mirror of https://github.com/acidanthera/audk.git
75 lines
2.0 KiB
C
75 lines
2.0 KiB
C
/** @file
|
|
Implementation of SetJump() 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"
|
|
|
|
/**
|
|
Worker function that checks ASSERT condition for JumpBuffer
|
|
|
|
Checks ASSERT condition for JumpBuffer.
|
|
|
|
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.
|
|
|
|
**/
|
|
VOID
|
|
EFIAPI
|
|
InternalAssertJumpBuffer (
|
|
IN BASE_LIBRARY_JUMP_BUFFER *JumpBuffer
|
|
);
|
|
|
|
/**
|
|
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.
|
|
|
|
@retval 0 Indicates a return from SetJump().
|
|
|
|
**/
|
|
_declspec (naked)
|
|
UINTN
|
|
EFIAPI
|
|
SetJump (
|
|
OUT BASE_LIBRARY_JUMP_BUFFER *JumpBuffer
|
|
)
|
|
{
|
|
_asm {
|
|
push [esp + 4]
|
|
call InternalAssertJumpBuffer
|
|
pop ecx
|
|
pop ecx
|
|
mov edx, [esp]
|
|
mov [edx], ebx
|
|
mov [edx + 4], esi
|
|
mov [edx + 8], edi
|
|
mov [edx + 12], ebp
|
|
mov [edx + 16], esp
|
|
mov [edx + 20], ecx
|
|
xor eax, eax
|
|
jmp ecx
|
|
}
|
|
}
|
|
|