2022-01-30 03:36:32 +01:00
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/*
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* BSD syscalls
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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* Copyright (c) 2013-2014 Stacey D. Son
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* We need the FreeBSD "legacy" definitions. Rust needs the FreeBSD 11 system
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* calls since it doesn't use libc at all, so we have to emulate that despite
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* FreeBSD 11 being EOL'd.
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*/
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#define _WANT_FREEBSD11_STAT
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#define _WANT_FREEBSD11_STATFS
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#define _WANT_FREEBSD11_DIRENT
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#define _WANT_KERNEL_ERRNO
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#define _WANT_SEMUN
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#include "qemu/osdep.h"
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#include "qemu/cutils.h"
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#include "qemu/path.h"
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#include <sys/syscall.h>
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2022-06-14 22:56:30 +02:00
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#include <sys/cdefs.h>
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2022-01-30 03:36:32 +01:00
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#include <sys/param.h>
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2022-06-14 22:39:39 +02:00
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#include <sys/mount.h>
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2022-01-30 03:36:32 +01:00
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#include <sys/sysctl.h>
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#include <utime.h>
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#include "qemu.h"
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#include "signal-common.h"
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#include "user/syscall-trace.h"
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2022-01-31 21:32:41 +01:00
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#include "bsd-file.h"
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2022-02-01 01:03:30 +01:00
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#include "bsd-proc.h"
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2022-01-31 21:32:41 +01:00
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2022-02-01 00:10:10 +01:00
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/* I/O */
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2022-06-12 05:32:19 +02:00
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safe_syscall3(int, open, const char *, path, int, flags, mode_t, mode);
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safe_syscall4(int, openat, int, fd, const char *, path, int, flags, mode_t,
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mode);
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2022-02-01 00:10:10 +01:00
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safe_syscall3(ssize_t, read, int, fd, void *, buf, size_t, nbytes);
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safe_syscall4(ssize_t, pread, int, fd, void *, buf, size_t, nbytes, off_t,
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offset);
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safe_syscall3(ssize_t, readv, int, fd, const struct iovec *, iov, int, iovcnt);
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safe_syscall4(ssize_t, preadv, int, fd, const struct iovec *, iov, int, iovcnt,
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off_t, offset);
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2022-02-01 00:34:03 +01:00
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safe_syscall3(ssize_t, write, int, fd, void *, buf, size_t, nbytes);
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safe_syscall4(ssize_t, pwrite, int, fd, void *, buf, size_t, nbytes, off_t,
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offset);
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safe_syscall3(ssize_t, writev, int, fd, const struct iovec *, iov, int, iovcnt);
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safe_syscall4(ssize_t, pwritev, int, fd, const struct iovec *, iov, int, iovcnt,
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off_t, offset);
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2022-01-30 03:36:32 +01:00
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void target_set_brk(abi_ulong new_brk)
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{
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}
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2022-01-31 21:19:44 +01:00
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/*
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* errno conversion.
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*/
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abi_long get_errno(abi_long ret)
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2022-01-30 03:36:32 +01:00
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{
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2022-01-31 21:19:44 +01:00
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if (ret == -1) {
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return -host_to_target_errno(errno);
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} else {
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return ret;
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}
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}
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2022-01-30 03:36:32 +01:00
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2022-01-31 21:19:44 +01:00
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int host_to_target_errno(int err)
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{
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/*
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* All the BSDs have the property that the error numbers are uniform across
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* all architectures for a given BSD, though they may vary between different
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* BSDs.
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*/
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return err;
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}
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bool is_error(abi_long ret)
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{
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2022-01-30 03:36:32 +01:00
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return (abi_ulong)ret >= (abi_ulong)(-4096);
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}
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2022-01-31 21:37:24 +01:00
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/*
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* Unlocks a iovec. Unlike unlock_iovec, it assumes the tvec array itself is
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* already locked from target_addr. It will be unlocked as well as all the iovec
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* elements.
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*/
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static void helper_unlock_iovec(struct target_iovec *target_vec,
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abi_ulong target_addr, struct iovec *vec,
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int count, int copy)
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{
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for (int i = 0; i < count; i++) {
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abi_ulong base = tswapal(target_vec[i].iov_base);
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if (vec[i].iov_base) {
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unlock_user(vec[i].iov_base, base, copy ? vec[i].iov_len : 0);
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}
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}
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unlock_user(target_vec, target_addr, 0);
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}
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struct iovec *lock_iovec(int type, abi_ulong target_addr,
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int count, int copy)
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{
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struct target_iovec *target_vec;
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struct iovec *vec;
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abi_ulong total_len, max_len;
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int i;
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int err = 0;
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if (count == 0) {
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errno = 0;
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return NULL;
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}
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if (count < 0 || count > IOV_MAX) {
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errno = EINVAL;
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return NULL;
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}
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vec = g_try_new0(struct iovec, count);
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if (vec == NULL) {
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errno = ENOMEM;
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return NULL;
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}
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target_vec = lock_user(VERIFY_READ, target_addr,
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count * sizeof(struct target_iovec), 1);
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if (target_vec == NULL) {
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err = EFAULT;
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goto fail2;
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}
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max_len = 0x7fffffff & MIN(TARGET_PAGE_MASK, PAGE_MASK);
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total_len = 0;
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for (i = 0; i < count; i++) {
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abi_ulong base = tswapal(target_vec[i].iov_base);
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abi_long len = tswapal(target_vec[i].iov_len);
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if (len < 0) {
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err = EINVAL;
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goto fail;
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} else if (len == 0) {
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/* Zero length pointer is ignored. */
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vec[i].iov_base = 0;
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} else {
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vec[i].iov_base = lock_user(type, base, len, copy);
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/*
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* If the first buffer pointer is bad, this is a fault. But
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* subsequent bad buffers will result in a partial write; this is
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* realized by filling the vector with null pointers and zero
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* lengths.
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*/
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if (!vec[i].iov_base) {
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if (i == 0) {
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err = EFAULT;
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goto fail;
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} else {
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/*
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* Fail all the subsequent addresses, they are already
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* zero'd.
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*/
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goto out;
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}
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}
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if (len > max_len - total_len) {
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len = max_len - total_len;
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}
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}
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vec[i].iov_len = len;
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total_len += len;
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}
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out:
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unlock_user(target_vec, target_addr, 0);
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return vec;
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fail:
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helper_unlock_iovec(target_vec, target_addr, vec, i, copy);
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fail2:
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g_free(vec);
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errno = err;
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return NULL;
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}
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2022-01-31 21:40:36 +01:00
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void unlock_iovec(struct iovec *vec, abi_ulong target_addr,
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int count, int copy)
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{
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struct target_iovec *target_vec;
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target_vec = lock_user(VERIFY_READ, target_addr,
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count * sizeof(struct target_iovec), 1);
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if (target_vec) {
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helper_unlock_iovec(target_vec, target_addr, vec, count, copy);
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}
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g_free(vec);
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}
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2022-01-30 03:36:32 +01:00
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/*
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2022-01-31 21:55:12 +01:00
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* All errnos that freebsd_syscall() returns must be -TARGET_<errcode>.
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*/
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static abi_long freebsd_syscall(void *cpu_env, int num, abi_long arg1,
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abi_long arg2, abi_long arg3, abi_long arg4,
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abi_long arg5, abi_long arg6, abi_long arg7,
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abi_long arg8)
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{
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abi_long ret;
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switch (num) {
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2022-02-01 01:03:30 +01:00
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/*
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* process system calls
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*/
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case TARGET_FREEBSD_NR_exit: /* exit(2) */
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ret = do_bsd_exit(cpu_env, arg1);
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break;
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2022-02-01 00:10:10 +01:00
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/*
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* File system calls.
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*/
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case TARGET_FREEBSD_NR_read: /* read(2) */
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ret = do_bsd_read(arg1, arg2, arg3);
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break;
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case TARGET_FREEBSD_NR_pread: /* pread(2) */
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ret = do_bsd_pread(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6);
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break;
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case TARGET_FREEBSD_NR_readv: /* readv(2) */
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ret = do_bsd_readv(arg1, arg2, arg3);
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break;
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case TARGET_FREEBSD_NR_preadv: /* preadv(2) */
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ret = do_bsd_preadv(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6);
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2022-02-01 00:34:03 +01:00
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case TARGET_FREEBSD_NR_write: /* write(2) */
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ret = do_bsd_write(arg1, arg2, arg3);
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break;
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case TARGET_FREEBSD_NR_pwrite: /* pwrite(2) */
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ret = do_bsd_pwrite(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6);
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break;
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case TARGET_FREEBSD_NR_writev: /* writev(2) */
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ret = do_bsd_writev(arg1, arg2, arg3);
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break;
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case TARGET_FREEBSD_NR_pwritev: /* pwritev(2) */
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ret = do_bsd_pwritev(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6);
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2022-02-01 00:10:10 +01:00
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break;
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2022-06-12 05:32:19 +02:00
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case TARGET_FREEBSD_NR_open: /* open(2) */
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ret = do_bsd_open(arg1, arg2, arg3);
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break;
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case TARGET_FREEBSD_NR_openat: /* openat(2) */
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ret = do_bsd_openat(arg1, arg2, arg3, arg4);
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break;
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case TARGET_FREEBSD_NR_close: /* close(2) */
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ret = do_bsd_close(arg1);
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break;
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2022-06-12 16:07:39 +02:00
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case TARGET_FREEBSD_NR_fdatasync: /* fdatasync(2) */
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ret = do_bsd_fdatasync(arg1);
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break;
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case TARGET_FREEBSD_NR_fsync: /* fsync(2) */
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ret = do_bsd_fsync(arg1);
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break;
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case TARGET_FREEBSD_NR_freebsd12_closefrom: /* closefrom(2) */
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ret = do_bsd_closefrom(arg1);
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break;
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2022-06-12 16:11:30 +02:00
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case TARGET_FREEBSD_NR_revoke: /* revoke(2) */
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ret = do_bsd_revoke(arg1);
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break;
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case TARGET_FREEBSD_NR_access: /* access(2) */
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ret = do_bsd_access(arg1, arg2);
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break;
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case TARGET_FREEBSD_NR_eaccess: /* eaccess(2) */
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ret = do_bsd_eaccess(arg1, arg2);
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break;
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case TARGET_FREEBSD_NR_faccessat: /* faccessat(2) */
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ret = do_bsd_faccessat(arg1, arg2, arg3, arg4);
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break;
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|
2022-06-12 16:13:34 +02:00
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case TARGET_FREEBSD_NR_chdir: /* chdir(2) */
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ret = do_bsd_chdir(arg1);
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break;
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case TARGET_FREEBSD_NR_fchdir: /* fchdir(2) */
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ret = do_bsd_fchdir(arg1);
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break;
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|
2022-06-12 16:16:46 +02:00
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case TARGET_FREEBSD_NR_rename: /* rename(2) */
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ret = do_bsd_rename(arg1, arg2);
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break;
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case TARGET_FREEBSD_NR_renameat: /* renameat(2) */
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ret = do_bsd_renameat(arg1, arg2, arg3, arg4);
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break;
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2022-06-12 16:18:48 +02:00
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case TARGET_FREEBSD_NR_link: /* link(2) */
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ret = do_bsd_link(arg1, arg2);
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break;
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case TARGET_FREEBSD_NR_linkat: /* linkat(2) */
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ret = do_bsd_linkat(arg1, arg2, arg3, arg4, arg5);
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break;
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case TARGET_FREEBSD_NR_unlink: /* unlink(2) */
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ret = do_bsd_unlink(arg1);
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break;
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case TARGET_FREEBSD_NR_unlinkat: /* unlinkat(2) */
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ret = do_bsd_unlinkat(arg1, arg2, arg3);
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break;
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2022-06-12 16:21:01 +02:00
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case TARGET_FREEBSD_NR_mkdir: /* mkdir(2) */
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ret = do_bsd_mkdir(arg1, arg2);
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break;
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case TARGET_FREEBSD_NR_mkdirat: /* mkdirat(2) */
|
|
|
|
ret = do_bsd_mkdirat(arg1, arg2, arg3);
|
|
|
|
break;
|
|
|
|
|
2022-06-12 16:23:57 +02:00
|
|
|
case TARGET_FREEBSD_NR_rmdir: /* rmdir(2) (XXX no rmdirat()?) */
|
|
|
|
ret = do_bsd_rmdir(arg1);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case TARGET_FREEBSD_NR___getcwd: /* undocumented __getcwd() */
|
|
|
|
ret = do_bsd___getcwd(arg1, arg2);
|
|
|
|
break;
|
|
|
|
|
2022-06-12 17:27:19 +02:00
|
|
|
case TARGET_FREEBSD_NR_dup: /* dup(2) */
|
|
|
|
ret = do_bsd_dup(arg1);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case TARGET_FREEBSD_NR_dup2: /* dup2(2) */
|
|
|
|
ret = do_bsd_dup2(arg1, arg2);
|
|
|
|
break;
|
|
|
|
|
2022-06-12 17:29:02 +02:00
|
|
|
case TARGET_FREEBSD_NR_truncate: /* truncate(2) */
|
|
|
|
ret = do_bsd_truncate(cpu_env, arg1, arg2, arg3, arg4);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case TARGET_FREEBSD_NR_ftruncate: /* ftruncate(2) */
|
|
|
|
ret = do_bsd_ftruncate(cpu_env, arg1, arg2, arg3, arg4);
|
|
|
|
break;
|
|
|
|
|
2022-06-12 17:31:18 +02:00
|
|
|
case TARGET_FREEBSD_NR_acct: /* acct(2) */
|
|
|
|
ret = do_bsd_acct(arg1);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case TARGET_FREEBSD_NR_sync: /* sync(2) */
|
|
|
|
ret = do_bsd_sync();
|
|
|
|
break;
|
|
|
|
|
2022-06-14 22:39:39 +02:00
|
|
|
case TARGET_FREEBSD_NR_mount: /* mount(2) */
|
|
|
|
ret = do_bsd_mount(arg1, arg2, arg3, arg4);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case TARGET_FREEBSD_NR_unmount: /* unmount(2) */
|
|
|
|
ret = do_bsd_unmount(arg1, arg2);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case TARGET_FREEBSD_NR_nmount: /* nmount(2) */
|
|
|
|
ret = do_bsd_nmount(arg1, arg2, arg3);
|
|
|
|
break;
|
|
|
|
|
2022-06-14 22:44:10 +02:00
|
|
|
case TARGET_FREEBSD_NR_symlink: /* symlink(2) */
|
|
|
|
ret = do_bsd_symlink(arg1, arg2);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case TARGET_FREEBSD_NR_symlinkat: /* symlinkat(2) */
|
|
|
|
ret = do_bsd_symlinkat(arg1, arg2, arg3);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case TARGET_FREEBSD_NR_readlink: /* readlink(2) */
|
|
|
|
ret = do_bsd_readlink(cpu_env, arg1, arg2, arg3);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case TARGET_FREEBSD_NR_readlinkat: /* readlinkat(2) */
|
|
|
|
ret = do_bsd_readlinkat(arg1, arg2, arg3, arg4);
|
|
|
|
break;
|
|
|
|
|
2022-06-14 22:47:45 +02:00
|
|
|
case TARGET_FREEBSD_NR_chmod: /* chmod(2) */
|
|
|
|
ret = do_bsd_chmod(arg1, arg2);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case TARGET_FREEBSD_NR_fchmod: /* fchmod(2) */
|
|
|
|
ret = do_bsd_fchmod(arg1, arg2);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case TARGET_FREEBSD_NR_lchmod: /* lchmod(2) */
|
|
|
|
ret = do_bsd_lchmod(arg1, arg2);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case TARGET_FREEBSD_NR_fchmodat: /* fchmodat(2) */
|
|
|
|
ret = do_bsd_fchmodat(arg1, arg2, arg3, arg4);
|
|
|
|
break;
|
|
|
|
|
2022-06-14 22:56:30 +02:00
|
|
|
case TARGET_FREEBSD_NR_freebsd11_mknod: /* mknod(2) */
|
|
|
|
ret = do_bsd_freebsd11_mknod(arg1, arg2, arg3);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case TARGET_FREEBSD_NR_freebsd11_mknodat: /* mknodat(2) */
|
|
|
|
ret = do_bsd_freebsd11_mknodat(arg1, arg2, arg3, arg4);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case TARGET_FREEBSD_NR_mknodat: /* mknodat(2) */
|
|
|
|
ret = do_bsd_mknodat(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6);
|
|
|
|
break;
|
|
|
|
|
2022-06-14 23:06:59 +02:00
|
|
|
case TARGET_FREEBSD_NR_chown: /* chown(2) */
|
|
|
|
ret = do_bsd_chown(arg1, arg2, arg3);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case TARGET_FREEBSD_NR_fchown: /* fchown(2) */
|
|
|
|
ret = do_bsd_fchown(arg1, arg2, arg3);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case TARGET_FREEBSD_NR_lchown: /* lchown(2) */
|
|
|
|
ret = do_bsd_lchown(arg1, arg2, arg3);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case TARGET_FREEBSD_NR_fchownat: /* fchownat(2) */
|
|
|
|
ret = do_bsd_fchownat(arg1, arg2, arg3, arg4, arg5);
|
|
|
|
break;
|
|
|
|
|
2022-06-14 23:12:33 +02:00
|
|
|
case TARGET_FREEBSD_NR_chflags: /* chflags(2) */
|
|
|
|
ret = do_bsd_chflags(arg1, arg2);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case TARGET_FREEBSD_NR_lchflags: /* lchflags(2) */
|
|
|
|
ret = do_bsd_lchflags(arg1, arg2);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case TARGET_FREEBSD_NR_fchflags: /* fchflags(2) */
|
|
|
|
ret = do_bsd_fchflags(arg1, arg2);
|
|
|
|
break;
|
|
|
|
|
2022-06-16 16:00:53 +02:00
|
|
|
case TARGET_FREEBSD_NR_chroot: /* chroot(2) */
|
|
|
|
ret = do_bsd_chroot(arg1);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case TARGET_FREEBSD_NR_flock: /* flock(2) */
|
|
|
|
ret = do_bsd_flock(arg1, arg2);
|
|
|
|
break;
|
|
|
|
|
2022-06-16 16:02:52 +02:00
|
|
|
case TARGET_FREEBSD_NR_mkfifo: /* mkfifo(2) */
|
|
|
|
ret = do_bsd_mkfifo(arg1, arg2);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case TARGET_FREEBSD_NR_mkfifoat: /* mkfifoat(2) */
|
|
|
|
ret = do_bsd_mkfifoat(arg1, arg2, arg3);
|
|
|
|
break;
|
|
|
|
|
2022-06-16 16:05:10 +02:00
|
|
|
case TARGET_FREEBSD_NR_pathconf: /* pathconf(2) */
|
|
|
|
ret = do_bsd_pathconf(arg1, arg2);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case TARGET_FREEBSD_NR_lpathconf: /* lpathconf(2) */
|
|
|
|
ret = do_bsd_lpathconf(arg1, arg2);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case TARGET_FREEBSD_NR_fpathconf: /* fpathconf(2) */
|
|
|
|
ret = do_bsd_fpathconf(arg1, arg2);
|
|
|
|
break;
|
|
|
|
|
2022-06-16 16:07:52 +02:00
|
|
|
case TARGET_FREEBSD_NR_undelete: /* undelete(2) */
|
|
|
|
ret = do_bsd_undelete(arg1);
|
|
|
|
break;
|
|
|
|
|
2022-01-31 21:55:12 +01:00
|
|
|
default:
|
|
|
|
qemu_log_mask(LOG_UNIMP, "Unsupported syscall: %d\n", num);
|
|
|
|
ret = -TARGET_ENOSYS;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* do_freebsd_syscall() should always have a single exit point at the end so
|
|
|
|
* that actions, such as logging of syscall results, can be performed. This
|
|
|
|
* as a wrapper around freebsd_syscall() so that actually happens. Since
|
|
|
|
* that is a singleton, modern compilers will inline it anyway...
|
2022-01-30 03:36:32 +01:00
|
|
|
*/
|
|
|
|
abi_long do_freebsd_syscall(void *cpu_env, int num, abi_long arg1,
|
|
|
|
abi_long arg2, abi_long arg3, abi_long arg4,
|
|
|
|
abi_long arg5, abi_long arg6, abi_long arg7,
|
|
|
|
abi_long arg8)
|
|
|
|
{
|
2022-01-31 21:55:12 +01:00
|
|
|
CPUState *cpu = env_cpu(cpu_env);
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
trace_guest_user_syscall(cpu, num, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8);
|
|
|
|
if (do_strace) {
|
|
|
|
print_freebsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
|
|
|
|
}
|
|
|
|
|
|
|
|
ret = freebsd_syscall(cpu_env, num, arg1, arg2, arg3, arg4, arg5, arg6,
|
|
|
|
arg7, arg8);
|
|
|
|
if (do_strace) {
|
|
|
|
print_freebsd_syscall_ret(num, ret);
|
|
|
|
}
|
|
|
|
trace_guest_user_syscall_ret(cpu, num, ret);
|
|
|
|
|
|
|
|
return ret;
|
2022-01-30 03:36:32 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
void syscall_init(void)
|
|
|
|
{
|
|
|
|
}
|