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) */
40 const 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 */
81 int 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 }
105
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.