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[NTOS:KE:X64] Zero out volatiles when returning from a system call

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This commit is contained in:
Timo Kreuzer 2018-05-15 14:07:12 +02:00
parent a016ccd117
commit 1bfacf06f7
1 changed files with 10 additions and 0 deletions
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10
ntoskrnl/ke/amd64/trap.S
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@ -824,6 +824,16 @@ IntsEnabled:
/* Swap gs back to user */
swapgs
; Zero out volatiles
pxor xmm0, xmm0
pxor xmm1, xmm1
pxor xmm2, xmm2
pxor xmm3, xmm3
pxor xmm4, xmm4
pxor xmm5, xmm5
xor rdx, rdx
xor r10, r10
/* return to user mode */
.byte HEX(48) // REX prefix to return to long mode
sysret