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
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
|
/* Set flags signalling availability of kernel features based on given
kernel version number.
Copyright (C) 1999, 2000, 2001, 2002 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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
/* This file must not contain any C code. At least it must be protected
to allow using the file also in assembler files. */
#ifndef __LINUX_KERNEL_VERSION
/* We assume the worst; all kernels should be supported. */
# define __LINUX_KERNEL_VERSION 0
#endif
/* We assume for __LINUX_KERNEL_VERSION the same encoding used in
linux/version.h. I.e., the major, minor, and subminor all get a
byte with the major number being in the highest byte. This means
we can do numeric comparisons.
In the following we will define certain symbols depending on
whether the describes kernel feature is available in the kernel
version given by __LINUX_KERNEL_VERSION. We are not always exactly
recording the correct versions in which the features were
introduced. If somebody cares these values can afterwards be
corrected. Most of the numbers here are set corresponding to
2.2.0. */
/* `getcwd' system call. */
#if __LINUX_KERNEL_VERSION >= 131584
# define __ASSUME_GETCWD_SYSCALL 1
#endif
/* Real-time signal became usable in 2.1.70. */
#if __LINUX_KERNEL_VERSION >= 131398
# define __ASSUME_REALTIME_SIGNALS 1
#endif
/* When were the `pread'/`pwrite' syscalls introduced? */
#if __LINUX_KERNEL_VERSION >= 131584
# define __ASSUME_PREAD_SYSCALL 1
# define __ASSUME_PWRITE_SYSCALL 1
#endif
/* When was `poll' introduced? */
#if __LINUX_KERNEL_VERSION >= 131584
# define __ASSUME_POLL_SYSCALL 1
#endif
/* The `lchown' syscall was introduced in 2.1.80. */
#if __LINUX_KERNEL_VERSION >= 131408
# define __ASSUME_LCHOWN_SYSCALL 1
#endif
/* When did the `setresuid' sysall became available? */
#if __LINUX_KERNEL_VERSION >= 131584 && !defined __sparc__
# define __ASSUME_SETRESUID_SYSCALL 1
#endif
/* The SIOCGIFNAME ioctl is available starting with 2.1.50. */
#if __LINUX_KERNEL_VERSION >= 131408
# define __ASSUME_SIOCGIFNAME 1
#endif
/* On x86 another `getrlimit' syscall was added in 2.3.25. */
#if __LINUX_KERNEL_VERSION >= 131865 && defined __i386__
# define __ASSUME_NEW_GETRLIMIT_SYSCALL 1
#endif
/* On x86 the truncate64/ftruncate64 syscalls were introduced in 2.3.31. */
#if __LINUX_KERNEL_VERSION >= 131871 && defined __i386__
# define __ASSUME_TRUNCATE64_SYSCALL 1
#endif
/* On x86 the mmap2 syscall was introduced in 2.3.31. */
#if __LINUX_KERNEL_VERSION >= 131871 && defined __i386__
# define __ASSUME_MMAP2_SYSCALL 1
#endif
/* On x86 the stat64/lstat64/fstat64 syscalls were introduced in 2.3.34. */
#if __LINUX_KERNEL_VERSION >= 131874 && defined __i386__
# define __ASSUME_STAT64_SYSCALL 1
#endif
/* On sparc and ARM the truncate64/ftruncate64/mmap2/stat64/lstat64/fstat64
syscalls were introduced in 2.3.35. */
#if __LINUX_KERNEL_VERSION >= 131875 && (defined __sparc__ || defined __arm__)
# define __ASSUME_TRUNCATE64_SYSCALL 1
# define __ASSUME_MMAP2_SYSCALL 1
# define __ASSUME_STAT64_SYSCALL 1
#endif
/* I know for sure that these are in 2.3.35 on powerpc. */
#if __LINUX_KERNEL_VERSION >= 131875 && defined __powerpc__
# define __ASSUME_TRUNCATE64_SYSCALL 1
# define __ASSUME_STAT64_SYSCALL 1
# define __ASSUME_NEW_GETRLIMIT_SYSCALL 1
#endif
/* Linux 2.3.39 introduced 32bit UID/GIDs and IPC64. Some platforms had 32
bit type all along. */
#if __LINUX_KERNEL_VERSION >= 131879 || defined __powerpc__ || defined __mips__
# define __ASSUME_32BITUIDS 1
# ifndef __powerpc__
# define __ASSUME_IPC64 1
# endif
# ifdef __sparc__
# define __ASSUME_SETRESUID_SYSCALL 1
# endif
#endif
/* Linux 2.4.0 on PPC introduced a correct IPC64. */
#if __LINUX_KERNEL_VERSION >= 132096 && defined __powerpc__
# define __ASSUME_IPC64 1
#endif
/* We can use the LDTs for threading with Linux 2.3.99 and newer. */
#if __LINUX_KERNEL_VERSION >= 131939
# define __ASSUME_LDT_WORKS 1
#endif
/* The changed st_ino field appeared in 2.4.0-test6. But we cannot
distinguish this version from other 2.4.0 releases. Therefore play
save and assume it available is for 2.4.1 and up. */
#if __LINUX_KERNEL_VERSION >= 132097
# define __ASSUME_ST_INO_64_BIT 1
#endif
/* To support locking of large files a new fcntl() syscall was introduced
in 2.4.0-test7. We test for 2.4.1 for the earliest version we know
the syscall is available. */
#if __LINUX_KERNEL_VERSION >= 132097 && (defined __i386__ || defined __sparc__)
# define __ASSUME_FCNTL64 1
#endif
/* Arm got fcntl64 in 2.4.4, PowerPC and SH have it also in 2.4.4 (I
don't know when it got introduced). */
#if __LINUX_KERNEL_VERSION >= 132100 \
&& (defined __arm__ || defined __powerpc__ || defined __sh__)
# define __ASSUME_FCNTL64 1
#endif
/* The getdents64 syscall was introduced in 2.4.0-test7. We test for
2.4.1 for the earliest version we know the syscall is available. */
#if __LINUX_KERNEL_VERSION >= 132097
# define __ASSUME_GETDENTS64_SYSCALL 1
#endif
/* When did O_DIRECTORY became available? Early in 2.3 but when?
Be safe, use 2.3.99. */
#if __LINUX_KERNEL_VERSION >= 131939
# define __ASSUME_O_DIRECTORY 1
#endif
/* Starting with one of the 2.4.0 pre-releases the Linux kernel passes
up the page size information. */
#if __LINUX_KERNEL_VERSION >= 132097
# define __ASSUME_AT_PAGESIZE 1
#endif
/* Starting with at least 2.4.0 the kernel passes the uid/gid unconditionally
up to the child. */
#if __LINUX_KERNEL_VERSION >= 132097
# define __ASSUME_AT_XID 1
#endif
/* Starting with 2.4.5 kernels PPC passes the AUXV in the standard way
and the mmap2 syscall made it into the official kernel. */
#if __LINUX_KERNEL_VERSION >= (132096+5) && defined __powerpc__
# define __ASSUME_STD_AUXV 1
# define __ASSUME_MMAP2_SYSCALL 1
#endif
/* On x86, the set_thread_area syscall was introduced in 2.5.29, but its
semantics was changed in 2.5.30, and again after 2.3.31. */
#if __LINUX_KERNEL_VERSION >= 132384 && defined __i386__
# define __ASSUME_SET_THREAD_AREA_SYSCALL 1
#endif
/* There are an infinite number of PA-RISC kernel versions numbered
2.4.0. But they've not really been released as such. We require
and expect the final version here. */
#ifdef __hppa__
# define __ASSUME_32BITUIDS 1
# define __ASSUME_TRUNCATE64_SYSCALL 1
# define __ASSUME_MMAP2_SYSCALL 1
# define __ASSUME_STAT64_SYSCALL 1
# define __ASSUME_IPC64 1
# define __ASSUME_ST_INO_64_BIT 1
# define __ASSUME_FCNTL64 1
# define __ASSUME_GETDENTS64_SYSCALL 1
#endif
|
