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(name: 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 | |