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 <stdlib.h> 12 #ifndef __UCLIBC__ 13 #include <libio.h> 14 #endif 15 #include <dwarf-regs.h> 16 17 struct pt_regs_dwarfnum { 18 const char *name; 19 unsigned int dwarfnum; 20 }; 21 22 #define STR(s) #s 23 #define REG_DWARFNUM_NAME(r, num) {.name = r, .dwarfnum = num} 24 #define GPR_DWARFNUM_NAME(num) \ 25 {.name = STR(%r##num), .dwarfnum = num} 26 #define REG_DWARFNUM_END {.name = NULL, .dwarfnum = 0} 27 28 /* 29 * Reference: 30 * http://infocenter.arm.com/help/topic/com.arm.doc.ihi0040a/IHI0040A_aadwarf.pdf 31 */ 32 static const struct pt_regs_dwarfnum regdwarfnum_table[] = { 33 GPR_DWARFNUM_NAME(0), 34 GPR_DWARFNUM_NAME(1), 35 GPR_DWARFNUM_NAME(2), 36 GPR_DWARFNUM_NAME(3), 37 GPR_DWARFNUM_NAME(4), 38 GPR_DWARFNUM_NAME(5), 39 GPR_DWARFNUM_NAME(6), 40 GPR_DWARFNUM_NAME(7), 41 GPR_DWARFNUM_NAME(8), 42 GPR_DWARFNUM_NAME(9), 43 GPR_DWARFNUM_NAME(10), 44 REG_DWARFNUM_NAME("%fp", 11), 45 REG_DWARFNUM_NAME("%ip", 12), 46 REG_DWARFNUM_NAME("%sp", 13), 47 REG_DWARFNUM_NAME("%lr", 14), 48 REG_DWARFNUM_NAME("%pc", 15), 49 REG_DWARFNUM_END, 50 }; 51 52 /** 53 * get_arch_regstr() - lookup register name from it's DWARF register number 54 * @n: the DWARF register number 55 * 56 * get_arch_regstr() returns the name of the register in struct 57 * regdwarfnum_table from it's DWARF register number. If the register is not 58 * found in the table, this returns NULL; 59 */ 60 const char *get_arch_regstr(unsigned int n) 61 { 62 const struct pt_regs_dwarfnum *roff; 63 for (roff = regdwarfnum_table; roff->name != NULL; roff++) 64 if (roff->dwarfnum == n) 65 return roff->name; 66 return NULL; 67 } 68