coff-apollo.c revision 1.4 
1/* BFD back-end for Apollo 68000 COFF binaries.
2   Copyright 1990, 91, 92, 93, 94, 95, 1997 Free Software Foundation, Inc.
3   By Troy Rollo (troy@cbme.unsw.edu.au)
4   Based on m68k standard COFF version Written by Cygnus Support.
5
6This file is part of BFD, the Binary File Descriptor library.
7
8This program is free software; you can redistribute it and/or modify
9it under the terms of the GNU General Public License as published by
10the Free Software Foundation; either version 2 of the License, or
11(at your option) any later version.
12
13This program is distributed in the hope that it will be useful,
14but WITHOUT ANY WARRANTY; without even the implied warranty of
15MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16GNU General Public License for more details.
17
18You should have received a copy of the GNU General Public License
19along with this program; if not, write to the Free Software
20Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
21
22#include "bfd.h"
23#include "sysdep.h"
24#include "libbfd.h"
25#include "coff/apollo.h"
26#include "coff/internal.h"
27#include "libcoff.h"
28
29#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (3)
30
31#ifdef ONLY_DECLARE_RELOCS
32extern reloc_howto_type apollocoff_howto_table[];
33#else
34reloc_howto_type apollocoff_howto_table[] =
35{
36  HOWTO(R_RELBYTE,	       0,  0,  	8,  false, 0, complain_overflow_bitfield, 0, "8",	true, 0x000000ff,0x000000ff, false),
37  HOWTO(R_RELWORD,	       0,  1, 	16, false, 0, complain_overflow_bitfield, 0, "16",	true, 0x0000ffff,0x0000ffff, false),
38  HOWTO(R_RELLONG,	       0,  2, 	32, false, 0, complain_overflow_bitfield, 0, "32",	true, 0xffffffff,0xffffffff, false),
39  HOWTO(R_PCRBYTE,	       0,  0, 	8,  true,  0, complain_overflow_signed, 0, "DISP8",    true, 0x000000ff,0x000000ff, false),
40  HOWTO(R_PCRWORD,	       0,  1, 	16, true,  0, complain_overflow_signed, 0, "DISP16",   true, 0x0000ffff,0x0000ffff, false),
41  HOWTO(R_PCRLONG,	       0,  2, 	32, true,  0, complain_overflow_signed, 0, "DISP32",   true, 0xffffffff,0xffffffff, false),
42  HOWTO(R_RELLONG_NEG,	       0,  -2, 	32, false, 0, complain_overflow_bitfield, 0, "-32",	true, 0xffffffff,0xffffffff, false),
43};
44#endif /* not ONLY_DECLARE_RELOCS */
45
46#ifndef BADMAG
47#define BADMAG(x) M68KBADMAG(x)
48#endif
49#define APOLLO_M68 1		/* Customize coffcode.h */
50
51/* Turn a howto into a reloc number */
52
53#ifdef ONLY_DECLARE_RELOCS
54extern void apollo_rtype2howto PARAMS ((arelent *internal, int relocentry));
55extern int apollo_howto2rtype PARAMS ((reloc_howto_type *));
56#else
57void
58apollo_rtype2howto(internal, relocentry)
59     arelent *internal;
60     int relocentry;
61{
62  switch (relocentry)
63  {
64   case R_RELBYTE:	internal->howto = apollocoff_howto_table + 0; break;
65   case R_RELWORD:	internal->howto = apollocoff_howto_table + 1; break;
66   case R_RELLONG:	internal->howto = apollocoff_howto_table + 2; break;
67   case R_PCRBYTE:	internal->howto = apollocoff_howto_table + 3; break;
68   case R_PCRWORD:	internal->howto = apollocoff_howto_table + 4; break;
69   case R_PCRLONG:	internal->howto = apollocoff_howto_table + 5; break;
70   case R_RELLONG_NEG:	internal->howto = apollocoff_howto_table + 6; break;
71  }
72}
73
74int
75apollo_howto2rtype (internal)
76     reloc_howto_type *internal;
77{
78  if (internal->pc_relative)
79  {
80    switch (internal->bitsize)
81    {
82     case 32: return R_PCRLONG;
83     case 16: return R_PCRWORD;
84     case 8: return R_PCRBYTE;
85    }
86  }
87  else
88  {
89    switch (internal->bitsize)
90     {
91      case 32: return R_RELLONG;
92      case 16: return R_RELWORD;
93      case 8: return R_RELBYTE;
94     }
95  }
96  return R_RELLONG;
97}
98#endif /* not ONLY_DECLARE_RELOCS */
99
100#define RTYPE2HOWTO(internal, relocentry) \
101  apollo_rtype2howto(internal, (relocentry)->r_type)
102
103#define SELECT_RELOC(external, internal) \
104  external.r_type = apollo_howto2rtype(internal);
105
106#include "coffcode.h"
107
108#ifndef TARGET_SYM
109#define TARGET_SYM apollocoff_vec
110#endif
111
112#ifndef TARGET_NAME
113#define TARGET_NAME "apollo-m68k"
114#endif
115
116#ifdef NAMES_HAVE_UNDERSCORE
117CREATE_BIG_COFF_TARGET_VEC (TARGET_SYM, TARGET_NAME, 0, 0, '_', NULL)
118#else
119CREATE_BIG_COFF_TARGET_VEC (TARGET_SYM, TARGET_NAME, 0, 0, 0, NULL)
120#endif
121