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linux-user: add ppoll syscall support 

Some architectures (like Blackfin) only implement ppoll (and skip poll).
So add support for it using existing poll code.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Riku Voipio <riku.voipio@nokia.com>
This commit is contained in:
Mike Frysinger 2011-02-07 01:05:51 -05:00 committed by Riku Voipio
parent 1af02e83c0
commit d8035d4cfc
1 changed files with 55 additions and 2 deletions
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57
linux-user/syscall.c
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@ -529,6 +529,15 @@ static int sys_inotify_init1(int flags)
#undef TARGET_NR_inotify_rm_watch
#endif /* CONFIG_INOTIFY */
#if defined(TARGET_NR_ppoll)
#ifndef __NR_ppoll
# define __NR_ppoll -1
#endif
#define __NR_sys_ppoll __NR_ppoll
_syscall5(int, sys_ppoll, struct pollfd *, fds, nfds_t, nfds,
struct timespec *, timeout, const __sigset_t *, sigmask,
size_t, sigsetsize)
#endif
extern int personality(int);
extern int flock(int, int);
@ -6230,8 +6239,13 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
ret = do_select(arg1, arg2, arg3, arg4, arg5);
break;
#endif
#ifdef TARGET_NR_poll
#if defined(TARGET_NR_poll) || defined(TARGET_NR_ppoll)
# ifdef TARGET_NR_poll
case TARGET_NR_poll:
# endif
# ifdef TARGET_NR_ppoll
case TARGET_NR_ppoll:
# endif
{
struct target_pollfd *target_pfd;
unsigned int nfds = arg2;
@ -6242,12 +6256,51 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
target_pfd = lock_user(VERIFY_WRITE, arg1, sizeof(struct target_pollfd) * nfds, 1);
if (!target_pfd)
goto efault;
pfd = alloca(sizeof(struct pollfd) * nfds);
for(i = 0; i < nfds; i++) {
pfd[i].fd = tswap32(target_pfd[i].fd);
pfd[i].events = tswap16(target_pfd[i].events);
}
ret = get_errno(poll(pfd, nfds, timeout));
# ifdef TARGET_NR_ppoll
if (num == TARGET_NR_ppoll) {
struct timespec _timeout_ts, *timeout_ts = &_timeout_ts;
target_sigset_t *target_set;
sigset_t _set, *set = &_set;
if (arg3) {
if (target_to_host_timespec(timeout_ts, arg3)) {
unlock_user(target_pfd, arg1, 0);
goto efault;
}
} else {
timeout_ts = NULL;
}
if (arg4) {
target_set = lock_user(VERIFY_READ, arg4, sizeof(target_sigset_t), 1);
if (!target_set) {
unlock_user(target_pfd, arg1, 0);
goto efault;
}
target_to_host_sigset(set, target_set);
} else {
set = NULL;
}
ret = get_errno(sys_ppoll(pfd, nfds, timeout_ts, set, _NSIG/8));
if (!is_error(ret) && arg3) {
host_to_target_timespec(arg3, timeout_ts);
}
if (arg4) {
unlock_user(target_set, arg4, 0);
}
} else
# endif
ret = get_errno(poll(pfd, nfds, timeout));
if (!is_error(ret)) {
for(i = 0; i < nfds; i++) {
target_pfd[i].revents = tswap16(pfd[i].revents);