1 // SPDX-License-Identifier: GPL-2.0 2 #include <sys/types.h> 3 #include <regex.h> 4 5 struct arm64_annotate { 6 regex_t call_insn, 7 jump_insn; 8 }; 9 10 static struct ins_ops *arm64__associate_instruction_ops(struct arch *arch, const char *name) 11 { 12 struct arm64_annotate *arm = arch->priv; 13 struct ins_ops *ops; 14 regmatch_t match[2]; 15 16 if (!regexec(&arm->jump_insn, name, 2, match, 0)) 17 ops = &jump_ops; 18 else if (!regexec(&arm->call_insn, name, 2, match, 0)) 19 ops = &call_ops; 20 else if (!strcmp(name, "ret")) 21 ops = &ret_ops; 22 else 23 return NULL; 24 25 arch__associate_ins_ops(arch, name, ops); 26 return ops; 27 } 28 29 static int arm64__annotate_init(struct arch *arch) 30 { 31 struct arm64_annotate *arm; 32 int err; 33 34 if (arch->initialized) 35 return 0; 36 37 arm = zalloc(sizeof(*arm)); 38 if (!arm) 39 return -1; 40 41 /* bl, blr */ 42 err = regcomp(&arm->call_insn, "^blr?$", REG_EXTENDED); 43 if (err) 44 goto out_free_arm; 45 /* b, b.cond, br, cbz/cbnz, tbz/tbnz */ 46 err = regcomp(&arm->jump_insn, "^[ct]?br?\\.?(cc|cs|eq|ge|gt|hi|le|ls|lt|mi|ne|pl)?n?z?$", 47 REG_EXTENDED); 48 if (err) 49 goto out_free_call; 50 51 arch->initialized = true; 52 arch->priv = arm; 53 arch->associate_instruction_ops = arm64__associate_instruction_ops; 54 arch->objdump.comment_char = '/'; 55 arch->objdump.skip_functions_char = '+'; 56 return 0; 57 58 out_free_call: 59 regfree(&arm->call_insn); 60 out_free_arm: 61 free(arm); 62 return -1; 63 } 64