/*
* 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/file.h>
#ifdef HAVE_SYS_EPOLL_H
# include <sys/epoll.h>
#endif
#ifdef HAVE_LINUX_PERF_EVENT_H
# include <linux/perf_event.h>
#endif
#include "xlat/fcntlcmds.h"
#include "xlat/fdflags.h"
#include "xlat/flockcmds.h"
#include "xlat/lockfcmds.h"
#include "xlat/notifyflags.h"
#include "xlat/perf_event_open_flags.h"
/*
* Assume that F_SETLK64, F_SETLKW64, and F_GETLK64 are either defined
* or not defined altogether.
*/
#if defined(F_SETLK64) && F_SETLK64 + 0 != F_SETLK
# define USE_PRINTFLOCK64 1
#else
# define USE_PRINTFLOCK64 0
#endif
#if USE_PRINTFLOCK64
# ifndef HAVE_STRUCT_FLOCK64
struct flock64 {
short int l_type, l_whence;
int64_t l_start, l_len;
int l_pid;
};
# endif
static void
printflock64(struct tcb *tcp, long addr, int getlk)
{
struct flock64 fl;
if (umove(tcp, addr, &fl) < 0) {
tprints("{...}");
return;
}
tprints("{type=");
printxval(lockfcmds, fl.l_type, "F_???");
tprints(", whence=");
printxval(whence_codes, fl.l_whence, "SEEK_???");
tprintf(", start=%lld, len=%lld", (long long) fl.l_start, (long long) fl.l_len);
if (getlk)
tprintf(", pid=%lu}", (unsigned long) fl.l_pid);
else
tprints("}");
}
#endif /* USE_PRINTFLOCK64 */
static void
printflock(struct tcb *tcp, long addr, int getlk)
{
struct flock fl;
int r;
#if SUPPORTED_PERSONALITIES > 1
if (
# if SIZEOF_OFF_T > SIZEOF_LONG
current_personality > 0 &&
#endif
current_wordsize != sizeof(fl.l_start)) {
if (current_wordsize == 4) {
/* 32-bit x86 app on x86_64 and similar cases */
struct {
short int l_type;
short int l_whence;
int32_t l_start; /* off_t */
int32_t l_len; /* off_t */
int32_t l_pid; /* pid_t */
} fl32;
r = umove(tcp, addr, &fl32);
if (r >= 0) {
fl.l_type = fl32.l_type;
fl.l_whence = fl32.l_whence;
fl.l_start = fl32.l_start;
fl.l_len = fl32.l_len;
fl.l_pid = fl32.l_pid;
}
} else {
/* let people know we have a problem here */
tprintf("<decode error: unsupported wordsize %d>",
current_wordsize);
return;
}
} else
#endif
{
r = umove(tcp, addr, &fl);
}
if (r < 0) {
tprints("{...}");
return;
}
tprints("{type=");
printxval(lockfcmds, fl.l_type, "F_???");
tprints(", whence=");
printxval(whence_codes, fl.l_whence, "SEEK_???");
#if SIZEOF_OFF_T > SIZEOF_LONG
tprintf(", start=%lld, len=%lld", fl.l_start, fl.l_len);
#else
tprintf(", start=%ld, len=%ld", fl.l_start, fl.l_len);
#endif
if (getlk)
tprintf(", pid=%lu}", (unsigned long) fl.l_pid);
else
tprints("}");
}
int
sys_fcntl(struct tcb *tcp)
{
if (entering(tcp)) {
printfd(tcp, tcp->u_arg[0]);
tprints(", ");
printxval(fcntlcmds, tcp->u_arg[1], "F_???");
switch (tcp->u_arg[1]) {
case F_SETFD:
tprints(", ");
printflags(fdflags, tcp->u_arg[2], "FD_???");
break;
case F_SETOWN: case F_DUPFD:
#ifdef F_DUPFD_CLOEXEC
case F_DUPFD_CLOEXEC:
#endif
tprintf(", %ld", tcp->u_arg[2]);
break;
case F_SETFL:
tprints(", ");
tprint_open_modes(tcp->u_arg[2]);
break;
case F_SETLK: case F_SETLKW:
tprints(", ");
printflock(tcp, tcp->u_arg[2], 0);
break;
#if USE_PRINTFLOCK64
case F_SETLK64: case F_SETLKW64:
tprints(", ");
printflock64(tcp, tcp->u_arg[2], 0);
break;
#endif /* USE_PRINTFLOCK64 */
#ifdef F_NOTIFY
case F_NOTIFY:
tprints(", ");
printflags(notifyflags, tcp->u_arg[2], "DN_???");
break;
#endif
#ifdef F_SETLEASE
case F_SETLEASE:
tprints(", ");
printxval(lockfcmds, tcp->u_arg[2], "F_???");
break;
#endif
}
}
else {
switch (tcp->u_arg[1]) {
case F_DUPFD:
#ifdef F_DUPFD_CLOEXEC
case F_DUPFD_CLOEXEC:
#endif
case F_SETFD: case F_SETFL:
case F_SETLK: case F_SETLKW:
case F_SETOWN: case F_GETOWN:
#ifdef F_NOTIFY
case F_NOTIFY:
#endif
#ifdef F_SETLEASE
case F_SETLEASE:
#endif
break;
case F_GETFD:
if (syserror(tcp) || tcp->u_rval == 0)
return 0;
tcp->auxstr = sprintflags("flags ", fdflags, tcp->u_rval);
return RVAL_HEX|RVAL_STR;
case F_GETFL:
if (syserror(tcp))
return 0;
tcp->auxstr = sprint_open_modes(tcp->u_rval);
return RVAL_HEX|RVAL_STR;
case F_GETLK:
tprints(", ");
printflock(tcp, tcp->u_arg[2], 1);
break;
#if USE_PRINTFLOCK64
case F_GETLK64:
tprints(", ");
printflock64(tcp, tcp->u_arg[2], 1);
break;
#endif
#ifdef F_GETLEASE
case F_GETLEASE:
if (syserror(tcp))
return 0;
tcp->auxstr = xlookup(lockfcmds, tcp->u_rval);
return RVAL_HEX|RVAL_STR;
#endif
default:
tprintf(", %#lx", tcp->u_arg[2]);
break;
}
}
return 0;
}
#ifdef LOCK_SH
int
sys_flock(struct tcb *tcp)
{
if (entering(tcp)) {
printfd(tcp, tcp->u_arg[0]);
tprints(", ");
printflags(flockcmds, tcp->u_arg[1], "LOCK_???");
}
return 0;
}
#endif /* LOCK_SH */
int
sys_close(struct tcb *tcp)
{
if (entering(tcp)) {
printfd(tcp, tcp->u_arg[0]);
}
return 0;
}
int
sys_dup(struct tcb *tcp)
{
if (entering(tcp)) {
printfd(tcp, tcp->u_arg[0]);
}
return RVAL_FD;
}
static int
do_dup2(struct tcb *tcp, int flags_arg)
{
if (entering(tcp)) {
printfd(tcp, tcp->u_arg[0]);
tprints(", ");
printfd(tcp, tcp->u_arg[1]);
if (flags_arg >= 0) {
tprints(", ");
printflags(open_mode_flags, tcp->u_arg[flags_arg], "O_???");
}
}
return RVAL_FD;
}
int
sys_dup2(struct tcb *tcp)
{
return do_dup2(tcp, -1);
}
int
sys_dup3(struct tcb *tcp)
{
return do_dup2(tcp, 2);
}
#if defined(ALPHA)
int
sys_getdtablesize(struct tcb *tcp)
{
return 0;
}
#endif
static int
decode_select(struct tcb *tcp, long *args, enum bitness_t bitness)
{
int i, j;
int nfds, fdsize;
fd_set *fds;
const char *sep;
long arg;
/* Kernel truncates arg[0] to int, we do the same. */
nfds = (int) args[0];
/* Kernel rejects negative nfds, so we don't parse it either. */
if (nfds < 0) {
nfds = 0;
fds = NULL;
}
/* Beware of select(2^31-1, NULL, NULL, NULL) and similar... */
if (nfds > 1024*1024)
nfds = 1024*1024;
/*
* We had bugs a-la "while (j < args[0])" and "umoven(args[0])" below.
* Instead of args[0], use nfds for fd count, fdsize for array lengths.
*/
fdsize = (((nfds + 7) / 8) + current_wordsize-1) & -current_wordsize;
if (entering(tcp)) {
tprintf("%d", (int) args[0]);
if (fdsize > 0) {
fds = malloc(fdsize);
if (!fds)
die_out_of_memory();
}
for (i = 0; i < 3; i++) {
arg = args[i+1];
if (arg == 0) {
tprints(", NULL");
continue;
}
if (!verbose(tcp) || !fds) {
tprintf(", %#lx", arg);
continue;
}
if (umoven(tcp, arg, fdsize, (char *) fds) < 0) {
tprints(", [?]");
continue;
}
tprints(", [");
for (j = 0, sep = "";; j++) {
j = next_set_bit(fds, j, nfds);
if (j < 0)
break;
tprints(sep);
printfd(tcp, j);
sep = " ";
}
tprints("]");
}
free(fds);
tprints(", ");
printtv_bitness(tcp, args[4], bitness, 0);
}
else {
static char outstr[1024];
char *outptr;
#define end_outstr (outstr + sizeof(outstr))
int ready_fds;
if (syserror(tcp))
return 0;
ready_fds = tcp->u_rval;
if (ready_fds == 0) {
tcp->auxstr = "Timeout";
return RVAL_STR;
}
fds = malloc(fdsize);
if (!fds)
die_out_of_memory();
outptr = outstr;
sep = "";
for (i = 0; i < 3 && ready_fds > 0; i++) {
int first = 1;
arg = args[i+1];
if (!arg || umoven(tcp, arg, fdsize, (char *) fds) < 0)
continue;
for (j = 0;; j++) {
j = next_set_bit(fds, j, nfds);
if (j < 0)
break;
/* +2 chars needed at the end: ']',NUL */
if (outptr < end_outstr - (sizeof(", except [") + sizeof(int)*3 + 2)) {
if (first) {
outptr += sprintf(outptr, "%s%s [%u",
sep,
i == 0 ? "in" : i == 1 ? "out" : "except",
j
);
first = 0;
sep = ", ";
}
else {
outptr += sprintf(outptr, " %u", j);
}
}
if (--ready_fds == 0)
break;
}
if (outptr != outstr)
*outptr++ = ']';
}
free(fds);
/* This contains no useful information on SunOS. */
if (args[4]) {
if (outptr < end_outstr - (10 + TIMEVAL_TEXT_BUFSIZE)) {
outptr += sprintf(outptr, "%sleft ", sep);
outptr = sprinttv(outptr, tcp, args[4], bitness, /*special:*/ 0);
}
}
*outptr = '\0';
tcp->auxstr = outstr;
return RVAL_STR;
#undef end_outstr
}
return 0;
}
int
sys_oldselect(struct tcb *tcp)
{
long args[5];
if (umoven(tcp, tcp->u_arg[0], sizeof args, (char *) args) < 0) {
tprints("[...]");
return 0;
}
return decode_select(tcp, args, BITNESS_CURRENT);
}
#ifdef ALPHA
int
sys_osf_select(struct tcb *tcp)
{
long *args = tcp->u_arg;
return decode_select(tcp, args, BITNESS_32);
}
#endif
#include "xlat/epollctls.h"
#include "xlat/epollevents.h"
#include "xlat/epollflags.h"
/* Not aliased to printargs_ld: we want it to have a distinct address */
int
sys_epoll_create(struct tcb *tcp)
{
return printargs_ld(tcp);
}
int
sys_epoll_create1(struct tcb *tcp)
{
if (entering(tcp))
printflags(epollflags, tcp->u_arg[0], "EPOLL_???");
return 0;
}
#ifdef HAVE_SYS_EPOLL_H
static void
print_epoll_event(struct epoll_event *ev)
{
tprints("{");
printflags(epollevents, ev->events, "EPOLL???");
/* We cannot know what format the program uses, so print u32 and u64
which will cover every value. */
tprintf(", {u32=%" PRIu32 ", u64=%" PRIu64 "}}",
ev->data.u32, ev->data.u64);
}
#endif
int
sys_epoll_ctl(struct tcb *tcp)
{
if (entering(tcp)) {
printfd(tcp, tcp->u_arg[0]);
tprints(", ");
printxval(epollctls, tcp->u_arg[1], "EPOLL_CTL_???");
tprints(", ");
printfd(tcp, tcp->u_arg[2]);
tprints(", ");
if (tcp->u_arg[3] == 0)
tprints("NULL");
else {
#ifdef HAVE_SYS_EPOLL_H
struct epoll_event ev;
if (
#ifdef EPOLL_CTL_DEL
(tcp->u_arg[1] != EPOLL_CTL_DEL) &&
#endif
umove(tcp, tcp->u_arg[3], &ev) == 0)
print_epoll_event(&ev);
else
#endif
tprintf("%lx", tcp->u_arg[3]);
}
}
return 0;
}
static void
epoll_wait_common(struct tcb *tcp)
{
if (entering(tcp)) {
printfd(tcp, tcp->u_arg[0]);
tprints(", ");
} else {
if (syserror(tcp))
tprintf("%lx", tcp->u_arg[1]);
else if (tcp->u_rval == 0)
tprints("{}");
else {
#ifdef HAVE_SYS_EPOLL_H
struct epoll_event ev, *start, *cur, *end;
int failed = 0;
tprints("{");
start = (struct epoll_event *) tcp->u_arg[1];
end = start + tcp->u_rval;
for (cur = start; cur < end; ++cur) {
if (cur > start)
tprints(", ");
if (umove(tcp, (long) cur, &ev) == 0)
print_epoll_event(&ev);
else {
tprints("?");
failed = 1;
break;
}
}
tprints("}");
if (failed)
tprintf(" %#lx", (long) start);
#else
tprints("{...}");
#endif
}
tprintf(", %d, %d", (int) tcp->u_arg[2], (int) tcp->u_arg[3]);
}
}
int
sys_epoll_wait(struct tcb *tcp)
{
epoll_wait_common(tcp);
return 0;
}
int
sys_epoll_pwait(struct tcb *tcp)
{
epoll_wait_common(tcp);
if (exiting(tcp)) {
tprints(", ");
/* NB: kernel requires arg[5] == NSIG / 8 */
print_sigset_addr_len(tcp, tcp->u_arg[4], tcp->u_arg[5]);
tprintf(", %lu", tcp->u_arg[5]);
}
return 0;
}
int
sys_select(struct tcb *tcp)
{
return decode_select(tcp, tcp->u_arg, BITNESS_CURRENT);
}
int
sys_pselect6(struct tcb *tcp)
{
int rc = decode_select(tcp, tcp->u_arg, BITNESS_CURRENT);
if (entering(tcp)) {
long r;
struct {
unsigned long ptr;
unsigned long len;
} data;
#if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
if (current_wordsize == 4) {
struct {
uint32_t ptr;
uint32_t len;
} data32;
r = umove(tcp, tcp->u_arg[5], &data32);
data.ptr = data32.ptr;
data.len = data32.len;
} else
#endif
r = umove(tcp, tcp->u_arg[5], &data);
if (r < 0)
tprintf(", %#lx", tcp->u_arg[5]);
else {
tprints(", {");
/* NB: kernel requires data.len == NSIG / 8 */
print_sigset_addr_len(tcp, data.ptr, data.len);
tprintf(", %lu}", data.len);
}
}
return rc;
}
static int
do_eventfd(struct tcb *tcp, int flags_arg)
{
if (entering(tcp)) {
tprintf("%lu", tcp->u_arg[0]);
if (flags_arg >= 0) {
tprints(", ");
printflags(open_mode_flags, tcp->u_arg[flags_arg], "O_???");
}
}
return 0;
}
int
sys_eventfd(struct tcb *tcp)
{
return do_eventfd(tcp, -1);
}
int
sys_eventfd2(struct tcb *tcp)
{
return do_eventfd(tcp, 1);
}
int
sys_perf_event_open(struct tcb *tcp)
{
if (entering(tcp)) {
tprintf("%#lx, %d, %d, %d, ",
tcp->u_arg[0],
(int) tcp->u_arg[1],
(int) tcp->u_arg[2],
(int) tcp->u_arg[3]);
printflags(perf_event_open_flags, tcp->u_arg[4],
"PERF_FLAG_???");
}
return 0;
}