Adds tls_edit utility which patches irt_core.nexe's TLS usage.

src/untrusted/irt/irt.gyp

 # Copyright (c) 2012 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.
 
 {
   'includes': [
     '../../../build/common.gypi',
   ],
   'variables': {
     'irt_sources': [
@@ skipping 34 matching lines @@
       'irt_core_resource.c',
     ],
     'irt_browser': [
       'irt_interfaces_ppapi.c',
       'irt_ppapi.c',
       'irt_manifest.c',
     ],
   },
   'targets': [
     {
-      'target_name': 'irt_core_nexe',
+      'target_name': 'irt_core_raw_nexe',
       'type': 'none',
       'variables': {
-        'nexe_target': 'irt_core',
+        'nexe_target': 'irt_core_raw',
+        # These out_* fields override the default filenames, which
+        # include a "_newlib" suffix and places them in the target
+        # directory.
+        'out_newlib64': '<(SHARED_INTERMEDIATE_DIR)/irt_core_x86_64_raw.nexe',
+        'out_newlib32': '<(SHARED_INTERMEDIATE_DIR)/irt_core_x86_32_raw.nexe',
+        'out_newlib_arm': '<(SHARED_INTERMEDIATE_DIR)/irt_core_arm_raw.nexe',
         'build_glibc': 0,
         'build_newlib': 0,
         'build_irt': 1,
       },
       'sources': ['<@(irt_sources)', '<@(irt_nonbrowser)'],
       'link_flags': [
         '-lsrpc',
         '-limc_syscalls',
         '-lplatform',
         '-lgio',
@@ skipping 10 matching lines @@
       'dependencies': [
         '<(DEPTH)/native_client/src/shared/gio/gio.gyp:gio_lib',
         '<(DEPTH)/native_client/src/shared/platform/platform.gyp:platform_lib',
         '<(DEPTH)/native_client/src/shared/srpc/srpc.gyp:srpc_lib',
         '<(DEPTH)/native_client/src/untrusted/nacl/nacl.gyp:imc_syscalls_lib',
         '<(DEPTH)/native_client/src/untrusted/nacl/nacl.gyp:nacl_lib_newlib',
         '<(DEPTH)/native_client/tools.gyp:prep_toolchain',
       ],
     },
     {
+      'target_name': 'irt_core_nexe',
+      'type': 'none',
+      'dependencies': [
+        'irt_core_raw_nexe',
+        '<(DEPTH)/native_client/src/tools/tls_edit/tls_edit.gyp:tls_edit#host',
+      ],
+      'conditions': [
+        ['target_arch=="arm"', {
+          'actions': [
+            {
+              'action_name': 'tls_edit_irt_arm',
+              'message': 'Patching TLS for irt_core (arm)',
+              'msvs_cygwin_shell': 0,
+              'inputs': [
+                '<(PRODUCT_DIR)/tls_edit',
+                '<(SHARED_INTERMEDIATE_DIR)/irt_core_arm_raw.nexe',
+              ],
+              'outputs': [
+                '<(PRODUCT_DIR)/irt_core_newlib_arm.nexe',
+              ],
+              'action': ['<@(_inputs)', '<@(_outputs)'],
+            },
+          ],
+        }],
+        ['target_arch!="arm"', {
+          'actions': [
+            {
+              'action_name': 'tls_edit_irt_x64',

[Mark Seaborn, 2014/02/04 18:09:10]

"x86-64" rather than "x64".  We don't use the term "x64" in NaCl.  Same for the
filename below.

+              'message': 'Patching TLS for irt_core (x86-64)',
+              'msvs_cygwin_shell': 0,
+              'inputs': [
+                '<(PRODUCT_DIR)/tls_edit',
+                '<(SHARED_INTERMEDIATE_DIR)/irt_core_x86_64_raw.nexe',
+              ],
+              'outputs': [
+                '<(PRODUCT_DIR)/irt_core_newlib_x64.nexe',

[Mark Seaborn, 2014/02/04 18:09:10]

"irt_core" shouldn't have "newlib" in the name because we always build it with
newlib.  (Same for the other two cases.)

If this is outputting to the wrong filename, I don't see how this would work,
since there is a test that uses the Gyp-built IRT.

+              ],
+              'action': ['<@(_inputs)', '<@(_outputs)'],
+            },
+            {
+              'action_name': 'tls_edit_irt_x32',

[Mark Seaborn, 2014/02/04 18:09:10]

"x86-32" (not the same as "x32"!)

+              'message': 'Patching TLS for irt_core (x86-32)',
+              'msvs_cygwin_shell': 0,
+              'inputs': [
+                '<(PRODUCT_DIR)/tls_edit',
+                '<(SHARED_INTERMEDIATE_DIR)/irt_core_x86_32_raw.nexe',
+              ],
+              'outputs': [
+                '<(PRODUCT_DIR)/irt_core_newlib_x32.nexe',
+              ],
+              'action': ['<@(_inputs)', '<@(_outputs)'],
+            },
+          ],
+        }],
+      ],
+    },
+    {
       'target_name': 'irt_browser_lib',
       'type': 'none',
       'variables': {
         'nlib_target': 'libirt_browser.a',
         'build_glibc': 0,
         'build_newlib': 1,
         'build_irt': 1,
       },
       'sources': ['<@(irt_sources)', '<@(irt_browser)'],
       'include_dirs': ['../../../../ppapi'],
       'conditions': [
         ['target_arch=="arm"', {
           'sources': [ 'aeabi_read_tp.S' ],
         }],
       ],
       'dependencies': [
         '<(DEPTH)/native_client/tools.gyp:prep_toolchain',
         '<(DEPTH)/native_client/src/untrusted/nacl/nacl.gyp:nacl_lib_newlib',
       ],
     },
   ],
 }