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| author | Glauber Costa <gcosta@redhat.com> | 2008-07-11 20:53:43 +0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-10-13 12:21:29 +0400 |
| commit | 3927fa9e4b5d5f346d12aa0531744daef106ebd3 (patch) | |
| tree | 9696065bbbc8e0a6cd019ecd6be0b3c21884105e /arch | |
| parent | 097a0788df71b0f3328c70ab5f4e41c27ee66817 (diff) | |
| download | linux-3927fa9e4b5d5f346d12aa0531744daef106ebd3.tar.xz | |
x86: use frame pointer information on x86_64 profile_pc
Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/time_64.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/kernel/time_64.c b/arch/x86/kernel/time_64.c index e3d49c553af2..7fd995edb762 100644 --- a/arch/x86/kernel/time_64.c +++ b/arch/x86/kernel/time_64.c @@ -34,11 +34,15 @@ unsigned long profile_pc(struct pt_regs *regs) of flags from PUSHF Eflags always has bits 22 and up cleared unlike kernel addresses. */ if (!user_mode(regs) && in_lock_functions(pc)) { +#ifdef CONFIG_FRAME_POINTER + return *(unsigned long *)(regs->bp + sizeof(long)); +#else unsigned long *sp = (unsigned long *)regs->sp; if (sp[0] >> 22) return sp[0]; if (sp[1] >> 22) return sp[1]; +#endif } return pc; } |