diff options
Diffstat (limited to 'sys/compat/cloudabi32/cloudabi32_fd.c')
| -rw-r--r-- | sys/compat/cloudabi32/cloudabi32_fd.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/sys/compat/cloudabi32/cloudabi32_fd.c b/sys/compat/cloudabi32/cloudabi32_fd.c new file mode 100644 index 000000000000..19907a95b07e --- /dev/null +++ b/sys/compat/cloudabi32/cloudabi32_fd.c @@ -0,0 +1,145 @@ +/*- + * Copyright (c) 2015 Nuxi, https://nuxi.nl/ + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/kernel.h> +#include <sys/limits.h> +#include <sys/malloc.h> +#include <sys/syscallsubr.h> +#include <sys/systm.h> +#include <sys/uio.h> + +#include <contrib/cloudabi/cloudabi32_types.h> + +#include <compat/cloudabi32/cloudabi32_proto.h> +#include <compat/cloudabi32/cloudabi32_util.h> + +/* Copies in 32-bit iovec structures from userspace. */ +static int +cloudabi32_copyinuio(const cloudabi32_iovec_t *iovp, size_t iovcnt, + struct uio **uiop) +{ + cloudabi32_iovec_t iovobj; + struct uio *uio; + struct iovec *iov; + size_t i; + int error; + + /* Allocate uio and iovecs. */ + if (iovcnt > UIO_MAXIOV) + return (EINVAL); + uio = malloc(sizeof(struct uio) + iovcnt * sizeof(struct iovec), + M_IOV, M_WAITOK); + iov = (struct iovec *)(uio + 1); + + /* Initialize uio. */ + uio->uio_iov = iov; + uio->uio_iovcnt = iovcnt; + uio->uio_segflg = UIO_USERSPACE; + uio->uio_offset = -1; + uio->uio_resid = 0; + + /* Copy in iovecs. */ + for (i = 0; i < iovcnt; i++) { + error = copyin(&iovp[i], &iovobj, sizeof(iovobj)); + if (error != 0) { + free(uio, M_IOV); + return (error); + } + iov[i].iov_base = TO_PTR(iovobj.buf); + iov[i].iov_len = iovobj.buf_len; + if (iov[i].iov_len > INT32_MAX - uio->uio_resid) { + free(uio, M_IOV); + return (EINVAL); + } + uio->uio_resid += iov[i].iov_len; + } + + *uiop = uio; + return (0); +} + +int +cloudabi32_sys_fd_pread(struct thread *td, + struct cloudabi32_sys_fd_pread_args *uap) +{ + struct uio *uio; + int error; + + error = cloudabi32_copyinuio(uap->iovs, uap->iovs_len, &uio); + if (error != 0) + return (error); + error = kern_preadv(td, uap->fd, uio, uap->offset); + free(uio, M_IOV); + return (error); +} + +int +cloudabi32_sys_fd_pwrite(struct thread *td, + struct cloudabi32_sys_fd_pwrite_args *uap) +{ + struct uio *uio; + int error; + + error = cloudabi32_copyinuio(TO_PTR(uap->iovs), uap->iovs_len, &uio); + if (error != 0) + return (error); + error = kern_pwritev(td, uap->fd, uio, uap->offset); + free(uio, M_IOV); + return (error); +} + +int +cloudabi32_sys_fd_read(struct thread *td, + struct cloudabi32_sys_fd_read_args *uap) +{ + struct uio *uio; + int error; + + error = cloudabi32_copyinuio(uap->iovs, uap->iovs_len, &uio); + if (error != 0) + return (error); + error = kern_readv(td, uap->fd, uio); + free(uio, M_IOV); + return (error); +} + +int +cloudabi32_sys_fd_write(struct thread *td, + struct cloudabi32_sys_fd_write_args *uap) +{ + struct uio *uio; + int error; + + error = cloudabi32_copyinuio(TO_PTR(uap->iovs), uap->iovs_len, &uio); + if (error != 0) + return (error); + error = kern_writev(td, uap->fd, uio); + free(uio, M_IOV); + return (error); +} |