native_client_sdk/src/tools/sel_ldr.py

   1 #!/usr/bin/env python
   2 # Copyright 2013 The Chromium Authors. All rights reserved.
   3 # Use of this source code is governed by a BSD-style license that can be
   4 # found in the LICENSE file.
   5
   6 """Wrapper script for launching application within the sel_ldr.
   7 """
   8
   9 import optparse
  10 import os
  11 import subprocess
  12 import sys
  13
  14 import create_nmf
  15 import getos
  16
  17 SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
  18 NACL_SDK_ROOT = os.path.dirname(SCRIPT_DIR)
  19
  20 if sys.version_info < (2, 6, 0):
  21   sys.stderr.write("python 2.6 or later is required run this script\n")
  22   sys.exit(1)
  23
  24
  25 class Error(Exception):
  26   pass
  27
  28
  29 def Log(msg):
  30   if Log.verbose:
  31     sys.stderr.write(str(msg) + '\n')
  32 Log.verbose = False
  33
  34
  35 def main(argv):
  36   usage = 'Usage: %prog [options] <.nexe>'
  37   epilog = 'Example: sel_ldr.py my_nexe.nexe'
  38   parser = optparse.OptionParser(usage, description=__doc__, epilog=epilog)
  39   parser.add_option('-v', '--verbose', action='store_true',
  40                     help='Verbose output')
  41   parser.add_option('-d', '--debug', action='store_true',
  42                     help='Enable debug stub')
  43   parser.add_option('--debug-libs', action='store_true',
  44                     help='For dynamic executables, reference debug '
  45                          'libraries rather then release')
  46
  47   # To enable bash completion for this command first install optcomplete
  48   # and then add this line to your .bashrc:
  49   #  complete -F _optcomplete sel_ldr.py
  50   try:
  51     import optcomplete
  52     optcomplete.autocomplete(parser)
  53   except ImportError:
  54     pass
  55
  56   options, args = parser.parse_args(argv)
  57   if not args:
  58     parser.error('No executable file specified')
  59
  60   nexe = args[0]
  61   if options.verbose:
  62     Log.verbose = True
  63
  64   osname = getos.GetPlatform()
  65   if not os.path.exists(nexe):
  66     raise Error('executable not found: %s' % nexe)
  67   if not os.path.isfile(nexe):
  68     raise Error('not a file: %s' % nexe)
  69
  70   arch, dynamic = create_nmf.ParseElfHeader(nexe)
  71
  72   if arch == 'arm':
  73     raise Error('Cannot run ARM executables under sel_ldr')
  74
  75   arch_suffix = arch.replace('-', '_')
  76
  77   sel_ldr = os.path.join(SCRIPT_DIR, 'sel_ldr_%s' % arch_suffix)
  78   irt = os.path.join(SCRIPT_DIR, 'irt_core_%s.nexe' % arch_suffix)
  79   if osname == 'win':
  80     sel_ldr += '.exe'
  81   Log('ROOT    = %s' % NACL_SDK_ROOT)
  82   Log('SEL_LDR = %s' % sel_ldr)
  83   Log('IRT     = %s' % irt)
  84   cmd = [sel_ldr]
  85
  86   if osname == 'linux':
  87     # Run sel_ldr under nacl_helper_bootstrap
  88     helper = os.path.join(SCRIPT_DIR, 'nacl_helper_bootstrap_%s' % arch_suffix)
  89     Log('HELPER  = %s' % helper)
  90     cmd.insert(0, helper)
  91     cmd.append('--r_debug=0xXXXXXXXXXXXXXXXX')
  92     cmd.append('--reserved_at_zero=0xXXXXXXXXXXXXXXXX')
  93
  94   cmd += ['-a', '-B', irt]
  95
  96   if options.debug:
  97     cmd.append('-g')
  98
  99   if not options.verbose:
 100     cmd += ['-l', os.devnull]
 101
 102   if dynamic:
 103     if options.debug_libs:
 104       libpath = os.path.join(NACL_SDK_ROOT, 'lib',
 105                             'glibc_%s' % arch_suffix, 'Debug')
 106     else:
 107       libpath = os.path.join(NACL_SDK_ROOT, 'lib',
 108                             'glibc_%s' % arch_suffix, 'Release')
 109     toolchain = '%s_x86_glibc' % osname
 110     sdk_lib_dir = os.path.join(NACL_SDK_ROOT, 'toolchain',
 111                                toolchain, 'x86_64-nacl')
 112     if arch == 'x86-64':
 113       sdk_lib_dir = os.path.join(sdk_lib_dir, 'lib')
 114     else:
 115       sdk_lib_dir = os.path.join(sdk_lib_dir, 'lib32')
 116     ldso = os.path.join(sdk_lib_dir, 'runnable-ld.so')
 117     cmd.append(ldso)
 118     Log('LD.SO = %s' % ldso)
 119     libpath += ':' + sdk_lib_dir
 120     cmd.append('--library-path')
 121     cmd.append(libpath)
 122
 123
 124   if args:
 125     # Append arguments for the executable itself.
 126     cmd += args
 127
 128   Log(cmd)
 129   rtn = subprocess.call(cmd)
 130   return rtn
 131
 132
 133 if __name__ == '__main__':
 134   try:
 135     sys.exit(main(sys.argv[1:]))
 136   except Error as e:
 137     sys.stderr.write(str(e) + '\n')
 138     sys.exit(1)