diff options
Diffstat (limited to 'features/perf/perf-perf-can-not-parser-the-backtrace-of-app-in-the.patch')
| -rw-r--r-- | features/perf/perf-perf-can-not-parser-the-backtrace-of-app-in-the.patch | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/features/perf/perf-perf-can-not-parser-the-backtrace-of-app-in-the.patch b/features/perf/perf-perf-can-not-parser-the-backtrace-of-app-in-the.patch new file mode 100644 index 00000000..91ab18c5 --- /dev/null +++ b/features/perf/perf-perf-can-not-parser-the-backtrace-of-app-in-the.patch @@ -0,0 +1,33 @@ +From 4b69a5a32098d3abcd0800f6d24fa29451a82c3a Mon Sep 17 00:00:00 2001 +From: Jiping Ma <jiping.ma2@windriver.com> +Date: Thu, 30 Apr 2020 09:35:06 +0800 +Subject: [PATCH] perf: perf can not parser the backtrace of app in the 32bit + system and 64bit kernel. + +Record PC value from regs[15], it should be regs[32], which cause perf +parser the backtrace failed. + +Signed-off-by: Jiping Ma <jiping.ma2@windriver.com> +Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com> +--- + arch/arm64/kernel/perf_regs.c | 4 ++++ + 1 file changed, 4 insertions(+) + +diff --git a/arch/arm64/kernel/perf_regs.c b/arch/arm64/kernel/perf_regs.c +index 0bbac612146e..04088e6b6092 100644 +--- a/arch/arm64/kernel/perf_regs.c ++++ b/arch/arm64/kernel/perf_regs.c +@@ -32,6 +32,10 @@ u64 perf_reg_value(struct pt_regs *regs, int idx) + if ((u32)idx == PERF_REG_ARM64_PC) + return regs->pc; + ++ if (perf_reg_abi(current) == PERF_SAMPLE_REGS_ABI_32 ++ && idx == 15) ++ return regs->regs[PERF_REG_ARM64_PC]; ++ + return regs->regs[idx]; + } + +-- +2.19.1 + |