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# Copyright 2014 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can b
# found in the LICENSE file.
import os
import subprocess
import sys
# OS_ARCH_COMBOS maps from OS and platform to the OpenSSL assembly "style" for
# that platform and the extension used by asm files.
OS_ARCH_COMBOS = [
('linux', 'arm', 'elf', [''], 'S'),
('linux', 'x86', 'elf', ['-fPIC'], 'S'),
('linux', 'x86_64', 'elf', [''], 'S'),
('linux', 'aarch64', 'linux64', [''], 'S'),
('mac', 'x86', 'macosx', ['-fPIC'], 'S'),
('mac', 'x86_64', 'macosx', [''], 'S'),
('win', 'x86_64', 'masm', [''], 'asm'),
]
# NON_PERL_FILES enumerates assembly files that are not processed by the
# perlasm system.
NON_PERL_FILES = {
('linux', 'arm'): [
'src/crypto/poly1305/poly1305_arm_asm.S',
'src/crypto/chacha/chacha_vec_arm.S',
],
}
FILE_HEADER = """# This file is created by update_gypi_and_asm.py. Do not edit manually.
"""
def FindCMakeFiles(directory):
"""Returns list of all CMakeLists.txt files recursively in directory."""
cmakefiles = []
for (path, _, filenames) in os.walk(directory):
for filename in filenames:
if filename == 'CMakeLists.txt':
cmakefiles.append(os.path.join(path, filename))
return cmakefiles
def NoTests(dent, is_dir):
"""Filter function that can be passed to FindCFiles in order to remove test
sources."""
if is_dir:
return dent != 'test'
return 'test.' not in dent and not dent.startswith('example_')
def OnlyTests(dent, is_dir):
"""Filter function that can be passed to FindCFiles in order to remove
non-test sources."""
if is_dir:
return True
return '_test.' in dent or dent.startswith('example_')
def FindCFiles(directory, filter_func):
"""Recurses through directory and returns a list of paths to all the C source
files that pass filter_func."""
cfiles = []
for (path, dirnames, filenames) in os.walk(directory):
for filename in filenames:
if (filename.endswith('.c') or filename.endswith('.cc')) and filter_func(
filename, False):
cfiles.append(os.path.join(path, filename))
continue
for (i, dirname) in enumerate(dirnames):
if not filter_func(dirname, True):
del dirnames[i]
return cfiles
def ExtractPerlAsmFromCMakeFile(cmakefile):
"""Parses the contents of the CMakeLists.txt file passed as an argument and
returns a list of all the perlasm() directives found in the file."""
perlasms = []
with open(cmakefile) as f:
for line in f:
line = line.strip()
if not line.startswith('perlasm('):
continue
if not line.endswith(')'):
raise ValueError('Bad perlasm line in %s' % cmakefile)
# Remove "perlasm(" from start and ")" from end
params = line[8:-1].split()
if len(params) < 2:
raise ValueError('Bad perlasm line in %s' % cmakefile)
perlasms.append({
'extra_args': params[2:],
'input': os.path.join(os.path.dirname(cmakefile), params[1]),
'output': os.path.join(os.path.dirname(cmakefile), params[0]),
})
return perlasms
def ReadPerlAsmOperations():
"""Returns a list of all perlasm() directives found in CMake config files in
src/."""
perlasms = []
cmakefiles = FindCMakeFiles('src')
for cmakefile in cmakefiles:
perlasms.extend(ExtractPerlAsmFromCMakeFile(cmakefile))
return perlasms
def PerlAsm(output_filename, input_filename, perlasm_style, extra_args):
"""Runs the a perlasm script and puts the output into output_filename."""
base_dir = os.path.dirname(output_filename)
if not os.path.isdir(base_dir):
os.makedirs(base_dir)
output = subprocess.check_output(
['perl', input_filename, perlasm_style] + extra_args)
with open(output_filename, 'w+') as out_file:
out_file.write(output)
def ArchForAsmFilename(filename):
"""Returns the architectures that a given asm file should be compiled for
based on substrings in the filename."""
if 'x86_64' in filename or 'avx2' in filename:
return ['x86_64']
elif ('x86' in filename and 'x86_64' not in filename) or '586' in filename:
return ['x86']
elif 'armx' in filename:
return ['arm', 'aarch64']
elif 'armv8' in filename:
return ['aarch64']
elif 'arm' in filename:
return ['arm']
else:
raise ValueError('Unknown arch for asm filename: ' + filename)
def WriteAsmFiles(perlasms):
"""Generates asm files from perlasm directives for each supported OS x
platform combination."""
asmfiles = {}
for osarch in OS_ARCH_COMBOS:
(osname, arch, perlasm_style, extra_args, asm_ext) = osarch
key = (osname, arch)
outDir = '%s-%s' % key
for perlasm in perlasms:
filename = os.path.basename(perlasm['input'])
output = perlasm['output']
if not output.startswith('src'):
raise ValueError('output missing src: %s' % output)
output = os.path.join(outDir, output[4:])
output = output.replace('${ASM_EXT}', asm_ext)
if arch in ArchForAsmFilename(filename):
PerlAsm(output, perlasm['input'], perlasm_style,
perlasm['extra_args'] + extra_args)
asmfiles.setdefault(key, []).append(output)
for (key, non_perl_asm_files) in NON_PERL_FILES.iteritems():
asmfiles.setdefault(key, []).extend(non_perl_asm_files)
return asmfiles
def PrintVariableSection(out, name, files):
out.write('%s := \\\n' % name)
for f in sorted(files):
out.write(' %s\\\n' % f)
out.write('\n')
def main():
crypto_c_files = FindCFiles(os.path.join('src', 'crypto'), NoTests)
ssl_c_files = FindCFiles(os.path.join('src', 'ssl'), NoTests)
tool_cc_files = FindCFiles(os.path.join('src', 'tool'), NoTests)
crypto_c_files.append('android_compat_hacks.c')
crypto_c_files.append('android_compat_keywrap.c')
with open('sources.mk', 'w+') as makefile:
makefile.write(FILE_HEADER)
PrintVariableSection(
makefile, 'crypto_sources', crypto_c_files)
PrintVariableSection(
makefile, 'ssl_sources', ssl_c_files)
PrintVariableSection(
makefile, 'tool_sources', tool_cc_files)
perlasms = ReadPerlAsmOperations()
for ((osname, arch), asm_files) in sorted(
WriteAsmFiles(perlasms).iteritems()):
PrintVariableSection(makefile, '%s_%s_sources' %
(osname, arch), asm_files)
return 0
if __name__ == '__main__':
sys.exit(main())
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