1 /* BFD library support routines for the AVR architecture.
2 Copyright 1999, 2000, 2002, 2005, 2006, 2007, 2008
3 Free Software Foundation, Inc.
4 Contributed by Denis Chertykov <denisc@overta.ru>
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
22
23 #include "sysdep.h"
24 #include "bfd.h"
25 #include "libbfd.h"
26
27 /* This routine is provided two arch_infos and works out which AVR
28 machine which would be compatible with both and returns a pointer
29 to its info structure. */
30
31 static const bfd_arch_info_type *
compatible(const bfd_arch_info_type * a,const bfd_arch_info_type * b)32 compatible (const bfd_arch_info_type * a,
33 const bfd_arch_info_type * b)
34 {
35 /* If a & b are for different architectures we can do nothing. */
36 if (a->arch != b->arch)
37 return NULL;
38
39 if (a->mach == b->mach)
40 return a;
41
42 /* avr-6 is compatible only with itself as its call convention is not
43 compatible with other avr (the mcu saves the return address on 3 bytes
44 instead of 2). */
45 if (a->mach == bfd_mach_avr6 || b->mach == bfd_mach_avr6)
46 return NULL;
47
48 if (a->mach < bfd_mach_avr6 && b->mach < bfd_mach_avr6)
49 {
50 /* Special case for ATmega[16]03 (avr:3) and ATmega83 (avr:4). */
51 if ((a->mach == bfd_mach_avr3 && b->mach == bfd_mach_avr4)
52 || (a->mach == bfd_mach_avr4 && b->mach == bfd_mach_avr3))
53 return NULL;
54
55 if (a->mach <= b->mach)
56 return b;
57
58 if (a->mach >= b->mach)
59 return a;
60 }
61
62 if (a->mach == bfd_mach_avr2 && b->mach == bfd_mach_avr25)
63 return a;
64 if (a->mach == bfd_mach_avr25 && b->mach == bfd_mach_avr2)
65 return b;
66
67 if (a->mach == bfd_mach_avr3 && b->mach == bfd_mach_avr31)
68 return a;
69 if (a->mach == bfd_mach_avr31 && b->mach == bfd_mach_avr3)
70 return b;
71
72 if (a->mach == bfd_mach_avr3 && b->mach == bfd_mach_avr35)
73 return a;
74 if (a->mach == bfd_mach_avr35 && b->mach == bfd_mach_avr3)
75 return b;
76
77 if (a->mach == bfd_mach_avr5 && b->mach == bfd_mach_avr51)
78 return a;
79 if (a->mach == bfd_mach_avr51 && b->mach == bfd_mach_avr5)
80 return b;
81
82
83 return NULL;
84 }
85
86 #define N(addr_bits, machine, print, default, next) \
87 { \
88 8, /* 8 bits in a word. */ \
89 addr_bits, /* bits in an address. */ \
90 8, /* 8 bits in a byte. */ \
91 bfd_arch_avr, \
92 machine, /* Machine number. */ \
93 "avr", /* Architecture name. */ \
94 print, /* Printable name. */ \
95 1, /* Section align power. */ \
96 default, /* Is this the default ? */ \
97 compatible, \
98 bfd_default_scan, \
99 bfd_arch_default_fill, \
100 next \
101 }
102
103 static const bfd_arch_info_type arch_info_struct[] =
104 {
105 /* Assembler only. */
106 N (16, bfd_mach_avr1, "avr:1", FALSE, & arch_info_struct[1]),
107
108 /* Classic, <= 8K. */
109 N (16, bfd_mach_avr2, "avr:2", FALSE, & arch_info_struct[2]),
110
111 /* Classic + MOVW, <= 8K. */
112 N (16, bfd_mach_avr25, "avr:25", FALSE, & arch_info_struct[3]),
113
114 /* Classic, > 8K, <= 64K. */
115 /* TODO: addr_bits should be 16, but set to 22 for some following
116 version of GCC (from 4.3) for backward compatibility. */
117 N (22, bfd_mach_avr3, "avr:3", FALSE, & arch_info_struct[4]),
118
119 /* Classic, == 128K. */
120 N (22, bfd_mach_avr31, "avr:31", FALSE, & arch_info_struct[5]),
121
122 /* Classic + MOVW + JMP/CALL, > 8K, <= 64K. */
123 N (16, bfd_mach_avr35, "avr:35", FALSE, & arch_info_struct[6]),
124
125 /* Enhanced, <= 8K. */
126 N (16, bfd_mach_avr4, "avr:4", FALSE, & arch_info_struct[7]),
127
128 /* Enhanced, > 8K, <= 64K. */
129 /* TODO: addr_bits should be 16, but set to 22 for some following
130 version of GCC (from 4.3) for backward compatibility. */
131 N (22, bfd_mach_avr5, "avr:5", FALSE, & arch_info_struct[8]),
132
133 /* Enhanced, == 128K. */
134 N (22, bfd_mach_avr51, "avr:51", FALSE, & arch_info_struct[9]),
135
136 /* 3-Byte PC. */
137 N (22, bfd_mach_avr6, "avr:6", FALSE, & arch_info_struct[10]),
138
139 /* Xmega 1 */
140 N (24, bfd_mach_avrxmega1, "avr:101", FALSE, & arch_info_struct[11]),
141
142 /* Xmega 2 */
143 N (24, bfd_mach_avrxmega2, "avr:102", FALSE, & arch_info_struct[12]),
144
145 /* Xmega 3 */
146 N (24, bfd_mach_avrxmega3, "avr:103", FALSE, & arch_info_struct[13]),
147
148 /* Xmega 4 */
149 N (24, bfd_mach_avrxmega4, "avr:104", FALSE, & arch_info_struct[14]),
150
151 /* Xmega 5 */
152 N (24, bfd_mach_avrxmega5, "avr:105", FALSE, & arch_info_struct[15]),
153
154 /* Xmega 6 */
155 N (24, bfd_mach_avrxmega6, "avr:106", FALSE, & arch_info_struct[16]),
156
157 /* Xmega 7 */
158 N (24, bfd_mach_avrxmega7, "avr:107", FALSE, NULL)
159
160 };
161
162 const bfd_arch_info_type bfd_avr_arch =
163 N (16, bfd_mach_avr2, "avr", TRUE, & arch_info_struct[0]);
164