sravan/system76-edk2
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1. Updated function headers in all assembly files.

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2. Split x86LowLevel.c into a bunch of C files to make images linked with BaseLib smaller.
3. Fixed a few minor bugs.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@1066 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
bxing
2006-07-21 08:47:38 +00:00
parent 31a9215c32
commit 3f566587ae
252 changed files with 1840 additions and 2009 deletions
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29
MdePkg/Library/BaseLib/Ia32/Thunk16.asm
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@@ -29,6 +29,10 @@ EXTERNDEF C m16Gdt:WORD
EXTERNDEF C m16GdtrBase:WORD
EXTERNDEF C mTransition:WORD
;
; Here is the layout of the real mode stack. _ToUserCode() is responsible for
; loading all these registers from real mode stack.
;
IA32_REGS STRUC 4t
_EDI DD ?
_ESI DD ?
@@ -50,6 +54,9 @@ IA32_REGS ENDS
.const
;
; These are global constant to convey information to C code.
;
m16Size DW InternalAsmThunk16 - m16Start
mThunk16Attr DW _ThunkAttr - m16Start
m16Gdt DW _NullSegDesc - m16Start
@@ -63,7 +70,10 @@ m16Start LABEL BYTE
SavedGdt LABEL FWORD
DW ?
DD ?
;------------------------------------------------------------------------------
; _BackFromUserCode() takes control in real mode after 'retf' has been executed
; by user code. It will be shadowed to somewhere in memory below 1MB.
;------------------------------------------------------------------------------
_BackFromUserCode PROC
push ss
push cs
@@ -122,6 +132,10 @@ _16Gdtr LABEL FWORD
DW GdtEnd - _NullSegDesc - 1
_16GdtrBase DD _NullSegDesc
;------------------------------------------------------------------------------
; _ToUserCode() takes control in real mode before passing control to user code.
; It will be shadowed to somewhere in memory below 1MB.
;------------------------------------------------------------------------------
_ToUserCode PROC
mov edx, ss
mov ss, ecx ; set new segment selectors
@@ -174,11 +188,14 @@ _16DsDesc LABEL QWORD
DB 0
GdtEnd LABEL QWORD
;
; @param RegSet Pointer to a IA32_DWORD_REGS structure
; @param Transition Pointer to the transition code
; @return The address of the 16-bit stack after returning from user code
;
;------------------------------------------------------------------------------
; IA32_REGISTER_SET *
; EFIAPI
; InternalAsmThunk16 (
; IN IA32_REGISTER_SET *RegisterSet,
; IN OUT VOID *Transition
; );
;------------------------------------------------------------------------------
InternalAsmThunk16 PROC USES ebp ebx esi edi ds es fs gs
mov esi, [esp + 36] ; esi <- RegSet
movzx edx, (IA32_REGS ptr [esi])._SS