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linux-user: Use safe_syscall for sigsuspend syscalls 

Use the safe_syscall wrapper for sigsuspend syscalls. This
means that we will definitely deliver a signal that arrives
before we do the sigsuspend call, rather than blocking first
and delivering afterwards.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This commit is contained in:
Peter Maydell 2016-05-27 15:51:48 +01:00 committed by Riku Voipio
parent b28a1f333a
commit 2fe4fba115
1 changed files with 3 additions and 2 deletions
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5
linux-user/syscall.c
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@ -716,6 +716,7 @@ safe_syscall6(int, pselect6, int, nfds, fd_set *, readfds, fd_set *, writefds, \
fd_set *, exceptfds, struct timespec *, timeout, void *, sig)
safe_syscall6(int,futex,int *,uaddr,int,op,int,val, \
const struct timespec *,timeout,int *,uaddr2,int,val3)
safe_syscall2(int, rt_sigsuspend, sigset_t *, newset, size_t, sigsetsize)
static inline int host_to_target_sock_type(int host_type)
{
@ -7648,7 +7649,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
target_to_host_old_sigset(&set, p);
unlock_user(p, arg1, 0);
#endif
ret = get_errno(sigsuspend(&set));
ret = get_errno(safe_rt_sigsuspend(&set, SIGSET_T_SIZE));
}
break;
#endif
@ -7659,7 +7660,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
goto efault;
target_to_host_sigset(&set, p);
unlock_user(p, arg1, 0);
ret = get_errno(sigsuspend(&set));
ret = get_errno(safe_rt_sigsuspend(&set, SIGSET_T_SIZE));
}
break;
case TARGET_NR_rt_sigtimedwait: