2c4ae3b0a4
Содержимое пина, зафиксированного в go.mod sing-box-lx, одним коммитом без истории. Полная история SagerNet/gvisor — 1.45 ГБ и клонируется в каждой CI-джобе; наша дельта — одна вставка в одну функцию, история для неё не нужна. Module path github.com/sagernet/gvisor сохранён намеренно: на него опирается replace-директива суперпроекта. Патч поверх — отдельным коммитом, чтобы дельта читалась одним git show и переносилась на новый пин копированием. SPECS/TASKS/048-GVISOR_HANDSHAKE_NIL_CRASH
135 lines
3.1 KiB
Go
135 lines
3.1 KiB
Go
// Copyright 2019 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 amd64
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// +build amd64
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package cpuid
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import "context"
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// Static is a static CPUID function.
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//
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// +stateify savable
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type Static map[In]Out
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// Fixed converts the FeatureSet to a fixed set.
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func (fs FeatureSet) Fixed() FeatureSet {
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sfs := fs.ToStatic().ToFeatureSet()
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sfs.hwCap = fs.hwCap
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return sfs
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}
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// ToStatic converts a FeatureSet to a Static function.
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//
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// You can create a new static feature set as:
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//
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// fs := otherFeatureSet.ToStatic().ToFeatureSet()
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func (fs FeatureSet) ToStatic() Static {
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s := make(Static)
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// Save all allowed top-level functions.
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for fn, allowed := range allowedBasicFunctions {
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if allowed {
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in := In{Eax: uint32(fn)}
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s[in] = fs.Query(in)
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}
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}
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// Save all allowed extended functions.
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for fn, allowed := range allowedExtendedFunctions {
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if allowed {
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in := In{Eax: uint32(fn) + uint32(extendedStart)}
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s[in] = fs.Query(in)
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}
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}
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// Save all features (may be redundant).
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for feature := range allFeatures {
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feature.set(s, fs.HasFeature(feature))
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}
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// Processor Extended State Enumeration.
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for i := uint32(0); i < xSaveInfoNumLeaves; i++ {
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in := In{Eax: uint32(xSaveInfo), Ecx: i}
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s[in] = fs.Query(in)
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}
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// Save all cache information.
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out := fs.Query(In{Eax: uint32(featureInfo)})
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for i := uint32(0); i < out.Ecx; i++ {
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in := In{Eax: uint32(intelDeterministicCacheParams), Ecx: i}
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out := fs.Query(in)
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s[in] = out
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if CacheType(out.Eax&0xf) == cacheNull {
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break
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}
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}
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return s
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}
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// ToFeatureSet converts a static specification to a FeatureSet.
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//
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// This overloads some local values, where required.
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func (s Static) ToFeatureSet() FeatureSet {
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// Make a copy.
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ns := make(Static)
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for k, v := range s {
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ns[k] = v
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}
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ns.normalize()
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return FeatureSet{ns, hwCap{}}
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}
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// afterLoad calls normalize.
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func (s Static) afterLoad(context.Context) {
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s.normalize()
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}
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// normalize normalizes FPU sizes.
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func (s Static) normalize() {
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// Override local FPU sizes, which must be fixed.
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fs := FeatureSet{s, hwCap{}}
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if fs.HasFeature(X86FeatureXSAVE) {
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in := In{Eax: uint32(xSaveInfo)}
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out := s[in]
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out.Ecx = max(out.Ecx, maxXsaveSize)
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out.Ebx = max(out.Ebx, xsaveSize)
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s[in] = out
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}
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}
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// Add adds a feature.
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func (s Static) Add(feature Feature) Static {
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feature.set(s, true)
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return s
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}
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// Remove removes a feature.
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func (s Static) Remove(feature Feature) Static {
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feature.set(s, false)
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return s
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}
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// Set implements ChangeableSet.Set.
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func (s Static) Set(in In, out Out) {
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s[in] = out
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}
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// Query implements Function.Query.
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func (s Static) Query(in In) Out {
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in.normalize()
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return s[in]
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}
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