You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
74 lines
2.2 KiB
74 lines
2.2 KiB
/* Conversion functions for versioning information. |
|
Copyright (C) 2006, 2007 Red Hat, Inc. |
|
This file is part of elfutils. |
|
Written by Ulrich Drepper <drepper@redhat.com>, 2006. |
|
|
|
This file is free software; you can redistribute it and/or modify |
|
it under the terms of either |
|
|
|
* the GNU Lesser General Public License as published by the Free |
|
Software Foundation; either version 3 of the License, or (at |
|
your option) any later version |
|
|
|
or |
|
|
|
* the GNU General Public License as published by the Free |
|
Software Foundation; either version 2 of the License, or (at |
|
your option) any later version |
|
|
|
or both in parallel, as here. |
|
|
|
elfutils 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 |
|
General Public License for more details. |
|
|
|
You should have received copies of the GNU General Public License and |
|
the GNU Lesser General Public License along with this program. If |
|
not, see <http://www.gnu.org/licenses/>. */ |
|
|
|
#include <assert.h> |
|
#include <gelf.h> |
|
|
|
#include "libelfP.h" |
|
|
|
|
|
static void |
|
elf_cvt_gnuhash (void *dest, const void *src, size_t len, int encode) |
|
{ |
|
/* The GNU hash table format on 64 bit machines mixes 32 bit and 64 bit |
|
words. We must detangle them here. */ |
|
Elf32_Word *dest32 = dest; |
|
const Elf32_Word *src32 = src; |
|
|
|
/* First four control words, 32 bits. */ |
|
for (unsigned int cnt = 0; cnt < 4; ++cnt) |
|
{ |
|
if (len < 4) |
|
return; |
|
dest32[cnt] = bswap_32 (src32[cnt]); |
|
len -= 4; |
|
} |
|
|
|
Elf32_Word bitmask_words = encode ? src32[2] : dest32[2]; |
|
|
|
/* Now the 64 bit words. */ |
|
Elf64_Xword *dest64 = (Elf64_Xword *) &dest32[4]; |
|
const Elf64_Xword *src64 = (const Elf64_Xword *) &src32[4]; |
|
for (unsigned int cnt = 0; cnt < bitmask_words; ++cnt) |
|
{ |
|
if (len < 8) |
|
return; |
|
dest64[cnt] = bswap_64 (src64[cnt]); |
|
len -= 8; |
|
} |
|
|
|
/* The rest are 32 bit words again. */ |
|
src32 = (const Elf32_Word *) &src64[bitmask_words]; |
|
dest32 = (Elf32_Word *) &dest64[bitmask_words]; |
|
while (len >= 4) |
|
{ |
|
*dest32++ = bswap_32 (*src32++); |
|
len -= 4; |
|
} |
|
}
|
|
|