func (t *thread) ptracePokeText(addr uintptr, out []byte) (int, os.Error) {
	c, err := syscall.PtracePokeText(t.tid, addr, out)
	if traceMem {
		fmt.Printf("poke(%#x, %v) => %v\n", addr, out, err)
	}
	return c, os.NewSyscallError("ptrace(POKETEXT)", err)
}
Exemplo n.º 2
0
func poke(pid int, addr uint64, data []byte) error {
	n, err := syscall.PtracePokeText(pid, uintptr(addr), data)
	if err != nil {
		return err
	}
	if n != len(data) {
		return fmt.Errorf("poke: got %d bytes, want %d", len(data))
	}
	return nil
}
Exemplo n.º 3
0
Arquivo: dynamic.go Projeto: yan/grace
// writeMemoryAligned is a wrapper for ptrace(PTRACE_POKETEXT) that attempts to
// make all calls wordsize-aligned. For some reason, this is completely
// different from readMemoryAligned and they should be merged.
func (p *Process) writeMemoryAligned(where uint64, bytes []byte) (count int, err error) {
	wordsize := int(unsafe.Sizeof(uintptr(0)))
	rem := len(bytes) % wordsize

	if rem > 0 {
		pad := make([]byte, wordsize)
		syscall.PtracePokeText(p.Pid, uintptr(where+uint64(len(bytes)-rem)), pad)
		bytes = append(bytes, pad[rem:]...)
	}

	for offset := 0; offset < len(bytes); offset += wordsize {
		toWrite := bytes[offset : offset+wordsize]
		cnt, err := syscall.PtracePokeText(p.Pid, uintptr(where+uint64(offset)), toWrite)
		if err != nil {
			return cnt, err
		}
		count += cnt
	}

	return
}
Exemplo n.º 4
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func (s *Server) ptracePoke(pid int, addr uintptr, data []byte) (err error) {
	s.fc <- func() error {
		n, err := syscall.PtracePokeText(pid, addr, data)
		if err != nil {
			return err
		}
		if n != len(data) {
			return fmt.Errorf("ptracePoke: poked %d bytes, want %d", n, len(data))
		}
		return nil
	}
	return <-s.ec
}
Exemplo n.º 5
0
Arquivo: dynamic.go Projeto: yan/grace
// SwapBytesText simple writes the slice 'what' to the location 'where' in the
// target process, returning the content that used to be at that address in
// the 'what' slice.
func (p *Process) SwapBytesText(where uint64, what []byte) bool {
	p.ensureNotRunning()

	saved := make([]byte, len(what))
	//cnt, err := syscall.PtracePeekText(p.Pid, uintptr(where), saved)
	cnt, err := p.readMemoryAligned(where, saved)
	if cnt != len(what) || err != nil {
		return false
	}

	cnt, err = syscall.PtracePokeText(p.Pid, uintptr(where), what)
	if cnt != len(what) || err != nil {
		fmt.Printf("failed writing")
		return false
	}

	copy(what, saved)
	return true
}
Exemplo n.º 6
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func (t *Tracer) PokeText(addr uintptr, data []byte) (int, error) {
	return syscall.PtracePokeText(t.Process.Pid, addr, data)
}