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authorUlrich Drepper <drepper@redhat.com>1999-12-04 08:00:00 +0000
committerUlrich Drepper <drepper@redhat.com>1999-12-04 08:00:00 +0000
commit591e1ffbf8db5e059b9bcf3bde6d7758f018a46d (patch)
treeb5e9db8cae0b20da5dfceb7c8e4bd91f84e3ac74 /elf/readlib.c
parent589328764d60283e16442c9c9dcf818346356776 (diff)
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Update.
1999-11-30 Andreas Jaeger <aj@suse.de> Add ldconfig: * elf/Makefile (extra-objs): Added ldconfig-modules. (ldconfig-modules): New. Added vpath for xstrdup and xmalloc. Check for use-ldconfig instead of has-ldconfig. ($(objpfx)ldconfig): New rule with dependencies. (distribute): Add new files. * sysdeps/unix/sysv/linux/sparc/readelflib.c: New file, developed together with Jakub Jelinek <jakub@redhat.com>. * sysdeps/generic/readelflib.c: Likewise. * elf/cache.c: New file. * elf/ldconfig.c: New file. * elf/ldconfig.h: New file. * elf/readlib.c: New file. * Makefile (install): Remove flag -d in ldconfig call. * configure.in: Rename has_ldconfig to use_ldconfig, set it to no by default. * config.make.in (has-ldconfig): Renamed to use-ldconfig, changed comment.
Diffstat (limited to 'elf/readlib.c')
-rw-r--r--elf/readlib.c160
1 files changed, 160 insertions, 0 deletions
diff --git a/elf/readlib.c b/elf/readlib.c
new file mode 100644
index 0000000..e6d0619
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+++ b/elf/readlib.c
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+/* Copyright (C) 1999 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Andreas Jaeger <aj@suse.de>, 1999 and
+ Jakub Jelinek <jakub@redhat.com>, 1999.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 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
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+/* The code in this file and in readelflib is a heavily simplified
+ version of the readelf program that's part of the current binutils
+ development version. Besides the simplification, it has also been
+ modified to read some other file formats. */
+
+
+#include <a.out.h>
+#include <elf.h>
+#include <error.h>
+#include <link.h>
+#include <libintl.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <sys/mman.h>
+#include <sys/stat.h>
+
+#include "ldconfig.h"
+
+#define Elf32_CLASS ELFCLASS32
+#define Elf64_CLASS ELFCLASS64
+
+struct known_names
+{
+ const char *soname;
+ int flag;
+};
+
+static struct known_names interpreters [] =
+{
+ {"/lib/ld-linux.so.2", FLAG_ELF_LIBC6},
+ {"/lib/ld-linux.so.1", FLAG_ELF_LIBC5}
+};
+
+static struct known_names known_libs [] =
+{
+ {"libc.so.6", FLAG_ELF_LIBC6},
+ {"libc.so.5", FLAG_ELF_LIBC5},
+ {"libm.so.6", FLAG_ELF_LIBC6},
+ {"libm.so.5", FLAG_ELF_LIBC5}
+};
+
+
+
+/* Returns 0 if everything is ok, != 0 in case of error. */
+int
+process_file (const char *file_name, const char *lib, int *flag, char **soname, int is_link)
+{
+ FILE *file;
+ struct stat statbuf;
+ void *file_contents;
+ int ret;
+
+ ElfW(Ehdr) *elf_header;
+ struct exec *aout_header;
+
+ ret = 0;
+ *flag = FLAG_ANY;
+ *soname = NULL;
+
+ file = fopen (file_name, "rb");
+ if (file == NULL)
+ {
+ /* No error for stale symlink. */
+ if (is_link && strstr (file_name, ".so.") != NULL)
+ return 1;
+ error (0, 0, _("Input file %s not found.\n"), file_name);
+ return 1;
+ }
+
+ if (fstat (fileno (file), &statbuf) < 0)
+ {
+ error (0, 0, _("Cannot fstat file %s.\n"), file_name);
+ return 1;
+ }
+
+ file_contents = mmap (0, statbuf.st_size, PROT_READ, MAP_SHARED, fileno (file), 0);
+ if (file_contents == MAP_FAILED)
+ {
+ error (0, 0, _("Cannot mmap file %s.\n"), file_name);
+ fclose (file);
+ return 1;
+ }
+
+ /* First check if this is an aout file. */
+ aout_header = (struct exec *) file_contents;
+ if (N_MAGIC (*aout_header) == ZMAGIC
+ || N_MAGIC (*aout_header) == QMAGIC)
+ {
+ /* Aout files don't have a soname, just return the the name
+ including the major number. */
+ char *copy, *major, *dot;
+ copy = xstrdup (lib);
+ major = strstr (copy, ".so.");
+ if (major)
+ {
+ dot = strstr (major + 4, ".");
+ if (dot)
+ *dot = '\0';
+ }
+ *soname = copy;
+ *flag = FLAG_LIBC4;
+ goto done;
+ }
+
+ elf_header = (ElfW(Ehdr) *) file_contents;
+ if (elf_header->e_ident [EI_MAG0] != ELFMAG0
+ || elf_header->e_ident [EI_MAG1] != ELFMAG1
+ || elf_header->e_ident [EI_MAG2] != ELFMAG2
+ || elf_header->e_ident [EI_MAG3] != ELFMAG3)
+ {
+ /* The file is neither ELF nor aout. Check if it's a linker script,
+ like libc.so - otherwise complain. */
+ int len = statbuf.st_size;
+ /* Only search the beginning of the file. */
+ if (len > 512)
+ len = 512;
+ if (memmem (file_contents, len, "GROUP", 5) == NULL
+ && memmem (file_contents, len, "GNU ld script", 13) == NULL)
+ error (0, 0, _("%s is not an ELF file - it has the wrong magic bytes at the start.\n"),
+ file_name);
+ ret = 1;
+ goto done;
+ }
+
+ if (process_elf_file (file_name, lib, flag, soname, file_contents))
+ ret = 1;
+
+ done:
+ /* Clean up allocated memory and resources. */
+ munmap (file_contents, statbuf.st_size);
+ fclose (file);
+
+ return ret;
+}
+
+/* Get architecture specific version of process_elf_file. */
+#include "readelflib.c"
+