Re: [PATCH 20/22] Implement shmctl(2)

[Karim Taha <kariem.taha2.7@gmail.com>]

Richard Henderson <richard.henderson@linaro.org> wrote:

> On 8/19/23 02:48, Karim Taha wrote:
>> +    switch (cmd) {
>> +    case IPC_STAT:
>> +    case IPC_SET:
>> +        if (target_to_host_shmid_ds(&dsarg, buff)) {
>> +            return -TARGET_EFAULT;
>> +        }
>> +        ret = get_errno(shmctl(shmid, cmd, &dsarg));
>> +        if (host_to_target_shmid_ds(buff, &dsarg)) {
>> +            return -TARGET_EFAULT;
>> +        }
>> +        break;
>
> IPC_STAT treats buff as output, IPC_SET treats buff as input,
> so these cases can't be combined.
>
>
> r~

I think they can be combined:
1- we marshal the struct `buff` from target to host
2- call `shmctl`
3- marshal the results back.

--
Karim Taha