1838 lines
42 KiB
C
1838 lines
42 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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* Copyright (c) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
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* Linux for s390 port by D.J. Barrow
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* <barrow_dj@mail.yahoo.com,djbarrow@de.ibm.com>
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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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* $Id$
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*/
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#include "defs.h"
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#include <signal.h>
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#include <time.h>
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#include <errno.h>
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#include <sys/user.h>
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#include <sys/syscall.h>
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#include <sys/param.h>
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#if HAVE_ASM_REG_H
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#include <asm/reg.h>
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#endif
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#ifdef HAVE_SYS_REG_H
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#include <sys/reg.h>
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#ifndef PTRACE_PEEKUSR
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# define PTRACE_PEEKUSR PTRACE_PEEKUSER
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#endif
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#elif defined(HAVE_LINUX_PTRACE_H)
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#undef PTRACE_SYSCALL
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#include <linux/ptrace.h>
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#endif
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#if defined(LINUX) && defined(IA64)
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# include <asm/ptrace_offsets.h>
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# include <asm/rse.h>
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#endif
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#ifndef SYS_ERRLIST_DECLARED
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extern int sys_nerr;
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extern char *sys_errlist[];
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#endif /* SYS_ERRLIST_DECLARED */
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#define NR_SYSCALL_BASE 0
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#ifdef LINUX
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#ifndef ERESTARTSYS
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#define ERESTARTSYS 512
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#endif
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#ifndef ERESTARTNOINTR
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#define ERESTARTNOINTR 513
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#endif
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#ifndef ERESTARTNOHAND
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#define ERESTARTNOHAND 514 /* restart if no handler.. */
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#endif
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#ifndef ENOIOCTLCMD
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#define ENOIOCTLCMD 515 /* No ioctl command */
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#endif
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#ifndef NSIG
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#define NSIG 32
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#endif
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#ifdef ARM
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#undef NSIG
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#define NSIG 32
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#undef NR_SYSCALL_BASE
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#define NR_SYSCALL_BASE __NR_SYSCALL_BASE
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#endif
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#endif /* LINUX */
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#include "syscall.h"
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/* Define these shorthand notations to simplify the syscallent files. */
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#define TF TRACE_FILE
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#define TI TRACE_IPC
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#define TN TRACE_NETWORK
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#define TP TRACE_PROCESS
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#define TS TRACE_SIGNAL
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struct sysent sysent0[] = {
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#include "syscallent.h"
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};
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int nsyscalls0 = sizeof sysent0 / sizeof sysent0[0];
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#if SUPPORTED_PERSONALITIES >= 2
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struct sysent sysent1[] = {
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#include "syscallent1.h"
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};
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int nsyscalls1 = sizeof sysent1 / sizeof sysent1[0];
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#endif /* SUPPORTED_PERSONALITIES >= 2 */
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#if SUPPORTED_PERSONALITIES >= 3
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struct sysent sysent2[] = {
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#include "syscallent2.h"
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};
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int nsyscalls2 = sizeof sysent2 / sizeof sysent2[0];
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#endif /* SUPPORTED_PERSONALITIES >= 3 */
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struct sysent *sysent;
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int nsyscalls;
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/* Now undef them since short defines cause wicked namespace pollution. */
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#undef TF
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#undef TI
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#undef TN
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#undef TP
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#undef TS
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char *errnoent0[] = {
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#include "errnoent.h"
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};
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int nerrnos0 = sizeof errnoent0 / sizeof errnoent0[0];
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#if SUPPORTED_PERSONALITIES >= 2
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char *errnoent1[] = {
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#include "errnoent1.h"
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};
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int nerrnos1 = sizeof errnoent1 / sizeof errnoent1[0];
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#endif /* SUPPORTED_PERSONALITIES >= 2 */
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#if SUPPORTED_PERSONALITIES >= 3
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char *errnoent2[] = {
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#include "errnoent2.h"
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};
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int nerrnos2 = sizeof errnoent2 / sizeof errnoent2[0];
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#endif /* SUPPORTED_PERSONALITIES >= 3 */
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char **errnoent;
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int nerrnos;
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int current_personality;
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int
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set_personality(personality)
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int personality;
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{
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switch (personality) {
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case 0:
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errnoent = errnoent0;
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nerrnos = nerrnos0;
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sysent = sysent0;
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nsyscalls = nsyscalls0;
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ioctlent = ioctlent0;
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nioctlents = nioctlents0;
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signalent = signalent0;
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nsignals = nsignals0;
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break;
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#if SUPPORTED_PERSONALITIES >= 2
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case 1:
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errnoent = errnoent1;
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nerrnos = nerrnos1;
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sysent = sysent1;
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nsyscalls = nsyscalls1;
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ioctlent = ioctlent1;
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nioctlents = nioctlents1;
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signalent = signalent1;
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nsignals = nsignals1;
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break;
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#endif /* SUPPORTED_PERSONALITIES >= 2 */
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#if SUPPORTED_PERSONALITIES >= 3
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case 2:
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errnoent = errnoent2;
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nerrnos = nerrnos2;
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sysent = sysent2;
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nsyscalls = nsyscalls2;
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ioctlent = ioctlent2;
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nioctlents = nioctlents2;
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signalent = signalent2;
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nsignals = nsignals2;
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break;
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#endif /* SUPPORTED_PERSONALITIES >= 3 */
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default:
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return -1;
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}
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current_personality = personality;
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return 0;
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}
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int qual_flags[MAX_QUALS];
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static int call_count[MAX_QUALS];
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static int error_count[MAX_QUALS];
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static struct timeval tv_count[MAX_QUALS];
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static int sorted_count[MAX_QUALS];
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static struct timeval shortest = { 1000000, 0 };
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static int lookup_syscall(), lookup_signal(), lookup_fault(), lookup_desc();
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static struct qual_options {
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int bitflag;
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char *option_name;
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int (*lookup)();
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char *argument_name;
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} qual_options[] = {
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{ QUAL_TRACE, "trace", lookup_syscall, "system call" },
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{ QUAL_TRACE, "t", lookup_syscall, "system call" },
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{ QUAL_ABBREV, "abbrev", lookup_syscall, "system call" },
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{ QUAL_ABBREV, "a", lookup_syscall, "system call" },
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{ QUAL_VERBOSE, "verbose", lookup_syscall, "system call" },
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{ QUAL_VERBOSE, "v", lookup_syscall, "system call" },
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{ QUAL_RAW, "raw", lookup_syscall, "system call" },
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{ QUAL_RAW, "x", lookup_syscall, "system call" },
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{ QUAL_SIGNAL, "signal", lookup_signal, "signal" },
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{ QUAL_SIGNAL, "signals", lookup_signal, "signal" },
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{ QUAL_SIGNAL, "s", lookup_signal, "signal" },
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{ QUAL_FAULT, "fault", lookup_fault, "fault" },
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{ QUAL_FAULT, "faults", lookup_fault, "fault" },
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{ QUAL_FAULT, "m", lookup_fault, "fault" },
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{ QUAL_READ, "read", lookup_desc, "descriptor" },
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{ QUAL_READ, "reads", lookup_desc, "descriptor" },
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{ QUAL_READ, "r", lookup_desc, "descriptor" },
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{ QUAL_WRITE, "write", lookup_desc, "descriptor" },
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{ QUAL_WRITE, "writes", lookup_desc, "descriptor" },
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{ QUAL_WRITE, "w", lookup_desc, "descriptor" },
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{ 0, NULL, NULL, NULL },
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};
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static int
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lookup_syscall(s)
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char *s;
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{
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int i;
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for (i = 0; i < nsyscalls; i++) {
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if (strcmp(s, sysent[i].sys_name) == 0)
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return i;
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}
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return -1;
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}
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static int
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lookup_signal(s)
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char *s;
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{
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int i;
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char buf[32];
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if (s && *s && isdigit((unsigned char)*s))
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return atoi(s);
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strcpy(buf, s);
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s = buf;
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for (i = 0; s[i]; i++)
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s[i] = toupper((unsigned char)(s[i]));
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if (strncmp(s, "SIG", 3) == 0)
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s += 3;
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for (i = 0; i <= NSIG; i++) {
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if (strcmp(s, signame(i) + 3) == 0)
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return i;
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}
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return -1;
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}
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static int
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lookup_fault(s)
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char *s;
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{
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return -1;
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}
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static int
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lookup_desc(s)
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char *s;
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{
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if (s && *s && isdigit((unsigned char)*s))
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return atoi(s);
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return -1;
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}
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static int
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lookup_class(s)
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char *s;
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{
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if (strcmp(s, "file") == 0)
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return TRACE_FILE;
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if (strcmp(s, "ipc") == 0)
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return TRACE_IPC;
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if (strcmp(s, "network") == 0)
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return TRACE_NETWORK;
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if (strcmp(s, "process") == 0)
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return TRACE_PROCESS;
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if (strcmp(s, "signal") == 0)
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return TRACE_SIGNAL;
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return -1;
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}
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void
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qualify(s)
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char *s;
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{
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struct qual_options *opt;
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int not;
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char *p;
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int i, n;
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opt = &qual_options[0];
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for (i = 0; (p = qual_options[i].option_name); i++) {
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n = strlen(p);
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if (strncmp(s, p, n) == 0 && s[n] == '=') {
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opt = &qual_options[i];
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s += n + 1;
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break;
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}
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}
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not = 0;
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if (*s == '!') {
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not = 1;
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s++;
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}
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if (strcmp(s, "none") == 0) {
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not = 1 - not;
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s = "all";
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}
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if (strcmp(s, "all") == 0) {
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for (i = 0; i < MAX_QUALS; i++) {
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if (not)
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qual_flags[i] &= ~opt->bitflag;
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else
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qual_flags[i] |= opt->bitflag;
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}
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return;
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}
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for (i = 0; i < MAX_QUALS; i++) {
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if (not)
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qual_flags[i] |= opt->bitflag;
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else
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qual_flags[i] &= ~opt->bitflag;
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}
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for (p = strtok(s, ","); p; p = strtok(NULL, ",")) {
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if (opt->bitflag == QUAL_TRACE && (n = lookup_class(p)) > 0) {
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for (i = 0; i < MAX_QUALS; i++) {
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if (sysent[i].sys_flags & n) {
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if (not)
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qual_flags[i] &= ~opt->bitflag;
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else
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qual_flags[i] |= opt->bitflag;
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}
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}
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continue;
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}
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if ((n = (*opt->lookup)(p)) < 0) {
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fprintf(stderr, "strace: invalid %s `%s'\n",
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opt->argument_name, p);
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exit(1);
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}
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if (not)
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qual_flags[n] &= ~opt->bitflag;
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else
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qual_flags[n] |= opt->bitflag;
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}
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return;
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}
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static void
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dumpio(tcp)
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struct tcb *tcp;
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{
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if (syserror(tcp))
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return;
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if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= MAX_QUALS)
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return;
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switch (tcp->scno + NR_SYSCALL_BASE) {
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case SYS_read:
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#ifdef SYS_recv
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case SYS_recv:
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#endif
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#ifdef SYS_recvfrom
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case SYS_recvfrom:
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#endif
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if (qual_flags[tcp->u_arg[0]] & QUAL_READ)
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dumpstr(tcp, tcp->u_arg[1], tcp->u_rval);
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break;
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case SYS_write:
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#ifdef SYS_send
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case SYS_send:
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#endif
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#ifdef SYS_sendto
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case SYS_sendto:
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#endif
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if (qual_flags[tcp->u_arg[0]] & QUAL_WRITE)
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dumpstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
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break;
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}
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}
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#ifndef FREEBSD
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enum subcall_style { shift_style, deref_style, mask_style, door_style };
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#else /* FREEBSD */
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enum subcall_style { shift_style, deref_style, mask_style, door_style, table_style };
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struct subcall {
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int call;
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int nsubcalls;
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int subcalls[5];
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};
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const struct subcall subcalls_table[] = {
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{ SYS_shmsys, 5, { SYS_shmat, SYS_shmctl, SYS_shmdt, SYS_shmget, SYS_shmctl } },
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#ifdef SYS_semconfig
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{ SYS_semsys, 4, { SYS___semctl, SYS_semget, SYS_semop, SYS_semconfig } },
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#else
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{ SYS_semsys, 3, { SYS___semctl, SYS_semget, SYS_semop } },
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#endif
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{ SYS_msgsys, 4, { SYS_msgctl, SYS_msgget, SYS_msgsnd, SYS_msgrcv } },
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};
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#endif /* FREEBSD */
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#if !(defined(LINUX) && ( defined(ALPHA) || defined(IA64) || defined(MIPS) ))
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const int socket_map [] = {
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/* SYS_SOCKET */ 97,
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/* SYS_BIND */ 104,
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/* SYS_CONNECT */ 98,
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/* SYS_LISTEN */ 106,
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/* SYS_ACCEPT */ 99,
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/* SYS_GETSOCKNAME */ 150,
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/* SYS_GETPEERNAME */ 141,
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/* SYS_SOCKETPAIR */ 135,
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/* SYS_SEND */ 101,
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/* SYS_RECV */ 102,
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/* SYS_SENDTO */ 133,
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/* SYS_RECVFROM */ 125,
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/* SYS_SHUTDOWN */ 134,
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/* SYS_SETSOCKOPT */ 105,
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/* SYS_GETSOCKOPT */ 118,
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/* SYS_SENDMSG */ 114,
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/* SYS_RECVMSG */ 113
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};
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|
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void
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sparc_socket_decode (tcp)
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struct tcb *tcp;
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{
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volatile long addr;
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volatile int i, n;
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if (tcp->u_arg [0] < 1 || tcp->u_arg [0] > sizeof(socket_map)/sizeof(int)+1){
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return;
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}
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tcp->scno = socket_map [tcp->u_arg [0]-1];
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n = tcp->u_nargs = sysent [tcp->scno].nargs;
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addr = tcp->u_arg [1];
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for (i = 0; i < n; i++){
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int arg;
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if (umoven (tcp, addr, sizeof (arg), (void *) &arg) < 0)
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arg = 0;
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tcp->u_arg [i] = arg;
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addr += sizeof (arg);
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}
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}
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|
|
static void
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decode_subcall(tcp, subcall, nsubcalls, style)
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struct tcb *tcp;
|
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int subcall;
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int nsubcalls;
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enum subcall_style style;
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{
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int i, addr, mask, arg;
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|
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switch (style) {
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case shift_style:
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if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= nsubcalls)
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return;
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tcp->scno = subcall + tcp->u_arg[0];
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if (sysent[tcp->scno].nargs != -1)
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tcp->u_nargs = sysent[tcp->scno].nargs;
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else
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tcp->u_nargs--;
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for (i = 0; i < tcp->u_nargs; i++)
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tcp->u_arg[i] = tcp->u_arg[i + 1];
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break;
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case deref_style:
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if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= nsubcalls)
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return;
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tcp->scno = subcall + tcp->u_arg[0];
|
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addr = tcp->u_arg[1];
|
|
for (i = 0; i < sysent[tcp->scno].nargs; i++) {
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|
if (umove(tcp, addr, &arg) < 0)
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arg = 0;
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tcp->u_arg[i] = arg;
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addr += sizeof(arg);
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}
|
|
tcp->u_nargs = sysent[tcp->scno].nargs;
|
|
break;
|
|
case mask_style:
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|
mask = (tcp->u_arg[0] >> 8) & 0xff;
|
|
for (i = 0; mask; i++)
|
|
mask >>= 1;
|
|
if (i >= nsubcalls)
|
|
return;
|
|
tcp->u_arg[0] &= 0xff;
|
|
tcp->scno = subcall + i;
|
|
if (sysent[tcp->scno].nargs != -1)
|
|
tcp->u_nargs = sysent[tcp->scno].nargs;
|
|
break;
|
|
case door_style:
|
|
/*
|
|
* Oh, yuck. The call code is the *sixth* argument.
|
|
* (don't you mean the *last* argument? - JH)
|
|
*/
|
|
if (tcp->u_arg[5] < 0 || tcp->u_arg[5] >= nsubcalls)
|
|
return;
|
|
tcp->scno = subcall + tcp->u_arg[5];
|
|
if (sysent[tcp->scno].nargs != -1)
|
|
tcp->u_nargs = sysent[tcp->scno].nargs;
|
|
else
|
|
tcp->u_nargs--;
|
|
break;
|
|
#ifdef FREEBSD
|
|
case table_style:
|
|
for (i = 0; i < sizeof(subcalls_table) / sizeof(struct subcall); i++)
|
|
if (subcalls_table[i].call == tcp->scno) break;
|
|
if (i < sizeof(subcalls_table) / sizeof(struct subcall) &&
|
|
tcp->u_arg[0] >= 0 && tcp->u_arg[0] < subcalls_table[i].nsubcalls) {
|
|
tcp->scno = subcalls_table[i].subcalls[tcp->u_arg[0]];
|
|
for (i = 0; i < tcp->u_nargs; i++)
|
|
tcp->u_arg[i] = tcp->u_arg[i + 1];
|
|
}
|
|
break;
|
|
#endif /* FREEBSD */
|
|
}
|
|
}
|
|
#endif
|
|
|
|
struct tcb *tcp_last = NULL;
|
|
|
|
static int
|
|
internal_syscall(tcp)
|
|
struct tcb *tcp;
|
|
{
|
|
/*
|
|
* We must always trace a few critical system calls in order to
|
|
* correctly support following forks in the presence of tracing
|
|
* qualifiers.
|
|
*/
|
|
switch (tcp->scno + NR_SYSCALL_BASE) {
|
|
#ifdef SYS_fork
|
|
case SYS_fork:
|
|
#endif
|
|
#ifdef SYS_vfork
|
|
case SYS_vfork:
|
|
#endif
|
|
internal_fork(tcp);
|
|
break;
|
|
#ifdef SYS_clone
|
|
case SYS_clone:
|
|
internal_clone(tcp);
|
|
break;
|
|
#endif
|
|
#ifdef SYS_execv
|
|
case SYS_execv:
|
|
#endif
|
|
#ifdef SYS_execve
|
|
case SYS_execve:
|
|
#endif
|
|
internal_exec(tcp);
|
|
break;
|
|
|
|
#ifdef SYS_wait
|
|
case SYS_wait:
|
|
#endif
|
|
#ifdef SYS_wait4
|
|
case SYS_wait4:
|
|
#endif
|
|
#ifdef SYS_waitpid
|
|
case SYS_waitpid:
|
|
#endif
|
|
#ifdef SYS_waitsys
|
|
case SYS_waitsys:
|
|
#endif
|
|
internal_wait(tcp);
|
|
break;
|
|
|
|
#ifdef SYS_exit
|
|
case SYS_exit:
|
|
#endif
|
|
internal_exit(tcp);
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
#ifdef LINUX
|
|
#if defined (I386)
|
|
static long eax;
|
|
#elif defined (IA64)
|
|
long r8, r10, psr;
|
|
long ia32 = 0;
|
|
#elif defined (POWERPC)
|
|
static long result,flags;
|
|
#elif defined (M68K)
|
|
static int d0;
|
|
#elif defined (ARM)
|
|
static int r0;
|
|
#elif defined (ALPHA)
|
|
static long r0;
|
|
static long a3;
|
|
#elif defined (SPARC)
|
|
static struct pt_regs regs;
|
|
static unsigned long trap;
|
|
#elif defined(MIPS)
|
|
static long a3;
|
|
static long r2;
|
|
#elif defined(S390)
|
|
static long gpr2;
|
|
static long pc;
|
|
#endif
|
|
#endif /* LINUX */
|
|
#ifdef FREEBSD
|
|
struct reg regs;
|
|
#endif /* FREEBSD */
|
|
|
|
int
|
|
get_scno(tcp)
|
|
struct tcb *tcp;
|
|
{
|
|
long scno = 0;
|
|
#ifndef USE_PROCFS
|
|
int pid = tcp->pid;
|
|
#endif /* !PROCFS */
|
|
|
|
#ifdef LINUX
|
|
#if defined(S390)
|
|
if (upeek(tcp->pid,PT_PSWADDR,&pc) < 0)
|
|
return -1;
|
|
scno = ptrace(PTRACE_PEEKTEXT, tcp->pid, (char *)(pc-4),0);
|
|
if (errno)
|
|
return -1;
|
|
scno&=0xFF;
|
|
#elif defined (POWERPC)
|
|
if (upeek(pid, 4*PT_R0, &scno) < 0)
|
|
return -1;
|
|
if (!(tcp->flags & TCB_INSYSCALL)) {
|
|
/* Check if we return from execve. */
|
|
if (scno == 0 && (tcp->flags & TCB_WAITEXECVE)) {
|
|
tcp->flags &= ~TCB_WAITEXECVE;
|
|
return 0;
|
|
}
|
|
}
|
|
#elif defined (I386)
|
|
if (upeek(pid, 4*ORIG_EAX, &scno) < 0)
|
|
return -1;
|
|
#elif defined(IA64)
|
|
#define IA64_PSR_IS ((long)1 << 34)
|
|
if (upeek (pid, PT_CR_IPSR, &psr) >= 0)
|
|
ia32 = (psr & IA64_PSR_IS);
|
|
if (!(tcp->flags & TCB_INSYSCALL)) {
|
|
if (ia32) {
|
|
if (upeek(pid, PT_R8, &scno) < 0)
|
|
return -1;
|
|
} else {
|
|
if (upeek (pid, PT_R15, &scno) < 0)
|
|
return -1;
|
|
}
|
|
} else {
|
|
/* syscall in progress */
|
|
if (upeek (pid, PT_R8, &r8) < 0)
|
|
return -1;
|
|
if (upeek (pid, PT_R10, &r10) < 0)
|
|
return -1;
|
|
}
|
|
#elif defined (ARM)
|
|
{
|
|
long pc;
|
|
upeek(pid, 4*15, &pc);
|
|
umoven(tcp, pc-4, 4, (char *)&scno);
|
|
scno &= 0x000fffff;
|
|
}
|
|
#elif defined (M68K)
|
|
if (upeek(pid, 4*PT_ORIG_D0, &scno) < 0)
|
|
return -1;
|
|
#elif defined (MIPS)
|
|
if (upeek(pid, REG_A3, &a3) < 0)
|
|
return -1;
|
|
|
|
if(!(tcp->flags & TCB_INSYSCALL)) {
|
|
if (upeek(pid, REG_V0, &scno) < 0)
|
|
return -1;
|
|
|
|
if (scno < 0 || scno > nsyscalls) {
|
|
if(a3 == 0 || a3 == -1) {
|
|
if(debug)
|
|
fprintf (stderr, "stray syscall exit: v0 = %ld\n", scno);
|
|
return 0;
|
|
}
|
|
}
|
|
} else {
|
|
if (upeek(pid, REG_V0, &r2) < 0)
|
|
return -1;
|
|
}
|
|
#elif defined (ALPHA)
|
|
if (upeek(pid, REG_A3, &a3) < 0)
|
|
return -1;
|
|
|
|
if (!(tcp->flags & TCB_INSYSCALL)) {
|
|
if (upeek(pid, REG_R0, &scno) < 0)
|
|
return -1;
|
|
|
|
/* Check if we return from execve. */
|
|
if (scno == 0 && tcp->flags & TCB_WAITEXECVE) {
|
|
tcp->flags &= ~TCB_WAITEXECVE;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Do some sanity checks to figure out if it's
|
|
* really a syscall entry
|
|
*/
|
|
if (scno < 0 || scno > nsyscalls) {
|
|
if (a3 == 0 || a3 == -1) {
|
|
if (debug)
|
|
fprintf (stderr, "stray syscall exit: r0 = %ld\n", scno);
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
if (upeek(pid, REG_R0, &r0) < 0)
|
|
return -1;
|
|
}
|
|
#elif defined (SPARC)
|
|
/* Everything we need is in the current register set. */
|
|
if (ptrace(PTRACE_GETREGS,pid,(char *)®s,0) < 0)
|
|
return -1;
|
|
|
|
/* If we are entering, then disassemble the syscall trap. */
|
|
if (!(tcp->flags & TCB_INSYSCALL)) {
|
|
/* Retrieve the syscall trap instruction. */
|
|
errno = 0;
|
|
trap = ptrace(PTRACE_PEEKTEXT,pid,(char *)regs.r_pc,0);
|
|
if (errno)
|
|
return -1;
|
|
|
|
/* Disassemble the trap to see what personality to use. */
|
|
switch (trap) {
|
|
case 0x91d02010:
|
|
/* Linux/SPARC syscall trap. */
|
|
set_personality(0);
|
|
break;
|
|
case 0x91d0206d:
|
|
/* Linux/SPARC64 syscall trap. */
|
|
fprintf(stderr,"syscall: Linux/SPARC64 not supported yet\n");
|
|
return -1;
|
|
case 0x91d02000:
|
|
/* SunOS syscall trap. (pers 1) */
|
|
fprintf(stderr,"syscall: SunOS no support\n");
|
|
return -1;
|
|
case 0x91d02008:
|
|
/* Solaris 2.x syscall trap. (per 2) */
|
|
set_personality(1);
|
|
break;
|
|
case 0x91d02009:
|
|
/* NetBSD/FreeBSD syscall trap. */
|
|
fprintf(stderr,"syscall: NetBSD/FreeBSD not supported\n");
|
|
return -1;
|
|
case 0x91d02027:
|
|
/* Solaris 2.x gettimeofday */
|
|
set_personality(1);
|
|
break;
|
|
default:
|
|
/* Unknown syscall trap. */
|
|
if(tcp->flags & TCB_WAITEXECVE) {
|
|
tcp->flags &= ~TCB_WAITEXECVE;
|
|
return 0;
|
|
}
|
|
fprintf(stderr,"syscall: unknown syscall trap %08x %08x\n", trap, regs.r_pc);
|
|
return -1;
|
|
}
|
|
|
|
/* Extract the system call number from the registers. */
|
|
if (trap == 0x91d02027)
|
|
scno = 156;
|
|
else
|
|
scno = regs.r_g1;
|
|
if (scno == 0) {
|
|
scno = regs.r_o0;
|
|
memmove (®s.r_o0, ®s.r_o1, 7*sizeof(regs.r_o0));
|
|
}
|
|
}
|
|
#endif
|
|
#endif /* LINUX */
|
|
#ifdef SUNOS4
|
|
if (upeek(pid, uoff(u_arg[7]), &scno) < 0)
|
|
return -1;
|
|
#endif
|
|
#ifdef USE_PROCFS
|
|
#ifdef HAVE_PR_SYSCALL
|
|
scno = tcp->status.PR_SYSCALL;
|
|
#else /* !HAVE_PR_SYSCALL */
|
|
#ifndef FREEBSD
|
|
scno = tcp->status.PR_WHAT;
|
|
#else /* FREEBSD */
|
|
if (pread(tcp->pfd_reg, ®s, sizeof(regs), 0) < 0) {
|
|
perror("pread");
|
|
return -1;
|
|
}
|
|
switch (regs.r_eax) {
|
|
case SYS_syscall:
|
|
case SYS___syscall:
|
|
pread(tcp->pfd, &scno, sizeof(scno), regs.r_esp + sizeof(int));
|
|
break;
|
|
default:
|
|
scno = regs.r_eax;
|
|
break;
|
|
}
|
|
#endif /* FREEBSD */
|
|
#endif /* !HAVE_PR_SYSCALL */
|
|
#endif /* USE_PROCFS */
|
|
if (!(tcp->flags & TCB_INSYSCALL))
|
|
tcp->scno = scno;
|
|
return 1;
|
|
}
|
|
|
|
|
|
int
|
|
syscall_fixup(tcp)
|
|
struct tcb *tcp;
|
|
{
|
|
#ifndef USE_PROCFS
|
|
int pid = tcp->pid;
|
|
#else /* USE_PROCFS */
|
|
int scno = tcp->scno;
|
|
|
|
if (!(tcp->flags & TCB_INSYSCALL)) {
|
|
if (tcp->status.PR_WHY != PR_SYSENTRY) {
|
|
if (
|
|
scno == SYS_fork
|
|
#ifdef SYS_vfork
|
|
|| scno == SYS_vfork
|
|
#endif /* SYS_vfork */
|
|
) {
|
|
/* We are returning in the child, fake it. */
|
|
tcp->status.PR_WHY = PR_SYSENTRY;
|
|
trace_syscall(tcp);
|
|
tcp->status.PR_WHY = PR_SYSEXIT;
|
|
}
|
|
else {
|
|
fprintf(stderr, "syscall: missing entry\n");
|
|
tcp->flags |= TCB_INSYSCALL;
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
if (tcp->status.PR_WHY != PR_SYSEXIT) {
|
|
fprintf(stderr, "syscall: missing exit\n");
|
|
tcp->flags &= ~TCB_INSYSCALL;
|
|
}
|
|
}
|
|
#endif /* USE_PROCFS */
|
|
#ifdef SUNOS4
|
|
if (!(tcp->flags & TCB_INSYSCALL)) {
|
|
if (scno == 0) {
|
|
fprintf(stderr, "syscall: missing entry\n");
|
|
tcp->flags |= TCB_INSYSCALL;
|
|
}
|
|
}
|
|
else {
|
|
if (scno != 0) {
|
|
if (debug) {
|
|
/*
|
|
* This happens when a signal handler
|
|
* for a signal which interrupted a
|
|
* a system call makes another system call.
|
|
*/
|
|
fprintf(stderr, "syscall: missing exit\n");
|
|
}
|
|
tcp->flags &= ~TCB_INSYSCALL;
|
|
}
|
|
}
|
|
#endif /* SUNOS4 */
|
|
#ifdef LINUX
|
|
#if defined (I386)
|
|
if (upeek(pid, 4*EAX, &eax) < 0)
|
|
return -1;
|
|
if (eax != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
|
|
if (debug)
|
|
fprintf(stderr, "stray syscall exit: eax = %ld\n", eax);
|
|
return 0;
|
|
}
|
|
#elif defined (S390)
|
|
if (upeek(pid, PT_GPR2, &gpr2) < 0)
|
|
return -1;
|
|
if (gpr2 != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
|
|
if (debug)
|
|
fprintf(stderr, "stray syscall exit: gpr2 = %ld\n", gpr2);
|
|
return 0;
|
|
}
|
|
#elif defined (POWERPC)
|
|
# define SO_MASK 0x10000000
|
|
if (upeek(pid, 4*PT_CCR, &flags) < 0)
|
|
return -1;
|
|
if (upeek(pid, 4*PT_R3, &result) < 0)
|
|
return -1;
|
|
if (flags & SO_MASK)
|
|
result = -result;
|
|
#elif defined (M68K)
|
|
if (upeek(pid, 4*PT_D0, &d0) < 0)
|
|
return -1;
|
|
if (d0 != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
|
|
if (debug)
|
|
fprintf(stderr, "stray syscall exit: d0 = %ld\n", d0);
|
|
return 0;
|
|
}
|
|
#elif defined (ARM)
|
|
if (upeek(pid, 4*0, (long *)&r0) < 0)
|
|
return -1;
|
|
if ( 0 && r0 != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
|
|
if (debug)
|
|
fprintf(stderr, "stray syscall exit: d0 = %ld\n", r0);
|
|
return 0;
|
|
}
|
|
#else
|
|
#endif
|
|
#endif /* LINUX */
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
get_error(tcp)
|
|
struct tcb *tcp;
|
|
{
|
|
int u_error = 0;
|
|
#ifdef LINUX
|
|
#ifdef S390
|
|
if (gpr2 && (unsigned) -gpr2 < nerrnos) {
|
|
tcp->u_rval = -1;
|
|
u_error = -gpr2;
|
|
}
|
|
else {
|
|
tcp->u_rval = gpr2;
|
|
u_error = 0;
|
|
}
|
|
#else /* !S390 */
|
|
#ifdef I386
|
|
if (eax < 0 && -eax < nerrnos) {
|
|
tcp->u_rval = -1;
|
|
u_error = -eax;
|
|
}
|
|
else {
|
|
tcp->u_rval = eax;
|
|
u_error = 0;
|
|
}
|
|
#else /* !I386 */
|
|
#ifdef IA64
|
|
if (ia32) {
|
|
int err;
|
|
|
|
err = (int)r8;
|
|
if (err < 0 && -err < nerrnos) {
|
|
tcp->u_rval = -1;
|
|
u_error = -err;
|
|
}
|
|
else {
|
|
tcp->u_rval = err;
|
|
u_error = 0;
|
|
}
|
|
} else {
|
|
if (r10) {
|
|
tcp->u_rval = -1;
|
|
u_error = r8;
|
|
} else {
|
|
tcp->u_rval = r8;
|
|
u_error = 0;
|
|
}
|
|
}
|
|
#else /* !IA64 */
|
|
#ifdef MIPS
|
|
if (a3) {
|
|
tcp->u_rval = -1;
|
|
u_error = r2;
|
|
} else {
|
|
tcp->u_rval = r2;
|
|
u_error = 0;
|
|
}
|
|
#else
|
|
#ifdef POWERPC
|
|
if (result && (unsigned) -result < nerrnos) {
|
|
tcp->u_rval = -1;
|
|
u_error = -result;
|
|
}
|
|
else {
|
|
tcp->u_rval = result;
|
|
u_error = 0;
|
|
}
|
|
#else /* !POWERPC */
|
|
#ifdef M68K
|
|
if (d0 && (unsigned) -d0 < nerrnos) {
|
|
tcp->u_rval = -1;
|
|
u_error = -d0;
|
|
}
|
|
else {
|
|
tcp->u_rval = d0;
|
|
u_error = 0;
|
|
}
|
|
#else /* !M68K */
|
|
#ifdef ARM
|
|
if (r0 && (unsigned) -r0 < nerrnos) {
|
|
tcp->u_rval = -1;
|
|
u_error = -r0;
|
|
}
|
|
else {
|
|
tcp->u_rval = r0;
|
|
u_error = 0;
|
|
}
|
|
#else /* !ARM */
|
|
#ifdef ALPHA
|
|
if (a3) {
|
|
tcp->u_rval = -1;
|
|
u_error = r0;
|
|
}
|
|
else {
|
|
tcp->u_rval = r0;
|
|
u_error = 0;
|
|
}
|
|
#else /* !ALPHA */
|
|
#ifdef SPARC
|
|
if (regs.r_psr & PSR_C) {
|
|
tcp->u_rval = -1;
|
|
u_error = regs.r_o0;
|
|
}
|
|
else {
|
|
tcp->u_rval = regs.r_o0;
|
|
u_error = 0;
|
|
}
|
|
#endif /* SPARC */
|
|
#endif /* ALPHA */
|
|
#endif /* ARM */
|
|
#endif /* M68K */
|
|
#endif /* POWERPC */
|
|
#endif /* MIPS */
|
|
#endif /* IA64 */
|
|
#endif /* I386 */
|
|
#endif /* S390 */
|
|
#endif /* LINUX */
|
|
#ifdef SUNOS4
|
|
/* get error code from user struct */
|
|
if (upeek(pid, uoff(u_error), &u_error) < 0)
|
|
return -1;
|
|
u_error >>= 24; /* u_error is a char */
|
|
|
|
/* get system call return value */
|
|
if (upeek(pid, uoff(u_rval1), &tcp->u_rval) < 0)
|
|
return -1;
|
|
#endif /* SUNOS4 */
|
|
#ifdef SVR4
|
|
#ifdef SPARC
|
|
/* Judicious guessing goes a long way. */
|
|
if (tcp->status.pr_reg[R_PSR] & 0x100000) {
|
|
tcp->u_rval = -1;
|
|
u_error = tcp->status.pr_reg[R_O0];
|
|
}
|
|
else {
|
|
tcp->u_rval = tcp->status.pr_reg[R_O0];
|
|
u_error = 0;
|
|
}
|
|
#endif /* SPARC */
|
|
#ifdef I386
|
|
/* Wanna know how to kill an hour single-stepping? */
|
|
if (tcp->status.PR_REG[EFL] & 0x1) {
|
|
tcp->u_rval = -1;
|
|
u_error = tcp->status.PR_REG[EAX];
|
|
}
|
|
else {
|
|
tcp->u_rval = tcp->status.PR_REG[EAX];
|
|
#ifdef HAVE_LONG_LONG
|
|
tcp->u_lrval =
|
|
((unsigned long long) tcp->status.PR_REG[EDX] << 32) +
|
|
tcp->status.PR_REG[EAX];
|
|
#endif
|
|
u_error = 0;
|
|
}
|
|
#endif /* I386 */
|
|
#ifdef MIPS
|
|
if (tcp->status.pr_reg[CTX_A3]) {
|
|
tcp->u_rval = -1;
|
|
u_error = tcp->status.pr_reg[CTX_V0];
|
|
}
|
|
else {
|
|
tcp->u_rval = tcp->status.pr_reg[CTX_V0];
|
|
u_error = 0;
|
|
}
|
|
#endif /* MIPS */
|
|
#endif /* SVR4 */
|
|
#ifdef FREEBSD
|
|
if (regs.r_eflags & PSL_C) {
|
|
tcp->u_rval = -1;
|
|
u_error = regs.r_eax;
|
|
} else {
|
|
tcp->u_rval = regs.r_eax;
|
|
tcp->u_lrval =
|
|
((unsigned long long) regs.r_edx << 32) + regs.r_eax;
|
|
u_error = 0;
|
|
}
|
|
#endif /* FREEBSD */
|
|
tcp->u_error = u_error;
|
|
return 1;
|
|
}
|
|
|
|
int syscall_enter(tcp)
|
|
struct tcb *tcp;
|
|
{
|
|
#ifndef USE_PROCFS
|
|
int pid = tcp->pid;
|
|
#endif /* !USE_PROCFS */
|
|
#ifdef LINUX
|
|
#if defined(S390)
|
|
{
|
|
int i;
|
|
if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
|
|
tcp->u_nargs = sysent[tcp->scno].nargs;
|
|
else
|
|
tcp->u_nargs = MAX_ARGS;
|
|
for (i = 0; i < tcp->u_nargs; i++) {
|
|
if (upeek(pid,i==0 ? PT_ORIGGPR2:PT_GPR2+(i<<2), &tcp->u_arg[i]) < 0)
|
|
return -1;
|
|
}
|
|
}
|
|
#elif defined (ALPHA)
|
|
{
|
|
int i;
|
|
if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
|
|
tcp->u_nargs = sysent[tcp->scno].nargs;
|
|
else
|
|
tcp->u_nargs = MAX_ARGS;
|
|
for (i = 0; i < tcp->u_nargs; i++) {
|
|
/* WTA: if scno is out-of-bounds this will bomb. Add range-check
|
|
* for scno somewhere above here!
|
|
*/
|
|
if (upeek(pid, REG_A0+i, &tcp->u_arg[i]) < 0)
|
|
return -1;
|
|
}
|
|
}
|
|
#elif defined (IA64)
|
|
{
|
|
unsigned long *bsp, cfm, i;
|
|
|
|
if (upeek(pid, PT_AR_BSP, (long *) &bsp) < 0)
|
|
return -1;
|
|
if (upeek(pid, PT_CFM, (long *) &cfm) < 0)
|
|
return -1;
|
|
|
|
bsp = ia64_rse_skip_regs(bsp, -(cfm & 0x7f));
|
|
|
|
if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
|
|
tcp->u_nargs = sysent[tcp->scno].nargs;
|
|
else
|
|
tcp->u_nargs = MAX_ARGS;
|
|
for (i = 0; i < tcp->u_nargs; ++i) {
|
|
if (umoven(tcp, (unsigned long) ia64_rse_skip_regs(bsp, i), sizeof(long),
|
|
(char *) &tcp->u_arg[i])
|
|
< 0)
|
|
return -1;
|
|
}
|
|
}
|
|
#elif defined (MIPS)
|
|
{
|
|
long sp;
|
|
int i, nargs;
|
|
|
|
if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
|
|
nargs = tcp->u_nargs = sysent[tcp->scno].nargs;
|
|
else
|
|
nargs = tcp->u_nargs = MAX_ARGS;
|
|
if(nargs > 4) {
|
|
if(upeek(pid, REG_SP, &sp) < 0)
|
|
return -1;
|
|
for(i = 0; i < 4; i++) {
|
|
if (upeek(pid, REG_A0 + i, &tcp->u_arg[i])<0)
|
|
return -1;
|
|
}
|
|
umoven(tcp, sp+16, (nargs-4) * sizeof(tcp->u_arg[0]),
|
|
(char *)(tcp->u_arg + 4));
|
|
} else {
|
|
for(i = 0; i < nargs; i++) {
|
|
if (upeek(pid, REG_A0 + i, &tcp->u_arg[i]) < 0)
|
|
return -1;
|
|
}
|
|
}
|
|
}
|
|
#elif defined (POWERPC)
|
|
{
|
|
int i;
|
|
if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
|
|
tcp->u_nargs = sysent[tcp->scno].nargs;
|
|
else
|
|
tcp->u_nargs = MAX_ARGS;
|
|
for (i = 0; i < tcp->u_nargs; i++) {
|
|
if (upeek(pid, (i==0) ? (4*PT_ORIG_R3) : ((i+PT_R3)*4), &tcp->u_arg[i]) < 0)
|
|
return -1;
|
|
}
|
|
}
|
|
#elif defined (SPARC)
|
|
{
|
|
int i;
|
|
|
|
if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
|
|
tcp->u_nargs = sysent[tcp->scno].nargs;
|
|
else
|
|
tcp->u_nargs = MAX_ARGS;
|
|
for (i = 0; i < tcp->u_nargs; i++)
|
|
tcp->u_arg[i] = *((®s.r_o0) + i);
|
|
}
|
|
#else /* Other architecture (like i386) (32bits specific) */
|
|
{
|
|
int i;
|
|
if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
|
|
tcp->u_nargs = sysent[tcp->scno].nargs;
|
|
else
|
|
tcp->u_nargs = MAX_ARGS;
|
|
for (i = 0; i < tcp->u_nargs; i++) {
|
|
if (upeek(pid, i*4, &tcp->u_arg[i]) < 0)
|
|
return -1;
|
|
}
|
|
}
|
|
#endif
|
|
#endif /* LINUX */
|
|
#ifdef SUNOS4
|
|
{
|
|
int i;
|
|
if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
|
|
tcp->u_nargs = sysent[tcp->scno].nargs;
|
|
else
|
|
tcp->u_nargs = MAX_ARGS;
|
|
for (i = 0; i < tcp->u_nargs; i++) {
|
|
struct user *u;
|
|
|
|
if (upeek(pid, uoff(u_arg[0]) +
|
|
(i*sizeof(u->u_arg[0])), &tcp->u_arg[i]) < 0)
|
|
return -1;
|
|
}
|
|
}
|
|
#endif /* SUNOS4 */
|
|
#ifdef SVR4
|
|
#ifdef MIPS
|
|
/*
|
|
* SGI is broken: even though it has pr_sysarg, it doesn't
|
|
* set them on system call entry. Get a clue.
|
|
*/
|
|
if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
|
|
tcp->u_nargs = sysent[tcp->scno].nargs;
|
|
else
|
|
tcp->u_nargs = tcp->status.pr_nsysarg;
|
|
if (tcp->u_nargs > 4) {
|
|
memcpy(tcp->u_arg, &tcp->status.pr_reg[CTX_A0],
|
|
4*sizeof(tcp->u_arg[0]));
|
|
umoven(tcp, tcp->status.pr_reg[CTX_SP] + 16,
|
|
(tcp->u_nargs - 4)*sizeof(tcp->u_arg[0]), (char *) (tcp->u_arg + 4));
|
|
}
|
|
else {
|
|
memcpy(tcp->u_arg, &tcp->status.pr_reg[CTX_A0],
|
|
tcp->u_nargs*sizeof(tcp->u_arg[0]));
|
|
}
|
|
#elif UNIXWARE >= 2
|
|
/*
|
|
* Like SGI, UnixWare doesn't set pr_sysarg until system call exit
|
|
*/
|
|
if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
|
|
tcp->u_nargs = sysent[tcp->scno].nargs;
|
|
else
|
|
tcp->u_nargs = tcp->status.pr_lwp.pr_nsysarg;
|
|
umoven(tcp, tcp->status.PR_REG[UESP] + 4,
|
|
tcp->u_nargs*sizeof(tcp->u_arg[0]), (char *) tcp->u_arg);
|
|
#elif defined (HAVE_PR_SYSCALL)
|
|
if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
|
|
tcp->u_nargs = sysent[tcp->scno].nargs;
|
|
else
|
|
tcp->u_nargs = tcp->status.pr_nsysarg;
|
|
{
|
|
int i;
|
|
for (i = 0; i < tcp->u_nargs; i++)
|
|
tcp->u_arg[i] = tcp->status.pr_sysarg[i];
|
|
}
|
|
#elif defined (I386)
|
|
if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1)
|
|
tcp->u_nargs = sysent[tcp->scno].nargs;
|
|
else
|
|
tcp->u_nargs = 5;
|
|
umoven(tcp, tcp->status.PR_REG[UESP] + 4,
|
|
tcp->u_nargs*sizeof(tcp->u_arg[0]), (char *) tcp->u_arg);
|
|
#else
|
|
I DONT KNOW WHAT TO DO
|
|
#endif /* !HAVE_PR_SYSCALL */
|
|
#endif /* SVR4 */
|
|
#ifdef FREEBSD
|
|
if (tcp->scno >= 0 && tcp->scno < nsyscalls &&
|
|
sysent[tcp->scno].nargs > tcp->status.val)
|
|
tcp->u_nargs = sysent[tcp->scno].nargs;
|
|
else
|
|
tcp->u_nargs = tcp->status.val;
|
|
if (tcp->u_nargs < 0)
|
|
tcp->u_nargs = 0;
|
|
if (tcp->u_nargs > MAX_ARGS)
|
|
tcp->u_nargs = MAX_ARGS;
|
|
switch(regs.r_eax) {
|
|
case SYS___syscall:
|
|
pread(tcp->pfd, &tcp->u_arg, tcp->u_nargs * sizeof(unsigned long),
|
|
regs.r_esp + sizeof(int) + sizeof(quad_t));
|
|
break;
|
|
case SYS_syscall:
|
|
pread(tcp->pfd, &tcp->u_arg, tcp->u_nargs * sizeof(unsigned long),
|
|
regs.r_esp + 2 * sizeof(int));
|
|
break;
|
|
default:
|
|
pread(tcp->pfd, &tcp->u_arg, tcp->u_nargs * sizeof(unsigned long),
|
|
regs.r_esp + sizeof(int));
|
|
break;
|
|
}
|
|
#endif /* FREEBSD */
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
trace_syscall(tcp)
|
|
struct tcb *tcp;
|
|
{
|
|
int sys_res;
|
|
struct timeval tv;
|
|
int res;
|
|
|
|
/* Measure the exit time as early as possible to avoid errors. */
|
|
if (dtime && (tcp->flags & TCB_INSYSCALL))
|
|
gettimeofday(&tv, NULL);
|
|
|
|
res = get_scno(tcp);
|
|
if (res != 1)
|
|
return res;
|
|
|
|
res = syscall_fixup(tcp);
|
|
if (res != 1)
|
|
return res;
|
|
|
|
if (tcp->flags & TCB_INSYSCALL) {
|
|
long u_error;
|
|
res = get_error(tcp);
|
|
if (res != 1)
|
|
return res;
|
|
u_error = tcp->u_error;
|
|
|
|
|
|
internal_syscall(tcp);
|
|
if (tcp->scno >= 0 && tcp->scno < nsyscalls &&
|
|
!(qual_flags[tcp->scno] & QUAL_TRACE)) {
|
|
tcp->flags &= ~TCB_INSYSCALL;
|
|
return 0;
|
|
}
|
|
|
|
if (tcp->flags & TCB_REPRINT) {
|
|
printleader(tcp);
|
|
tprintf("<... ");
|
|
if (tcp->scno >= nsyscalls || tcp->scno < 0)
|
|
tprintf("syscall_%lu", tcp->scno);
|
|
else
|
|
tprintf("%s", sysent[tcp->scno].sys_name);
|
|
tprintf(" resumed> ");
|
|
}
|
|
|
|
if (cflag && tcp->scno < nsyscalls && tcp->scno >= 0) {
|
|
call_count[tcp->scno]++;
|
|
if (tcp->u_error)
|
|
error_count[tcp->scno]++;
|
|
tv_sub(&tv, &tv, &tcp->etime);
|
|
#ifdef LINUX
|
|
if (tv_cmp(&tv, &tcp->dtime) > 0) {
|
|
static struct timeval one_tick =
|
|
{ 0, 1000000 / HZ };
|
|
|
|
if (tv_nz(&tcp->dtime))
|
|
tv = tcp->dtime;
|
|
else if (tv_cmp(&tv, &one_tick) > 0) {
|
|
if (tv_cmp(&shortest, &one_tick) < 0)
|
|
tv = shortest;
|
|
else
|
|
tv = one_tick;
|
|
}
|
|
}
|
|
#endif /* LINUX */
|
|
if (tv_cmp(&tv, &shortest) < 0)
|
|
shortest = tv;
|
|
tv_add(&tv_count[tcp->scno],
|
|
&tv_count[tcp->scno], &tv);
|
|
tcp->flags &= ~TCB_INSYSCALL;
|
|
return 0;
|
|
}
|
|
|
|
if (tcp->scno >= nsyscalls || tcp->scno < 0
|
|
|| (qual_flags[tcp->scno] & QUAL_RAW))
|
|
sys_res = printargs(tcp);
|
|
else
|
|
sys_res = (*sysent[tcp->scno].sys_func)(tcp);
|
|
u_error = tcp->u_error;
|
|
tprintf(") ");
|
|
tabto(acolumn);
|
|
if (tcp->scno >= nsyscalls || tcp->scno < 0 ||
|
|
qual_flags[tcp->scno] & QUAL_RAW) {
|
|
if (u_error)
|
|
tprintf("= -1 (errno %ld)", u_error);
|
|
else
|
|
tprintf("= %#lx", tcp->u_rval);
|
|
}
|
|
else if (!(sys_res & RVAL_NONE) && u_error) {
|
|
switch (u_error) {
|
|
#ifdef LINUX
|
|
case ERESTARTSYS:
|
|
tprintf("= ? ERESTARTSYS (To be restarted)");
|
|
break;
|
|
case ERESTARTNOINTR:
|
|
tprintf("= ? ERESTARTNOINTR (To be restarted)");
|
|
break;
|
|
case ERESTARTNOHAND:
|
|
tprintf("= ? ERESTARTNOHAND (To be restarted)");
|
|
break;
|
|
#endif /* LINUX */
|
|
default:
|
|
tprintf("= -1 ");
|
|
if (u_error < nerrnos && u_error < sys_nerr)
|
|
tprintf("%s (%s)", errnoent[u_error],
|
|
sys_errlist[u_error]);
|
|
else if (u_error < nerrnos)
|
|
tprintf("%s (errno %ld)",
|
|
errnoent[u_error], u_error);
|
|
else if (u_error < sys_nerr)
|
|
tprintf("ERRNO_%ld (%s)", u_error,
|
|
sys_errlist[u_error]);
|
|
else
|
|
tprintf("E??? (errno %ld)", u_error);
|
|
break;
|
|
}
|
|
}
|
|
else {
|
|
if (sys_res & RVAL_NONE)
|
|
tprintf("= ?");
|
|
else {
|
|
switch (sys_res & RVAL_MASK) {
|
|
case RVAL_HEX:
|
|
tprintf("= %#lx", tcp->u_rval);
|
|
break;
|
|
case RVAL_OCTAL:
|
|
tprintf("= %#lo", tcp->u_rval);
|
|
break;
|
|
case RVAL_UDECIMAL:
|
|
tprintf("= %lu", tcp->u_rval);
|
|
break;
|
|
case RVAL_DECIMAL:
|
|
tprintf("= %ld", tcp->u_rval);
|
|
break;
|
|
#ifdef HAVE_LONG_LONG
|
|
case RVAL_LHEX:
|
|
tprintf("= %#llx", tcp->u_lrval);
|
|
break;
|
|
case RVAL_LOCTAL:
|
|
tprintf("= %#llo", tcp->u_lrval);
|
|
break;
|
|
case RVAL_LUDECIMAL:
|
|
tprintf("= %llu", tcp->u_lrval);
|
|
break;
|
|
case RVAL_LDECIMAL:
|
|
tprintf("= %lld", tcp->u_lrval);
|
|
break;
|
|
#endif
|
|
default:
|
|
fprintf(stderr,
|
|
"invalid rval format\n");
|
|
break;
|
|
}
|
|
}
|
|
if ((sys_res & RVAL_STR) && tcp->auxstr)
|
|
tprintf(" (%s)", tcp->auxstr);
|
|
}
|
|
if (dtime) {
|
|
tv_sub(&tv, &tv, &tcp->etime);
|
|
tprintf(" <%ld.%06ld>",
|
|
(long) tv.tv_sec, (long) tv.tv_usec);
|
|
}
|
|
printtrailer(tcp);
|
|
|
|
dumpio(tcp);
|
|
if (fflush(tcp->outf) == EOF)
|
|
return -1;
|
|
tcp->flags &= ~TCB_INSYSCALL;
|
|
return 0;
|
|
}
|
|
|
|
/* Entering system call */
|
|
res = syscall_enter(tcp);
|
|
if (res != 1)
|
|
return res;
|
|
|
|
switch (tcp->scno + NR_SYSCALL_BASE) {
|
|
#ifdef LINUX
|
|
#if !defined (ALPHA) && !defined(IA64) && !defined(SPARC) && !defined(MIPS)
|
|
case SYS_socketcall:
|
|
decode_subcall(tcp, SYS_socket_subcall,
|
|
SYS_socket_nsubcalls, deref_style);
|
|
break;
|
|
case SYS_ipc:
|
|
decode_subcall(tcp, SYS_ipc_subcall,
|
|
SYS_ipc_nsubcalls, shift_style);
|
|
break;
|
|
#endif /* !ALPHA && !IA64 && !MIPS && !SPARC */
|
|
#ifdef SPARC
|
|
case SYS_socketcall:
|
|
sparc_socket_decode (tcp);
|
|
break;
|
|
#endif
|
|
#endif /* LINUX */
|
|
#ifdef SVR4
|
|
#ifdef SYS_pgrpsys_subcall
|
|
case SYS_pgrpsys:
|
|
decode_subcall(tcp, SYS_pgrpsys_subcall,
|
|
SYS_pgrpsys_nsubcalls, shift_style);
|
|
break;
|
|
#endif /* SYS_pgrpsys_subcall */
|
|
#ifdef SYS_sigcall_subcall
|
|
case SYS_sigcall:
|
|
decode_subcall(tcp, SYS_sigcall_subcall,
|
|
SYS_sigcall_nsubcalls, mask_style);
|
|
break;
|
|
#endif /* SYS_sigcall_subcall */
|
|
case SYS_msgsys:
|
|
decode_subcall(tcp, SYS_msgsys_subcall,
|
|
SYS_msgsys_nsubcalls, shift_style);
|
|
break;
|
|
case SYS_shmsys:
|
|
decode_subcall(tcp, SYS_shmsys_subcall,
|
|
SYS_shmsys_nsubcalls, shift_style);
|
|
break;
|
|
case SYS_semsys:
|
|
decode_subcall(tcp, SYS_semsys_subcall,
|
|
SYS_semsys_nsubcalls, shift_style);
|
|
break;
|
|
#if 0 /* broken */
|
|
case SYS_utssys:
|
|
decode_subcall(tcp, SYS_utssys_subcall,
|
|
SYS_utssys_nsubcalls, shift_style);
|
|
break;
|
|
#endif
|
|
case SYS_sysfs:
|
|
decode_subcall(tcp, SYS_sysfs_subcall,
|
|
SYS_sysfs_nsubcalls, shift_style);
|
|
break;
|
|
case SYS_spcall:
|
|
decode_subcall(tcp, SYS_spcall_subcall,
|
|
SYS_spcall_nsubcalls, shift_style);
|
|
break;
|
|
#ifdef SYS_context_subcall
|
|
case SYS_context:
|
|
decode_subcall(tcp, SYS_context_subcall,
|
|
SYS_context_nsubcalls, shift_style);
|
|
break;
|
|
#endif /* SYS_context_subcall */
|
|
#ifdef SYS_door_subcall
|
|
case SYS_door:
|
|
decode_subcall(tcp, SYS_door_subcall,
|
|
SYS_door_nsubcalls, door_style);
|
|
break;
|
|
#endif /* SYS_door_subcall */
|
|
#ifdef SYS_kaio_subcall
|
|
case SYS_kaio:
|
|
decode_subcall(tcp, SYS_kaio_subcall,
|
|
SYS_kaio_nsubcalls, shift_style);
|
|
break;
|
|
#endif
|
|
#endif /* SVR4 */
|
|
#ifdef FREEBSD
|
|
case SYS_msgsys:
|
|
case SYS_shmsys:
|
|
case SYS_semsys:
|
|
decode_subcall(tcp, 0, 0, table_style);
|
|
break;
|
|
#endif
|
|
#ifdef SUNOS4
|
|
case SYS_semsys:
|
|
decode_subcall(tcp, SYS_semsys_subcall,
|
|
SYS_semsys_nsubcalls, shift_style);
|
|
break;
|
|
case SYS_msgsys:
|
|
decode_subcall(tcp, SYS_msgsys_subcall,
|
|
SYS_msgsys_nsubcalls, shift_style);
|
|
break;
|
|
case SYS_shmsys:
|
|
decode_subcall(tcp, SYS_shmsys_subcall,
|
|
SYS_shmsys_nsubcalls, shift_style);
|
|
break;
|
|
#endif
|
|
}
|
|
|
|
internal_syscall(tcp);
|
|
if (tcp->scno >=0 && tcp->scno < nsyscalls && !(qual_flags[tcp->scno] & QUAL_TRACE)) {
|
|
tcp->flags |= TCB_INSYSCALL;
|
|
return 0;
|
|
}
|
|
|
|
if (cflag) {
|
|
gettimeofday(&tcp->etime, NULL);
|
|
tcp->flags |= TCB_INSYSCALL;
|
|
return 0;
|
|
}
|
|
|
|
printleader(tcp);
|
|
tcp->flags &= ~TCB_REPRINT;
|
|
tcp_last = tcp;
|
|
if (tcp->scno >= nsyscalls || tcp->scno < 0)
|
|
tprintf("syscall_%lu(", tcp->scno);
|
|
else
|
|
tprintf("%s(", sysent[tcp->scno].sys_name);
|
|
if (tcp->scno >= nsyscalls || tcp->scno < 0 ||
|
|
((qual_flags[tcp->scno] & QUAL_RAW) && tcp->scno != SYS_exit))
|
|
sys_res = printargs(tcp);
|
|
else
|
|
sys_res = (*sysent[tcp->scno].sys_func)(tcp);
|
|
if (fflush(tcp->outf) == EOF)
|
|
return -1;
|
|
tcp->flags |= TCB_INSYSCALL;
|
|
/* Measure the entrance time as late as possible to avoid errors. */
|
|
if (dtime)
|
|
gettimeofday(&tcp->etime, NULL);
|
|
return sys_res;
|
|
}
|
|
|
|
int
|
|
printargs(tcp)
|
|
struct tcb *tcp;
|
|
{
|
|
if (entering(tcp)) {
|
|
int i;
|
|
|
|
for (i = 0; i < tcp->u_nargs; i++)
|
|
tprintf("%s%#lx", i ? ", " : "", tcp->u_arg[i]);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
long
|
|
getrval2(tcp)
|
|
struct tcb *tcp;
|
|
{
|
|
long val = -1;
|
|
|
|
#ifdef LINUX
|
|
#ifdef SPARC
|
|
struct regs regs;
|
|
if (ptrace(PTRACE_GETREGS,tcp->pid,(char *)®s,0) < 0)
|
|
return -1;
|
|
val = regs.r_o1;
|
|
#endif /* SPARC */
|
|
#endif /* LINUX */
|
|
|
|
#ifdef SUNOS4
|
|
if (upeek(tcp->pid, uoff(u_rval2), &val) < 0)
|
|
return -1;
|
|
#endif /* SUNOS4 */
|
|
|
|
#ifdef SVR4
|
|
#ifdef SPARC
|
|
val = tcp->status.PR_REG[R_O1];
|
|
#endif /* SPARC */
|
|
#ifdef I386
|
|
val = tcp->status.PR_REG[EDX];
|
|
#endif /* I386 */
|
|
#ifdef MIPS
|
|
val = tcp->status.PR_REG[CTX_V1];
|
|
#endif /* MIPS */
|
|
#endif /* SVR4 */
|
|
#ifdef FREEBSD
|
|
struct reg regs;
|
|
pread(tcp->pfd_reg, ®s, sizeof(regs), 0);
|
|
val = regs.r_edx;
|
|
#endif
|
|
return val;
|
|
}
|
|
|
|
/*
|
|
* Apparently, indirect system calls have already be converted by ptrace(2),
|
|
* so if you see "indir" this program has gone astray.
|
|
*/
|
|
int
|
|
sys_indir(tcp)
|
|
struct tcb *tcp;
|
|
{
|
|
int i, scno, nargs;
|
|
|
|
if (entering(tcp)) {
|
|
if ((scno = tcp->u_arg[0]) > nsyscalls) {
|
|
fprintf(stderr, "Bogus syscall: %u\n", scno);
|
|
return 0;
|
|
}
|
|
nargs = sysent[scno].nargs;
|
|
tprintf("%s", sysent[scno].sys_name);
|
|
for (i = 0; i < nargs; i++)
|
|
tprintf(", %#lx", tcp->u_arg[i+1]);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
time_cmp(a, b)
|
|
void *a;
|
|
void *b;
|
|
{
|
|
return -tv_cmp(&tv_count[*((int *) a)], &tv_count[*((int *) b)]);
|
|
}
|
|
|
|
static int
|
|
syscall_cmp(a, b)
|
|
void *a;
|
|
void *b;
|
|
{
|
|
return strcmp(sysent[*((int *) a)].sys_name,
|
|
sysent[*((int *) b)].sys_name);
|
|
}
|
|
|
|
static int
|
|
count_cmp(a, b)
|
|
void *a;
|
|
void *b;
|
|
{
|
|
int m = call_count[*((int *) a)], n = call_count[*((int *) b)];
|
|
|
|
return (m < n) ? 1 : (m > n) ? -1 : 0;
|
|
}
|
|
|
|
static int (*sortfun)();
|
|
static struct timeval overhead = { -1, -1 };
|
|
|
|
void
|
|
set_sortby(sortby)
|
|
char *sortby;
|
|
{
|
|
if (strcmp(sortby, "time") == 0)
|
|
sortfun = time_cmp;
|
|
else if (strcmp(sortby, "calls") == 0)
|
|
sortfun = count_cmp;
|
|
else if (strcmp(sortby, "name") == 0)
|
|
sortfun = syscall_cmp;
|
|
else if (strcmp(sortby, "nothing") == 0)
|
|
sortfun = NULL;
|
|
else {
|
|
fprintf(stderr, "invalid sortby: `%s'\n", sortby);
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
void set_overhead(n)
|
|
int n;
|
|
{
|
|
overhead.tv_sec = n / 1000000;
|
|
overhead.tv_usec = n % 1000000;
|
|
}
|
|
|
|
void
|
|
call_summary(outf)
|
|
FILE *outf;
|
|
{
|
|
int i, j;
|
|
int call_cum, error_cum;
|
|
struct timeval tv_cum, dtv;
|
|
double percent;
|
|
char *dashes = "-------------------------";
|
|
char error_str[16];
|
|
|
|
call_cum = error_cum = tv_cum.tv_sec = tv_cum.tv_usec = 0;
|
|
if (overhead.tv_sec == -1) {
|
|
tv_mul(&overhead, &shortest, 8);
|
|
tv_div(&overhead, &overhead, 10);
|
|
}
|
|
for (i = 0; i < nsyscalls; i++) {
|
|
sorted_count[i] = i;
|
|
if (call_count[i] == 0)
|
|
continue;
|
|
tv_mul(&dtv, &overhead, call_count[i]);
|
|
tv_sub(&tv_count[i], &tv_count[i], &dtv);
|
|
call_cum += call_count[i];
|
|
error_cum += error_count[i];
|
|
tv_add(&tv_cum, &tv_cum, &tv_count[i]);
|
|
}
|
|
if (sortfun)
|
|
qsort((void *) sorted_count, nsyscalls, sizeof(int), sortfun);
|
|
fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %s\n",
|
|
"% time", "seconds", "usecs/call",
|
|
"calls", "errors", "syscall");
|
|
fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %-16.16s\n",
|
|
dashes, dashes, dashes, dashes, dashes, dashes);
|
|
for (i = 0; i < nsyscalls; i++) {
|
|
j = sorted_count[i];
|
|
if (call_count[j] == 0)
|
|
continue;
|
|
tv_div(&dtv, &tv_count[j], call_count[j]);
|
|
if (error_count[j])
|
|
sprintf(error_str, "%d", error_count[j]);
|
|
else
|
|
error_str[0] = '\0';
|
|
percent = 100.0*tv_float(&tv_count[j])/tv_float(&tv_cum);
|
|
fprintf(outf, "%6.2f %4ld.%06ld %11ld %9d %9.9s %s\n",
|
|
percent, (long) tv_count[j].tv_sec,
|
|
(long) tv_count[j].tv_usec,
|
|
(long) 1000000 * dtv.tv_sec + dtv.tv_usec,
|
|
call_count[j], error_str, sysent[j].sys_name);
|
|
}
|
|
fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %-16.16s\n",
|
|
dashes, dashes, dashes, dashes, dashes, dashes);
|
|
if (error_cum)
|
|
sprintf(error_str, "%d", error_cum);
|
|
else
|
|
error_str[0] = '\0';
|
|
fprintf(outf, "%6.6s %4ld.%06ld %11.11s %9d %9.9s %s\n",
|
|
"100.00", (long) tv_cum.tv_sec, (long) tv_cum.tv_usec, "",
|
|
call_cum, error_str, "total");
|
|
}
|