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b1ff428c | 1 | #------------------------------------------------------------------------------\r |
2 | #\r | |
bb817c56 HT |
3 | # Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>\r |
4 | # This program and the accompanying materials\r | |
b1ff428c | 5 | # are licensed and made available under the terms and conditions of the BSD License\r |
6 | # which accompanies this distribution. The full text of the license may be found at\r | |
2fc59a00 | 7 | # http://opensource.org/licenses/bsd-license.php.\r |
b1ff428c | 8 | #\r |
9 | # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
10 | # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
11 | #\r | |
12 | # Module Name:\r | |
13 | #\r | |
14 | # SwitchStack.S\r | |
15 | #\r | |
16 | # Abstract:\r | |
17 | #\r | |
18 | #------------------------------------------------------------------------------\r | |
19 | \r | |
20 | \r | |
21 | #------------------------------------------------------------------------------\r | |
22 | # Routine Description:\r | |
23 | #\r | |
24 | # Routine for switching stacks with 2 parameters\r | |
25 | #\r | |
26 | # Arguments:\r | |
27 | #\r | |
28 | # (rcx) EntryPoint - Entry point with new stack.\r | |
29 | # (rdx) Context1 - Parameter1 for entry point.\r | |
30 | # (r8) Context2 - Parameter2 for entry point.\r | |
2fc59a00 | 31 | # (r9) NewStack - The pointer to new stack.\r |
b1ff428c | 32 | #\r |
33 | # Returns:\r | |
34 | #\r | |
35 | # None\r | |
36 | #\r | |
37 | #------------------------------------------------------------------------------\r | |
d5172f91 | 38 | ASM_GLOBAL ASM_PFX(InternalSwitchStack)\r |
b1ff428c | 39 | ASM_PFX(InternalSwitchStack):\r |
bab427db | 40 | pushq %rbp \r |
41 | movq %rsp, %rbp\r | |
42 | \r | |
43 | mov %rcx, %rax // Shift registers for new call\r | |
b1ff428c | 44 | mov %rdx, %rcx\r |
45 | mov %r8, %rdx\r | |
46 | #\r | |
47 | # Reserve space for register parameters (rcx, rdx, r8 & r9) on the stack,\r | |
48 | # in case the callee wishes to spill them.\r | |
49 | #\r | |
50 | lea -0x20(%r9), %rsp\r | |
bab427db | 51 | pushq $0 // stop gdb stack unwind\r |
52 | jmp *%rax // call EntryPoint ()\r |