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bsd-user: Add do_bsd_semop implementation

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Add implementation of semop(2) syscall to perform System V semaphore
operations. Converts target sembuf array to host format and executes
operations.

Signed-off-by: Stacey Son <sson@FreeBSD.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Warner Losh <imp@bsdimp.com>
This commit is contained in:
Stacey Son
2026-02-02 16:44:39 -07:00
committed by Warner Losh
parent 39fb6a5d09
commit 441ddfb820
1 changed files with 22 additions and 0 deletions
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22
bsd-user/bsd-misc.h
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@@ -77,6 +77,28 @@ static inline abi_long do_bsd_semget(abi_long key, int nsems,
target_to_host_bitmask(target_flags, ipc_flags_tbl)));
}
/* semop(2) */
static inline abi_long do_bsd_semop(int semid, abi_long ptr, unsigned nsops)
{
g_autofree struct sembuf *sops = g_malloc(nsops * sizeof(struct sembuf));
struct target_sembuf *target_sembuf;
int i;
target_sembuf = lock_user(VERIFY_READ, ptr,
nsops * sizeof(struct target_sembuf), 1);
if (target_sembuf == NULL) {
return -TARGET_EFAULT;
}
for (i = 0; i < nsops; i++) {
__get_user(sops[i].sem_num, &target_sembuf[i].sem_num);
__get_user(sops[i].sem_op, &target_sembuf[i].sem_op);
__get_user(sops[i].sem_flg, &target_sembuf[i].sem_flg);
}
unlock_user(target_sembuf, ptr, 0);
return semop(semid, sops, nsops);
}
/* getdtablesize(2) */
static inline abi_long do_bsd_getdtablesize(void)
{