| 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 * |
| 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 | next \ |
| 100 | } |
| 101 | |
| 102 | static const bfd_arch_info_type arch_info_struct[] = |
| 103 | { |
| 104 | /* Assembler only. */ |
| 105 | N (16, bfd_mach_avr1, "avr:1", FALSE, & arch_info_struct[1]), |
| 106 | |
| 107 | /* Classic, <= 8K. */ |
| 108 | N (16, bfd_mach_avr2, "avr:2", FALSE, & arch_info_struct[2]), |
| 109 | |
| 110 | /* Classic + MOVW, <= 8K. */ |
| 111 | N (16, bfd_mach_avr25, "avr:25", FALSE, & arch_info_struct[3]), |
| 112 | |
| 113 | /* Classic, > 8K, <= 64K. */ |
| 114 | /* TODO: addr_bits should be 16, but set to 22 for some following |
| 115 | version of GCC (from 4.3) for backward compatibility. */ |
| 116 | N (22, bfd_mach_avr3, "avr:3", FALSE, & arch_info_struct[4]), |
| 117 | |
| 118 | /* Classic, == 128K. */ |
| 119 | N (22, bfd_mach_avr31, "avr:31", FALSE, & arch_info_struct[5]), |
| 120 | |
| 121 | /* Classic + MOVW + JMP/CALL, > 8K, <= 64K. */ |
| 122 | N (16, bfd_mach_avr35, "avr:35", FALSE, & arch_info_struct[6]), |
| 123 | |
| 124 | /* Enhanced, <= 8K. */ |
| 125 | N (16, bfd_mach_avr4, "avr:4", FALSE, & arch_info_struct[7]), |
| 126 | |
| 127 | /* Enhanced, > 8K, <= 64K. */ |
| 128 | /* TODO: addr_bits should be 16, but set to 22 for some following |
| 129 | version of GCC (from 4.3) for backward compatibility. */ |
| 130 | N (22, bfd_mach_avr5, "avr:5", FALSE, & arch_info_struct[8]), |
| 131 | |
| 132 | /* Enhanced, == 128K. */ |
| 133 | N (22, bfd_mach_avr51, "avr:51", FALSE, & arch_info_struct[9]), |
| 134 | |
| 135 | /* 3-Byte PC. */ |
| 136 | N (22, bfd_mach_avr6, "avr:6", FALSE, NULL) |
| 137 | }; |
| 138 | |
| 139 | const bfd_arch_info_type bfd_avr_arch = |
| 140 | N (16, bfd_mach_avr2, "avr", TRUE, & arch_info_struct[0]); |