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eshlibld.h
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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  && !defined(CONFIG_SHARE_SHLIB_CORE)
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