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36dd637f NC |
1 | /* Generic relocation support for BFD. |
2 | Copyright (C) 1998 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 elf/*.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 | FAKE_RELOC (R_foo_illegal, 2) | |
31 | EMPTY_RELOC (R_foo_max) | |
32 | END_RELOC_NUMBERS | |
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 | R_foo_NONE = 0, | |
39 | R_foo_32 = 1, | |
40 | R_foo_illegal = 2, | |
41 | R_foo_max | |
42 | }; | |
43 | ||
44 | If RELOC_MACROS_GEN_FUNC *is* defined, then instead the | |
45 | following function will be generated: | |
46 | ||
47 | static char * foo PARAMS ((unsigned long rtype)); | |
48 | static char * | |
49 | foo (rtype) | |
50 | unsigned long rtype; | |
51 | { | |
52 | switch (rtype) | |
53 | { | |
54 | case 0: return "R_foo_NONE"; | |
55 | case 1: return "R_foo_32"; | |
56 | default: return NULL; | |
57 | } | |
58 | } | |
59 | */ | |
60 | ||
61 | #ifndef _RELOC_MACROS_H | |
62 | #define _RELOC_MACROS_H | |
63 | ||
64 | #ifdef RELOC_MACROS_GEN_FUNC | |
65 | ||
66 | /* This function takes the relocation number and returns the | |
67 | string version name of the name of that relocation. If | |
68 | the relocation is not recognised, NULL is returned. */ | |
69 | ||
70 | #define START_RELOC_NUMBERS(name) \ | |
71 | static const char * name PARAMS ((unsigned long rtype)); \ | |
72 | static const char * \ | |
73 | name (rtype) \ | |
74 | unsigned long rtype; \ | |
75 | { \ | |
76 | switch (rtype) \ | |
77 | { | |
78 | ||
79 | #ifdef __STDC__ | |
80 | #define RELOC_NUMBER(name, number) case number : return #name ; | |
81 | #else | |
82 | #define RELOC_NUMBER(name, number) case number : return "name" ; | |
83 | #endif | |
84 | ||
85 | #define FAKE_RELOC(name, number) | |
86 | #define EMPTY_RELOC(name) | |
87 | ||
88 | #define END_RELOC_NUMBERS default: return NULL; \ | |
89 | } \ | |
90 | } | |
91 | ||
92 | ||
93 | #else /* default to generating enum */ | |
94 | ||
95 | #define START_RELOC_NUMBERS(name) enum name { | |
96 | #define RELOC_NUMBER(name, number) name = number , | |
97 | #define FAKE_RELOC(name, number) name = number , | |
98 | #define EMPTY_RELOC(name) name , | |
99 | #define END_RELOC_NUMBERS }; | |
100 | ||
101 | #endif | |
102 | ||
103 | #endif /* RELOC_MACROS_H */ |