tools/perf/arch/x86/util/dwarf-regs.c

   1 /*
   2  * dwarf-regs.c : Mapping of DWARF debug register numbers into register names.
   3  * Extracted from probe-finder.c
   4  *
   5  * Written by Masami Hiramatsu <mhiramat@redhat.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  20  *
  21  */
  22
  23 #include <stddef.h>
  24 #include <dwarf-regs.h>
  25
  26 /*
  27  * Generic dwarf analysis helpers
  28  */
  29
  30 #define X86_32_MAX_REGS 8
  31 const char *x86_32_regs_table[X86_32_MAX_REGS] = {
  32         "%ax",
  33         "%cx",
  34         "%dx",
  35         "%bx",
  36         "$stack",       /* Stack address instead of %sp */
  37         "%bp",
  38         "%si",
  39         "%di",
  40 };
  41
  42 #define X86_64_MAX_REGS 16
  43 const char *x86_64_regs_table[X86_64_MAX_REGS] = {
  44         "%ax",
  45         "%dx",
  46         "%cx",
  47         "%bx",
  48         "%si",
  49         "%di",
  50         "%bp",
  51         "%sp",
  52         "%r8",
  53         "%r9",
  54         "%r10",
  55         "%r11",
  56         "%r12",
  57         "%r13",
  58         "%r14",
  59         "%r15",
  60 };
  61
  62 /* TODO: switching by dwarf address size */
  63 #ifdef __x86_64__
  64 #define ARCH_MAX_REGS X86_64_MAX_REGS
  65 #define arch_regs_table x86_64_regs_table
  66 #else
  67 #define ARCH_MAX_REGS X86_32_MAX_REGS
  68 #define arch_regs_table x86_32_regs_table
  69 #endif
  70
  71 /* Return architecture dependent register string (for kprobe-tracer) */
  72 const char *get_arch_regstr(unsigned int n)
  73 {
  74         return (n < ARCH_MAX_REGS) ? arch_regs_table[n] : NULL;
  75 }