mirror of
https://github.com/netbirdio/gvisor.git
synced 2026-05-22 17:12:49 -07:00
Konstantin Bogomolov
4a0bf841d9
In practice we don't seem to ever use it. PiperOrigin-RevId: 681073641
46 lines
1.7 KiB
Go
46 lines
1.7 KiB
Go
// Copyright 2024 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 linux
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// +build linux
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// Package hostsyscall provides functions like unix.RawSyscall, but without the
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// overhead of multiple stack frame allocations.
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//
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// This is mostly relevant for platform/kvm which needs to execute some function
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// call chains in a go:nosplit environment. Debug builds specifically make using
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// unix.RawSyscall variants infeasible.
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package hostsyscall
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import (
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"golang.org/x/sys/unix"
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)
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// RawSyscall6 is a copy of runtime.Syscall6.
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func RawSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1 uintptr, errno unix.Errno)
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// RawSyscall is a copy of runtime.Syscall6, but only uses the first three arguments.
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func RawSyscall(trap, a1, a2, a3 uintptr) (r1 uintptr, errno unix.Errno)
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// Variants of runtime.Syscall6 that use slightly less stack space by only
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// returning errno.
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// RawSyscallErrno6 is like RawSyscall6, but only returns errno,
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// and 0 if successful.
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func RawSyscallErrno6(trap, a1, a2, a3, a4, a5, a6 uintptr) unix.Errno
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// RawSyscallErrno is like RawSyscall, but only returns errno,
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// and 0 if successful.
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func RawSyscallErrno(trap, a1, a2, a3 uintptr) unix.Errno
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