func main() {
c := cmd.NewUsercornRawCmd()
c.NoArgs = true
var shellcode []byte
oldMake := c.MakeUsercorn
c.MakeUsercorn = func(exe string) (models.Usercorn, error) {
var err error
shellcode, err = hex.DecodeString(exe)
if err != nil {
return nil, err
}
return oldMake(exe)
}
c.RunUsercorn = func(args, env []string) error {
u := c.Usercorn
mem, err := u.Mmap(u.Entry(), uint64(len(shellcode)))
if err != nil {
return err
}
mem.Desc = "shellcode"
if err := u.MemWrite(mem.Addr, shellcode); err != nil {
return err
}
u.SetEntry(mem.Addr)
u.SetExit(mem.Addr + uint64(len(shellcode)))
return u.Run(args, env)
}
c.Run(os.Args, os.Environ())
}
func main() {
c := cmd.NewUsercornRawCmd()
c.NoExe = true
c.NoArgs = true
c.RunUsercorn = func(args, env []string) error {
u := c.Usercorn
mem, err := u.Mmap(u.Entry(), 0x10000)
if err != nil {
return err
}
mem.Desc = "repl"
status := models.StatusDiff{U: u}
fmt.Printf("%s", status.Changes(false).String("", c.Config.Color))
addr := mem.Addr
end := addr
input := bufio.NewScanner(os.Stdin)
for {
fmt.Printf("%s", status.Changes(true).String("", c.Config.Color))
fmt.Printf("0x%x: ", addr)
if !input.Scan() {
break
}
text := input.Text()
if len(text) > 0 && text[0] == '.' {
if handleCmd(c, text) {
continue
}
}
sc, err := u.Assemble(text, addr)
if err != nil {
fmt.Printf("asm err: %s\n", err)
continue
}
if err := u.MemWrite(addr, sc); err != nil {
fmt.Printf("write err: %s\n", err)
continue
}
end = addr + uint64(len(sc))
u.SetEntry(addr)
u.SetExit(end)
if err := u.Run(os.Args, os.Environ()); err != nil {
fmt.Printf("exec err: %s\n", err)
}
addr = end
}
fmt.Printf("\n%s", status.Changes(false).String("", c.Config.Color))
return nil
}
c.Run(os.Args, os.Environ())
}