        PREINIT_FUNCTION when defined.
---
 sysdeps/init_array/crti.S | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

-- 
2.13.6

Patch

diff --git a/sysdeps/init_array/crti.S b/sysdeps/init_array/crti.S
index 0a6e9fd95338..145c918f939b 100644
--- a/sysdeps/init_array/crti.S
+++ b/sysdeps/init_array/crti.S
@@ -11,3 +11,17 @@ 
    But new configurations without compatibility concerns for
    toolchains without .init_array support can use this to avoid the
    superfluous .init and .fini boilerplate code.  */
+
+#ifdef PREINIT_FUNCTION
+
+#if PREINIT_FUNCTION_WEAK
+# error PREINIT_FUNCTION_WEAK is unsupported
+#endif
+
+/* This arranges for PREINIT_FUNCTION to be called upon loading a library that
+   contains crti.o.  */
+
+	.section .init_array,"a",%init_array
+	.dc.a PREINIT_FUNCTION
+
+#endif