Initial implementation of Bare Metal Mode for NaCl.

components/nacl.gyp

 # Copyright 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'variables': {
     'chromium_code': 1,
+    'enable_bare_metal_nacl': 0,

[Mark Seaborn, 2013/12/06 03:21:16]

If we're going to test Bare Metal Mode on the Chromium buildbots (which should
happen in a later CL but not the first CL), then it can't require a build-time
flag to enable it.  It will require a run time flag instead.

So, please remove this line.  We'll at least be compile-testing on the Chromium
bots in the first CL. :-)  This means you should also run the CL through the
trybots.

[hidehiko, 2013/12/06 17:40:02]

Done.

   },
   'includes': [
     'nacl/nacl_defines.gypi',
   ],
   'target_defaults': {
     'variables': {
       'nacl_target': 0,
     },
     'target_conditions': [
       # This part is shared between the targets defined below. Only files and
@@ skipping 187 matching lines @@
                 }],
                 ['os_posix == 1 and OS != "mac"', {
                   'conditions': [
                     ['linux_use_tcmalloc==1', {
                       'dependencies': [
                         '../base/allocator/allocator.gyp:allocator',
                       ],
                     }],
                   ],
                 }],
+                ['enable_bare_metal_nacl == 1', {

[Mark Seaborn, 2013/12/06 03:21:16]

So this should just be 'os_linux==1' instead.

[hidehiko, 2013/12/06 17:40:02]

Done. Note that OS == linux is checked by enclosing condition. We also need to
restrict to ia32 arch for bare metal, now.

+                  'sources': [
+                    # Bare Metal Mode is currently experimental and available
+                    # only for linux environment.
+                    'nacl/loader/bare_metal/bare_metal_error_code.h',

[Mark Seaborn, 2013/12/06 03:21:16]

On naming: I was thinking about calling this "nonsfi" rather than "bare_metal"
in the code.

The term "bare metal" isn't really accurate because it means "without an
operating system".  It's OK as a project name, but for the codebase I think it
would be more descriptive to use the term "non-SFI".  What do you think?

[hidehiko, 2013/12/06 17:40:02]

Indeed. Done. Renamed all Bare Metal to Non SFI.

+                    'nacl/loader/bare_metal/bare_metal_main.c',
+                    'nacl/loader/bare_metal/bare_metal_main.h',
+                    'nacl/loader/bare_metal/elf_util.c',
+                    'nacl/loader/bare_metal/elf_util.h',
+                  ],
+                }]
               ],
               'cflags': ['-fPIE'],
               'link_settings': {
                 'ldflags': ['-pie'],
               },
             },
           ],
         }],
         ['OS=="win" and target_arch=="ia32"', {
           'targets': [
@@ skipping 133 matching lines @@
         'nacl/common/nacl_types.h',
         'nacl/common/pnacl_types.cc',
         'nacl/common/pnacl_types.h',
       ],
       'include_dirs': [
         '..',
       ],
     },
   ]
 }