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Prepare the vcpu environment for sentry on Arm64 

Signed-off-by: Bin Lu <bin.lu@arm.com>
This commit is contained in:
Bin Lu 2020-02-27 01:19:28 -05:00
parent a92087f0f8
commit 5f0e8e6239
1 changed files with 18 additions and 0 deletions
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18
pkg/sentry/platform/ring0/entry_arm64.s
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@ -394,6 +394,8 @@ TEXT ·Current(SB),NOSPLIT,$0-8
#define STACK_FRAME_SIZE 16
// kernelExitToEl0 is the entrypoint for application in guest_el0.
// Prepare the vcpu environment for container application.
TEXT ·kernelExitToEl0(SB),NOSPLIT,$0
// Step1, save sentry context into memory.
REGISTERS_SAVE(RSV_REG, CPU_REGISTERS)
@ -464,7 +466,23 @@ TEXT ·kernelExitToEl0(SB),NOSPLIT,$0
ERET()
// kernelExitToEl1 is the entrypoint for sentry in guest_el1.
// Prepare the vcpu environment for sentry.
TEXT ·kernelExitToEl1(SB),NOSPLIT,$0
WORD $0xd538d092 //MRS TPIDR_EL1, R18
MOVD CPU_REGISTERS+PTRACE_PSTATE(RSV_REG), R1
WORD $0xd5184001 //MSR R1, SPSR_EL1
MOVD CPU_REGISTERS+PTRACE_PC(RSV_REG), R1
MSR R1, ELR_EL1
MOVD CPU_REGISTERS+PTRACE_SP(RSV_REG), R1
MOVD R1, RSP
REGISTERS_LOAD(RSV_REG, CPU_REGISTERS)
MOVD CPU_REGISTERS+PTRACE_R9(RSV_REG), RSV_REG_APP
ERET()
// Start is the CPU entrypoint.