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1// SPDX-License-Identifier: GPL-2.02#include <linux/compiler.h>3#include <linux/zalloc.h>4#include <sys/types.h>5#include <regex.h>6#include <stdlib.h>7 8struct arm_annotate {9 regex_t call_insn,10 jump_insn;11};12 13static 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 else24 return NULL;25 26 arch__associate_ins_ops(arch, name, ops);27 return ops;28}29 30static 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_CONDS50 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 58out_free_call:59 regfree(&arm->call_insn);60out_free_arm:61 free(arm);62 return SYMBOL_ANNOTATE_ERRNO__ARCH_INIT_REGEXP;63}64