2026-01-21 18:59:54 +08:00

91 lines
2.5 KiB
C

// SPDX-License-Identifier: GPL-2.0
/*
* Mapping of DWARF debug register numbers into register names.
*
* Copyright (C) 2010 Will Deacon, ARM Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <errno.h>
#include <stddef.h>
#include <string.h>
#include <dwarf-regs.h>
#include <linux/ptrace.h> /* for struct user_pt_regs */
#include <linux/stringify.h>
#include "util.h"
struct pt_regs_dwarfnum {
const char *name;
unsigned int dwarfnum;
};
#define REG_DWARFNUM_NAME(r, num) {.name = r, .dwarfnum = num}
#define REG_DWARFNUM_END {.name = NULL, .dwarfnum = 0}
static const struct pt_regs_dwarfnum regdwarfnum_table[] = {
REG_DWARFNUM_NAME("%v0", 0),
REG_DWARFNUM_NAME("%t0", 1),
REG_DWARFNUM_NAME("%t1", 2),
REG_DWARFNUM_NAME("%t2", 3),
REG_DWARFNUM_NAME("%t3", 4),
REG_DWARFNUM_NAME("%t4", 5),
REG_DWARFNUM_NAME("%t5", 6),
REG_DWARFNUM_NAME("%t6", 7),
REG_DWARFNUM_NAME("%t7", 8),
REG_DWARFNUM_NAME("%s0", 9),
REG_DWARFNUM_NAME("%s1", 10),
REG_DWARFNUM_NAME("%s2", 11),
REG_DWARFNUM_NAME("%s3", 12),
REG_DWARFNUM_NAME("%s4", 13),
REG_DWARFNUM_NAME("%s5", 14),
REG_DWARFNUM_NAME("%s6", 15),
REG_DWARFNUM_NAME("%a0", 16),
REG_DWARFNUM_NAME("%a1", 17),
REG_DWARFNUM_NAME("%a2", 18),
REG_DWARFNUM_NAME("%a3", 19),
REG_DWARFNUM_NAME("%a4", 20),
REG_DWARFNUM_NAME("%a5", 21),
REG_DWARFNUM_NAME("%t8", 22),
REG_DWARFNUM_NAME("%t9", 23),
REG_DWARFNUM_NAME("%t10", 24),
REG_DWARFNUM_NAME("%t11", 25),
REG_DWARFNUM_NAME("%ra", 26),
REG_DWARFNUM_NAME("%pv", 27),
REG_DWARFNUM_NAME("%at", 28),
REG_DWARFNUM_NAME("%gp", 29),
REG_DWARFNUM_NAME("%sp", 30),
REG_DWARFNUM_NAME("%zero", 31),
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->dwarfnum;
return -EINVAL;
}