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- We do not speak about the v86 hack.

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- This should fix the V86 GPF error.

svn path=/trunk/; revision=23700
This commit is contained in:
Alex Ionescu 2006-08-25 02:23:47 +00:00
parent b23894894d
commit 38a0558e07
3 changed files with 20 additions and 0 deletions
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2
reactos/ntoskrnl/include/internal/i386/ke.h
View file

@ -44,6 +44,8 @@
#define FRAME_EDITED 0xFFF8 #define FRAME_EDITED 0xFFF8
#define WE_DO_NOT_SPEAK_ABOUT_THE_V86_HACK 1
#ifndef __ASM__ #ifndef __ASM__
extern ULONG Ke386CacheAlignment; extern ULONG Ke386CacheAlignment;

10
reactos/ntoskrnl/ke/i386/ctxswitch.S
View file

@ -299,6 +299,11 @@ BadThread:
/* Save the Exception list */ /* Save the Exception list */
push [ebx+KPCR_EXCEPTION_LIST] push [ebx+KPCR_EXCEPTION_LIST]
#if WE_DO_NOT_SPEAK_ABOUT_THE_V86_HACK // V86 HACK
mov ecx, [ebx+KPCR_TSS]
push [ecx+KTSS_ESP0]
#endif
/* DPC shouldn't be active */ /* DPC shouldn't be active */
cmp byte ptr [ebx+KPCR_PRCB_DPC_ROUTINE_ACTIVE], 0 cmp byte ptr [ebx+KPCR_PRCB_DPC_ROUTINE_ACTIVE], 0
jnz BugCheckDpc jnz BugCheckDpc
@ -393,6 +398,11 @@ SameProcess:
inc dword ptr [esi+KTHREAD_CONTEXT_SWITCHES] inc dword ptr [esi+KTHREAD_CONTEXT_SWITCHES]
//inc dword ptr [esi+KPRC_PRCB_CONTEXT_SWITCHES] //inc dword ptr [esi+KPRC_PRCB_CONTEXT_SWITCHES]
#if WE_DO_NOT_SPEAK_ABOUT_THE_V86_HACK
mov ebp, [ebx+KPCR_TSS]
pop [ebp+KTSS_ESP0]
#endif
/* Restore exception list */ /* Restore exception list */
pop [ebx+KPCR_EXCEPTION_LIST] pop [ebx+KPCR_EXCEPTION_LIST]

8
reactos/ntoskrnl/ke/i386/thread.c
View file

@ -14,6 +14,9 @@
typedef struct _KSHARED_CTXSWITCH_FRAME typedef struct _KSHARED_CTXSWITCH_FRAME
{ {
#if WE_DO_NOT_SPEAK_ABOUT_THE_V86_HACK // V86 HACK
ULONG_PTR Esp0;
#endif
PVOID ExceptionList; PVOID ExceptionList;
KIRQL WaitIrql; KIRQL WaitIrql;
PVOID RetEip; PVOID RetEip;
@ -233,6 +236,11 @@ Ke386InitThreadWithContext(PKTHREAD Thread,
CtxSwitchFrame->RetEip = KiThreadStartup; CtxSwitchFrame->RetEip = KiThreadStartup;
CtxSwitchFrame->WaitIrql = APC_LEVEL; CtxSwitchFrame->WaitIrql = APC_LEVEL;
CtxSwitchFrame->ExceptionList = (PVOID)0xFFFFFFFF; CtxSwitchFrame->ExceptionList = (PVOID)0xFFFFFFFF;
#if WE_DO_NOT_SPEAK_ABOUT_THE_V86_HACK // V86 HACK
CtxSwitchFrame->Esp0 = (ULONG_PTR)Thread->InitialStack -
sizeof(FX_SAVE_AREA) -
0x10;
#endif
/* Save back the new value of the kernel stack. */ /* Save back the new value of the kernel stack. */
DPRINT("Final Kernel Stack: %x \n", CtxSwitchFrame); DPRINT("Final Kernel Stack: %x \n", CtxSwitchFrame);