diff options
Diffstat (limited to 'newlib/libc/sys/linux/dl/dl-osinfo.h')
| -rw-r--r-- | newlib/libc/sys/linux/dl/dl-osinfo.h | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/newlib/libc/sys/linux/dl/dl-osinfo.h b/newlib/libc/sys/linux/dl/dl-osinfo.h new file mode 100644 index 000000000..4976b3126 --- /dev/null +++ b/newlib/libc/sys/linux/dl/dl-osinfo.h @@ -0,0 +1,108 @@ +/* Operating system specific code for generic dynamic loader functions. + Copyright (C) 2000, 2001 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. */ + +#include <string.h> +#include <sys/sysctl.h> +#include <sys/utsname.h> +#include "kernel-features.h" + +#ifndef MIN +# define MIN(a,b) (((a)<(b))?(a):(b)) +#endif + +#ifdef SHARED +/* This is the function used in the dynamic linker to print the fatal error + message. */ +static inline void +__attribute__ ((__noreturn__)) +dl_fatal (const char *str) +{ + _dl_dprintf (2, str); + _exit (1); +} +#endif + + +#define DL_SYSDEP_OSCHECK(FATAL) \ + do { \ + /* Test whether the kernel is new enough. This test is only \ + performed if the library is not compiled to run on all \ + kernels. */ \ + if (__LINUX_KERNEL_VERSION > 0) \ + { \ + char bufmem[64]; \ + char *buf = bufmem; \ + unsigned int version; \ + int parts; \ + char *cp; \ + struct utsname uts; \ + \ + /* Try the uname syscall */ \ + if (__uname (&uts)) \ + { \ + /* This was not successful. Now try reading the /proc \ + filesystem. */ \ + ssize_t reslen; \ + int fd = __open ("/proc/sys/kernel/osrelease", O_RDONLY); \ + if (fd == -1 \ + || (reslen = __read (fd, bufmem, sizeof (bufmem))) <= 0) \ + /* This also didn't work. We give up since we cannot \ + make sure the library can actually work. */ \ + FATAL ("FATAL: cannot determine library version\n"); \ + __close (fd); \ + buf[MIN (reslen, (ssize_t) sizeof (bufmem) - 1)] = '\0'; \ + } \ + else \ + buf = uts.release; \ + \ + /* Now convert it into a number. The string consists of at most \ + three parts. */ \ + version = 0; \ + parts = 0; \ + cp = buf; \ + while ((*cp >= '0') && (*cp <= '9')) \ + { \ + unsigned int here = *cp++ - '0'; \ + \ + while ((*cp >= '0') && (*cp <= '9')) \ + { \ + here *= 10; \ + here += *cp++ - '0'; \ + } \ + \ + ++parts; \ + version <<= 8; \ + version |= here; \ + \ + if (*cp++ != '.') \ + /* Another part following? */ \ + break; \ + } \ + \ + if (parts < 3) \ + version <<= 8 * (3 - parts); \ + \ + /* Now we can test with the required version. */ \ + if (version < __LINUX_KERNEL_VERSION) \ + /* Not sufficent. */ \ + FATAL ("FATAL: kernel too old\n"); \ + \ + _dl_osversion = version; \ + } \ + } while (0) |