diff options
author | Guo Mang <mang.guo@intel.com> | 2016-12-22 15:57:14 +0800 |
---|---|---|
committer | Guo Mang <mang.guo@intel.com> | 2016-12-26 19:14:41 +0800 |
commit | 1760cf81e4b1847c6823ea3514a78dd120e19b6e (patch) | |
tree | 64a874b14050fe24d3bbc1bc13cd293abf8ae018 /Core/MdePkg/Library/BaseLib/Ia32/LongJump.c | |
parent | 7f05fa00f73038b425002566d3afe6c3ade2ccdb (diff) | |
download | edk2-platforms-1760cf81e4b1847c6823ea3514a78dd120e19b6e.tar.xz |
MdePkg: Move to new location
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Guo Mang <mang.guo@intel.com>
Diffstat (limited to 'Core/MdePkg/Library/BaseLib/Ia32/LongJump.c')
-rw-r--r-- | Core/MdePkg/Library/BaseLib/Ia32/LongJump.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/Core/MdePkg/Library/BaseLib/Ia32/LongJump.c b/Core/MdePkg/Library/BaseLib/Ia32/LongJump.c new file mode 100644 index 0000000000..73973a9cce --- /dev/null +++ b/Core/MdePkg/Library/BaseLib/Ia32/LongJump.c @@ -0,0 +1,50 @@ +/** @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]
+ }
+}
+
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