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/*
* Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
* Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
* Copyright (c) 1993-1996 Rick Sladkey <jrs@world.std.com>
* Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
* Copyright (c) 2007 Roland McGrath <roland@redhat.com>
* Copyright (c) 2011-2012 Denys Vlasenko <vda.linux@googlemail.com>
* Copyright (c) 2010-2015 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"
static void
printargv(struct tcb *tcp, long addr)
{
if (!addr || !verbose(tcp)) {
printaddr(addr);
return;
}
const char *const start_sep = "[";
const char *sep = start_sep;
const unsigned int wordsize = current_wordsize;
unsigned int n;
for (n = 0; addr; sep = ", ", addr += wordsize, ++n) {
union {
unsigned int p32;
unsigned long p64;
char data[sizeof(long)];
} cp;
if (umoven(tcp, addr, wordsize, cp.data)) {
if (sep == start_sep)
printaddr(addr);
else
tprints(", ???]");
return;
}
if (!(wordsize < sizeof(cp.p64) ? cp.p32 : cp.p64)) {
if (sep == start_sep)
tprints(start_sep);
break;
}
if (abbrev(tcp) && n >= max_strlen) {
tprintf("%s...", sep);
break;
}
tprints(sep);
printstr(tcp, wordsize < sizeof(cp.p64) ? cp.p32 : cp.p64, -1);
}
tprints("]");
}
static void
printargc(struct tcb *tcp, long addr)
{
if (!addr || !verbose(tcp)) {
printaddr(addr);
return;
}
bool unterminated = false;
unsigned int count = 0;
char *cp = NULL;
for (; addr; addr += current_wordsize, ++count) {
if (umoven(tcp, addr, current_wordsize, &cp)) {
if (count) {
unterminated = true;
break;
}
printaddr(addr);
return;
}
if (!cp)
break;
}
tprintf("[/* %u var%s%s */]",
count, count == 1 ? "" : "s",
unterminated ? ", unterminated" : "");
}
static void
decode_execve(struct tcb *tcp, const unsigned int index)
{
printpath(tcp, tcp->u_arg[index + 0]);
tprints(", ");
printargv(tcp, tcp->u_arg[index + 1]);
tprints(", ");
(abbrev(tcp) ? printargc : printargv) (tcp, tcp->u_arg[index + 2]);
}
SYS_FUNC(execve)
{
decode_execve(tcp, 0);
return RVAL_DECODED;
}
SYS_FUNC(execveat)
{
print_dirfd(tcp, tcp->u_arg[0]);
decode_execve(tcp, 1);
tprints(", ");
printflags(at_flags, tcp->u_arg[4], "AT_???");
return RVAL_DECODED;
}
#if defined(SPARC) || defined(SPARC64)
SYS_FUNC(execv)
{
printpath(tcp, tcp->u_arg[0]);
tprints(", ");
printargv(tcp, tcp->u_arg[1]);
return RVAL_DECODED;
}
#endif /* SPARC || SPARC64 */
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