From: Andi Kleen <andi@firstfloor.org>
To: a.p.zijlstra@chello.nl
Cc: acme@ghostprotocols.net, linux-kernel@vger.kernel.org,
Andi Kleen <ak@linux.intel.com>
Subject: [PATCH 1/4] ptrace: Add variant of profile_pc for passing in pc
Date: Thu, 15 Sep 2011 15:56:49 -0700 [thread overview]
Message-ID: <1316127412-1912-1-git-send-email-andi@firstfloor.org> (raw)
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
next reply other threads:[~2011-09-15 22:57 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-15 22:56 Andi Kleen [this message]
2011-09-15 22:56 ` [PATCH 2/4] perf_events: Pass the event to perf_instruction_pointer Andi Kleen
2011-09-15 23:16 ` Thomas Gleixner
2011-09-15 22:56 ` [PATCH 3/4] perf_events: Support a lock_parent event flag Andi Kleen
2011-09-20 9:16 ` Peter Zijlstra
2011-09-20 17:51 ` Andi Kleen
2011-09-15 22:56 ` [PATCH 4/4] perf tools: Add -l flag to top/record to account to parent Andi Kleen
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