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strace/io.c
Mike Frysinger 0cbed357ab Decode mtd ioctls 
I got tired of figuring out mtd structures (which show up a lot
in the embedded space), so add decoders for those ioctls.

* defs.h (mtd_ioctl): New prototype.
(print_loff_t): Likewise.
* io.c (print_loff_t): Delete static keyword
* ioctl.c (ioctl_decode): Call mtd_ioctl when code is 'M'.
* Makefile.am (strace_SOURCES): Add mtd.c.
(EXTRA_DIST): Add linux/mtd-abi.h.
* mtd.c: New file.
* linux/mtd-abi.h: New file.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2012-04-06 14:39:15 +00:00

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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, 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>
#if HAVE_SYS_UIO_H
# include <sys/uio.h>
#endif
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;
}
#if HAVE_SYS_UIO_H
void
tprint_iov(struct tcb *tcp, unsigned long len, unsigned long addr, int decode_iov)
{
#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)
printstr(tcp, (long) iov_iov_base, iov_iov_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
}
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;
}
#endif
/* 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;
}
#if HAVE_SYS_UIO_H
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]);
printllval(tcp, "%llu", PREAD_OFFSET_ARG);
}
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]);
printllval(tcp, "%llu", PREAD_OFFSET_ARG);
}
return 0;
}
#endif /* HAVE_SYS_UIO_H */
int
sys_sendfile(struct tcb *tcp)
{
if (entering(tcp)) {
off_t offset;
printfd(tcp, tcp->u_arg[0]);
tprints(", ");
printfd(tcp, tcp->u_arg[1]);
tprints(", ");
if (!tcp->u_arg[2])
tprints("NULL");
else if (umove(tcp, tcp->u_arg[2], &offset) < 0)
tprintf("%#lx", tcp->u_arg[2]);
else
#ifdef HAVE_LONG_LONG_OFF_T
tprintf("[%llu]", offset);
#else
tprintf("[%lu]", offset);
#endif
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;
}
static const struct xlat splice_flags[] = {
#ifdef SPLICE_F_MOVE
{ SPLICE_F_MOVE, "SPLICE_F_MOVE" },
#endif
#ifdef SPLICE_F_NONBLOCK
{ SPLICE_F_NONBLOCK, "SPLICE_F_NONBLOCK" },
#endif
#ifdef SPLICE_F_MORE
{ SPLICE_F_MORE, "SPLICE_F_MORE" },
#endif
#ifdef SPLICE_F_GIFT
{ SPLICE_F_GIFT, "SPLICE_F_GIFT" },
#endif
{ 0, NULL },
};
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(", ");
iop = ioctl_lookup(tcp->u_arg[1]);
if (iop) {
tprints(iop->symbol);
while ((iop = ioctl_next_match(iop)))
tprintf(" or %s", iop->symbol);
} else
tprintf("%#lx", 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;
}
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