| Will Deacon | eb668c6 | 2010-06-25 12:24:54 +0100 | [diff] [blame^] | 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 <libio.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(%r##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.ihi0040a/IHI0040A_aadwarf.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 | REG_DWARFNUM_NAME("%fp", 11), |
| 42 | REG_DWARFNUM_NAME("%ip", 12), |
| 43 | REG_DWARFNUM_NAME("%sp", 13), |
| 44 | REG_DWARFNUM_NAME("%lr", 14), |
| 45 | REG_DWARFNUM_NAME("%pc", 15), |
| 46 | REG_DWARFNUM_END, |
| 47 | }; |
| 48 | |
| 49 | /** |
| 50 | * get_arch_regstr() - lookup register name from it's DWARF register number |
| 51 | * @n: the DWARF register number |
| 52 | * |
| 53 | * get_arch_regstr() returns the name of the register in struct |
| 54 | * regdwarfnum_table from it's DWARF register number. If the register is not |
| 55 | * found in the table, this returns NULL; |
| 56 | */ |
| 57 | const char *get_arch_regstr(unsigned int n) |
| 58 | { |
| 59 | const struct pt_regs_dwarfnum *roff; |
| 60 | for (roff = regdwarfnum_table; roff->name != NULL; roff++) |
| 61 | if (roff->dwarfnum == n) |
| 62 | return roff->name; |
| 63 | return NULL; |
| 64 | } |