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 #include <stdlib.h>
   7
   8 struct arm_annotate {
   9         regex_t call_insn,
  10                 jump_insn;
  11 };
  12
  13 static struct ins_ops *arm__associate_instruction_ops(struct arch *arch, const char *name)
  14 {
  15         struct arm_annotate *arm = arch->priv;
  16         struct ins_ops *ops;
  17         regmatch_t match[2];
  18
  19         if (!regexec(&arm->call_insn, name, 2, match, 0))
  20                 ops = &call_ops;
  21         else if (!regexec(&arm->jump_insn, name, 2, match, 0))
  22                 ops = &jump_ops;
  23         else
  24                 return NULL;
  25
  26         arch__associate_ins_ops(arch, name, ops);
  27         return ops;
  28 }
  29
  30 static int arm__annotate_init(struct arch *arch, char *cpuid __maybe_unused)
  31 {
  32         struct arm_annotate *arm;
  33         int err;
  34
  35         if (arch->initialized)
  36                 return 0;
  37
  38         arm = zalloc(sizeof(*arm));
  39         if (!arm)
  40                 return ENOMEM;
  41
  42 #define ARM_CONDS "(cc|cs|eq|ge|gt|hi|le|ls|lt|mi|ne|pl|vc|vs)"
  43         err = regcomp(&arm->call_insn, "^blx?" ARM_CONDS "?$", REG_EXTENDED);
  44         if (err)
  45                 goto out_free_arm;
  46         err = regcomp(&arm->jump_insn, "^bx?" ARM_CONDS "?$", REG_EXTENDED);
  47         if (err)
  48                 goto out_free_call;
  49 #undef ARM_CONDS
  50
  51         arch->initialized = true;
  52         arch->priv        = arm;
  53         arch->associate_instruction_ops   = arm__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 SYMBOL_ANNOTATE_ERRNO__ARCH_INIT_REGEXP;
  63 }