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[NTOS:Ke/x64] Improve KiDispatchExceptionToUser

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Return back to the caller instead of exiting through KiServiceExit2, which is broken and needs to be changed to allow restoring of an exception frame.
This commit is contained in:
Timo Kreuzer 2022-12-15 20:58:32 +01:00
parent 24b4026ce8
commit 5b82ada2ed
1 changed files with 9 additions and 5 deletions
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14
ntoskrnl/ke/amd64/except.c
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@ -93,7 +93,7 @@ KeInitExceptions(VOID)
}
static
VOID
BOOLEAN
KiDispatchExceptionToUser(
IN PKTRAP_FRAME TrapFrame,
IN PCONTEXT Context,
@ -147,7 +147,7 @@ KiDispatchExceptionToUser(
/* Nothing we can do here */
_disable();
_SEH2_YIELD(return);
return FALSE;
}
_SEH2_END;
@ -172,7 +172,7 @@ KiDispatchExceptionToUser(
_disable();
/* Exit to usermode */
KiServiceExit2(TrapFrame);
return TRUE;
}
static
@ -361,8 +361,12 @@ KiDispatchException(IN PEXCEPTION_RECORD ExceptionRecord,
/* Forward exception to user mode debugger */
if (DbgkForwardException(ExceptionRecord, TRUE, FALSE)) return;
/* Forward exception to user mode (does not return, if successful) */
KiDispatchExceptionToUser(TrapFrame, &Context, ExceptionRecord);
/* Forward exception to user mode */
if (KiDispatchExceptionToUser(TrapFrame, &Context, ExceptionRecord))
{
/* Success, the exception will be handled by KiUserExceptionDispatcher */
return;
}
/* Failed to dispatch, fall through for second chance handling */
}