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https://github.com/hanzoai/visor.git
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Konstantin BogomolovandgVisor bot
80569583f9
The only thing incompatible was using syscallStubMessageOffset; the simplest fix is to just set it dynamically instead of doing conditional compilation in the assembly file. Updates #8196. PiperOrigin-RevId: 919116883
63 lines
1.7 KiB
Go
63 lines
1.7 KiB
Go
// Copyright 2021 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//go:build arm64
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// +build arm64
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package systrap
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import (
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"fmt"
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"runtime"
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"golang.org/x/sys/unix"
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"gvisor.dev/gvisor/pkg/hostsyscall"
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"gvisor.dev/gvisor/pkg/sentry/arch"
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)
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func (t *syscallThread) detach() {
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p := t.thread
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// The syscall thread can't handle any signals and doesn't expect to
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// receive anything.
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t.maskAllSignalsAttached()
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regs := p.initRegs
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regs.Sp = 0
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regs.Regs[12] = uint64(t.stubAddr)
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regs.Regs[13] = uint64(t.sentryMessage.state + 1)
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regs.Regs[19] = uint64(t.stubAddr + syscallStubMessageOffset)
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if t.seccompNotify != nil {
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regs.Regs[9] = _RUN_SECCOMP_LOOP
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} else {
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regs.Regs[9] = _RUN_SYSCALL_LOOP
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}
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// Skip the syscall instruction.
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regs.Pc += arch.SyscallWidth
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if err := p.setRegs(®s); err != nil {
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panic(fmt.Sprintf("ptrace set regs failed: %v", err))
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}
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p.detach()
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if e := hostsyscall.RawSyscallErrno(unix.SYS_TGKILL, uintptr(p.tgid), uintptr(p.tid), uintptr(unix.SIGCONT)); e != 0 {
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panic(fmt.Sprintf("tkill failed: %v", e))
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}
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runtime.UnlockOSThread()
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if t.seccompNotify != nil {
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if err := t.waitForSeccompNotify(); err != nil {
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panic(fmt.Sprintf("%s", err))
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}
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}
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}
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