[mirror_qemu.git] / bsd-user / freebsd / os-syscall.c

/*
 *  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/>.
 */
#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 "include/gdbstub/syscalls.h"

#include "qemu.h"
#include "signal-common.h"
#include "user/syscall-trace.h"

#include "bsd-file.h"
#include "bsd-proc.h"

/* *BSD dependent syscall shims */
#include "os-stat.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;

        /*
         * stat system calls
         */
    case TARGET_FREEBSD_NR_freebsd11_stat: /* stat(2) */
        ret = do_freebsd11_stat(arg1, arg2);
        break;

    case TARGET_FREEBSD_NR_freebsd11_lstat: /* lstat(2) */
        ret = do_freebsd11_lstat(arg1, arg2);
        break;

    case TARGET_FREEBSD_NR_freebsd11_fstat: /* fstat(2) */
        ret = do_freebsd11_fstat(arg1, arg2);
        break;

    case TARGET_FREEBSD_NR_fstat: /* fstat(2) */
        ret = do_freebsd_fstat(arg1, arg2);
        break;

    case TARGET_FREEBSD_NR_freebsd11_fstatat: /* fstatat(2) */
        ret = do_freebsd11_fstatat(arg1, arg2, arg3, arg4);
        break;

    case TARGET_FREEBSD_NR_fstatat: /* fstatat(2) */
        ret = do_freebsd_fstatat(arg1, arg2, arg3, arg4);
        break;

    case TARGET_FREEBSD_NR_freebsd11_nstat: /* undocumented */
        ret = do_freebsd11_nstat(arg1, arg2);
        break;

    case TARGET_FREEBSD_NR_freebsd11_nfstat: /* undocumented */
        ret = do_freebsd11_nfstat(arg1, arg2);
        break;

    case TARGET_FREEBSD_NR_freebsd11_nlstat: /* undocumented */
        ret = do_freebsd11_nlstat(arg1, arg2);
        break;

    case TARGET_FREEBSD_NR_getfh: /* getfh(2) */
        ret = do_freebsd_getfh(arg1, arg2);
        break;

    case TARGET_FREEBSD_NR_lgetfh: /* lgetfh(2) */
        ret = do_freebsd_lgetfh(arg1, arg2);
        break;

    case TARGET_FREEBSD_NR_fhopen: /* fhopen(2) */
        ret = do_freebsd_fhopen(arg1, arg2);
        break;

    case TARGET_FREEBSD_NR_freebsd11_fhstat: /* fhstat(2) */
        ret = do_freebsd11_fhstat(arg1, arg2);
        break;

    case TARGET_FREEBSD_NR_fhstat: /* fhstat(2) */
        ret = do_freebsd_fhstat(arg1, arg2);
        break;

    case TARGET_FREEBSD_NR_freebsd11_fhstatfs: /* fhstatfs(2) */
        ret = do_freebsd11_fhstatfs(arg1, arg2);
        break;

    case TARGET_FREEBSD_NR_fhstatfs: /* fhstatfs(2) */
        ret = do_freebsd_fhstatfs(arg1, arg2);
        break;

    case TARGET_FREEBSD_NR_freebsd11_statfs: /* statfs(2) */
        ret = do_freebsd11_statfs(arg1, arg2);
        break;

    case TARGET_FREEBSD_NR_statfs: /* statfs(2) */
        ret = do_freebsd_statfs(arg1, arg2);
        break;

    case TARGET_FREEBSD_NR_freebsd11_fstatfs: /* fstatfs(2) */
        ret = do_freebsd11_fstatfs(arg1, arg2);
        break;

    case TARGET_FREEBSD_NR_fstatfs: /* fstatfs(2) */
        ret = do_freebsd_fstatfs(arg1, arg2);
        break;

    case TARGET_FREEBSD_NR_freebsd11_getfsstat: /* getfsstat(2) */
        ret = do_freebsd11_getfsstat(arg1, arg2, arg3);
        break;

    case TARGET_FREEBSD_NR_getfsstat: /* getfsstat(2) */
        ret = do_freebsd_getfsstat(arg1, arg2, arg3);
        break;

        /*
         * sys{ctl, arch, call}
         */
    case TARGET_FREEBSD_NR___sysctl: /* sysctl(3) */
        ret = do_freebsd_sysctl(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6);
        break;

    case TARGET_FREEBSD_NR___sysctlbyname: /* sysctlbyname(2) */
        ret = do_freebsd_sysctlbyname(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6);
        break;

    case TARGET_FREEBSD_NR_sysarch: /* sysarch(2) */
        ret = do_freebsd_sysarch(cpu_env, arg1, arg2);
        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)
{
    abi_long ret;

    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);
    }

    return ret;
}

void syscall_init(void)
{
}
Commit	Line	Data
66eed099 WL	1	/*
	2	* BSD syscalls
	3	*
	4	* Copyright (c) 2003-2008 Fabrice Bellard
	5	* Copyright (c) 2013-2014 Stacey D. Son
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, see <http://www.gnu.org/licenses/>.
	19	*/
66eed099 WL	20	#include "qemu/osdep.h"
	21	#include "qemu/cutils.h"
	22	#include "qemu/path.h"
	23	#include <sys/syscall.h>
79cfae0c	24	#include <sys/cdefs.h>
66eed099	25	#include <sys/param.h>
af2ae2e8	26	#include <sys/mount.h>
66eed099 WL	27	#include <sys/sysctl.h>
	28	#include <utime.h>
	29
c566080c AB	30	#include "include/gdbstub/syscalls.h"
c566080c AB	31
66eed099	32	#include "qemu.h"
66eed099 WL	33	#include "signal-common.h"
	34	#include "user/syscall-trace.h"
	35
c5c84d16	36	#include "bsd-file.h"
9554d330	37	#include "bsd-proc.h"
c5c84d16	38
e800e6c5 WL	39	/* BSD dependent syscall shims /
	40	#include "os-stat.h"
	41
80da1b00	42	/* I/O */
77d3522b WL	43	safe_syscall3(int, open, const char *, path, int, flags, mode_t, mode);
	44	safe_syscall4(int, openat, int, fd, const char *, path, int, flags, mode_t,
	45	mode);
	46
80da1b00 WL	47	safe_syscall3(ssize_t, read, int, fd, void *, buf, size_t, nbytes);
	48	safe_syscall4(ssize_t, pread, int, fd, void *, buf, size_t, nbytes, off_t,
	49	offset);
	50	safe_syscall3(ssize_t, readv, int, fd, const struct iovec *, iov, int, iovcnt);
	51	safe_syscall4(ssize_t, preadv, int, fd, const struct iovec *, iov, int, iovcnt,
	52	off_t, offset);
	53
770d8aba WL	54	safe_syscall3(ssize_t, write, int, fd, void *, buf, size_t, nbytes);
	55	safe_syscall4(ssize_t, pwrite, int, fd, void *, buf, size_t, nbytes, off_t,
	56	offset);
	57	safe_syscall3(ssize_t, writev, int, fd, const struct iovec *, iov, int, iovcnt);
	58	safe_syscall4(ssize_t, pwritev, int, fd, const struct iovec *, iov, int, iovcnt,
	59	off_t, offset);
	60
66eed099 WL	61	void target_set_brk(abi_ulong new_brk)
	62	{
	63	}
	64
deeff83b WL	65	/*
	66	* errno conversion.
	67	*/
	68	abi_long get_errno(abi_long ret)
66eed099	69	{
deeff83b WL	70	if (ret == -1) {
	71	return -host_to_target_errno(errno);
	72	} else {
	73	return ret;
	74	}
	75	}
66eed099	76
deeff83b WL	77	int host_to_target_errno(int err)
	78	{
	79	/*
	80	* All the BSDs have the property that the error numbers are uniform across
	81	* all architectures for a given BSD, though they may vary between different
	82	* BSDs.
	83	*/
	84	return err;
	85	}
	86
	87	bool is_error(abi_long ret)
	88	{
66eed099 WL	89	return (abi_ulong)ret >= (abi_ulong)(-4096);
	90	}
	91
1ed771b2 WL	92	/*
	93	* Unlocks a iovec. Unlike unlock_iovec, it assumes the tvec array itself is
	94	* already locked from target_addr. It will be unlocked as well as all the iovec
	95	* elements.
	96	*/
	97	static void helper_unlock_iovec(struct target_iovec *target_vec,
	98	abi_ulong target_addr, struct iovec *vec,
	99	int count, int copy)
	100	{
	101	for (int i = 0; i < count; i++) {
	102	abi_ulong base = tswapal(target_vec[i].iov_base);
	103
	104	if (vec[i].iov_base) {
	105	unlock_user(vec[i].iov_base, base, copy ? vec[i].iov_len : 0);
	106	}
	107	}
	108	unlock_user(target_vec, target_addr, 0);
	109	}
	110
	111	struct iovec *lock_iovec(int type, abi_ulong target_addr,
	112	int count, int copy)
	113	{
	114	struct target_iovec *target_vec;
	115	struct iovec *vec;
	116	abi_ulong total_len, max_len;
	117	int i;
	118	int err = 0;
	119
	120	if (count == 0) {
	121	errno = 0;
	122	return NULL;
	123	}
	124	if (count < 0 \|\| count > IOV_MAX) {
	125	errno = EINVAL;
	126	return NULL;
	127	}
	128
	129	vec = g_try_new0(struct iovec, count);
	130	if (vec == NULL) {
	131	errno = ENOMEM;
	132	return NULL;
	133	}
	134
	135	target_vec = lock_user(VERIFY_READ, target_addr,
	136	count * sizeof(struct target_iovec), 1);
	137	if (target_vec == NULL) {
	138	err = EFAULT;
	139	goto fail2;
	140	}
	141
	142	max_len = 0x7fffffff & MIN(TARGET_PAGE_MASK, PAGE_MASK);
	143	total_len = 0;
	144
	145	for (i = 0; i < count; i++) {
	146	abi_ulong base = tswapal(target_vec[i].iov_base);
	147	abi_long len = tswapal(target_vec[i].iov_len);
	148
	149	if (len < 0) {
	150	err = EINVAL;
	151	goto fail;
	152	} else if (len == 0) {
	153	/* Zero length pointer is ignored. */
	154	vec[i].iov_base = 0;
	155	} else {
156	vec[i].iov_base = lock_user(type, base, len, copy);
157	/*
158	* If the first buffer pointer is bad, this is a fault. But
159	* subsequent bad buffers will result in a partial write; this is
160	* realized by filling the vector with null pointers and zero
161	* lengths.
162	*/
163	if (!vec[i].iov_base) {
164	if (i == 0) {
165	err = EFAULT;
166	goto fail;
167	} else {
168	/*
169	* Fail all the subsequent addresses, they are already
170	* zero'd.
171	*/
172	goto out;
173	}
174	}
175	if (len > max_len - total_len) {
176	len = max_len - total_len;
177	}
178	}
179	vec[i].iov_len = len;
180	total_len += len;
181	}
182	out:
183	unlock_user(target_vec, target_addr, 0);
184	return vec;
185
186	fail:
187	helper_unlock_iovec(target_vec, target_addr, vec, i, copy);
188	fail2:
189	g_free(vec);
190	errno = err;
191	return NULL;
192	}
193
883808d8 WL	194	void unlock_iovec(struct iovec *vec, abi_ulong target_addr,
	195	int count, int copy)
	196	{
	197	struct target_iovec *target_vec;
	198
	199	target_vec = lock_user(VERIFY_READ, target_addr,
	200	count * sizeof(struct target_iovec), 1);
	201	if (target_vec) {
	202	helper_unlock_iovec(target_vec, target_addr, vec, count, copy);
	203	}
	204
	205	g_free(vec);
	206	}
	207
66eed099	208	/*
db697887 WL	209	* All errnos that freebsd_syscall() returns must be -TARGET_<errcode>.
	210	*/
	211	static abi_long freebsd_syscall(void *cpu_env, int num, abi_long arg1,
	212	abi_long arg2, abi_long arg3, abi_long arg4,
	213	abi_long arg5, abi_long arg6, abi_long arg7,
	214	abi_long arg8)
	215	{
	216	abi_long ret;
	217
	218	switch (num) {
9554d330 WL	219	/*
	220	* process system calls
	221	*/
	222	case TARGET_FREEBSD_NR_exit: /* exit(2) */
	223	ret = do_bsd_exit(cpu_env, arg1);
	224	break;
80da1b00 WL	225
	226	/*
	227	* File system calls.
	228	*/
	229	case TARGET_FREEBSD_NR_read: /* read(2) */
	230	ret = do_bsd_read(arg1, arg2, arg3);
	231	break;
	232
	233	case TARGET_FREEBSD_NR_pread: /* pread(2) */
	234	ret = do_bsd_pread(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6);
	235	break;
	236
	237	case TARGET_FREEBSD_NR_readv: /* readv(2) */
	238	ret = do_bsd_readv(arg1, arg2, arg3);
	239	break;
	240
	241	case TARGET_FREEBSD_NR_preadv: /* preadv(2) */
	242	ret = do_bsd_preadv(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6);
770d8aba WL	243
	244	case TARGET_FREEBSD_NR_write: /* write(2) */
	245	ret = do_bsd_write(arg1, arg2, arg3);
	246	break;
	247
	248	case TARGET_FREEBSD_NR_pwrite: /* pwrite(2) */
	249	ret = do_bsd_pwrite(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6);
	250	break;
	251
	252	case TARGET_FREEBSD_NR_writev: /* writev(2) */
	253	ret = do_bsd_writev(arg1, arg2, arg3);
	254	break;
	255
	256	case TARGET_FREEBSD_NR_pwritev: /* pwritev(2) */
	257	ret = do_bsd_pwritev(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6);
80da1b00 WL	258	break;
80da1b00 WL	259
77d3522b WL	260	case TARGET_FREEBSD_NR_open: /* open(2) */
	261	ret = do_bsd_open(arg1, arg2, arg3);
	262	break;
	263
	264	case TARGET_FREEBSD_NR_openat: /* openat(2) */
	265	ret = do_bsd_openat(arg1, arg2, arg3, arg4);
	266	break;
	267
	268	case TARGET_FREEBSD_NR_close: /* close(2) */
	269	ret = do_bsd_close(arg1);
	270	break;
	271
a2ba6c7b WL	272	case TARGET_FREEBSD_NR_fdatasync: /* fdatasync(2) */
	273	ret = do_bsd_fdatasync(arg1);
	274	break;
	275
	276	case TARGET_FREEBSD_NR_fsync: /* fsync(2) */
	277	ret = do_bsd_fsync(arg1);
	278	break;
	279
	280	case TARGET_FREEBSD_NR_freebsd12_closefrom: /* closefrom(2) */
	281	ret = do_bsd_closefrom(arg1);
	282	break;
	283
65c6c4c8 WL	284	case TARGET_FREEBSD_NR_revoke: /* revoke(2) */
	285	ret = do_bsd_revoke(arg1);
	286	break;
	287
	288	case TARGET_FREEBSD_NR_access: /* access(2) */
	289	ret = do_bsd_access(arg1, arg2);
	290	break;
	291
	292	case TARGET_FREEBSD_NR_eaccess: /* eaccess(2) */
	293	ret = do_bsd_eaccess(arg1, arg2);
	294	break;
	295
	296	case TARGET_FREEBSD_NR_faccessat: /* faccessat(2) */
	297	ret = do_bsd_faccessat(arg1, arg2, arg3, arg4);
	298	break;
	299
390f547e WL	300	case TARGET_FREEBSD_NR_chdir: /* chdir(2) */
	301	ret = do_bsd_chdir(arg1);
	302	break;
	303
	304	case TARGET_FREEBSD_NR_fchdir: /* fchdir(2) */
	305	ret = do_bsd_fchdir(arg1);
	306	break;
	307
ab5fd2d9 WL	308	case TARGET_FREEBSD_NR_rename: /* rename(2) */
	309	ret = do_bsd_rename(arg1, arg2);
	310	break;
	311
	312	case TARGET_FREEBSD_NR_renameat: /* renameat(2) */
	313	ret = do_bsd_renameat(arg1, arg2, arg3, arg4);
	314	break;
	315
2d3b7e01 WL	316	case TARGET_FREEBSD_NR_link: /* link(2) */
	317	ret = do_bsd_link(arg1, arg2);
	318	break;
	319
	320	case TARGET_FREEBSD_NR_linkat: /* linkat(2) */
	321	ret = do_bsd_linkat(arg1, arg2, arg3, arg4, arg5);
	322	break;
	323
	324	case TARGET_FREEBSD_NR_unlink: /* unlink(2) */
	325	ret = do_bsd_unlink(arg1);
	326	break;
	327
	328	case TARGET_FREEBSD_NR_unlinkat: /* unlinkat(2) */
	329	ret = do_bsd_unlinkat(arg1, arg2, arg3);
	330	break;
	331
1ffbd5e7 WL	332	case TARGET_FREEBSD_NR_mkdir: /* mkdir(2) */
	333	ret = do_bsd_mkdir(arg1, arg2);
	334	break;
	335
	336	case TARGET_FREEBSD_NR_mkdirat: /* mkdirat(2) */
	337	ret = do_bsd_mkdirat(arg1, arg2, arg3);
	338	break;
	339
6af8f76a WL	340	case TARGET_FREEBSD_NR_rmdir: /* rmdir(2) (XXX no rmdirat()?) */
	341	ret = do_bsd_rmdir(arg1);
	342	break;
	343
	344	case TARGET_FREEBSD_NR___getcwd: /* undocumented __getcwd() */
	345	ret = do_bsd___getcwd(arg1, arg2);
	346	break;
	347
a15699ac WL	348	case TARGET_FREEBSD_NR_dup: /* dup(2) */
	349	ret = do_bsd_dup(arg1);
	350	break;
	351
	352	case TARGET_FREEBSD_NR_dup2: /* dup2(2) */
	353	ret = do_bsd_dup2(arg1, arg2);
	354	break;
	355
4b795b14 WL	356	case TARGET_FREEBSD_NR_truncate: /* truncate(2) */
	357	ret = do_bsd_truncate(cpu_env, arg1, arg2, arg3, arg4);
	358	break;
	359
	360	case TARGET_FREEBSD_NR_ftruncate: /* ftruncate(2) */
	361	ret = do_bsd_ftruncate(cpu_env, arg1, arg2, arg3, arg4);
	362	break;
	363
d35020ed WL	364	case TARGET_FREEBSD_NR_acct: /* acct(2) */
	365	ret = do_bsd_acct(arg1);
	366	break;
	367
	368	case TARGET_FREEBSD_NR_sync: /* sync(2) */
	369	ret = do_bsd_sync();
	370	break;
	371
af2ae2e8 WL	372	case TARGET_FREEBSD_NR_mount: /* mount(2) */
	373	ret = do_bsd_mount(arg1, arg2, arg3, arg4);
	374	break;
	375
	376	case TARGET_FREEBSD_NR_unmount: /* unmount(2) */
	377	ret = do_bsd_unmount(arg1, arg2);
	378	break;
	379
	380	case TARGET_FREEBSD_NR_nmount: /* nmount(2) */
	381	ret = do_bsd_nmount(arg1, arg2, arg3);
	382	break;
	383
c7b62b4a WL	384	case TARGET_FREEBSD_NR_symlink: /* symlink(2) */
	385	ret = do_bsd_symlink(arg1, arg2);
	386	break;
	387
	388	case TARGET_FREEBSD_NR_symlinkat: /* symlinkat(2) */
	389	ret = do_bsd_symlinkat(arg1, arg2, arg3);
	390	break;
	391
	392	case TARGET_FREEBSD_NR_readlink: /* readlink(2) */
	393	ret = do_bsd_readlink(cpu_env, arg1, arg2, arg3);
	394	break;
	395
	396	case TARGET_FREEBSD_NR_readlinkat: /* readlinkat(2) */
	397	ret = do_bsd_readlinkat(arg1, arg2, arg3, arg4);
	398	break;
	399
0db0db8f WL	400	case TARGET_FREEBSD_NR_chmod: /* chmod(2) */
	401	ret = do_bsd_chmod(arg1, arg2);
	402	break;
	403
	404	case TARGET_FREEBSD_NR_fchmod: /* fchmod(2) */
	405	ret = do_bsd_fchmod(arg1, arg2);
	406	break;
	407
	408	case TARGET_FREEBSD_NR_lchmod: /* lchmod(2) */
	409	ret = do_bsd_lchmod(arg1, arg2);
	410	break;
	411
	412	case TARGET_FREEBSD_NR_fchmodat: /* fchmodat(2) */
	413	ret = do_bsd_fchmodat(arg1, arg2, arg3, arg4);
	414	break;
	415
79cfae0c WL	416	case TARGET_FREEBSD_NR_freebsd11_mknod: /* mknod(2) */
	417	ret = do_bsd_freebsd11_mknod(arg1, arg2, arg3);
	418	break;
	419
	420	case TARGET_FREEBSD_NR_freebsd11_mknodat: /* mknodat(2) */
	421	ret = do_bsd_freebsd11_mknodat(arg1, arg2, arg3, arg4);
	422	break;
	423
	424	case TARGET_FREEBSD_NR_mknodat: /* mknodat(2) */
	425	ret = do_bsd_mknodat(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6);
	426	break;
	427
58af3e29 WL	428	case TARGET_FREEBSD_NR_chown: /* chown(2) */
	429	ret = do_bsd_chown(arg1, arg2, arg3);
	430	break;
	431
	432	case TARGET_FREEBSD_NR_fchown: /* fchown(2) */
	433	ret = do_bsd_fchown(arg1, arg2, arg3);
	434	break;
	435
	436	case TARGET_FREEBSD_NR_lchown: /* lchown(2) */
	437	ret = do_bsd_lchown(arg1, arg2, arg3);
	438	break;
	439
	440	case TARGET_FREEBSD_NR_fchownat: /* fchownat(2) */
	441	ret = do_bsd_fchownat(arg1, arg2, arg3, arg4, arg5);
	442	break;
	443
c6f0a7d9 WL	444	case TARGET_FREEBSD_NR_chflags: /* chflags(2) */
	445	ret = do_bsd_chflags(arg1, arg2);
	446	break;
	447
	448	case TARGET_FREEBSD_NR_lchflags: /* lchflags(2) */
	449	ret = do_bsd_lchflags(arg1, arg2);
	450	break;
	451
	452	case TARGET_FREEBSD_NR_fchflags: /* fchflags(2) */
	453	ret = do_bsd_fchflags(arg1, arg2);
	454	break;
	455
17a4d13c WL	456	case TARGET_FREEBSD_NR_chroot: /* chroot(2) */
	457	ret = do_bsd_chroot(arg1);
	458	break;
	459
	460	case TARGET_FREEBSD_NR_flock: /* flock(2) */
	461	ret = do_bsd_flock(arg1, arg2);
	462	break;
	463
5fbd8011 WL	464	case TARGET_FREEBSD_NR_mkfifo: /* mkfifo(2) */
	465	ret = do_bsd_mkfifo(arg1, arg2);
	466	break;
	467
	468	case TARGET_FREEBSD_NR_mkfifoat: /* mkfifoat(2) */
	469	ret = do_bsd_mkfifoat(arg1, arg2, arg3);
	470	break;
	471
d3f29dda WL	472	case TARGET_FREEBSD_NR_pathconf: /* pathconf(2) */
	473	ret = do_bsd_pathconf(arg1, arg2);
	474	break;
	475
	476	case TARGET_FREEBSD_NR_lpathconf: /* lpathconf(2) */
	477	ret = do_bsd_lpathconf(arg1, arg2);
	478	break;
	479
	480	case TARGET_FREEBSD_NR_fpathconf: /* fpathconf(2) */
	481	ret = do_bsd_fpathconf(arg1, arg2);
	482	break;
	483
952d5d30 WL	484	case TARGET_FREEBSD_NR_undelete: /* undelete(2) */
	485	ret = do_bsd_undelete(arg1);
	486	break;
	487
e800e6c5 WL	488	/*
	489	* stat system calls
	490	*/
	491	case TARGET_FREEBSD_NR_freebsd11_stat: /* stat(2) */
	492	ret = do_freebsd11_stat(arg1, arg2);
	493	break;
	494
	495	case TARGET_FREEBSD_NR_freebsd11_lstat: /* lstat(2) */
	496	ret = do_freebsd11_lstat(arg1, arg2);
	497	break;
	498
	499	case TARGET_FREEBSD_NR_freebsd11_fstat: /* fstat(2) */
	500	ret = do_freebsd11_fstat(arg1, arg2);
	501	break;
	502
	503	case TARGET_FREEBSD_NR_fstat: /* fstat(2) */
	504	ret = do_freebsd_fstat(arg1, arg2);
	505	break;
	506
	507	case TARGET_FREEBSD_NR_freebsd11_fstatat: /* fstatat(2) */
	508	ret = do_freebsd11_fstatat(arg1, arg2, arg3, arg4);
	509	break;
	510
	511	case TARGET_FREEBSD_NR_fstatat: /* fstatat(2) */
	512	ret = do_freebsd_fstatat(arg1, arg2, arg3, arg4);
	513	break;
	514
	515	case TARGET_FREEBSD_NR_freebsd11_nstat: /* undocumented */
	516	ret = do_freebsd11_nstat(arg1, arg2);
	517	break;
	518
	519	case TARGET_FREEBSD_NR_freebsd11_nfstat: /* undocumented */
	520	ret = do_freebsd11_nfstat(arg1, arg2);
	521	break;
	522
	523	case TARGET_FREEBSD_NR_freebsd11_nlstat: /* undocumented */
	524	ret = do_freebsd11_nlstat(arg1, arg2);
	525	break;
	526
6fe97c6c WL	527	case TARGET_FREEBSD_NR_getfh: /* getfh(2) */
	528	ret = do_freebsd_getfh(arg1, arg2);
	529	break;
	530
	531	case TARGET_FREEBSD_NR_lgetfh: /* lgetfh(2) */
	532	ret = do_freebsd_lgetfh(arg1, arg2);
	533	break;
	534
	535	case TARGET_FREEBSD_NR_fhopen: /* fhopen(2) */
	536	ret = do_freebsd_fhopen(arg1, arg2);
	537	break;
	538
	539	case TARGET_FREEBSD_NR_freebsd11_fhstat: /* fhstat(2) */
	540	ret = do_freebsd11_fhstat(arg1, arg2);
	541	break;
	542
	543	case TARGET_FREEBSD_NR_fhstat: /* fhstat(2) */
	544	ret = do_freebsd_fhstat(arg1, arg2);
	545	break;
	546
	547	case TARGET_FREEBSD_NR_freebsd11_fhstatfs: /* fhstatfs(2) */
	548	ret = do_freebsd11_fhstatfs(arg1, arg2);
	549	break;
	550
	551	case TARGET_FREEBSD_NR_fhstatfs: /* fhstatfs(2) */
	552	ret = do_freebsd_fhstatfs(arg1, arg2);
	553	break;
	554
d7e9a545 WL	555	case TARGET_FREEBSD_NR_freebsd11_statfs: /* statfs(2) */
	556	ret = do_freebsd11_statfs(arg1, arg2);
	557	break;
	558
	559	case TARGET_FREEBSD_NR_statfs: /* statfs(2) */
	560	ret = do_freebsd_statfs(arg1, arg2);
	561	break;
	562
	563	case TARGET_FREEBSD_NR_freebsd11_fstatfs: /* fstatfs(2) */
	564	ret = do_freebsd11_fstatfs(arg1, arg2);
	565	break;
	566
	567	case TARGET_FREEBSD_NR_fstatfs: /* fstatfs(2) */
	568	ret = do_freebsd_fstatfs(arg1, arg2);
	569	break;
	570
	571	case TARGET_FREEBSD_NR_freebsd11_getfsstat: /* getfsstat(2) */
	572	ret = do_freebsd11_getfsstat(arg1, arg2, arg3);
	573	break;
	574
	575	case TARGET_FREEBSD_NR_getfsstat: /* getfsstat(2) */
	576	ret = do_freebsd_getfsstat(arg1, arg2, arg3);
	577	break;
	578
fb96f5df SS	579	/*
	580	* sys{ctl, arch, call}
	581	*/
7adda6de KE	582	case TARGET_FREEBSD_NR___sysctl: /* sysctl(3) */
	583	ret = do_freebsd_sysctl(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6);
	584	break;
	585
6da777e2 KE	586	case TARGET_FREEBSD_NR___sysctlbyname: /* sysctlbyname(2) */
	587	ret = do_freebsd_sysctlbyname(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6);
	588	break;
	589
fb96f5df SS	590	case TARGET_FREEBSD_NR_sysarch: /* sysarch(2) */
	591	ret = do_freebsd_sysarch(cpu_env, arg1, arg2);
	592	break;
	593
db697887 WL	594	default:
	595	qemu_log_mask(LOG_UNIMP, "Unsupported syscall: %d\n", num);
	596	ret = -TARGET_ENOSYS;
	597	break;
	598	}
	599
	600	return ret;
	601	}
	602
	603	/*
	604	* do_freebsd_syscall() should always have a single exit point at the end so
	605	* that actions, such as logging of syscall results, can be performed. This
	606	* as a wrapper around freebsd_syscall() so that actually happens. Since
	607	* that is a singleton, modern compilers will inline it anyway...
66eed099 WL	608	*/
	609	abi_long do_freebsd_syscall(void *cpu_env, int num, abi_long arg1,
	610	abi_long arg2, abi_long arg3, abi_long arg4,
	611	abi_long arg5, abi_long arg6, abi_long arg7,
	612	abi_long arg8)
	613	{
4cf41e80	614	abi_long ret;
db697887	615
db697887 WL	616	if (do_strace) {
	617	print_freebsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
	618	}
	619
	620	ret = freebsd_syscall(cpu_env, num, arg1, arg2, arg3, arg4, arg5, arg6,
	621	arg7, arg8);
	622	if (do_strace) {
	623	print_freebsd_syscall_ret(num, ret);
	624	}
db697887 WL	625
db697887 WL	626	return ret;
66eed099 WL	627	}
	628
	629	void syscall_init(void)
	630	{
	631	}