diff options
Diffstat (limited to 'linux-user/syscall.c')
| -rw-r--r-- | linux-user/syscall.c | 149 |
1 files changed, 130 insertions, 19 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 608924a27a..9f9693e806 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -550,6 +550,15 @@ _syscall5(int, sys_ppoll, struct pollfd *, fds, nfds_t, nfds, size_t, sigsetsize) #endif +#if defined(TARGET_NR_pselect6) +#ifndef __NR_pselect6 +# define __NR_pselect6 -1 +#endif +#define __NR_sys_pselect6 __NR_pselect6 +_syscall6(int, sys_pselect6, int, nfds, fd_set *, readfds, fd_set *, writefds, + fd_set *, exceptfds, struct timespec *, timeout, void *, sig); +#endif + extern int personality(int); extern int flock(int, int); extern int setfsuid(int); @@ -819,6 +828,20 @@ static inline abi_long copy_from_user_fdset(fd_set *fds, return 0; } +static inline abi_ulong copy_from_user_fdset_ptr(fd_set *fds, fd_set **fds_ptr, + abi_ulong target_fds_addr, + int n) +{ + if (target_fds_addr) { + if (copy_from_user_fdset(fds, target_fds_addr, n)) + return -TARGET_EFAULT; + *fds_ptr = fds; + } else { + *fds_ptr = NULL; + } + return 0; +} + static inline abi_long copy_to_user_fdset(abi_ulong target_fds_addr, const fd_set *fds, int n) @@ -984,6 +1007,7 @@ static inline abi_long copy_to_user_mq_attr(abi_ulong target_mq_attr_addr, } #endif +#if defined(TARGET_NR_select) || defined(TARGET_NR__newselect) /* do_select() must return target values and target errnos. */ static abi_long do_select(int n, abi_ulong rfd_addr, abi_ulong wfd_addr, @@ -994,26 +1018,17 @@ static abi_long do_select(int n, struct timeval tv, *tv_ptr; abi_long ret; - if (rfd_addr) { - if (copy_from_user_fdset(&rfds, rfd_addr, n)) - return -TARGET_EFAULT; - rfds_ptr = &rfds; - } else { - rfds_ptr = NULL; + ret = copy_from_user_fdset_ptr(&rfds, &rfds_ptr, rfd_addr, n); + if (ret) { + return ret; } - if (wfd_addr) { - if (copy_from_user_fdset(&wfds, wfd_addr, n)) - return -TARGET_EFAULT; - wfds_ptr = &wfds; - } else { - wfds_ptr = NULL; + ret = copy_from_user_fdset_ptr(&wfds, &wfds_ptr, wfd_addr, n); + if (ret) { + return ret; } - if (efd_addr) { - if (copy_from_user_fdset(&efds, efd_addr, n)) - return -TARGET_EFAULT; - efds_ptr = &efds; - } else { - efds_ptr = NULL; + ret = copy_from_user_fdset_ptr(&efds, &efds_ptr, efd_addr, n); + if (ret) { + return ret; } if (target_tv_addr) { @@ -1040,6 +1055,7 @@ static abi_long do_select(int n, return ret; } +#endif static abi_long do_pipe2(int host_pipe[], int flags) { @@ -5601,7 +5617,102 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, #endif #ifdef TARGET_NR_pselect6 case TARGET_NR_pselect6: - goto unimplemented_nowarn; + { + abi_long rfd_addr, wfd_addr, efd_addr, n, ts_addr; + fd_set rfds, wfds, efds; + fd_set *rfds_ptr, *wfds_ptr, *efds_ptr; + struct timespec ts, *ts_ptr; + + /* + * The 6th arg is actually two args smashed together, + * so we cannot use the C library. + */ + sigset_t set; + struct { + sigset_t *set; + size_t size; + } sig, *sig_ptr; + + abi_ulong arg_sigset, arg_sigsize, *arg7; + target_sigset_t *target_sigset; + + n = arg1; + rfd_addr = arg2; + wfd_addr = arg3; + efd_addr = arg4; + ts_addr = arg5; + + ret = copy_from_user_fdset_ptr(&rfds, &rfds_ptr, rfd_addr, n); + if (ret) { + goto fail; + } + ret = copy_from_user_fdset_ptr(&wfds, &wfds_ptr, wfd_addr, n); + if (ret) { + goto fail; + } + ret = copy_from_user_fdset_ptr(&efds, &efds_ptr, efd_addr, n); + if (ret) { + goto fail; + } + + /* + * This takes a timespec, and not a timeval, so we cannot + * use the do_select() helper ... + */ + if (ts_addr) { + if (target_to_host_timespec(&ts, ts_addr)) { + goto efault; + } + ts_ptr = &ts; + } else { + ts_ptr = NULL; + } + + /* Extract the two packed args for the sigset */ + if (arg6) { + sig_ptr = &sig; + sig.size = _NSIG / 8; + + arg7 = lock_user(VERIFY_READ, arg6, sizeof(*arg7) * 2, 1); + if (!arg7) { + goto efault; + } + arg_sigset = tswapl(arg7[0]); + arg_sigsize = tswapl(arg7[1]); + unlock_user(arg7, arg6, 0); + + if (arg_sigset) { + sig.set = &set; + target_sigset = lock_user(VERIFY_READ, arg_sigset, + sizeof(*target_sigset), 1); + if (!target_sigset) { + goto efault; + } + target_to_host_sigset(&set, target_sigset); + unlock_user(target_sigset, arg_sigset, 0); + } else { + sig.set = NULL; + } + } else { + sig_ptr = NULL; + } + + ret = get_errno(sys_pselect6(n, rfds_ptr, wfds_ptr, efds_ptr, + ts_ptr, sig_ptr)); + + if (!is_error(ret)) { + if (rfd_addr && copy_to_user_fdset(rfd_addr, &rfds, n)) + goto efault; + if (wfd_addr && copy_to_user_fdset(wfd_addr, &wfds, n)) + goto efault; + if (efd_addr && copy_to_user_fdset(efd_addr, &efds, n)) + goto efault; + + if (ts_addr && host_to_target_timespec(ts_addr, &ts)) + goto efault; + } + } + break; #endif case TARGET_NR_symlink: { |