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 <stdlib.h> 13 #ifndef __UCLIBC__ 14 #include <libio.h> 15 #endif 16 #include <dwarf-regs.h> 17 18 19 struct pt_regs_dwarfnum { 20 const char *name; 21 unsigned int dwarfnum; 22 }; 23 24 #define STR(s) #s 25 #define REG_DWARFNUM_NAME(r, num) {.name = r, .dwarfnum = num} 26 #define GPR_DWARFNUM_NAME(num) \ 27 {.name = STR(%gpr##num), .dwarfnum = num} 28 #define REG_DWARFNUM_END {.name = NULL, .dwarfnum = 0} 29 30 /* 31 * Reference: 32 * http://refspecs.linuxfoundation.org/ELF/ppc64/PPC-elf64abi-1.9.html 33 */ 34 static const struct pt_regs_dwarfnum regdwarfnum_table[] = { 35 GPR_DWARFNUM_NAME(0), 36 GPR_DWARFNUM_NAME(1), 37 GPR_DWARFNUM_NAME(2), 38 GPR_DWARFNUM_NAME(3), 39 GPR_DWARFNUM_NAME(4), 40 GPR_DWARFNUM_NAME(5), 41 GPR_DWARFNUM_NAME(6), 42 GPR_DWARFNUM_NAME(7), 43 GPR_DWARFNUM_NAME(8), 44 GPR_DWARFNUM_NAME(9), 45 GPR_DWARFNUM_NAME(10), 46 GPR_DWARFNUM_NAME(11), 47 GPR_DWARFNUM_NAME(12), 48 GPR_DWARFNUM_NAME(13), 49 GPR_DWARFNUM_NAME(14), 50 GPR_DWARFNUM_NAME(15), 51 GPR_DWARFNUM_NAME(16), 52 GPR_DWARFNUM_NAME(17), 53 GPR_DWARFNUM_NAME(18), 54 GPR_DWARFNUM_NAME(19), 55 GPR_DWARFNUM_NAME(20), 56 GPR_DWARFNUM_NAME(21), 57 GPR_DWARFNUM_NAME(22), 58 GPR_DWARFNUM_NAME(23), 59 GPR_DWARFNUM_NAME(24), 60 GPR_DWARFNUM_NAME(25), 61 GPR_DWARFNUM_NAME(26), 62 GPR_DWARFNUM_NAME(27), 63 GPR_DWARFNUM_NAME(28), 64 GPR_DWARFNUM_NAME(29), 65 GPR_DWARFNUM_NAME(30), 66 GPR_DWARFNUM_NAME(31), 67 REG_DWARFNUM_NAME("%msr", 66), 68 REG_DWARFNUM_NAME("%ctr", 109), 69 REG_DWARFNUM_NAME("%link", 108), 70 REG_DWARFNUM_NAME("%xer", 101), 71 REG_DWARFNUM_NAME("%dar", 119), 72 REG_DWARFNUM_NAME("%dsisr", 118), 73 REG_DWARFNUM_END, 74 }; 75 76 /** 77 * get_arch_regstr() - lookup register name from it's DWARF register number 78 * @n: the DWARF register number 79 * 80 * get_arch_regstr() returns the name of the register in struct 81 * regdwarfnum_table from it's DWARF register number. If the register is not 82 * found in the table, this returns NULL; 83 */ 84 const char *get_arch_regstr(unsigned int n) 85 { 86 const struct pt_regs_dwarfnum *roff; 87 for (roff = regdwarfnum_table; roff->name != NULL; roff++) 88 if (roff->dwarfnum == n) 89 return roff->name; 90 return NULL; 91 } 92