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

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/compiler.h>
   3 #include <sys/types.h>
   4 #include <regex.h>
   5
   6 struct arm64_annotate {
   7         regex_t call_insn,
   8                 jump_insn;
   9 };
  10
  11 static int arm64_mov__parse(struct arch *arch __maybe_unused,
  12                             struct ins_operands *ops,
  13                             struct map_symbol *ms __maybe_unused)
  14 {
  15         char *s = strchr(ops->raw, ','), *target, *endptr;
  16
  17         if (s == NULL)
  18                 return -1;
  19
  20         *s = '\0';
  21         ops->source.raw = strdup(ops->raw);
  22         *s = ',';
  23
  24         if (ops->source.raw == NULL)
  25                 return -1;
  26
  27         target = ++s;
  28         ops->target.raw = strdup(target);
  29         if (ops->target.raw == NULL)
  30                 goto out_free_source;
  31
  32         ops->target.addr = strtoull(target, &endptr, 16);
  33         if (endptr == target)
  34                 goto out_free_target;
  35
  36         s = strchr(endptr, '<');
  37         if (s == NULL)
  38                 goto out_free_target;
  39         endptr = strchr(s + 1, '>');
  40         if (endptr == NULL)
  41                 goto out_free_target;
  42
  43         *endptr = '\0';
  44         *s = ' ';
  45         ops->target.name = strdup(s);
  46         *s = '<';
  47         *endptr = '>';
  48         if (ops->target.name == NULL)
  49                 goto out_free_target;
  50
  51         return 0;
  52
  53 out_free_target:
  54         zfree(&ops->target.raw);
  55 out_free_source:
  56         zfree(&ops->source.raw);
  57         return -1;
  58 }
  59
  60 static int mov__scnprintf(struct ins *ins, char *bf, size_t size,
  61                           struct ins_operands *ops);
  62
  63 static struct ins_ops arm64_mov_ops = {
  64         .parse     = arm64_mov__parse,
  65         .scnprintf = mov__scnprintf,
  66 };
  67
  68 static struct ins_ops *arm64__associate_instruction_ops(struct arch *arch, const char *name)
  69 {
  70         struct arm64_annotate *arm = arch->priv;
  71         struct ins_ops *ops;
  72         regmatch_t match[2];
  73
  74         if (!regexec(&arm->jump_insn, name, 2, match, 0))
  75                 ops = &jump_ops;
  76         else if (!regexec(&arm->call_insn, name, 2, match, 0))
  77                 ops = &call_ops;
  78         else if (!strcmp(name, "ret"))
  79                 ops = &ret_ops;
  80         else
  81                 ops = &arm64_mov_ops;
  82
  83         arch__associate_ins_ops(arch, name, ops);
  84         return ops;
  85 }
  86
  87 static int arm64__annotate_init(struct arch *arch, char *cpuid __maybe_unused)
  88 {
  89         struct arm64_annotate *arm;
  90         int err;
  91
  92         if (arch->initialized)
  93                 return 0;
  94
  95         arm = zalloc(sizeof(*arm));
  96         if (!arm)
  97                 return -1;
  98
  99         /* bl, blr */
 100         err = regcomp(&arm->call_insn, "^blr?$", REG_EXTENDED);
 101         if (err)
 102                 goto out_free_arm;
 103         /* b, b.cond, br, cbz/cbnz, tbz/tbnz */
 104         err = regcomp(&arm->jump_insn, "^[ct]?br?\\.?(cc|cs|eq|ge|gt|hi|le|ls|lt|mi|ne|pl)?n?z?$",
 105                       REG_EXTENDED);
 106         if (err)
 107                 goto out_free_call;
 108
 109         arch->initialized = true;
 110         arch->priv        = arm;
 111         arch->associate_instruction_ops   = arm64__associate_instruction_ops;
 112         arch->objdump.comment_char        = '/';
 113         arch->objdump.skip_functions_char = '+';
 114         return 0;
 115
 116 out_free_call:
 117         regfree(&arm->call_insn);
 118 out_free_arm:
 119         free(arm);
 120         return -1;
 121 }