reloc-macros.h revision 78828 
1/* Generic relocation support for BFD.
2   Copyright 1998, 1999, 2000 Free Software Foundation, Inc.
3
4   This file is part of BFD, the Binary File Descriptor library.
5
6   This program is free software; you can redistribute it and/or modify
7   it under the terms of the GNU General Public License as published by
8   the Free Software Foundation; either version 2 of the License, or
9   (at your option) any later version.
10
11   This program is distributed in the hope that it will be useful,
12   but WITHOUT ANY WARRANTY; without even the implied warranty of
13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14   GNU General Public License for more details.
15
16   You should have received a copy of the GNU General Public License
17   along with this program; if not, write to the Free Software Foundation,
18   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
19
20/* These macros are used by the various *.h target specific header
21   files to either generate an enum containing all the known relocations
22   for that target, or if RELOC_MACROS_GEN_FUNC is defined, a recognition
23   function is generated instead.  (This is used by binutils/readelf.c)
24
25   Given a header file like this:
26
27   	START_RELOC_NUMBERS (foo)
28   	    RELOC_NUMBER (R_foo_NONE,    0)
29   	    RELOC_NUMBER (R_foo_32,      1)
30   	    EMPTY_RELOC  (R_foo_good)
31   	    FAKE_RELOC   (R_foo_illegal, 9)
32   	END_RELOC_NUMBERS (R_foo_count)
33
34   Then the following will be produced by default (ie if
35   RELOC_MACROS_GEN_FUNC is *not* defined).
36
37   	enum foo
38	{
39   	  R_foo_NONE = 0,
40   	  R_foo_32 = 1,
41	  R_foo_good,
42   	  R_foo_illegal = 9,
43   	  R_foo_count
44   	};
45
46   If RELOC_MACROS_GEN_FUNC *is* defined, then instead the
47   following function will be generated:
48
49   	static const char * foo PARAMS ((unsigned long rtype));
50   	static const char *
51   	foo (rtype)
52   	    unsigned long rtype;
53   	{
54   	   switch (rtype)
55   	   {
56   	   case 0: return "R_foo_NONE";
57   	   case 1: return "R_foo_32";
58   	   default: return NULL;
59   	   }
60   	}
61   */
62
63#ifndef _RELOC_MACROS_H
64#define _RELOC_MACROS_H
65
66#ifdef RELOC_MACROS_GEN_FUNC
67
68/* This function takes the relocation number and returns the
69   string version name of the name of that relocation.  If
70   the relocation is not recognised, NULL is returned.  */
71
72#define START_RELOC_NUMBERS(name)   				\
73static const char * name    PARAMS ((unsigned long rtype)); 	\
74static const char *						\
75name (rtype)							\
76	unsigned long rtype;					\
77{								\
78  switch (rtype)						\
79  {
80
81#if defined (__STDC__) || defined (ALMOST_STDC)
82#define RELOC_NUMBER(name, number)  case number : return #name ;
83#else
84#define RELOC_NUMBER(name, number)  case number : return "name" ;
85#endif
86
87#define FAKE_RELOC(name, number)
88#define EMPTY_RELOC(name)
89
90#define END_RELOC_NUMBERS(name)	\
91    default: return NULL;	\
92  }				\
93}
94
95
96#else /* Default to generating enum.  */
97
98#define START_RELOC_NUMBERS(name)   enum name {
99#define RELOC_NUMBER(name, number)  name = number,
100#define FAKE_RELOC(name, number)    name = number,
101#define EMPTY_RELOC(name)           name,
102#define END_RELOC_NUMBERS(name)     name };
103
104#endif
105
106#endif /* RELOC_MACROS_H */
107