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Re: [PATCH] linux-user: implement the semtimedop syscall
From: |
Laurent Vivier |
Subject: |
Re: [PATCH] linux-user: implement the semtimedop syscall |
Date: |
Mon, 13 Jul 2020 18:18:23 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.9.0 |
Thank you but we have already a series pending to fix that:
https://patchew.org/QEMU/20200626124612.58593-1-mkysel@tachyum.com/
Laurent
Le 13/07/2020 à 12:05, Andreas Schwab a écrit :
> Signed-off-by: Andreas Schwab <schwab@suse.de>
> ---
> linux-user/syscall.c | 32 +++++++++++++++++++++++++++-----
> 1 file changed, 27 insertions(+), 5 deletions(-)
>
> diff --git a/linux-user/syscall.c b/linux-user/syscall.c
> index 9ec03a889d..7c0f5b83ff 100644
> --- a/linux-user/syscall.c
> +++ b/linux-user/syscall.c
> @@ -3877,23 +3877,37 @@ static inline abi_long target_to_host_sembuf(struct
> sembuf *host_sembuf,
> return 0;
> }
>
> -static inline abi_long do_semop(int semid, abi_long ptr, unsigned nsops)
> +static inline abi_long do_semtimedop(int semid, abi_long ptr, unsigned nsops,
> + abi_long timeout)
> {
> struct sembuf sops[nsops];
> + struct timespec ts, *pts;
> abi_long ret;
>
> if (target_to_host_sembuf(sops, ptr, nsops))
> return -TARGET_EFAULT;
>
> + if (timeout) {
> + pts = &ts;
> + if (target_to_host_timespec(pts, timeout)) {
> + return -TARGET_EFAULT;
> + }
> + } else {
> + pts = NULL;
> + }
> +
> ret = -TARGET_ENOSYS;
> #ifdef __NR_semtimedop
> - ret = get_errno(safe_semtimedop(semid, sops, nsops, NULL));
> + ret = get_errno(safe_semtimedop(semid, sops, nsops, pts));
> #endif
> #ifdef __NR_ipc
> if (ret == -TARGET_ENOSYS) {
> - ret = get_errno(safe_ipc(IPCOP_semtimedop, semid, nsops, 0, sops,
> 0));
> + ret = get_errno(safe_ipc(IPCOP_semtimedop, semid, nsops, 0, sops,
> pts));
> }
> #endif
> + if (!is_error(ret) && timeout) {
> + ret = host_to_target_timespec(timeout, pts);
> + }
> return ret;
> }
>
> @@ -4371,7 +4385,11 @@ static abi_long do_ipc(CPUArchState *cpu_env,
>
> switch (call) {
> case IPCOP_semop:
> - ret = do_semop(first, ptr, second);
> + ret = do_semtimedop(first, ptr, second, 0);
> + break;
> +
> + case IPCOP_semtimedop:
> + ret = do_semtimedop(first, ptr, second, third);
> break;
>
> case IPCOP_semget:
> @@ -9683,7 +9701,11 @@ static abi_long do_syscall1(void *cpu_env, int num,
> abi_long arg1,
> #endif
> #ifdef TARGET_NR_semop
> case TARGET_NR_semop:
> - return do_semop(arg1, arg2, arg3);
> + return do_semtimedop(arg1, arg2, arg3, 0);
> +#endif
> +#ifdef TARGET_NR_semtimedop
> + case TARGET_NR_semtimedop:
> + return do_semtimedop(arg1, arg2, arg3, arg4);
> #endif
> #ifdef TARGET_NR_semctl
> case TARGET_NR_semctl:
>