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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/tools/perf/arch/powerpc/util/dwarf-regs.c
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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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 * This program is free software; you can redistribute it and/or

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 * modify it under the terms of the GNU General Public License

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 * as published by the Free Software Foundation; either version

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 * 2 of the License, or (at your option) any later version.

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 */

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#include <libio.h>

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#include <dwarf-regs.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 STR(s) #s

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#define REG_DWARFNUM_NAME(r, num) {.name = r, .dwarfnum = num}

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#define GPR_DWARFNUM_NAME(num)	\

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	{.name = STR(%gpr##num), .dwarfnum = num}

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#define REG_DWARFNUM_END {.name = NULL, .dwarfnum = 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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