79a79ea851
After recent change, select(2^31-1, NULL, NULL, NULL) would make strace exit. This change caps fdsize so that it is always in [0, 1025*1024], IOW: we will try to allocate at most 1 megabyte, which in practice will almost always work, unlike malloc(2Gig). * desc.c (decode_select): Cap fdsize to 1024*1024. * pathtrace.c (pathtrace_match): Cap fdsize to 1024*1024. * file.c (sys_getdents): Cap len to 1024*1024. (sys_getdents64): Cap len to 1024*1024. * util.c (dumpiov): Refuse to process iov with more than 1024*1024 elements. Don't die on malloc failure. (dumpstr): Don't die on malloc failure. Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
1781 lines
39 KiB
C
1781 lines
39 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 <sys/syscall.h>
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#include <sys/user.h>
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#include <sys/param.h>
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#include <fcntl.h>
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#if HAVE_SYS_UIO_H
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#include <sys/uio.h>
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#endif
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#ifdef SUNOS4
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#include <machine/reg.h>
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#include <a.out.h>
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#include <link.h>
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#endif /* SUNOS4 */
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#if defined(linux) && (__GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 1))
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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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#ifdef HAVE_SYS_REG_H
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#include <sys/reg.h>
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# define PTRACE_PEEKUSR PTRACE_PEEKUSER
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#elif defined(HAVE_LINUX_PTRACE_H)
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#undef PTRACE_SYSCALL
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# ifdef HAVE_STRUCT_IA64_FPREG
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# define ia64_fpreg XXX_ia64_fpreg
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# endif
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# ifdef HAVE_STRUCT_PT_ALL_USER_REGS
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# define pt_all_user_regs XXX_pt_all_user_regs
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# endif
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#include <linux/ptrace.h>
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# undef ia64_fpreg
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# undef pt_all_user_regs
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#endif
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#ifdef SUNOS4_KERNEL_ARCH_KLUDGE
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#include <sys/utsname.h>
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#endif /* SUNOS4_KERNEL_ARCH_KLUDGE */
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#if defined(LINUXSPARC) && defined (SPARC64)
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# undef PTRACE_GETREGS
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# define PTRACE_GETREGS PTRACE_GETREGS64
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# undef PTRACE_SETREGS
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# define PTRACE_SETREGS PTRACE_SETREGS64
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#endif
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|
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/* macros */
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#ifndef MAX
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#define MAX(a,b) (((a) > (b)) ? (a) : (b))
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#endif
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#ifndef MIN
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#define MIN(a,b) (((a) < (b)) ? (a) : (b))
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#endif
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int
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tv_nz(struct timeval *a)
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{
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return a->tv_sec || a->tv_usec;
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}
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int
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tv_cmp(struct timeval *a, struct timeval *b)
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{
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if (a->tv_sec < b->tv_sec
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|| (a->tv_sec == b->tv_sec && a->tv_usec < b->tv_usec))
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return -1;
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if (a->tv_sec > b->tv_sec
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|| (a->tv_sec == b->tv_sec && a->tv_usec > b->tv_usec))
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return 1;
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return 0;
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}
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double
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tv_float(struct timeval *tv)
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{
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return tv->tv_sec + tv->tv_usec/1000000.0;
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}
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void
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tv_add(struct timeval *tv, struct timeval *a, struct timeval *b)
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{
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tv->tv_sec = a->tv_sec + b->tv_sec;
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tv->tv_usec = a->tv_usec + b->tv_usec;
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if (tv->tv_usec >= 1000000) {
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tv->tv_sec++;
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tv->tv_usec -= 1000000;
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}
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}
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void
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tv_sub(struct timeval *tv, struct timeval *a, struct timeval *b)
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{
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tv->tv_sec = a->tv_sec - b->tv_sec;
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tv->tv_usec = a->tv_usec - b->tv_usec;
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if (((long) tv->tv_usec) < 0) {
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tv->tv_sec--;
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tv->tv_usec += 1000000;
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}
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}
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void
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tv_div(struct timeval *tv, struct timeval *a, int n)
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{
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tv->tv_usec = (a->tv_sec % n * 1000000 + a->tv_usec + n / 2) / n;
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tv->tv_sec = a->tv_sec / n + tv->tv_usec / 1000000;
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tv->tv_usec %= 1000000;
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}
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void
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tv_mul(struct timeval *tv, struct timeval *a, int n)
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{
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tv->tv_usec = a->tv_usec * n;
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tv->tv_sec = a->tv_sec * n + tv->tv_usec / 1000000;
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tv->tv_usec %= 1000000;
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}
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const char *
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xlookup(const struct xlat *xlat, int val)
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{
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for (; xlat->str != NULL; xlat++)
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if (xlat->val == val)
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return xlat->str;
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return NULL;
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}
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#if !defined HAVE_STPCPY
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char *
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stpcpy(char *dst, const char *src)
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{
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|
while ((*dst = *src++) != '\0')
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dst++;
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return dst;
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}
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#endif
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/*
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* Generic ptrace wrapper which tracks ESRCH errors
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* by setting tcp->ptrace_errno to ESRCH.
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*
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* We assume that ESRCH indicates likely process death (SIGKILL?),
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* modulo bugs where process somehow ended up not stopped.
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* Unfortunately kernel uses ESRCH for that case too. Oh well.
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*
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* Currently used by upeek() only.
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* TODO: use this in all other ptrace() calls while decoding.
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*/
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long
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do_ptrace(int request, struct tcb *tcp, void *addr, void *data)
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|
{
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long l;
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|
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errno = 0;
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l = ptrace(request, tcp->pid, addr, (long) data);
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/* Non-ESRCH errors might be our invalid reg/mem accesses,
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* we do not record them. */
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if (errno == ESRCH)
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tcp->ptrace_errno = ESRCH;
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return l;
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}
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/*
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* Used when we want to unblock stopped traced process.
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* Should be only used with PTRACE_CONT, PTRACE_DETACH and PTRACE_SYSCALL.
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* Returns 0 on success or if error was ESRCH
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* (presumably process was killed while we talk to it).
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* Otherwise prints error message and returns -1.
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*/
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|
int
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|
ptrace_restart(int op, struct tcb *tcp, int sig)
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|
{
|
|
int err;
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const char *msg;
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errno = 0;
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ptrace(op, tcp->pid, (void *) 1, (long) sig);
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err = errno;
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if (!err || err == ESRCH)
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return 0;
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|
tcp->ptrace_errno = err;
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msg = "SYSCALL";
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if (op == PTRACE_CONT)
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msg = "CONT";
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if (op == PTRACE_DETACH)
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msg = "DETACH";
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fprintf(stderr, "strace: ptrace(PTRACE_%s,1,%d): %s\n",
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msg, sig, strerror(err));
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return -1;
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}
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/*
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* Print entry in struct xlat table, if there.
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*/
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void
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printxval(const struct xlat *xlat, int val, const char *dflt)
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|
{
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const char *str = xlookup(xlat, val);
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if (str)
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tprints(str);
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else
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tprintf("%#x /* %s */", val, dflt);
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}
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|
|
#if HAVE_LONG_LONG
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|
/*
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|
* Print 64bit argument at position llarg and return the index of the next
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* argument.
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*/
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|
int
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printllval(struct tcb *tcp, const char *format, int llarg)
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|
{
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|
# if defined(FREEBSD) \
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|| (defined(LINUX) && defined(POWERPC) && !defined(POWERPC64)) \
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|| defined(LINUX_MIPSO32) \
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|| defined(__ARM_EABI__)
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|
/* Align 64bit argument to 64bit boundary. */
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|
llarg = (llarg + 1) & 0x1e;
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# endif
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# if defined LINUX && (defined X86_64 || defined POWERPC64)
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if (current_personality == 0) {
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tprintf(format, tcp->u_arg[llarg]);
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llarg++;
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} else {
|
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# ifdef POWERPC64
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|
/* Align 64bit argument to 64bit boundary. */
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|
llarg = (llarg + 1) & 0x1e;
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# endif
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tprintf(format, LONG_LONG(tcp->u_arg[llarg], tcp->u_arg[llarg + 1]));
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llarg += 2;
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}
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# elif defined IA64 || defined ALPHA
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tprintf(format, tcp->u_arg[llarg]);
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llarg++;
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# elif defined LINUX_MIPSN32
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tprintf(format, tcp->ext_arg[llarg]);
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llarg++;
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# else
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tprintf(format, LONG_LONG(tcp->u_arg[llarg], tcp->u_arg[llarg + 1]));
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llarg += 2;
|
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# endif
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return llarg;
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}
|
|
#endif
|
|
|
|
/*
|
|
* Interpret `xlat' as an array of flags
|
|
* print the entries whose bits are on in `flags'
|
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* return # of flags printed.
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|
*/
|
|
void
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|
addflags(const struct xlat *xlat, int flags)
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|
{
|
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for (; xlat->str; xlat++) {
|
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if (xlat->val && (flags & xlat->val) == xlat->val) {
|
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tprintf("|%s", xlat->str);
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flags &= ~xlat->val;
|
|
}
|
|
}
|
|
if (flags) {
|
|
tprintf("|%#x", flags);
|
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}
|
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}
|
|
|
|
/*
|
|
* Interpret `xlat' as an array of flags.
|
|
* Print to static string the entries whose bits are on in `flags'
|
|
* Return static string.
|
|
*/
|
|
const char *
|
|
sprintflags(const char *prefix, const struct xlat *xlat, int flags)
|
|
{
|
|
static char outstr[1024];
|
|
char *outptr;
|
|
int found = 0;
|
|
|
|
outptr = stpcpy(outstr, prefix);
|
|
|
|
for (; xlat->str; xlat++) {
|
|
if ((flags & xlat->val) == xlat->val) {
|
|
if (found)
|
|
*outptr++ = '|';
|
|
outptr = stpcpy(outptr, xlat->str);
|
|
flags &= ~xlat->val;
|
|
found = 1;
|
|
}
|
|
}
|
|
if (flags) {
|
|
if (found)
|
|
*outptr++ = '|';
|
|
outptr += sprintf(outptr, "%#x", flags);
|
|
}
|
|
|
|
return outstr;
|
|
}
|
|
|
|
int
|
|
printflags(const struct xlat *xlat, int flags, const char *dflt)
|
|
{
|
|
int n;
|
|
const char *sep;
|
|
|
|
if (flags == 0 && xlat->val == 0) {
|
|
tprints(xlat->str);
|
|
return 1;
|
|
}
|
|
|
|
sep = "";
|
|
for (n = 0; xlat->str; xlat++) {
|
|
if (xlat->val && (flags & xlat->val) == xlat->val) {
|
|
tprintf("%s%s", sep, xlat->str);
|
|
flags &= ~xlat->val;
|
|
sep = "|";
|
|
n++;
|
|
}
|
|
}
|
|
|
|
if (n) {
|
|
if (flags) {
|
|
tprintf("%s%#x", sep, flags);
|
|
n++;
|
|
}
|
|
} else {
|
|
if (flags) {
|
|
tprintf("%#x", flags);
|
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if (dflt)
|
|
tprintf(" /* %s */", dflt);
|
|
} else {
|
|
if (dflt)
|
|
tprints("0");
|
|
}
|
|
}
|
|
|
|
return n;
|
|
}
|
|
|
|
void
|
|
printnum(struct tcb *tcp, long addr, const char *fmt)
|
|
{
|
|
long num;
|
|
|
|
if (!addr) {
|
|
tprints("NULL");
|
|
return;
|
|
}
|
|
if (umove(tcp, addr, &num) < 0) {
|
|
tprintf("%#lx", addr);
|
|
return;
|
|
}
|
|
tprints("[");
|
|
tprintf(fmt, num);
|
|
tprints("]");
|
|
}
|
|
|
|
void
|
|
printnum_int(struct tcb *tcp, long addr, const char *fmt)
|
|
{
|
|
int num;
|
|
|
|
if (!addr) {
|
|
tprints("NULL");
|
|
return;
|
|
}
|
|
if (umove(tcp, addr, &num) < 0) {
|
|
tprintf("%#lx", addr);
|
|
return;
|
|
}
|
|
tprints("[");
|
|
tprintf(fmt, num);
|
|
tprints("]");
|
|
}
|
|
|
|
void
|
|
printfd(struct tcb *tcp, int fd)
|
|
{
|
|
const char *p;
|
|
|
|
if (show_fd_path && (p = getfdpath(tcp, fd)))
|
|
tprintf("%d<%s>", fd, p);
|
|
else
|
|
tprintf("%d", fd);
|
|
}
|
|
|
|
void
|
|
printuid(const char *text, unsigned long uid)
|
|
{
|
|
tprintf((uid == -1) ? "%s%ld" : "%s%lu", text, uid);
|
|
}
|
|
|
|
static char path[MAXPATHLEN + 1];
|
|
|
|
/*
|
|
* Quote string `instr' of length `size'
|
|
* Write up to (3 + `size' * 4) bytes to `outstr' buffer.
|
|
* If `len' < 0, treat `instr' as a NUL-terminated string
|
|
* and quote at most (`size' - 1) bytes.
|
|
*/
|
|
static int
|
|
string_quote(const char *instr, char *outstr, int len, int size)
|
|
{
|
|
const unsigned char *ustr = (const unsigned char *) instr;
|
|
char *s = outstr;
|
|
int usehex, c, i, eol;
|
|
|
|
eol = 0x100; /* this can never match a char */
|
|
if (len < 0) {
|
|
size--;
|
|
eol = '\0';
|
|
}
|
|
|
|
usehex = 0;
|
|
if (xflag > 1)
|
|
usehex = 1;
|
|
else if (xflag) {
|
|
/* Check for presence of symbol which require
|
|
to hex-quote the whole string. */
|
|
for (i = 0; i < size; ++i) {
|
|
c = ustr[i];
|
|
/* Check for NUL-terminated string. */
|
|
if (c == eol)
|
|
break;
|
|
if (!isprint(c) && !isspace(c)) {
|
|
usehex = 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
*s++ = '\"';
|
|
|
|
if (usehex) {
|
|
/* Hex-quote the whole string. */
|
|
for (i = 0; i < size; ++i) {
|
|
c = ustr[i];
|
|
/* Check for NUL-terminated string. */
|
|
if (c == eol)
|
|
goto asciz_ended;
|
|
*s++ = '\\';
|
|
*s++ = 'x';
|
|
*s++ = "0123456789abcdef"[c >> 4];
|
|
*s++ = "0123456789abcdef"[c & 0xf];
|
|
}
|
|
} else {
|
|
for (i = 0; i < size; ++i) {
|
|
c = ustr[i];
|
|
/* Check for NUL-terminated string. */
|
|
if (c == eol)
|
|
goto asciz_ended;
|
|
switch (c) {
|
|
case '\"': case '\\':
|
|
*s++ = '\\';
|
|
*s++ = c;
|
|
break;
|
|
case '\f':
|
|
*s++ = '\\';
|
|
*s++ = 'f';
|
|
break;
|
|
case '\n':
|
|
*s++ = '\\';
|
|
*s++ = 'n';
|
|
break;
|
|
case '\r':
|
|
*s++ = '\\';
|
|
*s++ = 'r';
|
|
break;
|
|
case '\t':
|
|
*s++ = '\\';
|
|
*s++ = 't';
|
|
break;
|
|
case '\v':
|
|
*s++ = '\\';
|
|
*s++ = 'v';
|
|
break;
|
|
default:
|
|
if (isprint(c))
|
|
*s++ = c;
|
|
else {
|
|
/* Print \octal */
|
|
*s++ = '\\';
|
|
if (i + 1 < size
|
|
&& ustr[i + 1] >= '0'
|
|
&& ustr[i + 1] <= '9'
|
|
) {
|
|
/* Print \ooo */
|
|
*s++ = '0' + (c >> 6);
|
|
*s++ = '0' + ((c >> 3) & 0x7);
|
|
} else {
|
|
/* Print \[[o]o]o */
|
|
if ((c >> 3) != 0) {
|
|
if ((c >> 6) != 0)
|
|
*s++ = '0' + (c >> 6);
|
|
*s++ = '0' + ((c >> 3) & 0x7);
|
|
}
|
|
}
|
|
*s++ = '0' + (c & 0x7);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
*s++ = '\"';
|
|
*s = '\0';
|
|
|
|
/* Return zero if we printed entire ASCIZ string (didn't truncate it) */
|
|
if (len < 0 && ustr[i] == '\0') {
|
|
/* We didn't see NUL yet (otherwise we'd jump to 'asciz_ended')
|
|
* but next char is NUL.
|
|
*/
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
|
|
asciz_ended:
|
|
*s++ = '\"';
|
|
*s = '\0';
|
|
/* Return zero: we printed entire ASCIZ string (didn't truncate it) */
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Print path string specified by address `addr' and length `n'.
|
|
* If path length exceeds `n', append `...' to the output.
|
|
*/
|
|
void
|
|
printpathn(struct tcb *tcp, long addr, int n)
|
|
{
|
|
if (!addr) {
|
|
tprints("NULL");
|
|
return;
|
|
}
|
|
|
|
/* Cap path length to the path buffer size,
|
|
and NUL-terminate the buffer. */
|
|
if (n > sizeof path - 1)
|
|
n = sizeof path - 1;
|
|
path[n] = '\0';
|
|
|
|
/* Fetch one byte more to find out whether path length > n. */
|
|
if (umovestr(tcp, addr, n + 1, path) < 0)
|
|
tprintf("%#lx", addr);
|
|
else {
|
|
static char outstr[4*(sizeof path - 1) + sizeof "\"...\""];
|
|
const char *fmt;
|
|
int trunc = (path[n] != '\0');
|
|
|
|
if (trunc)
|
|
path[n] = '\0';
|
|
string_quote(path, outstr, -1, n + 1);
|
|
fmt = "%s";
|
|
if (trunc)
|
|
fmt = "%s...";
|
|
tprintf(fmt, outstr);
|
|
}
|
|
}
|
|
|
|
void
|
|
printpath(struct tcb *tcp, long addr)
|
|
{
|
|
printpathn(tcp, addr, sizeof path - 1);
|
|
}
|
|
|
|
/*
|
|
* Print string specified by address `addr' and length `len'.
|
|
* If `len' < 0, treat the string as a NUL-terminated string.
|
|
* If string length exceeds `max_strlen', append `...' to the output.
|
|
*/
|
|
void
|
|
printstr(struct tcb *tcp, long addr, int len)
|
|
{
|
|
static char *str = NULL;
|
|
static char *outstr;
|
|
int size;
|
|
const char *fmt;
|
|
|
|
if (!addr) {
|
|
tprints("NULL");
|
|
return;
|
|
}
|
|
/* Allocate static buffers if they are not allocated yet. */
|
|
if (!str) {
|
|
str = malloc(max_strlen + 1);
|
|
if (!str)
|
|
die_out_of_memory();
|
|
}
|
|
if (!outstr) {
|
|
outstr = malloc(4 * max_strlen + sizeof "\"...\"");
|
|
if (!outstr)
|
|
die_out_of_memory();
|
|
}
|
|
|
|
if (len < 0) {
|
|
/*
|
|
* Treat as a NUL-terminated string: fetch one byte more
|
|
* because string_quote() quotes one byte less.
|
|
*/
|
|
size = max_strlen + 1;
|
|
str[max_strlen] = '\0';
|
|
/* FIXME! umovestr can overwrite the '\0' stored above??? */
|
|
if (umovestr(tcp, addr, size, str) < 0) {
|
|
tprintf("%#lx", addr);
|
|
return;
|
|
}
|
|
}
|
|
else {
|
|
size = MIN(len, max_strlen);
|
|
if (umoven(tcp, addr, size, str) < 0) {
|
|
tprintf("%#lx", addr);
|
|
return;
|
|
}
|
|
}
|
|
|
|
fmt = "%s";
|
|
if (string_quote(str, outstr, len, size) &&
|
|
(len < 0 || len > max_strlen))
|
|
fmt = "%s...";
|
|
|
|
tprintf(fmt, outstr);
|
|
}
|
|
|
|
#if HAVE_SYS_UIO_H
|
|
void
|
|
dumpiov(struct tcb *tcp, int len, long addr)
|
|
{
|
|
#if defined(LINUX) && SUPPORTED_PERSONALITIES > 1
|
|
union {
|
|
struct { u_int32_t base; u_int32_t len; } *iov32;
|
|
struct { u_int64_t base; u_int64_t len; } *iov64;
|
|
} iovu;
|
|
#define iov iovu.iov64
|
|
#define sizeof_iov \
|
|
(personality_wordsize[current_personality] == 4 \
|
|
? sizeof(*iovu.iov32) : sizeof(*iovu.iov64))
|
|
#define iov_iov_base(i) \
|
|
(personality_wordsize[current_personality] == 4 \
|
|
? (u_int64_t) iovu.iov32[i].base : iovu.iov64[i].base)
|
|
#define iov_iov_len(i) \
|
|
(personality_wordsize[current_personality] == 4 \
|
|
? (u_int64_t) iovu.iov32[i].len : iovu.iov64[i].len)
|
|
#else
|
|
struct iovec *iov;
|
|
#define sizeof_iov sizeof(*iov)
|
|
#define iov_iov_base(i) iov[i].iov_base
|
|
#define iov_iov_len(i) iov[i].iov_len
|
|
#endif
|
|
int i;
|
|
unsigned size;
|
|
|
|
size = sizeof_iov * len;
|
|
/* Assuming no sane program has millions of iovs */
|
|
if ((unsigned)len > 1024*1024 /* insane or negative size? */
|
|
|| (iov = malloc(size)) == NULL) {
|
|
fprintf(stderr, "Out of memory\n");
|
|
return;
|
|
}
|
|
if (umoven(tcp, addr, size, (char *) iov) >= 0) {
|
|
for (i = 0; i < len; i++) {
|
|
/* include the buffer number to make it easy to
|
|
* match up the trace with the source */
|
|
tprintf(" * %lu bytes in buffer %d\n",
|
|
(unsigned long)iov_iov_len(i), i);
|
|
dumpstr(tcp, (long) iov_iov_base(i),
|
|
iov_iov_len(i));
|
|
}
|
|
}
|
|
free(iov);
|
|
#undef sizeof_iov
|
|
#undef iov_iov_base
|
|
#undef iov_iov_len
|
|
#undef iov
|
|
}
|
|
#endif
|
|
|
|
void
|
|
dumpstr(struct tcb *tcp, long addr, int len)
|
|
{
|
|
static int strsize = -1;
|
|
static unsigned char *str;
|
|
char *s;
|
|
int i, j;
|
|
|
|
if (strsize < len) {
|
|
free(str);
|
|
str = malloc(len);
|
|
if (!str) {
|
|
strsize = -1;
|
|
fprintf(stderr, "Out of memory\n");
|
|
return;
|
|
}
|
|
strsize = len;
|
|
}
|
|
|
|
if (umoven(tcp, addr, len, (char *) str) < 0)
|
|
return;
|
|
|
|
for (i = 0; i < len; i += 16) {
|
|
char outstr[80];
|
|
|
|
s = outstr;
|
|
sprintf(s, " | %05x ", i);
|
|
s += 9;
|
|
for (j = 0; j < 16; j++) {
|
|
if (j == 8)
|
|
*s++ = ' ';
|
|
if (i + j < len) {
|
|
sprintf(s, " %02x", str[i + j]);
|
|
s += 3;
|
|
}
|
|
else {
|
|
*s++ = ' '; *s++ = ' '; *s++ = ' ';
|
|
}
|
|
}
|
|
*s++ = ' '; *s++ = ' ';
|
|
for (j = 0; j < 16; j++) {
|
|
if (j == 8)
|
|
*s++ = ' ';
|
|
if (i + j < len) {
|
|
if (isprint(str[i + j]))
|
|
*s++ = str[i + j];
|
|
else
|
|
*s++ = '.';
|
|
}
|
|
else
|
|
*s++ = ' ';
|
|
}
|
|
tprintf("%s |\n", outstr);
|
|
}
|
|
}
|
|
|
|
#define PAGMASK (~(PAGSIZ - 1))
|
|
/*
|
|
* move `len' bytes of data from process `pid'
|
|
* at address `addr' to our space at `laddr'
|
|
*/
|
|
int
|
|
umoven(struct tcb *tcp, long addr, int len, char *laddr)
|
|
{
|
|
#ifdef LINUX
|
|
int pid = tcp->pid;
|
|
int n, m;
|
|
int started = 0;
|
|
union {
|
|
long val;
|
|
char x[sizeof(long)];
|
|
} u;
|
|
|
|
if (addr & (sizeof(long) - 1)) {
|
|
/* addr not a multiple of sizeof(long) */
|
|
n = addr - (addr & -sizeof(long)); /* residue */
|
|
addr &= -sizeof(long); /* residue */
|
|
errno = 0;
|
|
u.val = ptrace(PTRACE_PEEKDATA, pid, (char *) addr, 0);
|
|
if (errno) {
|
|
if (started && (errno==EPERM || errno==EIO)) {
|
|
/* Ran into 'end of memory' - stupid "printpath" */
|
|
return 0;
|
|
}
|
|
/* But if not started, we had a bogus address. */
|
|
if (addr != 0 && errno != EIO && errno != ESRCH)
|
|
perror("ptrace: umoven");
|
|
return -1;
|
|
}
|
|
started = 1;
|
|
memcpy(laddr, &u.x[n], m = MIN(sizeof(long) - n, len));
|
|
addr += sizeof(long), laddr += m, len -= m;
|
|
}
|
|
while (len) {
|
|
errno = 0;
|
|
u.val = ptrace(PTRACE_PEEKDATA, pid, (char *) addr, 0);
|
|
if (errno) {
|
|
if (started && (errno==EPERM || errno==EIO)) {
|
|
/* Ran into 'end of memory' - stupid "printpath" */
|
|
return 0;
|
|
}
|
|
if (addr != 0 && errno != EIO && errno != ESRCH)
|
|
perror("ptrace: umoven");
|
|
return -1;
|
|
}
|
|
started = 1;
|
|
memcpy(laddr, u.x, m = MIN(sizeof(long), len));
|
|
addr += sizeof(long), laddr += m, len -= m;
|
|
}
|
|
#endif /* LINUX */
|
|
|
|
#ifdef SUNOS4
|
|
int pid = tcp->pid;
|
|
int n;
|
|
|
|
while (len) {
|
|
n = MIN(len, PAGSIZ);
|
|
n = MIN(n, ((addr + PAGSIZ) & PAGMASK) - addr);
|
|
if (ptrace(PTRACE_READDATA, pid,
|
|
(char *) addr, len, laddr) < 0) {
|
|
if (errno != ESRCH) {
|
|
perror("umoven: ptrace(PTRACE_READDATA, ...)");
|
|
abort();
|
|
}
|
|
return -1;
|
|
}
|
|
len -= n;
|
|
addr += n;
|
|
laddr += n;
|
|
}
|
|
#endif /* SUNOS4 */
|
|
|
|
#ifdef USE_PROCFS
|
|
#ifdef HAVE_MP_PROCFS
|
|
int fd = tcp->pfd_as;
|
|
#else
|
|
int fd = tcp->pfd;
|
|
#endif
|
|
lseek(fd, addr, SEEK_SET);
|
|
if (read(fd, laddr, len) == -1)
|
|
return -1;
|
|
#endif /* USE_PROCFS */
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* like `umove' but make the additional effort of looking
|
|
* for a terminating zero byte.
|
|
*/
|
|
int
|
|
umovestr(struct tcb *tcp, long addr, int len, char *laddr)
|
|
{
|
|
#ifdef USE_PROCFS
|
|
#ifdef HAVE_MP_PROCFS
|
|
int fd = tcp->pfd_as;
|
|
#else
|
|
int fd = tcp->pfd;
|
|
#endif
|
|
/* Some systems (e.g. FreeBSD) can be upset if we read off the
|
|
end of valid memory, avoid this by trying to read up
|
|
to page boundaries. But we don't know what a page is (and
|
|
getpagesize(2) (if it exists) doesn't necessarily return
|
|
hardware page size). Assume all pages >= 1024 (a-historical
|
|
I know) */
|
|
|
|
int page = 1024; /* How to find this? */
|
|
int move = page - (addr & (page - 1));
|
|
int left = len;
|
|
|
|
lseek(fd, addr, SEEK_SET);
|
|
|
|
while (left) {
|
|
if (move > left)
|
|
move = left;
|
|
move = read(fd, laddr, move);
|
|
if (move <= 0)
|
|
return left != len ? 0 : -1;
|
|
if (memchr(laddr, 0, move))
|
|
break;
|
|
left -= move;
|
|
laddr += move;
|
|
addr += move;
|
|
move = page;
|
|
}
|
|
#else /* !USE_PROCFS */
|
|
int started = 0;
|
|
int pid = tcp->pid;
|
|
int i, n, m;
|
|
union {
|
|
long val;
|
|
char x[sizeof(long)];
|
|
} u;
|
|
|
|
if (addr & (sizeof(long) - 1)) {
|
|
/* addr not a multiple of sizeof(long) */
|
|
n = addr - (addr & -sizeof(long)); /* residue */
|
|
addr &= -sizeof(long); /* residue */
|
|
errno = 0;
|
|
u.val = ptrace(PTRACE_PEEKDATA, pid, (char *)addr, 0);
|
|
if (errno) {
|
|
if (started && (errno==EPERM || errno==EIO)) {
|
|
/* Ran into 'end of memory' - stupid "printpath" */
|
|
return 0;
|
|
}
|
|
if (addr != 0 && errno != EIO && errno != ESRCH)
|
|
perror("umovestr");
|
|
return -1;
|
|
}
|
|
started = 1;
|
|
memcpy(laddr, &u.x[n], m = MIN(sizeof(long)-n, len));
|
|
while (n & (sizeof(long) - 1))
|
|
if (u.x[n++] == '\0')
|
|
return 0;
|
|
addr += sizeof(long), laddr += m, len -= m;
|
|
}
|
|
while (len) {
|
|
errno = 0;
|
|
u.val = ptrace(PTRACE_PEEKDATA, pid, (char *)addr, 0);
|
|
if (errno) {
|
|
if (started && (errno==EPERM || errno==EIO)) {
|
|
/* Ran into 'end of memory' - stupid "printpath" */
|
|
return 0;
|
|
}
|
|
if (addr != 0 && errno != EIO && errno != ESRCH)
|
|
perror("umovestr");
|
|
return -1;
|
|
}
|
|
started = 1;
|
|
memcpy(laddr, u.x, m = MIN(sizeof(long), len));
|
|
for (i = 0; i < sizeof(long); i++)
|
|
if (u.x[i] == '\0')
|
|
return 0;
|
|
|
|
addr += sizeof(long), laddr += m, len -= m;
|
|
}
|
|
#endif /* !USE_PROCFS */
|
|
return 0;
|
|
}
|
|
|
|
#ifdef LINUX
|
|
# if !defined (SPARC) && !defined(SPARC64)
|
|
# define PTRACE_WRITETEXT 101
|
|
# define PTRACE_WRITEDATA 102
|
|
# endif /* !SPARC && !SPARC64 */
|
|
#endif /* LINUX */
|
|
|
|
#ifdef SUNOS4
|
|
|
|
static int
|
|
uload(int cmd, int pid, long addr, int len, char *laddr)
|
|
{
|
|
int peek, poke;
|
|
int n, m;
|
|
union {
|
|
long val;
|
|
char x[sizeof(long)];
|
|
} u;
|
|
|
|
if (cmd == PTRACE_WRITETEXT) {
|
|
peek = PTRACE_PEEKTEXT;
|
|
poke = PTRACE_POKETEXT;
|
|
}
|
|
else {
|
|
peek = PTRACE_PEEKDATA;
|
|
poke = PTRACE_POKEDATA;
|
|
}
|
|
if (addr & (sizeof(long) - 1)) {
|
|
/* addr not a multiple of sizeof(long) */
|
|
n = addr - (addr & -sizeof(long)); /* residue */
|
|
addr &= -sizeof(long);
|
|
errno = 0;
|
|
u.val = ptrace(peek, pid, (char *) addr, 0);
|
|
if (errno) {
|
|
perror("uload: POKE");
|
|
return -1;
|
|
}
|
|
memcpy(&u.x[n], laddr, m = MIN(sizeof(long) - n, len));
|
|
if (ptrace(poke, pid, (char *)addr, u.val) < 0) {
|
|
perror("uload: POKE");
|
|
return -1;
|
|
}
|
|
addr += sizeof(long), laddr += m, len -= m;
|
|
}
|
|
while (len) {
|
|
if (len < sizeof(long))
|
|
u.val = ptrace(peek, pid, (char *) addr, 0);
|
|
memcpy(u.x, laddr, m = MIN(sizeof(long), len));
|
|
if (ptrace(poke, pid, (char *) addr, u.val) < 0) {
|
|
perror("uload: POKE");
|
|
return -1;
|
|
}
|
|
addr += sizeof(long), laddr += m, len -= m;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
tload(int pid, int addr, int len, char *laddr)
|
|
{
|
|
return uload(PTRACE_WRITETEXT, pid, addr, len, laddr);
|
|
}
|
|
|
|
int
|
|
dload(int pid, int addr, int len, char *laddr)
|
|
{
|
|
return uload(PTRACE_WRITEDATA, pid, addr, len, laddr);
|
|
}
|
|
|
|
#endif /* SUNOS4 */
|
|
|
|
#ifndef USE_PROCFS
|
|
|
|
int
|
|
upeek(struct tcb *tcp, long off, long *res)
|
|
{
|
|
long val;
|
|
|
|
# ifdef SUNOS4_KERNEL_ARCH_KLUDGE
|
|
{
|
|
static int is_sun4m = -1;
|
|
struct utsname name;
|
|
|
|
/* Round up the usual suspects. */
|
|
if (is_sun4m == -1) {
|
|
if (uname(&name) < 0) {
|
|
perror("upeek: uname?");
|
|
exit(1);
|
|
}
|
|
is_sun4m = strcmp(name.machine, "sun4m") == 0;
|
|
if (is_sun4m) {
|
|
const struct xlat *x;
|
|
|
|
for (x = struct_user_offsets; x->str; x++)
|
|
x->val += 1024;
|
|
}
|
|
}
|
|
if (is_sun4m)
|
|
off += 1024;
|
|
}
|
|
# endif /* SUNOS4_KERNEL_ARCH_KLUDGE */
|
|
errno = 0;
|
|
val = do_ptrace(PTRACE_PEEKUSER, tcp, (char *) off, 0);
|
|
if (val == -1 && errno) {
|
|
if (errno != ESRCH) {
|
|
char buf[60];
|
|
sprintf(buf, "upeek: ptrace(PTRACE_PEEKUSER,%d,%lu,0)", tcp->pid, off);
|
|
perror(buf);
|
|
}
|
|
return -1;
|
|
}
|
|
*res = val;
|
|
return 0;
|
|
}
|
|
|
|
#endif /* !USE_PROCFS */
|
|
|
|
void
|
|
printcall(struct tcb *tcp)
|
|
{
|
|
#define PRINTBADPC tprintf(sizeof(long) == 4 ? "[????????] " : \
|
|
sizeof(long) == 8 ? "[????????????????] " : \
|
|
NULL /* crash */)
|
|
|
|
#ifdef LINUX
|
|
# ifdef I386
|
|
long eip;
|
|
|
|
if (upeek(tcp, 4*EIP, &eip) < 0) {
|
|
PRINTBADPC;
|
|
return;
|
|
}
|
|
tprintf("[%08lx] ", eip);
|
|
|
|
# elif defined(S390) || defined(S390X)
|
|
long psw;
|
|
if (upeek(tcp, PT_PSWADDR, &psw) < 0) {
|
|
PRINTBADPC;
|
|
return;
|
|
}
|
|
# ifdef S390
|
|
tprintf("[%08lx] ", psw);
|
|
# elif S390X
|
|
tprintf("[%16lx] ", psw);
|
|
# endif
|
|
|
|
# elif defined(X86_64)
|
|
long rip;
|
|
|
|
if (upeek(tcp, 8*RIP, &rip) < 0) {
|
|
PRINTBADPC;
|
|
return;
|
|
}
|
|
tprintf("[%16lx] ", rip);
|
|
# elif defined(IA64)
|
|
long ip;
|
|
|
|
if (upeek(tcp, PT_B0, &ip) < 0) {
|
|
PRINTBADPC;
|
|
return;
|
|
}
|
|
tprintf("[%08lx] ", ip);
|
|
# elif defined(POWERPC)
|
|
long pc;
|
|
|
|
if (upeek(tcp, sizeof(unsigned long)*PT_NIP, &pc) < 0) {
|
|
PRINTBADPC;
|
|
return;
|
|
}
|
|
# ifdef POWERPC64
|
|
tprintf("[%016lx] ", pc);
|
|
# else
|
|
tprintf("[%08lx] ", pc);
|
|
# endif
|
|
# elif defined(M68K)
|
|
long pc;
|
|
|
|
if (upeek(tcp, 4*PT_PC, &pc) < 0) {
|
|
tprints("[????????] ");
|
|
return;
|
|
}
|
|
tprintf("[%08lx] ", pc);
|
|
# elif defined(ALPHA)
|
|
long pc;
|
|
|
|
if (upeek(tcp, REG_PC, &pc) < 0) {
|
|
tprints("[????????????????] ");
|
|
return;
|
|
}
|
|
tprintf("[%08lx] ", pc);
|
|
# elif defined(SPARC) || defined(SPARC64)
|
|
struct pt_regs regs;
|
|
if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) {
|
|
PRINTBADPC;
|
|
return;
|
|
}
|
|
# if defined(SPARC64)
|
|
tprintf("[%08lx] ", regs.tpc);
|
|
# else
|
|
tprintf("[%08lx] ", regs.pc);
|
|
# endif
|
|
# elif defined(HPPA)
|
|
long pc;
|
|
|
|
if (upeek(tcp, PT_IAOQ0, &pc) < 0) {
|
|
tprints("[????????] ");
|
|
return;
|
|
}
|
|
tprintf("[%08lx] ", pc);
|
|
# elif defined(MIPS)
|
|
long pc;
|
|
|
|
if (upeek(tcp, REG_EPC, &pc) < 0) {
|
|
tprints("[????????] ");
|
|
return;
|
|
}
|
|
tprintf("[%08lx] ", pc);
|
|
# elif defined(SH)
|
|
long pc;
|
|
|
|
if (upeek(tcp, 4*REG_PC, &pc) < 0) {
|
|
tprints("[????????] ");
|
|
return;
|
|
}
|
|
tprintf("[%08lx] ", pc);
|
|
# elif defined(SH64)
|
|
long pc;
|
|
|
|
if (upeek(tcp, REG_PC, &pc) < 0) {
|
|
tprints("[????????????????] ");
|
|
return;
|
|
}
|
|
tprintf("[%08lx] ", pc);
|
|
# elif defined(ARM)
|
|
long pc;
|
|
|
|
if (upeek(tcp, 4*15, &pc) < 0) {
|
|
PRINTBADPC;
|
|
return;
|
|
}
|
|
tprintf("[%08lx] ", pc);
|
|
# elif defined(AVR32)
|
|
long pc;
|
|
|
|
if (upeek(tcp, REG_PC, &pc) < 0) {
|
|
tprints("[????????] ");
|
|
return;
|
|
}
|
|
tprintf("[%08lx] ", pc);
|
|
# elif defined(BFIN)
|
|
long pc;
|
|
|
|
if (upeek(tcp, PT_PC, &pc) < 0) {
|
|
PRINTBADPC;
|
|
return;
|
|
}
|
|
tprintf("[%08lx] ", pc);
|
|
#elif defined(CRISV10)
|
|
long pc;
|
|
|
|
if (upeek(tcp, 4*PT_IRP, &pc) < 0) {
|
|
PRINTBADPC;
|
|
return;
|
|
}
|
|
tprintf("[%08lx] ", pc);
|
|
#elif defined(CRISV32)
|
|
long pc;
|
|
|
|
if (upeek(tcp, 4*PT_ERP, &pc) < 0) {
|
|
PRINTBADPC;
|
|
return;
|
|
}
|
|
tprintf("[%08lx] ", pc);
|
|
# endif /* architecture */
|
|
#endif /* LINUX */
|
|
|
|
#ifdef SUNOS4
|
|
struct regs regs;
|
|
|
|
if (ptrace(PTRACE_GETREGS, tcp->pid, (char *) ®s, 0) < 0) {
|
|
perror("printcall: ptrace(PTRACE_GETREGS, ...)");
|
|
PRINTBADPC;
|
|
return;
|
|
}
|
|
tprintf("[%08x] ", regs.r_o7);
|
|
#endif /* SUNOS4 */
|
|
|
|
#ifdef SVR4
|
|
/* XXX */
|
|
PRINTBADPC;
|
|
#endif
|
|
|
|
#ifdef FREEBSD
|
|
struct reg regs;
|
|
pread(tcp->pfd_reg, ®s, sizeof(regs), 0);
|
|
tprintf("[%08x] ", regs.r_eip);
|
|
#endif /* FREEBSD */
|
|
}
|
|
|
|
|
|
/*
|
|
* These #if's are huge, please indent them correctly.
|
|
* It's easy to get confused otherwise.
|
|
*/
|
|
#ifndef USE_PROCFS
|
|
|
|
# ifdef LINUX
|
|
|
|
# include "syscall.h"
|
|
|
|
# include <sys/syscall.h>
|
|
# ifndef CLONE_PTRACE
|
|
# define CLONE_PTRACE 0x00002000
|
|
# endif
|
|
# ifndef CLONE_VFORK
|
|
# define CLONE_VFORK 0x00004000
|
|
# endif
|
|
# ifndef CLONE_VM
|
|
# define CLONE_VM 0x00000100
|
|
# endif
|
|
# ifndef CLONE_STOPPED
|
|
# define CLONE_STOPPED 0x02000000
|
|
# endif
|
|
|
|
# ifdef IA64
|
|
|
|
/* We don't have fork()/vfork() syscalls on ia64 itself, but the ia32
|
|
subsystem has them for x86... */
|
|
# define SYS_fork 2
|
|
# define SYS_vfork 190
|
|
|
|
typedef unsigned long *arg_setup_state;
|
|
|
|
static int
|
|
arg_setup(struct tcb *tcp, arg_setup_state *state)
|
|
{
|
|
unsigned long cfm, sof, sol;
|
|
long bsp;
|
|
|
|
if (ia32) {
|
|
/* Satisfy a false GCC warning. */
|
|
*state = NULL;
|
|
return 0;
|
|
}
|
|
|
|
if (upeek(tcp, PT_AR_BSP, &bsp) < 0)
|
|
return -1;
|
|
if (upeek(tcp, PT_CFM, (long *) &cfm) < 0)
|
|
return -1;
|
|
|
|
sof = (cfm >> 0) & 0x7f;
|
|
sol = (cfm >> 7) & 0x7f;
|
|
bsp = (long) ia64_rse_skip_regs((unsigned long *) bsp, -sof + sol);
|
|
|
|
*state = (unsigned long *) bsp;
|
|
return 0;
|
|
}
|
|
|
|
# define arg_finish_change(tcp, state) 0
|
|
|
|
# ifdef SYS_fork
|
|
static int
|
|
get_arg0(struct tcb *tcp, arg_setup_state *state, long *valp)
|
|
{
|
|
int ret;
|
|
|
|
if (ia32)
|
|
ret = upeek(tcp, PT_R11, valp);
|
|
else
|
|
ret = umoven(tcp,
|
|
(unsigned long) ia64_rse_skip_regs(*state, 0),
|
|
sizeof(long), (void *) valp);
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
get_arg1(struct tcb *tcp, arg_setup_state *state, long *valp)
|
|
{
|
|
int ret;
|
|
|
|
if (ia32)
|
|
ret = upeek(tcp, PT_R9, valp);
|
|
else
|
|
ret = umoven(tcp,
|
|
(unsigned long) ia64_rse_skip_regs(*state, 1),
|
|
sizeof(long), (void *) valp);
|
|
return ret;
|
|
}
|
|
# endif
|
|
|
|
static int
|
|
set_arg0(struct tcb *tcp, arg_setup_state *state, long val)
|
|
{
|
|
int req = PTRACE_POKEDATA;
|
|
void *ap;
|
|
|
|
if (ia32) {
|
|
ap = (void *) (intptr_t) PT_R11; /* r11 == EBX */
|
|
req = PTRACE_POKEUSER;
|
|
} else
|
|
ap = ia64_rse_skip_regs(*state, 0);
|
|
errno = 0;
|
|
ptrace(req, tcp->pid, ap, val);
|
|
return errno ? -1 : 0;
|
|
}
|
|
|
|
static int
|
|
set_arg1(struct tcb *tcp, arg_setup_state *state, long val)
|
|
{
|
|
int req = PTRACE_POKEDATA;
|
|
void *ap;
|
|
|
|
if (ia32) {
|
|
ap = (void *) (intptr_t) PT_R9; /* r9 == ECX */
|
|
req = PTRACE_POKEUSER;
|
|
} else
|
|
ap = ia64_rse_skip_regs(*state, 1);
|
|
errno = 0;
|
|
ptrace(req, tcp->pid, ap, val);
|
|
return errno ? -1 : 0;
|
|
}
|
|
|
|
/* ia64 does not return the input arguments from functions (and syscalls)
|
|
according to ia64 RSE (Register Stack Engine) behavior. */
|
|
|
|
# define restore_arg0(tcp, state, val) ((void) (state), 0)
|
|
# define restore_arg1(tcp, state, val) ((void) (state), 0)
|
|
|
|
# elif defined (SPARC) || defined (SPARC64)
|
|
|
|
typedef struct pt_regs arg_setup_state;
|
|
|
|
# define arg_setup(tcp, state) \
|
|
(ptrace(PTRACE_GETREGS, tcp->pid, (char *) (state), 0))
|
|
# define arg_finish_change(tcp, state) \
|
|
(ptrace(PTRACE_SETREGS, tcp->pid, (char *) (state), 0))
|
|
|
|
# define get_arg0(tcp, state, valp) (*(valp) = (state)->u_regs[U_REG_O0], 0)
|
|
# define get_arg1(tcp, state, valp) (*(valp) = (state)->u_regs[U_REG_O1], 0)
|
|
# define set_arg0(tcp, state, val) ((state)->u_regs[U_REG_O0] = (val), 0)
|
|
# define set_arg1(tcp, state, val) ((state)->u_regs[U_REG_O1] = (val), 0)
|
|
# define restore_arg0(tcp, state, val) 0
|
|
|
|
# else /* other architectures */
|
|
|
|
# if defined S390 || defined S390X
|
|
/* Note: this is only true for the `clone' system call, which handles
|
|
arguments specially. We could as well say that its first two arguments
|
|
are swapped relative to other architectures, but that would just be
|
|
another #ifdef in the calls. */
|
|
# define arg0_offset PT_GPR3
|
|
# define arg1_offset PT_ORIGGPR2
|
|
# define restore_arg0(tcp, state, val) ((void) (state), 0)
|
|
# define restore_arg1(tcp, state, val) ((void) (state), 0)
|
|
# define arg0_index 1
|
|
# define arg1_index 0
|
|
# elif defined (ALPHA) || defined (MIPS)
|
|
# define arg0_offset REG_A0
|
|
# define arg1_offset (REG_A0+1)
|
|
# elif defined (AVR32)
|
|
# define arg0_offset (REG_R12)
|
|
# define arg1_offset (REG_R11)
|
|
# elif defined (POWERPC)
|
|
# define arg0_offset (sizeof(unsigned long)*PT_R3)
|
|
# define arg1_offset (sizeof(unsigned long)*PT_R4)
|
|
# define restore_arg0(tcp, state, val) ((void) (state), 0)
|
|
# elif defined (HPPA)
|
|
# define arg0_offset PT_GR26
|
|
# define arg1_offset (PT_GR26-4)
|
|
# elif defined (X86_64)
|
|
# define arg0_offset ((long)(8*(current_personality ? RBX : RDI)))
|
|
# define arg1_offset ((long)(8*(current_personality ? RCX : RSI)))
|
|
# elif defined (SH)
|
|
# define arg0_offset (4*(REG_REG0+4))
|
|
# define arg1_offset (4*(REG_REG0+5))
|
|
# elif defined (SH64)
|
|
/* ABI defines arg0 & 1 in r2 & r3 */
|
|
# define arg0_offset (REG_OFFSET+16)
|
|
# define arg1_offset (REG_OFFSET+24)
|
|
# define restore_arg0(tcp, state, val) 0
|
|
# elif defined CRISV10 || defined CRISV32
|
|
# define arg0_offset (4*PT_R11)
|
|
# define arg1_offset (4*PT_ORIG_R10)
|
|
# define restore_arg0(tcp, state, val) 0
|
|
# define restore_arg1(tcp, state, val) 0
|
|
# define arg0_index 1
|
|
# define arg1_index 0
|
|
# else
|
|
# define arg0_offset 0
|
|
# define arg1_offset 4
|
|
# if defined ARM
|
|
# define restore_arg0(tcp, state, val) 0
|
|
# endif
|
|
# endif
|
|
|
|
typedef int arg_setup_state;
|
|
|
|
# define arg_setup(tcp, state) (0)
|
|
# define arg_finish_change(tcp, state) 0
|
|
# define get_arg0(tcp, cookie, valp) \
|
|
(upeek((tcp), arg0_offset, (valp)))
|
|
# define get_arg1(tcp, cookie, valp) \
|
|
(upeek((tcp), arg1_offset, (valp)))
|
|
|
|
static int
|
|
set_arg0(struct tcb *tcp, void *cookie, long val)
|
|
{
|
|
return ptrace(PTRACE_POKEUSER, tcp->pid, (char*)arg0_offset, val);
|
|
}
|
|
|
|
static int
|
|
set_arg1(struct tcb *tcp, void *cookie, long val)
|
|
{
|
|
return ptrace(PTRACE_POKEUSER, tcp->pid, (char*)arg1_offset, val);
|
|
}
|
|
|
|
# endif /* architectures */
|
|
|
|
# ifndef restore_arg0
|
|
# define restore_arg0(tcp, state, val) set_arg0((tcp), (state), (val))
|
|
# endif
|
|
# ifndef restore_arg1
|
|
# define restore_arg1(tcp, state, val) set_arg1((tcp), (state), (val))
|
|
# endif
|
|
|
|
# ifndef arg0_index
|
|
# define arg0_index 0
|
|
# define arg1_index 1
|
|
# endif
|
|
|
|
int
|
|
setbpt(struct tcb *tcp)
|
|
{
|
|
static int clone_scno[SUPPORTED_PERSONALITIES] = { SYS_clone };
|
|
arg_setup_state state;
|
|
|
|
if (tcp->flags & TCB_BPTSET) {
|
|
fprintf(stderr, "PANIC: TCB already set in pid %u\n", tcp->pid);
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* It's a silly kludge to initialize this with a search at runtime.
|
|
* But it's better than maintaining another magic thing in the
|
|
* godforsaken tables.
|
|
*/
|
|
if (clone_scno[current_personality] == 0) {
|
|
int i;
|
|
for (i = 0; i < nsyscalls; ++i)
|
|
if (sysent[i].sys_func == sys_clone) {
|
|
clone_scno[current_personality] = i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
switch (known_scno(tcp)) {
|
|
# ifdef SYS_vfork
|
|
case SYS_vfork:
|
|
# endif
|
|
# ifdef SYS_fork
|
|
case SYS_fork:
|
|
# endif
|
|
# if defined SYS_fork || defined SYS_vfork
|
|
if (arg_setup(tcp, &state) < 0
|
|
|| get_arg0(tcp, &state, &tcp->inst[0]) < 0
|
|
|| get_arg1(tcp, &state, &tcp->inst[1]) < 0
|
|
|| change_syscall(tcp, clone_scno[current_personality]) < 0
|
|
|| set_arg0(tcp, &state, CLONE_PTRACE|SIGCHLD) < 0
|
|
|| set_arg1(tcp, &state, 0) < 0
|
|
|| arg_finish_change(tcp, &state) < 0)
|
|
return -1;
|
|
tcp->u_arg[arg0_index] = CLONE_PTRACE|SIGCHLD;
|
|
tcp->u_arg[arg1_index] = 0;
|
|
tcp->flags |= TCB_BPTSET;
|
|
return 0;
|
|
# endif
|
|
|
|
case SYS_clone: ;
|
|
# ifdef SYS_clone2
|
|
case SYS_clone2: ;
|
|
# endif
|
|
/* ia64 calls directly `clone (CLONE_VFORK | CLONE_VM)'
|
|
contrary to x86 SYS_vfork above. Even on x86 we turn the
|
|
vfork semantics into plain fork - each application must not
|
|
depend on the vfork specifics according to POSIX. We would
|
|
hang waiting for the parent resume otherwise. We need to
|
|
clear also CLONE_VM but only in the CLONE_VFORK case as
|
|
otherwise we would break pthread_create. */
|
|
|
|
long new_arg0 = (tcp->u_arg[arg0_index] | CLONE_PTRACE);
|
|
if (new_arg0 & CLONE_VFORK)
|
|
new_arg0 &= ~(unsigned long)(CLONE_VFORK | CLONE_VM);
|
|
if (arg_setup(tcp, &state) < 0
|
|
|| set_arg0(tcp, &state, new_arg0) < 0
|
|
|| arg_finish_change(tcp, &state) < 0)
|
|
return -1;
|
|
tcp->flags |= TCB_BPTSET;
|
|
tcp->inst[0] = tcp->u_arg[arg0_index];
|
|
tcp->inst[1] = tcp->u_arg[arg1_index];
|
|
return 0;
|
|
|
|
default:
|
|
fprintf(stderr, "PANIC: setbpt for syscall %ld on %u???\n",
|
|
tcp->scno, tcp->pid);
|
|
break;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
clearbpt(struct tcb *tcp)
|
|
{
|
|
arg_setup_state state;
|
|
if (arg_setup(tcp, &state) < 0
|
|
|| restore_arg0(tcp, &state, tcp->inst[0]) < 0
|
|
|| restore_arg1(tcp, &state, tcp->inst[1]) < 0
|
|
|| arg_finish_change(tcp, &state))
|
|
if (errno != ESRCH)
|
|
return -1;
|
|
tcp->flags &= ~TCB_BPTSET;
|
|
return 0;
|
|
}
|
|
|
|
# else /* !defined LINUX */
|
|
|
|
int
|
|
setbpt(struct tcb *tcp)
|
|
{
|
|
# ifdef SUNOS4
|
|
# ifdef SPARC /* This code is slightly sparc specific */
|
|
|
|
struct regs regs;
|
|
# define BPT 0x91d02001 /* ta 1 */
|
|
# define LOOP 0x10800000 /* ba 0 */
|
|
# define LOOPA 0x30800000 /* ba,a 0 */
|
|
# define NOP 0x01000000
|
|
# if LOOPA
|
|
static int loopdeloop[1] = {LOOPA};
|
|
# else
|
|
static int loopdeloop[2] = {LOOP, NOP};
|
|
# endif
|
|
|
|
if (tcp->flags & TCB_BPTSET) {
|
|
fprintf(stderr, "PANIC: TCB already set in pid %u\n", tcp->pid);
|
|
return -1;
|
|
}
|
|
if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) {
|
|
perror("setbpt: ptrace(PTRACE_GETREGS, ...)");
|
|
return -1;
|
|
}
|
|
tcp->baddr = regs.r_o7 + 8;
|
|
if (ptrace(PTRACE_READTEXT, tcp->pid, (char *)tcp->baddr,
|
|
sizeof tcp->inst, (char *)tcp->inst) < 0) {
|
|
perror("setbpt: ptrace(PTRACE_READTEXT, ...)");
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* XXX - BRUTAL MODE ON
|
|
* We cannot set a real BPT in the child, since it will not be
|
|
* traced at the moment it will reach the trap and would probably
|
|
* die with a core dump.
|
|
* Thus, we are force our way in by taking out two instructions
|
|
* and insert an eternal loop in stead, in expectance of the SIGSTOP
|
|
* generated by out PTRACE_ATTACH.
|
|
* Of cause, if we evaporate ourselves in the middle of all this...
|
|
*/
|
|
if (ptrace(PTRACE_WRITETEXT, tcp->pid, (char *) tcp->baddr,
|
|
sizeof loopdeloop, (char *) loopdeloop) < 0) {
|
|
perror("setbpt: ptrace(PTRACE_WRITETEXT, ...)");
|
|
return -1;
|
|
}
|
|
tcp->flags |= TCB_BPTSET;
|
|
|
|
# endif /* SPARC */
|
|
# endif /* SUNOS4 */
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
clearbpt(struct tcb *tcp)
|
|
{
|
|
# ifdef SUNOS4
|
|
# ifdef SPARC
|
|
|
|
# if !LOOPA
|
|
struct regs regs;
|
|
# endif
|
|
|
|
if (!(tcp->flags & TCB_BPTSET)) {
|
|
fprintf(stderr, "PANIC: TCB not set in pid %u\n", tcp->pid);
|
|
return -1;
|
|
}
|
|
if (ptrace(PTRACE_WRITETEXT, tcp->pid, (char *) tcp->baddr,
|
|
sizeof tcp->inst, (char *) tcp->inst) < 0) {
|
|
perror("clearbtp: ptrace(PTRACE_WRITETEXT, ...)");
|
|
return -1;
|
|
}
|
|
tcp->flags &= ~TCB_BPTSET;
|
|
|
|
# if !LOOPA
|
|
/*
|
|
* Since we don't have a single instruction breakpoint, we may have
|
|
* to adjust the program counter after removing our `breakpoint'.
|
|
*/
|
|
if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) {
|
|
perror("clearbpt: ptrace(PTRACE_GETREGS, ...)");
|
|
return -1;
|
|
}
|
|
if ((regs.r_pc < tcp->baddr) ||
|
|
(regs.r_pc > tcp->baddr + 4)) {
|
|
/* The breakpoint has not been reached yet */
|
|
if (debug)
|
|
fprintf(stderr,
|
|
"NOTE: PC not at bpt (pc %#x baddr %#x)\n",
|
|
regs.r_pc, tcp->baddr);
|
|
return 0;
|
|
}
|
|
if (regs.r_pc != tcp->baddr)
|
|
if (debug)
|
|
fprintf(stderr, "NOTE: PC adjusted (%#x -> %#x\n",
|
|
regs.r_pc, tcp->baddr);
|
|
|
|
regs.r_pc = tcp->baddr;
|
|
if (ptrace(PTRACE_SETREGS, tcp->pid, (char *)®s, 0) < 0) {
|
|
perror("clearbpt: ptrace(PTRACE_SETREGS, ...)");
|
|
return -1;
|
|
}
|
|
# endif /* LOOPA */
|
|
# endif /* SPARC */
|
|
# endif /* SUNOS4 */
|
|
|
|
return 0;
|
|
}
|
|
|
|
# endif /* !defined LINUX */
|
|
|
|
#endif /* !USE_PROCFS */
|
|
|
|
|
|
#ifdef SUNOS4
|
|
|
|
static int
|
|
getex(struct tcb *tcp, struct exec *hdr)
|
|
{
|
|
int n;
|
|
|
|
for (n = 0; n < sizeof *hdr; n += 4) {
|
|
long res;
|
|
if (upeek(tcp, uoff(u_exdata) + n, &res) < 0)
|
|
return -1;
|
|
memcpy(((char *) hdr) + n, &res, 4);
|
|
}
|
|
if (debug) {
|
|
fprintf(stderr, "[struct exec: magic: %o version %u Mach %o\n",
|
|
hdr->a_magic, hdr->a_toolversion, hdr->a_machtype);
|
|
fprintf(stderr, "Text %lu Data %lu Bss %lu Syms %lu Entry %#lx]\n",
|
|
hdr->a_text, hdr->a_data, hdr->a_bss, hdr->a_syms, hdr->a_entry);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
fixvfork(struct tcb *tcp)
|
|
{
|
|
int pid = tcp->pid;
|
|
/*
|
|
* Change `vfork' in a freshly exec'ed dynamically linked
|
|
* executable's (internal) symbol table to plain old `fork'
|
|
*/
|
|
|
|
struct exec hdr;
|
|
struct link_dynamic dyn;
|
|
struct link_dynamic_2 ld;
|
|
char *strtab, *cp;
|
|
|
|
if (getex(tcp, &hdr) < 0)
|
|
return -1;
|
|
if (!hdr.a_dynamic)
|
|
return -1;
|
|
|
|
if (umove(tcp, (int) N_DATADDR(hdr), &dyn) < 0) {
|
|
fprintf(stderr, "Cannot read DYNAMIC\n");
|
|
return -1;
|
|
}
|
|
if (umove(tcp, (int) dyn.ld_un.ld_2, &ld) < 0) {
|
|
fprintf(stderr, "Cannot read link_dynamic_2\n");
|
|
return -1;
|
|
}
|
|
strtab = malloc((unsigned)ld.ld_symb_size);
|
|
if (!strtab)
|
|
die_out_of_memory();
|
|
if (umoven(tcp, (int)ld.ld_symbols+(int)N_TXTADDR(hdr),
|
|
(int)ld.ld_symb_size, strtab) < 0)
|
|
goto err;
|
|
|
|
for (cp = strtab; cp < strtab + ld.ld_symb_size; ) {
|
|
if (strcmp(cp, "_vfork") == 0) {
|
|
if (debug)
|
|
fprintf(stderr, "fixvfork: FOUND _vfork\n");
|
|
strcpy(cp, "_fork");
|
|
break;
|
|
}
|
|
cp += strlen(cp)+1;
|
|
}
|
|
if (cp < strtab + ld.ld_symb_size)
|
|
/*
|
|
* Write entire symbol table back to avoid
|
|
* memory alignment bugs in ptrace
|
|
*/
|
|
if (tload(pid, (int)ld.ld_symbols+(int)N_TXTADDR(hdr),
|
|
(int)ld.ld_symb_size, strtab) < 0)
|
|
goto err;
|
|
|
|
free(strtab);
|
|
return 0;
|
|
|
|
err:
|
|
free(strtab);
|
|
return -1;
|
|
}
|
|
|
|
#endif /* SUNOS4 */
|