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Subject[PATCH 1/4] ptrace: Add variant of profile_pc for passing in pc
Date
From: Andi Kleen <ak@linux.intel.com>

Add a variant of profile_pc() that allows passing in the
instruction pointer.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
arch/x86/include/asm/ptrace.h | 1 +
arch/x86/kernel/time.c | 9 ++++++---
2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/arch/x86/include/asm/ptrace.h b/arch/x86/include/asm/ptrace.h
index 3566454..0fafaac 100644
--- a/arch/x86/include/asm/ptrace.h
+++ b/arch/x86/include/asm/ptrace.h
@@ -139,6 +139,7 @@ struct cpuinfo_x86;
struct task_struct;

extern unsigned long profile_pc(struct pt_regs *regs);
+extern unsigned long __profile_pc(unsigned long pc, struct pt_regs *regs);
#define profile_pc profile_pc

extern unsigned long
diff --git a/arch/x86/kernel/time.c b/arch/x86/kernel/time.c
index 5a64d05..cd98120 100644
--- a/arch/x86/kernel/time.c
+++ b/arch/x86/kernel/time.c
@@ -26,10 +26,8 @@
DEFINE_VVAR(volatile unsigned long, jiffies) = INITIAL_JIFFIES;
#endif

-unsigned long profile_pc(struct pt_regs *regs)
+unsigned long __profile_pc(unsigned long pc, struct pt_regs *regs)
{
- unsigned long pc = instruction_pointer(regs);
-
if (!user_mode_vm(regs) && in_lock_functions(pc)) {
#ifdef CONFIG_FRAME_POINTER
return *(unsigned long *)(regs->bp + sizeof(long));
@@ -49,6 +47,11 @@ unsigned long profile_pc(struct pt_regs *regs)
}
return pc;
}
+
+unsigned long profile_pc(struct pt_regs *regs)
+{
+ return __profile_pc(instruction_pointer(regs), regs);
+}
EXPORT_SYMBOL(profile_pc);

/*
--
1.7.4.4


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