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