117 lines
4.8 KiB
Python
117 lines
4.8 KiB
Python
#!/usr/bin/env python3
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import os
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import re
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import tempfile
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import subprocess
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import sys
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from typing import Iterable, Set, Tuple
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linux_path = '.'
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SIMPLE_MATH = re.compile('^[()+0-9a-fx\s]*$')
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NUMBER = re.compile('[0-9a-fx]+')
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def load_table(path: str, arches: Set[str]):
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with open('{}/{}'.format(linux_path, path)) as f:
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for line in f:
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line = line.strip()
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if line.startswith('#') or not line:
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continue
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nr, arch, name = line.split('\t', 4)[0:3]
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if arch in arches:
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yield (name, int(nr))
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def eval_expr(expr: str) -> int:
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if not SIMPLE_MATH.match(expr):
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raise Exception('"{}" looks like an expression, but not a supported one'.format(expr))
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return sum(int(x.group(0), 0) for x in NUMBER.finditer(expr))
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def load_headers(names: Iterable[Tuple[str, str]], arch: str, extra: str = ''):
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with tempfile.NamedTemporaryFile(mode='w+', suffix='.h') as f:
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with tempfile.TemporaryDirectory() as temp_include_dir:
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os.mkdir('{}/asm'.format(temp_include_dir))
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# Create empty asm/unistd-eabi.h and asm/unistd-common.h because
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# the ARM asm/unistd.h header needs them.
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with open('{}/asm/unistd-eabi.h'.format(temp_include_dir), 'w'):
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pass
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with open('{}/asm/unistd-common.h'.format(temp_include_dir), 'w'):
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pass
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with open('{}/asm/unistd_o32.h'.format(temp_include_dir), 'w'):
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pass
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with open('{}/asm/unistd_n64.h'.format(temp_include_dir), 'w'):
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pass
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with open('{}/asm/unistd_32.h'.format(temp_include_dir), 'w'):
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pass
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with open('{}/asm/unistd_64.h'.format(temp_include_dir), 'w'):
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pass
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f.write(extra)
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f.write('\n')
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f.write('#include <asm/unistd.h>\n')
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for prefix, name in names:
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if prefix is None:
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prefix = ''
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f.write('gen_nr {prefix}{name} __{prefix}NR_{name}\n'.format(prefix=prefix, name=name))
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f.flush()
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lines = subprocess.check_output(['gcc', '-nostdinc',
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'-I', '{}/arch/{}/include/uapi'.format(linux_path, arch),
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'-I', '{}/include/uapi'.format(linux_path),
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'-I', temp_include_dir,
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'-P', # don't include line number markers, which make the output annoying to parse
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'-E', # only preprocess, don't compile
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f.name]).decode('utf-8').split('\n')
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for line in lines:
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if not line.startswith('gen_nr '):
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continue
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_, name, nr = line.split(' ', 2)
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if nr.startswith('__'):
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# unsupported on this arch
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continue
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if nr.startswith('('):
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nr = eval_expr(nr)
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yield (name, int(nr))
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def main():
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RE_SYSCALL_NR=re.compile(r'\b__([A-Z]+_)?NR_([a-z0-9_]+)\b')
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names = set(x.groups() for x in RE_SYSCALL_NR.finditer(
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subprocess.check_output(['git', '--no-pager', 'grep', r'\<__\([A-Z]\+_\)\?NR_'], cwd=linux_path)
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.decode('utf-8')))
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if len(names) < 380:
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print("didn't find anywhere near enough syscalls; hack must have failed")
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subprocess.check_call(['git', '--no-pager', 'grep', r'\<__\([A-Z]\+_\)\?NR_'], cwd=linux_path)
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sys.exit(1)
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numbers = {
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'linux-aarch64': dict(load_headers(names, 'arm64')),
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'linux-armeabi': dict(list(load_table('arch/arm/tools/syscall.tbl', {'common', 'eabi'})) + list(load_headers(names, 'arm', '#define __ARM_EABI__'))),
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'linux-mips': dict(load_headers(names, 'mips',
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'#define _MIPS_SIM _MIPS_SIM_ABI32')),
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'linux-mips64': dict(load_headers(names, 'mips',
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'#define _MIPS_SIM _MIPS_SIM_ABI64')),
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'linux-powerpc': dict(load_headers(names, 'powerpc',
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'#undef __arch64__')),
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'linux-powerpc64': dict(load_headers(names, 'powerpc',
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'#define __arch64__ 1\n#define __powerpc64__')),
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'linux-riscv64': dict(load_headers(names, 'riscv')),
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'linux-sparc64': dict(load_headers(names, 'sparc')),
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'linux-x86': dict(load_table('arch/x86/entry/syscalls/syscall_32.tbl', {'i386'})),
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'linux-x86_64': dict(load_table('arch/x86/entry/syscalls/syscall_64.tbl', {'common', '64'})),
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}
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for arch, nums in numbers.items():
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if not nums:
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continue
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with open('../src/platform/{}/nr.rs'.format(arch), 'w') as f:
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f.write('/* automatically generated by nr_from_src.py */\n\n')
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for name, nr in sorted(nums.items()):
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f.write('pub const {}: usize = {};\n'.format(name.upper(), nr))
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if '__main__' == __name__:
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if len(sys.argv) > 1:
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linux_path = sys.argv[1]
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main()
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