diff options
Diffstat (limited to 'MdePkg')
| -rw-r--r-- | MdePkg/Library/BaseLib/BaseLib.inf | 3 | ||||
| -rw-r--r-- | MdePkg/Library/BaseLib/Ia32/InternalSwitchStack.nasm | 47 |
2 files changed, 49 insertions, 1 deletions
diff --git a/MdePkg/Library/BaseLib/BaseLib.inf b/MdePkg/Library/BaseLib/BaseLib.inf index 46a8c86172..1ffe870e7e 100644 --- a/MdePkg/Library/BaseLib/BaseLib.inf +++ b/MdePkg/Library/BaseLib/BaseLib.inf @@ -1,7 +1,7 @@ ## @file
# Base Library implementation.
#
-# Copyright (c) 2007 - 2015, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2007 - 2016, Intel Corporation. All rights reserved.<BR>
# Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
# Portions copyright (c) 2011 - 2013, ARM Ltd. All rights reserved.<BR>
#
@@ -410,6 +410,7 @@ Ia32/InternalSwitchStack.c | MSFT
Ia32/InternalSwitchStack.c | INTEL
Ia32/InternalSwitchStack.S | GCC
+ Ia32/InternalSwitchStack.nasm | GCC
Ia32/Non-existing.c
Unaligned.c
X86WriteIdtr.c
diff --git a/MdePkg/Library/BaseLib/Ia32/InternalSwitchStack.nasm b/MdePkg/Library/BaseLib/Ia32/InternalSwitchStack.nasm new file mode 100644 index 0000000000..3da341cbb2 --- /dev/null +++ b/MdePkg/Library/BaseLib/Ia32/InternalSwitchStack.nasm @@ -0,0 +1,47 @@ +;------------------------------------------------------------------------------
+;
+; Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
+; Portions copyright (c) 2011, Apple Inc. 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.
+;
+; Module Name:
+;
+; InternalSwitchStack.nasm
+;
+; Abstract:
+;
+; Implementation of a stack switch on IA-32.
+;
+;------------------------------------------------------------------------------
+
+ SECTION .text
+
+;------------------------------------------------------------------------------
+; VOID
+; EFIAPI
+; InternalSwitchStack (
+; IN SWITCH_STACK_ENTRY_POINT EntryPoint,
+; IN VOID *Context1, OPTIONAL
+; IN VOID *Context2, OPTIONAL
+; IN VOID *NewStack
+; );
+;------------------------------------------------------------------------------
+global ASM_PFX(InternalSwitchStack)
+ASM_PFX(InternalSwitchStack):
+ push ebp
+ mov ebp, esp
+
+ mov esp, [ebp + 20] ; switch stack
+ sub esp, 8
+ mov eax, [ebp + 16]
+ mov [esp + 4], eax
+ mov eax, [ebp + 12]
+ mov [esp], eax
+ push 0 ; keeps gdb from unwinding stack
+ jmp dword [ebp + 8] ; call and never return
|