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100 lines
2.6 KiB
100 lines
2.6 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Mapping of DWARF debug register numbers into register names. |
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* |
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* Copyright (C) 2010 Ian Munsie, IBM Corporation. |
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*/ |
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#include <stddef.h> |
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#include <errno.h> |
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#include <string.h> |
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#include <dwarf-regs.h> |
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#include <linux/ptrace.h> |
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#include <linux/kernel.h> |
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#include <linux/stringify.h> |
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struct pt_regs_dwarfnum { |
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const char *name; |
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unsigned int dwarfnum; |
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unsigned int ptregs_offset; |
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}; |
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#define REG_DWARFNUM_NAME(r, num) \ |
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{.name = __stringify(%)__stringify(r), .dwarfnum = num, \ |
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.ptregs_offset = offsetof(struct pt_regs, r)} |
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#define GPR_DWARFNUM_NAME(num) \ |
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{.name = __stringify(%gpr##num), .dwarfnum = num, \ |
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.ptregs_offset = offsetof(struct pt_regs, gpr[num])} |
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#define REG_DWARFNUM_END {.name = NULL, .dwarfnum = 0, .ptregs_offset = 0} |
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/* |
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* Reference: |
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* http://refspecs.linuxfoundation.org/ELF/ppc64/PPC-elf64abi-1.9.html |
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*/ |
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static const struct pt_regs_dwarfnum regdwarfnum_table[] = { |
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GPR_DWARFNUM_NAME(0), |
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GPR_DWARFNUM_NAME(1), |
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GPR_DWARFNUM_NAME(2), |
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GPR_DWARFNUM_NAME(3), |
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GPR_DWARFNUM_NAME(4), |
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GPR_DWARFNUM_NAME(5), |
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GPR_DWARFNUM_NAME(6), |
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GPR_DWARFNUM_NAME(7), |
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GPR_DWARFNUM_NAME(8), |
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GPR_DWARFNUM_NAME(9), |
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GPR_DWARFNUM_NAME(10), |
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GPR_DWARFNUM_NAME(11), |
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GPR_DWARFNUM_NAME(12), |
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GPR_DWARFNUM_NAME(13), |
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GPR_DWARFNUM_NAME(14), |
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GPR_DWARFNUM_NAME(15), |
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GPR_DWARFNUM_NAME(16), |
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GPR_DWARFNUM_NAME(17), |
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GPR_DWARFNUM_NAME(18), |
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GPR_DWARFNUM_NAME(19), |
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GPR_DWARFNUM_NAME(20), |
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GPR_DWARFNUM_NAME(21), |
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GPR_DWARFNUM_NAME(22), |
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GPR_DWARFNUM_NAME(23), |
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GPR_DWARFNUM_NAME(24), |
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GPR_DWARFNUM_NAME(25), |
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GPR_DWARFNUM_NAME(26), |
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GPR_DWARFNUM_NAME(27), |
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GPR_DWARFNUM_NAME(28), |
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GPR_DWARFNUM_NAME(29), |
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GPR_DWARFNUM_NAME(30), |
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GPR_DWARFNUM_NAME(31), |
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REG_DWARFNUM_NAME(msr, 66), |
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REG_DWARFNUM_NAME(ctr, 109), |
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REG_DWARFNUM_NAME(link, 108), |
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REG_DWARFNUM_NAME(xer, 101), |
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REG_DWARFNUM_NAME(dar, 119), |
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REG_DWARFNUM_NAME(dsisr, 118), |
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REG_DWARFNUM_END, |
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}; |
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/** |
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* get_arch_regstr() - lookup register name from it's DWARF register number |
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* @n: the DWARF register number |
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* |
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* get_arch_regstr() returns the name of the register in struct |
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* regdwarfnum_table from it's DWARF register number. If the register is not |
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* found in the table, this returns NULL; |
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*/ |
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const char *get_arch_regstr(unsigned int n) |
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{ |
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const struct pt_regs_dwarfnum *roff; |
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for (roff = regdwarfnum_table; roff->name != NULL; roff++) |
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if (roff->dwarfnum == n) |
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return roff->name; |
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return NULL; |
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} |
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int regs_query_register_offset(const char *name) |
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{ |
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const struct pt_regs_dwarfnum *roff; |
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for (roff = regdwarfnum_table; roff->name != NULL; roff++) |
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if (!strcmp(roff->name, name)) |
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return roff->ptregs_offset; |
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return -EINVAL; |
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}
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