Zbigniew Jędrzejewski-Szmek
cb1f01a5f8
If the file was always generated on the fly, the header would be pointless. But since we distribute it, it should be there. C.f.a0e150b2f4. This was forgotten in35b42e5600.
120 lines
3.4 KiB
Python
120 lines
3.4 KiB
Python
#!/usr/bin/env python3
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# SPDX-License-Identifier: LGPL-2.1-or-later
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import sys
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import functools
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# We only generate numbers for a dozen or so syscalls
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SYSCALLS = [
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'bpf',
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'close_range',
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'copy_file_range',
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'getrandom',
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'memfd_create',
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'name_to_handle_at',
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'pidfd_open',
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'pidfd_send_signal',
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'pkey_mprotect',
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'renameat2',
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'setns',
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'statx']
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def dictify(f):
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def wrap(*args, **kwargs):
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return dict(f(*args, **kwargs))
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return functools.update_wrapper(wrap, f)
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@dictify
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def parse_syscall_table(filename):
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print(f'Reading {filename}…')
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for line in open(filename):
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items = line.split()
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if len(items) >= 2:
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yield items[0], int(items[1])
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def parse_syscall_tables(filenames):
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return {filename.split('-')[-1]: parse_syscall_table(filename)
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for filename in filenames}
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DEF_TEMPLATE = '''\
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#ifndef __IGNORE_{syscall}
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# if defined(__aarch64__)
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# define systemd_NR_{syscall} {nr_arm64}
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# elif defined(__alpha__)
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# define systemd_NR_{syscall} {nr_alpha}
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# elif defined(__arc__) || defined(__tilegx__)
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# define systemd_NR_{syscall} {nr_arc}
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# elif defined(__arm__)
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# define systemd_NR_{syscall} {nr_arm}
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# elif defined(__i386__)
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# define systemd_NR_{syscall} {nr_i386}
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# elif defined(__ia64__)
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# define systemd_NR_{syscall} {nr_ia64}
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# elif defined(__m68k__)
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# define systemd_NR_{syscall} {nr_m68k}
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# elif defined(_MIPS_SIM)
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# if _MIPS_SIM == _MIPS_SIM_ABI32
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# define systemd_NR_{syscall} {nr_mipso32}
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# elif _MIPS_SIM == _MIPS_SIM_NABI32
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# define systemd_NR_{syscall} {nr_mips64n32}
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# elif _MIPS_SIM == _MIPS_SIM_ABI64
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# define systemd_NR_{syscall} {nr_mips64}
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# else
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# error "Unknown MIPS ABI"
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# endif
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# elif defined(__powerpc__)
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# define systemd_NR_{syscall} {nr_powerpc}
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# elif defined(__s390__)
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# define systemd_NR_{syscall} {nr_s390}
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# elif defined(__sparc__)
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# define systemd_NR_{syscall} {nr_sparc}
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# elif defined(__x86_64__)
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# if defined(__ILP32__)
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# define systemd_NR_{syscall} ({nr_x86_64} | /* __X32_SYSCALL_BIT */ 0x40000000)
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# else
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# define systemd_NR_{syscall} {nr_x86_64}
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# endif
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# else
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# warning "{syscall}() syscall number is unknown for your architecture"
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# endif
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/* may be (invalid) negative number due to libseccomp, see PR 13319 */
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# if defined __NR_{syscall} && __NR_{syscall} >= 0
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# if defined systemd_NR_{syscall}
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assert_cc(__NR_{syscall} == systemd_NR_{syscall});
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# endif
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# else
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# if defined __NR_{syscall}
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# undef __NR_{syscall}
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# endif
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# if defined systemd_NR_{syscall} && systemd_NR_{syscall} >= 0
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# define __NR_{syscall} systemd_NR_{syscall}
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# endif
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# endif
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#endif
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'''
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def print_syscall_def(syscall, tables, out):
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mappings = {f'nr_{arch}':t.get(syscall, -1)
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for arch, t in tables.items()}
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print(DEF_TEMPLATE.format(syscall=syscall, **mappings),
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file=out)
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def print_syscall_defs(syscalls, tables, out):
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print('''\
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/* SPDX-License-Identifier: LGPL-2.1-or-later
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* This file is generated. Do not edit! */
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''' , file=out)
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for syscall in syscalls:
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print_syscall_def(syscall, tables, out)
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if __name__ == '__main__':
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output_file = sys.argv[1]
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arch_files = sys.argv[2:]
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out = open(output_file, 'wt')
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tables = parse_syscall_tables(arch_files)
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print_syscall_defs(SYSCALLS, tables, out)
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print(f'Wrote {output_file}')
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