cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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dwarf-regs.c (1616B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * Mapping of DWARF debug register numbers into register names.
      4 *
      5 * Copyright (C) 2010 Will Deacon, ARM Ltd.
      6 */
      7
      8#include <stddef.h>
      9#include <linux/stringify.h>
     10#include <dwarf-regs.h>
     11
     12struct pt_regs_dwarfnum {
     13	const char *name;
     14	unsigned int dwarfnum;
     15};
     16
     17#define REG_DWARFNUM_NAME(r, num) {.name = r, .dwarfnum = num}
     18#define GPR_DWARFNUM_NAME(num) \
     19	{.name = __stringify(%r##num), .dwarfnum = num}
     20#define REG_DWARFNUM_END {.name = NULL, .dwarfnum = 0}
     21
     22/*
     23 * Reference:
     24 * http://infocenter.arm.com/help/topic/com.arm.doc.ihi0040a/IHI0040A_aadwarf.pdf
     25 */
     26static const struct pt_regs_dwarfnum regdwarfnum_table[] = {
     27	GPR_DWARFNUM_NAME(0),
     28	GPR_DWARFNUM_NAME(1),
     29	GPR_DWARFNUM_NAME(2),
     30	GPR_DWARFNUM_NAME(3),
     31	GPR_DWARFNUM_NAME(4),
     32	GPR_DWARFNUM_NAME(5),
     33	GPR_DWARFNUM_NAME(6),
     34	GPR_DWARFNUM_NAME(7),
     35	GPR_DWARFNUM_NAME(8),
     36	GPR_DWARFNUM_NAME(9),
     37	GPR_DWARFNUM_NAME(10),
     38	REG_DWARFNUM_NAME("%fp", 11),
     39	REG_DWARFNUM_NAME("%ip", 12),
     40	REG_DWARFNUM_NAME("%sp", 13),
     41	REG_DWARFNUM_NAME("%lr", 14),
     42	REG_DWARFNUM_NAME("%pc", 15),
     43	REG_DWARFNUM_END,
     44};
     45
     46/**
     47 * get_arch_regstr() - lookup register name from it's DWARF register number
     48 * @n:	the DWARF register number
     49 *
     50 * get_arch_regstr() returns the name of the register in struct
     51 * regdwarfnum_table from it's DWARF register number. If the register is not
     52 * found in the table, this returns NULL;
     53 */
     54const char *get_arch_regstr(unsigned int n)
     55{
     56	const struct pt_regs_dwarfnum *roff;
     57	for (roff = regdwarfnum_table; roff->name != NULL; roff++)
     58		if (roff->dwarfnum == n)
     59			return roff->name;
     60	return NULL;
     61}