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authorJan Beulich <JBeulich@novell.com>2010-09-02 12:52:45 (GMT)
committerIngo Molnar <mingo@elte.hu>2010-09-03 06:14:09 (GMT)
commite6b04b6b5a3182ae36cf9a69f1aaaee432edc8ad (patch)
treea1f160e3b7e39b53641948cdd6423e8a22ff50be /arch/x86/kernel/entry_64.S
parent2bfc96a127bc1cc94d26bfaa40159966064f9c8c (diff)
downloadlinux-e6b04b6b5a3182ae36cf9a69f1aaaee432edc8ad.tar.xz
x86-64: Fix unwind annotations in syscall stubs
With the return address removed from the stack, these should really refer to their caller's register state. Signed-off-by: Jan Beulich <jbeulich@novell.com> Acked-by: Alexander van Heukelum <heukelum@fastmail.fm> LKML-Reference: <4C7FBA3D0200007800013F61@vpn.id2.novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/entry_64.S')
-rw-r--r--arch/x86/kernel/entry_64.S9
1 files changed, 4 insertions, 5 deletions
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index 17be5ec..16aeff0 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -714,9 +714,8 @@ END(ptregscall_common)
ENTRY(stub_execve)
CFI_STARTPROC
- popq %r11
- CFI_ADJUST_CFA_OFFSET -8
- CFI_REGISTER rip, r11
+ addq $8, %rsp
+ PARTIAL_FRAME 0
SAVE_REST
FIXUP_TOP_OF_STACK %r11
movq %rsp, %rcx
@@ -735,7 +734,7 @@ END(stub_execve)
ENTRY(stub_rt_sigreturn)
CFI_STARTPROC
addq $8, %rsp
- CFI_ADJUST_CFA_OFFSET -8
+ PARTIAL_FRAME 0
SAVE_REST
movq %rsp,%rdi
FIXUP_TOP_OF_STACK %r11
@@ -1445,7 +1444,6 @@ error_swapgs:
error_sti:
TRACE_IRQS_OFF
ret
- CFI_ENDPROC
/*
* There are two places in the kernel that can potentially fault with
@@ -1470,6 +1468,7 @@ bstep_iret:
/* Fix truncated RIP */
movq %rcx,RIP+8(%rsp)
jmp error_swapgs
+ CFI_ENDPROC
END(error_entry)