/* $NetBSD: linux32_unistd.c,v 1.44 2021/11/27 21:15:07 ryo Exp $ */

/* $NetBSD: linux32_unistd.c,v 1.44 2021/11/27 21:15:07 ryo Exp $ */

/*-
* Copyright (c) 2006 Emmanuel Dreyfus, all rights reserved.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Emmanuel Dreyfus
* 4. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE 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>

__KERNEL_RCSID(0, "$NetBSD: linux32_unistd.c,v 1.44 2021/11/27 21:15:07 ryo Exp $");

#include <sys/types.h>
#include <sys/param.h>
#include <sys/fstypes.h>
#include <sys/signal.h>
#include <sys/dirent.h>
#include <sys/kernel.h>
#include <sys/fcntl.h>
#include <sys/select.h>
#include <sys/proc.h>
#include <sys/ucred.h>
#include <sys/swap.h>
#include <sys/kauth.h>
#include <sys/filedesc.h>
#include <sys/vfs_syscalls.h>

#include <machine/types.h>

#include <sys/syscallargs.h>

#include <compat/netbsd32/netbsd32.h>
#include <compat/netbsd32/netbsd32_conv.h>

#include <compat/linux/common/linux_types.h>
#include <compat/linux/common/linux_signal.h>
#include <compat/linux/common/linux_machdep.h>
#include <compat/linux/common/linux_misc.h>
#include <compat/linux/common/linux_oldolduname.h>
#include <compat/linux/common/linux_ipc.h>
#include <compat/linux/common/linux_sem.h>
#include <compat/linux/common/linux_fcntl.h>
#include <compat/linux/linux_syscallargs.h>

#include <compat/linux32/common/linux32_types.h>
#include <compat/linux32/common/linux32_signal.h>
#include <compat/linux32/common/linux32_machdep.h>
#include <compat/linux32/common/linux32_sched.h>
#include <compat/linux32/common/linux32_sysctl.h>
#include <compat/linux32/common/linux32_socketcall.h>
#include <compat/linux32/linux32_syscall.h>
#include <compat/linux32/linux32_syscallargs.h>

static int linux32_select1(struct lwp *, register_t *,
int, fd_set *, fd_set *, fd_set *, struct timeval *);

int
linux32_sys_brk(struct lwp *l, const struct linux32_sys_brk_args *uap, register_t *retval)
{
/* {
syscallarg(netbsd32_charp) nsize;
} */
struct linux_sys_brk_args ua;

NETBSD32TOP_UAP(nsize, char);
return linux_sys_brk(l, &ua, retval);
}

int
linux32_sys_llseek(struct lwp *l, const struct linux32_sys_llseek_args *uap, register_t *retval)
{
/* {
syscallarg(int) fd;
syscallarg(u_int32_t) ohigh;
syscallarg(u_int32_t) olow;
syscallarg(netbsd32_voidp) res;
syscallarg(int) whence;
} */
struct linux_sys_llseek_args ua;

NETBSD32TO64_UAP(fd);
NETBSD32TO64_UAP(ohigh);
NETBSD32TO64_UAP(olow);
NETBSD32TOP_UAP(res, void);
NETBSD32TO64_UAP(whence);

return linux_sys_llseek(l, &ua, retval);
}

int
linux32_sys_select(struct lwp *l, const struct linux32_sys_select_args *uap, register_t *retval)
{
/* {
syscallarg(int) nfds;
syscallarg(netbsd32_fd_setp_t) readfds;
syscallarg(netbsd32_fd_setp_t) writefds;
syscallarg(netbsd32_fd_setp_t) exceptfds;
syscallarg(netbsd32_timeval50p_t) timeout;
} */

return linux32_select1(l, retval, SCARG(uap, nfds),
SCARG_P32(uap, readfds),
SCARG_P32(uap, writefds),
SCARG_P32(uap, exceptfds),
SCARG_P32(uap, timeout));
}

int
linux32_sys_oldselect(struct lwp *l, const struct linux32_sys_oldselect_args *uap, register_t *retval)
{
/* {
syscallarg(linux32_oldselectp_t) lsp;
} */
struct linux32_oldselect lsp32;
int error;

if ((error = copyin(SCARG_P32(uap, lsp), &lsp32, sizeof(lsp32))) != 0)
return error;

return linux32_select1(l, retval, lsp32.nfds,
NETBSD32PTR64(lsp32.readfds), NETBSD32PTR64(lsp32.writefds),
NETBSD32PTR64(lsp32.exceptfds), NETBSD32PTR64(lsp32.timeout));
}

static int
linux32_select1(struct lwp *l, register_t *retval, int nfds,
fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
struct timeval *timeout)
{
struct timespec ts0, ts1, uts, *ts = NULL;
struct netbsd32_timeval50 utv32;
int error;

/*
* Store current time for computation of the amount of
* time left.
*/
if (timeout) {
if ((error = copyin(timeout, &utv32, sizeof(utv32))))
return error;

uts.tv_sec = utv32.tv_sec;
uts.tv_nsec = (long)((unsigned long)utv32.tv_usec * 1000);

if (itimespecfix(&uts)) {
/*
* The timeval was invalid. Convert it to something
* valid that will act as it does under Linux.
*/
uts.tv_sec += uts.tv_nsec / 1000000000;
uts.tv_nsec %= 1000000000;
if (uts.tv_nsec < 0) {
uts.tv_sec -= 1;
uts.tv_nsec += 1000000000;
}
if (uts.tv_sec < 0)
timespecclear(&uts);
}
nanotime(&ts0);
ts = &uts;
} else
timespecclear(&uts); /* XXX GCC4 */

error = selcommon(retval, nfds, readfds, writefds, exceptfds, ts, NULL);

if (error) {
/*
* See fs/select.c in the Linux kernel. Without this,
* Maelstrom doesn't work.
*/
if (error == ERESTART)
error = EINTR;
return error;
}

if (timeout) {
if (*retval) {
/*
* Compute how much time was left of the timeout,
* by subtracting the current time and the time
* before we started the call, and subtracting
* that result from the user-supplied value.
*/
nanotime(&ts1);
timespecsub(&ts1, &ts0, &ts1);
timespecsub(&uts, &ts1, &uts);
if (uts.tv_sec < 0)
timespecclear(&uts);
} else {
timespecclear(&uts);
}

utv32.tv_sec = uts.tv_sec;
utv32.tv_usec = uts.tv_nsec / 1000;

if ((error = copyout(&utv32, timeout, sizeof(utv32))))
return error;
}

return 0;
}

int
linux32_sys_pselect6(struct lwp *l, const struct linux32_sys_pselect6_args *uap,
register_t *retval)
{
/* {
syscallarg(int) nfds;
syscallarg(netbsd32_fd_setp_t) readfds;
syscallarg(netbsd32_fd_setp_t) writefds;
syscallarg(netbsd32_fd_setp_t) exceptfds;
syscallarg(linux32_timespecp_t) timeout;
syscallarg(linux32_sized_sigsetp_t) ss;
} */
struct timespec uts, ts0, ts1, *tsp;
linux32_sized_sigset_t lsss;
struct linux32_timespec lts;
linux32_sigset_t lss;
sigset_t *ssp;
sigset_t ss;
int error;
void *p;

ssp = NULL;
if ((p = SCARG_P32(uap, ss)) != NULL) {
if ((error = copyin(p, &lsss, sizeof(lsss))) != 0)
return (error);
if (lsss.ss_len != sizeof(lss))
return (EINVAL);
if ((p = NETBSD32PTR64(lsss.ss)) != NULL) {
if ((error = copyin(p, &lss, sizeof(lss))) != 0)
return (error);
linux32_to_native_sigset(&ss, &lss);
ssp = &ss;
}
}

if ((p = SCARG_P32(uap, timeout)) != NULL) {
error = copyin(p, &lts, sizeof(lts));
if (error != 0)
return (error);
linux32_to_native_timespec(&uts, &lts);

if (itimespecfix(&uts))
return (EINVAL);

nanotime(&ts0);
tsp = &uts;
} else {
tsp = NULL;
}

error = selcommon(retval, SCARG(uap, nfds), SCARG_P32(uap, readfds),
SCARG_P32(uap, writefds), SCARG_P32(uap, exceptfds), tsp, ssp);

if (error == 0 && tsp != NULL) {
if (retval != 0) {
/*
* Compute how much time was left of the timeout,
* by subtracting the current time and the time
* before we started the call, and subtracting
* that result from the user-supplied value.
*/
nanotime(&ts1);
timespecsub(&ts1, &ts0, &ts1);
timespecsub(&uts, &ts1, &uts);
if (uts.tv_sec < 0)
timespecclear(&uts);
} else {
timespecclear(&uts);
}

native_to_linux32_timespec(&lts, &uts);
error = copyout(&lts, SCARG_P32(uap, timeout), sizeof(lts));
}

return (error);
}

int
linux32_sys_pipe(struct lwp *l, const struct linux32_sys_pipe_args *uap,
register_t *retval)
{
/* {
syscallarg(netbsd32_intp) fd;
} */
int f[2], error;

if ((error = pipe1(l, f, 0)))
return error;

if ((error = copyout(f, SCARG_P32(uap, fd), sizeof(f))) != 0)
return error;
retval[0] = 0;
return 0;
}

int
linux32_sys_pipe2(struct lwp *l, const struct linux32_sys_pipe2_args *uap,
register_t *retval)
{
/* {
syscallarg(netbsd32_intp) fd;
} */
int f[2], flags, error;

flags = linux_to_bsd_ioflags(SCARG(uap, flags));
if ((flags & ~(O_CLOEXEC|O_NONBLOCK)) != 0)
return EINVAL;

if ((error = pipe1(l, f, flags)))
return error;

if ((error = copyout(f, SCARG_P32(uap, fd), sizeof(f))) != 0)
return error;
retval[0] = 0;
return 0;
}

int
linux32_sys_dup3(struct lwp *l, const struct linux32_sys_dup3_args *uap,
register_t *retval)
{
/* {
syscallarg(int) from;
syscallarg(int) to;
syscallarg(int) flags;
} */
struct linux_sys_dup3_args ua;

NETBSD32TO64_UAP(from);
NETBSD32TO64_UAP(to);
NETBSD32TO64_UAP(flags);

return linux_sys_dup3(l, &ua, retval);
}

int
linux32_sys_openat(struct lwp *l, const struct linux32_sys_openat_args *uap, register_t *retval)
{
/* {
syscallarg(int) fd;
syscallarg(const netbsd32_charp) path;
syscallarg(int) flags;
syscallarg(int) mode;
} */
struct linux_sys_openat_args ua;

NETBSD32TO64_UAP(fd);
NETBSD32TOP_UAP(path, const char);
NETBSD32TO64_UAP(flags);
NETBSD32TO64_UAP(mode);

return linux_sys_openat(l, &ua, retval);
}

int
linux32_sys_mknodat(struct lwp *l, const struct linux32_sys_mknodat_args *uap, register_t *retval)
{
/* {
syscallarg(int) fd;
syscallarg(const netbsd32_charp) path;
syscallarg(linux_umode_t) mode;
syscallarg(unsigned) dev;
} */
struct linux_sys_mknodat_args ua;

NETBSD32TO64_UAP(fd);
NETBSD32TOP_UAP(path, const char);
NETBSD32TO64_UAP(mode);
NETBSD32TO64_UAP(dev);

return linux_sys_mknodat(l, &ua, retval);
}

int
linux32_sys_linkat(struct lwp *l, const struct linux32_sys_linkat_args *uap, register_t *retval)
{
/* {
syscallarg(int) fd1;
syscallarg(netbsd32_charp) name1;
syscallarg(int) fd2;
syscallarg(netbsd32_charp) name2;
syscallarg(int) flags;
} */
int fd1 = SCARG(uap, fd1);
const char *name1 = SCARG_P32(uap, name1);
int fd2 = SCARG(uap, fd2);
const char *name2 = SCARG_P32(uap, name2);
int follow;

follow = SCARG(uap, flags) & LINUX_AT_SYMLINK_FOLLOW;

return do_sys_linkat(l, fd1, name1, fd2, name2, follow, retval);
}

int
linux32_sys_unlink(struct lwp *l, const struct linux32_sys_unlink_args *uap, register_t *retval)
{
/* {
syscallarg(const netbsd32_charp) path;
} */
struct linux_sys_unlink_args ua;

NETBSD32TOP_UAP(path, const char);

return linux_sys_unlink(l, &ua, retval);
}

int
linux32_sys_unlinkat(struct lwp *l, const struct linux32_sys_unlinkat_args *uap, register_t *retval)
{
/* {
syscallarg(int) fd;
syscallarg(const netbsd32_charp) path;
syscallarg(int) flag;
} */
struct linux_sys_unlinkat_args ua;

NETBSD32TO64_UAP(fd);
NETBSD32TOP_UAP(path, const char);
NETBSD32TO64_UAP(flag);

return linux_sys_unlinkat(l, &ua, retval);
}

int
linux32_sys_fchmodat(struct lwp *l, const struct linux32_sys_fchmodat_args *uap, register_t *retval)
{
/* {
syscallarg(int) fd;
syscallarg(netbsd_charp) path;
syscallarg(linux_umode_t) mode;
} */

return do_sys_chmodat(l, SCARG(uap, fd), SCARG_P32(uap, path),
SCARG(uap, mode), AT_SYMLINK_FOLLOW);
}

int
linux32_sys_fchownat(struct lwp *l, const struct linux32_sys_fchownat_args *uap, register_t *retval)
{
/* {
syscallarg(int) fd;
syscallarg(netbsd_charp) path;
syscallarg(uid_t) owner;
syscallarg(gid_t) group;
syscallarg(int) flag;
} */
int flag;

flag = linux_to_bsd_atflags(SCARG(uap, flag));
return do_sys_chownat(l, SCARG(uap, fd), SCARG_P32(uap, path),
SCARG(uap, owner), SCARG(uap, group), flag);
}

int
linux32_sys_faccessat(struct lwp *l, const struct linux32_sys_faccessat_args *uap, register_t *retval)
{
/* {
syscallarg(int) fd;
syscallarg(netbsd_charp) path;
syscallarg(int) amode;
} */

return do_sys_accessat(l, SCARG(uap, fd), SCARG_P32(uap, path),
SCARG(uap, amode), AT_SYMLINK_FOLLOW);
}

int
linux32_sys_utimensat(struct lwp *l, const struct linux32_sys_utimensat_args *uap, register_t *retval)
{
/* {
syscallarg(int) fd;
syscallarg(const netbsd32_charp) path;
syscallarg(const linux32_timespecp_t) times;
syscallarg(int) flags;
} */
int error;
struct linux32_timespec lts[2];
struct timespec *tsp = NULL, ts[2];

if (SCARG_P32(uap, times)) {
error = copyin(SCARG_P32(uap, times), &lts, sizeof(lts));
if (error != 0)
return error;
linux32_to_native_timespec(&ts[0], &lts[0]);
linux32_to_native_timespec(&ts[1], &lts[1]);
tsp = ts;
}

return linux_do_sys_utimensat(l, SCARG(uap, fd), SCARG_P32(uap, path),
tsp, SCARG(uap, flag), retval);
}

int
linux32_sys_creat(struct lwp *l, const struct linux32_sys_creat_args *uap, register_t *retval)
{
/* {
syscallarg(const netbsd32_charp) path;
syscallarg(int) mode;
} */
struct sys_open_args ua;

NETBSD32TOP_UAP(path, const char);
SCARG(&ua, flags) = O_CREAT | O_TRUNC | O_WRONLY;
NETBSD32TO64_UAP(mode);

return sys_open(l, &ua, retval);
}

int
linux32_sys_mknod(struct lwp *l, const struct linux32_sys_mknod_args *uap, register_t *retval)
{
/* {
syscallarg(const netbsd32_charp) path;
syscallarg(int) mode;
syscallarg(int) dev;
} */
struct linux_sys_mknod_args ua;

NETBSD32TOP_UAP(path, const char);
NETBSD32TO64_UAP(mode);
NETBSD32TO64_UAP(dev);

return linux_sys_mknod(l, &ua, retval);
}

#ifdef LINUX32_SYS_break
int
linux32_sys_break(struct lwp *l, const struct linux32_sys_break_args *uap, register_t *retval)
{
#if 0
/* {
syscallarg(const netbsd32_charp) nsize;
} */
#endif

return ENOSYS;
}
#endif

int
linux32_sys_swapon(struct lwp *l, const struct linux32_sys_swapon_args *uap, register_t *retval)
{
/* {
syscallarg(const netbsd32_charp) name;
} */
struct sys_swapctl_args ua;

SCARG(&ua, cmd) = SWAP_ON;
SCARG(&ua, arg) = SCARG_P32(uap, name);
SCARG(&ua, misc) = 0; /* priority */
return (sys_swapctl(l, &ua, retval));
}

int
linux32_sys_swapoff(struct lwp *l, const struct linux32_sys_swapoff_args *uap, register_t *retval)
{
/* {
syscallarg(const netbsd32_charp) path;
} */
struct sys_swapctl_args ua;

SCARG(&ua, cmd) = SWAP_OFF;
SCARG(&ua, arg) = SCARG_P32(uap, path);
SCARG(&ua, misc) = 0; /* priority */
return (sys_swapctl(l, &ua, retval));
}

int
linux32_sys_reboot(struct lwp *l, const struct linux32_sys_reboot_args *uap, register_t *retval)
{
/* {
syscallarg(int) magic1;
syscallarg(int) magic2;
syscallarg(int) cmd;
syscallarg(netbsd32_voidp) arg;
} */
struct linux_sys_reboot_args ua;

NETBSD32TO64_UAP(magic1);
NETBSD32TO64_UAP(magic2);
NETBSD32TO64_UAP(cmd);
NETBSD32TOP_UAP(arg, void);

return linux_sys_reboot(l, &ua, retval);
}

int
linux32_sys_setresuid(struct lwp *l, const struct linux32_sys_setresuid_args *uap, register_t *retval)
{
/* {
syscallarg(uid_t) ruid;
syscallarg(uid_t) euid;
syscallarg(uid_t) suid;
} */
struct linux_sys_setresuid_args ua;

NETBSD32TO64_UAP(ruid);
NETBSD32TO64_UAP(euid);
NETBSD32TO64_UAP(suid);

return linux_sys_setresuid(l, &ua, retval);
}

int
linux32_sys_getresuid(struct lwp *l, const struct linux32_sys_getresuid_args *uap, register_t *retval)
{
/* {
syscallarg(linux32_uidp_t) ruid;
syscallarg(linux32_uidp_t) euid;
syscallarg(linux32_uidp_t) suid;
} */
kauth_cred_t pc = l->l_cred;
int error;
uid_t uid;

uid = kauth_cred_getuid(pc);
if ((error = copyout(&uid, SCARG_P32(uap, ruid), sizeof(uid_t))) != 0)
return error;

uid = kauth_cred_geteuid(pc);
if ((error = copyout(&uid, SCARG_P32(uap, euid), sizeof(uid_t))) != 0)
return error;

uid = kauth_cred_getsvuid(pc);
return copyout(&uid, SCARG_P32(uap, suid), sizeof(uid_t));
}

int
linux32_sys_setresgid(struct lwp *l, const struct linux32_sys_setresgid_args *uap, register_t *retval)
{
/* {
syscallarg(gid_t) rgid;
syscallarg(gid_t) egid;
syscallarg(gid_t) sgid;
} */
struct linux_sys_setresgid_args ua;

NETBSD32TO64_UAP(rgid);
NETBSD32TO64_UAP(egid);
NETBSD32TO64_UAP(sgid);

return linux_sys_setresgid(l, &ua, retval);
}

int
linux32_sys_getresgid(struct lwp *l, const struct linux32_sys_getresgid_args *uap, register_t *retval)
{
/* {
syscallarg(linux32_gidp_t) rgid;
syscallarg(linux32_gidp_t) egid;
syscallarg(linux32_gidp_t) sgid;
} */
kauth_cred_t pc = l->l_cred;
int error;
gid_t gid;

gid = kauth_cred_getgid(pc);
if ((error = copyout(&gid, SCARG_P32(uap, rgid), sizeof(gid_t))) != 0)
return error;

gid = kauth_cred_getegid(pc);
if ((error = copyout(&gid, SCARG_P32(uap, egid), sizeof(gid_t))) != 0)
return error;

gid = kauth_cred_getsvgid(pc);
return copyout(&gid, SCARG_P32(uap, sgid), sizeof(gid_t));
}

int
linux32_sys_nice(struct lwp *l, const struct linux32_sys_nice_args *uap, register_t *retval)
{
/* {
syscallarg(int) incr;
} */
struct proc *p = l->l_proc;
struct sys_setpriority_args bsa;
int error;

SCARG(&bsa, which) = PRIO_PROCESS;
SCARG(&bsa, who) = 0;
SCARG(&bsa, prio) = p->p_nice - NZERO + SCARG(uap, incr);

error = sys_setpriority(l, &bsa, retval);
return (error) ? EPERM : 0;
}

int
linux32_sys_alarm(struct lwp *l, const struct linux32_sys_alarm_args *uap, register_t *retval)
{
/* {
syscallarg(unsigned int) secs;
} */
struct linux_sys_alarm_args ua;

NETBSD32TO64_UAP(secs);

return linux_sys_alarm(l, &ua, retval);
}

int
linux32_sys_fdatasync(struct lwp *l, const struct linux32_sys_fdatasync_args *uap, register_t *retval)
{
/* {
syscallarg(int) fd;
} */
struct linux_sys_fdatasync_args ua;

NETBSD32TO64_UAP(fd);

return linux_sys_fdatasync(l, &ua, retval);
}

int
linux32_sys_setfsuid(struct lwp *l, const struct linux32_sys_setfsuid_args *uap, register_t *retval)
{
/* {
syscallarg(uid_t) uid;
} */
struct linux_sys_setfsuid_args ua;

NETBSD32TO64_UAP(uid);

return linux_sys_setfsuid(l, &ua, retval);
}

int
linux32_sys_setfsgid(struct lwp *l, const struct linux32_sys_setfsgid_args *uap, register_t *retval)
{
/* {
syscallarg(gid_t) gid;
} */
struct linux_sys_setfsgid_args ua;

NETBSD32TO64_UAP(gid);

return linux_sys_setfsgid(l, &ua, retval);
}

/*
* pread(2).
*/
int
linux32_sys_pread(struct lwp *l,
const struct linux32_sys_pread_args *uap, register_t *retval)
{
/* {
syscallarg(int) fd;
syscallarg(netbsd32_voidp) buf;
syscallarg(netbsd32_size_t) nbyte;
syscallarg(netbsd32_off_t) offset;
} */
struct sys_pread_args pra;

SCARG(&pra, fd) = SCARG(uap, fd);
SCARG(&pra, buf) = SCARG_P32(uap, buf);
SCARG(&pra, nbyte) = SCARG(uap, nbyte);
SCARG(&pra, PAD) = 0;
SCARG(&pra, offset) = SCARG(uap, offset);

return sys_pread(l, &pra, retval);
}

/*
* pwrite(2).
*/
int
linux32_sys_pwrite(struct lwp *l,
const struct linux32_sys_pwrite_args *uap, register_t *retval)
{
/* {
syscallarg(int) fd;
syscallarg(const netbsd32_voidp) buf;
syscallarg(netbsd32_size_t) nbyte;
syscallarg(netbsd32_off_t) offset;
} */
struct sys_pwrite_args pra;

SCARG(&pra, fd) = SCARG(uap, fd);
SCARG(&pra, buf) = SCARG_P32(uap, buf);
SCARG(&pra, nbyte) = SCARG(uap, nbyte);
SCARG(&pra, PAD) = 0;
SCARG(&pra, offset) = SCARG(uap, offset);

return sys_pwrite(l, &pra, retval);
}

/*
* fallocate(2)
*/
int
linux32_sys_fallocate(struct lwp *l,
const struct linux32_sys_fallocate_args *uap, register_t *retval)
{
/*
* For now just return EOPNOTSUPP, this makes glibc posix_fallocate()
* to fallback to emulation.
* XXX Right now no filesystem actually implements fallocate support,
* so no need for mapping.
*/
return EOPNOTSUPP;
}