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Re: [Qemu-devel] gcc auto-omit-frame-pointer vs msvc longjmp
From: |
Kai Tietz |
Subject: |
Re: [Qemu-devel] gcc auto-omit-frame-pointer vs msvc longjmp |
Date: |
Thu, 20 Oct 2011 17:34:16 +0200 |
Hi,
For trunk-version I have a tentative patch for this issue. On 4.6.x
and older branches this doesn't work, as here we can't differenciate
that easy between ms- and sysv-abi.
But could somebody give this patch a try?
Regards,
Kai
ChangeLog
* config/i386/i386.c (ix86_frame_pointer_required): Enforce use of
frame-pointer for 32-bit ms-abi, if setjmp is used.
Index: i386.c
===================================================================
--- i386.c (revision 180099)
+++ i386.c (working copy)
@@ -8391,6 +8391,10 @@
if (SUBTARGET_FRAME_POINTER_REQUIRED)
return true;
+ /* For older 32-bit runtimes setjmp requires valid frame-pointer. */
+ if (TARGET_32BIT_MS_ABI && cfun->calls_setjmp)
+ return true;
+
/* In ix86_option_override_internal, TARGET_OMIT_LEAF_FRAME_POINTER
turns off the frame pointer by default. Turn it back on now if
we've not got a leaf function. */
- Re: [Qemu-devel] gcc auto-omit-frame-pointer vs msvc longjmp, (continued)
- Re: [Qemu-devel] gcc auto-omit-frame-pointer vs msvc longjmp, Bob Breuer, 2011/10/17
- Re: [Qemu-devel] gcc auto-omit-frame-pointer vs msvc longjmp, Kai Tietz, 2011/10/17
- Re: [Qemu-devel] gcc auto-omit-frame-pointer vs msvc longjmp, Bob Breuer, 2011/10/17
- Re: [Qemu-devel] gcc auto-omit-frame-pointer vs msvc longjmp, Kai Tietz, 2011/10/17
- Re: [Qemu-devel] gcc auto-omit-frame-pointer vs msvc longjmp, Bob Breuer, 2011/10/19
- Re: [Qemu-devel] gcc auto-omit-frame-pointer vs msvc longjmp, Richard Henderson, 2011/10/19
- Re: [Qemu-devel] gcc auto-omit-frame-pointer vs msvc longjmp, xunxun, 2011/10/20
- Re: [Qemu-devel] gcc auto-omit-frame-pointer vs msvc longjmp, Kai Tietz, 2011/10/20
- Re: [Qemu-devel] gcc auto-omit-frame-pointer vs msvc longjmp,
Kai Tietz <=
- Message not available
- Re: [Qemu-devel] gcc auto-omit-frame-pointer vs msvc longjmp, xunxun, 2011/10/22
- Re: [Qemu-devel] gcc auto-omit-frame-pointer vs msvc longjmp, xunxun, 2011/10/22
- Re: [Qemu-devel] gcc auto-omit-frame-pointer vs msvc longjmp, Kai Tietz, 2011/10/22
- Re: [Qemu-devel] gcc auto-omit-frame-pointer vs msvc longjmp, asmwarrior, 2011/10/22
- Re: [Qemu-devel] gcc auto-omit-frame-pointer vs msvc longjmp, Bob Breuer, 2011/10/24
- Re: [Qemu-devel] gcc auto-omit-frame-pointer vs msvc longjmp, Kai Tietz, 2011/10/24
- Re: [Qemu-devel] gcc auto-omit-frame-pointer vs msvc longjmp, Bob Breuer, 2011/10/25
- Re: [Qemu-devel] gcc auto-omit-frame-pointer vs msvc longjmp, jojelino, 2011/10/20