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[NTOSKRNL]

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- Use NtTib.ExceptionList instead of Used_ExceptionList
- use ALIGN_DOWN_BY macro

svn path=/trunk/; revision=52857
This commit is contained in:
Timo Kreuzer 2011-07-25 00:50:53 +00:00
parent 66e64692b7
commit 406885c606
1 changed files with 10 additions and 8 deletions
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18
reactos/ntoskrnl/ke/i386/usercall.c
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@ -4,6 +4,7 @@
* FILE: ntoskrnl/ke/i386/usercall.c
* PURPOSE: User-mode Callout Mechanisms (APC and Win32K Callbacks)
* PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
* Timo Kreuzer (timo.kreuzer@reactos.org)
*/
/* INCLUDES ******************************************************************/
@ -208,8 +209,9 @@ KeUserModeCallback(IN ULONG RoutineIndex,
return CallbackStatus;
}
/* Stack layout:
*
/*
* Stack layout for KiUserModeCallout:
* ----------------------------------
* KCALLOUT_FRAME.ResultLength <= 2nd Parameter to KiCallUserMode
* KCALLOUT_FRAME.Result <= 1st Parameter to KiCallUserMode
@ -271,8 +273,8 @@ KiUserModeCallout(PKCALLOUT_FRAME CalloutFrame)
}
#endif
/* Align stack on 16-byte boundary */
InitialStack = (ULONG_PTR)CalloutFrame & ~15;
/* Align stack on a 16-byte boundary */
InitialStack = ALIGN_DOWN_BY(CalloutFrame, 16);
/* Check if we have enough space on the stack */
if ((InitialStack - KERNEL_STACK_SIZE) < CurrentThread->StackLimit)
@ -322,20 +324,20 @@ KiUserModeCallout(PKCALLOUT_FRAME CalloutFrame)
Pcr = KeGetPcr();
/* Update the exception list */
CallbackTrapFrame->ExceptionList = Pcr->Used_ExceptionList;
CallbackTrapFrame->ExceptionList = Pcr->NtTib.ExceptionList;
/* Get TSS */
Tss = Pcr->TSS;
/* Bias the stack for V86 mode */
/* Check for V86 mode */
if (CallbackTrapFrame->EFlags & EFLAGS_V86_MASK)
{
/* Set new stack address in TSS */
/* Set new stack address in TSS (full trap frame) */
Tss->Esp0 = (ULONG_PTR)(CallbackTrapFrame + 1);
}
else
{
/* Set new stack address in TSS */
/* Set new stack address in TSS (non-V86 trap frame) */
Tss->Esp0 = (ULONG_PTR)&CallbackTrapFrame->V86Es;
}