64aa1b1e2d
* defs.h (RVAL_FD): New macro. (RVAL_MASK, RVAL_STR, RVAL_NONE): Update. * desc.c (sys_dup, sys_delete_module): New functions. (do_dup2, decode_open, sys_creat): Change return value to RVAL_FD. * linux/dummy.h (sys_delete_module, sys_dup): Remove. * linux/syscall.h (sys_delete_module, sys_dup): New prototypes. * syscall.c (trace_syscall_exiting): Handle RVAL_FD. Signed-off-by: Zubin Mithra <zubin.mithra@gmail.com>
666 lines
14 KiB
C
666 lines
14 KiB
C
/*
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* Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
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* Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
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* Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
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* Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "defs.h"
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#include <fcntl.h>
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#include <sys/file.h>
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#ifdef HAVE_SYS_EPOLL_H
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# include <sys/epoll.h>
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#endif
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#ifdef HAVE_LINUX_PERF_EVENT_H
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# include <linux/perf_event.h>
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#endif
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#include "xlat/fcntlcmds.h"
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#include "xlat/fdflags.h"
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#include "xlat/flockcmds.h"
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#include "xlat/lockfcmds.h"
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#include "xlat/notifyflags.h"
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#include "xlat/perf_event_open_flags.h"
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/*
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* Assume that F_SETLK64, F_SETLKW64, and F_GETLK64 are either defined
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* or not defined altogether.
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*/
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#if defined(F_SETLK64) && F_SETLK64 + 0 != F_SETLK
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# define USE_PRINTFLOCK64 1
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#else
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# define USE_PRINTFLOCK64 0
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#endif
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#if USE_PRINTFLOCK64
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# ifndef HAVE_STRUCT_FLOCK64
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struct flock64 {
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short int l_type, l_whence;
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int64_t l_start, l_len;
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int l_pid;
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};
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# endif
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static void
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printflock64(struct tcb *tcp, long addr, int getlk)
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{
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struct flock64 fl;
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if (umove(tcp, addr, &fl) < 0) {
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tprints("{...}");
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return;
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}
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tprints("{type=");
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printxval(lockfcmds, fl.l_type, "F_???");
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tprints(", whence=");
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printxval(whence_codes, fl.l_whence, "SEEK_???");
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tprintf(", start=%lld, len=%lld", (long long) fl.l_start, (long long) fl.l_len);
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if (getlk)
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tprintf(", pid=%lu}", (unsigned long) fl.l_pid);
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else
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tprints("}");
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}
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#endif /* USE_PRINTFLOCK64 */
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static void
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printflock(struct tcb *tcp, long addr, int getlk)
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{
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struct flock fl;
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int r;
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#if SUPPORTED_PERSONALITIES > 1
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if (
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# if SIZEOF_OFF_T > SIZEOF_LONG
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current_personality > 0 &&
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#endif
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current_wordsize != sizeof(fl.l_start)) {
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if (current_wordsize == 4) {
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/* 32-bit x86 app on x86_64 and similar cases */
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struct {
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short int l_type;
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short int l_whence;
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int32_t l_start; /* off_t */
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int32_t l_len; /* off_t */
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int32_t l_pid; /* pid_t */
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} fl32;
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r = umove(tcp, addr, &fl32);
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if (r >= 0) {
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fl.l_type = fl32.l_type;
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fl.l_whence = fl32.l_whence;
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fl.l_start = fl32.l_start;
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fl.l_len = fl32.l_len;
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fl.l_pid = fl32.l_pid;
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}
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} else {
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/* let people know we have a problem here */
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tprintf("<decode error: unsupported wordsize %d>",
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current_wordsize);
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return;
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}
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} else
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#endif
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{
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r = umove(tcp, addr, &fl);
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}
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if (r < 0) {
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tprints("{...}");
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return;
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}
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tprints("{type=");
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printxval(lockfcmds, fl.l_type, "F_???");
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tprints(", whence=");
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printxval(whence_codes, fl.l_whence, "SEEK_???");
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#if SIZEOF_OFF_T > SIZEOF_LONG
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tprintf(", start=%lld, len=%lld", fl.l_start, fl.l_len);
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#else
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tprintf(", start=%ld, len=%ld", fl.l_start, fl.l_len);
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#endif
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if (getlk)
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tprintf(", pid=%lu}", (unsigned long) fl.l_pid);
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else
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tprints("}");
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}
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int
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sys_fcntl(struct tcb *tcp)
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{
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if (entering(tcp)) {
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printfd(tcp, tcp->u_arg[0]);
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tprints(", ");
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printxval(fcntlcmds, tcp->u_arg[1], "F_???");
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switch (tcp->u_arg[1]) {
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case F_SETFD:
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tprints(", ");
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printflags(fdflags, tcp->u_arg[2], "FD_???");
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break;
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case F_SETOWN: case F_DUPFD:
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#ifdef F_DUPFD_CLOEXEC
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case F_DUPFD_CLOEXEC:
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#endif
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tprintf(", %ld", tcp->u_arg[2]);
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break;
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case F_SETFL:
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tprints(", ");
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tprint_open_modes(tcp->u_arg[2]);
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break;
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case F_SETLK: case F_SETLKW:
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tprints(", ");
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printflock(tcp, tcp->u_arg[2], 0);
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break;
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#if USE_PRINTFLOCK64
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case F_SETLK64: case F_SETLKW64:
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tprints(", ");
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printflock64(tcp, tcp->u_arg[2], 0);
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break;
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#endif /* USE_PRINTFLOCK64 */
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#ifdef F_NOTIFY
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case F_NOTIFY:
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tprints(", ");
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printflags(notifyflags, tcp->u_arg[2], "DN_???");
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break;
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#endif
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#ifdef F_SETLEASE
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case F_SETLEASE:
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tprints(", ");
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printxval(lockfcmds, tcp->u_arg[2], "F_???");
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break;
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#endif
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}
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}
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else {
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switch (tcp->u_arg[1]) {
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case F_DUPFD:
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#ifdef F_DUPFD_CLOEXEC
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case F_DUPFD_CLOEXEC:
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#endif
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case F_SETFD: case F_SETFL:
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case F_SETLK: case F_SETLKW:
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case F_SETOWN: case F_GETOWN:
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#ifdef F_NOTIFY
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case F_NOTIFY:
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#endif
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#ifdef F_SETLEASE
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case F_SETLEASE:
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#endif
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break;
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case F_GETFD:
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if (syserror(tcp) || tcp->u_rval == 0)
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return 0;
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tcp->auxstr = sprintflags("flags ", fdflags, tcp->u_rval);
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return RVAL_HEX|RVAL_STR;
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case F_GETFL:
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if (syserror(tcp))
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return 0;
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tcp->auxstr = sprint_open_modes(tcp->u_rval);
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return RVAL_HEX|RVAL_STR;
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case F_GETLK:
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tprints(", ");
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printflock(tcp, tcp->u_arg[2], 1);
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break;
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#if USE_PRINTFLOCK64
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case F_GETLK64:
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tprints(", ");
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printflock64(tcp, tcp->u_arg[2], 1);
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break;
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#endif
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#ifdef F_GETLEASE
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case F_GETLEASE:
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if (syserror(tcp))
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return 0;
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tcp->auxstr = xlookup(lockfcmds, tcp->u_rval);
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return RVAL_HEX|RVAL_STR;
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#endif
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default:
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tprintf(", %#lx", tcp->u_arg[2]);
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break;
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}
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}
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return 0;
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}
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#ifdef LOCK_SH
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int
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sys_flock(struct tcb *tcp)
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{
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if (entering(tcp)) {
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printfd(tcp, tcp->u_arg[0]);
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tprints(", ");
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printflags(flockcmds, tcp->u_arg[1], "LOCK_???");
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}
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return 0;
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}
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#endif /* LOCK_SH */
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int
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sys_close(struct tcb *tcp)
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{
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if (entering(tcp)) {
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printfd(tcp, tcp->u_arg[0]);
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}
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return 0;
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}
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int
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sys_dup(struct tcb *tcp)
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{
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if (entering(tcp)) {
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printfd(tcp, tcp->u_arg[0]);
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}
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return RVAL_FD;
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}
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static int
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do_dup2(struct tcb *tcp, int flags_arg)
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{
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if (entering(tcp)) {
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printfd(tcp, tcp->u_arg[0]);
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tprints(", ");
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printfd(tcp, tcp->u_arg[1]);
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if (flags_arg >= 0) {
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tprints(", ");
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printflags(open_mode_flags, tcp->u_arg[flags_arg], "O_???");
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}
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}
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return RVAL_FD;
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}
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int
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sys_dup2(struct tcb *tcp)
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{
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return do_dup2(tcp, -1);
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}
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int
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sys_dup3(struct tcb *tcp)
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{
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return do_dup2(tcp, 2);
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}
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#if defined(ALPHA)
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int
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sys_getdtablesize(struct tcb *tcp)
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{
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return 0;
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}
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#endif
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static int
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decode_select(struct tcb *tcp, long *args, enum bitness_t bitness)
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{
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int i, j;
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int nfds, fdsize;
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fd_set *fds;
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const char *sep;
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long arg;
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/* Kernel truncates arg[0] to int, we do the same. */
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nfds = (int) args[0];
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/* Kernel rejects negative nfds, so we don't parse it either. */
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if (nfds < 0) {
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nfds = 0;
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fds = NULL;
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}
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/* Beware of select(2^31-1, NULL, NULL, NULL) and similar... */
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if (nfds > 1024*1024)
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nfds = 1024*1024;
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/*
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* We had bugs a-la "while (j < args[0])" and "umoven(args[0])" below.
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* Instead of args[0], use nfds for fd count, fdsize for array lengths.
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*/
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fdsize = (((nfds + 7) / 8) + current_wordsize-1) & -current_wordsize;
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if (entering(tcp)) {
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tprintf("%d", (int) args[0]);
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if (fdsize > 0) {
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fds = malloc(fdsize);
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if (!fds)
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die_out_of_memory();
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}
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for (i = 0; i < 3; i++) {
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arg = args[i+1];
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if (arg == 0) {
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tprints(", NULL");
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continue;
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}
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if (!verbose(tcp) || !fds) {
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tprintf(", %#lx", arg);
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continue;
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}
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if (umoven(tcp, arg, fdsize, (char *) fds) < 0) {
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tprints(", [?]");
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continue;
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}
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tprints(", [");
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for (j = 0, sep = "";; j++) {
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j = next_set_bit(fds, j, nfds);
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if (j < 0)
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break;
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tprints(sep);
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printfd(tcp, j);
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sep = " ";
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}
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tprints("]");
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}
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free(fds);
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tprints(", ");
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printtv_bitness(tcp, args[4], bitness, 0);
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}
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else {
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static char outstr[1024];
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char *outptr;
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#define end_outstr (outstr + sizeof(outstr))
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int ready_fds;
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if (syserror(tcp))
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return 0;
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ready_fds = tcp->u_rval;
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if (ready_fds == 0) {
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tcp->auxstr = "Timeout";
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return RVAL_STR;
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}
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fds = malloc(fdsize);
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if (!fds)
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die_out_of_memory();
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outptr = outstr;
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sep = "";
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for (i = 0; i < 3 && ready_fds > 0; i++) {
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int first = 1;
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arg = args[i+1];
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if (!arg || umoven(tcp, arg, fdsize, (char *) fds) < 0)
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continue;
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for (j = 0;; j++) {
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j = next_set_bit(fds, j, nfds);
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if (j < 0)
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break;
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/* +2 chars needed at the end: ']',NUL */
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if (outptr < end_outstr - (sizeof(", except [") + sizeof(int)*3 + 2)) {
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if (first) {
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outptr += sprintf(outptr, "%s%s [%u",
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sep,
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i == 0 ? "in" : i == 1 ? "out" : "except",
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j
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);
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first = 0;
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sep = ", ";
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}
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else {
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outptr += sprintf(outptr, " %u", j);
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}
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}
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if (--ready_fds == 0)
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break;
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}
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if (outptr != outstr)
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*outptr++ = ']';
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}
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free(fds);
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/* This contains no useful information on SunOS. */
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if (args[4]) {
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if (outptr < end_outstr - (10 + TIMEVAL_TEXT_BUFSIZE)) {
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outptr += sprintf(outptr, "%sleft ", sep);
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outptr = sprinttv(outptr, tcp, args[4], bitness, /*special:*/ 0);
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}
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}
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*outptr = '\0';
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tcp->auxstr = outstr;
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return RVAL_STR;
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#undef end_outstr
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}
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return 0;
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}
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int
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sys_oldselect(struct tcb *tcp)
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{
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long args[5];
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if (umoven(tcp, tcp->u_arg[0], sizeof args, (char *) args) < 0) {
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tprints("[...]");
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return 0;
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}
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return decode_select(tcp, args, BITNESS_CURRENT);
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}
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#ifdef ALPHA
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int
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sys_osf_select(struct tcb *tcp)
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{
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long *args = tcp->u_arg;
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return decode_select(tcp, args, BITNESS_32);
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}
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#endif
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#include "xlat/epollctls.h"
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#include "xlat/epollevents.h"
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#include "xlat/epollflags.h"
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/* Not aliased to printargs_ld: we want it to have a distinct address */
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int
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sys_epoll_create(struct tcb *tcp)
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{
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return printargs_ld(tcp);
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}
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int
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sys_epoll_create1(struct tcb *tcp)
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{
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if (entering(tcp))
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printflags(epollflags, tcp->u_arg[0], "EPOLL_???");
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return 0;
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}
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#ifdef HAVE_SYS_EPOLL_H
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static void
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print_epoll_event(struct epoll_event *ev)
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{
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tprints("{");
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printflags(epollevents, ev->events, "EPOLL???");
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/* We cannot know what format the program uses, so print u32 and u64
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which will cover every value. */
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tprintf(", {u32=%" PRIu32 ", u64=%" PRIu64 "}}",
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ev->data.u32, ev->data.u64);
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}
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#endif
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int
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sys_epoll_ctl(struct tcb *tcp)
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{
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if (entering(tcp)) {
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printfd(tcp, tcp->u_arg[0]);
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tprints(", ");
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printxval(epollctls, tcp->u_arg[1], "EPOLL_CTL_???");
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tprints(", ");
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printfd(tcp, tcp->u_arg[2]);
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tprints(", ");
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if (tcp->u_arg[3] == 0)
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tprints("NULL");
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else {
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#ifdef HAVE_SYS_EPOLL_H
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struct epoll_event ev;
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if (
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#ifdef EPOLL_CTL_DEL
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(tcp->u_arg[1] != EPOLL_CTL_DEL) &&
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#endif
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umove(tcp, tcp->u_arg[3], &ev) == 0)
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print_epoll_event(&ev);
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else
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|
#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;
|
|
}
|