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71 lines
2.1 KiB
71 lines
2.1 KiB
4 years ago
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;------------------------------------------------------------------------------
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;
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; Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
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; Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
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; This program and the accompanying materials
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; are licensed and made available under the terms and conditions of the BSD License
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; which accompanies this distribution. The full text of the license may be found at
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; http://opensource.org/licenses/bsd-license.php.
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;
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; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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;
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;------------------------------------------------------------------------------
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EXPORT SetJump
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EXPORT InternalLongJump
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AREA BaseLib, CODE, READONLY
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;/**
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; Saves the current CPU context that can be restored with a call to LongJump() and returns 0.;
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;
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; Saves the current CPU context in the buffer specified by JumpBuffer and returns 0. The initial
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; call to SetJump() must always return 0. Subsequent calls to LongJump() cause a non-zero
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; value to be returned by SetJump().
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;
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; If JumpBuffer is NULL, then ASSERT().
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; For IPF CPUs, if JumpBuffer is not aligned on a 16-byte boundary, then ASSERT().
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;
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; @param JumpBuffer A pointer to CPU context buffer.
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;
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;**/
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;
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;UINTN
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;EFIAPI
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;SetJump (
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; IN BASE_LIBRARY_JUMP_BUFFER *JumpBuffer // R0
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; )
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;
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SetJump
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MOV R3, R13
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STM R0, {R3-R12,R14}
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EOR R0, R0
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BX LR
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;/**
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; Restores the CPU context that was saved with SetJump().;
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;
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; Restores the CPU context from the buffer specified by JumpBuffer.
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; This function never returns to the caller.
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; Instead is resumes execution based on the state of JumpBuffer.
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;
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; @param JumpBuffer A pointer to CPU context buffer.
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; @param Value The value to return when the SetJump() context is restored.
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;
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;**/
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;VOID
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;EFIAPI
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;InternalLongJump (
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; IN BASE_LIBRARY_JUMP_BUFFER *JumpBuffer, // R0
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; IN UINTN Value // R1
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; );
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;
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InternalLongJump
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LDM R0, {R3-R12,R14}
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MOV R13, R3
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MOV R0, R1
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BX LR
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END
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