| /* |
| * BSD syscalls |
| * |
| * Copyright (c) 2003-2008 Fabrice Bellard |
| * Copyright (c) 2013-2014 Stacey D. Son |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| /* |
| * We need the FreeBSD "legacy" definitions. Rust needs the FreeBSD 11 system |
| * calls since it doesn't use libc at all, so we have to emulate that despite |
| * FreeBSD 11 being EOL'd. |
| */ |
| #define _WANT_FREEBSD11_STAT |
| #define _WANT_FREEBSD11_STATFS |
| #define _WANT_FREEBSD11_DIRENT |
| #define _WANT_KERNEL_ERRNO |
| #define _WANT_SEMUN |
| #include "qemu/osdep.h" |
| #include "qemu/cutils.h" |
| #include "qemu/path.h" |
| #include <sys/syscall.h> |
| #include <sys/cdefs.h> |
| #include <sys/param.h> |
| #include <sys/mount.h> |
| #include <sys/sysctl.h> |
| #include <utime.h> |
| |
| #include "qemu.h" |
| #include "signal-common.h" |
| #include "user/syscall-trace.h" |
| |
| #include "bsd-file.h" |
| #include "bsd-proc.h" |
| |
| /* I/O */ |
| safe_syscall3(int, open, const char *, path, int, flags, mode_t, mode); |
| safe_syscall4(int, openat, int, fd, const char *, path, int, flags, mode_t, |
| mode); |
| |
| safe_syscall3(ssize_t, read, int, fd, void *, buf, size_t, nbytes); |
| safe_syscall4(ssize_t, pread, int, fd, void *, buf, size_t, nbytes, off_t, |
| offset); |
| safe_syscall3(ssize_t, readv, int, fd, const struct iovec *, iov, int, iovcnt); |
| safe_syscall4(ssize_t, preadv, int, fd, const struct iovec *, iov, int, iovcnt, |
| off_t, offset); |
| |
| safe_syscall3(ssize_t, write, int, fd, void *, buf, size_t, nbytes); |
| safe_syscall4(ssize_t, pwrite, int, fd, void *, buf, size_t, nbytes, off_t, |
| offset); |
| safe_syscall3(ssize_t, writev, int, fd, const struct iovec *, iov, int, iovcnt); |
| safe_syscall4(ssize_t, pwritev, int, fd, const struct iovec *, iov, int, iovcnt, |
| off_t, offset); |
| |
| void target_set_brk(abi_ulong new_brk) |
| { |
| } |
| |
| /* |
| * errno conversion. |
| */ |
| abi_long get_errno(abi_long ret) |
| { |
| if (ret == -1) { |
| return -host_to_target_errno(errno); |
| } else { |
| return ret; |
| } |
| } |
| |
| int host_to_target_errno(int err) |
| { |
| /* |
| * All the BSDs have the property that the error numbers are uniform across |
| * all architectures for a given BSD, though they may vary between different |
| * BSDs. |
| */ |
| return err; |
| } |
| |
| bool is_error(abi_long ret) |
| { |
| return (abi_ulong)ret >= (abi_ulong)(-4096); |
| } |
| |
| /* |
| * Unlocks a iovec. Unlike unlock_iovec, it assumes the tvec array itself is |
| * already locked from target_addr. It will be unlocked as well as all the iovec |
| * elements. |
| */ |
| static void helper_unlock_iovec(struct target_iovec *target_vec, |
| abi_ulong target_addr, struct iovec *vec, |
| int count, int copy) |
| { |
| for (int i = 0; i < count; i++) { |
| abi_ulong base = tswapal(target_vec[i].iov_base); |
| |
| if (vec[i].iov_base) { |
| unlock_user(vec[i].iov_base, base, copy ? vec[i].iov_len : 0); |
| } |
| } |
| unlock_user(target_vec, target_addr, 0); |
| } |
| |
| struct iovec *lock_iovec(int type, abi_ulong target_addr, |
| int count, int copy) |
| { |
| struct target_iovec *target_vec; |
| struct iovec *vec; |
| abi_ulong total_len, max_len; |
| int i; |
| int err = 0; |
| |
| if (count == 0) { |
| errno = 0; |
| return NULL; |
| } |
| if (count < 0 || count > IOV_MAX) { |
| errno = EINVAL; |
| return NULL; |
| } |
| |
| vec = g_try_new0(struct iovec, count); |
| if (vec == NULL) { |
| errno = ENOMEM; |
| return NULL; |
| } |
| |
| target_vec = lock_user(VERIFY_READ, target_addr, |
| count * sizeof(struct target_iovec), 1); |
| if (target_vec == NULL) { |
| err = EFAULT; |
| goto fail2; |
| } |
| |
| max_len = 0x7fffffff & MIN(TARGET_PAGE_MASK, PAGE_MASK); |
| total_len = 0; |
| |
| for (i = 0; i < count; i++) { |
| abi_ulong base = tswapal(target_vec[i].iov_base); |
| abi_long len = tswapal(target_vec[i].iov_len); |
| |
| if (len < 0) { |
| err = EINVAL; |
| goto fail; |
| } else if (len == 0) { |
| /* Zero length pointer is ignored. */ |
| vec[i].iov_base = 0; |
| } else { |
| vec[i].iov_base = lock_user(type, base, len, copy); |
| /* |
| * If the first buffer pointer is bad, this is a fault. But |
| * subsequent bad buffers will result in a partial write; this is |
| * realized by filling the vector with null pointers and zero |
| * lengths. |
| */ |
| if (!vec[i].iov_base) { |
| if (i == 0) { |
| err = EFAULT; |
| goto fail; |
| } else { |
| /* |
| * Fail all the subsequent addresses, they are already |
| * zero'd. |
| */ |
| goto out; |
| } |
| } |
| if (len > max_len - total_len) { |
| len = max_len - total_len; |
| } |
| } |
| vec[i].iov_len = len; |
| total_len += len; |
| } |
| out: |
| unlock_user(target_vec, target_addr, 0); |
| return vec; |
| |
| fail: |
| helper_unlock_iovec(target_vec, target_addr, vec, i, copy); |
| fail2: |
| g_free(vec); |
| errno = err; |
| return NULL; |
| } |
| |
| void unlock_iovec(struct iovec *vec, abi_ulong target_addr, |
| int count, int copy) |
| { |
| struct target_iovec *target_vec; |
| |
| target_vec = lock_user(VERIFY_READ, target_addr, |
| count * sizeof(struct target_iovec), 1); |
| if (target_vec) { |
| helper_unlock_iovec(target_vec, target_addr, vec, count, copy); |
| } |
| |
| g_free(vec); |
| } |
| |
| /* |
| * All errnos that freebsd_syscall() returns must be -TARGET_<errcode>. |
| */ |
| static abi_long 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) |
| { |
| abi_long ret; |
| |
| switch (num) { |
| /* |
| * process system calls |
| */ |
| case TARGET_FREEBSD_NR_exit: /* exit(2) */ |
| ret = do_bsd_exit(cpu_env, arg1); |
| break; |
| |
| /* |
| * File system calls. |
| */ |
| case TARGET_FREEBSD_NR_read: /* read(2) */ |
| ret = do_bsd_read(arg1, arg2, arg3); |
| break; |
| |
| case TARGET_FREEBSD_NR_pread: /* pread(2) */ |
| ret = do_bsd_pread(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6); |
| break; |
| |
| case TARGET_FREEBSD_NR_readv: /* readv(2) */ |
| ret = do_bsd_readv(arg1, arg2, arg3); |
| break; |
| |
| case TARGET_FREEBSD_NR_preadv: /* preadv(2) */ |
| ret = do_bsd_preadv(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6); |
| |
| case TARGET_FREEBSD_NR_write: /* write(2) */ |
| ret = do_bsd_write(arg1, arg2, arg3); |
| break; |
| |
| case TARGET_FREEBSD_NR_pwrite: /* pwrite(2) */ |
| ret = do_bsd_pwrite(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6); |
| break; |
| |
| case TARGET_FREEBSD_NR_writev: /* writev(2) */ |
| ret = do_bsd_writev(arg1, arg2, arg3); |
| break; |
| |
| case TARGET_FREEBSD_NR_pwritev: /* pwritev(2) */ |
| ret = do_bsd_pwritev(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6); |
| break; |
| |
| case TARGET_FREEBSD_NR_open: /* open(2) */ |
| ret = do_bsd_open(arg1, arg2, arg3); |
| break; |
| |
| case TARGET_FREEBSD_NR_openat: /* openat(2) */ |
| ret = do_bsd_openat(arg1, arg2, arg3, arg4); |
| break; |
| |
| case TARGET_FREEBSD_NR_close: /* close(2) */ |
| ret = do_bsd_close(arg1); |
| break; |
| |
| case TARGET_FREEBSD_NR_fdatasync: /* fdatasync(2) */ |
| ret = do_bsd_fdatasync(arg1); |
| break; |
| |
| case TARGET_FREEBSD_NR_fsync: /* fsync(2) */ |
| ret = do_bsd_fsync(arg1); |
| break; |
| |
| case TARGET_FREEBSD_NR_freebsd12_closefrom: /* closefrom(2) */ |
| ret = do_bsd_closefrom(arg1); |
| break; |
| |
| case TARGET_FREEBSD_NR_revoke: /* revoke(2) */ |
| ret = do_bsd_revoke(arg1); |
| break; |
| |
| case TARGET_FREEBSD_NR_access: /* access(2) */ |
| ret = do_bsd_access(arg1, arg2); |
| break; |
| |
| case TARGET_FREEBSD_NR_eaccess: /* eaccess(2) */ |
| ret = do_bsd_eaccess(arg1, arg2); |
| break; |
| |
| case TARGET_FREEBSD_NR_faccessat: /* faccessat(2) */ |
| ret = do_bsd_faccessat(arg1, arg2, arg3, arg4); |
| break; |
| |
| case TARGET_FREEBSD_NR_chdir: /* chdir(2) */ |
| ret = do_bsd_chdir(arg1); |
| break; |
| |
| case TARGET_FREEBSD_NR_fchdir: /* fchdir(2) */ |
| ret = do_bsd_fchdir(arg1); |
| break; |
| |
| case TARGET_FREEBSD_NR_rename: /* rename(2) */ |
| ret = do_bsd_rename(arg1, arg2); |
| break; |
| |
| case TARGET_FREEBSD_NR_renameat: /* renameat(2) */ |
| ret = do_bsd_renameat(arg1, arg2, arg3, arg4); |
| break; |
| |
| case TARGET_FREEBSD_NR_link: /* link(2) */ |
| ret = do_bsd_link(arg1, arg2); |
| break; |
| |
| case TARGET_FREEBSD_NR_linkat: /* linkat(2) */ |
| ret = do_bsd_linkat(arg1, arg2, arg3, arg4, arg5); |
| break; |
| |
| case TARGET_FREEBSD_NR_unlink: /* unlink(2) */ |
| ret = do_bsd_unlink(arg1); |
| break; |
| |
| case TARGET_FREEBSD_NR_unlinkat: /* unlinkat(2) */ |
| ret = do_bsd_unlinkat(arg1, arg2, arg3); |
| break; |
| |
| case TARGET_FREEBSD_NR_mkdir: /* mkdir(2) */ |
| ret = do_bsd_mkdir(arg1, arg2); |
| break; |
| |
| case TARGET_FREEBSD_NR_mkdirat: /* mkdirat(2) */ |
| ret = do_bsd_mkdirat(arg1, arg2, arg3); |
| break; |
| |
| 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; |
| |
| 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; |
| |
| 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; |
| |
| 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; |
| |
| 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; |
| |
| 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; |
| |
| 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; |
| |
| 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; |
| |
| 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; |
| |
| 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; |
| |
| 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; |
| |
| 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; |
| |
| 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; |
| |
| case TARGET_FREEBSD_NR_undelete: /* undelete(2) */ |
| ret = do_bsd_undelete(arg1); |
| break; |
| |
| 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... |
| */ |
| 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) |
| { |
| 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; |
| } |
| |
| void syscall_init(void) |
| { |
| } |
