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

   1#include <sys/types.h>
   2#include <regex.h>
   3
   4struct arm64_annotate {
   5        regex_t call_insn,
   6                jump_insn;
   7};
   8
   9static 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
  28static 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
  57out_free_call:
  58        regfree(&arm->call_insn);
  59out_free_arm:
  60        free(arm);
  61        return -1;
  62}
  63