diff options
| -rw-r--r-- | MdePkg/Library/BaseLib/X64/DisablePaging64.S | 5 | ||||
| -rw-r--r-- | MdePkg/Library/BaseLib/X64/DisablePaging64.asm | 2 |
2 files changed, 4 insertions, 3 deletions
diff --git a/MdePkg/Library/BaseLib/X64/DisablePaging64.S b/MdePkg/Library/BaseLib/X64/DisablePaging64.S index a467fea260..ce9e9de533 100644 --- a/MdePkg/Library/BaseLib/X64/DisablePaging64.S +++ b/MdePkg/Library/BaseLib/X64/DisablePaging64.S @@ -43,7 +43,7 @@ ASM_PFX(InternalX86DisablePaging64): lea _mTransitionEnd(%rip), %rax # rax <- end of transition code
sub %rsi, %rax # rax <- The size of transition piece code
add $4, %rax # round rax up to the next 4 byte boundary
- and $0x0fffffffc, %rax
+ and $0xfc, %al
sub %rax, %rdi # rdi <- use stack to hold transition code
mov %edi, %r10d # r10 <- The start address of transicition code below 4G
push %rcx # save rcx to stack
@@ -78,4 +78,5 @@ L1: push %rsi # push Context1
callq *%rbx # transfer control to EntryPoint
jmp . # no one should get here
-
_mTransitionEnd :
+
+_mTransitionEnd :
diff --git a/MdePkg/Library/BaseLib/X64/DisablePaging64.asm b/MdePkg/Library/BaseLib/X64/DisablePaging64.asm index 5f556a4ca6..4897028054 100644 --- a/MdePkg/Library/BaseLib/X64/DisablePaging64.asm +++ b/MdePkg/Library/BaseLib/X64/DisablePaging64.asm @@ -41,7 +41,7 @@ InternalX86DisablePaging64 PROC lea rax, mTransitionEnd ; rax <- end of transition code
sub rax, rsi ; rax <- The size of transition piece code
add rax, 4 ; Round RAX up to the next 4 byte boundary
- and rax, 0fffffffch
+ and al, 0fch
sub rdi, rax ; rdi <- Use stack to hold transition code
mov r10d, edi ; r10 <- The start address of transicition code below 4G
push rcx ; save rcx to stack
|