nonnacl_util/sel_ldr_launcher.cc

   1 /*
   2  * Copyright 2008, Google Inc.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met:
   8  *
   9  *     * Redistributions of source code must retain the above copyright
  10  * notice, this list of conditions and the following disclaimer.
  11  *     * Redistributions in binary form must reproduce the above
  12  * copyright notice, this list of conditions and the following disclaimer
  13  * in the documentation and/or other materials provided with the
  14  * distribution.
  15  *     * Neither the name of Google Inc. nor the names of its
  16  * contributors may be used to endorse or promote products derived from
  17  * this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  20  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  22  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  23  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  24  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  25  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  29  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32
  33 #include "native_client/nonnacl_util/sel_ldr_launcher.h"
  34
  35 #include <stdio.h>
  36 #include <sys/types.h>
  37
  38 #include "native_client/include/nacl_elf.h"
  39
  40 namespace nacl {
  41
  42 void SelLdrLauncher::BuildArgv(const char* sel_ldr_pathname,
  43                                const char* application_name,
  44                                int imc_fd,
  45                                Handle imc_channel_handle,
  46                                int sel_ldr_argc,
  47                                const char* sel_ldr_argv[],
  48                                int application_argc,
  49                                const char* application_argv[]) {
  50 #if NACL_WINDOWS
  51   _snprintf_s(channel_buf_, sizeof(channel_buf_), sizeof(channel_buf_),
  52               "%d:%u", imc_fd, imc_channel_handle);
  53   _snprintf_s(channel_number_, sizeof(channel_number_), sizeof(channel_number_),
  54               "%d", imc_fd);
  55 #else
  56   snprintf(channel_buf_,
  57            sizeof(channel_buf_),
  58            "%d:%d",
  59            imc_fd,
  60            imc_channel_handle);
  61   snprintf(channel_number_, sizeof(channel_number_), "%d", imc_fd);
  62 #endif
  63   // Fixed args are:
  64   // .../sel_ldr -f <application_name> -i <NaCl fd>:<imcchannel#>
  65   const char* kFixedArgs[] = {
  66     const_cast<char*>(sel_ldr_pathname),
  67     "-f",
  68     const_cast<char*>(application_name),
  69     "-i",
  70     channel_buf_
  71   };
  72   const int kFixedArgc = sizeof(kFixedArgs) / sizeof(kFixedArgs[0]);
  73
  74   argv_ = new char const*[kFixedArgc + sel_ldr_argc
  75                           + (application_argc + 1) + 1];
  76   // We use pre-increment everywhere, so we need to initialize to -1.
  77   argc_ = -1;
  78
  79   // Copy the fixed arguments to argv_.
  80   for (int i = 0; i < kFixedArgc; ++i) {
  81     argv_[++argc_] = kFixedArgs[i];
  82   }
  83   // Copy the specified additional arguments (e.g., "-d" or "-P") to sel_ldr
  84   for (int i = 0; i < sel_ldr_argc; ++i) {
  85     argv_[++argc_] = sel_ldr_argv[i];
  86   }
  87   // Copy the specified arguments to the application
  88   if (application_argc > 0) {
  89     argv_[++argc_] = "--";
  90     for (int i = 0; i < application_argc; ++i) {
  91       if (strncmp("$CHAN", application_argv[i], 6) == 0) {
  92         argv_[++argc_] = channel_number_;
  93       } else {
  94         argv_[++argc_] = application_argv[i];
  95       }
  96     }
  97   }
  98   // NULL terminate the argument list.
  99   argv_[++argc_] = NULL;
 100 }
 101
 102 }  // namespace nacl