strace/kcmp.c

/*
 * Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
 * 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 "xlat/kcmp_types.h"

SYS_FUNC(kcmp)
{
	pid_t pid1 = tcp->u_arg[0];
	pid_t pid2 = tcp->u_arg[1];
	int type = tcp->u_arg[2];
	unsigned long long idx1 = getarg_ull(tcp, 3);
	unsigned long long idx2 = getarg_ull(tcp, 4);

	tprintf("%d, %d, ", pid1, pid2);
	printxval(kcmp_types, type, "KCMP_???");

	switch(type) {
		case KCMP_FILE:
			tprintf(", %u, %u", (unsigned) idx1, (unsigned) idx2);
			break;
		case KCMP_FILES:
		case KCMP_FS:
		case KCMP_IO:
		case KCMP_SIGHAND:
		case KCMP_SYSVSEM:
		case KCMP_VM:
			break;
		default:
			tprintf(", %#llx, %#llx", idx1, idx2);
	}

	return RVAL_DECODED;
}