1/* BFD library support routines for the AVR architecture. 2 Copyright (C) 1999-2017 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 30static const bfd_arch_info_type * 31compatible (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, /* 8 bits in a word. */ \ 86 addr_bits, /* bits in an address. */ \ 87 8, /* 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} 99 100static const bfd_arch_info_type arch_info_struct[] = 101{ 102 /* Assembler only. */ 103 N (16, bfd_mach_avr1, "avr:1", FALSE, & arch_info_struct[1]), 104 105 /* Classic, <= 8K. */ 106 N (16, bfd_mach_avr2, "avr:2", FALSE, & arch_info_struct[2]), 107 108 /* Classic + MOVW, <= 8K. */ 109 N (16, bfd_mach_avr25, "avr:25", FALSE, & arch_info_struct[3]), 110 111 /* Classic, > 8K, <= 64K. */ 112 /* TODO: addr_bits should be 16, but set to 22 for some following 113 version of GCC (from 4.3) for backward compatibility. */ 114 N (22, bfd_mach_avr3, "avr:3", FALSE, & arch_info_struct[4]), 115 116 /* Classic, == 128K. */ 117 N (22, bfd_mach_avr31, "avr:31", FALSE, & arch_info_struct[5]), 118 119 /* Classic + MOVW + JMP/CALL, > 8K, <= 64K. */ 120 N (16, bfd_mach_avr35, "avr:35", FALSE, & arch_info_struct[6]), 121 122 /* Enhanced, <= 8K. */ 123 N (16, bfd_mach_avr4, "avr:4", FALSE, & arch_info_struct[7]), 124 125 /* Enhanced, > 8K, <= 64K. */ 126 /* TODO: addr_bits should be 16, but set to 22 for some following 127 version of GCC (from 4.3) for backward compatibility. */ 128 N (22, bfd_mach_avr5, "avr:5", FALSE, & arch_info_struct[8]), 129 130 /* Enhanced, == 128K. */ 131 N (22, bfd_mach_avr51, "avr:51", FALSE, & arch_info_struct[9]), 132 133 /* 3-Byte PC. */ 134 N (22, bfd_mach_avr6, "avr:6", FALSE, & arch_info_struct[10]), 135 136 /* Tiny core (AVR Tiny). */ 137 N (16, bfd_mach_avrtiny, "avr:100", FALSE, & arch_info_struct[11]), 138 139 /* Xmega 1. */ 140 N (24, bfd_mach_avrxmega1, "avr:101", FALSE, & arch_info_struct[12]), 141 142 /* Xmega 2. */ 143 N (24, bfd_mach_avrxmega2, "avr:102", FALSE, & arch_info_struct[13]), 144 145 /* Xmega 3. */ 146 N (24, bfd_mach_avrxmega3, "avr:103", FALSE, & arch_info_struct[14]), 147 148 /* Xmega 4. */ 149 N (24, bfd_mach_avrxmega4, "avr:104", FALSE, & arch_info_struct[15]), 150 151 /* Xmega 5. */ 152 N (24, bfd_mach_avrxmega5, "avr:105", FALSE, & arch_info_struct[16]), 153 154 /* Xmega 6. */ 155 N (24, bfd_mach_avrxmega6, "avr:106", FALSE, & arch_info_struct[17]), 156 157 /* Xmega 7. */ 158 N (24, bfd_mach_avrxmega7, "avr:107", FALSE, NULL) 159 160}; 161 162const bfd_arch_info_type bfd_avr_arch = 163 N (16, bfd_mach_avr2, "avr", TRUE, & arch_info_struct[0]); 164