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// Copyright 2023 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.
//go:build arm64
// +build arm64
package sysmsg
import (
_ "embed"
"fmt"
"strings"
"gvisor.dev/gvisor/pkg/cpuid"
)
// SighandlerBlob contains the compiled code of the sysmsg signal handler.
//
//go:embed sighandler.built-in.arm64.bin
var SighandlerBlob []byte
// ArchState defines variables specific to the architecture being
// used.
type ArchState struct {
fpLen uint32
}
// Init initializes the arch specific state.
func (s *ArchState) Init() {
fs := cpuid.HostFeatureSet()
fpLenUint, _ := fs.ExtendedStateSize()
s.fpLen = uint32(fpLenUint)
}
// FpLen returns the FP state length for ARM.
func (s *ArchState) FpLen() int {
return int(s.fpLen)
}
func (s *ArchState) String() string {
var b strings.Builder
fmt.Fprintf(&b, "sysmsg.ArchState{")
fmt.Fprintf(&b, " fpLen %d", s.fpLen)
b.WriteString(" }")
return b.String()
}
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