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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 | /* * Mapping of DWARF debug register numbers into register names. * * Copyright (C) 2010 Ian Munsie, IBM Corporation. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #include <stddef.h> #include <errno.h> #include <string.h> #include <dwarf-regs.h> #include <linux/ptrace.h> #include <linux/kernel.h> #include <linux/stringify.h> #include "util.h" struct pt_regs_dwarfnum { const char *name; unsigned int dwarfnum; unsigned int ptregs_offset; }; #define REG_DWARFNUM_NAME(r, num) \ {.name = __stringify(%)__stringify(r), .dwarfnum = num, \ .ptregs_offset = offsetof(struct pt_regs, r)} #define GPR_DWARFNUM_NAME(num) \ {.name = __stringify(%gpr##num), .dwarfnum = num, \ .ptregs_offset = offsetof(struct pt_regs, gpr[num])} #define REG_DWARFNUM_END {.name = NULL, .dwarfnum = 0, .ptregs_offset = 0} /* * Reference: * http://refspecs.linuxfoundation.org/ELF/ppc64/PPC-elf64abi-1.9.html */ static const struct pt_regs_dwarfnum regdwarfnum_table[] = { GPR_DWARFNUM_NAME(0), GPR_DWARFNUM_NAME(1), GPR_DWARFNUM_NAME(2), GPR_DWARFNUM_NAME(3), GPR_DWARFNUM_NAME(4), GPR_DWARFNUM_NAME(5), GPR_DWARFNUM_NAME(6), GPR_DWARFNUM_NAME(7), GPR_DWARFNUM_NAME(8), GPR_DWARFNUM_NAME(9), GPR_DWARFNUM_NAME(10), GPR_DWARFNUM_NAME(11), GPR_DWARFNUM_NAME(12), GPR_DWARFNUM_NAME(13), GPR_DWARFNUM_NAME(14), GPR_DWARFNUM_NAME(15), GPR_DWARFNUM_NAME(16), GPR_DWARFNUM_NAME(17), GPR_DWARFNUM_NAME(18), GPR_DWARFNUM_NAME(19), GPR_DWARFNUM_NAME(20), GPR_DWARFNUM_NAME(21), GPR_DWARFNUM_NAME(22), GPR_DWARFNUM_NAME(23), GPR_DWARFNUM_NAME(24), GPR_DWARFNUM_NAME(25), GPR_DWARFNUM_NAME(26), GPR_DWARFNUM_NAME(27), GPR_DWARFNUM_NAME(28), GPR_DWARFNUM_NAME(29), GPR_DWARFNUM_NAME(30), GPR_DWARFNUM_NAME(31), REG_DWARFNUM_NAME(msr, 66), REG_DWARFNUM_NAME(ctr, 109), REG_DWARFNUM_NAME(link, 108), REG_DWARFNUM_NAME(xer, 101), REG_DWARFNUM_NAME(dar, 119), REG_DWARFNUM_NAME(dsisr, 118), REG_DWARFNUM_END, }; /** * get_arch_regstr() - lookup register name from it's DWARF register number * @n: the DWARF register number * * get_arch_regstr() returns the name of the register in struct * regdwarfnum_table from it's DWARF register number. If the register is not * found in the table, this returns NULL; */ const char *get_arch_regstr(unsigned int n) { const struct pt_regs_dwarfnum *roff; for (roff = regdwarfnum_table; roff->name != NULL; roff++) if (roff->dwarfnum == n) return roff->name; return NULL; } int regs_query_register_offset(const char *name) { const struct pt_regs_dwarfnum *roff; for (roff = regdwarfnum_table; roff->name != NULL; roff++) if (!strcmp(roff->name, name)) return roff->ptregs_offset; return -EINVAL; } |