| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | #include <linux/compiler.h> |
| 3 | #include <sys/types.h> |
| 4 | #include <regex.h> |
| 5 | #include <stdlib.h> |
| 6 | |
| 7 | struct arm64_annotate { |
| 8 | regex_t call_insn, |
| 9 | jump_insn; |
| 10 | }; |
| 11 | |
| 12 | static int arm64_mov__parse(struct arch *arch __maybe_unused, |
| 13 | struct ins_operands *ops, |
| 14 | struct map_symbol *ms __maybe_unused) |
| 15 | { |
| 16 | char *s = strchr(ops->raw, ','), *target, *endptr; |
| 17 | |
| 18 | if (s == NULL) |
| 19 | return -1; |
| 20 | |
| 21 | *s = '\0'; |
| 22 | ops->source.raw = strdup(ops->raw); |
| 23 | *s = ','; |
| 24 | |
| 25 | if (ops->source.raw == NULL) |
| 26 | return -1; |
| 27 | |
| 28 | target = ++s; |
| 29 | ops->target.raw = strdup(target); |
| 30 | if (ops->target.raw == NULL) |
| 31 | goto out_free_source; |
| 32 | |
| 33 | ops->target.addr = strtoull(target, &endptr, 16); |
| 34 | if (endptr == target) |
| 35 | goto out_free_target; |
| 36 | |
| 37 | s = strchr(endptr, '<'); |
| 38 | if (s == NULL) |
| 39 | goto out_free_target; |
| 40 | endptr = strchr(s + 1, '>'); |
| 41 | if (endptr == NULL) |
| 42 | goto out_free_target; |
| 43 | |
| 44 | *endptr = '\0'; |
| 45 | *s = ' '; |
| 46 | ops->target.name = strdup(s); |
| 47 | *s = '<'; |
| 48 | *endptr = '>'; |
| 49 | if (ops->target.name == NULL) |
| 50 | goto out_free_target; |
| 51 | |
| 52 | return 0; |
| 53 | |
| 54 | out_free_target: |
| 55 | zfree(&ops->target.raw); |
| 56 | out_free_source: |
| 57 | zfree(&ops->source.raw); |
| 58 | return -1; |
| 59 | } |
| 60 | |
| 61 | static int mov__scnprintf(struct ins *ins, char *bf, size_t size, |
| 62 | struct ins_operands *ops, int max_ins_name); |
| 63 | |
| 64 | static struct ins_ops arm64_mov_ops = { |
| 65 | .parse = arm64_mov__parse, |
| 66 | .scnprintf = mov__scnprintf, |
| 67 | }; |
| 68 | |
| 69 | static struct ins_ops *arm64__associate_instruction_ops(struct arch *arch, const char *name) |
| 70 | { |
| 71 | struct arm64_annotate *arm = arch->priv; |
| 72 | struct ins_ops *ops; |
| 73 | regmatch_t match[2]; |
| 74 | |
| 75 | if (!regexec(&arm->jump_insn, name, 2, match, 0)) |
| 76 | ops = &jump_ops; |
| 77 | else if (!regexec(&arm->call_insn, name, 2, match, 0)) |
| 78 | ops = &call_ops; |
| 79 | else if (!strcmp(name, "ret")) |
| 80 | ops = &ret_ops; |
| 81 | else |
| 82 | ops = &arm64_mov_ops; |
| 83 | |
| 84 | arch__associate_ins_ops(arch, name, ops); |
| 85 | return ops; |
| 86 | } |
| 87 | |
| 88 | static int arm64__annotate_init(struct arch *arch, char *cpuid __maybe_unused) |
| 89 | { |
| 90 | struct arm64_annotate *arm; |
| 91 | int err; |
| 92 | |
| 93 | if (arch->initialized) |
| 94 | return 0; |
| 95 | |
| 96 | arm = zalloc(sizeof(*arm)); |
| 97 | if (!arm) |
| 98 | return ENOMEM; |
| 99 | |
| 100 | /* bl, blr */ |
| 101 | err = regcomp(&arm->call_insn, "^blr?$", REG_EXTENDED); |
| 102 | if (err) |
| 103 | goto out_free_arm; |
| 104 | /* b, b.cond, br, cbz/cbnz, tbz/tbnz */ |
| 105 | err = regcomp(&arm->jump_insn, "^[ct]?br?\\.?(cc|cs|eq|ge|gt|hi|le|ls|lt|mi|ne|pl)?n?z?$", |
| 106 | REG_EXTENDED); |
| 107 | if (err) |
| 108 | goto out_free_call; |
| 109 | |
| 110 | arch->initialized = true; |
| 111 | arch->priv = arm; |
| 112 | arch->associate_instruction_ops = arm64__associate_instruction_ops; |
| 113 | arch->objdump.comment_char = '/'; |
| 114 | arch->objdump.skip_functions_char = '+'; |
| 115 | return 0; |
| 116 | |
| 117 | out_free_call: |
| 118 | regfree(&arm->call_insn); |
| 119 | out_free_arm: |
| 120 | free(arm); |
| 121 | return SYMBOL_ANNOTATE_ERRNO__ARCH_INIT_REGEXP; |
| 122 | } |