/** @file | |
Implementation of _LongJump() on IA-32. | |
Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR> | |
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. | |
**/ | |
#include "BaseLibInternals.h" | |
/** | |
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. | |
**/ | |
__declspec (naked) | |
VOID | |
EFIAPI | |
InternalLongJump ( | |
IN BASE_LIBRARY_JUMP_BUFFER *JumpBuffer, | |
IN UINTN Value | |
) | |
{ | |
_asm { | |
pop eax ; skip return address | |
pop edx ; edx <- JumpBuffer | |
pop eax ; eax <- Value | |
mov ebx, [edx] | |
mov esi, [edx + 4] | |
mov edi, [edx + 8] | |
mov ebp, [edx + 12] | |
mov esp, [edx + 16] | |
jmp dword ptr [edx + 20] | |
} | |
} | |