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