|
@@ -1,78 +0,0 @@
|
|
|
-#------------------------------------------------------------------------------
|
|
|
-#
|
|
|
-# Copyright (c) 2013, Intel Corporation. All rights reserved.<BR>
|
|
|
-# This program and the accompanying materials
|
|
|
-# are licensed and made available under the terms and conditions of the BSD License
|
|
|
-# which accompanies this distribution. The full text of the license may be found at
|
|
|
-# http://opensource.org/licenses/bsd-license.php.
|
|
|
-#
|
|
|
-# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
|
|
|
-# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
|
|
|
-#
|
|
|
-# Abstract:
|
|
|
-#
|
|
|
-# Switch the stack from temporary memory to permanent memory.
|
|
|
-#
|
|
|
-#------------------------------------------------------------------------------
|
|
|
-
|
|
|
-
|
|
|
-#------------------------------------------------------------------------------
|
|
|
-# VOID
|
|
|
-# EFIAPI
|
|
|
-# SecSwitchStack (
|
|
|
-# UINT32 TemporaryMemoryBase,
|
|
|
-# UINT32 PermenentMemoryBase
|
|
|
-# )#
|
|
|
-#------------------------------------------------------------------------------
|
|
|
-ASM_GLOBAL ASM_PFX (SecSwitchStack)
|
|
|
-ASM_PFX(SecSwitchStack):
|
|
|
- #
|
|
|
- # Save standard registers so they can be used to change stack
|
|
|
- #
|
|
|
- pushl %eax
|
|
|
- pushl %ebx
|
|
|
- pushl %ecx
|
|
|
- pushl %edx
|
|
|
-
|
|
|
- #
|
|
|
- # !!CAUTION!! this function address's is pushed into stack after
|
|
|
- # migration of whole temporary memory, so need save it to permanent
|
|
|
- # memory at first!
|
|
|
- #
|
|
|
- movl 20(%esp), %ebx # Save the first parameter
|
|
|
- movl 24(%esp), %ecx # Save the second parameter
|
|
|
-
|
|
|
- #
|
|
|
- # Save this function's return address into permanent memory at first.
|
|
|
- # Then, Fixup the esp point to permanent memory
|
|
|
- #
|
|
|
- movl %esp, %eax
|
|
|
- subl %ebx, %eax
|
|
|
- addl %ecx, %eax
|
|
|
- movl 0(%esp), %edx # copy pushed register's value to permanent memory
|
|
|
- movl %edx, 0(%eax)
|
|
|
- movl 4(%esp), %edx
|
|
|
- movl %edx, 4(%eax)
|
|
|
- movl 8(%esp), %edx
|
|
|
- movl %edx, 8(%eax)
|
|
|
- movl 12(%esp), %edx
|
|
|
- movl %edx, 12(%eax)
|
|
|
- movl 16(%esp), %edx # Update this function's return address into permanent memory
|
|
|
- movl %edx, 16(%eax)
|
|
|
- movl %eax, %esp # From now, esp is pointed to permanent memory
|
|
|
-
|
|
|
- #
|
|
|
- # Fixup the ebp point to permanent memory
|
|
|
- #
|
|
|
- movl %ebp, %eax
|
|
|
- subl %ebx, %eax
|
|
|
- addl %ecx, %eax
|
|
|
- movl %eax, %ebp # From now, ebp is pointed to permanent memory
|
|
|
-
|
|
|
- popl %edx
|
|
|
- popl %ecx
|
|
|
- popl %ebx
|
|
|
- popl %eax
|
|
|
- ret
|
|
|
-
|
|
|
-
|