include/libc-internal.h

   1 /* Copyright (C) 1991,92,93,95,96,97,98,99,2000,2001 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #ifndef _LIBC_INTERNAL_H
  20 #define _LIBC_INTERNAL_H 1
  21
  22 #include <features.h>
  23
  24 #ifdef __UCLIBC_BUILD_RELRO__
  25 # define attribute_relro __attribute__ ((section (".data.rel.ro")))
  26 #else
  27 # define attribute_relro
  28 #endif
  29
  30 #ifdef __UCLIBC_HAS_THREADS_NATIVE__
  31 # define attribute_tls_model_ie __attribute__ ((tls_model ("initial-exec")))
  32 #endif
  33
  34 /* Pull in things like __attribute_used__ */
  35 #include <sys/cdefs.h>
  36
  37 /* --- this is added to integrate linuxthreads */
  38 #define __USE_UNIX98            1
  39
  40 #ifndef __ASSEMBLER__
  41 # ifdef IS_IN_libc
  42
  43 #  define __need_size_t
  44 #  include <stddef.h>
  45
  46 /* sources are built w/ _GNU_SOURCE, this gets undefined */
  47 extern int __xpg_strerror_r (int __errnum, char *__buf, size_t __buflen);
  48 //extern char *__glibc_strerror_r (int __errnum, char *__buf, size_t __buflen);
  49
  50 /* #include <pthread.h> */
  51 #  ifndef __UCLIBC_HAS_THREADS__
  52 #   define __pthread_mutex_init(mutex, mutexattr)         ((void)0)
  53 #   define __pthread_mutex_lock(mutex)                    ((void)0)
  54 #   define __pthread_mutex_trylock(mutex)                 ((void)0)
  55 #   define __pthread_mutex_unlock(mutex)                  ((void)0)
  56 #  endif
  57
  58 /* internal access to program name */
  59 extern const char *__uclibc_progname attribute_hidden;
  60
  61 # endif /* IS_IN_libc */
  62
  63 /* #include <alloca.h> */
  64 #include <bits/stackinfo.h>
  65 #if _STACK_GROWS_DOWN
  66 # define extend_alloca(buf, len, newlen) \
  67   (__typeof (buf)) ({ size_t __newlen = (newlen);                             \
  68                       char *__newbuf = alloca (__newlen);                     \
  69                       if (__newbuf + __newlen == (char *) buf)                \
  70                         len += __newlen;                                      \
  71                       else                                                    \
  72                         len = __newlen;                                       \
  73                       __newbuf; })
  74 #elif _STACK_GROWS_UP
  75 # define extend_alloca(buf, len, newlen) \
  76   (__typeof (buf)) ({ size_t __newlen = (newlen);                             \
  77                       char *__newbuf = alloca (__newlen);                     \
  78                       char *__buf = (buf);                                    \
  79                       if (__buf + __newlen == __newbuf)                       \
  80                         {                                                     \
  81                           len += __newlen;                                    \
  82                           __newbuf = __buf;                                   \
  83                         }                                                     \
  84                       else                                                    \
  85                         len = __newlen;                                       \
  86                       __newbuf; })
  87 #else
  88 # warning unknown stack
  89 # define extend_alloca(buf, len, newlen) \
  90   alloca (((len) = (newlen)))
  91 #endif
  92
  93 #endif /* __ASSEMBLER__ */
  94
  95 #endif /* _LIBC_INTERNAL_H */