diff options
| -rw-r--r-- | pkg/sentry/platform/kvm/bluepill_amd64.s | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/pkg/sentry/platform/kvm/bluepill_amd64.s b/pkg/sentry/platform/kvm/bluepill_amd64.s index 953024600..c2a1dca11 100644 --- a/pkg/sentry/platform/kvm/bluepill_amd64.s +++ b/pkg/sentry/platform/kvm/bluepill_amd64.s @@ -37,7 +37,15 @@ TEXT ·bluepill(SB),NOSPLIT,$0 begin: MOVQ vcpu+0(FP), AX LEAQ VCPU_CPU(AX), BX + + // The gorountine stack will be changed in guest which renders + // the frame pointer outdated and misleads perf tools. + // Disconnect the frame-chain with the zeroed frame pointer + // when it is saved in the frame in bluepillHandler(). + MOVQ BP, CX + MOVQ $0, BP BYTE CLI; + MOVQ CX, BP check_vcpu: MOVQ ENTRY_CPU_SELF(GS), CX CMPQ BX, CX |