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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libc/] [sys/] [linux/] [dl/] [dl-librecon.h] - Rev 207
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/* Optional code to distinguish library flavours. Copyright (C) 1998, 2001 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998. 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. */ #ifndef _DL_LIBRECON_H #define _DL_LIBRECON_H 1 #define DISTINGUISH_LIB_VERSIONS \ do \ { \ /* We have to find out whether the binary is linked against \ libc 5 or glibc. We do this by looking at all the DT_NEEDED \ entries. If one is libc.so.5 this is a libc 5 linked binary. */ \ if (_dl_loaded->l_info[DT_NEEDED]) \ { \ /* We have dependencies. */ \ const ElfW(Dyn) *d; \ const char *strtab; \ \ strtab = (const char *) D_PTR (_dl_loaded, l_info[DT_STRTAB]); \ \ for (d = _dl_loaded->l_ld; d->d_tag != DT_NULL; ++d) \ if (d->d_tag == DT_NEEDED \ && strcmp (strtab + d->d_un.d_val, "libc.so.5") == 0) \ break; \ \ /* We print a `5' or `6' depending on the outcome. */ \ _dl_printf (d->d_tag != DT_NULL ? "5\n" : "6\n"); \ } \ } \ while (0) /* Recognizing extra environment variables. */ #define EXTRA_LD_ENVVARS \ case 13: \ if (memcmp (envline, "ASSUME_KERNEL", 13) == 0) \ { \ unsigned long int i, j, osversion = 0; \ char *p = &envline[14], *q; \ \ for (i = 0; i < 3; i++, p = q + 1) \ { \ j = __strtoul_internal (p, &q, 0, 0); \ if (j >= 255 || p == q || (i < 2 && *q && *q != '.')) \ { \ osversion = 0; \ break; \ } \ osversion |= j << (16 - 8 * i); \ if (!*q) \ break; \ } \ if (osversion) \ _dl_osversion = osversion; \ break; \ } \ \ case 15: \ if (memcmp (envline, "LIBRARY_VERSION", 15) == 0) \ { \ _dl_correct_cache_id = envline[16] == '5' ? 2 : 3; \ break; \ } /* Extra unsecure variables. The names are all stuffed in a single string which means they have to be terminated with a '\0' explicitly. */ #define EXTRA_UNSECURE_ENVVARS \ "LD_AOUT_LIBRARY_PATH\0" \ "LD_AOUT_PRELOAD\0" #endif /* dl-librecon.h */