x86 vDSO: canonicalize sysenter .eh_frame

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Some assembler versions automagically optimize .eh_frame contents,
changing their size.  The CFI in sysenter.S was not using optimal
formatting, so it would be changed by newer/smarter assemblers.
This ran afoul of the wired constant for padding out the other vDSO
images to match its size.  This changes the original hand-coded
source to use the optimal format encoding for its operations.  That
leaves nothing more for a fancy assembler to do, so the sizes will
match the wired-in expected size regardless of the assembler version.

Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

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Roland McGrath 2008-01-30 13:30:44 +01:00 • committed by Ingo Molnar

parent 16e48e7e79

commit cadd516422

3 changed files with 8 additions and 14 deletions

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2

arch/x86/vdso/vdso32/int80.S

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2

arch/x86/vdso/vdso32/syscall.S

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18

arch/x86/vdso/vdso32/sysenter.S

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