github.com/metacubex/gvisor@v0.0.0-20240320004321-933faba989ec/pkg/sentry/platform/ptrace/ptrace_arm64.go (about) 1 // Copyright 2019 The gVisor Authors. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 package ptrace 16 17 import ( 18 "github.com/metacubex/gvisor/pkg/abi/linux" 19 pkgcontext "github.com/metacubex/gvisor/pkg/context" 20 "github.com/metacubex/gvisor/pkg/cpuid" 21 "github.com/metacubex/gvisor/pkg/sentry/arch" 22 ) 23 24 // archContext is architecture-specific context. 25 type archContext struct { 26 // fpLen is the size of the floating point state. 27 fpLen int 28 } 29 30 // init initializes the archContext. 31 func (a *archContext) init(ctx pkgcontext.Context) { 32 fs := cpuid.FromContext(ctx) 33 fpLen, _ := fs.ExtendedStateSize() 34 a.fpLen = int(fpLen) 35 } 36 37 // floatingPointLength returns the length of floating point state. 38 func (a *archContext) floatingPointLength() uint64 { 39 return uint64(a.fpLen) 40 } 41 42 // floatingPointRegSet returns the register set to fetch. 43 func (a *archContext) floatingPointRegSet() uintptr { 44 return linux.NT_PRFPREG 45 } 46 47 func stackPointer(r *arch.Registers) uintptr { 48 return uintptr(r.Sp) 49 }