arch/cris/include/asm/eshlibld.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*!**************************************************************************
   3 *!
   4 *! FILE NAME  : eshlibld.h
   5 *!
   6 *! DESCRIPTION: Prototypes for exported shared library functions
   7 *!
   8 *! FUNCTIONS  : perform_cris_aout_relocations, shlibmod_fork, shlibmod_exit
   9 *! (EXPORTED)
  10 *!
  11 *!---------------------------------------------------------------------------
  12 *!
  13 *! (C) Copyright 1998, 1999 Axis Communications AB, LUND, SWEDEN
  14 *!
  15 *!**************************************************************************/
  16 /* $Id: eshlibld.h,v 1.2 2001/02/23 13:47:33 bjornw Exp $ */
  17
  18 #ifndef _cris_relocate_h
  19 #define _cris_relocate_h
  20
  21 /* Please note that this file is also compiled into the xsim simulator.
  22    Try to avoid breaking its double use (only works on a little-endian
  23    32-bit machine such as the i386 anyway).
  24
  25    Use __KERNEL__ when you're about to use kernel functions,
  26        (which you should not do here anyway, since this file is
  27        used by glibc).
  28    Use defined(__KERNEL__) || defined(__elinux__) when doing
  29        things that only makes sense on an elinux system.
  30    Use __CRIS__ when you're about to do (really) CRIS-specific code.
  31 */
  32
  33 /* We have dependencies all over the place for the host system
  34    for xsim being a linux system, so let's not pretend anything
  35    else with #ifdef:s here until fixed.  */
  36 #include <linux/limits.h>
  37
  38 /* Maybe do sanity checking if file input. */
  39 #undef SANITYCHECK_RELOC
  40
  41 /* Maybe output debug messages. */
  42 #undef RELOC_DEBUG
  43
  44 /* Maybe we want to share core as well as disk space.
  45    Mainly depends on the config macro CONFIG_SHARE_SHLIB_CORE, but it is
  46    assumed that we want to share code when debugging (exposes more
  47    trouble). */
  48 #ifndef SHARE_LIB_CORE
  49 # if (defined(__KERNEL__) || !defined(RELOC_DEBUG))
  50 #  define SHARE_LIB_CORE 0
  51 # else
  52 #  define SHARE_LIB_CORE 1
  53 # endif /* __KERNEL__ etc */
  54 #endif /* SHARE_LIB_CORE */
  55
  56
  57 /* Main exported function; supposed to be called when the program a.out
  58    has been read in. */
  59 extern int
  60 perform_cris_aout_relocations(unsigned long text, unsigned long tlength,
  61                               unsigned long data, unsigned long dlength,
  62                               unsigned long baddr, unsigned long blength,
  63
  64                               /* These may be zero when there's "perfect"
  65                                  position-independent code. */
  66                               unsigned char *trel, unsigned long tsrel,
  67                               unsigned long dsrel,
  68
  69                               /* These will be zero at a first try, to see
  70                                  if code is statically linked.  Else a
  71                                  second try, with the symbol table and
  72                                  string table nonzero should be done. */
  73                               unsigned char *symbols, unsigned long symlength,
  74                               unsigned char *strings, unsigned long stringlength,
  75
  76                               /* These will only be used when symbol table
  77                                information is present. */
  78                               char **env, int envc,
  79                               int euid, int is_suid);
  80
  81
  82 #ifdef RELOC_DEBUG
  83 /* Task-specific debug stuff. */
  84 struct task_reloc_debug {
  85         struct memdebug *alloclast;
  86         unsigned long alloc_total;
  87         unsigned long export_total;
  88 };
  89 #endif /* RELOC_DEBUG */
  90
  91 #if SHARE_LIB_CORE
  92
  93 /* When code (and some very specific data) is shared and not just
  94    dynamically linked, we need to export hooks for exec beginning and
  95    end. */
  96
  97 struct shlibdep;
  98
  99 extern void
 100 shlibmod_exit(struct shlibdep **deps);
 101
 102 /* Returns 0 if failure, nonzero for ok. */
 103 extern int
 104 shlibmod_fork(struct shlibdep **deps);
 105
 106 #else  /* ! SHARE_LIB_CORE */
 107 # define shlibmod_exit(x)
 108 # define shlibmod_fork(x) 1
 109 #endif /* ! SHARE_LIB_CORE */
 110
 111 #endif _cris_relocate_h
 112 /********************** END OF FILE eshlibld.h *****************************/
 113