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