func (u *Usercorn) Syscall(num int, name string, getArgs func(n int) ([]uint64, error)) (uint64, error) {
if name == "" {
panic(fmt.Sprintf("Syscall missing: %d", num))
}
indent := ""
if u.config.TraceSys && u.stacktrace.Len() > 0 {
indent = strings.Repeat(" ", u.stacktrace.Len()-1)
u.Printf("%s", u.memlog.Flush(indent, u.arch.Bits))
}
for _, k := range u.kernels {
if sys := co.Lookup(u, k, name); sys != nil {
args, err := getArgs(len(sys.In))
if err != nil {
return 0, err
}
if u.config.TraceSys {
u.Printf(indent + "s ")
u.Printf("%s", sys.Trace(args))
// don't memlog our strace
u.memlog.Reset()
}
ret := sys.Call(args)
if u.config.TraceSys {
// don't memlog ret either
u.memlog.Freeze()
// TODO: print this manually?
u.Printf("%s", sys.TraceRet(args, ret))
}
u.Printf("%s", u.memlog.Flush(indent, u.arch.Bits))
return ret, nil
}
}
panic(fmt.Errorf("Kernel not found for syscall '%s'", name))
}
func (k *LinuxKernel) Socketcall(index int, params co.Buf) uint64 {
if name, ok := socketCallMap[index]; ok {
if sys := co.Lookup(k.U, k, name); sys != nil {
rawArgs := make([]uint32, len(sys.In))
if err := params.Unpack(rawArgs); err != nil {
return posix.UINT64_MAX
}
args := make([]uint64, len(rawArgs))
for i, v := range rawArgs {
args[i] = uint64(v)
}
return sys.Call(args)
}
}
return posix.UINT64_MAX // FIXME
}