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 #include "xlat/qm_which.h"
  73 #include "xlat/modflags.h"
  74
  75 int
  76 sys_query_module(struct tcb *tcp)
  77 {
  78         if (entering(tcp)) {
  79                 printstr(tcp, tcp->u_arg[0], -1);
  80                 tprints(", ");
  81                 printxval(qm_which, tcp->u_arg[1], "QM_???");
  82                 tprints(", ");
  83         } else {
  84                 size_t ret;
  85
  86                 if (!verbose(tcp) || syserror(tcp) ||
  87                     umove(tcp, tcp->u_arg[4], &ret) < 0) {
  88                         tprintf("%#lx, %lu, %#lx", tcp->u_arg[2],
  89                                 tcp->u_arg[3], tcp->u_arg[4]);
  90                 } else if (tcp->u_arg[1]==QM_INFO) {
  91                         struct module_info      mi;
  92                         if (umove(tcp, tcp->u_arg[2], &mi) < 0) {
  93                                 tprintf("%#lx, ", tcp->u_arg[2]);
  94                         } else {
  95                                 tprintf("{address=%#lx, size=%lu, flags=",
  96                                         mi.addr, mi.size);
  97                                 printflags(modflags, mi.flags, "MOD_???");
  98                                 tprintf(", usecount=%lu}, ", mi.usecount);
  99                         }
 100                         tprintf("%lu", (unsigned long)ret);
 101                 } else if ((tcp->u_arg[1]==QM_MODULES) ||
 102                            (tcp->u_arg[1]==QM_DEPS) ||
 103                            (tcp->u_arg[1]==QM_REFS)) {
 104                         tprints("{");
 105                         if (!abbrev(tcp)) {
 106                                 char*   data    = malloc(tcp->u_arg[3]);
 107                                 char*   mod     = data;
 108                                 size_t  idx;
 109
 110                                 if (!data) {
 111                                         fprintf(stderr, "out of memory\n");
 112                                         tprintf(" /* %lu entries */ ", (unsigned long)ret);
 113                                 } else {
 114                                         if (umoven(tcp, tcp->u_arg[2],
 115                                                 tcp->u_arg[3], data) < 0) {
 116                                                 tprintf(" /* %lu entries */ ", (unsigned long)ret);
 117                                         } else {
 118                                                 for (idx = 0; idx < ret; idx++) {
 119                                                         tprintf("%s%s",
 120                                                                 (idx ? ", " : ""),
 121                                                                 mod);
 122                                                         mod += strlen(mod)+1;
 123                                                 }
 124                                         }
 125                                         free(data);
 126                                 }
 127                         } else
 128                                 tprintf(" /* %lu entries */ ", (unsigned long)ret);
 129                         tprintf("}, %lu", (unsigned long)ret);
 130                 } else if (tcp->u_arg[1]==QM_SYMBOLS) {
 131                         tprints("{");
 132                         if (!abbrev(tcp)) {
 133                                 char*                   data    = malloc(tcp->u_arg[3]);
 134                                 struct module_symbol*   sym     = (struct module_symbol*)data;
 135                                 size_t                  idx;
 136
 137                                 if (!data) {
 138                                         fprintf(stderr, "out of memory\n");
 139                                         tprintf(" /* %lu entries */ ", (unsigned long)ret);
 140                                 } else {
 141                                         if (umoven(tcp, tcp->u_arg[2],
 142                                                 tcp->u_arg[3], data) < 0) {
 143                                                 tprintf(" /* %lu entries */ ", (unsigned long)ret);
 144                                         } else {
 145                                                 for (idx = 0; idx < ret; idx++) {
 146                                                         tprintf("%s{name=%s, value=%lu}",
 147                                                                 (idx ? " " : ""),
 148                                                                 data+(long)sym->name,
 149                                                                 sym->value);
 150                                                         sym++;
 151                                                 }
 152                                         }
 153                                         free(data);
 154                                 }
 155                         } else
 156                                 tprintf(" /* %lu entries */ ", (unsigned long)ret);
 157                         tprintf("}, %ld", (unsigned long)ret);
 158                 } else {
 159                         printstr(tcp, tcp->u_arg[2], tcp->u_arg[3]);
 160                         tprintf(", %#lx", tcp->u_arg[4]);
 161                 }
 162         }
 163         return 0;
 164 }
 165
 166 int
 167 sys_create_module(struct tcb *tcp)
 168 {
 169         if (entering(tcp)) {
 170                 printpath(tcp, tcp->u_arg[0]);
 171                 tprintf(", %lu", tcp->u_arg[1]);
 172         }
 173         return RVAL_HEX;
 174 }
 175
 176 int
 177 sys_init_module(struct tcb *tcp)
 178 {
 179         if (entering(tcp)) {
 180                 tprintf("%#lx, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
 181                 printstr(tcp, tcp->u_arg[2], -1);
 182         }
 183         return 0;
 184 }
 185
 186 #define MODULE_INIT_IGNORE_MODVERSIONS  1
 187 #define MODULE_INIT_IGNORE_VERMAGIC     2
 188
 189 #include "xlat/module_init_flags.h"
 190
 191 int
 192 sys_finit_module(struct tcb *tcp)
 193 {
 194         if (exiting(tcp))
 195                 return 0;
 196
 197         /* file descriptor */
 198         printfd(tcp, tcp->u_arg[0]);
 199         tprints(", ");
 200         /* param_values */
 201         printstr(tcp, tcp->u_arg[1], -1);
 202         tprints(", ");
 203         /* flags */
 204         printflags(module_init_flags, tcp->u_arg[2], "MODULE_INIT_???");
 205
 206         return 0;
 207 }