tests-m32/process_vm_readv_writev.c - platform/external/strace - Git at Google

 /*
  * Check decoding of process_vm_readv/process_vm_writev syscall.
  *
  * Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
  * Copyright (c) 2016-2018 The strace developers.
  * 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 <inttypes.h>
 #include <stdio.h>
 #include <unistd.h>
 #include <sys/uio.h>

 #if OP_WR
 # define in_iovec  rmt_iovec
 # define out_iovec lcl_iovec
 # define in_iov    rmt_iov
 # define out_iov   lcl_iov
 #else
 # define in_iovec  lcl_iovec
 # define out_iovec rmt_iovec
 # define in_iov    lcl_iov
 # define out_iov   rmt_iov
 #endif

 typedef void (*iov_print_fn)(const struct iovec *, const void *, long);

 enum { MAX_SEGM_COUNT = 2, MAX_STR_LEN = 5 };

 struct print_iov_arg {
 	uint32_t count;
 	uint32_t valid    :1,
 		 string   :1,
 		 addr_term:1,
 		 check_rc :1;
 	uint32_t str_segms;
 	uint8_t  str_base[MAX_SEGM_COUNT];
 	uint8_t  str_size[MAX_SEGM_COUNT];
 };

 static void
 print_iov(const struct iovec *iov, const void *arg_ptr, long rc)
 {
 	const struct print_iov_arg *arg = arg_ptr;
 	uint32_t i;
 	uint32_t num_segm = 0;
 	uint64_t segm_offs = 0;

 	if (!arg || !arg->valid) {
 		if (iov)
 			printf("%p", iov);
 		else
 			printf("NULL");

 		return;
 	}

 	printf("[");

 	for (i = 0; i < arg->count; i++) {
 		if (i)
 			printf(", ");

 		if (i >= MAX_STR_LEN) {
 			printf("...");
 			break;
 		}

 		printf("{iov_base=");
 		if (arg->string && (!arg->check_rc || (rc != -1))) {
 			uint64_t str_left = iov[i].iov_len;
 			uint64_t pr_count = 0;

 			printf("\"");

 			while (str_left--) {
 				static const char oct_str[] = "01234567";
 				uint8_t c = arg->str_base[num_segm] + segm_offs;

 				if ((num_segm >= arg->str_segms) ||
 				    (num_segm >= MAX_SEGM_COUNT))
 					error_msg_and_fail("print_iov: segment "
 							   "count overrun");

 				if (pr_count++ < MAX_STR_LEN)
 					printf("\\%.1s%.1s%d",
 					       (c >> 6) ?
 					       oct_str + (c >> 6) : "",
 					       (c >> 3) ?
 					       oct_str + ((c >> 3) & 7) : "",
 					       c & 7);

 				segm_offs++;

 				if (segm_offs >= arg->str_size[num_segm]) {
 					num_segm++;
 					segm_offs = 0;
 				}
 			}

 			printf("\"");

 			if (pr_count > MAX_STR_LEN)
 				printf("...");
 		} else {
 			if (iov[i].iov_base)
 				printf("%p", iov[i].iov_base);
 			else
 				printf("NULL");
 		}

 		printf(", iov_len=%zu}", iov[i].iov_len);
 	}

 	if (arg->addr_term)
 		printf(", ... /* %p */", iov + arg->count);

 	printf("]");
 }

 static void
 do_call(kernel_ulong_t pid,
 	kernel_ulong_t local_iov, const char *local_arg,
 	kernel_ulong_t liovcnt,
 	kernel_ulong_t remote_iov, const char *remote_arg,
 	kernel_ulong_t riovcnt,
 	kernel_ulong_t flags, iov_print_fn pr_iov)
 {
 	long rc;
 	const char *errstr;

 	rc = syscall(OP_NR, pid, local_iov, liovcnt, remote_iov, riovcnt,
 		flags);
 	errstr = sprintrc(rc);

 	printf("%s(%d, ", OP_STR, (int) pid);

 	if (pr_iov)
 		pr_iov((const struct iovec *) (uintptr_t) local_iov, local_arg,
 			rc);
 	else
 		printf("%s", local_arg);

 	printf(", %lu, ", (unsigned long) liovcnt);

 	if (pr_iov)
 		pr_iov((const struct iovec *) (uintptr_t) remote_iov,
 		       remote_arg, rc);
 	else
 		printf("%s", remote_arg);

 	printf(", %lu, %lu) = %s\n", (unsigned long) riovcnt,
 		(unsigned long) flags, errstr);
 }

 kernel_ulong_t
 ptr_cast(void *ptr)
 {
 	return (kernel_ulong_t) (uintptr_t) ptr;
 }

 int
 main(void)
 {
 	enum {
 		SIZE_11 = 2,
 		SIZE_12 = 3,
 		SIZE_13 = 4,
 		SIZE_1 = SIZE_11 + SIZE_12 + SIZE_13,
 		SIZE_21 = 5,
 		SIZE_22 = 6,
 		SIZE_23 = 7,
 		SIZE_2 = SIZE_21 + SIZE_22 + SIZE_23,
 	};

 	enum {
 		SEGM1_BASE = 0x80,
 		SEGM2_BASE = 0xA0,
 	};

 	static const kernel_ulong_t bogus_pid =
 		(kernel_ulong_t) 0xbadfaceddeadca57ULL;
 	static const kernel_ulong_t bogus_iovcnt1 =
 		(kernel_ulong_t) 0xdec0ded1defaced2ULL;
 	static const kernel_ulong_t bogus_iovcnt2 =
 		(kernel_ulong_t) 0xdec0ded3defaced4ULL;
 	static const kernel_ulong_t bogus_flags =
 		(kernel_ulong_t) 0xdeadc0deda7adeadULL;

 	pid_t my_pid = getpid();
 	char *data1_out = tail_alloc(SIZE_1);
 	char *data2_out = tail_alloc(SIZE_2);
 	char *data1_in  = tail_alloc(SIZE_2);
 	char *data2_in  = tail_alloc(SIZE_1);

 	struct iovec bogus_iovec[] = {
 		{ data1_out + SIZE_1, (size_t) 0xdeadfaceca57beefULL },
 		{ data1_in  + SIZE_2, (size_t) 0xbadc0dedda7adeadULL },
 		{ data2_out + SIZE_2, (size_t) 0xf157facedec0ded1ULL },
 		{ data2_in  + SIZE_1, (size_t) 0xdefaced2bea7be57ULL },
 	};

 	struct iovec out_iovec[] = {
 		{ data1_out,  SIZE_11 },
 		{ data1_out + SIZE_11,  SIZE_12 },
 		{ data1_out + SIZE_11 + SIZE_12,  SIZE_13 },
 		{ data2_out,  SIZE_21 },
 		{ data2_out + SIZE_21,  SIZE_22 },
 		{ data2_out + SIZE_21 + SIZE_22,  SIZE_23 },
 	};
 	struct iovec in_iovec[] = {
 		{ data1_in,  SIZE_23 },
 		{ data1_in + SIZE_23,  SIZE_22 },
 		{ data1_in + SIZE_23 + SIZE_22,  SIZE_21 },
 		{ data2_in,  SIZE_13 },
 		{ data2_in + SIZE_13,  SIZE_12 },
 		{ data2_in + SIZE_13 + SIZE_12,  SIZE_11 },
 	};

 	struct iovec *bogus_iov = tail_memdup(bogus_iovec, sizeof(bogus_iovec));
 	struct iovec *lcl_iov   = tail_memdup(lcl_iovec,   sizeof(lcl_iovec));
 	struct iovec *rmt_iov   = tail_memdup(rmt_iovec,   sizeof(rmt_iovec));

 	struct print_iov_arg bogus_arg   = { ARRAY_SIZE(bogus_iovec), 1 };
 	struct print_iov_arg lcl_arg     = { ARRAY_SIZE(lcl_iovec), 1, 1, 0, 0,
 		2, {SEGM1_BASE, SEGM2_BASE}, {SIZE_1, SIZE_2} };
 	struct print_iov_arg rmt_arg     = { ARRAY_SIZE(rmt_iovec), 1 };

 	struct print_iov_arg bogus_arg_cut = {
 		ARRAY_SIZE(bogus_iovec) - 2, 1, 0, 1
 	};
 	struct print_iov_arg lcl_arg_cut = {
 		ARRAY_SIZE(lcl_iovec) - 2, 1, 1, 1, 0, 2,
 		{ SEGM1_BASE + SIZE_11 + SIZE_12, SEGM2_BASE },
 		{SIZE_13, SIZE_2}
 	};
 	struct print_iov_arg rmt_arg_cut = { ARRAY_SIZE(rmt_iovec) - 2, 1 };


 	fill_memory_ex(data1_out, SIZE_1, SEGM1_BASE, SIZE_1);
 	fill_memory_ex(data2_out, SIZE_2, SEGM2_BASE, SIZE_2);


 	do_call(bogus_pid, (kernel_ulong_t) (uintptr_t) ARG_STR(NULL),
 		bogus_iovcnt1, (kernel_ulong_t) (uintptr_t) ARG_STR(NULL),
 		bogus_iovcnt2, bogus_flags, NULL);

 	do_call(my_pid, ptr_cast(bogus_iov + ARRAY_SIZE(bogus_iovec)),
 		"[]", 0, ptr_cast(in_iov + ARRAY_SIZE(in_iovec)), "[]",
 		0, 0, NULL);
 	do_call(my_pid, ptr_cast(bogus_iov + ARRAY_SIZE(bogus_iovec)), NULL,
 		bogus_iovcnt1, ptr_cast(in_iov + ARRAY_SIZE(in_iovec)), NULL,
 		bogus_iovcnt2, 0, print_iov);

 	do_call(my_pid, ptr_cast(bogus_iov), (char *) &bogus_arg,
 		ARRAY_SIZE(bogus_iovec), ptr_cast(rmt_iov + 2),
 		(char *) &rmt_arg_cut, ARRAY_SIZE(rmt_iovec) - 2, 0, print_iov);

 #if !OP_WR
 	lcl_arg.check_rc = 1;
 	lcl_arg_cut.check_rc = 1;
 #endif

 	do_call(my_pid, ptr_cast(lcl_iov + 2), (char *) &lcl_arg_cut,
 		ARRAY_SIZE(lcl_iovec) - 1, ptr_cast(bogus_iov + 2),
 		(char *) &bogus_arg_cut, ARRAY_SIZE(bogus_iovec) - 1, 0,
 		print_iov);

 	lcl_arg_cut.addr_term = 0;

 	rmt_arg_cut.addr_term = 1;
 	rmt_arg_cut.count = 5;

 	do_call(my_pid, ptr_cast(lcl_iov + 2), (char *) &lcl_arg_cut,
 		ARRAY_SIZE(lcl_iovec) - 2, ptr_cast(rmt_iov + 1),
 		(char *) &rmt_arg_cut, ARRAY_SIZE(rmt_iovec), 0, print_iov);

 	/* Correct call */
 	do_call(my_pid, ptr_cast(lcl_iov), (char *) &lcl_arg,
 		ARRAY_SIZE(lcl_iovec), ptr_cast(rmt_iov), (char *) &rmt_arg,
 		ARRAY_SIZE(rmt_iovec), 0, print_iov);

 	puts("+++ exited with 0 +++");

 	return 0;
 }
	/*
	* Check decoding of process_vm_readv/process_vm_writev syscall.
	*
	* Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
	* Copyright (c) 2016-2018 The strace developers.
	* 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 <inttypes.h>
	#include <stdio.h>
	#include <unistd.h>
	#include <sys/uio.h>

	#if OP_WR
	# define in_iovec rmt_iovec
	# define out_iovec lcl_iovec
	# define in_iov rmt_iov
	# define out_iov lcl_iov
	#else
	# define in_iovec lcl_iovec
	# define out_iovec rmt_iovec
	# define in_iov lcl_iov
	# define out_iov rmt_iov
	#endif

	typedef void (iov_print_fn)(const struct iovec , const void *, long);

	enum { MAX_SEGM_COUNT = 2, MAX_STR_LEN = 5 };

	struct print_iov_arg {
	uint32_t count;
	uint32_t valid :1,
	string :1,
	addr_term:1,
	check_rc :1;
	uint32_t str_segms;
	uint8_t str_base[MAX_SEGM_COUNT];
	uint8_t str_size[MAX_SEGM_COUNT];
	};

	static void
	print_iov(const struct iovec iov, const void arg_ptr, long rc)
	{
	const struct print_iov_arg *arg = arg_ptr;
	uint32_t i;
	uint32_t num_segm = 0;
	uint64_t segm_offs = 0;

	if (!arg \|\| !arg->valid) {
	if (iov)
	printf("%p", iov);
	else
	printf("NULL");

	return;
	}

	printf("[");

	for (i = 0; i < arg->count; i++) {
	if (i)
	printf(", ");

	if (i >= MAX_STR_LEN) {
	printf("...");
	break;
	}

	printf("{iov_base=");
	if (arg->string && (!arg->check_rc \|\| (rc != -1))) {
	uint64_t str_left = iov[i].iov_len;
	uint64_t pr_count = 0;

	printf("\"");

	while (str_left--) {
	static const char oct_str[] = "01234567";
	uint8_t c = arg->str_base[num_segm] + segm_offs;

	if ((num_segm >= arg->str_segms) \|\|
	(num_segm >= MAX_SEGM_COUNT))
	error_msg_and_fail("print_iov: segment "
	"count overrun");

	if (pr_count++ < MAX_STR_LEN)
	printf("\\%.1s%.1s%d",
	(c >> 6) ?
	oct_str + (c >> 6) : "",
	(c >> 3) ?
	oct_str + ((c >> 3) & 7) : "",
	c & 7);

	segm_offs++;

	if (segm_offs >= arg->str_size[num_segm]) {
	num_segm++;
	segm_offs = 0;
	}
	}

	printf("\"");

	if (pr_count > MAX_STR_LEN)
	printf("...");
	} else {
	if (iov[i].iov_base)
	printf("%p", iov[i].iov_base);
	else
	printf("NULL");
	}

	printf(", iov_len=%zu}", iov[i].iov_len);
	}

	if (arg->addr_term)
	printf(", ... /* %p */", iov + arg->count);

	printf("]");
	}

	static void
	do_call(kernel_ulong_t pid,
	kernel_ulong_t local_iov, const char *local_arg,
	kernel_ulong_t liovcnt,
	kernel_ulong_t remote_iov, const char *remote_arg,
	kernel_ulong_t riovcnt,
	kernel_ulong_t flags, iov_print_fn pr_iov)
	{
	long rc;
	const char *errstr;

	rc = syscall(OP_NR, pid, local_iov, liovcnt, remote_iov, riovcnt,
	flags);
	errstr = sprintrc(rc);

	printf("%s(%d, ", OP_STR, (int) pid);

	if (pr_iov)
	pr_iov((const struct iovec *) (uintptr_t) local_iov, local_arg,
	rc);
	else
	printf("%s", local_arg);

	printf(", %lu, ", (unsigned long) liovcnt);

	if (pr_iov)
	pr_iov((const struct iovec *) (uintptr_t) remote_iov,
	remote_arg, rc);
	else
	printf("%s", remote_arg);

	printf(", %lu, %lu) = %s\n", (unsigned long) riovcnt,
	(unsigned long) flags, errstr);
	}

	kernel_ulong_t
	ptr_cast(void *ptr)
	{
	return (kernel_ulong_t) (uintptr_t) ptr;
	}

	int
	main(void)
	{
	enum {
	SIZE_11 = 2,
	SIZE_12 = 3,
	SIZE_13 = 4,
	SIZE_1 = SIZE_11 + SIZE_12 + SIZE_13,
	SIZE_21 = 5,
	SIZE_22 = 6,
	SIZE_23 = 7,
	SIZE_2 = SIZE_21 + SIZE_22 + SIZE_23,
	};

	enum {
	SEGM1_BASE = 0x80,
	SEGM2_BASE = 0xA0,
	};

	static const kernel_ulong_t bogus_pid =
	(kernel_ulong_t) 0xbadfaceddeadca57ULL;
	static const kernel_ulong_t bogus_iovcnt1 =
	(kernel_ulong_t) 0xdec0ded1defaced2ULL;
	static const kernel_ulong_t bogus_iovcnt2 =
	(kernel_ulong_t) 0xdec0ded3defaced4ULL;
	static const kernel_ulong_t bogus_flags =
	(kernel_ulong_t) 0xdeadc0deda7adeadULL;

	pid_t my_pid = getpid();
	char *data1_out = tail_alloc(SIZE_1);
	char *data2_out = tail_alloc(SIZE_2);
	char *data1_in = tail_alloc(SIZE_2);
	char *data2_in = tail_alloc(SIZE_1);

	struct iovec bogus_iovec[] = {
	{ data1_out + SIZE_1, (size_t) 0xdeadfaceca57beefULL },
	{ data1_in + SIZE_2, (size_t) 0xbadc0dedda7adeadULL },
	{ data2_out + SIZE_2, (size_t) 0xf157facedec0ded1ULL },
	{ data2_in + SIZE_1, (size_t) 0xdefaced2bea7be57ULL },
	};

	struct iovec out_iovec[] = {
	{ data1_out, SIZE_11 },
	{ data1_out + SIZE_11, SIZE_12 },
	{ data1_out + SIZE_11 + SIZE_12, SIZE_13 },
	{ data2_out, SIZE_21 },
	{ data2_out + SIZE_21, SIZE_22 },
	{ data2_out + SIZE_21 + SIZE_22, SIZE_23 },
	};
	struct iovec in_iovec[] = {
	{ data1_in, SIZE_23 },
	{ data1_in + SIZE_23, SIZE_22 },
	{ data1_in + SIZE_23 + SIZE_22, SIZE_21 },
	{ data2_in, SIZE_13 },
	{ data2_in + SIZE_13, SIZE_12 },
	{ data2_in + SIZE_13 + SIZE_12, SIZE_11 },
	};

	struct iovec *bogus_iov = tail_memdup(bogus_iovec, sizeof(bogus_iovec));
	struct iovec *lcl_iov = tail_memdup(lcl_iovec, sizeof(lcl_iovec));
	struct iovec *rmt_iov = tail_memdup(rmt_iovec, sizeof(rmt_iovec));

	struct print_iov_arg bogus_arg = { ARRAY_SIZE(bogus_iovec), 1 };
	struct print_iov_arg lcl_arg = { ARRAY_SIZE(lcl_iovec), 1, 1, 0, 0,
	2, {SEGM1_BASE, SEGM2_BASE}, {SIZE_1, SIZE_2} };
	struct print_iov_arg rmt_arg = { ARRAY_SIZE(rmt_iovec), 1 };

	struct print_iov_arg bogus_arg_cut = {
	ARRAY_SIZE(bogus_iovec) - 2, 1, 0, 1
	};
	struct print_iov_arg lcl_arg_cut = {
	ARRAY_SIZE(lcl_iovec) - 2, 1, 1, 1, 0, 2,
	{ SEGM1_BASE + SIZE_11 + SIZE_12, SEGM2_BASE },
	{SIZE_13, SIZE_2}
	};
	struct print_iov_arg rmt_arg_cut = { ARRAY_SIZE(rmt_iovec) - 2, 1 };


	fill_memory_ex(data1_out, SIZE_1, SEGM1_BASE, SIZE_1);
	fill_memory_ex(data2_out, SIZE_2, SEGM2_BASE, SIZE_2);


	do_call(bogus_pid, (kernel_ulong_t) (uintptr_t) ARG_STR(NULL),
	bogus_iovcnt1, (kernel_ulong_t) (uintptr_t) ARG_STR(NULL),
	bogus_iovcnt2, bogus_flags, NULL);

	do_call(my_pid, ptr_cast(bogus_iov + ARRAY_SIZE(bogus_iovec)),
	"[]", 0, ptr_cast(in_iov + ARRAY_SIZE(in_iovec)), "[]",
	0, 0, NULL);
	do_call(my_pid, ptr_cast(bogus_iov + ARRAY_SIZE(bogus_iovec)), NULL,
	bogus_iovcnt1, ptr_cast(in_iov + ARRAY_SIZE(in_iovec)), NULL,
	bogus_iovcnt2, 0, print_iov);

	do_call(my_pid, ptr_cast(bogus_iov), (char *) &bogus_arg,
	ARRAY_SIZE(bogus_iovec), ptr_cast(rmt_iov + 2),
	(char *) &rmt_arg_cut, ARRAY_SIZE(rmt_iovec) - 2, 0, print_iov);

	#if !OP_WR
	lcl_arg.check_rc = 1;
	lcl_arg_cut.check_rc = 1;
	#endif

	do_call(my_pid, ptr_cast(lcl_iov + 2), (char *) &lcl_arg_cut,
	ARRAY_SIZE(lcl_iovec) - 1, ptr_cast(bogus_iov + 2),
	(char *) &bogus_arg_cut, ARRAY_SIZE(bogus_iovec) - 1, 0,
	print_iov);

	lcl_arg_cut.addr_term = 0;

	rmt_arg_cut.addr_term = 1;
	rmt_arg_cut.count = 5;

	do_call(my_pid, ptr_cast(lcl_iov + 2), (char *) &lcl_arg_cut,
	ARRAY_SIZE(lcl_iovec) - 2, ptr_cast(rmt_iov + 1),
	(char *) &rmt_arg_cut, ARRAY_SIZE(rmt_iovec), 0, print_iov);

	/* Correct call */
	do_call(my_pid, ptr_cast(lcl_iov), (char *) &lcl_arg,
	ARRAY_SIZE(lcl_iovec), ptr_cast(rmt_iov), (char *) &rmt_arg,
	ARRAY_SIZE(rmt_iovec), 0, print_iov);

	puts("+++ exited with 0 +++");

	return 0;
	}