Hi,
X32 uses 0x40000206 for system call number __NR_rt_sigreturn and long
long is needed for 64bit integer. OK for trunk?
Thanks.
H.J.
---
2011-08-02 H.J. Lu <hongjiu...@intel.com>
* config/i386/linux-unwind.h (RT_SIGRETURN_SYSCALL): New.
(x86_64_fallback_frame_state): Use RT_SIGRETURN_SYSCALL and
long long to check rt_sigreturn syscall.
diff --git a/libgcc/config/i386/linux-unwind.h
b/libgcc/config/i386/linux-unwind.h
index de44823..f17a46c 100644
--- a/libgcc/config/i386/linux-unwind.h
+++ b/libgcc/config/i386/linux-unwind.h
@@ -44,9 +44,14 @@ x86_64_fallback_frame_state (struct _Unwind_Context *context,
struct sigcontext *sc;
long new_cfa;
- /* movq __NR_rt_sigreturn, %rax ; syscall */
+ /* movq $__NR_rt_sigreturn, %rax ; syscall. */
+#ifdef __LP64__
+#define RT_SIGRETURN_SYSCALL 0x050f0000000fc0c7ULL
+#else
+#define RT_SIGRETURN_SYSCALL 0x050f40002006c0c7ULL
+#endif
if (*(unsigned char *)(pc+0) == 0x48
- && *(unsigned long *)(pc+1) == 0x050f0000000fc0c7)
+ && *(unsigned long long *)(pc+1) == RT_SIGRETURN_SYSCALL)
{
struct ucontext *uc_ = context->cfa;
/* The void * cast is necessary to avoid an aliasing warning.
