1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/compiler.h> 3 #include <errno.h> 4 #include <stdlib.h> 5 #include <string.h> 6 #include <linux/zalloc.h> 7 #include <regex.h> 8 #include "../annotate.h" 9 #include "../disasm.h" 10 11 struct arch_arm64 { 12 struct arch arch; 13 regex_t call_insn; 14 regex_t jump_insn; 15 }; 16 17 static int arm64_mov__parse(const struct arch *arch __maybe_unused, 18 struct ins_operands *ops, 19 struct map_symbol *ms __maybe_unused, 20 struct disasm_line *dl __maybe_unused) 21 { 22 char *s = strchr(ops->raw, ','), *target, *endptr; 23 24 if (s == NULL) 25 return -1; 26 27 *s = '\0'; 28 ops->source.raw = strdup(ops->raw); 29 *s = ','; 30 31 if (ops->source.raw == NULL) 32 return -1; 33 34 target = ++s; 35 ops->target.raw = strdup(target); 36 if (ops->target.raw == NULL) 37 goto out_free_source; 38 39 ops->target.addr = strtoull(target, &endptr, 16); 40 if (endptr == target) 41 goto out_free_target; 42 43 s = strchr(endptr, '<'); 44 if (s == NULL) 45 goto out_free_target; 46 endptr = strchr(s + 1, '>'); 47 if (endptr == NULL) 48 goto out_free_target; 49 50 *endptr = '\0'; 51 *s = ' '; 52 ops->target.name = strdup(s); 53 *s = '<'; 54 *endptr = '>'; 55 if (ops->target.name == NULL) 56 goto out_free_target; 57 58 return 0; 59 60 out_free_target: 61 zfree(&ops->target.raw); 62 out_free_source: 63 zfree(&ops->source.raw); 64 return -1; 65 } 66 67 static const struct ins_ops arm64_mov_ops = { 68 .parse = arm64_mov__parse, 69 .scnprintf = mov__scnprintf, 70 }; 71 72 static const struct ins_ops *arm64__associate_instruction_ops(struct arch *arch, const char *name) 73 { 74 struct arch_arm64 *arm = container_of(arch, struct arch_arm64, arch); 75 const struct ins_ops *ops; 76 regmatch_t match[2]; 77 78 if (!regexec(&arm->jump_insn, name, 2, match, 0)) 79 ops = &jump_ops; 80 else if (!regexec(&arm->call_insn, name, 2, match, 0)) 81 ops = &call_ops; 82 else if (!strcmp(name, "ret")) 83 ops = &ret_ops; 84 else 85 ops = &arm64_mov_ops; 86 87 arch__associate_ins_ops(arch, name, ops); 88 return ops; 89 } 90 91 const struct arch *arch__new_arm64(const struct e_machine_and_e_flags *id, 92 const char *cpuid __maybe_unused) 93 { 94 int err; 95 struct arch_arm64 *arm = zalloc(sizeof(*arm)); 96 struct arch *arch; 97 98 if (!arm) 99 return NULL; 100 101 arch = &arm->arch; 102 arch->name = "arm64"; 103 arch->id = *id; 104 arch->objdump.comment_char = '/'; 105 arch->objdump.skip_functions_char = '+'; 106 arch->associate_instruction_ops = arm64__associate_instruction_ops; 107 108 /* bl, blr */ 109 err = regcomp(&arm->call_insn, "^blr?$", REG_EXTENDED); 110 if (err) 111 goto out_free_arm; 112 113 /* b, b.cond, br, cbz/cbnz, tbz/tbnz */ 114 err = regcomp(&arm->jump_insn, "^[ct]?br?\\.?(cc|cs|eq|ge|gt|hi|hs|le|lo|ls|lt|mi|ne|pl|vc|vs)?n?z?$", 115 REG_EXTENDED); 116 if (err) 117 goto out_free_call; 118 119 return arch; 120 121 out_free_call: 122 regfree(&arm->call_insn); 123 out_free_arm: 124 free(arm); 125 errno = SYMBOL_ANNOTATE_ERRNO__ARCH_INIT_REGEXP; 126 return NULL; 127 } 128