Ejemplo n.º 1
0
bool ABI::GetFallbackRegisterLocation(
    const RegisterInfo *reg_info,
    UnwindPlan::Row::RegisterLocation &unwind_regloc) {
  // Did the UnwindPlan fail to give us the caller's stack pointer?
  // The stack pointer is defined to be the same as THIS frame's CFA, so return
  // the CFA value as
  // the caller's stack pointer.  This is true on x86-32/x86-64 at least.
  if (reg_info->kinds[eRegisterKindGeneric] == LLDB_REGNUM_GENERIC_SP) {
    unwind_regloc.SetIsCFAPlusOffset(0);
    return true;
  }

  // If a volatile register is being requested, we don't want to forward the
  // next frame's register contents
  // up the stack -- the register is not retrievable at this frame.
  if (RegisterIsVolatile(reg_info)) {
    unwind_regloc.SetUndefined();
    return true;
  }

  return false;
}
Ejemplo n.º 2
0
bool ABISysV_s390x::GetFallbackRegisterLocation(
    const RegisterInfo *reg_info,
    UnwindPlan::Row::RegisterLocation &unwind_regloc) {
  // If a volatile register is being requested, we don't want to forward the
  // next frame's register contents up the stack -- the register is not
  // retrievable at this frame.
  if (RegisterIsVolatile(reg_info)) {
    unwind_regloc.SetUndefined();
    return true;
  }

  return false;
}