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| author | gVisor bot <gvisor-bot@google.com> | 2020-03-26 08:49:12 -0700 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2020-03-26 08:49:12 -0700 |
| commit | 7aa388ce744877f94854517df1080f42921422cb (patch) | |
| tree | 8712a6704007d09b9c3a429e449c799c6654787e /pkg/sentry/platform | |
| parent | de694e5484502d53166d70b36141e62fcdf07803 (diff) | |
| parent | 5f0e8e6239108c1b597e1cb8cb588bbf09d192b7 (diff) | |
Merge pull request #1986 from lubinszARM:pr_ring0_clean_1
PiperOrigin-RevId: 303105826
Diffstat (limited to 'pkg/sentry/platform')
| -rw-r--r-- | pkg/sentry/platform/ring0/entry_arm64.s | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/pkg/sentry/platform/ring0/entry_arm64.s b/pkg/sentry/platform/ring0/entry_arm64.s index d42eda37b..db6465663 100644 --- a/pkg/sentry/platform/ring0/entry_arm64.s +++ b/pkg/sentry/platform/ring0/entry_arm64.s @@ -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. |