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authorNamhyung Kim <namhyung@kernel.org>2023-12-13 03:13:08 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2023-12-23 16:56:05 +0300
commit3eee606757ad82f32332a2da174aa032bfd9cc32 (patch)
tree3ad104f8344efc65a88c8e2debc06d14fc0ad849 /tools/perf/arch
parent60cb19b485a534a896431393a877d853bbe51b67 (diff)
downloadlinux-3eee606757ad82f32332a2da174aa032bfd9cc32.tar.xz
perf dwarf-regs: Add get_dwarf_regnum()
The get_dwarf_regnum() returns a DWARF register number from a register name string according to the psABI. Also add two pseudo encodings of DWARF_REG_PC which is a register that are used by PC-relative addressing and DWARF_REG_FB which is a frame base register. They need to be handled in a special way. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: linux-toolchains@vger.kernel.org Cc: linux-trace-devel@vger.kernel.org Link: https://lore.kernel.org/r/20231213001323.718046-3-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/arch')
-rw-r--r--tools/perf/arch/x86/util/dwarf-regs.c38
1 files changed, 38 insertions, 0 deletions
diff --git a/tools/perf/arch/x86/util/dwarf-regs.c b/tools/perf/arch/x86/util/dwarf-regs.c
index 530934805710..399c4a0a29d8 100644
--- a/tools/perf/arch/x86/util/dwarf-regs.c
+++ b/tools/perf/arch/x86/util/dwarf-regs.c
@@ -113,3 +113,41 @@ int regs_query_register_offset(const char *name)
return roff->offset;
return -EINVAL;
}
+
+struct dwarf_regs_idx {
+ const char *name;
+ int idx;
+};
+
+static const struct dwarf_regs_idx x86_regidx_table[] = {
+ { "rax", 0 }, { "eax", 0 }, { "ax", 0 }, { "al", 0 },
+ { "rdx", 1 }, { "edx", 1 }, { "dx", 1 }, { "dl", 1 },
+ { "rcx", 2 }, { "ecx", 2 }, { "cx", 2 }, { "cl", 2 },
+ { "rbx", 3 }, { "edx", 3 }, { "bx", 3 }, { "bl", 3 },
+ { "rsi", 4 }, { "esi", 4 }, { "si", 4 }, { "sil", 4 },
+ { "rdi", 5 }, { "edi", 5 }, { "di", 5 }, { "dil", 5 },
+ { "rbp", 6 }, { "ebp", 6 }, { "bp", 6 }, { "bpl", 6 },
+ { "rsp", 7 }, { "esp", 7 }, { "sp", 7 }, { "spl", 7 },
+ { "r8", 8 }, { "r8d", 8 }, { "r8w", 8 }, { "r8b", 8 },
+ { "r9", 9 }, { "r9d", 9 }, { "r9w", 9 }, { "r9b", 9 },
+ { "r10", 10 }, { "r10d", 10 }, { "r10w", 10 }, { "r10b", 10 },
+ { "r11", 11 }, { "r11d", 11 }, { "r11w", 11 }, { "r11b", 11 },
+ { "r12", 12 }, { "r12d", 12 }, { "r12w", 12 }, { "r12b", 12 },
+ { "r13", 13 }, { "r13d", 13 }, { "r13w", 13 }, { "r13b", 13 },
+ { "r14", 14 }, { "r14d", 14 }, { "r14w", 14 }, { "r14b", 14 },
+ { "r15", 15 }, { "r15d", 15 }, { "r15w", 15 }, { "r15b", 15 },
+ { "rip", DWARF_REG_PC },
+};
+
+int get_arch_regnum(const char *name)
+{
+ unsigned int i;
+
+ if (*name != '%')
+ return -EINVAL;
+
+ for (i = 0; i < ARRAY_SIZE(x86_regidx_table); i++)
+ if (!strcmp(x86_regidx_table[i].name, name + 1))
+ return x86_regidx_table[i].idx;
+ return -ENOENT;
+}