arch/cris/include/asm/eshlibld.h

   1 /*!**************************************************************************
   2 *!
   3 *! FILE NAME  : eshlibld.h
   4 *!
   5 *! DESCRIPTION: Prototypes for exported shared library functions
   6 *!
   7 *! FUNCTIONS  : perform_cris_aout_relocations, shlibmod_fork, shlibmod_exit
   8 *! (EXPORTED)
   9 *!
  10 *!---------------------------------------------------------------------------
  11 *!
  12 *! (C) Copyright 1998, 1999 Axis Communications AB, LUND, SWEDEN
  13 *!
  14 *!**************************************************************************/
  15 /* $Id: eshlibld.h,v 1.2 2001/02/23 13:47:33 bjornw Exp $ */
  16
  17 #ifndef _cris_relocate_h
  18 #define _cris_relocate_h
  19
  20 /* Please note that this file is also compiled into the xsim simulator.
  21    Try to avoid breaking its double use (only works on a little-endian
  22    32-bit machine such as the i386 anyway).
  23
  24    Use __KERNEL__ when you're about to use kernel functions,
  25        (which you should not do here anyway, since this file is
  26        used by glibc).
  27    Use defined(__KERNEL__) || defined(__elinux__) when doing
  28        things that only makes sense on an elinux system.
  29    Use __CRIS__ when you're about to do (really) CRIS-specific code.
  30 */
  31
  32 /* We have dependencies all over the place for the host system
  33    for xsim being a linux system, so let's not pretend anything
  34    else with #ifdef:s here until fixed.  */
  35 #include <linux/limits.h>
  36
  37 /* Maybe do sanity checking if file input. */
  38 #undef SANITYCHECK_RELOC
  39
  40 /* Maybe output debug messages. */
  41 #undef RELOC_DEBUG
  42
  43 /* Maybe we want to share core as well as disk space.
  44    Mainly depends on the config macro CONFIG_SHARE_SHLIB_CORE, but it is
  45    assumed that we want to share code when debugging (exposes more
  46    trouble). */
  47 #ifndef SHARE_LIB_CORE
  48 # if (defined(__KERNEL__) || !defined(RELOC_DEBUG))
  49 #  define SHARE_LIB_CORE 0
  50 # else
  51 #  define SHARE_LIB_CORE 1
  52 # endif /* __KERNEL__ etc */
  53 #endif /* SHARE_LIB_CORE */
  54
  55
  56 /* Main exported function; supposed to be called when the program a.out
  57    has been read in. */
  58 extern int
  59 perform_cris_aout_relocations(unsigned long text, unsigned long tlength,
  60                               unsigned long data, unsigned long dlength,
  61                               unsigned long baddr, unsigned long blength,
  62
  63                               /* These may be zero when there's "perfect"
  64                                  position-independent code. */
  65                               unsigned char *trel, unsigned long tsrel,
  66                               unsigned long dsrel,
  67
  68                               /* These will be zero at a first try, to see
  69                                  if code is statically linked.  Else a
  70                                  second try, with the symbol table and
  71                                  string table nonzero should be done. */
  72                               unsigned char *symbols, unsigned long symlength,
  73                               unsigned char *strings, unsigned long stringlength,
  74
  75                               /* These will only be used when symbol table
  76                                information is present. */
  77                               char **env, int envc,
  78                               int euid, int is_suid);
  79
  80
  81 #ifdef RELOC_DEBUG
  82 /* Task-specific debug stuff. */
  83 struct task_reloc_debug {
  84         struct memdebug *alloclast;
  85         unsigned long alloc_total;
  86         unsigned long export_total;
  87 };
  88 #endif /* RELOC_DEBUG */
  89
  90 #if SHARE_LIB_CORE
  91
  92 /* When code (and some very specific data) is shared and not just
  93    dynamically linked, we need to export hooks for exec beginning and
  94    end. */
  95
  96 struct shlibdep;
  97
  98 extern void
  99 shlibmod_exit(struct shlibdep **deps);
 100
 101 /* Returns 0 if failure, nonzero for ok. */
 102 extern int
 103 shlibmod_fork(struct shlibdep **deps);
 104
 105 #else  /* ! SHARE_LIB_CORE */
 106 # define shlibmod_exit(x)
 107 # define shlibmod_fork(x) 1
 108 #endif /* ! SHARE_LIB_CORE */
 109
 110 #endif _cris_relocate_h
 111 /********************** END OF FILE eshlibld.h *****************************/
 112