90 lines
2.3 KiB
Go
90 lines
2.3 KiB
Go
// Copyright 2019 Google Inc.
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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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// +build amd64
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package kernel
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import (
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"gvisor.googlesource.com/gvisor/pkg/abi/linux"
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"gvisor.googlesource.com/gvisor/pkg/sentry/usermem"
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"gvisor.googlesource.com/gvisor/pkg/syserror"
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)
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// ptraceArch implements arch-specific ptrace commands.
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func (t *Task) ptraceArch(target *Task, req int64, addr, data usermem.Addr) error {
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switch req {
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case linux.PTRACE_PEEKUSR: // aka PTRACE_PEEKUSER
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n, err := target.Arch().PtracePeekUser(uintptr(addr))
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if err != nil {
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return err
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}
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_, err = t.CopyOut(data, n)
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return err
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case linux.PTRACE_POKEUSR: // aka PTRACE_POKEUSER
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return target.Arch().PtracePokeUser(uintptr(addr), uintptr(data))
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case linux.PTRACE_GETREGS:
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// "Copy the tracee's general-purpose ... registers ... to the address
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// data in the tracer. ... (addr is ignored.) Note that SPARC systems
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// have the meaning of data and addr reversed ..."
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_, err := target.Arch().PtraceGetRegs(&usermem.IOReadWriter{
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Ctx: t,
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IO: t.MemoryManager(),
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Addr: data,
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Opts: usermem.IOOpts{
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AddressSpaceActive: true,
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},
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})
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return err
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case linux.PTRACE_GETFPREGS:
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_, err := target.Arch().PtraceGetFPRegs(&usermem.IOReadWriter{
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Ctx: t,
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IO: t.MemoryManager(),
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Addr: data,
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Opts: usermem.IOOpts{
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AddressSpaceActive: true,
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},
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})
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return err
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case linux.PTRACE_SETREGS:
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_, err := target.Arch().PtraceSetRegs(&usermem.IOReadWriter{
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Ctx: t,
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IO: t.MemoryManager(),
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Addr: data,
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Opts: usermem.IOOpts{
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AddressSpaceActive: true,
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},
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})
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return err
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case linux.PTRACE_SETFPREGS:
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_, err := target.Arch().PtraceSetFPRegs(&usermem.IOReadWriter{
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Ctx: t,
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IO: t.MemoryManager(),
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Addr: data,
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Opts: usermem.IOOpts{
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AddressSpaceActive: true,
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},
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})
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return err
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default:
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return syserror.EIO
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}
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}
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