mirror of
https://github.com/darlinghq/darling-gdb.git
synced 2024-12-16 16:47:52 +00:00
130 lines
4.0 KiB
C
130 lines
4.0 KiB
C
/* Generic relocation support for BFD.
|
|
Copyright 1998, 1999, 2000, 2003, 2010 Free Software Foundation, Inc.
|
|
|
|
This file is part of BFD, the Binary File Descriptor library.
|
|
|
|
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.
|
|
|
|
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.
|
|
|
|
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. */
|
|
|
|
/* 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)
|
|
|
|
Given a header file like this:
|
|
|
|
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)
|
|
|
|
Then the following will be produced by default (ie if
|
|
RELOC_MACROS_GEN_FUNC is *not* defined).
|
|
|
|
enum foo
|
|
{
|
|
R_foo_NONE = 0,
|
|
R_foo_32 = 1,
|
|
R_foo_good,
|
|
R_foo_illegal = 9,
|
|
R_foo_count
|
|
};
|
|
|
|
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 preceeds 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
|
|
preceeding *_RELOC macro is the highest valid number. ie a
|
|
declaration like this:
|
|
|
|
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)
|
|
|
|
will result in R_foo_count having a value of 1 (R_foo_synonym + 1)
|
|
rather than 10 or 2 as might be expected.
|
|
|
|
Alternatively you can assign a value to END_RELOC_NUMBERS symbol
|
|
explicitly, like this:
|
|
|
|
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)
|
|
|
|
If RELOC_MACROS_GEN_FUNC *is* defined, then instead the
|
|
following function will be generated:
|
|
|
|
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;
|
|
}
|
|
}
|
|
*/
|
|
|
|
#ifndef _RELOC_MACROS_H
|
|
#define _RELOC_MACROS_H
|
|
|
|
#ifdef RELOC_MACROS_GEN_FUNC
|
|
|
|
/* 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. */
|
|
|
|
#define START_RELOC_NUMBERS(name) \
|
|
static const char *name (unsigned long rtype); \
|
|
static const char * \
|
|
name (unsigned long rtype) \
|
|
{ \
|
|
switch (rtype) \
|
|
{
|
|
|
|
#define RELOC_NUMBER(name, number) \
|
|
case number: return #name;
|
|
|
|
#define FAKE_RELOC(name, number)
|
|
#define EMPTY_RELOC(name)
|
|
|
|
#define END_RELOC_NUMBERS(name) \
|
|
default: return NULL; \
|
|
} \
|
|
}
|
|
|
|
|
|
#else /* Default to generating enum. */
|
|
|
|
#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 };
|
|
|
|
#endif
|
|
|
|
#endif /* _RELOC_MACROS_H */
|