| #!src/build/run_python |
| |
| # Copyright 2014 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. |
| |
| # Naclize i686 *.S files. |
| |
| import re |
| import sys |
| |
| from src.build import naclize_base |
| |
| |
| class Rewriter(naclize_base.RewriterBase): |
| """Converts an i686 .S file to a nacl-i686 compatible one. |
| |
| You can use the rewriter as is for simple .S files, and when necessary, you |
| can also implement your own rewriter for more complicated .S files by |
| deriving from this class and overriding the public methods. |
| """ |
| |
| def __init__(self, file_name): |
| naclize_base.RewriterBase.__init__(self, file_name) |
| |
| def __replace_ret(self, line): |
| """Replaces ret and retl with nacl_ret.""" |
| m = re.match(r'(?P<indent>\s*)retl?.*$', line) |
| if m: |
| self._result.append('%(indent)snaclret' % m.groupdict()) |
| return True |
| # Replace 'ret' in lines like '# define RETURN_END ret', |
| # '#define RETURN ret', and '# define RETURN ... ret; CFI_PUSH (%ebp)' |
| # with 'naclret'. |
| m = re.match(r'(?P<head>.*define\s+RETURN.*\s+)ret(?P<tail>(;|\s).*)$', |
| line) |
| if m: |
| self._result.append('%(head)snaclret%(tail)s' % m.groupdict()) |
| return m |
| |
| def __replace_p2align(self, line): |
| """Replaces .p2align 4 with .p2align 5.""" |
| m = re.match(r'(?P<head>\s*\.p2align\s+)4(?P<tail>(;|\w).*)$', line) |
| if m: |
| self._result.append('%(head)s5%(tail)s' % m.groupdict()) |
| return m |
| |
| def _rewriter(self, line): |
| return (self.__replace_ret(line) or |
| self.__replace_p2align(line)) |
| |
| |
| def main(argv): |
| if len(argv) < 2: |
| print 'Usage: naclize_i686.py <file_name>' |
| return 1 |
| rewriter = Rewriter(argv[1]) |
| rewriter.rewrite() |
| rewriter.print_result() |
| return 0 |
| |
| |
| if __name__ == '__main__': |
| sys.exit(main(sys.argv)) |
