tools/perf/util/dwarf-regs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * dwarf-regs.c : Mapping of DWARF debug register numbers into register names.
   4  *
   5  * Written by: Masami Hiramatsu <mhiramat@kernel.org>
   6  */
   7
   8 #include <util.h>
   9 #include <debug.h>
  10 #include <dwarf-regs.h>
  11 #include <elf.h>
  12 #include <linux/kernel.h>
  13
  14 #ifndef EM_AARCH64
  15 #define EM_AARCH64      183  /* ARM 64 bit */
  16 #endif
  17
  18 /* Define const char * {arch}_register_tbl[] */
  19 #define DEFINE_DWARF_REGSTR_TABLE
  20 #include "../arch/x86/include/dwarf-regs-table.h"
  21 #include "../arch/arm/include/dwarf-regs-table.h"
  22 #include "../arch/arm64/include/dwarf-regs-table.h"
  23 #include "../arch/sh/include/dwarf-regs-table.h"
  24 #include "../arch/powerpc/include/dwarf-regs-table.h"
  25 #include "../arch/s390/include/dwarf-regs-table.h"
  26 #include "../arch/sparc/include/dwarf-regs-table.h"
  27 #include "../arch/xtensa/include/dwarf-regs-table.h"
  28
  29 #define __get_dwarf_regstr(tbl, n) (((n) < ARRAY_SIZE(tbl)) ? (tbl)[(n)] : NULL)
  30
  31 /* Return architecture dependent register string (for kprobe-tracer) */
  32 const char *get_dwarf_regstr(unsigned int n, unsigned int machine)
  33 {
  34         switch (machine) {
  35         case EM_NONE:   /* Generic arch - use host arch */
  36                 return get_arch_regstr(n);
  37         case EM_386:
  38                 return __get_dwarf_regstr(x86_32_regstr_tbl, n);
  39         case EM_X86_64:
  40                 return __get_dwarf_regstr(x86_64_regstr_tbl, n);
  41         case EM_ARM:
  42                 return __get_dwarf_regstr(arm_regstr_tbl, n);
  43         case EM_AARCH64:
  44                 return __get_dwarf_regstr(aarch64_regstr_tbl, n);
  45         case EM_SH:
  46                 return __get_dwarf_regstr(sh_regstr_tbl, n);
  47         case EM_S390:
  48                 return __get_dwarf_regstr(s390_regstr_tbl, n);
  49         case EM_PPC:
  50         case EM_PPC64:
  51                 return __get_dwarf_regstr(powerpc_regstr_tbl, n);
  52         case EM_SPARC:
  53         case EM_SPARCV9:
  54                 return __get_dwarf_regstr(sparc_regstr_tbl, n);
  55         case EM_XTENSA:
  56                 return __get_dwarf_regstr(xtensa_regstr_tbl, n);
  57         default:
  58                 pr_err("ELF MACHINE %x is not supported.\n", machine);
  59         }
  60         return NULL;
  61 }