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

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