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

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <sys/types.h>
   3 #include <regex.h>
   4
   5 struct arm64_annotate {
   6         regex_t call_insn,
   7                 jump_insn;
   8 };
   9
  10 static struct ins_ops *arm64__associate_instruction_ops(struct arch *arch, const char *name)
  11 {
  12         struct arm64_annotate *arm = arch->priv;
  13         struct ins_ops *ops;
  14         regmatch_t match[2];
  15
  16         if (!regexec(&arm->jump_insn, name, 2, match, 0))
  17                 ops = &jump_ops;
  18         else if (!regexec(&arm->call_insn, name, 2, match, 0))
  19                 ops = &call_ops;
  20         else if (!strcmp(name, "ret"))
  21                 ops = &ret_ops;
  22         else
  23                 return NULL;
  24
  25         arch__associate_ins_ops(arch, name, ops);
  26         return ops;
  27 }
  28
  29 static int arm64__annotate_init(struct arch *arch)
  30 {
  31         struct arm64_annotate *arm;
  32         int err;
  33
  34         if (arch->initialized)
  35                 return 0;
  36
  37         arm = zalloc(sizeof(*arm));
  38         if (!arm)
  39                 return -1;
  40
  41         /* bl, blr */
  42         err = regcomp(&arm->call_insn, "^blr?$", REG_EXTENDED);
  43         if (err)
  44                 goto out_free_arm;
  45         /* b, b.cond, br, cbz/cbnz, tbz/tbnz */
  46         err = regcomp(&arm->jump_insn, "^[ct]?br?\\.?(cc|cs|eq|ge|gt|hi|le|ls|lt|mi|ne|pl)?n?z?$",
  47                       REG_EXTENDED);
  48         if (err)
  49                 goto out_free_call;
  50
  51         arch->initialized = true;
  52         arch->priv        = arm;
  53         arch->associate_instruction_ops   = arm64__associate_instruction_ops;
  54         arch->objdump.comment_char        = '/';
  55         arch->objdump.skip_functions_char = '+';
  56         return 0;
  57
  58 out_free_call:
  59         regfree(&arm->call_insn);
  60 out_free_arm:
  61         free(arm);
  62         return -1;
  63 }