diff options
Diffstat (limited to 'MdePkg/Library/BaseLib/Arm/SetJumpLongJump.S')
| -rw-r--r-- | MdePkg/Library/BaseLib/Arm/SetJumpLongJump.S | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseLib/Arm/SetJumpLongJump.S b/MdePkg/Library/BaseLib/Arm/SetJumpLongJump.S new file mode 100644 index 0000000000..d79ad2e84b --- /dev/null +++ b/MdePkg/Library/BaseLib/Arm/SetJumpLongJump.S @@ -0,0 +1,70 @@ +#------------------------------------------------------------------------------ +# +# Copyright (c) 2006 - 2009, Intel Corporation<BR> +# Portions copyright (c) 2008-2009 Apple Inc.<BR> +# All rights reserved. This program and the accompanying materials +# are licensed and made available under the terms and conditions of the BSD License +# which accompanies this distribution. The full text of the license may be found at +# http://opensource.org/licenses/bsd-license.php +# +# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, +# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. +# +#------------------------------------------------------------------------------ +.text +.p2align 2 + +.globl ASM_PFX(SetJump) +.globl ASM_PFX(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() |