0,0 → 1,129 |
/* Generic relocation support for BFD. |
Copyright 1998, 1999, 2000, 2003, 2010, 2011 Free Software Foundation, Inc. |
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This file is part of BFD, the Binary File Descriptor library. |
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This program is free software; you can redistribute it and/or modify |
it under the terms of the GNU General Public License as published by |
the Free Software Foundation; either version 3 of the License, or |
(at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
but WITHOUT ANY WARRANTY; without even the implied warranty of |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
along with this program; if not, write to the Free Software Foundation, |
Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
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/* These macros are used by the various *.h target specific header |
files to either generate an enum containing all the known relocations |
for that target, or if RELOC_MACROS_GEN_FUNC is defined, a recognition |
function is generated instead. (This is used by binutils/readelf.c) |
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Given a header file like this: |
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START_RELOC_NUMBERS (foo) |
RELOC_NUMBER (R_foo_NONE, 0) |
RELOC_NUMBER (R_foo_32, 1) |
EMPTY_RELOC (R_foo_good) |
FAKE_RELOC (R_foo_illegal, 9) |
END_RELOC_NUMBERS (R_foo_count) |
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Then the following will be produced by default (ie if |
RELOC_MACROS_GEN_FUNC is *not* defined). |
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enum foo |
{ |
R_foo_NONE = 0, |
R_foo_32 = 1, |
R_foo_good, |
R_foo_illegal = 9, |
R_foo_count |
}; |
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Note: The value of the symbol defined in the END_RELOC_NUMBERS |
macro (R_foo_count in the case of the example above) will be |
set to the value of the whichever *_RELOC macro precedes it plus |
one. Therefore if you intend to use the symbol as a sentinel for |
the highest valid macro value you should make sure that the |
preceding *_RELOC macro is the highest valid number. ie a |
declaration like this: |
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START_RELOC_NUMBERS (foo) |
RELOC_NUMBER (R_foo_NONE, 0) |
RELOC_NUMBER (R_foo_32, 1) |
FAKE_RELOC (R_foo_illegal, 9) |
FAKE_RELOC (R_foo_synonym, 0) |
END_RELOC_NUMBERS (R_foo_count) |
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will result in R_foo_count having a value of 1 (R_foo_synonym + 1) |
rather than 10 or 2 as might be expected. |
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Alternatively you can assign a value to END_RELOC_NUMBERS symbol |
explicitly, like this: |
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START_RELOC_NUMBERS (foo) |
RELOC_NUMBER (R_foo_NONE, 0) |
RELOC_NUMBER (R_foo_32, 1) |
FAKE_RELOC (R_foo_illegal, 9) |
FAKE_RELOC (R_foo_synonym, 0) |
END_RELOC_NUMBERS (R_foo_count = 2) |
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If RELOC_MACROS_GEN_FUNC *is* defined, then instead the |
following function will be generated: |
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static const char *foo (unsigned long rtype); |
static const char * |
foo (unsigned long rtype) |
{ |
switch (rtype) |
{ |
case 0: return "R_foo_NONE"; |
case 1: return "R_foo_32"; |
default: return NULL; |
} |
} |
*/ |
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#ifndef _RELOC_MACROS_H |
#define _RELOC_MACROS_H |
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#ifdef RELOC_MACROS_GEN_FUNC |
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/* This function takes the relocation number and returns the |
string version name of the name of that relocation. If |
the relocation is not recognised, NULL is returned. */ |
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#define START_RELOC_NUMBERS(name) \ |
static const char *name (unsigned long rtype); \ |
static const char * \ |
name (unsigned long rtype) \ |
{ \ |
switch (rtype) \ |
{ |
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#define RELOC_NUMBER(name, number) \ |
case number: return #name; |
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#define FAKE_RELOC(name, number) |
#define EMPTY_RELOC(name) |
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#define END_RELOC_NUMBERS(name) \ |
default: return NULL; \ |
} \ |
} |
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#else /* Default to generating enum. */ |
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#define START_RELOC_NUMBERS(name) enum name { |
#define RELOC_NUMBER(name, number) name = number, |
#define FAKE_RELOC(name, number) name = number, |
#define EMPTY_RELOC(name) name, |
#define END_RELOC_NUMBERS(name) name }; |
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#endif |
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#endif /* _RELOC_MACROS_H */ |