1 /* Copyright (C) 1999, 2000 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Andreas Jaeger <aj@suse.de>, 1999 and
4 Jakub Jelinek <jakub@redhat.com>, 1999.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Library General Public License as
8 published by the Free Software Foundation; either version 2 of the
9 License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Library General Public License for more details.
16 You should have received a copy of the GNU Library General Public
17 License along with the GNU C Library; see the file COPYING.LIB. If not,
18 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
21 /* The code in this file and in readelflib is a heavily simplified
22 version of the readelf program that's part of the current binutils
23 development version. Besides the simplification, it has also been
24 modified to read some other file formats. */
38 #include <gnu/lib-names.h>
42 #define Elf32_CLASS ELFCLASS32
43 #define Elf64_CLASS ELFCLASS64
51 static struct known_names interpreters
[] =
53 {"/lib/" LD_SO
, FLAG_ELF_LIBC6
},
54 {"/lib/ld-linux.so.1", FLAG_ELF_LIBC5
}
57 static struct known_names known_libs
[] =
60 {"libc.so.5", FLAG_ELF_LIBC5
},
61 {"libm.so.5", FLAG_ELF_LIBC5
},
63 {LIBC_SO
, FLAG_ELF_LIBC6
},
64 {LIBM_SO
, FLAG_ELF_LIBC6
}
69 /* Returns 0 if everything is ok, != 0 in case of error. */
71 process_file (const char *real_file_name
, const char *file_name
,
72 const char *lib
, int *flag
, char **soname
, int is_link
)
75 struct stat64 statbuf
;
79 ElfW(Ehdr
) *elf_header
;
80 struct exec
*aout_header
;
86 file
= fopen (real_file_name
, "rb");
89 /* No error for stale symlink. */
90 if (is_link
&& strstr (file_name
, ".so") != NULL
)
92 error (0, 0, _("Input file %s not found.\n"), file_name
);
96 if (fstat64 (fileno (file
), &statbuf
) < 0)
98 error (0, 0, _("Cannot fstat file %s.\n"), file_name
);
103 /* Check that the file is large enough so that we can access the
104 information. We're only checking the size of the headers here. */
105 if (statbuf
.st_size
< sizeof (struct exec
)
106 || statbuf
.st_size
< sizeof (ElfW(Ehdr
)))
108 error (0, 0, _("File %s is too small, not checked."), file_name
);
113 file_contents
= mmap (0, statbuf
.st_size
, PROT_READ
, MAP_SHARED
,
115 if (file_contents
== MAP_FAILED
)
117 error (0, 0, _("Cannot mmap file %s.\n"), file_name
);
122 /* First check if this is an aout file. */
123 aout_header
= (struct exec
*) file_contents
;
124 if (N_MAGIC (*aout_header
) == ZMAGIC
125 || N_MAGIC (*aout_header
) == QMAGIC
)
127 /* Aout files don't have a soname, just return the name
128 including the major number. */
129 char *copy
, *major
, *dot
;
130 copy
= xstrdup (lib
);
131 major
= strstr (copy
, ".so.");
134 dot
= strstr (major
+ 4, ".");
143 elf_header
= (ElfW(Ehdr
) *) file_contents
;
144 if (elf_header
->e_ident
[EI_MAG0
] != ELFMAG0
145 || elf_header
->e_ident
[EI_MAG1
] != ELFMAG1
146 || elf_header
->e_ident
[EI_MAG2
] != ELFMAG2
147 || elf_header
->e_ident
[EI_MAG3
] != ELFMAG3
)
149 /* The file is neither ELF nor aout. Check if it's a linker script,
150 like libc.so - otherwise complain. */
151 int len
= statbuf
.st_size
;
152 /* Only search the beginning of the file. */
155 if (memmem (file_contents
, len
, "GROUP", 5) == NULL
156 && memmem (file_contents
, len
, "GNU ld script", 13) == NULL
)
157 error (0, 0, _("%s is not an ELF file - it has the wrong magic bytes at the start.\n"),
163 if (process_elf_file (file_name
, lib
, flag
, soname
, file_contents
,
168 /* Clean up allocated memory and resources. */
169 munmap (file_contents
, statbuf
.st_size
);
175 /* Get architecture specific version of process_elf_file. */
176 #include "readelflib.c"