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

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