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v5.4
 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}
v6.13.7
  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/* Define const char * {arch}_register_tbl[] */
 17#define DEFINE_DWARF_REGSTR_TABLE
 18#include "../arch/x86/include/dwarf-regs-table.h"
 19#include "../arch/arm/include/dwarf-regs-table.h"
 20#include "../arch/arm64/include/dwarf-regs-table.h"
 21#include "../arch/sh/include/dwarf-regs-table.h"
 22#include "../arch/powerpc/include/dwarf-regs-table.h"
 23#include "../arch/riscv/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#include "../arch/mips/include/dwarf-regs-table.h"
 28#include "../arch/loongarch/include/dwarf-regs-table.h"
 29
 30#define __get_dwarf_regstr(tbl, n) (((n) < ARRAY_SIZE(tbl)) ? (tbl)[(n)] : NULL)
 31
 32/* Return architecture dependent register string (for kprobe-tracer) */
 33const char *get_dwarf_regstr(unsigned int n, unsigned int machine, unsigned int flags)
 34{
 35	if (machine == EM_NONE) {
 36		/* Generic arch - use host arch */
 37		machine = EM_HOST;
 38	}
 39	switch (machine) {
 
 
 40	case EM_386:
 41		return __get_dwarf_regstr(x86_32_regstr_tbl, n);
 42	case EM_X86_64:
 43		return __get_dwarf_regstr(x86_64_regstr_tbl, n);
 44	case EM_ARM:
 45		return __get_dwarf_regstr(arm_regstr_tbl, n);
 46	case EM_AARCH64:
 47		return __get_dwarf_regstr(aarch64_regstr_tbl, n);
 48	case EM_CSKY:
 49		return get_csky_regstr(n, flags);
 50	case EM_SH:
 51		return __get_dwarf_regstr(sh_regstr_tbl, n);
 52	case EM_S390:
 53		return __get_dwarf_regstr(s390_regstr_tbl, n);
 54	case EM_PPC:
 55	case EM_PPC64:
 56		return __get_dwarf_regstr(powerpc_regstr_tbl, n);
 57	case EM_RISCV:
 58		return __get_dwarf_regstr(riscv_regstr_tbl, n);
 59	case EM_SPARC:
 60	case EM_SPARCV9:
 61		return __get_dwarf_regstr(sparc_regstr_tbl, n);
 62	case EM_XTENSA:
 63		return __get_dwarf_regstr(xtensa_regstr_tbl, n);
 64	case EM_MIPS:
 65		return __get_dwarf_regstr(mips_regstr_tbl, n);
 66	case EM_LOONGARCH:
 67		return __get_dwarf_regstr(loongarch_regstr_tbl, n);
 68	default:
 69		pr_err("ELF MACHINE %x is not supported.\n", machine);
 70	}
 71	return NULL;
 72}
 73
 74#if EM_HOST != EM_X86_64 && EM_HOST != EM_386
 75__weak int get_arch_regnum(const char *name __maybe_unused)
 76{
 77	return -ENOTSUP;
 78}
 79#endif
 80
 81/* Return DWARF register number from architecture register name */
 82int get_dwarf_regnum(const char *name, unsigned int machine, unsigned int flags __maybe_unused)
 83{
 84	char *regname = strdup(name);
 85	int reg = -1;
 86	char *p;
 87
 88	if (regname == NULL)
 89		return -EINVAL;
 90
 91	/* For convenience, remove trailing characters */
 92	p = strpbrk(regname, " ,)");
 93	if (p)
 94		*p = '\0';
 95
 96	if (machine == EM_NONE) {
 97		/* Generic arch - use host arch */
 98		machine = EM_HOST;
 99	}
100	switch (machine) {
101#if EM_HOST != EM_X86_64 && EM_HOST != EM_386
102	case EM_HOST:
103		reg = get_arch_regnum(regname);
104		break;
105#endif
106	case EM_X86_64:
107		fallthrough;
108	case EM_386:
109		reg = get_x86_regnum(regname);
110		break;
111	default:
112		pr_err("ELF MACHINE %x is not supported.\n", machine);
113	}
114	free(regname);
115	return reg;
116}