LXR linux/tools/perf/arch/arm/annotate/instructions.c

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