[Minios-devel] [UNIKRAFT PATCHv6 12/23] plat/kvm: Add __TRAP_STACK_SIZE for stack pointer while exiting trap

[Jia He <justin.he@xxxxxxx>]

From: Wei Chen <wei.chen@xxxxxxx>
We have subtract the __TRAP_STACK_SIZE from sp while entering the tarp,
but while exiting the trap, we forgot to add __TRAP_STACK_SIZE back to
sp.

Signed-off-by: Wei Chen <wei.chen@xxxxxxx>
Signed-off-by: Jia He <justin.he@xxxxxxx>
Reviewed-by: Sharan Santhanam <sharan.santhanam@xxxxxxxxx>
---
 plat/kvm/arm/exceptions.S | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/plat/kvm/arm/exceptions.S b/plat/kvm/arm/exceptions.S
index af039d8..edce7d3 100644
--- a/plat/kvm/arm/exceptions.S
+++ b/plat/kvm/arm/exceptions.S
@@ -103,6 +103,8 @@
        ldp x2, x3, [sp, #16 * 1]
        ldp x0, x1, [sp, #16 * 0]

+       add sp, sp, #__TRAP_STACK_SIZE
+
        eret
 .endm

--
2.17.1

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