2874c5fd28
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
102 lines
2.6 KiB
C
102 lines
2.6 KiB
C
// 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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#include "util.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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