tools/perf/arch/arm64/annotate/instructions.c

   1 #include <sys/types.h>
   2 #include <regex.h>
   3
   4 struct arm64_annotate {
   5         regex_t call_insn,
   6                 jump_insn;
   7 };
   8
   9 static struct ins_ops *arm64__associate_instruction_ops(struct arch *arch, const char *name)
  10 {
  11         struct arm64_annotate *arm = arch->priv;
  12         struct ins_ops *ops;
  13         regmatch_t match[2];
  14
  15         if (!regexec(&arm->jump_insn, name, 2, match, 0))
  16                 ops = &jump_ops;
  17         else if (!regexec(&arm->call_insn, name, 2, match, 0))
  18                 ops = &call_ops;
  19         else if (!strcmp(name, "ret"))
  20                 ops = &ret_ops;
  21         else
  22                 return NULL;
  23
  24         arch__associate_ins_ops(arch, name, ops);
  25         return ops;
  26 }
  27
  28 static int arm64__annotate_init(struct arch *arch)
  29 {
  30         struct arm64_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         /* bl, blr */
  41         err = regcomp(&arm->call_insn, "^blr?$", REG_EXTENDED);
  42         if (err)
  43                 goto out_free_arm;
  44         /* b, b.cond, br, cbz/cbnz, tbz/tbnz */
  45         err = regcomp(&arm->jump_insn, "^[ct]?br?\\.?(cc|cs|eq|ge|gt|hi|le|ls|lt|mi|ne|pl)?n?z?$",
  46                       REG_EXTENDED);
  47         if (err)
  48                 goto out_free_call;
  49
  50         arch->initialized = true;
  51         arch->priv        = arm;
  52         arch->associate_instruction_ops   = arm64__associate_instruction_ops;
  53         arch->objdump.comment_char        = ';';
  54         arch->objdump.skip_functions_char = '+';
  55         return 0;
  56
  57 out_free_call:
  58         regfree(&arm->call_insn);
  59 out_free_arm:
  60         free(arm);
  61         return -1;
  62 }