1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * dwarf-regs.c : Mapping of DWARF debug register numbers into register names.
 4 *
 5 * Written by: Masami Hiramatsu <mhiramat@kernel.org>
 6 */
 7
 
 
 8#include <debug.h>
 9#include <dwarf-regs.h>
10#include <elf.h>
 
11#include <linux/kernel.h>
12
13#ifndef EM_AARCH64
14#define EM_AARCH64	183  /* ARM 64 bit */
15#endif
16
 
 
 
 
17/* Define const char * {arch}_register_tbl[] */
18#define DEFINE_DWARF_REGSTR_TABLE
19#include "../arch/x86/include/dwarf-regs-table.h"
20#include "../arch/arm/include/dwarf-regs-table.h"
21#include "../arch/arm64/include/dwarf-regs-table.h"
22#include "../arch/sh/include/dwarf-regs-table.h"
23#include "../arch/powerpc/include/dwarf-regs-table.h"
24#include "../arch/s390/include/dwarf-regs-table.h"
25#include "../arch/sparc/include/dwarf-regs-table.h"
26#include "../arch/xtensa/include/dwarf-regs-table.h"
 
 
27
28#define __get_dwarf_regstr(tbl, n) (((n) < ARRAY_SIZE(tbl)) ? (tbl)[(n)] : NULL)
29
30/* Return architecture dependent register string (for kprobe-tracer) */
31const char *get_dwarf_regstr(unsigned int n, unsigned int machine)
32{
33	switch (machine) {
34	case EM_NONE:	/* Generic arch - use host arch */
35		return get_arch_regstr(n);
36	case EM_386:
37		return __get_dwarf_regstr(x86_32_regstr_tbl, n);
38	case EM_X86_64:
39		return __get_dwarf_regstr(x86_64_regstr_tbl, n);
40	case EM_ARM:
41		return __get_dwarf_regstr(arm_regstr_tbl, n);
42	case EM_AARCH64:
43		return __get_dwarf_regstr(aarch64_regstr_tbl, n);
44	case EM_SH:
45		return __get_dwarf_regstr(sh_regstr_tbl, n);
46	case EM_S390:
47		return __get_dwarf_regstr(s390_regstr_tbl, n);
48	case EM_PPC:
49	case EM_PPC64:
50		return __get_dwarf_regstr(powerpc_regstr_tbl, n);
51	case EM_SPARC:
52	case EM_SPARCV9:
53		return __get_dwarf_regstr(sparc_regstr_tbl, n);
54	case EM_XTENSA:
55		return __get_dwarf_regstr(xtensa_regstr_tbl, n);
 
 
 
 
56	default:
57		pr_err("ELF MACHINE %x is not supported.\n", machine);
58	}
59	return NULL;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
60}

  1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * dwarf-regs.c : Mapping of DWARF debug register numbers into register names.
  4 *
  5 * Written by: Masami Hiramatsu <mhiramat@kernel.org>
  6 */
  7
  8#include <stdlib.h>
  9#include <string.h>
 10#include <debug.h>
 11#include <dwarf-regs.h>
 12#include <elf.h>
 13#include <errno.h>
 14#include <linux/kernel.h>
 15
 16#ifndef EM_AARCH64
 17#define EM_AARCH64	183  /* ARM 64 bit */
 18#endif
 19
 20#ifndef EM_LOONGARCH
 21#define EM_LOONGARCH	258 /* LoongArch */
 22#endif
 23
 24/* Define const char * {arch}_register_tbl[] */
 25#define DEFINE_DWARF_REGSTR_TABLE
 26#include "../arch/x86/include/dwarf-regs-table.h"
 27#include "../arch/arm/include/dwarf-regs-table.h"
 28#include "../arch/arm64/include/dwarf-regs-table.h"
 29#include "../arch/sh/include/dwarf-regs-table.h"
 30#include "../arch/powerpc/include/dwarf-regs-table.h"
 31#include "../arch/s390/include/dwarf-regs-table.h"
 32#include "../arch/sparc/include/dwarf-regs-table.h"
 33#include "../arch/xtensa/include/dwarf-regs-table.h"
 34#include "../arch/mips/include/dwarf-regs-table.h"
 35#include "../arch/loongarch/include/dwarf-regs-table.h"
 36
 37#define __get_dwarf_regstr(tbl, n) (((n) < ARRAY_SIZE(tbl)) ? (tbl)[(n)] : NULL)
 38
 39/* Return architecture dependent register string (for kprobe-tracer) */
 40const char *get_dwarf_regstr(unsigned int n, unsigned int machine)
 41{
 42	switch (machine) {
 43	case EM_NONE:	/* Generic arch - use host arch */
 44		return get_arch_regstr(n);
 45	case EM_386:
 46		return __get_dwarf_regstr(x86_32_regstr_tbl, n);
 47	case EM_X86_64:
 48		return __get_dwarf_regstr(x86_64_regstr_tbl, n);
 49	case EM_ARM:
 50		return __get_dwarf_regstr(arm_regstr_tbl, n);
 51	case EM_AARCH64:
 52		return __get_dwarf_regstr(aarch64_regstr_tbl, n);
 53	case EM_SH:
 54		return __get_dwarf_regstr(sh_regstr_tbl, n);
 55	case EM_S390:
 56		return __get_dwarf_regstr(s390_regstr_tbl, n);
 57	case EM_PPC:
 58	case EM_PPC64:
 59		return __get_dwarf_regstr(powerpc_regstr_tbl, n);
 60	case EM_SPARC:
 61	case EM_SPARCV9:
 62		return __get_dwarf_regstr(sparc_regstr_tbl, n);
 63	case EM_XTENSA:
 64		return __get_dwarf_regstr(xtensa_regstr_tbl, n);
 65	case EM_MIPS:
 66		return __get_dwarf_regstr(mips_regstr_tbl, n);
 67	case EM_LOONGARCH:
 68		return __get_dwarf_regstr(loongarch_regstr_tbl, n);
 69	default:
 70		pr_err("ELF MACHINE %x is not supported.\n", machine);
 71	}
 72	return NULL;
 73}
 74
 75__weak int get_arch_regnum(const char *name __maybe_unused)
 76{
 77	return -ENOTSUP;
 78}
 79
 80/* Return DWARF register number from architecture register name */
 81int get_dwarf_regnum(const char *name, unsigned int machine)
 82{
 83	char *regname = strdup(name);
 84	int reg = -1;
 85	char *p;
 86
 87	if (regname == NULL)
 88		return -EINVAL;
 89
 90	/* For convenience, remove trailing characters */
 91	p = strpbrk(regname, " ,)");
 92	if (p)
 93		*p = '\0';
 94
 95	switch (machine) {
 96	case EM_NONE:	/* Generic arch - use host arch */
 97		reg = get_arch_regnum(regname);
 98		break;
 99	default:
100		pr_err("ELF MACHINE %x is not supported.\n", machine);
101	}
102	free(regname);
103	return reg;
104}