3eee606757
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>
42 lines
1.1 KiB
C
42 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _PERF_DWARF_REGS_H_
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#define _PERF_DWARF_REGS_H_
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#define DWARF_REG_PC 0xd3af9c /* random number */
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#define DWARF_REG_FB 0xd3affb /* random number */
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#ifdef HAVE_DWARF_SUPPORT
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const char *get_arch_regstr(unsigned int n);
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/*
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* get_dwarf_regstr - Returns ftrace register string from DWARF regnum
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* n: DWARF register number
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* machine: ELF machine signature (EM_*)
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*/
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const char *get_dwarf_regstr(unsigned int n, unsigned int machine);
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int get_arch_regnum(const char *name);
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/*
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* get_dwarf_regnum - Returns DWARF regnum from register name
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* name: architecture register name
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* machine: ELF machine signature (EM_*)
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*/
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int get_dwarf_regnum(const char *name, unsigned int machine);
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#else /* HAVE_DWARF_SUPPORT */
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static inline int get_dwarf_regnum(const char *name __maybe_unused,
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unsigned int machine __maybe_unused)
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{
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return -1;
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}
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#endif
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#ifdef HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET
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/*
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* Arch should support fetching the offset of a register in pt_regs
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* by its name. See kernel's regs_query_register_offset in
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* arch/xxx/kernel/ptrace.c.
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*/
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int regs_query_register_offset(const char *name);
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#endif
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#endif
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