Fix MIPS32 frame-pointer forcing for more recent GCC.

git-mirror · Jun 14, 2012 · e525bc9 · e525bc9
1 parent 7fe70b0
commit e525bc9
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Showing 2 changed files with 9 additions and 2 deletions.
diff --git a/ChangeLog.mips b/ChangeLog.mips
@@ -1,3 +1,9 @@
+2012-06-14  Joseph Myers  <joseph@codesourcery.com>
+
+	* sysdeps/unix/sysv/linux/mips/mips32/sysdep.h
+	(FORCE_FRAME_POINTER): Assign result of alloca to a volatile
+	variable.
+
 2012-06-01  Joseph Myers  <joseph@codesourcery.com>
 
 	* sysdeps/mips/mips64/n32/s_fma.c: New file.

diff --git a/sysdeps/unix/sysv/linux/mips/mips32/sysdep.h b/sysdeps/unix/sysv/linux/mips/mips32/sysdep.h
@@ -194,8 +194,9 @@
 /* We need to use a frame pointer for the functions in which we
    adjust $sp around the syscall, or debug information and unwind
    information will be $sp relative and thus wrong during the syscall.  As
-   of GCC 3.4.3, this is sufficient.  */
-#define FORCE_FRAME_POINTER alloca (4)
+   of GCC 4.7, this is sufficient.  */
+#define FORCE_FRAME_POINTER						\
+  void *volatile __fp_force __attribute__ ((unused)) = alloca (4)
 
 #define internal_syscall5(ncs_init, cs_init, input, err, arg1, arg2, arg3, arg4, arg5)\
 ({									\