[PATCH v4 0/2] arm & arm64: perf: Fix callchain parse error with kernel tracepoint events
houpengyang at huawei.com
Thu May 7 22:43:02 PDT 2015
For arm & arm64, when tracing with tracepoint events, the IP and cpsr
are set to 0, preventing the perf code parsing the callchain and
resolving the symbols correctly.
These two patches fix this by implementing perf_arch_fetch_caller_regs
for arm and arm64, which fills several necessary register info for
callchain unwinding and symbol resolving.
- fix compile errors
- split the original patch into two, one for arm and the other arm64;
- change '|=' to '=' when setting cpsr.
Hou Pengyang (2):
arm: perf: Fix callchain parse error with kernel tracepoint events
arm64: perf: Fix callchain parse error with kernel tracepoint events
arch/arm/include/asm/perf_event.h | 7 +++++++
arch/arm64/include/asm/perf_event.h | 7 +++++++
2 files changed, 14 insertions(+)
More information about the linux-arm-kernel