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| author | Masami Hiramatsu <mhiramat@kernel.org> | 2016-08-25 19:24:57 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-09-01 18:41:09 +0300 |
| commit | 293d5b43948309434568f4dcbb36cce4c3c51bd5 (patch) | |
| tree | 447e6c1434553309ce9e727ef07ea30197321783 /tools/perf/util/include | |
| parent | 428aff82e92a29da0e4276623180f9a98f2d5b16 (diff) | |
| download | linux-293d5b43948309434568f4dcbb36cce4c3c51bd5.tar.xz | |
perf probe: Support probing on offline cross-arch binary
Support probing on offline cross-architecture binary by adding getting
the target machine arch from ELF and choose correct register string for
the machine.
Here is an example:
-----
$ perf probe --vmlinux=./vmlinux-arm --definition 'do_sys_open $params'
p:probe/do_sys_open do_sys_open+0 dfd=%r5:s32 filename=%r1:u32 flags=%r6:s32 mode=%r3:u16
-----
Here, we can get probe/do_sys_open from above and append it to to the target
machine's tracing/kprobe_events file in the tracefs mountput, usually
/sys/kernel/debug/tracing/kprobe_events (or /sys/kernel/tracing/kprobe_events).
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/147214229717.23638.6440579792548044658.stgit@devbox
[ Add definition for EM_AARCH64 to fix the build on at least centos 6, debian 7 & ubuntu 12.04.5 ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/include')
| -rw-r--r-- | tools/perf/util/include/dwarf-regs.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/tools/perf/util/include/dwarf-regs.h b/tools/perf/util/include/dwarf-regs.h index 07c644ed64c4..43bfd8da7919 100644 --- a/tools/perf/util/include/dwarf-regs.h +++ b/tools/perf/util/include/dwarf-regs.h @@ -3,6 +3,12 @@ #ifdef HAVE_DWARF_SUPPORT const char *get_arch_regstr(unsigned int n); +/* + * get_dwarf_regstr - Returns ftrace register string from DWARF regnum + * n: DWARF register number + * machine: ELF machine signature (EM_*) + */ +const char *get_dwarf_regstr(unsigned int n, unsigned int machine); #endif #ifdef HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET |