Changeset 55107 in vbox for trunk/src/VBox/Runtime/common/asm

Timestamp:

Apr 6, 2015 11:34:45 PM (10 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

99402

Message:

asm-amd64-x86.h: Added ASMGetXcr0 & ASMSetXcr0.

Location:

trunk/src/VBox/Runtime/common/asm

Files:

• ASMGetXcr0.asm (copied) (copied from trunk/src/VBox/Runtime/common/asm/ASMGetGDTR.asm ) (2 diffs)
• ASMSetXcr0.asm (copied) (copied from trunk/src/VBox/Runtime/common/asm/ASMSetGDTR.asm ) (2 diffs)

trunk/src/VBox/Runtime/common/asm/ASMGetXcr0.asm

@@ -1 +1 @@
 ; $Id$
 ;; @file
-; IPRT - ASMGetGDTR().
+; IPRT - ASMGetXcr0().
 ;
 
 ;
-; Copyright (C) 2006-2013 Oracle Corporation
+; Copyright (C) 2006-2015 Oracle Corporation
 ;
 ; This file is part of VirtualBox Open Source Edition (OSE), as
@@ -33 +33 @@
 
 ;;
-; Gets the content of the GDTR CPU register.
-; @param   pGdtr    Where to store the GDTR contents.
-;                   msc=rcx, gcc=rdi, x86=[esp+4]
+; Gets the content of the XCR0 CPU register.
+; @returns XCR0 value in rax (amd64) / edx:eax (x86).
 ;
-BEGINPROC_EXPORTED ASMGetGDTR
-%ifdef ASM_CALL64_MSC
-        mov     rax, rcx
-%elifdef ASM_CALL64_GCC
-        mov     rax, rdi
-%elifdef RT_ARCH_X86
-        mov     eax, [esp + 4]
-%else
- %error "Undefined arch?"
+BEGINPROC_EXPORTED ASMGetXcr0
+        xor     ecx, ecx                ; XCR0
+        xgetbv
+%ifdef RT_ARCH_AMD64
+        shl     rdx, 32
+        or      rax, rdx
 %endif
-        sgdt    [xAX]
         ret
-ENDPROC ASMGetGDTR
+ENDPROC ASMGetXcr0
 

trunk/src/VBox/Runtime/common/asm/ASMSetXcr0.asm

@@ -1 +1 @@
 ; $Id$
 ;; @file
-; IPRT - ASMSetGDTR().
+; IPRT - ASMSetXcr0().
 ;
 
 ;
-; Copyright (C) 2006-2014 Oracle Corporation
+; Copyright (C) 2006-2015 Oracle Corporation
 ;
 ; This file is part of VirtualBox Open Source Edition (OSE), as
@@ -33 +33 @@
 
 ;;
-; Sets the content of the GDTR CPU register.
-; @param   pGdtr    Where to load the GDTR contents from.
+; Sets the content of the Xcr0 CPU register.
+; @param   uXcr0    The new XCR0 content.
 ;                   msc=rcx, gcc=rdi, x86=[esp+4]
 ;
-BEGINPROC_EXPORTED ASMSetGDTR
+BEGINPROC_EXPORTED ASMSetXcr0
 %ifdef ASM_CALL64_MSC
-        mov     rax, rcx
+        mov     rdx, rcx
+        shr     rdx, 32
+        mov     eax, ecx
 %elifdef ASM_CALL64_GCC
-        mov     rax, rdi
+        mov     rdx, rdi
+        shr     rdx, 32
+        mov     eax, edi
 %elifdef RT_ARCH_X86
         mov     eax, [esp + 4]
+        mov     edx, [esp + 8]
 %else
  %error "Undefined arch?"
 %endif
-        lgdt    [xAX]
+        xor     ecx, ecx
+        xsetbv
         ret
-ENDPROC ASMSetGDTR
+ENDPROC ASMSetXcr0