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 # This program and the accompanying materials
   9 # are licensed and made available under the terms and conditions of the BSD License
  10 # which accompanies this distribution.  The full text of the license may be found at
  11 # http://opensource.org/licenses/bsd-license.php.
  12 #
  13 # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  14 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  15 #
  16 #------------------------------------------------------------------------------
  17
  18 .text
  19 .p2align 2
  20 GCC_ASM_EXPORT(CpuBreakpoint)
  21
  22 #/**
  23 #  Generates a breakpoint on the CPU.
  24 #
  25 #  Generates a breakpoint on the CPU. The breakpoint must be implemented such
  26 #  that code can resume normal execution after the breakpoint.
  27 #
  28 #**/
  29 #VOID
  30 #EFIAPI
  31 #CpuBreakpoint (
  32 #  VOID
  33 #  );
  34 #
  35 ASM_PFX(CpuBreakpoint):
  36     svc   0xdbdb    // Superviser exception. Takes 16bit arg -> Armv7 had 'swi' here.
  37     ret