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/* $NetBSD: linux32_misc.c,v 1.34 2021/11/25 03:08:04 ryo Exp $ */
/*-
* Copyright (c) 1995, 1998, 1999 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Frank van der Linden and Eric Haszlakiewicz; by Jason R. Thorpe
* of the Numerical Aerospace Simulation Facility, NASA Ames Research Center;
* by Edgar Fu\ss, Mathematisches Institut der Uni Bonn.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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_misc.c,v 1.34 2021/11/25 03:08:04 ryo Exp $");
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/fstypes.h>
#include <sys/vfs_syscalls.h>
#include <sys/ptrace.h>
#include <sys/syscall.h>
#include <sys/poll.h>
#include <sys/futex.h>
#include <compat/netbsd32/netbsd32.h>
#include <compat/netbsd32/netbsd32_syscallargs.h>
#include <compat/linux/common/linux_types.h>
#include <compat/linux32/common/linux32_types.h>
#include <compat/linux32/common/linux32_machdep.h>
#include <compat/linux32/common/linux32_signal.h>
#include <compat/linux32/common/linux32_sched.h>
#include <compat/linux32/linux32_syscallargs.h>
#include <compat/linux/common/linux_ptrace.h>
#include <compat/linux/common/linux_emuldata.h>
#include <compat/linux/common/linux_signal.h>
#include <compat/linux/common/linux_misc.h>
#include <compat/linux/common/linux_statfs.h>
#include <compat/linux/common/linux_ipc.h>
#include <compat/linux/common/linux_sem.h>
#include <compat/linux/linux_syscallargs.h>
extern const struct linux_mnttypes linux_fstypes[];
extern const int linux_fstypes_cnt;
/*
* Implement the fs stat functions. Straightforward.
*/
int
linux32_sys_statfs(struct lwp *l, const struct linux32_sys_statfs_args *uap, register_t *retval)
{
/* {
syscallarg(const netbsd32_charp char) path;
syscallarg(linux32_statfsp) sp;
} */
struct statvfs *sb;
struct linux_statfs ltmp;
int error;
sb = STATVFSBUF_GET();
error = do_sys_pstatvfs(l, SCARG_P32(uap, path), ST_WAIT, sb);
if (error == 0) {
bsd_to_linux_statfs(sb, <mp);
error = copyout(<mp, SCARG_P32(uap, sp), sizeof ltmp);
}
STATVFSBUF_PUT(sb);
return error;
}
int
linux32_sys_fstatfs(struct lwp *l, const struct linux32_sys_fstatfs_args *uap, register_t *retval)
{
/* {
syscallarg(int) fd;
syscallarg(linux32_statfsp) sp;
} */
struct statvfs *sb;
struct linux_statfs ltmp;
int error;
sb = STATVFSBUF_GET();
error = do_sys_fstatvfs(l, SCARG(uap, fd), ST_WAIT, sb);
if (error == 0) {
bsd_to_linux_statfs(sb, <mp);
error = copyout(<mp, SCARG_P32(uap, sp), sizeof ltmp);
}
STATVFSBUF_PUT(sb);
return error;
}
int
linux32_sys_statfs64(struct lwp *l, const struct linux32_sys_statfs64_args *uap, register_t *retval)
{
/* {
syscallarg(const netbsd32_charp char) path;
syscallarg(linux32_statfs64p) sp;
} */
struct statvfs *sb;
struct linux_statfs64 ltmp;
int error;
sb = STATVFSBUF_GET();
error = do_sys_pstatvfs(l, SCARG_P32(uap, path), ST_WAIT, sb);
if (error == 0) {
bsd_to_linux_statfs64(sb, <mp);
error = copyout(<mp, SCARG_P32(uap, sp), sizeof ltmp);
}
STATVFSBUF_PUT(sb);
return error;
}
int
linux32_sys_fstatfs64(struct lwp *l, const struct linux32_sys_fstatfs64_args *uap, register_t *retval)
{
/* {
syscallarg(int) fd;
syscallarg(linux32_statfs64p) sp;
} */
struct statvfs *sb;
struct linux_statfs64 ltmp;
int error;
sb = STATVFSBUF_GET();
error = do_sys_fstatvfs(l, SCARG(uap, fd), ST_WAIT, sb);
if (error == 0) {
bsd_to_linux_statfs64(sb, <mp);
error = copyout(<mp, SCARG_P32(uap, sp), sizeof ltmp);
}
STATVFSBUF_PUT(sb);
return error;
}
extern const int linux_ptrace_request_map[];
int
linux32_sys_ptrace(struct lwp *l, const struct linux32_sys_ptrace_args *uap, register_t *retval)
{
/* {
i386, m68k, powerpc: T=int
aarch64, alpha, amd64: T=long
syscallarg(T) request;
syscallarg(T) pid;
syscallarg(T) addr;
syscallarg(T) data;
} */
const int *ptr;
int request;
int error;
ptr = linux_ptrace_request_map;
request = SCARG(uap, request);
while (*ptr != -1)
if (*ptr++ == request) {
struct sys_ptrace_args pta;
SCARG(&pta, req) = *ptr;
SCARG(&pta, pid) = SCARG(uap, pid);
SCARG(&pta, addr) = NETBSD32IPTR64(SCARG(uap, addr));
SCARG(&pta, data) = SCARG(uap, data);
/*
* Linux ptrace(PTRACE_CONT, pid, 0, 0) means actually
* to continue where the process left off previously.
* The same thing is achieved by addr == (void *) 1
* on NetBSD, so rewrite 'addr' appropriately.
*/
if (request == LINUX_PTRACE_CONT && SCARG(uap, addr)==0)
SCARG(&pta, addr) = (void *) 1;
error = sysent[SYS_ptrace].sy_call(l, &pta, retval);
if (error)
return error;
switch (request) {
case LINUX_PTRACE_PEEKTEXT:
case LINUX_PTRACE_PEEKDATA:
error = copyout (retval,
NETBSD32IPTR64(SCARG(uap, data)),
sizeof *retval);
*retval = SCARG(uap, data);
break;
default:
break;
}
return error;
}
else
ptr++;
return EIO;
}
int
linux32_sys_personality(struct lwp *l, const struct linux32_sys_personality_args *uap, register_t *retval)
{
/* {
syscallarg(netbsd32_u_long) per;
} */
struct linux_sys_personality_args ua;
NETBSD32TOX_UAP(per, long);
return linux_sys_personality(l, &ua, retval);
}
int
linux32_sys_futex(struct lwp *l,
const struct linux32_sys_futex_args *uap, register_t *retval)
{
/* {
syscallarg(linux32_intp_t) uaddr;
syscallarg(int) op;
syscallarg(int) val;
syscallarg(linux32_timespecp_t) timeout;
syscallarg(linux32_intp_t) uaddr2;
syscallarg(int) val3;
} */
struct linux32_timespec lts;
struct timespec ts, *tsp = NULL;
int val2 = 0;
int error;
/*
* Linux overlays the "timeout" field and the "val2" field.
* "timeout" is only valid for FUTEX_WAIT and FUTEX_WAIT_BITSET
* on Linux.
*/
const int op = (SCARG(uap, op) & FUTEX_CMD_MASK);
if ((op == FUTEX_WAIT || op == FUTEX_WAIT_BITSET) &&
SCARG_P32(uap, timeout) != NULL) {
if ((error = copyin(SCARG_P32(uap, timeout),
<s, sizeof(lts))) != 0) {
return error;
}
linux32_to_native_timespec(&ts, <s);
tsp = &ts;
} else {
val2 = (int)(uintptr_t)SCARG_P32(uap, timeout);
}
return linux_do_futex(SCARG_P32(uap, uaddr), SCARG(uap, op),
SCARG(uap, val), tsp, SCARG_P32(uap, uaddr2), val2,
SCARG(uap, val3), retval);
}
int
linux32_sys_truncate64(struct lwp *l, const struct linux32_sys_truncate64_args *uap, register_t *retval)
{
/* {
syscallarg(netbsd32_charp) path;
syscallarg(off_t) length;
} */
struct sys_truncate_args ua;
/* Linux doesn't have the 'pad' pseudo-parameter */
NETBSD32TOP_UAP(path, const char *);
SCARG(&ua, PAD) = 0;
SCARG(&ua, length) = ((off_t)SCARG(uap, lenhi) << 32) + SCARG(uap, lenlo);
return sys_truncate(l, &ua, retval);
}
int
linux32_sys_ftruncate64(struct lwp *l, const struct linux32_sys_ftruncate64_args *uap, register_t *retval)
{
/* {
syscallarg(unsigned int) fd;
syscallarg(off_t) length;
} */
struct sys_ftruncate_args ua;
/* Linux doesn't have the 'pad' pseudo-parameter */
NETBSD32TO64_UAP(fd);
SCARG(&ua, PAD) = 0;
SCARG(&ua, length) = ((off_t)SCARG(uap, lenhi) << 32) + SCARG(uap, lenlo);
return sys_ftruncate(l, &ua, retval);
}
int
linux32_sys_setdomainname(struct lwp *l, const struct linux32_sys_setdomainname_args *uap, register_t *retval)
{
/* {
syscallarg(netbsd32_charp) domainname;
syscallarg(int) len;
} */
struct linux_sys_setdomainname_args ua;
NETBSD32TOP_UAP(domainname, char);
NETBSD32TO64_UAP(len);
return linux_sys_setdomainname(l, &ua, retval);
}
int
linux32_sys_ppoll(struct lwp *l, const struct linux32_sys_ppoll_args *uap,
register_t *retval)
{
/* {
syscallarg(netbsd32_pollfdp_t) fds;
syscallarg(u_int) nfds;
syscallarg(linux32_timespecp_t) timeout;
syscallarg(linux32_sigsetp_t) sigset;
} */
struct linux32_timespec lts0, *lts;
struct timespec ts0, *ts = NULL;
linux32_sigset_t lsigmask0, *lsigmask;
sigset_t sigmask0, *sigmask = NULL;
int error;
lts = SCARG_P32(uap, timeout);
if (lts) {
if ((error = copyin(lts, <s0, sizeof(lts0))) != 0)
return error;
linux32_to_native_timespec(&ts0, <s0);
ts = &ts0;
}
lsigmask = SCARG_P32(uap, sigset);
if (lsigmask) {
if ((error = copyin(lsigmask, &lsigmask0, sizeof(lsigmask0))))
return error;
linux32_to_native_sigset(&sigmask0, &lsigmask0);
sigmask = &sigmask0;
}
return pollcommon(retval, SCARG_P32(uap, fds), SCARG(uap, nfds),
ts, sigmask);
}
int
linux32_sys_eventfd(struct lwp *l, const struct linux32_sys_eventfd_args *uap,
register_t *retval)
{
/* {
syscallarg(unsigned int) initval;
} */
struct linux_sys_eventfd_args ua;
NETBSD32TO64_UAP(initval);
return linux_sys_eventfd(l, &ua, retval);
}
int
linux32_sys_eventfd2(struct lwp *l, const struct linux32_sys_eventfd2_args *uap,
register_t *retval)
{
/* {
syscallarg(unsigned int) initval;
syscallarg(int) flags;
} */
struct linux_sys_eventfd2_args ua;
NETBSD32TO64_UAP(initval);
NETBSD32TO64_UAP(flags);
return linux_sys_eventfd2(l, &ua, retval);
}
static inline off_t
linux32_hilo_to_off_t(unsigned long hi, unsigned long lo)
{
return (((off_t)hi) << 32) | lo;
}
int
linux32_sys_preadv(struct lwp *l, const struct linux32_sys_preadv_args *uap,
register_t *retval)
{
/* {
syscallarg(int) fd;
syscallarg(const netbsd32_iovecp_t) iovp;
syscallarg(int) iovcnt;
syscallarg(netbsd32_u_long) off_lo;
syscallarg(netbsd32_u_long) off_hi;
} */
struct netbsd32_preadv_args ua;
SCARG(&ua, fd) = SCARG(uap, fd);
SCARG(&ua, iovp) = SCARG(uap, iovp);
SCARG(&ua, iovcnt) = SCARG(uap, iovcnt);
SCARG(&ua, PAD) = 0;
SCARG(&ua, offset) = linux32_hilo_to_off_t(SCARG(uap, off_hi),
SCARG(uap, off_lo));
return netbsd32_preadv(l, &ua, retval);
}
int
linux32_sys_pwritev(struct lwp *l, const struct linux32_sys_pwritev_args *uap,
register_t *retval)
{
/* {
syscallarg(int) fd;
syscallarg(const netbsd32_iovecp_t) iovp;
syscallarg(int) iovcnt;
syscallarg(netbsd32_u_long) off_lo;
syscallarg(netbsd32_u_long) off_hi;
} */
struct netbsd32_pwritev_args ua;
SCARG(&ua, fd) = SCARG(uap, fd);
SCARG(&ua, iovp) = SCARG(uap, iovp);
SCARG(&ua, iovcnt) = SCARG(uap, iovcnt);
SCARG(&ua, PAD) = 0;
SCARG(&ua, offset) = linux32_hilo_to_off_t(SCARG(uap, off_hi),
SCARG(uap, off_lo));
return netbsd32_pwritev(l, &ua, retval);
}
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