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1 | /* BFD library support routines for the AVR architecture. | |
2 | Copyright (C) 1999-2021 Free Software Foundation, Inc. | |
3 | Contributed by Denis Chertykov <denisc@overta.ru> | |
4 | ||
5 | This file is part of BFD, the Binary File Descriptor library. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
20 | MA 02110-1301, USA. */ | |
21 | ||
22 | #include "sysdep.h" | |
23 | #include "bfd.h" | |
24 | #include "libbfd.h" | |
25 | ||
26 | /* This routine is provided two arch_infos and works out which AVR | |
27 | machine which would be compatible with both and returns a pointer | |
28 | to its info structure. */ | |
29 | ||
30 | static const bfd_arch_info_type * | |
31 | compatible (const bfd_arch_info_type * a, | |
32 | const bfd_arch_info_type * b) | |
33 | { | |
34 | /* If a & b are for different architectures we can do nothing. */ | |
35 | if (a->arch != b->arch) | |
36 | return NULL; | |
37 | ||
38 | if (a->mach == b->mach) | |
39 | return a; | |
40 | ||
41 | /* avr-6 is compatible only with itself as its call convention is not | |
42 | compatible with other avr (the mcu saves the return address on 3 bytes | |
43 | instead of 2). */ | |
44 | if (a->mach == bfd_mach_avr6 || b->mach == bfd_mach_avr6) | |
45 | return NULL; | |
46 | ||
47 | if (a->mach < bfd_mach_avr6 && b->mach < bfd_mach_avr6) | |
48 | { | |
49 | /* Special case for ATmega[16]03 (avr:3) and ATmega83 (avr:4). */ | |
50 | if ((a->mach == bfd_mach_avr3 && b->mach == bfd_mach_avr4) | |
51 | || (a->mach == bfd_mach_avr4 && b->mach == bfd_mach_avr3)) | |
52 | return NULL; | |
53 | ||
54 | if (a->mach <= b->mach) | |
55 | return b; | |
56 | ||
57 | if (a->mach >= b->mach) | |
58 | return a; | |
59 | } | |
60 | ||
61 | if (a->mach == bfd_mach_avr2 && b->mach == bfd_mach_avr25) | |
62 | return a; | |
63 | if (a->mach == bfd_mach_avr25 && b->mach == bfd_mach_avr2) | |
64 | return b; | |
65 | ||
66 | if (a->mach == bfd_mach_avr3 && b->mach == bfd_mach_avr31) | |
67 | return a; | |
68 | if (a->mach == bfd_mach_avr31 && b->mach == bfd_mach_avr3) | |
69 | return b; | |
70 | if (a->mach == bfd_mach_avr3 && b->mach == bfd_mach_avr35) | |
71 | return a; | |
72 | if (a->mach == bfd_mach_avr35 && b->mach == bfd_mach_avr3) | |
73 | return b; | |
74 | ||
75 | if (a->mach == bfd_mach_avr5 && b->mach == bfd_mach_avr51) | |
76 | return a; | |
77 | if (a->mach == bfd_mach_avr51 && b->mach == bfd_mach_avr5) | |
78 | return b; | |
79 | ||
80 | return NULL; | |
81 | } | |
82 | ||
83 | #define N(addr_bits, machine, print, default, next) \ | |
84 | { \ | |
85 | 8, /* Bits in a word. */ \ | |
86 | addr_bits, /* Bits in an address. */ \ | |
87 | 8, /* Bits in a byte. */ \ | |
88 | bfd_arch_avr, \ | |
89 | machine, /* Machine number. */ \ | |
90 | "avr", /* Architecture name. */ \ | |
91 | print, /* Printable name. */ \ | |
92 | 1, /* Section align power. */ \ | |
93 | default, /* Is this the default ? */ \ | |
94 | compatible, \ | |
95 | bfd_default_scan, \ | |
96 | bfd_arch_default_fill, \ | |
97 | next, \ | |
98 | 0 /* Maximum offset of a reloc from the start of an insn. */ \ | |
99 | } | |
100 | ||
101 | static const bfd_arch_info_type arch_info_struct[] = | |
102 | { | |
103 | /* Assembler only. */ | |
104 | N (16, bfd_mach_avr1, "avr:1", FALSE, & arch_info_struct[1]), | |
105 | ||
106 | /* Classic, <= 8K. */ | |
107 | N (16, bfd_mach_avr2, "avr:2", FALSE, & arch_info_struct[2]), | |
108 | ||
109 | /* Classic + MOVW, <= 8K. */ | |
110 | N (16, bfd_mach_avr25, "avr:25", FALSE, & arch_info_struct[3]), | |
111 | ||
112 | /* Classic, > 8K, <= 64K. */ | |
113 | /* TODO: addr_bits should be 16, but set to 22 for some following | |
114 | version of GCC (from 4.3) for backward compatibility. */ | |
115 | N (22, bfd_mach_avr3, "avr:3", FALSE, & arch_info_struct[4]), | |
116 | ||
117 | /* Classic, == 128K. */ | |
118 | N (22, bfd_mach_avr31, "avr:31", FALSE, & arch_info_struct[5]), | |
119 | ||
120 | /* Classic + MOVW + JMP/CALL, > 8K, <= 64K. */ | |
121 | N (16, bfd_mach_avr35, "avr:35", FALSE, & arch_info_struct[6]), | |
122 | ||
123 | /* Enhanced, <= 8K. */ | |
124 | N (16, bfd_mach_avr4, "avr:4", FALSE, & arch_info_struct[7]), | |
125 | ||
126 | /* Enhanced, > 8K, <= 64K. */ | |
127 | /* TODO: addr_bits should be 16, but set to 22 for some following | |
128 | version of GCC (from 4.3) for backward compatibility. */ | |
129 | N (22, bfd_mach_avr5, "avr:5", FALSE, & arch_info_struct[8]), | |
130 | ||
131 | /* Enhanced, == 128K. */ | |
132 | N (22, bfd_mach_avr51, "avr:51", FALSE, & arch_info_struct[9]), | |
133 | ||
134 | /* 3-Byte PC. */ | |
135 | N (22, bfd_mach_avr6, "avr:6", FALSE, & arch_info_struct[10]), | |
136 | ||
137 | /* Tiny core (AVR Tiny). */ | |
138 | N (16, bfd_mach_avrtiny, "avr:100", FALSE, & arch_info_struct[11]), | |
139 | ||
140 | /* Xmega 1. */ | |
141 | N (24, bfd_mach_avrxmega1, "avr:101", FALSE, & arch_info_struct[12]), | |
142 | ||
143 | /* Xmega 2. */ | |
144 | N (24, bfd_mach_avrxmega2, "avr:102", FALSE, & arch_info_struct[13]), | |
145 | ||
146 | /* Xmega 3. */ | |
147 | N (24, bfd_mach_avrxmega3, "avr:103", FALSE, & arch_info_struct[14]), | |
148 | ||
149 | /* Xmega 4. */ | |
150 | N (24, bfd_mach_avrxmega4, "avr:104", FALSE, & arch_info_struct[15]), | |
151 | ||
152 | /* Xmega 5. */ | |
153 | N (24, bfd_mach_avrxmega5, "avr:105", FALSE, & arch_info_struct[16]), | |
154 | ||
155 | /* Xmega 6. */ | |
156 | N (24, bfd_mach_avrxmega6, "avr:106", FALSE, & arch_info_struct[17]), | |
157 | ||
158 | /* Xmega 7. */ | |
159 | N (24, bfd_mach_avrxmega7, "avr:107", FALSE, NULL) | |
160 | ||
161 | }; | |
162 | ||
163 | const bfd_arch_info_type bfd_avr_arch = | |
164 | N (16, bfd_mach_avr2, "avr", TRUE, & arch_info_struct[0]); |