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1 #!/usr/bin/env python | 1 #!/usr/bin/env python |
2 # | 2 # |
3 # Copyright 2014 The Chromium Authors. All rights reserved. | 3 # Copyright 2014 The Chromium Authors. All rights reserved. |
4 # Use of this source code is governed by a BSD-style license that can be | 4 # Use of this source code is governed by a BSD-style license that can be |
5 # found in the LICENSE file. | 5 # found in the LICENSE file. |
6 | 6 |
7 """Pack ARM relative relocations in a library (or copy unchanged). | 7 """Pack relocations in a library (or copy unchanged). |
8 | 8 |
9 If --enable-packing and --configuration-name=='Release', invoke the | 9 If --enable-packing and --configuration-name=='Release', invoke the |
10 relocation_packer tool to pack the .rel.dyn or .rela.dyn section in the given | 10 relocation_packer tool to pack the .rel.dyn or .rela.dyn section in the given |
11 library files. This step is inserted after the libraries are stripped. | 11 library files. This step is inserted after the libraries are stripped. |
12 Packing adds a new .android.rel.dyn or .android.rela.dyn section to the file | |
13 and reduces the size of .rel.dyn or .rela.dyn accordingly. | |
14 | 12 |
15 Currently packing only understands ARM32 shared libraries. For all other | 13 If --enable-packing is zero, the script copies files verbatim, with no |
16 architectures --enable-packing should be set to zero. In this case the | 14 attempt to pack relocations. |
17 script copies files verbatim, with no attempt to pack relative relocations. | |
18 | 15 |
19 Any library listed in --exclude-packing-list is also copied verbatim, | 16 Any library listed in --exclude-packing-list is also copied verbatim, |
20 irrespective of any --enable-packing setting. Typically this would be | 17 irrespective of any --enable-packing setting. Typically this would be |
21 'libchromium_android_linker.so'. | 18 'libchromium_android_linker.so'. |
22 """ | 19 """ |
23 | 20 |
24 import optparse | 21 import optparse |
25 import os | 22 import os |
26 import shlex | 23 import shlex |
27 import shutil | 24 import shutil |
28 import sys | 25 import sys |
29 import tempfile | 26 import tempfile |
30 | 27 |
31 from util import build_utils | 28 from util import build_utils |
32 | 29 |
33 def PackArmLibraryRelocations(android_pack_relocations, | 30 def PackLibraryRelocations(android_pack_relocations, library_path, output_path): |
34 android_objcopy, | 31 shutil.copy(library_path, output_path) |
35 has_relocations_with_addends, | |
36 library_path, | |
37 output_path): | |
38 # Select an appropriate name for the section we add. | |
39 if has_relocations_with_addends: | |
40 new_section = '.android.rela.dyn' | |
41 else: | |
42 new_section = '.android.rel.dyn' | |
43 | |
44 # Copy and add a 'NULL' packed relocations section for the packing tool. | |
45 with tempfile.NamedTemporaryFile() as stream: | |
46 stream.write('NULL') | |
47 stream.flush() | |
48 objcopy_command = [android_objcopy, | |
49 '--add-section', '%s=%s' % (new_section, stream.name), | |
50 library_path, output_path] | |
51 build_utils.CheckOutput(objcopy_command) | |
52 | |
53 # Pack R_ARM_RELATIVE relocations. | |
54 pack_command = [android_pack_relocations, output_path] | 32 pack_command = [android_pack_relocations, output_path] |
55 build_utils.CheckOutput(pack_command) | 33 build_utils.CheckOutput(pack_command) |
56 | 34 |
57 | 35 |
58 def CopyArmLibraryUnchanged(library_path, output_path): | 36 def CopyLibraryUnchanged(library_path, output_path): |
59 shutil.copy(library_path, output_path) | 37 shutil.copy(library_path, output_path) |
60 | 38 |
61 | 39 |
62 def main(args): | 40 def main(args): |
63 args = build_utils.ExpandFileArgs(args) | 41 args = build_utils.ExpandFileArgs(args) |
64 parser = optparse.OptionParser() | 42 parser = optparse.OptionParser() |
65 build_utils.AddDepfileOption(parser) | 43 build_utils.AddDepfileOption(parser) |
66 parser.add_option('--clear-dir', action='store_true', | 44 parser.add_option('--clear-dir', action='store_true', |
67 help='If set, the destination directory will be deleted ' | 45 help='If set, the destination directory will be deleted ' |
68 'before copying files to it. This is highly recommended to ' | 46 'before copying files to it. This is highly recommended to ' |
69 'ensure that no stale files are left in the directory.') | 47 'ensure that no stale files are left in the directory.') |
70 | 48 |
71 parser.add_option('--configuration-name', | 49 parser.add_option('--configuration-name', |
72 default='Release', | 50 default='Release', |
73 help='Gyp configuration name (i.e. Debug, Release)') | 51 help='Gyp configuration name (i.e. Debug, Release)') |
74 parser.add_option('--enable-packing', | 52 parser.add_option('--enable-packing', |
75 choices=['0', '1'], | 53 choices=['0', '1'], |
76 help=('Pack relocations if 1 and configuration name is \'Release\',' | 54 help=('Pack relocations if 1 and configuration name is \'Release\',' |
77 ' otherwise plain file copy')) | 55 ' otherwise plain file copy')) |
78 parser.add_option('--has-relocations-with-addends', | |
79 choices=['0', '1'], | |
80 help=('Pack into \'.android.rela.dyn\' if 1, else \'.android.rel.dyn\'')) | |
81 parser.add_option('--exclude-packing-list', | 56 parser.add_option('--exclude-packing-list', |
82 default='', | 57 default='', |
83 help='Names of any libraries explicitly not packed') | 58 help='Names of any libraries explicitly not packed') |
84 parser.add_option('--android-pack-relocations', | 59 parser.add_option('--android-pack-relocations', |
85 help='Path to the ARM relocations packer binary') | 60 help='Path to the relocations packer binary') |
86 parser.add_option('--android-objcopy', | |
87 help='Path to the toolchain\'s objcopy binary') | |
88 parser.add_option('--stripped-libraries-dir', | 61 parser.add_option('--stripped-libraries-dir', |
89 help='Directory for stripped libraries') | 62 help='Directory for stripped libraries') |
90 parser.add_option('--packed-libraries-dir', | 63 parser.add_option('--packed-libraries-dir', |
91 help='Directory for packed libraries') | 64 help='Directory for packed libraries') |
92 parser.add_option('--libraries', action='append', | 65 parser.add_option('--libraries', action='append', |
93 help='List of libraries') | 66 help='List of libraries') |
94 parser.add_option('--stamp', help='Path to touch on success') | 67 parser.add_option('--stamp', help='Path to touch on success') |
95 | 68 |
96 options, _ = parser.parse_args(args) | 69 options, _ = parser.parse_args(args) |
97 enable_packing = (options.enable_packing == '1' and | 70 enable_packing = (options.enable_packing == '1' and |
98 options.configuration_name == 'Release') | 71 options.configuration_name == 'Release') |
99 has_relocations_with_addends = (options.has_relocations_with_addends == '1') | |
100 exclude_packing_set = set(shlex.split(options.exclude_packing_list)) | 72 exclude_packing_set = set(shlex.split(options.exclude_packing_list)) |
101 | 73 |
102 libraries = [] | 74 libraries = [] |
103 for libs_arg in options.libraries: | 75 for libs_arg in options.libraries: |
104 libraries += build_utils.ParseGypList(libs_arg) | 76 libraries += build_utils.ParseGypList(libs_arg) |
105 | 77 |
106 if options.clear_dir: | 78 if options.clear_dir: |
107 build_utils.DeleteDirectory(options.packed_libraries_dir) | 79 build_utils.DeleteDirectory(options.packed_libraries_dir) |
108 | 80 |
109 build_utils.MakeDirectory(options.packed_libraries_dir) | 81 build_utils.MakeDirectory(options.packed_libraries_dir) |
110 | 82 |
111 for library in libraries: | 83 for library in libraries: |
112 library_path = os.path.join(options.stripped_libraries_dir, library) | 84 library_path = os.path.join(options.stripped_libraries_dir, library) |
113 output_path = os.path.join( | 85 output_path = os.path.join( |
114 options.packed_libraries_dir, os.path.basename(library)) | 86 options.packed_libraries_dir, os.path.basename(library)) |
115 | 87 |
116 if enable_packing and library not in exclude_packing_set: | 88 if enable_packing and library not in exclude_packing_set: |
117 PackArmLibraryRelocations(options.android_pack_relocations, | 89 PackLibraryRelocations(options.android_pack_relocations, |
118 options.android_objcopy, | 90 library_path, |
119 has_relocations_with_addends, | 91 output_path) |
120 library_path, | |
121 output_path) | |
122 else: | 92 else: |
123 CopyArmLibraryUnchanged(library_path, output_path) | 93 CopyLibraryUnchanged(library_path, output_path) |
124 | 94 |
125 if options.depfile: | 95 if options.depfile: |
126 build_utils.WriteDepfile( | 96 build_utils.WriteDepfile( |
127 options.depfile, | 97 options.depfile, |
128 libraries + build_utils.GetPythonDependencies()) | 98 libraries + build_utils.GetPythonDependencies()) |
129 | 99 |
130 if options.stamp: | 100 if options.stamp: |
131 build_utils.Touch(options.stamp) | 101 build_utils.Touch(options.stamp) |
132 | 102 |
133 return 0 | 103 return 0 |
134 | 104 |
135 | 105 |
136 if __name__ == '__main__': | 106 if __name__ == '__main__': |
137 sys.exit(main(sys.argv[1:])) | 107 sys.exit(main(sys.argv[1:])) |
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