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[NTOS:KE] Save and restore previous mode in KiZwSystemService and fix restoring the trap frame

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This commit is contained in:
Timo Kreuzer 2018-02-05 01:23:30 +01:00
parent b2a483b9ea
commit 3aaee35629
1 changed files with 9 additions and 1 deletions
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10
ntoskrnl/ke/amd64/trap.S
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@ -835,6 +835,10 @@ FUNC KiZwSystemService
/* Get current thread */
mov r11, gs:[PcCurrentThread]
/* Save PreviousMode in the trap frame */
mov dil, byte ptr [r11 + KTHREAD_PreviousMode]
mov byte ptr [rbp + KTRAP_FRAME_PreviousMode], dil
/* Save the old trap frame in TrapFrame.Rdx */
mov rdi, [r11 + KTHREAD_TrapFrame]
mov [rbp + KTRAP_FRAME_Rdx], rdi
@ -865,9 +869,13 @@ FUNC KiZwSystemService
/* Restore the old trap frame */
mov r11, gs:[PcCurrentThread]
mov rsi, [rsp + KTRAP_FRAME_Rdx]
mov rsi, [rbp + KTRAP_FRAME_Rdx]
mov [r11 + KTHREAD_TrapFrame], rsi
/* Restore PreviousMode from the trap frame */
mov dil, byte ptr [rbp + KTRAP_FRAME_PreviousMode]
mov byte ptr [r11 + KTHREAD_PreviousMode], dil
/* Restore rdi and rsi */
mov rsi, [rbp + KTRAP_FRAME_Rsi]
mov rdi, [rbp + KTRAP_FRAME_Rdi]