From: Mark Kettenis <mark.kettenis@xs4all.nl>
To: libffi-discuss@sourceware.org
Subject: [PATCH] Fix stack alignment on *BSD/i386
Date: Mon, 01 Apr 2013 11:18:00 -0000 [thread overview]
Message-ID: <201304011118.r31BI5OV023760@glazunov.sibelius.xs4all.nl> (raw)
The same thing was done to the "generic" SystemV ABI code back in
2010. Without this, executing code that uses SSE instructions with
data on the stack will fail.
2013-04-01 Mark Kettenis <kettenis@gnu.org>
* src/x86/freebsd.S (ffi_call_SYSV): Align the stack pointer to
16-bytes.
Index: src/x86/freebsd.S
===================================================================
--- src/x86/freebsd.S (revision 197303)
+++ src/x86/freebsd.S (working copy)
@@ -49,6 +49,9 @@
movl 16(%ebp),%ecx
subl %ecx,%esp
+ /* Align the stack pointer to 16-bytes */
+ andl $0xfffffff0, %esp
+
movl %esp,%eax
/* Place all of the ffi_prep_args in position */
next reply other threads:[~2013-04-01 11:18 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-01 11:18 Mark Kettenis [this message]
2013-11-04 23:47 ` Brad Smith
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