io.c - platform/external/strace - Gitiles

 /*
  * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
  * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
  * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
  * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
  * 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. 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 AUTHOR ``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 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 "defs.h"
 #include <fcntl.h>
 #include <sys/uio.h>

 int
 sys_read(struct tcb *tcp)
 {
 	if (entering(tcp)) {
 		printfd(tcp, tcp->u_arg[0]);
 		tprints(", ");
 	} else {
 		if (syserror(tcp))
 			tprintf("%#lx", tcp->u_arg[1]);
 		else
 			printstr(tcp, tcp->u_arg[1], tcp->u_rval);
 		tprintf(", %lu", tcp->u_arg[2]);
 	}
 	return 0;
 }

 int
 sys_write(struct tcb *tcp)
 {
 	if (entering(tcp)) {
 		printfd(tcp, tcp->u_arg[0]);
 		tprints(", ");
 		printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
 		tprintf(", %lu", tcp->u_arg[2]);
 	}
 	return 0;
 }

 /*
  * data_size limits the cumulative size of printed data.
  * Example: recvmsg returing a short read.
  */
 void
 tprint_iov_upto(struct tcb *tcp, unsigned long len, unsigned long addr, int decode_iov, unsigned long data_size)
 {
 #if SUPPORTED_PERSONALITIES > 1
 	union {
 		struct { u_int32_t base; u_int32_t len; } iov32;
 		struct { u_int64_t base; u_int64_t len; } iov64;
 	} iov;
 #define sizeof_iov \
 	(current_wordsize == 4 ? sizeof(iov.iov32) : sizeof(iov.iov64))
 #define iov_iov_base \
 	(current_wordsize == 4 ? (uint64_t) iov.iov32.base : iov.iov64.base)
 #define iov_iov_len \
 	(current_wordsize == 4 ? (uint64_t) iov.iov32.len : iov.iov64.len)
 #else
 	struct iovec iov;
 #define sizeof_iov sizeof(iov)
 #define iov_iov_base iov.iov_base
 #define iov_iov_len iov.iov_len
 #endif
 	unsigned long size, cur, end, abbrev_end;
 	int failed = 0;

 	if (!len) {
 		tprints("[]");
 		return;
 	}
 	size = len * sizeof_iov;
 	end = addr + size;
 	if (!verbose(tcp) || size / sizeof_iov != len || end < addr) {
 		tprintf("%#lx", addr);
 		return;
 	}
 	if (abbrev(tcp)) {
 		abbrev_end = addr + max_strlen * sizeof_iov;
 		if (abbrev_end < addr)
 			abbrev_end = end;
 	} else {
 		abbrev_end = end;
 	}
 	tprints("[");
 	for (cur = addr; cur < end; cur += sizeof_iov) {
 		if (cur > addr)
 			tprints(", ");
 		if (cur >= abbrev_end) {
 			tprints("...");
 			break;
 		}
 		if (umoven(tcp, cur, sizeof_iov, (char *) &iov) < 0) {
 			tprints("?");
 			failed = 1;
 			break;
 		}
 		tprints("{");
 		if (decode_iov) {
 			unsigned long len = iov_iov_len;
 			if (len > data_size)
 				len = data_size;
 			data_size -= len;
 			printstr(tcp, (long) iov_iov_base, len);
 		} else
 			tprintf("%#lx", (long) iov_iov_base);
 		tprintf(", %lu}", (unsigned long)iov_iov_len);
 	}
 	tprints("]");
 	if (failed)
 		tprintf(" %#lx", addr);
 #undef sizeof_iov
 #undef iov_iov_base
 #undef iov_iov_len
 }

 void
 tprint_iov(struct tcb *tcp, unsigned long len, unsigned long addr, int decode_iov)
 {
 	tprint_iov_upto(tcp, len, addr, decode_iov, (unsigned long) -1L);
 }

 int
 sys_readv(struct tcb *tcp)
 {
 	if (entering(tcp)) {
 		printfd(tcp, tcp->u_arg[0]);
 		tprints(", ");
 	} else {
 		if (syserror(tcp)) {
 			tprintf("%#lx, %lu",
 					tcp->u_arg[1], tcp->u_arg[2]);
 			return 0;
 		}
 		tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1], 1);
 		tprintf(", %lu", tcp->u_arg[2]);
 	}
 	return 0;
 }

 int
 sys_writev(struct tcb *tcp)
 {
 	if (entering(tcp)) {
 		printfd(tcp, tcp->u_arg[0]);
 		tprints(", ");
 		tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1], 1);
 		tprintf(", %lu", tcp->u_arg[2]);
 	}
 	return 0;
 }

 /* The SH4 ABI does allow long longs in odd-numbered registers, but
    does not allow them to be split between registers and memory - and
    there are only four argument registers for normal functions.  As a
    result pread takes an extra padding argument before the offset.  This
    was changed late in the 2.4 series (around 2.4.20).  */
 #if defined(SH)
 #define PREAD_OFFSET_ARG 4
 #else
 #define PREAD_OFFSET_ARG 3
 #endif

 int
 sys_pread(struct tcb *tcp)
 {
 	if (entering(tcp)) {
 		printfd(tcp, tcp->u_arg[0]);
 		tprints(", ");
 	} else {
 		if (syserror(tcp))
 			tprintf("%#lx", tcp->u_arg[1]);
 		else
 			printstr(tcp, tcp->u_arg[1], tcp->u_rval);
 		tprintf(", %lu, ", tcp->u_arg[2]);
 		printllval(tcp, "%llu", PREAD_OFFSET_ARG);
 	}
 	return 0;
 }

 int
 sys_pwrite(struct tcb *tcp)
 {
 	if (entering(tcp)) {
 		printfd(tcp, tcp->u_arg[0]);
 		tprints(", ");
 		printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
 		tprintf(", %lu, ", tcp->u_arg[2]);
 		printllval(tcp, "%llu", PREAD_OFFSET_ARG);
 	}
 	return 0;
 }

 static void
 print_llu_from_low_high_val(struct tcb *tcp, int arg)
 {
 #if SIZEOF_LONG == SIZEOF_LONG_LONG
 # if SUPPORTED_PERSONALITIES > 1
 	if (current_wordsize == sizeof(long))
 # endif
 		tprintf("%lu", (unsigned long) tcp->u_arg[arg]);
 # if SUPPORTED_PERSONALITIES > 1
 	else
 		tprintf("%lu",
 			((unsigned long) tcp->u_arg[arg + 1] << current_wordsize * 8)
 			| (unsigned long) tcp->u_arg[arg]);
 # endif
 #elif defined(LINUX_MIPSN32)
 	tprintf("%llu", (unsigned long long) tcp->ext_arg[arg]);
 #else
 # ifdef X32
 	if (current_personality == 0)
 		tprintf("%llu", (unsigned long long) tcp->ext_arg[arg]);
 	else
 # endif
 	tprintf("%llu",
 		((unsigned long long) (unsigned long) tcp->u_arg[arg + 1] << sizeof(long) * 8)
 		| (unsigned long long) (unsigned long) tcp->u_arg[arg]);
 #endif
 }

 int
 sys_preadv(struct tcb *tcp)
 {
 	if (entering(tcp)) {
 		printfd(tcp, tcp->u_arg[0]);
 		tprints(", ");
 	} else {
 		if (syserror(tcp)) {
 			tprintf("%#lx, %lu", tcp->u_arg[1], tcp->u_arg[2]);
 			return 0;
 		}
 		tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1], 1);
 		tprintf(", %lu, ", tcp->u_arg[2]);
 		print_llu_from_low_high_val(tcp, 3);
 	}
 	return 0;
 }

 int
 sys_pwritev(struct tcb *tcp)
 {
 	if (entering(tcp)) {
 		printfd(tcp, tcp->u_arg[0]);
 		tprints(", ");
 		tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1], 1);
 		tprintf(", %lu, ", tcp->u_arg[2]);
 		print_llu_from_low_high_val(tcp, 3);
 	}
 	return 0;
 }

 static void
 print_off_t(struct tcb *tcp, long addr)
 {
 	unsigned long offset;

 	if (!addr) {
 		tprints("NULL");
 		return;
 	}

 #if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
 	if (current_wordsize == 4) {
 		uint32_t off;

 		if (umove(tcp, addr, &off) < 0)
 			tprintf("%#lx", addr);
 		else
 			tprintf("[%u]", off);
 	} else
 #endif
 	if (umove(tcp, addr, &offset) < 0)
 		tprintf("%#lx", addr);
 	else
 		tprintf("[%lu]", offset);
 }

 int
 sys_sendfile(struct tcb *tcp)
 {
 	if (entering(tcp)) {
 		printfd(tcp, tcp->u_arg[0]);
 		tprints(", ");
 		printfd(tcp, tcp->u_arg[1]);
 		tprints(", ");
 		print_off_t(tcp, tcp->u_arg[2]);
 		tprintf(", %lu", tcp->u_arg[3]);
 	}
 	return 0;
 }

 void
 print_loff_t(struct tcb *tcp, long addr)
 {
 	loff_t offset;

 	if (!addr)
 		tprints("NULL");
 	else if (umove(tcp, addr, &offset) < 0)
 		tprintf("%#lx", addr);
 	else
 		tprintf("[%llu]", (unsigned long long int) offset);
 }

 int
 sys_sendfile64(struct tcb *tcp)
 {
 	if (entering(tcp)) {
 		printfd(tcp, tcp->u_arg[0]);
 		tprints(", ");
 		printfd(tcp, tcp->u_arg[1]);
 		tprints(", ");
 		print_loff_t(tcp, tcp->u_arg[2]);
 		tprintf(", %lu", tcp->u_arg[3]);
 	}
 	return 0;
 }

 #include "xlat/splice_flags.h"

 int
 sys_tee(struct tcb *tcp)
 {
 	if (entering(tcp)) {
 		/* int fd_in */
 		printfd(tcp, tcp->u_arg[0]);
 		tprints(", ");
 		/* int fd_out */
 		printfd(tcp, tcp->u_arg[1]);
 		tprints(", ");
 		/* size_t len */
 		tprintf("%lu, ", tcp->u_arg[2]);
 		/* unsigned int flags */
 		printflags(splice_flags, tcp->u_arg[3], "SPLICE_F_???");
 	}
 	return 0;
 }

 int
 sys_splice(struct tcb *tcp)
 {
 	if (entering(tcp)) {
 		/* int fd_in */
 		printfd(tcp, tcp->u_arg[0]);
 		tprints(", ");
 		/* loff_t *off_in */
 		print_loff_t(tcp, tcp->u_arg[1]);
 		tprints(", ");
 		/* int fd_out */
 		printfd(tcp, tcp->u_arg[2]);
 		tprints(", ");
 		/* loff_t *off_out */
 		print_loff_t(tcp, tcp->u_arg[3]);
 		tprints(", ");
 		/* size_t len */
 		tprintf("%lu, ", tcp->u_arg[4]);
 		/* unsigned int flags */
 		printflags(splice_flags, tcp->u_arg[5], "SPLICE_F_???");
 	}
 	return 0;
 }

 int
 sys_vmsplice(struct tcb *tcp)
 {
 	if (entering(tcp)) {
 		/* int fd */
 		printfd(tcp, tcp->u_arg[0]);
 		tprints(", ");
 		/* const struct iovec *iov, unsigned long nr_segs */
 		tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1], 1);
 		tprintf(", %lu, ", tcp->u_arg[2]);
 		/* unsigned int flags */
 		printflags(splice_flags, tcp->u_arg[3], "SPLICE_F_???");
 	}
 	return 0;
 }

 int
 sys_ioctl(struct tcb *tcp)
 {
 	const struct_ioctlent *iop;

 	if (entering(tcp)) {
 		printfd(tcp, tcp->u_arg[0]);
 		tprints(", ");
 		if (!ioctl_decode_command_number(tcp->u_arg[1])) {
 			iop = ioctl_lookup(tcp->u_arg[1]);
 			if (iop) {
 				tprints(iop->symbol);
 				while ((iop = ioctl_next_match(iop)))
 					tprintf(" or %s", iop->symbol);
 			} else {
 				ioctl_print_code(tcp->u_arg[1]);
 			}
 		}
 		ioctl_decode(tcp, tcp->u_arg[1], tcp->u_arg[2]);
 	}
 	else {
 		int ret = ioctl_decode(tcp, tcp->u_arg[1], tcp->u_arg[2]);
 		if (!ret)
 			tprintf(", %#lx", tcp->u_arg[2]);
 		else
 			return ret - 1;
 	}
 	return 0;
 }
	/*
	* Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
	* Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
	* Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
	* Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
	* 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. 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 AUTHOR ``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 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 "defs.h"
	#include <fcntl.h>
	#include <sys/uio.h>

	int
	sys_read(struct tcb *tcp)
	{
	if (entering(tcp)) {
	printfd(tcp, tcp->u_arg[0]);
	tprints(", ");
	} else {
	if (syserror(tcp))
	tprintf("%#lx", tcp->u_arg[1]);
	else
	printstr(tcp, tcp->u_arg[1], tcp->u_rval);
	tprintf(", %lu", tcp->u_arg[2]);
	}
	return 0;
	}

	int
	sys_write(struct tcb *tcp)
	{
	if (entering(tcp)) {
	printfd(tcp, tcp->u_arg[0]);
	tprints(", ");
	printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
	tprintf(", %lu", tcp->u_arg[2]);
	}
	return 0;
	}

	/*
	* data_size limits the cumulative size of printed data.
	* Example: recvmsg returing a short read.
	*/
	void
	tprint_iov_upto(struct tcb *tcp, unsigned long len, unsigned long addr, int decode_iov, unsigned long data_size)
	{
	#if SUPPORTED_PERSONALITIES > 1
	union {
	struct { u_int32_t base; u_int32_t len; } iov32;
	struct { u_int64_t base; u_int64_t len; } iov64;
	} iov;
	#define sizeof_iov \
	(current_wordsize == 4 ? sizeof(iov.iov32) : sizeof(iov.iov64))
	#define iov_iov_base \
	(current_wordsize == 4 ? (uint64_t) iov.iov32.base : iov.iov64.base)
	#define iov_iov_len \
	(current_wordsize == 4 ? (uint64_t) iov.iov32.len : iov.iov64.len)
	#else
	struct iovec iov;
	#define sizeof_iov sizeof(iov)
	#define iov_iov_base iov.iov_base
	#define iov_iov_len iov.iov_len
	#endif
	unsigned long size, cur, end, abbrev_end;
	int failed = 0;

	if (!len) {
	tprints("[]");
	return;
	}
	size = len * sizeof_iov;
	end = addr + size;
	if (!verbose(tcp) \|\| size / sizeof_iov != len \|\| end < addr) {
	tprintf("%#lx", addr);
	return;
	}
	if (abbrev(tcp)) {
	abbrev_end = addr + max_strlen * sizeof_iov;
	if (abbrev_end < addr)
	abbrev_end = end;
	} else {
	abbrev_end = end;
	}
	tprints("[");
	for (cur = addr; cur < end; cur += sizeof_iov) {
	if (cur > addr)
	tprints(", ");
	if (cur >= abbrev_end) {
	tprints("...");
	break;
	}
	if (umoven(tcp, cur, sizeof_iov, (char *) &iov) < 0) {
	tprints("?");
	failed = 1;
	break;
	}
	tprints("{");
	if (decode_iov) {
	unsigned long len = iov_iov_len;
	if (len > data_size)
	len = data_size;
	data_size -= len;
	printstr(tcp, (long) iov_iov_base, len);
	} else
	tprintf("%#lx", (long) iov_iov_base);
	tprintf(", %lu}", (unsigned long)iov_iov_len);
	}
	tprints("]");
	if (failed)
	tprintf(" %#lx", addr);
	#undef sizeof_iov
	#undef iov_iov_base
	#undef iov_iov_len
	}

	void
	tprint_iov(struct tcb *tcp, unsigned long len, unsigned long addr, int decode_iov)
	{
	tprint_iov_upto(tcp, len, addr, decode_iov, (unsigned long) -1L);
	}

	int
	sys_readv(struct tcb *tcp)
	{
	if (entering(tcp)) {
	printfd(tcp, tcp->u_arg[0]);
	tprints(", ");
	} else {
	if (syserror(tcp)) {
	tprintf("%#lx, %lu",
	tcp->u_arg[1], tcp->u_arg[2]);
	return 0;
	}
	tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1], 1);
	tprintf(", %lu", tcp->u_arg[2]);
	}
	return 0;
	}

	int
	sys_writev(struct tcb *tcp)
	{
	if (entering(tcp)) {
	printfd(tcp, tcp->u_arg[0]);
	tprints(", ");
	tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1], 1);
	tprintf(", %lu", tcp->u_arg[2]);
	}
	return 0;
	}

	/* The SH4 ABI does allow long longs in odd-numbered registers, but
	does not allow them to be split between registers and memory - and
	there are only four argument registers for normal functions. As a
	result pread takes an extra padding argument before the offset. This
	was changed late in the 2.4 series (around 2.4.20). */
	#if defined(SH)
	#define PREAD_OFFSET_ARG 4
	#else
	#define PREAD_OFFSET_ARG 3
	#endif

	int
	sys_pread(struct tcb *tcp)
	{
	if (entering(tcp)) {
	printfd(tcp, tcp->u_arg[0]);
	tprints(", ");
	} else {
	if (syserror(tcp))
	tprintf("%#lx", tcp->u_arg[1]);
	else
	printstr(tcp, tcp->u_arg[1], tcp->u_rval);
	tprintf(", %lu, ", tcp->u_arg[2]);
	printllval(tcp, "%llu", PREAD_OFFSET_ARG);
	}
	return 0;
	}

	int
	sys_pwrite(struct tcb *tcp)
	{
	if (entering(tcp)) {
	printfd(tcp, tcp->u_arg[0]);
	tprints(", ");
	printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
	tprintf(", %lu, ", tcp->u_arg[2]);
	printllval(tcp, "%llu", PREAD_OFFSET_ARG);
	}
	return 0;
	}

	static void
	print_llu_from_low_high_val(struct tcb *tcp, int arg)
	{
	#if SIZEOF_LONG == SIZEOF_LONG_LONG
	# if SUPPORTED_PERSONALITIES > 1
	if (current_wordsize == sizeof(long))
	# endif
	tprintf("%lu", (unsigned long) tcp->u_arg[arg]);
	# if SUPPORTED_PERSONALITIES > 1
	else
	tprintf("%lu",
	((unsigned long) tcp->u_arg[arg + 1] << current_wordsize * 8)
	\| (unsigned long) tcp->u_arg[arg]);
	# endif
	#elif defined(LINUX_MIPSN32)
	tprintf("%llu", (unsigned long long) tcp->ext_arg[arg]);
	#else
	# ifdef X32
	if (current_personality == 0)
	tprintf("%llu", (unsigned long long) tcp->ext_arg[arg]);
	else
	# endif
	tprintf("%llu",
	((unsigned long long) (unsigned long) tcp->u_arg[arg + 1] << sizeof(long) * 8)
	\| (unsigned long long) (unsigned long) tcp->u_arg[arg]);
	#endif
	}

	int
	sys_preadv(struct tcb *tcp)
	{
	if (entering(tcp)) {
	printfd(tcp, tcp->u_arg[0]);
	tprints(", ");
	} else {
	if (syserror(tcp)) {
	tprintf("%#lx, %lu", tcp->u_arg[1], tcp->u_arg[2]);
	return 0;
	}
	tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1], 1);
	tprintf(", %lu, ", tcp->u_arg[2]);
	print_llu_from_low_high_val(tcp, 3);
	}
	return 0;
	}

	int
	sys_pwritev(struct tcb *tcp)
	{
	if (entering(tcp)) {
	printfd(tcp, tcp->u_arg[0]);
	tprints(", ");
	tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1], 1);
	tprintf(", %lu, ", tcp->u_arg[2]);
	print_llu_from_low_high_val(tcp, 3);
	}
	return 0;
	}

	static void
	print_off_t(struct tcb *tcp, long addr)
	{
	unsigned long offset;

	if (!addr) {
	tprints("NULL");
	return;
	}

	#if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
	if (current_wordsize == 4) {
	uint32_t off;

	if (umove(tcp, addr, &off) < 0)
	tprintf("%#lx", addr);
	else
	tprintf("[%u]", off);
	} else
	#endif
	if (umove(tcp, addr, &offset) < 0)
	tprintf("%#lx", addr);
	else
	tprintf("[%lu]", offset);
	}

	int
	sys_sendfile(struct tcb *tcp)
	{
	if (entering(tcp)) {
	printfd(tcp, tcp->u_arg[0]);
	tprints(", ");
	printfd(tcp, tcp->u_arg[1]);
	tprints(", ");
	print_off_t(tcp, tcp->u_arg[2]);
	tprintf(", %lu", tcp->u_arg[3]);
	}
	return 0;
	}

	void
	print_loff_t(struct tcb *tcp, long addr)
	{
	loff_t offset;

	if (!addr)
	tprints("NULL");
	else if (umove(tcp, addr, &offset) < 0)
	tprintf("%#lx", addr);
	else
	tprintf("[%llu]", (unsigned long long int) offset);
	}

	int
	sys_sendfile64(struct tcb *tcp)
	{
	if (entering(tcp)) {
	printfd(tcp, tcp->u_arg[0]);
	tprints(", ");
	printfd(tcp, tcp->u_arg[1]);
	tprints(", ");
	print_loff_t(tcp, tcp->u_arg[2]);
	tprintf(", %lu", tcp->u_arg[3]);
	}
	return 0;
	}

	#include "xlat/splice_flags.h"

	int
	sys_tee(struct tcb *tcp)
	{
	if (entering(tcp)) {
	/* int fd_in */
	printfd(tcp, tcp->u_arg[0]);
	tprints(", ");
	/* int fd_out */
	printfd(tcp, tcp->u_arg[1]);
	tprints(", ");
	/* size_t len */
	tprintf("%lu, ", tcp->u_arg[2]);
	/* unsigned int flags */
	printflags(splice_flags, tcp->u_arg[3], "SPLICE_F_???");
	}
	return 0;
	}

	int
	sys_splice(struct tcb *tcp)
	{
	if (entering(tcp)) {
	/* int fd_in */
	printfd(tcp, tcp->u_arg[0]);
	tprints(", ");
	/* loff_t off_in /
	print_loff_t(tcp, tcp->u_arg[1]);
	tprints(", ");
	/* int fd_out */
	printfd(tcp, tcp->u_arg[2]);
	tprints(", ");
	/* loff_t off_out /
	print_loff_t(tcp, tcp->u_arg[3]);
	tprints(", ");
	/* size_t len */
	tprintf("%lu, ", tcp->u_arg[4]);
	/* unsigned int flags */
	printflags(splice_flags, tcp->u_arg[5], "SPLICE_F_???");
	}
	return 0;
	}

	int
	sys_vmsplice(struct tcb *tcp)
	{
	if (entering(tcp)) {
	/* int fd */
	printfd(tcp, tcp->u_arg[0]);
	tprints(", ");
	/* const struct iovec iov, unsigned long nr_segs /
	tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1], 1);
	tprintf(", %lu, ", tcp->u_arg[2]);
	/* unsigned int flags */
	printflags(splice_flags, tcp->u_arg[3], "SPLICE_F_???");
	}
	return 0;
	}

	int
	sys_ioctl(struct tcb *tcp)
	{
	const struct_ioctlent *iop;

	if (entering(tcp)) {
	printfd(tcp, tcp->u_arg[0]);
	tprints(", ");
	if (!ioctl_decode_command_number(tcp->u_arg[1])) {
	iop = ioctl_lookup(tcp->u_arg[1]);
	if (iop) {
	tprints(iop->symbol);
	while ((iop = ioctl_next_match(iop)))
	tprintf(" or %s", iop->symbol);
	} else {
	ioctl_print_code(tcp->u_arg[1]);
	}
	}
	ioctl_decode(tcp, tcp->u_arg[1], tcp->u_arg[2]);
	}
	else {
	int ret = ioctl_decode(tcp, tcp->u_arg[1], tcp->u_arg[2]);
	if (!ret)
	tprintf(", %#lx", tcp->u_arg[2]);
	else
	return ret - 1;
	}
	return 0;
	}