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// Copyright 2021 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package systrap
import (
"golang.org/x/sys/unix"
"gvisor.dev/gvisor/pkg/abi/linux"
"gvisor.dev/gvisor/pkg/seccomp"
)
func appendSysThreadArchSeccompRules(rules []seccomp.RuleSet) []seccomp.RuleSet {
return append(rules, []seccomp.RuleSet{
{
// Rules for trapping vsyscall access.
Rules: seccomp.MakeSyscallRules(map[uintptr]seccomp.SyscallRule{
unix.SYS_GETTIMEOFDAY: seccomp.MatchAll{},
unix.SYS_TIME: seccomp.MatchAll{},
unix.SYS_GETCPU: seccomp.MatchAll{}, // SYS_GETCPU was not defined in package syscall on amd64.
}),
Action: linux.SECCOMP_RET_TRAP,
Vsyscall: true,
},
{
Rules: seccomp.MakeSyscallRules(map[uintptr]seccomp.SyscallRule{
unix.SYS_ARCH_PRCTL: seccomp.Or{
seccomp.PerArg{
seccomp.EqualTo(linux.ARCH_SET_FS),
seccomp.AnyValue{},
seccomp.AnyValue{},
seccomp.AnyValue{},
seccomp.AnyValue{},
seccomp.AnyValue{},
seccomp.GreaterThan(stubStart), // rip
},
seccomp.PerArg{
seccomp.EqualTo(linux.ARCH_GET_FS),
seccomp.AnyValue{},
seccomp.AnyValue{},
seccomp.AnyValue{},
seccomp.AnyValue{},
seccomp.AnyValue{},
seccomp.GreaterThan(stubStart), // rip
},
},
}),
Action: linux.SECCOMP_RET_ALLOW,
},
}...)
}
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