diff options
Diffstat (limited to 'newlib/libc/sys/linux/dl/dl-librecon.h')
| -rw-r--r-- | newlib/libc/sys/linux/dl/dl-librecon.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/newlib/libc/sys/linux/dl/dl-librecon.h b/newlib/libc/sys/linux/dl/dl-librecon.h new file mode 100644 index 000000000..3e39a32e6 --- /dev/null +++ b/newlib/libc/sys/linux/dl/dl-librecon.h @@ -0,0 +1,87 @@ +/* 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 */ |