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[PATCH] x86_64: reliable stack trace support (x86-64 syscall 

Adjust the CFA offset for 64- and 32-bit syscall entries so that the five
slots pre-subtracted from the stack pointer do not appear to reside outside
of the current frame.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Jan Beulich 2006-06-26 13:57:38 +02:00 committed by Linus Torvalds
parent 1de9c3f67e
commit dffead4e42
2 changed files with 2 additions and 2 deletions
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2
arch/x86_64/ia32/ia32entry.S
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@ -179,7 +179,7 @@ ENDPROC(ia32_sysenter_target)
*/
ENTRY(ia32_cstar_target)
CFI_STARTPROC32 simple
CFI_DEF_CFA rsp,0
CFI_DEF_CFA rsp,PDA_STACKOFFSET
CFI_REGISTER rip,rcx
/*CFI_REGISTER rflags,r11*/
swapgs

2
arch/x86_64/kernel/entry.S
View File

@ -189,7 +189,7 @@ END(ret_from_fork)
ENTRY(system_call)
CFI_STARTPROC simple
CFI_DEF_CFA rsp,0
CFI_DEF_CFA rsp,PDA_STACKOFFSET
CFI_REGISTER rip,rcx
/*CFI_REGISTER rflags,r11*/
swapgs