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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/tools/perf/arch/x86/util/dwarf-regs.c
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/*

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 * dwarf-regs.c : Mapping of DWARF debug register numbers into register names.

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 * Extracted from probe-finder.c

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 *

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 * Written by Masami Hiramatsu <[email protected]>

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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 as published by

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 * the Free Software Foundation; either version 2 of the License, or

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 * (at your option) any later version.

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 *

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 * This program is distributed in the hope that it will be useful,

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 * but WITHOUT ANY WARRANTY; without even the implied warranty of

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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

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 * GNU General Public License for more details.

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 *

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 * You should have received a copy of the GNU General Public License

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 * along with this program; if not, write to the Free Software

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 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

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 *

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 */

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#include <libio.h>

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#include <dwarf-regs.h>

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/*

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 * Generic dwarf analysis helpers

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 */

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#define X86_32_MAX_REGS 8

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const char *x86_32_regs_table[X86_32_MAX_REGS] = {

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	"%ax",

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	"%cx",

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	"%dx",

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	"%bx",

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	"$stack",	/* Stack address instead of %sp */

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	"%bp",

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	"%si",

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	"%di",

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};

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#define X86_64_MAX_REGS 16

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const char *x86_64_regs_table[X86_64_MAX_REGS] = {

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	"%ax",

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	"%dx",

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	"%cx",

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	"%bx",

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	"%si",

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	"%di",

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	"%bp",

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	"%sp",

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	"%r8",

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	"%r9",

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	"%r10",

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	"%r11",

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	"%r12",

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	"%r13",

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	"%r14",

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	"%r15",

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};

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/* TODO: switching by dwarf address size */

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#ifdef __x86_64__

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#define ARCH_MAX_REGS X86_64_MAX_REGS

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#define arch_regs_table x86_64_regs_table

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#else

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#define ARCH_MAX_REGS X86_32_MAX_REGS

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#define arch_regs_table x86_32_regs_table

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#endif

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/* Return architecture dependent register string (for kprobe-tracer) */

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const char *get_arch_regstr(unsigned int n)

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{

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	return (n <= ARCH_MAX_REGS) ? arch_regs_table[n] : NULL;

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}

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