granicus.if.org Git - strace/blob - bjm.c

   1 /*
   2  * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
   3  * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
   4  * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
   5  * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. The name of the author may not be used to endorse or promote products
  17  *    derived from this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 #include "defs.h"
  32 #include <fcntl.h>
  33 #include <sys/stat.h>
  34 #include <sys/wait.h>
  35 #include <sys/resource.h>
  36 #include <sys/utsname.h>
  37 #include <sys/user.h>
  38
  39 /* Bits of module.flags.  */
  40
  41 #define MOD_UNINITIALIZED       0
  42 #define MOD_RUNNING             1
  43 #define MOD_DELETED             2
  44 #define MOD_AUTOCLEAN           4
  45 #define MOD_VISITED             8
  46 #define MOD_USED_ONCE           16
  47 #define MOD_JUST_FREED          32
  48 #define MOD_INITIALIZING        64
  49
  50 /* Values for query_module's which.  */
  51
  52 #define QM_MODULES      1
  53 #define QM_DEPS         2
  54 #define QM_REFS         3
  55 #define QM_SYMBOLS      4
  56 #define QM_INFO         5
  57
  58 struct module_symbol
  59 {
  60         unsigned long value;
  61         const char *name;
  62 };
  63
  64 struct module_info
  65 {
  66         unsigned long addr;
  67         unsigned long size;
  68         unsigned long flags;
  69         long usecount;
  70 };
  71
  72 static const struct xlat which[] = {
  73         XLAT(0),
  74         XLAT(QM_MODULES),
  75         XLAT(QM_DEPS),
  76         XLAT(QM_REFS),
  77         XLAT(QM_SYMBOLS),
  78         XLAT(QM_INFO),
  79         XLAT_END
  80 };
  81
  82 static const struct xlat modflags[] = {
  83         XLAT(MOD_UNINITIALIZED),
  84         XLAT(MOD_RUNNING),
  85         XLAT(MOD_DELETED),
  86         XLAT(MOD_AUTOCLEAN),
  87         XLAT(MOD_VISITED),
  88         XLAT(MOD_USED_ONCE),
  89         XLAT(MOD_JUST_FREED),
  90         XLAT_END
  91 };
  92
  93 int
  94 sys_query_module(struct tcb *tcp)
  95 {
  96         if (entering(tcp)) {
  97                 printstr(tcp, tcp->u_arg[0], -1);
  98                 tprints(", ");
  99                 printxval(which, tcp->u_arg[1], "QM_???");
 100                 tprints(", ");
 101         } else {
 102                 size_t ret;
 103
 104                 if (!verbose(tcp) || syserror(tcp) ||
 105                     umove(tcp, tcp->u_arg[4], &ret) < 0) {
 106                         tprintf("%#lx, %lu, %#lx", tcp->u_arg[2],
 107                                 tcp->u_arg[3], tcp->u_arg[4]);
 108                 } else if (tcp->u_arg[1]==QM_INFO) {
 109                         struct module_info      mi;
 110                         if (umove(tcp, tcp->u_arg[2], &mi) < 0) {
 111                                 tprintf("%#lx, ", tcp->u_arg[2]);
 112                         } else {
 113                                 tprintf("{address=%#lx, size=%lu, flags=",
 114                                         mi.addr, mi.size);
 115                                 printflags(modflags, mi.flags, "MOD_???");
 116                                 tprintf(", usecount=%lu}, ", mi.usecount);
 117                         }
 118                         tprintf("%lu", (unsigned long)ret);
 119                 } else if ((tcp->u_arg[1]==QM_MODULES) ||
 120                            (tcp->u_arg[1]==QM_DEPS) ||
 121                            (tcp->u_arg[1]==QM_REFS)) {
 122                         tprints("{");
 123                         if (!abbrev(tcp)) {
 124                                 char*   data    = malloc(tcp->u_arg[3]);
 125                                 char*   mod     = data;
 126                                 size_t  idx;
 127
 128                                 if (!data) {
 129                                         fprintf(stderr, "out of memory\n");
 130                                         tprintf(" /* %lu entries */ ", (unsigned long)ret);
 131                                 } else {
 132                                         if (umoven(tcp, tcp->u_arg[2],
 133                                                 tcp->u_arg[3], data) < 0) {
 134                                                 tprintf(" /* %lu entries */ ", (unsigned long)ret);
 135                                         } else {
 136                                                 for (idx = 0; idx < ret; idx++) {
 137                                                         tprintf("%s%s",
 138                                                                 (idx ? ", " : ""),
 139                                                                 mod);
 140                                                         mod += strlen(mod)+1;
 141                                                 }
 142                                         }
 143                                         free(data);
 144                                 }
 145                         } else
 146                                 tprintf(" /* %lu entries */ ", (unsigned long)ret);
 147                         tprintf("}, %lu", (unsigned long)ret);
 148                 } else if (tcp->u_arg[1]==QM_SYMBOLS) {
 149                         tprints("{");
 150                         if (!abbrev(tcp)) {
 151                                 char*                   data    = malloc(tcp->u_arg[3]);
 152                                 struct module_symbol*   sym     = (struct module_symbol*)data;
 153                                 size_t                  idx;
 154
 155                                 if (!data) {
 156                                         fprintf(stderr, "out of memory\n");
 157                                         tprintf(" /* %lu entries */ ", (unsigned long)ret);
 158                                 } else {
 159                                         if (umoven(tcp, tcp->u_arg[2],
 160                                                 tcp->u_arg[3], data) < 0) {
 161                                                 tprintf(" /* %lu entries */ ", (unsigned long)ret);
 162                                         } else {
 163                                                 for (idx = 0; idx < ret; idx++) {
 164                                                         tprintf("%s{name=%s, value=%lu}",
 165                                                                 (idx ? " " : ""),
 166                                                                 data+(long)sym->name,
 167                                                                 sym->value);
 168                                                         sym++;
 169                                                 }
 170                                         }
 171                                         free(data);
 172                                 }
 173                         } else
 174                                 tprintf(" /* %lu entries */ ", (unsigned long)ret);
 175                         tprintf("}, %ld", (unsigned long)ret);
 176                 } else {
 177                         printstr(tcp, tcp->u_arg[2], tcp->u_arg[3]);
 178                         tprintf(", %#lx", tcp->u_arg[4]);
 179                 }
 180         }
 181         return 0;
 182 }
 183
 184 int
 185 sys_create_module(struct tcb *tcp)
 186 {
 187         if (entering(tcp)) {
 188                 printpath(tcp, tcp->u_arg[0]);
 189                 tprintf(", %lu", tcp->u_arg[1]);
 190         }
 191         return RVAL_HEX;
 192 }
 193
 194 int
 195 sys_init_module(struct tcb *tcp)
 196 {
 197         if (entering(tcp)) {
 198                 tprintf("%#lx, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
 199                 printstr(tcp, tcp->u_arg[2], -1);
 200         }
 201         return 0;
 202 }
 203
 204 #define MODULE_INIT_IGNORE_MODVERSIONS  1
 205 #define MODULE_INIT_IGNORE_VERMAGIC     2
 206
 207 static const struct xlat module_init_flags[] = {
 208         XLAT(MODULE_INIT_IGNORE_MODVERSIONS),
 209         XLAT(MODULE_INIT_IGNORE_VERMAGIC),
 210         XLAT_END
 211 };
 212
 213 int
 214 sys_finit_module(struct tcb *tcp)
 215 {
 216         if (exiting(tcp))
 217                 return 0;
 218
 219         /* file descriptor */
 220         printfd(tcp, tcp->u_arg[0]);
 221         tprints(", ");
 222         /* param_values */
 223         printstr(tcp, tcp->u_arg[1], -1);
 224         tprints(", ");
 225         /* flags */
 226         printflags(module_init_flags, tcp->u_arg[2], "MODULE_INIT_???");
 227
 228         return 0;
 229 }