mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-08 14:20:07 +00:00
121 lines
4.5 KiB
Python
121 lines
4.5 KiB
Python
#!/usr/bin/python3
|
|
# Produce headers of assembly constants from C expressions.
|
|
# Copyright (C) 2018-2024 Free Software Foundation, Inc.
|
|
# This file is part of the GNU C Library.
|
|
#
|
|
# The GNU C Library is free software; you can redistribute it and/or
|
|
# modify it under the terms of the GNU Lesser General Public
|
|
# License as published by the Free Software Foundation; either
|
|
# version 2.1 of the License, or (at your option) any later version.
|
|
#
|
|
# The GNU C Library is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
# Lesser General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU Lesser General Public
|
|
# License along with the GNU C Library; if not, see
|
|
# <https://www.gnu.org/licenses/>.
|
|
|
|
# The input to this script looks like:
|
|
# #cpp-directive ...
|
|
# NAME1
|
|
# NAME2 expression ...
|
|
# A line giving just a name implies an expression consisting of just that name.
|
|
|
|
import argparse
|
|
|
|
import glibcextract
|
|
|
|
|
|
def gen_test(sym_data):
|
|
"""Generate a test for the values of some C constants.
|
|
|
|
The first argument is as for glibcextract.compute_c_consts.
|
|
|
|
"""
|
|
out_lines = []
|
|
for arg in sym_data:
|
|
if isinstance(arg, str):
|
|
if arg == 'START':
|
|
out_lines.append('#include <stdint.h>\n'
|
|
'#include <stdio.h>\n'
|
|
'#include <bits/wordsize.h>\n'
|
|
'#if __WORDSIZE == 64\n'
|
|
'typedef uint64_t c_t;\n'
|
|
'# define U(n) UINT64_C (n)\n'
|
|
'#else\n'
|
|
'typedef uint32_t c_t;\n'
|
|
'# define U(n) UINT32_C (n)\n'
|
|
'#endif\n'
|
|
'static int\n'
|
|
'do_test (void)\n'
|
|
'{\n'
|
|
# Compilation test only, using static
|
|
# assertions.
|
|
' return 0;\n'
|
|
'}\n'
|
|
'#include <support/test-driver.c>')
|
|
else:
|
|
out_lines.append(arg)
|
|
continue
|
|
name = arg[0]
|
|
value = arg[1]
|
|
out_lines.append('_Static_assert (U (asconst_%s) == (c_t) (%s), '
|
|
'"value of %s");'
|
|
% (name, value, name))
|
|
return '\n'.join(out_lines)
|
|
|
|
|
|
def main():
|
|
"""The main entry point."""
|
|
parser = argparse.ArgumentParser(
|
|
description='Produce headers of assembly constants.')
|
|
parser.add_argument('--cc', metavar='CC',
|
|
help='C compiler (including options) to use')
|
|
parser.add_argument('--test', action='store_true',
|
|
help='Generate test case instead of header')
|
|
parser.add_argument('--python', action='store_true',
|
|
help='Generate Python file instead of header')
|
|
parser.add_argument('sym_file',
|
|
help='.sym file to process')
|
|
args = parser.parse_args()
|
|
sym_data = []
|
|
with open(args.sym_file, 'r') as sym_file:
|
|
started = False
|
|
for line in sym_file:
|
|
line = line.strip()
|
|
if line == '':
|
|
continue
|
|
# Pass preprocessor directives through.
|
|
if line.startswith('#'):
|
|
sym_data.append(line)
|
|
continue
|
|
words = line.split(maxsplit=1)
|
|
if not started:
|
|
sym_data.append('START')
|
|
started = True
|
|
# Separator.
|
|
if words[0] == '--':
|
|
continue
|
|
name = words[0]
|
|
value = words[1] if len(words) > 1 else words[0]
|
|
sym_data.append((name, value))
|
|
if not started:
|
|
sym_data.append('START')
|
|
if args.test:
|
|
print(gen_test(sym_data))
|
|
elif args.python:
|
|
consts = glibcextract.compute_c_consts(sym_data, args.cc)
|
|
print('# GENERATED FILE\n'
|
|
'\n'
|
|
'# Constant definitions.\n'
|
|
'# See gen-as-const.py for details.\n')
|
|
print(''.join('%s = %s\n' % c for c in sorted(consts.items())), end='')
|
|
else:
|
|
consts = glibcextract.compute_c_consts(sym_data, args.cc)
|
|
print(''.join('#define %s %s\n' % c for c in sorted(consts.items())), end='')
|
|
|
|
if __name__ == '__main__':
|
|
main()
|