linux-user: add pselect6 syscall support
Some architectures (like Blackfin) only implement pselect6 (and skip select/newselect). So add support for it. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
This commit is contained in:
Mike Frysinger
Riku Voipio
parent
4d1de87c75
commit
055e090687
@ -550,6 +550,15 @@ _syscall5(int, sys_ppoll, struct pollfd *, fds, nfds_t, nfds,
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size_t, sigsetsize)
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#endif
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#if defined(TARGET_NR_pselect6)
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#ifndef __NR_pselect6
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# define __NR_pselect6 -1
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#endif
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#define __NR_sys_pselect6 __NR_pselect6
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_syscall6(int, sys_pselect6, int, nfds, fd_set *, readfds, fd_set *, writefds,
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fd_set *, exceptfds, struct timespec *, timeout, void *, sig);
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#endif
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extern int personality(int);
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extern int flock(int, int);
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extern int setfsuid(int);
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@ -819,6 +828,20 @@ static inline abi_long copy_from_user_fdset(fd_set *fds,
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return 0;
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}
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static inline abi_ulong copy_from_user_fdset_ptr(fd_set *fds, fd_set **fds_ptr,
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abi_ulong target_fds_addr,
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int n)
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{
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if (target_fds_addr) {
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if (copy_from_user_fdset(fds, target_fds_addr, n))
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return -TARGET_EFAULT;
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*fds_ptr = fds;
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} else {
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*fds_ptr = NULL;
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}
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return 0;
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}
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static inline abi_long copy_to_user_fdset(abi_ulong target_fds_addr,
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const fd_set *fds,
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int n)
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@ -984,6 +1007,7 @@ static inline abi_long copy_to_user_mq_attr(abi_ulong target_mq_attr_addr,
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}
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#endif
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#if defined(TARGET_NR_select) || defined(TARGET_NR__newselect)
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/* do_select() must return target values and target errnos. */
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static abi_long do_select(int n,
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abi_ulong rfd_addr, abi_ulong wfd_addr,
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@ -994,26 +1018,17 @@ static abi_long do_select(int n,
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struct timeval tv, *tv_ptr;
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abi_long ret;
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if (rfd_addr) {
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if (copy_from_user_fdset(&rfds, rfd_addr, n))
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return -TARGET_EFAULT;
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rfds_ptr = &rfds;
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} else {
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rfds_ptr = NULL;
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ret = copy_from_user_fdset_ptr(&rfds, &rfds_ptr, rfd_addr, n);
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if (ret) {
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return ret;
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}
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if (wfd_addr) {
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if (copy_from_user_fdset(&wfds, wfd_addr, n))
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return -TARGET_EFAULT;
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wfds_ptr = &wfds;
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} else {
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wfds_ptr = NULL;
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ret = copy_from_user_fdset_ptr(&wfds, &wfds_ptr, wfd_addr, n);
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if (ret) {
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return ret;
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}
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if (efd_addr) {
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if (copy_from_user_fdset(&efds, efd_addr, n))
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return -TARGET_EFAULT;
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efds_ptr = &efds;
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} else {
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efds_ptr = NULL;
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ret = copy_from_user_fdset_ptr(&efds, &efds_ptr, efd_addr, n);
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if (ret) {
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return ret;
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}
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if (target_tv_addr) {
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@ -1040,6 +1055,7 @@ static abi_long do_select(int n,
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return ret;
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}
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#endif
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static abi_long do_pipe2(int host_pipe[], int flags)
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{
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@ -5601,7 +5617,102 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
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#endif
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#ifdef TARGET_NR_pselect6
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case TARGET_NR_pselect6:
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goto unimplemented_nowarn;
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{
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abi_long rfd_addr, wfd_addr, efd_addr, n, ts_addr;
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fd_set rfds, wfds, efds;
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fd_set *rfds_ptr, *wfds_ptr, *efds_ptr;
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struct timespec ts, *ts_ptr;
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/*
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* The 6th arg is actually two args smashed together,
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* so we cannot use the C library.
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*/
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sigset_t set;
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struct {
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sigset_t *set;
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size_t size;
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} sig, *sig_ptr;
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abi_ulong arg_sigset, arg_sigsize, *arg7;
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target_sigset_t *target_sigset;
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n = arg1;
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rfd_addr = arg2;
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wfd_addr = arg3;
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efd_addr = arg4;
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ts_addr = arg5;
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ret = copy_from_user_fdset_ptr(&rfds, &rfds_ptr, rfd_addr, n);
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if (ret) {
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goto fail;
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}
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ret = copy_from_user_fdset_ptr(&wfds, &wfds_ptr, wfd_addr, n);
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if (ret) {
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goto fail;
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}
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ret = copy_from_user_fdset_ptr(&efds, &efds_ptr, efd_addr, n);
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if (ret) {
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goto fail;
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}
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/*
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* This takes a timespec, and not a timeval, so we cannot
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* use the do_select() helper ...
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*/
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if (ts_addr) {
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if (target_to_host_timespec(&ts, ts_addr)) {
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goto efault;
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}
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ts_ptr = &ts;
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} else {
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ts_ptr = NULL;
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}
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/* Extract the two packed args for the sigset */
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if (arg6) {
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sig_ptr = &sig;
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sig.size = _NSIG / 8;
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arg7 = lock_user(VERIFY_READ, arg6, sizeof(*arg7) * 2, 1);
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if (!arg7) {
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goto efault;
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}
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arg_sigset = tswapl(arg7[0]);
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arg_sigsize = tswapl(arg7[1]);
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unlock_user(arg7, arg6, 0);
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if (arg_sigset) {
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sig.set = &set;
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target_sigset = lock_user(VERIFY_READ, arg_sigset,
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sizeof(*target_sigset), 1);
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if (!target_sigset) {
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goto efault;
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}
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target_to_host_sigset(&set, target_sigset);
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unlock_user(target_sigset, arg_sigset, 0);
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} else {
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sig.set = NULL;
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}
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} else {
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sig_ptr = NULL;
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}
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ret = get_errno(sys_pselect6(n, rfds_ptr, wfds_ptr, efds_ptr,
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ts_ptr, sig_ptr));
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if (!is_error(ret)) {
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if (rfd_addr && copy_to_user_fdset(rfd_addr, &rfds, n))
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goto efault;
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if (wfd_addr && copy_to_user_fdset(wfd_addr, &wfds, n))
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goto efault;
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if (efd_addr && copy_to_user_fdset(efd_addr, &efds, n))
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goto efault;
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if (ts_addr && host_to_target_timespec(ts_addr, &ts))
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goto efault;
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}
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}
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break;
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#endif
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case TARGET_NR_symlink:
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{
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