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2001-03-12 Jakub Jelinek <jakub@redhat.com> * csu/Makefile (abi-tag.h): Define OS and version separately, allow version to be overriden from config.h. * csu/abi-note.S: Use OS and version separately, include config.h. * elf/dl-load.c (_dl_osversion): New. (_dl_map_object_from_fd): Kill some warnings. (open_verify): Check .note.ABI-tag of the library if present. * elf/Makefile (CPPFLAGS-dl-load.c): Add -I$(csu-objpfx). * elf/cache.c (struct cache_entry): Add osversion. (print_entry): Print osversion. (print_cache): Pass osversion to it. (compare): Sort according to osversion. (save_cache): Set osversion. (add_to_cache): Add osversion argument. * sysdeps/generic/ldconfig.h (add_to_cache, process_file, process_elf_file): Add osversion argument. * elf/readlib.c (process_file): Likewise. * sysdeps/generic/readelflib.c (process_elf_file): Likewise. * sysdeps/unix/sysv/linux/ia64/readelflib.c (process_elf_file, process_elf32_file, process_elf64_file): Likewise. * sysdeps/unix/sysv/linux/i386/readelflib.c (process_elf_file, process_elf32_file, process_elf64_file): Likewise. * sysdeps/unix/sysv/linux/sparc/readelflib.c (process_elf_file, process_elf32_file, process_elf64_file): Likewise. * elf/ldconfig.c (manual_link): Pass it. (search_dir): Issue diagnostic if two libs with the same soname in the same directory have different .note.ABI-tag. Record osversion in dlib_entry and use it from there. (struct lib_entry): Remove. (struct dlib_entry): Add osversion. * sysdeps/generic/dl-cache.c (_dl_load_cache_lookup): Check osversion. * sysdeps/generic/dl-cache.h (struct file_entry_new): Replace __unused field with osversion. * sysdeps/generic/ldsodefs.h (_dl_osversion): Declare. * sysdeps/unix/sysv/linux/init-first.c: Include ldsodefs.h. * sysdeps/unix/sysv/linux/dl-osinfo.h (DL_SYSDEP_OSCHECK): Save kernel version in _dl_osversion. * sysdeps/unix/sysv/linux/configure.in: Define __ABI_TAG_VERSION. * Makerules (build-shlib-helper, build-module-helper): New. (build-shlib, build-module-helper): Make sure .note.ABI-tag comes early. * config.h.in (__ABI_TAG_VERSION): Add. * elf/dl-minimal.c (__strtoul_internal): Set endptr on return. * sysdeps/unix/sysv/linux/i386/dl-librecon.h (EXTRA_LD_ENVVARS): Handle LD_ASSUME_KERNEL. * sysdeps/unix/sysv/linux/dl-librecon.h: New.
109 lines
3.7 KiB
C
109 lines
3.7 KiB
C
/* Operating system specific code for generic dynamic loader functions.
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Copyright (C) 2000, 2001 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <string.h>
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#include <sys/sysctl.h>
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#include <sys/utsname.h>
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#include "kernel-features.h"
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#ifndef MIN
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# define MIN(a,b) (((a)<(b))?(a):(b))
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#endif
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#ifdef SHARED
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/* This is the function used in the dynamic linker to print the fatal error
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message. */
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static inline void
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__attribute__ ((__noreturn__))
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dl_fatal (const char *str)
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{
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_dl_dprintf (2, str);
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_exit (1);
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}
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#endif
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#define DL_SYSDEP_OSCHECK(FATAL) \
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do { \
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/* Test whether the kernel is new enough. This test is only \
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performed if the library is not compiled to run on all \
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kernels. */ \
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if (__LINUX_KERNEL_VERSION > 0) \
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{ \
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char bufmem[64]; \
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char *buf = bufmem; \
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unsigned int version; \
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int parts; \
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char *cp; \
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struct utsname uts; \
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\
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/* Try the uname syscall */ \
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if (__uname (&uts)) \
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{ \
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/* This was not successful. Now try reading the /proc \
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filesystem. */ \
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ssize_t reslen; \
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int fd = __open ("/proc/sys/kernel/osrelease", O_RDONLY); \
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if (fd == -1 \
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|| (reslen = __read (fd, bufmem, sizeof (bufmem))) <= 0) \
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/* This also didn't work. We give up since we cannot \
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make sure the library can actually work. */ \
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FATAL ("FATAL: cannot determine library version\n"); \
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__close (fd); \
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buf[MIN (reslen, (ssize_t) sizeof (bufmem) - 1)] = '\0'; \
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} \
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else \
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buf = uts.release; \
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\
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/* Now convert it into a number. The string consists of at most \
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three parts. */ \
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version = 0; \
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parts = 0; \
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cp = buf; \
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while ((*cp >= '0') && (*cp <= '9')) \
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{ \
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unsigned int here = *cp++ - '0'; \
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\
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while ((*cp >= '0') && (*cp <= '9')) \
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{ \
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here *= 10; \
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here += *cp++ - '0'; \
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} \
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\
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++parts; \
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version <<= 8; \
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version |= here; \
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\
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if (*cp++ != '.') \
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/* Another part following? */ \
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break; \
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} \
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\
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if (parts < 3) \
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version <<= 8 * (3 - parts); \
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\
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/* Now we can test with the required version. */ \
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if (version < __LINUX_KERNEL_VERSION) \
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/* Not sufficent. */ \
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FATAL ("FATAL: kernel too old\n"); \
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\
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_dl_osversion = version; \
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} \
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} while (0)
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