1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/compiler.h> 3 #include <linux/zalloc.h> 4 #include <errno.h> 5 #include <sys/types.h> 6 #include <regex.h> 7 #include <stdlib.h> 8 9 struct arm_annotate { 10 regex_t call_insn, 11 jump_insn; 12 }; 13 14 static struct ins_ops *arm__associate_instruction_ops(struct arch *arch, const char *name) 15 { 16 struct arm_annotate *arm = arch->priv; 17 struct ins_ops *ops; 18 regmatch_t match[2]; 19 20 if (!regexec(&arm->call_insn, name, 2, match, 0)) 21 ops = &call_ops; 22 else if (!regexec(&arm->jump_insn, name, 2, match, 0)) 23 ops = &jump_ops; 24 else 25 return NULL; 26 27 arch__associate_ins_ops(arch, name, ops); 28 return ops; 29 } 30 31 static int arm__annotate_init(struct arch *arch, char *cpuid __maybe_unused) 32 { 33 struct arm_annotate *arm; 34 int err; 35 36 if (arch->initialized) 37 return 0; 38 39 arm = zalloc(sizeof(*arm)); 40 if (!arm) 41 return ENOMEM; 42 43 #define ARM_CONDS "(cc|cs|eq|ge|gt|hi|le|ls|lt|mi|ne|pl|vc|vs)" 44 err = regcomp(&arm->call_insn, "^blx?" ARM_CONDS "?$", REG_EXTENDED); 45 if (err) 46 goto out_free_arm; 47 err = regcomp(&arm->jump_insn, "^bx?" ARM_CONDS "?$", REG_EXTENDED); 48 if (err) 49 goto out_free_call; 50 #undef ARM_CONDS 51 52 arch->initialized = true; 53 arch->priv = arm; 54 arch->associate_instruction_ops = arm__associate_instruction_ops; 55 arch->objdump.comment_char = ';'; 56 arch->objdump.skip_functions_char = '+'; 57 arch->e_machine = EM_ARM; 58 arch->e_flags = 0; 59 return 0; 60 61 out_free_call: 62 regfree(&arm->call_insn); 63 out_free_arm: 64 free(arm); 65 return SYMBOL_ANNOTATE_ERRNO__ARCH_INIT_REGEXP; 66 } 67