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1 | /** @file\r |
2 | Switch Stack functions.\r |
3 | \r |
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4 | Copyright (c) 2006 - 2007, Intel Corporation<BR>\r |
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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 |
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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 |
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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 |
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47 | IN VOID *Context1, OPTIONAL\r |
48 | IN VOID *Context2, OPTIONAL\r |
49 | IN VOID *NewStack,\r |
50 | ...\r |
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51 | )\r |
52 | {\r |
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53 | VA_LIST Marker;\r |
54 | \r |
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55 | ASSERT (EntryPoint != NULL && NewStack != NULL);\r |
56 | \r |
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57 | VA_START (Marker, NewStack);\r |
58 | \r |
59 | InternalSwitchStack (EntryPoint, Context1, Context2, NewStack, Marker);\r |
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60 | \r |
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61 | VA_END (Marker);\r |
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62 | }\r |