From dffead4e421e289c8434351400d24fd35723e874 Mon Sep 17 00:00:00 2001 From: Jan Beulich Date: Mon, 26 Jun 2006 13:57:38 +0200 Subject: [PATCH] [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 Signed-off-by: Andi Kleen Signed-off-by: Linus Torvalds --- arch/x86_64/ia32/ia32entry.S | 2 +- arch/x86_64/kernel/entry.S | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86_64/ia32/ia32entry.S b/arch/x86_64/ia32/ia32entry.S index d073ca34d4f5..222777b26142 100644 --- a/arch/x86_64/ia32/ia32entry.S +++ b/arch/x86_64/ia32/ia32entry.S @@ -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 diff --git a/arch/x86_64/kernel/entry.S b/arch/x86_64/kernel/entry.S index 4f407ef6b865..7290e72b9a34 100644 --- a/arch/x86_64/kernel/entry.S +++ b/arch/x86_64/kernel/entry.S @@ -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 -- 2.30.2