diff options
| author | Ian Rogers <irogers@google.com> | 2026-01-16 21:28:38 -0800 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2026-01-20 15:43:56 -0300 |
| commit | d3ab52c31efab9e8a29b8fc1ae4c09ab41e0cf84 (patch) | |
| tree | 962a3b3486e07165e463c5c7359d559f1228a48a /tools/perf/util/include | |
| parent | c31040085914f1188720073baa43d1483693c0a3 (diff) | |
perf dwarf-regs: Add get_dwarf_regnum_for_perf_regnum() and use for x86 unwinding
Add a utility to map a perf register number to a DWARF register number
for a particular ELF machine type.
Create a generic unwind-libdw initial register initialization routine
that uses this function and thereby avoids arch specific
initialization. The unwind-libdw code does:
1) compute the maximum DWARF register from the set of sampled user registers,
2) allocates a set of DWARF registers,
3) copies the sample registers into the appropriate DWARF registers.
This generic solution is initially implemented for use with x86 as
only get_dwarf_regnum_for_perf_regnum() support for x86 is currently present.
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Aditya Bodkhe <aditya.b1@linux.ibm.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Alexandre Ghiti <alex@ghiti.fr>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.ibm.com>
Cc: Chun-Tse Shao <ctshao@google.com>
Cc: Dmitriy Vyukov <dvyukov@google.com>
Cc: Dr. David Alan Gilbert <linux@treblig.org>
Cc: Guo Ren <guoren@kernel.org>
Cc: Haibo Xu <haibo1.xu@intel.com>
Cc: Howard Chu <howardchu95@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Krzysztof Łopatowski <krzysztof.m.lopatowski@gmail.com>
Cc: Leo Yan <leo.yan@linux.dev>
Cc: Mark Wielaard <mark@klomp.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Paul Walmsley <pjw@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sergei Trofimovich <slyich@gmail.com>
Cc: Shimin Guo <shimin.guo@skydio.com>
Cc: Stephen Brennan <stephen.s.brennan@oracle.com>
Cc: Thomas Falcon <thomas.falcon@intel.com>
Cc: Will Deacon <will@kernel.org>
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 | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/tools/perf/util/include/dwarf-regs.h b/tools/perf/util/include/dwarf-regs.h index bb5413b0fee4..00881f1d45d6 100644 --- a/tools/perf/util/include/dwarf-regs.h +++ b/tools/perf/util/include/dwarf-regs.h @@ -101,6 +101,8 @@ const char *get_dwarf_regstr(unsigned int n, unsigned int machine, unsigned int int __get_dwarf_regnum_i386(const char *name); int __get_dwarf_regnum_x86_64(const char *name); +int __get_dwarf_regnum_for_perf_regnum_i386(int perf_regnum); +int __get_dwarf_regnum_for_perf_regnum_x86_64(int perf_regnum); /* * get_dwarf_regnum - Returns DWARF regnum from register name @@ -109,6 +111,12 @@ int __get_dwarf_regnum_x86_64(const char *name); */ int get_dwarf_regnum(const char *name, unsigned int machine, unsigned int flags); +/* + * get_dwarf_regnum - Returns DWARF regnum from perf register number. + */ +int get_dwarf_regnum_for_perf_regnum(int perf_regnum, unsigned int machine, unsigned int flags, + bool only_libdw_supported); + void get_powerpc_regs(u32 raw_insn, int is_source, struct annotated_op_loc *op_loc); #else /* HAVE_LIBDW_SUPPORT */ |