MdePkg/Library/BaseLib/AArch64/CpuBreakpoint.S

   1 #------------------------------------------------------------------------------
   2 #
   3 # CpuBreakpoint() for AArch64
   4 #
   5 # Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
   6 # Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
   7 # Portions copyright (c) 2011 - 2013, ARM Ltd. All rights reserved.<BR>
   8 # SPDX-License-Identifier: BSD-2-Clause-Patent
   9 #
  10 #------------------------------------------------------------------------------
  11
  12 .text
  13 .p2align 2
  14 GCC_ASM_EXPORT(CpuBreakpoint)
  15
  16 #/**
  17 #  Generates a breakpoint on the CPU.
  18 #
  19 #  Generates a breakpoint on the CPU. The breakpoint must be implemented such
  20 #  that code can resume normal execution after the breakpoint.
  21 #
  22 #**/
  23 #VOID
  24 #EFIAPI
  25 #CpuBreakpoint (
  26 #  VOID
  27 #  );
  28 #
  29 ASM_PFX(CpuBreakpoint):
  30     svc   0xdbdb    // Superviser exception. Takes 16bit arg -> Armv7 had 'swi' here.
  31     ret