1 /* Operating system specific code for generic dynamic loader functions.
2 Copyright (C) 2000, 2001, 2002 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
21 #include <sys/sysctl.h>
22 #include <sys/utsname.h>
23 #include "kernel-features.h"
26 # define MIN(a,b) (((a)<(b))?(a):(b))
30 /* This is the function used in the dynamic linker to print the fatal error
33 __attribute__ ((__noreturn__
))
34 dl_fatal (const char *str
)
42 #define DL_SYSDEP_OSCHECK(FATAL) \
44 /* Test whether the kernel is new enough. This test is only \
45 performed if the library is not compiled to run on all \
47 if (__LINUX_KERNEL_VERSION > 0) \
51 unsigned int version; \
56 /* Try the uname syscall */ \
59 /* This was not successful. Now try reading the /proc \
62 int fd = __open ("/proc/sys/kernel/osrelease", O_RDONLY); \
64 || (reslen = __read (fd, bufmem, sizeof (bufmem))) <= 0) \
65 /* This also didn't work. We give up since we cannot \
66 make sure the library can actually work. */ \
67 FATAL ("FATAL: cannot determine library version\n"); \
69 buf[MIN (reslen, (ssize_t) sizeof (bufmem) - 1)] = '\0'; \
74 /* Now convert it into a number. The string consists of at most \
79 while ((*cp >= '0') && (*cp <= '9')) \
81 unsigned int here = *cp++ - '0'; \
83 while ((*cp >= '0') && (*cp <= '9')) \
86 here += *cp++ - '0'; \
94 /* Another part following? */ \
99 version <<= 8 * (3 - parts); \
101 /* Now we can test with the required version. */ \
102 if (version < __LINUX_KERNEL_VERSION) \
103 /* Not sufficent. */ \
104 FATAL ("FATAL: kernel too old\n"); \
106 GL(dl_osversion) = version; \