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
   6 struct arm_annotate {
   7         regex_t call_insn,
   8                 jump_insn;
   9 };
  10
  11 static 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
  28 static 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
  56 out_free_call:
  57         regfree(&arm->call_insn);
  58 out_free_arm:
  59         free(arm);
  60         return -1;
  61 }