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authorRandolph Chung <tausq@parisc-linux.org>2005-10-21 22:42:18 -0400
committerKyle McMartin <kyle@parisc-linux.org>2005-10-21 22:42:18 -0400
commit5cd55b0edee7f979530c86b23728d461ddeb9f3f (patch)
treea279495f59c8de8bbfdd1bbdfd0b0927160fa669 /arch/parisc
parent951a0150135c46c7791d68e0d1112900d99302d7 (diff)
downloadop-kernel-dev-5cd55b0edee7f979530c86b23728d461ddeb9f3f.zip
op-kernel-dev-5cd55b0edee7f979530c86b23728d461ddeb9f3f.tar.gz
[PARISC] Take into account nullified insn and lock functions for profiling
export profile_pc() symbol - oprofile needs it when built as a module. Signed-off-by: Grant Grundler <grundler@parisc-linux.org> Take into account nullified insn and lock functions for profiling This is needed at the end of functions; it is typical that the return branch nullifies the next insn, which is in the next function. This causes profiling data to show up against the "wrong" function. We also count lock times against the locker. This is consistent with other architectures. Signed-off-by: Randolph Chung <tausq@parisc-linux.org> Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
Diffstat (limited to 'arch/parisc')
-rw-r--r--arch/parisc/kernel/time.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/parisc/kernel/time.c b/arch/parisc/kernel/time.c
index 7ff67f8..163cdf3 100644
--- a/arch/parisc/kernel/time.c
+++ b/arch/parisc/kernel/time.c
@@ -104,6 +104,24 @@ irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
return IRQ_HANDLED;
}
+
+unsigned long profile_pc(struct pt_regs *regs)
+{
+ unsigned long pc = instruction_pointer(regs);
+
+ if (regs->gr[0] & PSW_N)
+ pc -= 4;
+
+#ifdef CONFIG_SMP
+ if (in_lock_functions(pc))
+ pc = regs->gr[2];
+#endif
+
+ return pc;
+}
+EXPORT_SYMBOL(profile_pc);
+
+
/*** converted from ia64 ***/
/*
* Return the number of micro-seconds that elapsed since the last
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