Select.cpp

   1 /* Cycript - Optimizing JavaScript Compiler/Runtime
   2  * Copyright (C) 2009-2013  Jay Freeman (saurik)
   3 */
   4
   5 /* GNU General Public License, Version 3 {{{ */
   6 /*
   7  * Cycript is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published
   9  * by the Free Software Foundation, either version 3 of the License,
  10  * or (at your option) any later version.
  11  *
  12  * Cycript is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with Cycript.  If not, see <http://www.gnu.org/licenses/>.
  19 **/
  20 /* }}} */
  21
  22 #include <cstring>
  23
  24 #include <stdint.h>
  25
  26 #include <dlfcn.h>
  27 #include <syslog.h>
  28 #include <unistd.h>
  29
  30 #include <mach-o/dyld.h>
  31
  32 extern "C" void CYHandleServer(pid_t pid) {
  33     Dl_info addr;
  34     if (dladdr(reinterpret_cast<void *>(&CYHandleServer), &addr) == 0)
  35         return;
  36
  37     const char *fname(addr.dli_fname);
  38     size_t length(strlen(fname));
  39
  40     const char *target;
  41 #ifdef __APPLE__
  42     // XXX: THIS IS HORRIBLE OMG I NEED TO FIX THIS ASAP
  43     bool simulator(false);
  44     for (uint32_t i(0), e(_dyld_image_count()); i != e; ++i) {
  45         if (strstr(_dyld_get_image_name(i), "/SDKs/iPhoneSimulator") != NULL)
  46             simulator = true;
  47     }
  48     if (simulator)
  49         target = "sim";
  50     else
  51 #endif
  52     // someone threw a fit about dangling #endif + else
  53     // the idea that this bothers someone gives me glee
  54     target = "sys";
  55
  56     char library[length + 1];
  57     memcpy(library, fname, length);
  58     memcpy(library + length - 6 - 3, target, 3);
  59     library[length] = '\0';
  60
  61     void *handle(dlopen(library, RTLD_LOCAL | RTLD_LAZY));
  62     if (handle == NULL) {
  63         syslog(LOG_ERR, "dlopen() -> %s", dlerror());
  64         return;
  65     }
  66
  67     void *symbol(dlsym(handle, "CYHandleServer"));
  68     if (symbol == NULL)
  69         return;
  70
  71     reinterpret_cast<void (*)(pid_t)>(symbol)(pid);
  72 }