From: Kai Tietz <ktietz70@googlemail.com>
To: xunxun <xunxun1982@gmail.com>
Cc: Bob Breuer <breuerr@mc.net>, "gcc@gcc.gnu.org" <gcc@gcc.gnu.org>,
Richard Henderson <rth@twiddle.net>,
qemu-devel <qemu-devel@nongnu.org>,
Mark Cave-Ayland <mark.cave-ayland@siriusit.co.uk>
Subject: Re: gcc auto-omit-frame-pointer vs msvc longjmp
Date: Thu, 20 Oct 2011 17:12:00 -0000 [thread overview]
Message-ID: <CAEwic4Zey2f6fzSOAiGtyxuBnN2zSPwQCcDdTDdL8-DOiqC2GQ@mail.gmail.com> (raw)
In-Reply-To: <CAEwic4ZJfwJBUgA2=Vwh3GBzCfqkTavYvXrZO7aicy=snVkQzg@mail.gmail.com>
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. */
next prev parent reply other threads:[~2011-10-20 15:34 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <4E9BB180.6080506@mc.net>
[not found] ` <4E9C0497.2000605@siriusit.co.uk>
[not found] ` <4E9C3703.3040109@mc.net>
2011-10-17 21:20 ` Richard Henderson
2011-10-17 21:32 ` [Qemu-devel] " Blue Swirl
2011-10-17 22:23 ` Richard Henderson
2011-10-17 22:56 ` Bob Breuer
2011-10-18 2:06 ` Kai Tietz
2011-10-18 4:20 ` Bob Breuer
2011-10-18 4:22 ` Kai Tietz
2011-10-20 3:26 ` Bob Breuer
2011-10-20 4:18 ` Richard Henderson
2011-10-20 6:08 ` xunxun
2011-10-20 15:01 ` Kai Tietz
2011-10-20 17:12 ` Kai Tietz [this message]
2011-10-21 22:47 ` jojelino
2011-10-22 12:30 ` xunxun
2011-10-22 13:18 ` xunxun
2011-10-22 14:21 ` Kai Tietz
2011-10-22 22:59 ` asmwarrior
2011-10-24 20:05 ` [Qemu-devel] " Bob Breuer
2011-10-24 23:25 ` Kai Tietz
2011-10-25 17:00 ` Bob Breuer
2011-10-20 14:16 ` jojelino
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