[NaCl SDK] Fix sel_ldr.py so it uses nacl_helper_bootstrap correctly.

native_client_sdk/src/tools/sel_ldr.py

Index: native_client_sdk/src/tools/sel_ldr.py
diff --git a/native_client_sdk/src/tools/sel_ldr.py b/native_client_sdk/src/tools/sel_ldr.py
index 97adf241dc5c5fe28009158ff406680da216559c..911a853f91e228698060eb6492b5959e14073321 100755
--- a/native_client_sdk/src/tools/sel_ldr.py
+++ b/native_client_sdk/src/tools/sel_ldr.py
@@ -81,15 +81,23 @@ def main(argv):
   Log('ROOT    = %s' % NACL_SDK_ROOT)
   Log('SEL_LDR = %s' % sel_ldr)
   Log('IRT     = %s' % irt)
-  cmd = [sel_ldr, '-a', '-B', irt, '-l', os.devnull]
-
-  if options.debug:
-    cmd.append('-g')
+  cmd = [sel_ldr]
 
   if osname == 'linux':
+    # Run sel_ldr under nacl_helper_bootstrap
     helper = os.path.join(SCRIPT_DIR, 'nacl_helper_bootstrap_%s' % arch_suffix)
     Log('HELPER  = %s' % helper)
     cmd.insert(0, helper)
+    cmd.append('--r_debug=0xXXXXXXXXXXXXXXXX')
+    cmd.append('--reserved_at_zero=0xXXXXXXXXXXXXXXXX')
+
+  cmd += ['-a', '-B', irt]
+
+  if options.debug:
+    cmd.append('-g')
+
+  if not options.verbose:
+    cmd += ['-l', os.devnull]
 
   if dynamic:
     if options.debug_libs:
@@ -107,13 +115,16 @@ def main(argv):
       sdk_lib_dir = os.path.join(sdk_lib_dir, 'lib32')
     ldso = os.path.join(sdk_lib_dir, 'runnable-ld.so')
     cmd.append(ldso)
-    Log('LD.SO   = %s' % ldso)
+    Log('LD.SO = %s' % ldso)
     libpath += ':' + sdk_lib_dir
     cmd.append('--library-path')
     cmd.append(libpath)
 
 
-  cmd += args
+  if args:
+    # Append arguments for the executable itself.
+    cmd += args
+
   Log(cmd)
   rtn = subprocess.call(cmd)
   return rtn