MdePkg: Replace BSD License with BSD+Patent License

[mirror_edk2.git] / MdePkg / Library / BaseLib / Arm / SetJumpLongJump.asm

;------------------------------------------------------------------------------\r
;\r
; Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r
; Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>\r
; SPDX-License-Identifier: BSD-2-Clause-Patent\r
;\r
;------------------------------------------------------------------------------\r
\r
  EXPORT  SetJump\r
  EXPORT  InternalLongJump\r
\r
  AREA  BaseLib, CODE, READONLY\r
\r
;/**\r
;  Saves the current CPU context that can be restored with a call to LongJump() and returns 0.;\r
;\r
;  Saves the current CPU context in the buffer specified by JumpBuffer and returns 0.  The initial\r
;  call to SetJump() must always return 0.  Subsequent calls to LongJump() cause a non-zero\r
;  value to be returned by SetJump().\r
;\r
;  If JumpBuffer is NULL, then ASSERT().\r
;  For IPF CPUs, if JumpBuffer is not aligned on a 16-byte boundary, then ASSERT().\r
;\r
;  @param  JumpBuffer    A pointer to CPU context buffer.\r
;\r
;**/\r
;\r
;UINTN\r
;EFIAPI\r
;SetJump (\r
;  IN      BASE_LIBRARY_JUMP_BUFFER  *JumpBuffer  // R0\r
;  )\r
;\r
SetJump\r
  MOV  R3, R13\r
  STM  R0, {R3-R12,R14}\r
  EOR  R0, R0\r
  BX   LR\r
\r
;/**\r
;  Restores the CPU context that was saved with SetJump().;\r
;\r
;  Restores the CPU context from the buffer specified by JumpBuffer.\r
;  This function never returns to the caller.\r
;  Instead is resumes execution based on the state of JumpBuffer.\r
;\r
;  @param  JumpBuffer    A pointer to CPU context buffer.\r
;  @param  Value         The value to return when the SetJump() context is restored.\r
;\r
;**/\r
;VOID\r
;EFIAPI\r
;InternalLongJump (\r
;  IN      BASE_LIBRARY_JUMP_BUFFER  *JumpBuffer,  // R0\r
;  IN      UINTN                     Value         // R1\r
;  );\r
;\r
InternalLongJump\r
  LDM   R0, {R3-R12,R14}\r
  MOV   R13, R3\r
  MOV   R0, R1\r
  BX    LR\r
\r
  END\r