1 /* 2 * Mapping of DWARF debug register numbers into register names. 3 * 4 * Copyright (C) 2010 Will Deacon, ARM Ltd. 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10 11 #include <stddef.h> 12 #include <dwarf-regs.h> 13 14 struct pt_regs_dwarfnum { 15 const char *name; 16 unsigned int dwarfnum; 17 }; 18 19 #define STR(s) #s 20 #define REG_DWARFNUM_NAME(r, num) {.name = r, .dwarfnum = num} 21 #define GPR_DWARFNUM_NAME(num) \ 22 {.name = STR(%x##num), .dwarfnum = num} 23 #define REG_DWARFNUM_END {.name = NULL, .dwarfnum = 0} 24 25 /* 26 * Reference: 27 * http://infocenter.arm.com/help/topic/com.arm.doc.ihi0057b/IHI0057B_aadwarf64.pdf 28 */ 29 static const struct pt_regs_dwarfnum regdwarfnum_table[] = { 30 GPR_DWARFNUM_NAME(0), 31 GPR_DWARFNUM_NAME(1), 32 GPR_DWARFNUM_NAME(2), 33 GPR_DWARFNUM_NAME(3), 34 GPR_DWARFNUM_NAME(4), 35 GPR_DWARFNUM_NAME(5), 36 GPR_DWARFNUM_NAME(6), 37 GPR_DWARFNUM_NAME(7), 38 GPR_DWARFNUM_NAME(8), 39 GPR_DWARFNUM_NAME(9), 40 GPR_DWARFNUM_NAME(10), 41 GPR_DWARFNUM_NAME(11), 42 GPR_DWARFNUM_NAME(12), 43 GPR_DWARFNUM_NAME(13), 44 GPR_DWARFNUM_NAME(14), 45 GPR_DWARFNUM_NAME(15), 46 GPR_DWARFNUM_NAME(16), 47 GPR_DWARFNUM_NAME(17), 48 GPR_DWARFNUM_NAME(18), 49 GPR_DWARFNUM_NAME(19), 50 GPR_DWARFNUM_NAME(20), 51 GPR_DWARFNUM_NAME(21), 52 GPR_DWARFNUM_NAME(22), 53 GPR_DWARFNUM_NAME(23), 54 GPR_DWARFNUM_NAME(24), 55 GPR_DWARFNUM_NAME(25), 56 GPR_DWARFNUM_NAME(26), 57 GPR_DWARFNUM_NAME(27), 58 GPR_DWARFNUM_NAME(28), 59 GPR_DWARFNUM_NAME(29), 60 REG_DWARFNUM_NAME("%lr", 30), 61 REG_DWARFNUM_NAME("%sp", 31), 62 REG_DWARFNUM_END, 63 }; 64 65 /** 66 * get_arch_regstr() - lookup register name from it's DWARF register number 67 * @n: the DWARF register number 68 * 69 * get_arch_regstr() returns the name of the register in struct 70 * regdwarfnum_table from it's DWARF register number. If the register is not 71 * found in the table, this returns NULL; 72 */ 73 const char *get_arch_regstr(unsigned int n) 74 { 75 const struct pt_regs_dwarfnum *roff; 76 for (roff = regdwarfnum_table; roff->name != NULL; roff++) 77 if (roff->dwarfnum == n) 78 return roff->name; 79 return NULL; 80 } 81
