C++ (Cpp) arm_exidx_decode示例

示例#1

文件： Gstep.c 项目： bminor/libunwind

static inline int
arm_exidx_step (struct cursor *c)
{
  unw_word_t old_ip, old_cfa;
  uint8_t buf[32];
  int ret;

  old_ip = c->dwarf.ip;
  old_cfa = c->dwarf.cfa;

  /* mark PC unsaved */
  c->dwarf.loc[UNW_ARM_R15] = DWARF_NULL_LOC;
  unw_word_t ip = c->dwarf.ip;
  if (c->dwarf.use_prev_instr)
    --ip;

  /* check dynamic info first --- it overrides everything else */
  ret = unwi_find_dynamic_proc_info (c->dwarf.as, ip, &c->dwarf.pi, 1,
                                     c->dwarf.as_arg);
  if (ret == -UNW_ENOINFO)
    {
      if ((ret = tdep_find_proc_info (&c->dwarf, ip, 1)) < 0)
        return ret;
    }

  if (c->dwarf.pi.format != UNW_INFO_FORMAT_ARM_EXIDX)
    return -UNW_ENOINFO;

  ret = arm_exidx_extract (&c->dwarf, buf);
  if (ret == -UNW_ESTOPUNWIND)
    return 0;
  else if (ret < 0)
    return ret;

  ret = arm_exidx_decode (buf, ret, &c->dwarf);
  if (ret < 0)
    return ret;

  if (c->dwarf.ip == old_ip && c->dwarf.cfa == old_cfa)
    {
      Dprintf ("%s: ip and cfa unchanged; stopping here (ip=0x%lx)\n",
               __FUNCTION__, (long) c->dwarf.ip);
      return -UNW_EBADFRAME;
    }

  c->dwarf.pi_valid = 0;

  return (c->dwarf.ip == 0) ? 0 : 1;
}

示例#2

文件： Gstep.c 项目： 0-T-0/linux-sgx

static inline int
arm_exidx_step (struct cursor *c)
{
  unw_word_t old_ip, old_cfa;
  uint8_t buf[32];
  int ret;

  old_ip = c->dwarf.ip;
  old_cfa = c->dwarf.cfa;

  /* mark PC unsaved */
  c->dwarf.loc[UNW_ARM_R15] = DWARF_NULL_LOC;

  if ((ret = tdep_find_proc_info (&c->dwarf, c->dwarf.ip, 1)) < 0)
     return ret;

  if (c->dwarf.pi.format != UNW_INFO_FORMAT_ARM_EXIDX)
    return -UNW_ENOINFO;

  ret = arm_exidx_extract (&c->dwarf, buf);
  if (ret == -UNW_ESTOPUNWIND)
    return 0;
  else if (ret < 0)
    return ret;

  ret = arm_exidx_decode (buf, ret, &c->dwarf);
  if (ret < 0)
    return ret;

  if (c->dwarf.ip == old_ip && c->dwarf.cfa == old_cfa)
    {
      Dprintf ("%s: ip and cfa unchanged; stopping here (ip=0x%lx)\n",
	       __FUNCTION__, (long) c->dwarf.ip);
      return -UNW_EBADFRAME;
    }

  return (c->dwarf.ip == 0) ? 0 : 1;
}