diff options
| author | Jed Davis <jld@mozilla.com> | 2013-06-19 23:07:14 -0400 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2013-06-20 05:16:39 -0400 |
| commit | abc41254181e901ef5eda2c884ca6cd88a186b6d (patch) | |
| tree | ad5dbd9c1adf10bafd4b172c75e5014c863b6df2 | |
| parent | 7d132055814ef17a6c7b69f342244c410a5e000f (diff) | |
perf: arm64: Record the user-mode PC in the call chain.
With this change, we no longer lose the innermost entry in the user-mode
part of the call chain. See also the x86 port, which includes the ip,
and the corresponding change in arch/arm.
Signed-off-by: Jed Davis <jld@mozilla.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Cc: stable@vger.kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
| -rw-r--r-- | arch/arm64/kernel/perf_event.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/kernel/perf_event.c b/arch/arm64/kernel/perf_event.c index 1e49e5eb81e9..9ba33c40cdf8 100644 --- a/arch/arm64/kernel/perf_event.c +++ b/arch/arm64/kernel/perf_event.c | |||
| @@ -1336,6 +1336,7 @@ void perf_callchain_user(struct perf_callchain_entry *entry, | |||
| 1336 | return; | 1336 | return; |
| 1337 | } | 1337 | } |
| 1338 | 1338 | ||
| 1339 | perf_callchain_store(entry, regs->pc); | ||
| 1339 | tail = (struct frame_tail __user *)regs->regs[29]; | 1340 | tail = (struct frame_tail __user *)regs->regs[29]; |
| 1340 | 1341 | ||
| 1341 | while (entry->nr < PERF_MAX_STACK_DEPTH && | 1342 | while (entry->nr < PERF_MAX_STACK_DEPTH && |