91 lines
2.5 KiB
C
91 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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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 Will Deacon, ARM Ltd.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <errno.h>
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#include <stddef.h>
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#include <string.h>
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#include <dwarf-regs.h>
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#include <linux/ptrace.h> /* for struct user_pt_regs */
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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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};
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#define REG_DWARFNUM_NAME(r, num) {.name = r, .dwarfnum = num}
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#define REG_DWARFNUM_END {.name = NULL, .dwarfnum = 0}
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static const struct pt_regs_dwarfnum regdwarfnum_table[] = {
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REG_DWARFNUM_NAME("%v0", 0),
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REG_DWARFNUM_NAME("%t0", 1),
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REG_DWARFNUM_NAME("%t1", 2),
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REG_DWARFNUM_NAME("%t2", 3),
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REG_DWARFNUM_NAME("%t3", 4),
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REG_DWARFNUM_NAME("%t4", 5),
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REG_DWARFNUM_NAME("%t5", 6),
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REG_DWARFNUM_NAME("%t6", 7),
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REG_DWARFNUM_NAME("%t7", 8),
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REG_DWARFNUM_NAME("%s0", 9),
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REG_DWARFNUM_NAME("%s1", 10),
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REG_DWARFNUM_NAME("%s2", 11),
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REG_DWARFNUM_NAME("%s3", 12),
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REG_DWARFNUM_NAME("%s4", 13),
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REG_DWARFNUM_NAME("%s5", 14),
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REG_DWARFNUM_NAME("%s6", 15),
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REG_DWARFNUM_NAME("%a0", 16),
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REG_DWARFNUM_NAME("%a1", 17),
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REG_DWARFNUM_NAME("%a2", 18),
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REG_DWARFNUM_NAME("%a3", 19),
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REG_DWARFNUM_NAME("%a4", 20),
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REG_DWARFNUM_NAME("%a5", 21),
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REG_DWARFNUM_NAME("%t8", 22),
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REG_DWARFNUM_NAME("%t9", 23),
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REG_DWARFNUM_NAME("%t10", 24),
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REG_DWARFNUM_NAME("%t11", 25),
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REG_DWARFNUM_NAME("%ra", 26),
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REG_DWARFNUM_NAME("%pv", 27),
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REG_DWARFNUM_NAME("%at", 28),
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REG_DWARFNUM_NAME("%gp", 29),
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REG_DWARFNUM_NAME("%sp", 30),
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REG_DWARFNUM_NAME("%zero", 31),
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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->dwarfnum;
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return -EINVAL;
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}
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