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(channel_buf_, sizeof(channel_buf_), "%d:%u",
  52             imc_fd, imc_channel_handle);
  53   _snprintf(channel_number_, sizeof(channel_number_), "%d", imc_fd);
  54 #else
  55   snprintf(channel_buf_,
  56            sizeof(channel_buf_),
  57            "%d:%d",
  58            imc_fd,
  59            imc_channel_handle);
  60   snprintf(channel_number_, sizeof(channel_number_), "%d", imc_fd);
  61 #endif
  62   // Fixed args are:
  63   // .../sel_ldr -f <application_name> -i <NaCl fd>:<imcchannel#>
  64   const char* kFixedArgs[] = {
  65     const_cast<char*>(sel_ldr_pathname),
  66     "-f",
  67     const_cast<char*>(application_name),
  68     "-i",
  69     channel_buf_
  70   };
  71   const int kFixedArgc = sizeof(kFixedArgs) / sizeof(kFixedArgs[0]);
  72
  73   argv_ = new char const*[kFixedArgc + sel_ldr_argc
  74                           + (application_argc + 1) + 1];
  75   // We use pre-increment everywhere, so we need to initialize to -1.
  76   argc_ = -1;
  77
  78   // Copy the fixed arguments to argv_.
  79   for (int i = 0; i < kFixedArgc; ++i) {
  80     argv_[++argc_] = kFixedArgs[i];
  81   }
  82   // Copy the specified additional arguments (e.g., "-d" or "-P") to sel_ldr
  83   for (int i = 0; i < sel_ldr_argc; ++i) {
  84     argv_[++argc_] = sel_ldr_argv[i];
  85   }
  86   // Copy the specified arguments to the application
  87   if (application_argc > 0) {
  88     argv_[++argc_] = "--";
  89     for (int i = 0; i < application_argc; ++i) {
  90       if (strncmp("$CHAN", application_argv[i], 6) == 0) {
  91         argv_[++argc_] = channel_number_;
  92       } else {
  93         argv_[++argc_] = application_argv[i];
  94       }
  95     }
  96   }
  97   // NULL terminate the argument list.
  98   argv_[++argc_] = NULL;
  99 }
 100
 101 }  // namespace nacl