| From | Kamal Mostafa <> | Subject | [PATCH 062/105] perf: arm64: Record the user-mode PC in the call chain. | Date | Fri, 28 Jun 2013 11:51:24 -0700 |
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3.8.13.4 -stable review patch. If anyone has any objections, please let me know.
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From: Jed Davis <jld@mozilla.com>
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> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> [ kamal: backport to 3.8 (context) ] Signed-off-by: Kamal Mostafa <kamal@canonical.com> --- arch/arm64/kernel/perf_event.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/arch/arm64/kernel/perf_event.c b/arch/arm64/kernel/perf_event.c index f7073c7..0256b68 100644 --- a/arch/arm64/kernel/perf_event.c +++ b/arch/arm64/kernel/perf_event.c @@ -1331,6 +1331,7 @@ void perf_callchain_user(struct perf_callchain_entry *entry, { struct frame_tail __user *tail; + perf_callchain_store(entry, regs->pc); tail = (struct frame_tail __user *)regs->regs[29]; while (entry->nr < PERF_MAX_STACK_DEPTH && -- 1.8.1.2
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