diff options
Diffstat (limited to 'MdePkg/Library/BaseLib/X64')
| -rw-r--r-- | MdePkg/Library/BaseLib/X64/DisablePaging64.S | 28 |
1 files changed, 14 insertions, 14 deletions
diff --git a/MdePkg/Library/BaseLib/X64/DisablePaging64.S b/MdePkg/Library/BaseLib/X64/DisablePaging64.S index 41d6a6f5d7..017d6ce945 100644 --- a/MdePkg/Library/BaseLib/X64/DisablePaging64.S +++ b/MdePkg/Library/BaseLib/X64/DisablePaging64.S @@ -1,6 +1,6 @@ #------------------------------------------------------------------------------
#
-# Copyright (c) 2006 - 2008, Intel Corporation
+# Copyright (c) 2006 - 2009, Intel Corporation
# All rights reserved. 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
@@ -37,18 +37,18 @@ ASM_GLOBAL ASM_PFX(InternalX86DisablePaging64)
ASM_PFX(InternalX86DisablePaging64):
- cli - lea L1(%rip), %rsi # rsi <- The start address of transition code - mov 0x28(%rsp), %edi # rdi <- New stack - sub $64, %edi # rdi <- use 64 byte in stack to hold transition code - mov %edi, %r10d # r10 <- The start address of transicition code below 4G - lea _mTransitionEnd(%rip), %rax # rax <- end of transition code - sub %rsi, %rax # rax <- The size of transition piece code - push %rcx # save rcx to stack - mov %rax, %rcx # rcx <- The size of transition piece code - rep - movsb # copy transition code to (new stack - 64byte) below 4G - pop %rcx # restore rcx + cli
+ lea L1(%rip), %rsi # rsi <- The start address of transition code
+ mov 0x28(%rsp), %edi # rdi <- New stack
+ sub $64, %edi # rdi <- use 64 byte in stack to hold transition code
+ mov %edi, %r10d # r10 <- The start address of transicition code below 4G
+ lea _mTransitionEnd(%rip), %rax # rax <- end of transition code
+ sub %rsi, %rax # rax <- The size of transition piece code
+ push %rcx # save rcx to stack
+ mov %rax, %rcx # rcx <- The size of transition piece code
+ rep
+ movsb # copy transition code to (new stack - 64byte) below 4G
+ pop %rcx # restore rcx
mov %r8d, %esi
mov %r9d, %edi
@@ -75,4 +75,4 @@ L1: push %rsi # push Context1
callq *%rbx # transfer control to EntryPoint
jmp . # no one should get here
-
_mTransitionEnd : +
_mTransitionEnd :
|