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7d7c2b46 | 1 | /** @file\r |
2 | Switch Stack functions.\r | |
3 | \r | |
cb41bea7 | 4 | Copyright (c) 2006 - 2007, Intel Corporation<BR>\r |
7d7c2b46 | 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 | |
13 | Module Name: SwitchStack.c\r | |
14 | \r | |
15 | **/\r | |
16 | \r | |
17 | #include <BaseLibInternals.h>\r | |
18 | \r | |
19 | /**\r | |
20 | Transfers control to a function starting with a new stack.\r | |
21 | \r | |
cb41bea7 | 22 | Transfers control to the function specified by EntryPoint using the\r |
23 | new stack specified by NewStack and passing in the parameters specified\r | |
24 | by Context1 and Context2. Context1 and Context2 are optional and may\r | |
25 | be NULL. The function EntryPoint must never return. This function\r | |
26 | supports a variable number of arguments following the NewStack parameter.\r | |
27 | These additional arguments are ignored on IA-32, x64, and EBC.\r | |
28 | IPF CPUs expect one additional parameter of type VOID * that specifies\r | |
29 | the new backing store pointer.\r | |
7d7c2b46 | 30 | \r |
31 | If EntryPoint is NULL, then ASSERT().\r | |
32 | If NewStack is NULL, then ASSERT().\r | |
33 | \r | |
34 | @param EntryPoint A pointer to function to call with the new stack.\r | |
35 | @param Context1 A pointer to the context to pass into the EntryPoint\r | |
36 | function.\r | |
37 | @param Context2 A pointer to the context to pass into the EntryPoint\r | |
38 | function.\r | |
39 | @param NewStack A pointer to the new stack to use for the EntryPoint\r | |
40 | function.\r | |
41 | \r | |
42 | **/\r | |
43 | VOID\r | |
44 | EFIAPI\r | |
45 | SwitchStack (\r | |
46 | IN SWITCH_STACK_ENTRY_POINT EntryPoint,\r | |
cb41bea7 | 47 | IN VOID *Context1, OPTIONAL\r |
48 | IN VOID *Context2, OPTIONAL\r | |
49 | IN VOID *NewStack,\r | |
50 | ...\r | |
7d7c2b46 | 51 | )\r |
52 | {\r | |
cb41bea7 | 53 | VA_LIST Marker;\r |
54 | \r | |
c75bbd0e | 55 | ASSERT (EntryPoint != NULL);\r |
56 | ASSERT (NewStack != NULL);\r | |
7d7c2b46 | 57 | \r |
cb41bea7 | 58 | VA_START (Marker, NewStack);\r |
59 | \r | |
60 | InternalSwitchStack (EntryPoint, Context1, Context2, NewStack, Marker);\r | |
4cbd2175 | 61 | \r |
0f6b6f75 | 62 | //\r |
63 | // InternalSwitchStack () will never return\r | |
64 | //\r | |
65 | ASSERT (FALSE);\r | |
7d7c2b46 | 66 | }\r |