1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/compiler.h> 3 #include <linux/zalloc.h> 4 #include <sys/types.h> 5 #include <regex.h> 6 7 struct arm_annotate { 8 regex_t call_insn, 9 jump_insn; 10 }; 11 12 static struct ins_ops *arm__associate_instruction_ops(struct arch *arch, const char *name) 13 { 14 struct arm_annotate *arm = arch->priv; 15 struct ins_ops *ops; 16 regmatch_t match[2]; 17 18 if (!regexec(&arm->call_insn, name, 2, match, 0)) 19 ops = &call_ops; 20 else if (!regexec(&arm->jump_insn, name, 2, match, 0)) 21 ops = &jump_ops; 22 else 23 return NULL; 24 25 arch__associate_ins_ops(arch, name, ops); 26 return ops; 27 } 28 29 static int arm__annotate_init(struct arch *arch, char *cpuid __maybe_unused) 30 { 31 struct arm_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 #define ARM_CONDS "(cc|cs|eq|ge|gt|hi|le|ls|lt|mi|ne|pl|vc|vs)" 42 err = regcomp(&arm->call_insn, "^blx?" ARM_CONDS "?$", REG_EXTENDED); 43 if (err) 44 goto out_free_arm; 45 err = regcomp(&arm->jump_insn, "^bx?" ARM_CONDS "?$", REG_EXTENDED); 46 if (err) 47 goto out_free_call; 48 #undef ARM_CONDS 49 50 arch->initialized = true; 51 arch->priv = arm; 52 arch->associate_instruction_ops = arm__associate_instruction_ops; 53 arch->objdump.comment_char = ';'; 54 arch->objdump.skip_functions_char = '+'; 55 return 0; 56 57 out_free_call: 58 regfree(&arm->call_insn); 59 out_free_arm: 60 free(arm); 61 return -1; 62 } 63