6303f35779
This is a 64bit arch w/no personalities, so fix printing. It can now trace a simple call like readahead: $ cat test.c main(){readahead(-1, (unsigned long long)1 << 50, 0);} $ gcc test.c $ ./strace -ereadahead ./a.out readahead(-1, 1125899906842624, 0) = -1 EBADF (Bad file descriptor) * util.c (printllval): Handle S390X define. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
1496 lines
36 KiB
C
1496 lines
36 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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#include "defs.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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|
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#if 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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|
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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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|
|
|
/* 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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string_to_uint(const char *str)
|
|
{
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char *error;
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long value;
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|
|
|
if (!*str)
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return -1;
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errno = 0;
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value = strtol(str, &error, 10);
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if (errno || *error || value < 0 || (long)(int)value != value)
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return -1;
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return (int)value;
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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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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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|
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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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|
|
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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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|
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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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* 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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/*
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* Print 64bit argument at position arg_no 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 arg_no)
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{
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#if defined(X86_64) || defined(POWERPC64) || defined(TILE) || defined(AARCH64)
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if (current_personality == 0) {
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/* Technically, format expects "long long",
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* but we supply "long". We expect that
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* on this arch, they are the same.
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*/
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tprintf(format, tcp->u_arg[arg_no]);
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arg_no++;
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} else {
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# if defined(POWERPC64)
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/* Align arg_no to next even number */
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arg_no = (arg_no + 1) & 0xe;
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# endif
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tprintf(format, LONG_LONG(tcp->u_arg[arg_no], tcp->u_arg[arg_no + 1]));
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arg_no += 2;
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}
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#elif defined IA64 || defined ALPHA || defined S390X
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/* Technically, format expects "long long",
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* but we supply "long". We expect that
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* on this arch, they are the same.
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*/
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tprintf(format, tcp->u_arg[arg_no]);
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arg_no++;
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#elif defined LINUX_MIPSN32 || defined X32
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tprintf(format, tcp->ext_arg[arg_no]);
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arg_no++;
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|
#else
|
|
# if SIZEOF_LONG > 4
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|
# error BUG: must not combine two args for long long on this arch
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|
# endif
|
|
tprintf(format, LONG_LONG(tcp->u_arg[arg_no], tcp->u_arg[arg_no + 1]));
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|
arg_no += 2;
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|
#endif
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return arg_no;
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|
}
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|
|
|
/*
|
|
* Interpret `xlat' as an array of flags
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|
* 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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|
for (; xlat->str; xlat++) {
|
|
if (xlat->val && (flags & xlat->val) == xlat->val) {
|
|
tprintf("|%s", xlat->str);
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|
flags &= ~xlat->val;
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|
}
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|
}
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|
if (flags) {
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tprintf("|%#x", flags);
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|
}
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|
}
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|
|
|
/*
|
|
* Interpret `xlat' as an array of flags.
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|
* Print to static string the entries whose bits are on in `flags'
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|
* Return static string.
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|
*/
|
|
const char *
|
|
sprintflags(const char *prefix, const struct xlat *xlat, int flags)
|
|
{
|
|
static char outstr[1024];
|
|
char *outptr;
|
|
int found = 0;
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|
|
|
outptr = stpcpy(outstr, prefix);
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|
|
|
for (; xlat->str; xlat++) {
|
|
if ((flags & xlat->val) == xlat->val) {
|
|
if (found)
|
|
*outptr++ = '|';
|
|
outptr = stpcpy(outptr, xlat->str);
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|
found = 1;
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|
flags &= ~xlat->val;
|
|
if (!flags)
|
|
break;
|
|
}
|
|
}
|
|
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);
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|
return 1;
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|
}
|
|
|
|
sep = "";
|
|
for (n = 0; xlat->str; xlat++) {
|
|
if (xlat->val && (flags & xlat->val) == xlat->val) {
|
|
tprintf("%s%s", sep, xlat->str);
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|
flags &= ~xlat->val;
|
|
sep = "|";
|
|
n++;
|
|
}
|
|
}
|
|
|
|
if (n) {
|
|
if (flags) {
|
|
tprintf("%s%#x", sep, flags);
|
|
n++;
|
|
}
|
|
} else {
|
|
if (flags) {
|
|
tprintf("%#x", flags);
|
|
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)
|
|
{
|
|
char path[PATH_MAX + 1];
|
|
|
|
if (show_fd_path && getfdpath(tcp, fd, path, sizeof(path)) >= 0)
|
|
tprintf("%d<%s>", fd, path);
|
|
else
|
|
tprintf("%d", fd);
|
|
}
|
|
|
|
void
|
|
printuid(const char *text, unsigned long uid)
|
|
{
|
|
tprintf((uid == -1) ? "%s%ld" : "%s%lu", text, uid);
|
|
}
|
|
|
|
/*
|
|
* Quote string `instr' of length `size'
|
|
* Write up to (3 + `size' * 4) bytes to `outstr' buffer.
|
|
* If `len' is -1, treat `instr' as a NUL-terminated string
|
|
* and quote at most (`size' - 1) bytes.
|
|
*
|
|
* Returns 0 if len == -1 and NUL was seen, 1 otherwise.
|
|
* Note that if len >= 0, always returns 1.
|
|
*/
|
|
int
|
|
string_quote(const char *instr, char *outstr, long 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 == -1) {
|
|
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;
|
|
|
|
/* Force hex unless c is printable or whitespace */
|
|
if (c > 0x7e) {
|
|
usehex = 1;
|
|
break;
|
|
}
|
|
/* In ASCII isspace is only these chars: "\t\n\v\f\r".
|
|
* They happen to have ASCII codes 9,10,11,12,13.
|
|
*/
|
|
if (c < ' ' && (unsigned)(c - 9) >= 5) {
|
|
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 (c >= ' ' && c <= 0x7e)
|
|
*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 == -1 && 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)
|
|
{
|
|
char path[MAXPATHLEN + 1];
|
|
int nul_seen;
|
|
|
|
if (!addr) {
|
|
tprints("NULL");
|
|
return;
|
|
}
|
|
|
|
/* Cap path length to the path buffer size */
|
|
if (n > sizeof path - 1)
|
|
n = sizeof path - 1;
|
|
|
|
/* Fetch one byte more to find out whether path length > n. */
|
|
nul_seen = umovestr(tcp, addr, n + 1, path);
|
|
if (nul_seen < 0)
|
|
tprintf("%#lx", addr);
|
|
else {
|
|
char *outstr;
|
|
|
|
path[n] = '\0';
|
|
n++;
|
|
outstr = alloca(4 * n); /* 4*(n-1) + 3 for quotes and NUL */
|
|
string_quote(path, outstr, -1, n);
|
|
tprints(outstr);
|
|
if (!nul_seen)
|
|
tprints("...");
|
|
}
|
|
}
|
|
|
|
void
|
|
printpath(struct tcb *tcp, long addr)
|
|
{
|
|
/* Size must correspond to char path[] size in printpathn */
|
|
printpathn(tcp, addr, MAXPATHLEN);
|
|
}
|
|
|
|
/*
|
|
* 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, long len)
|
|
{
|
|
static char *str = NULL;
|
|
static char *outstr;
|
|
int size;
|
|
int ellipsis;
|
|
|
|
if (!addr) {
|
|
tprints("NULL");
|
|
return;
|
|
}
|
|
/* Allocate static buffers if they are not allocated yet. */
|
|
if (!str) {
|
|
unsigned int outstr_size = 4 * max_strlen + /*for quotes and NUL:*/ 3;
|
|
|
|
if (outstr_size / 4 != max_strlen)
|
|
die_out_of_memory();
|
|
str = malloc(max_strlen + 1);
|
|
if (!str)
|
|
die_out_of_memory();
|
|
outstr = malloc(outstr_size);
|
|
if (!outstr)
|
|
die_out_of_memory();
|
|
}
|
|
|
|
if (len == -1) {
|
|
/*
|
|
* Treat as a NUL-terminated string: fetch one byte more
|
|
* because string_quote() quotes one byte less.
|
|
*/
|
|
size = max_strlen + 1;
|
|
if (umovestr(tcp, addr, size, str) < 0) {
|
|
tprintf("%#lx", addr);
|
|
return;
|
|
}
|
|
}
|
|
else {
|
|
size = max_strlen;
|
|
if (size > (unsigned long)len)
|
|
size = (unsigned long)len;
|
|
if (umoven(tcp, addr, size, str) < 0) {
|
|
tprintf("%#lx", addr);
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* If string_quote didn't see NUL and (it was supposed to be ASCIZ str
|
|
* or we were requested to print more than -s NUM chars)...
|
|
*/
|
|
ellipsis = (string_quote(str, outstr, len, size) &&
|
|
(len < 0 || len > max_strlen));
|
|
|
|
tprints(outstr);
|
|
if (ellipsis)
|
|
tprints("...");
|
|
}
|
|
|
|
#if HAVE_SYS_UIO_H
|
|
void
|
|
dumpiov(struct tcb *tcp, int len, long addr)
|
|
{
|
|
#if SUPPORTED_PERSONALITIES > 1
|
|
union {
|
|
struct { u_int32_t base; u_int32_t len; } *iov32;
|
|
struct { u_int64_t base; u_int64_t len; } *iov64;
|
|
} iovu;
|
|
#define iov iovu.iov64
|
|
#define sizeof_iov \
|
|
(current_wordsize == 4 ? sizeof(*iovu.iov32) : sizeof(*iovu.iov64))
|
|
#define iov_iov_base(i) \
|
|
(current_wordsize == 4 ? (uint64_t) iovu.iov32[i].base : iovu.iov64[i].base)
|
|
#define iov_iov_len(i) \
|
|
(current_wordsize == 4 ? (uint64_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 outbuf[
|
|
(
|
|
(sizeof(
|
|
"xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx "
|
|
"1234567890123456") + /*in case I'm off by few:*/ 4)
|
|
/*align to 8 to make memset easier:*/ + 7) & -8
|
|
];
|
|
const unsigned char *src;
|
|
int i;
|
|
|
|
memset(outbuf, ' ', sizeof(outbuf));
|
|
|
|
if (strsize < len + 16) {
|
|
free(str);
|
|
str = malloc(len + 16);
|
|
if (!str) {
|
|
strsize = -1;
|
|
fprintf(stderr, "Out of memory\n");
|
|
return;
|
|
}
|
|
strsize = len + 16;
|
|
}
|
|
|
|
if (umoven(tcp, addr, len, (char *) str) < 0)
|
|
return;
|
|
|
|
/* Space-pad to 16 bytes */
|
|
i = len;
|
|
while (i & 0xf)
|
|
str[i++] = ' ';
|
|
|
|
i = 0;
|
|
src = str;
|
|
while (i < len) {
|
|
char *dst = outbuf;
|
|
/* Hex dump */
|
|
do {
|
|
if (i < len) {
|
|
*dst++ = "0123456789abcdef"[*src >> 4];
|
|
*dst++ = "0123456789abcdef"[*src & 0xf];
|
|
}
|
|
else {
|
|
*dst++ = ' ';
|
|
*dst++ = ' ';
|
|
}
|
|
dst++; /* space is there by memset */
|
|
i++;
|
|
if ((i & 7) == 0)
|
|
dst++; /* space is there by memset */
|
|
src++;
|
|
} while (i & 0xf);
|
|
/* ASCII dump */
|
|
i -= 16;
|
|
src -= 16;
|
|
do {
|
|
if (*src >= ' ' && *src < 0x7f)
|
|
*dst++ = *src;
|
|
else
|
|
*dst++ = '.';
|
|
src++;
|
|
} while (++i & 0xf);
|
|
*dst = '\0';
|
|
tprintf(" | %05x %s |\n", i - 16, outbuf);
|
|
}
|
|
}
|
|
|
|
#ifdef HAVE_PROCESS_VM_READV
|
|
/* C library supports this, but the kernel might not. */
|
|
static bool process_vm_readv_not_supported = 0;
|
|
#else
|
|
|
|
/* Need to do this since process_vm_readv() is not yet available in libc.
|
|
* When libc is be updated, only "static bool process_vm_readv_not_supported"
|
|
* line should remain.
|
|
*/
|
|
#if !defined(__NR_process_vm_readv)
|
|
# if defined(I386)
|
|
# define __NR_process_vm_readv 347
|
|
# elif defined(X86_64)
|
|
# define __NR_process_vm_readv 310
|
|
# elif defined(POWERPC)
|
|
# define __NR_process_vm_readv 351
|
|
# endif
|
|
#endif
|
|
|
|
#if defined(__NR_process_vm_readv)
|
|
static bool process_vm_readv_not_supported = 0;
|
|
/* Have to avoid duplicating with the C library headers. */
|
|
static ssize_t strace_process_vm_readv(pid_t pid,
|
|
const struct iovec *lvec,
|
|
unsigned long liovcnt,
|
|
const struct iovec *rvec,
|
|
unsigned long riovcnt,
|
|
unsigned long flags)
|
|
{
|
|
return syscall(__NR_process_vm_readv, (long)pid, lvec, liovcnt, rvec, riovcnt, flags);
|
|
}
|
|
#define process_vm_readv strace_process_vm_readv
|
|
#else
|
|
static bool process_vm_readv_not_supported = 1;
|
|
# define process_vm_readv(...) (errno = ENOSYS, -1)
|
|
#endif
|
|
|
|
#endif /* end of hack */
|
|
|
|
#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)
|
|
{
|
|
int pid = tcp->pid;
|
|
int n, m, nread;
|
|
union {
|
|
long val;
|
|
char x[sizeof(long)];
|
|
} u;
|
|
|
|
#if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
|
|
if (current_wordsize < sizeof(addr))
|
|
addr &= (1ul << 8 * current_wordsize) - 1;
|
|
#endif
|
|
|
|
if (!process_vm_readv_not_supported) {
|
|
struct iovec local[1], remote[1];
|
|
int r;
|
|
|
|
local[0].iov_base = laddr;
|
|
remote[0].iov_base = (void*)addr;
|
|
local[0].iov_len = remote[0].iov_len = len;
|
|
r = process_vm_readv(pid, local, 1, remote, 1, 0);
|
|
if (r == len)
|
|
return 0;
|
|
if (r >= 0) {
|
|
error_msg("umoven: short read (%d < %d) @0x%lx",
|
|
r, len, addr);
|
|
return -1;
|
|
}
|
|
switch (errno) {
|
|
case ENOSYS:
|
|
process_vm_readv_not_supported = 1;
|
|
break;
|
|
case ESRCH:
|
|
/* the process is gone */
|
|
return -1;
|
|
case EFAULT: case EIO: case EPERM:
|
|
/* address space is inaccessible */
|
|
return -1;
|
|
default:
|
|
/* all the rest is strange and should be reported */
|
|
perror_msg("process_vm_readv");
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
nread = 0;
|
|
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);
|
|
switch (errno) {
|
|
case 0:
|
|
break;
|
|
case ESRCH: case EINVAL:
|
|
/* these could be seen if the process is gone */
|
|
return -1;
|
|
case EFAULT: case EIO: case EPERM:
|
|
/* address space is inaccessible */
|
|
return -1;
|
|
default:
|
|
/* all the rest is strange and should be reported */
|
|
perror_msg("umoven: PTRACE_PEEKDATA pid:%d @0x%lx",
|
|
pid, addr);
|
|
return -1;
|
|
}
|
|
m = MIN(sizeof(long) - n, len);
|
|
memcpy(laddr, &u.x[n], m);
|
|
addr += sizeof(long);
|
|
laddr += m;
|
|
nread += m;
|
|
len -= m;
|
|
}
|
|
while (len) {
|
|
errno = 0;
|
|
u.val = ptrace(PTRACE_PEEKDATA, pid, (char *) addr, 0);
|
|
switch (errno) {
|
|
case 0:
|
|
break;
|
|
case ESRCH: case EINVAL:
|
|
/* these could be seen if the process is gone */
|
|
return -1;
|
|
case EFAULT: case EIO: case EPERM:
|
|
/* address space is inaccessible */
|
|
if (nread) {
|
|
perror_msg("umoven: short read (%d < %d) @0x%lx",
|
|
nread, nread + len, addr - nread);
|
|
}
|
|
return -1;
|
|
default:
|
|
/* all the rest is strange and should be reported */
|
|
perror_msg("umoven: PTRACE_PEEKDATA pid:%d @0x%lx",
|
|
pid, addr);
|
|
return -1;
|
|
}
|
|
m = MIN(sizeof(long), len);
|
|
memcpy(laddr, u.x, m);
|
|
addr += sizeof(long);
|
|
laddr += m;
|
|
nread += m;
|
|
len -= m;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Like `umove' but make the additional effort of looking
|
|
* for a terminating zero byte.
|
|
*
|
|
* Returns < 0 on error, > 0 if NUL was seen,
|
|
* (TODO if useful: return count of bytes including NUL),
|
|
* else 0 if len bytes were read but no NUL byte seen.
|
|
*
|
|
* Note: there is no guarantee we won't overwrite some bytes
|
|
* in laddr[] _after_ terminating NUL (but, of course,
|
|
* we never write past laddr[len-1]).
|
|
*/
|
|
int
|
|
umovestr(struct tcb *tcp, long addr, int len, char *laddr)
|
|
{
|
|
#if SIZEOF_LONG == 4
|
|
const unsigned long x01010101 = 0x01010101ul;
|
|
const unsigned long x80808080 = 0x80808080ul;
|
|
#elif SIZEOF_LONG == 8
|
|
const unsigned long x01010101 = 0x0101010101010101ul;
|
|
const unsigned long x80808080 = 0x8080808080808080ul;
|
|
#else
|
|
# error SIZEOF_LONG > 8
|
|
#endif
|
|
|
|
int pid = tcp->pid;
|
|
int n, m, nread;
|
|
union {
|
|
unsigned long val;
|
|
char x[sizeof(long)];
|
|
} u;
|
|
|
|
#if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
|
|
if (current_wordsize < sizeof(addr))
|
|
addr &= (1ul << 8 * current_wordsize) - 1;
|
|
#endif
|
|
|
|
nread = 0;
|
|
if (!process_vm_readv_not_supported) {
|
|
struct iovec local[1], remote[1];
|
|
|
|
local[0].iov_base = laddr;
|
|
remote[0].iov_base = (void*)addr;
|
|
|
|
while (len > 0) {
|
|
int end_in_page;
|
|
int r;
|
|
int chunk_len;
|
|
|
|
/* Don't read kilobytes: most strings are short */
|
|
chunk_len = len;
|
|
if (chunk_len > 256)
|
|
chunk_len = 256;
|
|
/* Don't cross pages. I guess otherwise we can get EFAULT
|
|
* and fail to notice that terminating NUL lies
|
|
* in the existing (first) page.
|
|
* (I hope there aren't arches with pages < 4K)
|
|
*/
|
|
end_in_page = ((addr + chunk_len) & 4095);
|
|
r = chunk_len - end_in_page;
|
|
if (r > 0) /* if chunk_len > end_in_page */
|
|
chunk_len = r; /* chunk_len -= end_in_page */
|
|
|
|
local[0].iov_len = remote[0].iov_len = chunk_len;
|
|
r = process_vm_readv(pid, local, 1, remote, 1, 0);
|
|
if (r > 0) {
|
|
if (memchr(local[0].iov_base, '\0', r))
|
|
return 1;
|
|
local[0].iov_base += r;
|
|
remote[0].iov_base += r;
|
|
len -= r;
|
|
nread += r;
|
|
continue;
|
|
}
|
|
switch (errno) {
|
|
case ENOSYS:
|
|
process_vm_readv_not_supported = 1;
|
|
goto vm_readv_didnt_work;
|
|
case ESRCH:
|
|
/* the process is gone */
|
|
return -1;
|
|
case EFAULT: case EIO: case EPERM:
|
|
/* address space is inaccessible */
|
|
if (nread) {
|
|
perror_msg("umovestr: short read (%d < %d) @0x%lx",
|
|
nread, nread + len, addr);
|
|
}
|
|
return -1;
|
|
default:
|
|
/* all the rest is strange and should be reported */
|
|
perror_msg("process_vm_readv");
|
|
return -1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
vm_readv_didnt_work:
|
|
|
|
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);
|
|
switch (errno) {
|
|
case 0:
|
|
break;
|
|
case ESRCH: case EINVAL:
|
|
/* these could be seen if the process is gone */
|
|
return -1;
|
|
case EFAULT: case EIO: case EPERM:
|
|
/* address space is inaccessible */
|
|
return -1;
|
|
default:
|
|
/* all the rest is strange and should be reported */
|
|
perror_msg("umovestr: PTRACE_PEEKDATA pid:%d @0x%lx",
|
|
pid, addr);
|
|
return -1;
|
|
}
|
|
m = MIN(sizeof(long) - n, len);
|
|
memcpy(laddr, &u.x[n], m);
|
|
while (n & (sizeof(long) - 1))
|
|
if (u.x[n++] == '\0')
|
|
return 1;
|
|
addr += sizeof(long);
|
|
laddr += m;
|
|
nread += m;
|
|
len -= m;
|
|
}
|
|
|
|
while (len) {
|
|
errno = 0;
|
|
u.val = ptrace(PTRACE_PEEKDATA, pid, (char *)addr, 0);
|
|
switch (errno) {
|
|
case 0:
|
|
break;
|
|
case ESRCH: case EINVAL:
|
|
/* these could be seen if the process is gone */
|
|
return -1;
|
|
case EFAULT: case EIO: case EPERM:
|
|
/* address space is inaccessible */
|
|
if (nread) {
|
|
perror_msg("umovestr: short read (%d < %d) @0x%lx",
|
|
nread, nread + len, addr - nread);
|
|
}
|
|
return -1;
|
|
default:
|
|
/* all the rest is strange and should be reported */
|
|
perror_msg("umovestr: PTRACE_PEEKDATA pid:%d @0x%lx",
|
|
pid, addr);
|
|
return -1;
|
|
}
|
|
m = MIN(sizeof(long), len);
|
|
memcpy(laddr, u.x, m);
|
|
/* "If a NUL char exists in this word" */
|
|
if ((u.val - x01010101) & ~u.val & x80808080)
|
|
return 1;
|
|
addr += sizeof(long);
|
|
laddr += m;
|
|
nread += m;
|
|
len -= m;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
upeek(struct tcb *tcp, long off, long *res)
|
|
{
|
|
long val;
|
|
|
|
errno = 0;
|
|
val = ptrace(PTRACE_PEEKUSER, tcp->pid, (char *) off, 0);
|
|
if (val == -1 && errno) {
|
|
if (errno != ESRCH) {
|
|
perror_msg("upeek: PTRACE_PEEKUSER pid:%d @0x%lx)", tcp->pid, off);
|
|
}
|
|
return -1;
|
|
}
|
|
*res = val;
|
|
return 0;
|
|
}
|
|
|
|
/* Note! On new kernels (about 2.5.46+), we use PTRACE_O_TRACECLONE
|
|
* and PTRACE_O_TRACE[V]FORK for tracing children.
|
|
* If you are adding a new arch which is only supported by newer kernels,
|
|
* you most likely don't need to add any code below
|
|
* beside a dummy "return 0" block in change_syscall().
|
|
*/
|
|
|
|
/*
|
|
* These #if's are huge, please indent them correctly.
|
|
* It's easy to get confused otherwise.
|
|
*/
|
|
|
|
#include "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
|
|
|
|
#ifdef IA64
|
|
|
|
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
|
|
|
|
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;
|
|
}
|
|
|
|
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)
|
|
|
|
# if defined(SPARC64)
|
|
# undef PTRACE_GETREGS
|
|
# define PTRACE_GETREGS PTRACE_GETREGS64
|
|
# undef PTRACE_SETREGS
|
|
# define PTRACE_SETREGS PTRACE_SETREGS64
|
|
# endif
|
|
|
|
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(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) || defined(X32)
|
|
# 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
|
|
|
|
static int
|
|
change_syscall(struct tcb *tcp, arg_setup_state *state, int new)
|
|
{
|
|
#if defined(I386)
|
|
if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(ORIG_EAX * 4), new) < 0)
|
|
return -1;
|
|
return 0;
|
|
#elif defined(X86_64)
|
|
if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(ORIG_RAX * 8), new) < 0)
|
|
return -1;
|
|
return 0;
|
|
#elif defined(X32)
|
|
/* setbpt/clearbpt never used: */
|
|
/* X32 is only supported since about linux-3.0.30 */
|
|
#elif defined(POWERPC)
|
|
if (ptrace(PTRACE_POKEUSER, tcp->pid,
|
|
(char*)(sizeof(unsigned long)*PT_R0), new) < 0)
|
|
return -1;
|
|
return 0;
|
|
#elif defined(S390) || defined(S390X)
|
|
/* s390 linux after 2.4.7 has a hook in entry.S to allow this */
|
|
if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_GPR2), new) < 0)
|
|
return -1;
|
|
return 0;
|
|
#elif defined(M68K)
|
|
if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(4*PT_ORIG_D0), new) < 0)
|
|
return -1;
|
|
return 0;
|
|
#elif defined(SPARC) || defined(SPARC64)
|
|
state->u_regs[U_REG_G1] = new;
|
|
return 0;
|
|
#elif defined(MIPS)
|
|
if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_V0), new) < 0)
|
|
return -1;
|
|
return 0;
|
|
#elif defined(ALPHA)
|
|
if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_A3), new) < 0)
|
|
return -1;
|
|
return 0;
|
|
#elif defined(AVR32)
|
|
/* setbpt/clearbpt never used: */
|
|
/* AVR32 is only supported since about linux-2.6.19 */
|
|
#elif defined(BFIN)
|
|
/* setbpt/clearbpt never used: */
|
|
/* Blackfin is only supported since about linux-2.6.23 */
|
|
#elif defined(IA64)
|
|
if (ia32) {
|
|
switch (new) {
|
|
case 2:
|
|
break; /* x86 SYS_fork */
|
|
case SYS_clone:
|
|
new = 120;
|
|
break;
|
|
default:
|
|
fprintf(stderr, "%s: unexpected syscall %d\n",
|
|
__FUNCTION__, new);
|
|
return -1;
|
|
}
|
|
if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_R1), new) < 0)
|
|
return -1;
|
|
} else if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_R15), new) < 0)
|
|
return -1;
|
|
return 0;
|
|
#elif defined(HPPA)
|
|
if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_GR20), new) < 0)
|
|
return -1;
|
|
return 0;
|
|
#elif defined(SH)
|
|
if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(4*(REG_REG0+3)), new) < 0)
|
|
return -1;
|
|
return 0;
|
|
#elif defined(SH64)
|
|
/* Top half of reg encodes the no. of args n as 0x1n.
|
|
Assume 0 args as kernel never actually checks... */
|
|
if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_SYSCALL),
|
|
0x100000 | new) < 0)
|
|
return -1;
|
|
return 0;
|
|
#elif defined(CRISV10) || defined(CRISV32)
|
|
if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(4*PT_R9), new) < 0)
|
|
return -1;
|
|
return 0;
|
|
#elif defined(ARM)
|
|
/* Some kernels support this, some (pre-2.6.16 or so) don't. */
|
|
# ifndef PTRACE_SET_SYSCALL
|
|
# define PTRACE_SET_SYSCALL 23
|
|
# endif
|
|
if (ptrace(PTRACE_SET_SYSCALL, tcp->pid, 0, new & 0xffff) != 0)
|
|
return -1;
|
|
return 0;
|
|
#elif defined(AARCH64)
|
|
/* setbpt/clearbpt never used: */
|
|
/* AARCH64 is only supported since about linux-3.0.31 */
|
|
#elif defined(TILE)
|
|
/* setbpt/clearbpt never used: */
|
|
/* Tilera CPUs are only supported since about linux-2.6.34 */
|
|
#elif defined(MICROBLAZE)
|
|
/* setbpt/clearbpt never used: */
|
|
/* microblaze is only supported since about linux-2.6.30 */
|
|
#elif defined(OR1K)
|
|
/* never reached; OR1K is only supported by kernels since 3.1.0. */
|
|
#elif defined(METAG)
|
|
/* setbpt/clearbpt never used: */
|
|
/* Meta is only supported since linux-3.7 */
|
|
#elif defined(XTENSA)
|
|
/* setbpt/clearbpt never used: */
|
|
/* Xtensa is only supported since linux 2.6.13 */
|
|
#else
|
|
#warning Do not know how to handle change_syscall for this architecture
|
|
#endif /* architecture */
|
|
return -1;
|
|
}
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
if (tcp->s_ent->sys_func == sys_fork ||
|
|
tcp->s_ent->sys_func == 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, &state,
|
|
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;
|
|
}
|
|
|
|
if (tcp->s_ent->sys_func == sys_clone) {
|
|
/* ia64 calls directly `clone (CLONE_VFORK | CLONE_VM)'
|
|
contrary to x86 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->inst[0] = tcp->u_arg[arg0_index];
|
|
tcp->inst[1] = tcp->u_arg[arg1_index];
|
|
tcp->flags |= TCB_BPTSET;
|
|
return 0;
|
|
}
|
|
|
|
fprintf(stderr, "PANIC: setbpt for syscall %ld on %u???\n",
|
|
tcp->scno, tcp->pid);
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
clearbpt(struct tcb *tcp)
|
|
{
|
|
arg_setup_state state;
|
|
if (arg_setup(tcp, &state) < 0
|
|
|| change_syscall(tcp, &state, tcp->scno) < 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;
|
|
}
|