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author | Leo Yan <leo.yan@linaro.org> | 2020-12-25 08:27:50 +0300 |
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committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2020-12-28 15:53:28 +0300 |
commit | f19b5872d889bb91f5e204c0674e5c0dd1d5895e (patch) | |
tree | a141ae9f363f3d08520ec7d3cb1f5c95ac62c3df /tools/perf/arch/arm64 | |
parent | 5c8fe583cce542aa0b84adc939ce85293de36e5e (diff) | |
download | linux-f19b5872d889bb91f5e204c0674e5c0dd1d5895e.tar.xz |
perf probe: Fixup Arm64 SDT arguments
Arm64 ELF section '.note.stapsdt' uses string format "-4@[sp, NUM]" if
the probe is to access data in stack, e.g. below is an example for
dumping Arm64 ELF file and shows the argument format:
Arguments: -4@[sp, 12] -4@[sp, 8] -4@[sp, 4]
Comparing against other archs' argument format, Arm64's argument
introduces an extra space character in the middle of square brackets,
due to argv_split() uses space as splitter, the argument is wrongly
divided into two items.
To support Arm64 SDT, this patch fixes up for this case, if any item
contains sub string "[sp", concatenates the two continuous items. And
adds the detailed explaination in comment.
Signed-off-by: Leo Yan <leo.yan@linaro.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexandre Truong <alexandre.truong@arm.com>
Cc: Alexis Berlemont <alexis.berlemont@gmail.com>
Cc: He Zhe <zhe.he@windriver.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sumanth Korikkar <sumanthk@linux.ibm.com>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Cc: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lore.kernel.org/lkml/20201225052751.24513-3-leo.yan@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/arch/arm64')
0 files changed, 0 insertions, 0 deletions