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[PATCH] x86_64: Pass -32 to the assembler when compiling the 32bit vsyscall pages

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This quietens warnings and actually fixes a bug.  The unwind tables would
come out wrong without -32, causing pthread cancellation during them to
crash in the gcc runtime.

The problem seems to only happen with newer binutils (it doesn't happen
with 2.16.91.0.2 but happens wit 2.16.91.0.5)

Thanks to David Altobelli <david.altobelli@hp.com> and Brian Baker
<Brian.B@hp.com> for test case and initial analysis.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Andi Kleen 2006-04-22 02:35:57 -07:00 committed by Linus Torvalds
parent 304dbdb7a4
commit ddbe3eec59
1 changed files with 2 additions and 2 deletions
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4
arch/x86_64/ia32/Makefile
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@ -27,5 +27,5 @@ $(obj)/vsyscall-sysenter.so $(obj)/vsyscall-syscall.so: \
$(obj)/vsyscall-%.so: $(src)/vsyscall.lds $(obj)/vsyscall-%.o FORCE
$(call if_changed,syscall)
AFLAGS_vsyscall-sysenter.o = -m32
AFLAGS_vsyscall-syscall.o = -m32
AFLAGS_vsyscall-sysenter.o = -m32 -Wa,-32
AFLAGS_vsyscall-syscall.o = -m32 -Wa,-32