audk/MdePkg/Library/BaseLib/Arm/SetJumpLongJump.S
Michael D Kinney 9344f09215 MdePkg: Replace BSD License with BSD+Patent License
https://bugzilla.tianocore.org/show_bug.cgi?id=1373

Replace BSD 2-Clause License with BSD+Patent License.  This change is
based on the following emails:

  https://lists.01.org/pipermail/edk2-devel/2019-February/036260.html
  https://lists.01.org/pipermail/edk2-devel/2018-October/030385.html

RFCs with detailed process for the license change:

  V3: https://lists.01.org/pipermail/edk2-devel/2019-March/038116.html
  V2: https://lists.01.org/pipermail/edk2-devel/2019-March/037669.html
  V1: https://lists.01.org/pipermail/edk2-devel/2019-March/037500.html

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
2019-04-09 10:58:13 -07:00

65 lines
1.9 KiB
ArmAsm

#------------------------------------------------------------------------------
#
# Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
# Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
# SPDX-License-Identifier: BSD-2-Clause-Patent
#
#------------------------------------------------------------------------------
.text
.p2align 2
GCC_ASM_EXPORT(SetJump)
GCC_ASM_EXPORT(InternalLongJump)
#/**
# Saves the current CPU context that can be restored with a call to LongJump() and returns 0.#
#
# Saves the current CPU context in the buffer specified by JumpBuffer and returns 0. The initial
# call to SetJump() must always return 0. Subsequent calls to LongJump() cause a non-zero
# value to be returned by SetJump().
#
# If JumpBuffer is NULL, then ASSERT().
# For IPF CPUs, if JumpBuffer is not aligned on a 16-byte boundary, then ASSERT().
#
# @param JumpBuffer A pointer to CPU context buffer.
#
#**/
#
#UINTN
#EFIAPI
#SetJump (
# IN BASE_LIBRARY_JUMP_BUFFER *JumpBuffer // R0
# );
#
ASM_PFX(SetJump):
mov r3, r13
stmia r0, {r3-r12,r14}
eor r0, r0, r0
bx lr
#/**
# Restores the CPU context that was saved with SetJump().#
#
# Restores the CPU context from the buffer specified by JumpBuffer.
# This function never returns to the caller.
# Instead is resumes execution based on the state of JumpBuffer.
#
# @param JumpBuffer A pointer to CPU context buffer.
# @param Value The value to return when the SetJump() context is restored.
#
#**/
#VOID
#EFIAPI
#InternalLongJump (
# IN BASE_LIBRARY_JUMP_BUFFER *JumpBuffer, // R0
# IN UINTN Value // R1
# );
#
ASM_PFX(InternalLongJump):
ldmia r0, {r3-r12,r14}
mov r13, r3
mov r0, r1
bx lr
ASM_FUNCTION_REMOVE_IF_UNREFERENCED