| 1 | /* BFD library support routines for architectures. |
| 2 | Copyright 1990, 1991, 1992, 1993, 1994, 1997, 1998, 2000, 2001, 2002, |
| 3 | 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc. |
| 4 | Hacked by Steve Chamberlain of Cygnus Support. |
| 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 | #include "opcode/m68k.h" |
| 27 | |
| 28 | static const bfd_arch_info_type * |
| 29 | bfd_m68k_compatible (const bfd_arch_info_type *a, |
| 30 | const bfd_arch_info_type *b); |
| 31 | |
| 32 | #define N(name, print,d,next) \ |
| 33 | { 32, 32, 8, bfd_arch_m68k, name, "m68k",print,2,d,bfd_m68k_compatible,bfd_default_scan, next, } |
| 34 | |
| 35 | static const bfd_arch_info_type arch_info_struct[] = |
| 36 | { |
| 37 | N(bfd_mach_m68000, "m68k:68000", FALSE, &arch_info_struct[1]), |
| 38 | N(bfd_mach_m68008, "m68k:68008", FALSE, &arch_info_struct[2]), |
| 39 | N(bfd_mach_m68010, "m68k:68010", FALSE, &arch_info_struct[3]), |
| 40 | N(bfd_mach_m68020, "m68k:68020", FALSE, &arch_info_struct[4]), |
| 41 | N(bfd_mach_m68030, "m68k:68030", FALSE, &arch_info_struct[5]), |
| 42 | N(bfd_mach_m68040, "m68k:68040", FALSE, &arch_info_struct[6]), |
| 43 | N(bfd_mach_m68060, "m68k:68060", FALSE, &arch_info_struct[7]), |
| 44 | N(bfd_mach_cpu32, "m68k:cpu32", FALSE, &arch_info_struct[8]), |
| 45 | N(bfd_mach_fido, "m68k:fido", FALSE, &arch_info_struct[9]), |
| 46 | |
| 47 | /* Various combinations of CF architecture features */ |
| 48 | N(bfd_mach_mcf_isa_a_nodiv, "m68k:isa-a:nodiv", |
| 49 | FALSE, &arch_info_struct[10]), |
| 50 | N(bfd_mach_mcf_isa_a, "m68k:isa-a", |
| 51 | FALSE, &arch_info_struct[11]), |
| 52 | N(bfd_mach_mcf_isa_a_mac, "m68k:isa-a:mac", |
| 53 | FALSE, &arch_info_struct[12]), |
| 54 | N(bfd_mach_mcf_isa_a_emac, "m68k:isa-a:emac", |
| 55 | FALSE, &arch_info_struct[13]), |
| 56 | N(bfd_mach_mcf_isa_aplus, "m68k:isa-aplus", |
| 57 | FALSE, &arch_info_struct[14]), |
| 58 | N(bfd_mach_mcf_isa_aplus_mac, "m68k:isa-aplus:mac", |
| 59 | FALSE, &arch_info_struct[15]), |
| 60 | N(bfd_mach_mcf_isa_aplus_emac, "m68k:isa-aplus:emac", |
| 61 | FALSE, &arch_info_struct[16]), |
| 62 | N(bfd_mach_mcf_isa_b_nousp, "m68k:isa-b:nousp", |
| 63 | FALSE, &arch_info_struct[17]), |
| 64 | N(bfd_mach_mcf_isa_b_nousp_mac, "m68k:isa-b:nousp:mac", |
| 65 | FALSE, &arch_info_struct[18]), |
| 66 | N(bfd_mach_mcf_isa_b_nousp_emac, "m68k:isa-b:nousp:emac", |
| 67 | FALSE, &arch_info_struct[19]), |
| 68 | N(bfd_mach_mcf_isa_b, "m68k:isa-b", |
| 69 | FALSE, &arch_info_struct[20]), |
| 70 | N(bfd_mach_mcf_isa_b_mac, "m68k:isa-b:mac", |
| 71 | FALSE, &arch_info_struct[21]), |
| 72 | N(bfd_mach_mcf_isa_b_emac, "m68k:isa-b:emac", |
| 73 | FALSE, &arch_info_struct[22]), |
| 74 | N(bfd_mach_mcf_isa_b_float, "m68k:isa-b:float", |
| 75 | FALSE, &arch_info_struct[23]), |
| 76 | N(bfd_mach_mcf_isa_b_float_mac, "m68k:isa-b:float:mac", |
| 77 | FALSE, &arch_info_struct[24]), |
| 78 | N(bfd_mach_mcf_isa_b_float_emac, "m68k:isa-b:float:emac", |
| 79 | FALSE, &arch_info_struct[25]), |
| 80 | N(bfd_mach_mcf_isa_c, "m68k:isa-c", |
| 81 | FALSE, &arch_info_struct[26]), |
| 82 | N(bfd_mach_mcf_isa_c_mac, "m68k:isa-c:mac", |
| 83 | FALSE, &arch_info_struct[27]), |
| 84 | N(bfd_mach_mcf_isa_c_emac, "m68k:isa-c:emac", |
| 85 | FALSE, &arch_info_struct[28]), |
| 86 | N(bfd_mach_mcf_isa_c_nodiv, "m68k:isa-c:nodiv", |
| 87 | FALSE, &arch_info_struct[29]), |
| 88 | N(bfd_mach_mcf_isa_c_nodiv_mac, "m68k:isa-c:nodiv:mac", |
| 89 | FALSE, &arch_info_struct[30]), |
| 90 | N(bfd_mach_mcf_isa_c_nodiv_emac, "m68k:isa-c:nodiv:emac", |
| 91 | FALSE, &arch_info_struct[31]), |
| 92 | |
| 93 | /* Legacy names for CF architectures */ |
| 94 | N(bfd_mach_mcf_isa_a_nodiv, "m68k:5200", FALSE, &arch_info_struct[32]), |
| 95 | N(bfd_mach_mcf_isa_a_mac,"m68k:5206e", FALSE, &arch_info_struct[33]), |
| 96 | N(bfd_mach_mcf_isa_a_mac, "m68k:5307", FALSE, &arch_info_struct[34]), |
| 97 | N(bfd_mach_mcf_isa_b_nousp_mac, "m68k:5407", FALSE, &arch_info_struct[35]), |
| 98 | N(bfd_mach_mcf_isa_aplus_emac, "m68k:528x", FALSE, &arch_info_struct[36]), |
| 99 | N(bfd_mach_mcf_isa_aplus_emac, "m68k:521x", FALSE, &arch_info_struct[37]), |
| 100 | N(bfd_mach_mcf_isa_a_emac, "m68k:5249", FALSE, &arch_info_struct[38]), |
| 101 | N(bfd_mach_mcf_isa_b_float_emac, "m68k:547x", |
| 102 | FALSE, &arch_info_struct[39]), |
| 103 | N(bfd_mach_mcf_isa_b_float_emac, "m68k:548x", |
| 104 | FALSE, &arch_info_struct[40]), |
| 105 | N(bfd_mach_mcf_isa_b_float_emac, "m68k:cfv4e", FALSE, 0), |
| 106 | }; |
| 107 | |
| 108 | const bfd_arch_info_type bfd_m68k_arch = |
| 109 | N(0, "m68k", TRUE, &arch_info_struct[0]); |
| 110 | |
| 111 | /* Table indexed by bfd_mach_arch number indicating which |
| 112 | architectural features are supported. */ |
| 113 | static const unsigned m68k_arch_features[] = |
| 114 | { |
| 115 | 0, |
| 116 | m68000|m68881|m68851, |
| 117 | m68000|m68881|m68851, |
| 118 | m68010|m68881|m68851, |
| 119 | m68020|m68881|m68851, |
| 120 | m68030|m68881|m68851, |
| 121 | m68040|m68881|m68851, |
| 122 | m68060|m68881|m68851, |
| 123 | cpu32|m68881, |
| 124 | fido_a|m68881, |
| 125 | mcfisa_a, |
| 126 | mcfisa_a|mcfhwdiv, |
| 127 | mcfisa_a|mcfhwdiv|mcfmac, |
| 128 | mcfisa_a|mcfhwdiv|mcfemac, |
| 129 | mcfisa_a|mcfisa_aa|mcfhwdiv|mcfusp, |
| 130 | mcfisa_a|mcfisa_aa|mcfhwdiv|mcfusp|mcfmac, |
| 131 | mcfisa_a|mcfisa_aa|mcfhwdiv|mcfusp|mcfemac, |
| 132 | mcfisa_a|mcfhwdiv|mcfisa_b, |
| 133 | mcfisa_a|mcfhwdiv|mcfisa_b|mcfmac, |
| 134 | mcfisa_a|mcfhwdiv|mcfisa_b|mcfemac, |
| 135 | mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp, |
| 136 | mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|mcfmac, |
| 137 | mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|mcfemac, |
| 138 | mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|cfloat, |
| 139 | mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|cfloat|mcfmac, |
| 140 | mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|cfloat|mcfemac, |
| 141 | mcfisa_a|mcfhwdiv|mcfisa_c|mcfusp, |
| 142 | mcfisa_a|mcfhwdiv|mcfisa_c|mcfusp|mcfmac, |
| 143 | mcfisa_a|mcfhwdiv|mcfisa_c|mcfusp|mcfemac, |
| 144 | mcfisa_a|mcfisa_c|mcfusp, |
| 145 | mcfisa_a|mcfisa_c|mcfusp|mcfmac, |
| 146 | mcfisa_a|mcfisa_c|mcfusp|mcfemac, |
| 147 | }; |
| 148 | |
| 149 | /* Return the count of bits set in MASK */ |
| 150 | static unsigned |
| 151 | bit_count (unsigned mask) |
| 152 | { |
| 153 | unsigned ix; |
| 154 | |
| 155 | for (ix = 0; mask; ix++) |
| 156 | /* Clear the LSB set */ |
| 157 | mask ^= mask & -mask; |
| 158 | return ix; |
| 159 | } |
| 160 | |
| 161 | /* Return the architectural features supported by MACH */ |
| 162 | |
| 163 | unsigned |
| 164 | bfd_m68k_mach_to_features (int mach) |
| 165 | { |
| 166 | if ((unsigned)mach |
| 167 | >= sizeof (m68k_arch_features) / sizeof (m68k_arch_features[0])) |
| 168 | mach = 0; |
| 169 | return m68k_arch_features[mach]; |
| 170 | } |
| 171 | |
| 172 | /* Return the bfd machine that most closely represents the |
| 173 | architectural features. We find the machine with the smallest |
| 174 | number of additional features. If there is no such machine, we |
| 175 | find the one with the smallest number of missing features. */ |
| 176 | |
| 177 | int bfd_m68k_features_to_mach (unsigned features) |
| 178 | { |
| 179 | int superset = 0, subset = 0; |
| 180 | unsigned extra = 99, missing = 99; |
| 181 | unsigned ix; |
| 182 | |
| 183 | for (ix = 0; |
| 184 | ix != sizeof (m68k_arch_features) / sizeof (m68k_arch_features[0]); |
| 185 | ix++) |
| 186 | { |
| 187 | unsigned this_extra, this_missing; |
| 188 | |
| 189 | if (m68k_arch_features[ix] == features) |
| 190 | return ix; |
| 191 | this_extra = bit_count (m68k_arch_features[ix] & ~features); |
| 192 | if (this_extra < extra) |
| 193 | { |
| 194 | extra = this_extra; |
| 195 | superset = ix; |
| 196 | } |
| 197 | |
| 198 | this_missing = bit_count (features & ~m68k_arch_features[ix]); |
| 199 | if (this_missing < missing) |
| 200 | { |
| 201 | missing = this_missing; |
| 202 | superset = ix; |
| 203 | } |
| 204 | } |
| 205 | return superset ? superset : subset; |
| 206 | } |
| 207 | |
| 208 | static const bfd_arch_info_type * |
| 209 | bfd_m68k_compatible (const bfd_arch_info_type *a, |
| 210 | const bfd_arch_info_type *b) |
| 211 | { |
| 212 | if (a->arch != b->arch) |
| 213 | return NULL; |
| 214 | |
| 215 | if (a->bits_per_word != b->bits_per_word) |
| 216 | return NULL; |
| 217 | |
| 218 | if (!a->mach) |
| 219 | return b; |
| 220 | if (!b->mach) |
| 221 | return a; |
| 222 | |
| 223 | if (a->mach <= bfd_mach_m68060 && b->mach <= bfd_mach_m68060) |
| 224 | /* Merge m68k machine. */ |
| 225 | return a->mach > b->mach ? a : b; |
| 226 | else if (a->mach >= bfd_mach_cpu32 && b->mach >= bfd_mach_cpu32) |
| 227 | { |
| 228 | /* Merge the machine features. */ |
| 229 | unsigned features = (bfd_m68k_mach_to_features (a->mach) |
| 230 | | bfd_m68k_mach_to_features (b->mach)); |
| 231 | |
| 232 | /* CPU32 and Coldfire are incompatible. */ |
| 233 | if ((~features & (cpu32 | mcfisa_a)) == 0) |
| 234 | return NULL; |
| 235 | |
| 236 | /* Fido and Coldfire are incompatible. */ |
| 237 | if ((~features & (fido_a | mcfisa_a)) == 0) |
| 238 | return NULL; |
| 239 | |
| 240 | /* ISA A+ and ISA B are incompatible. */ |
| 241 | if ((~features & (mcfisa_aa | mcfisa_b)) == 0) |
| 242 | return NULL; |
| 243 | |
| 244 | /* ISA B and ISA C are incompatible. */ |
| 245 | if ((~features & (mcfisa_b | mcfisa_c)) == 0) |
| 246 | return NULL; |
| 247 | |
| 248 | /* MAC and EMAC code cannot be merged. */ |
| 249 | if ((~features & (mcfmac | mcfemac)) == 0) |
| 250 | return NULL; |
| 251 | |
| 252 | /* CPU32 is compatible with Fido except that Fido does not |
| 253 | support tbl instructions. Warn when the user wants to mix |
| 254 | the two. */ |
| 255 | if ((a->mach == bfd_mach_cpu32 && b->mach == bfd_mach_fido) |
| 256 | || (a->mach == bfd_mach_fido && b->mach == bfd_mach_cpu32)) |
| 257 | { |
| 258 | static int cpu32_fido_mix_warning; |
| 259 | if (!cpu32_fido_mix_warning) |
| 260 | { |
| 261 | cpu32_fido_mix_warning = 1; |
| 262 | (*_bfd_error_handler) ("warning: linking CPU32 objects with fido objects"); |
| 263 | } |
| 264 | return bfd_lookup_arch (a->arch, |
| 265 | bfd_m68k_features_to_mach (fido_a | m68881)); |
| 266 | } |
| 267 | |
| 268 | return bfd_lookup_arch (a->arch, bfd_m68k_features_to_mach (features)); |
| 269 | } |
| 270 | else |
| 271 | /* They are incompatible. */ |
| 272 | return NULL; |
| 273 | } |