1/* 2 * Mapping of DWARF debug register numbers into register names. 3 * 4 * Copyright (C) 2010 Ian Munsie, IBM Corporation. 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * as published by the Free Software Foundation; either version 9 * 2 of the License, or (at your option) any later version. 10 */ 11 12#include <libio.h> 13#include <dwarf-regs.h> 14 15 16struct pt_regs_dwarfnum { 17 const char *name; 18 unsigned int dwarfnum; 19}; 20 21#define STR(s) #s 22#define REG_DWARFNUM_NAME(r, num) {.name = r, .dwarfnum = num} 23#define GPR_DWARFNUM_NAME(num) \ 24 {.name = STR(%gpr##num), .dwarfnum = num} 25#define REG_DWARFNUM_END {.name = NULL, .dwarfnum = 0} 26 27/* 28 * Reference: 29 * http://refspecs.linuxfoundation.org/ELF/ppc64/PPC-elf64abi-1.9.html 30 */ 31static const struct pt_regs_dwarfnum regdwarfnum_table[] = { 32 GPR_DWARFNUM_NAME(0), 33 GPR_DWARFNUM_NAME(1), 34 GPR_DWARFNUM_NAME(2), 35 GPR_DWARFNUM_NAME(3), 36 GPR_DWARFNUM_NAME(4), 37 GPR_DWARFNUM_NAME(5), 38 GPR_DWARFNUM_NAME(6), 39 GPR_DWARFNUM_NAME(7), 40 GPR_DWARFNUM_NAME(8), 41 GPR_DWARFNUM_NAME(9), 42 GPR_DWARFNUM_NAME(10), 43 GPR_DWARFNUM_NAME(11), 44 GPR_DWARFNUM_NAME(12), 45 GPR_DWARFNUM_NAME(13), 46 GPR_DWARFNUM_NAME(14), 47 GPR_DWARFNUM_NAME(15), 48 GPR_DWARFNUM_NAME(16), 49 GPR_DWARFNUM_NAME(17), 50 GPR_DWARFNUM_NAME(18), 51 GPR_DWARFNUM_NAME(19), 52 GPR_DWARFNUM_NAME(20), 53 GPR_DWARFNUM_NAME(21), 54 GPR_DWARFNUM_NAME(22), 55 GPR_DWARFNUM_NAME(23), 56 GPR_DWARFNUM_NAME(24), 57 GPR_DWARFNUM_NAME(25), 58 GPR_DWARFNUM_NAME(26), 59 GPR_DWARFNUM_NAME(27), 60 GPR_DWARFNUM_NAME(28), 61 GPR_DWARFNUM_NAME(29), 62 GPR_DWARFNUM_NAME(30), 63 GPR_DWARFNUM_NAME(31), 64 REG_DWARFNUM_NAME("%msr", 66), 65 REG_DWARFNUM_NAME("%ctr", 109), 66 REG_DWARFNUM_NAME("%link", 108), 67 REG_DWARFNUM_NAME("%xer", 101), 68 REG_DWARFNUM_NAME("%dar", 119), 69 REG_DWARFNUM_NAME("%dsisr", 118), 70 REG_DWARFNUM_END, 71}; 72 73/** 74 * get_arch_regstr() - lookup register name from it's DWARF register number 75 * @n: the DWARF register number 76 * 77 * get_arch_regstr() returns the name of the register in struct 78 * regdwarfnum_table from it's DWARF register number. If the register is not 79 * found in the table, this returns NULL; 80 */ 81const char *get_arch_regstr(unsigned int n) 82{ 83 const struct pt_regs_dwarfnum *roff; 84 for (roff = regdwarfnum_table; roff->name != NULL; roff++) 85 if (roff->dwarfnum == n) 86 return roff->name; 87 return NULL; 88} 89