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 #include <stdlib.h> 7 8 struct arm_annotate { 9 regex_t call_insn, 10 jump_insn; 11 }; 12 13 static struct ins_ops *arm__associate_instruction_ops(struct arch *arch, const char *name) 14 { 15 struct arm_annotate *arm = arch->priv; 16 struct ins_ops *ops; 17 regmatch_t match[2]; 18 19 if (!regexec(&arm->call_insn, name, 2, match, 0)) 20 ops = &call_ops; 21 else if (!regexec(&arm->jump_insn, name, 2, match, 0)) 22 ops = &jump_ops; 23 else 24 return NULL; 25 26 arch__associate_ins_ops(arch, name, ops); 27 return ops; 28 } 29 30 static int arm__annotate_init(struct arch *arch, char *cpuid __maybe_unused) 31 { 32 struct arm_annotate *arm; 33 int err; 34 35 if (arch->initialized) 36 return 0; 37 38 arm = zalloc(sizeof(*arm)); 39 if (!arm) 40 return ENOMEM; 41 42 #define ARM_CONDS "(cc|cs|eq|ge|gt|hi|le|ls|lt|mi|ne|pl|vc|vs)" 43 err = regcomp(&arm->call_insn, "^blx?" ARM_CONDS "?$", REG_EXTENDED); 44 if (err) 45 goto out_free_arm; 46 err = regcomp(&arm->jump_insn, "^bx?" ARM_CONDS "?$", REG_EXTENDED); 47 if (err) 48 goto out_free_call; 49 #undef ARM_CONDS 50 51 arch->initialized = true; 52 arch->priv = arm; 53 arch->associate_instruction_ops = arm__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 SYMBOL_ANNOTATE_ERRNO__ARCH_INIT_REGEXP; 63 } 64