1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
#!/usr/bin/env python3
# SPDX-License-Identifier: LGPL-2.1-or-later
import sys
import functools
# We only generate numbers for a dozen or so syscalls
SYSCALLS = [
'bpf',
'close_range',
'copy_file_range',
'fchmodat2',
'getrandom',
'memfd_create',
'mount_setattr',
'move_mount',
'name_to_handle_at',
'open_tree',
'openat2',
'pidfd_open',
'pidfd_send_signal',
'pkey_mprotect',
'renameat2',
'setns',
'statx',
]
def dictify(f):
def wrap(*args, **kwargs):
return dict(f(*args, **kwargs))
return functools.update_wrapper(wrap, f)
@dictify
def parse_syscall_table(filename):
print(f'Reading {filename}…')
for line in open(filename):
items = line.split()
if len(items) >= 2:
yield items[0], int(items[1])
def parse_syscall_tables(filenames):
return {filename.split('-')[-1][:-4]: parse_syscall_table(filename)
for filename in filenames}
DEF_TEMPLATE_A = '''\
#ifndef __IGNORE_{syscall}
'''
DEF_TEMPLATE_B = '''\
# if defined(__aarch64__)
# define systemd_NR_{syscall} {nr_arm64}
# elif defined(__alpha__)
# define systemd_NR_{syscall} {nr_alpha}
# elif defined(__arc__) || defined(__tilegx__)
# define systemd_NR_{syscall} {nr_arc}
# elif defined(__arm__)
# define systemd_NR_{syscall} {nr_arm}
# elif defined(__i386__)
# define systemd_NR_{syscall} {nr_i386}
# elif defined(__ia64__)
# define systemd_NR_{syscall} {nr_ia64}
# elif defined(__loongarch_lp64)
# define systemd_NR_{syscall} {nr_loongarch64}
# elif defined(__m68k__)
# define systemd_NR_{syscall} {nr_m68k}
# elif defined(_MIPS_SIM)
# if _MIPS_SIM == _MIPS_SIM_ABI32
# define systemd_NR_{syscall} {nr_mipso32}
# elif _MIPS_SIM == _MIPS_SIM_NABI32
# define systemd_NR_{syscall} {nr_mips64n32}
# elif _MIPS_SIM == _MIPS_SIM_ABI64
# define systemd_NR_{syscall} {nr_mips64}
# else
# error "Unknown MIPS ABI"
# endif
# elif defined(__hppa__)
# define systemd_NR_{syscall} {nr_parisc}
# elif defined(__powerpc__)
# define systemd_NR_{syscall} {nr_powerpc}
# elif defined(__riscv)
# if __riscv_xlen == 32
# define systemd_NR_{syscall} {nr_riscv32}
# elif __riscv_xlen == 64
# define systemd_NR_{syscall} {nr_riscv64}
# else
# error "Unknown RISC-V ABI"
# endif
# elif defined(__s390__)
# define systemd_NR_{syscall} {nr_s390}
# elif defined(__sparc__)
# define systemd_NR_{syscall} {nr_sparc}
# elif defined(__x86_64__)
# if defined(__ILP32__)
# define systemd_NR_{syscall} ({nr_x86_64} | /* __X32_SYSCALL_BIT */ 0x40000000)
# else
# define systemd_NR_{syscall} {nr_x86_64}
# endif
# elif !defined(missing_arch_template)
%s
# endif
'''
DEF_TEMPLATE_C = '''\
/* may be an (invalid) negative number due to libseccomp, see PR 13319 */
# if defined __NR_{syscall} && __NR_{syscall} >= 0
# if defined systemd_NR_{syscall}
assert_cc(__NR_{syscall} == systemd_NR_{syscall});
# endif
# else
# if defined __NR_{syscall}
# undef __NR_{syscall}
# endif
# if defined systemd_NR_{syscall} && systemd_NR_{syscall} >= 0
# define __NR_{syscall} systemd_NR_{syscall}
# endif
# endif
#endif'''
DEF_TEMPLATE = (DEF_TEMPLATE_A +
DEF_TEMPLATE_B % '# warning "{syscall}() syscall number is unknown for your architecture"' +
DEF_TEMPLATE_C)
ARCH_CHECK = '''\
/* Note: if this code looks strange, this is because it is derived from the same
* template as the per-syscall blocks below. */
''' + '\n'.join(line for line in DEF_TEMPLATE_B.splitlines()
if ' define ' not in line) % '''\
# warning "Current architecture is missing from the template"
# define missing_arch_template 1'''
def print_syscall_def(syscall, tables, out):
mappings = {f'nr_{arch}':t.get(syscall, -1)
for arch, t in tables.items()}
print(DEF_TEMPLATE.format(syscall=syscall, **mappings),
file=out)
def print_syscall_defs(syscalls, tables, out):
print('''\
/* SPDX-License-Identifier: LGPL-2.1-or-later
* This file is generated by src/basic/missing_syscalls.py. Do not edit!
*
* Use 'ninja -C build update-syscall-tables' to download new syscall tables,
* and 'ninja -C build update-syscall-header' to regenerate this file.
*/
#pragma once
''',
file=out)
print(ARCH_CHECK, file=out)
for syscall in syscalls:
print_syscall_def(syscall, tables, out)
if __name__ == '__main__':
output_file = sys.argv[1]
arch_files = sys.argv[2:]
out = open(output_file, 'wt')
tables = parse_syscall_tables(arch_files)
print_syscall_defs(SYSCALLS, tables, out)
print(f'Wrote {output_file}')
|
