ARM: 6198/1: perf probe: Add ARM DWARF register number mappings

ifndef NO_DWARF

PERF_HAVE_DWARF_REGS := 1

LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/dwarf-regs.o

endif

/*

 * 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 <libio.h>

#include <dwarf-regs.h>

struct pt_regs_dwarfnum {

	const char *name;

	unsigned int dwarfnum;

};

#define STR(s) #s

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

#define GPR_DWARFNUM_NAME(num) \

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

#define REG_DWARFNUM_END {.name = NULL, .dwarfnum = 0}

/*

 * Reference:

 * http://infocenter.arm.com/help/topic/com.arm.doc.ihi0040a/IHI0040A_aadwarf.pdf

 */

static const struct pt_regs_dwarfnum regdwarfnum_table[] = {

	GPR_DWARFNUM_NAME(0),

	GPR_DWARFNUM_NAME(1),

	GPR_DWARFNUM_NAME(2),

	GPR_DWARFNUM_NAME(3),

	GPR_DWARFNUM_NAME(4),

	GPR_DWARFNUM_NAME(5),

	GPR_DWARFNUM_NAME(6),

	GPR_DWARFNUM_NAME(7),

	GPR_DWARFNUM_NAME(8),

	GPR_DWARFNUM_NAME(9),

	GPR_DWARFNUM_NAME(10),

	REG_DWARFNUM_NAME("%fp", 11),

	REG_DWARFNUM_NAME("%ip", 12),

	REG_DWARFNUM_NAME("%sp", 13),

	REG_DWARFNUM_NAME("%lr", 14),

	REG_DWARFNUM_NAME("%pc", 15),

	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;

}