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 <libio.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 } 76