1 /** @file
2 SwitchStack() function for ARM.
3
4 Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
5 Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
6 This program and the accompanying materials
7 are licensed and made available under the terms and conditions of the BSD License
8 which accompanies this distribution. The full text of the license may be found at
9 http://opensource.org/licenses/bsd-license.php.
10
11 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
12 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
13
14 **/
15
16 #include "BaseLibInternals.h"
17
18 /**
19 Transfers control to a function starting with a new stack.
20
21 This internal worker function transfers control to the function
22 specified by EntryPoint using the new stack specified by NewStack,
23 and passes in the parameters specified by Context1 and Context2.
24 Context1 and Context2 are optional and may be NULL.
25 The function EntryPoint must never return.
26
27 @param EntryPoint The pointer to the function to enter.
28 @param Context1 The first parameter to pass in.
29 @param Context2 The second Parameter to pass in
30 @param NewStack The new Location of the stack
31
32 **/
33 VOID
34 EFIAPI
35 InternalSwitchStackAsm (
36 IN SWITCH_STACK_ENTRY_POINT EntryPoint,
37 IN VOID *Context1, OPTIONAL
38 IN VOID *Context2, OPTIONAL
39 IN VOID *NewStack
40 );
41
42
43 /**
44 Transfers control to a function starting with a new stack.
45
46 Transfers control to the function specified by EntryPoint using the
47 new stack specified by NewStack, and passes in the parameters specified
48 by Context1 and Context2. Context1 and Context2 are optional and may
49 be NULL. The function EntryPoint must never return.
50 Marker will be ignored on IA-32, x64, and EBC.
51 IPF CPUs expect one additional parameter of type VOID * that specifies
52 the new backing store pointer.
53
54 If EntryPoint is NULL, then ASSERT().
55 If NewStack is NULL, then ASSERT().
56
57 @param EntryPoint A pointer to function to call with the new stack.
58 @param Context1 A pointer to the context to pass into the EntryPoint
59 function.
60 @param Context2 A pointer to the context to pass into the EntryPoint
61 function.
62 @param NewStack A pointer to the new stack to use for the EntryPoint
63 function.
64 @param Marker A VA_LIST marker for the variable argument list.
65
66 **/
67 VOID
68 EFIAPI
InternalSwitchStack(IN SWITCH_STACK_ENTRY_POINT EntryPoint,IN VOID * Context1,OPTIONAL IN VOID * Context2,OPTIONAL IN VOID * NewStack,IN VA_LIST Marker)69 InternalSwitchStack (
70 IN SWITCH_STACK_ENTRY_POINT EntryPoint,
71 IN VOID *Context1, OPTIONAL
72 IN VOID *Context2, OPTIONAL
73 IN VOID *NewStack,
74 IN VA_LIST Marker
75 )
76
77 {
78 InternalSwitchStackAsm (EntryPoint, Context1, Context2, NewStack);
79 }
80