1 #------------------------------------------------------------------------------
3 # Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
4 # This program and the accompanying materials
5 # are licensed and made available under the terms and conditions of the BSD License
6 # which accompanies this distribution. The full text of the license may be found at
7 # http://opensource.org/licenses/bsd-license.php.
9 # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
10 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
18 #------------------------------------------------------------------------------
21 #------------------------------------------------------------------------------
22 # Routine Description:
24 # Routine for switching stacks with 2 parameters
28 # (rcx) EntryPoint - Entry point with new stack.
29 # (rdx) Context1 - Parameter1 for entry point.
30 # (r8) Context2 - Parameter2 for entry point.
31 # (r9) NewStack - The pointer to new stack.
37 #------------------------------------------------------------------------------
38 ASM_GLOBAL ASM_PFX(InternalSwitchStack)
39 ASM_PFX(InternalSwitchStack):
43 mov %rcx, %rax // Shift registers for new call
47 # Reserve space for register parameters (rcx, rdx, r8 & r9) on the stack,
48 # in case the callee wishes to spill them.
51 pushq $0 // stop gdb stack unwind
52 jmp *%rax // call EntryPoint ()