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e1f414b6 | 1 | /** @file\r |
2 | Switch Stack functions.\r | |
3 | \r | |
24dcb5e5 | 4 | Copyright (c) 2006 - 2008, Intel Corporation<BR>\r |
e1f414b6 | 5 | All rights reserved. This program and the accompanying materials\r |
6 | are licensed and made available under the terms and conditions of the BSD License\r | |
7 | which accompanies this distribution. The full text of the license may be found at\r | |
8 | http://opensource.org/licenses/bsd-license.php\r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | \r | |
e1f414b6 | 13 | **/\r |
14 | \r | |
47fc17d8 | 15 | #include "BaseLibInternals.h"\r |
e1f414b6 | 16 | \r |
17 | /**\r | |
18 | Transfers control to a function starting with a new stack.\r | |
19 | \r | |
20 | Transfers control to the function specified by EntryPoint using the\r | |
21 | new stack specified by NewStack and passing in the parameters specified\r | |
22 | by Context1 and Context2. Context1 and Context2 are optional and may\r | |
23 | be NULL. The function EntryPoint must never return. This function\r | |
24 | supports a variable number of arguments following the NewStack parameter.\r | |
25 | These additional arguments are ignored on IA-32, x64, and EBC.\r | |
26 | IPF CPUs expect one additional parameter of type VOID * that specifies\r | |
27 | the new backing store pointer.\r | |
28 | \r | |
29 | If EntryPoint is NULL, then ASSERT().\r | |
30 | If NewStack is NULL, then ASSERT().\r | |
31 | \r | |
32 | @param EntryPoint A pointer to function to call with the new stack.\r | |
33 | @param Context1 A pointer to the context to pass into the EntryPoint\r | |
34 | function.\r | |
35 | @param Context2 A pointer to the context to pass into the EntryPoint\r | |
36 | function.\r | |
37 | @param NewStack A pointer to the new stack to use for the EntryPoint\r | |
38 | function.\r | |
285010e7 | 39 | @param ... This variable argument list is ignored for IA32, x64, and EBC. \r |
40 | For IPF, this variable argument list is expected to contain \r | |
41 | a single parameter of type VOID * that specifies the new backing \r | |
42 | store pointer.\r | |
e1f414b6 | 43 | \r |
2fc60b70 | 44 | \r |
e1f414b6 | 45 | **/\r |
46 | VOID\r | |
47 | EFIAPI\r | |
48 | SwitchStack (\r | |
49 | IN SWITCH_STACK_ENTRY_POINT EntryPoint,\r | |
50 | IN VOID *Context1, OPTIONAL\r | |
51 | IN VOID *Context2, OPTIONAL\r | |
52 | IN VOID *NewStack,\r | |
53 | ...\r | |
54 | )\r | |
55 | {\r | |
56 | VA_LIST Marker;\r | |
57 | \r | |
58 | ASSERT (EntryPoint != NULL);\r | |
59 | ASSERT (NewStack != NULL);\r | |
60 | \r | |
7f22d351 | 61 | //\r |
62 | // New stack must be aligned with CPU_STACK_ALIGNMENT\r | |
63 | //\r | |
64 | ASSERT (((UINTN)NewStack & (CPU_STACK_ALIGNMENT - 1)) == 0);\r | |
65 | \r | |
e1f414b6 | 66 | VA_START (Marker, NewStack);\r |
67 | \r | |
68 | InternalSwitchStack (EntryPoint, Context1, Context2, NewStack, Marker);\r | |
69 | \r | |
7f22d351 | 70 | VA_END (Marker);\r |
71 | \r | |
e1f414b6 | 72 | //\r |
73 | // InternalSwitchStack () will never return\r | |
74 | //\r | |
75 | ASSERT (FALSE);\r | |
76 | }\r |