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guest: Add memory barrier after saving context

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Forces all registers to be saved before signalling to the kernel that we
are ready; without this the kernel may read incorrect context data
causing undefined behaviour.
This commit is contained in:
Billy Laws 2020-01-22 20:34:00 +00:00 committed by ◱ PixelyIon
parent 00cdc1fd6f
commit 2aebf04b4b
1 changed files with 1 additions and 0 deletions
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app/src/main/cpp/skyline/nce/guest.S
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@ -19,6 +19,7 @@ saveCtx:
STP X26, X27, [LR, #224] STP X26, X27, [LR, #224]
STP X28, X29, [LR, #240] STP X28, X29, [LR, #240]
LDR LR, [SP], #16 LDR LR, [SP], #16
DSB SY
RET RET
.global loadCtx .global loadCtx