Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* BFD library support routines for architectures. |
3e602632 | 2 | Copyright 1990, 1991, 1992, 1993, 1994, 1997, 1998, 2000, 2001, 2002, |
266abb8f | 3 | 2003, 2004, 2006 Free Software Foundation, Inc. |
252b5132 RH |
4 | Hacked by Steve Chamberlain of Cygnus Support. |
5 | ||
3e602632 | 6 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 7 | |
3e602632 NC |
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 2 of the License, or | |
11 | (at your option) any later version. | |
252b5132 | 12 | |
3e602632 NC |
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. | |
252b5132 | 17 | |
3e602632 NC |
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 | |
3e110533 | 20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
252b5132 RH |
21 | |
22 | #include "bfd.h" | |
23 | #include "sysdep.h" | |
24 | #include "libbfd.h" | |
266abb8f | 25 | #include "opcode/m68k.h" |
252b5132 | 26 | |
0b2e31dc NS |
27 | static const bfd_arch_info_type * |
28 | bfd_m68k_compatible (const bfd_arch_info_type *a, | |
29 | const bfd_arch_info_type *b); | |
30 | ||
252b5132 | 31 | #define N(name, print,d,next) \ |
0b2e31dc | 32 | { 32, 32, 8, bfd_arch_m68k, name, "m68k",print,2,d,bfd_m68k_compatible,bfd_default_scan, next, } |
252b5132 RH |
33 | |
34 | static const bfd_arch_info_type arch_info_struct[] = | |
3cac17ae | 35 | { |
3e602632 NC |
36 | N(bfd_mach_m68000, "m68k:68000", FALSE, &arch_info_struct[1]), |
37 | N(bfd_mach_m68008, "m68k:68008", FALSE, &arch_info_struct[2]), | |
38 | N(bfd_mach_m68010, "m68k:68010", FALSE, &arch_info_struct[3]), | |
39 | N(bfd_mach_m68020, "m68k:68020", FALSE, &arch_info_struct[4]), | |
40 | N(bfd_mach_m68030, "m68k:68030", FALSE, &arch_info_struct[5]), | |
41 | N(bfd_mach_m68040, "m68k:68040", FALSE, &arch_info_struct[6]), | |
266abb8f NS |
42 | N(bfd_mach_m68060, "m68k:68060", FALSE, &arch_info_struct[7]), |
43 | N(bfd_mach_cpu32, "m68k:cpu32", FALSE, &arch_info_struct[8]), | |
3bdcfdf4 | 44 | N(bfd_mach_fido, "m68k:fido", FALSE, &arch_info_struct[9]), |
266abb8f NS |
45 | |
46 | /* Various combinations of CF architecture features */ | |
0b2e31dc | 47 | N(bfd_mach_mcf_isa_a_nodiv, "m68k:isa-a:nodiv", |
266abb8f | 48 | FALSE, &arch_info_struct[10]), |
9840d27e | 49 | N(bfd_mach_mcf_isa_a, "m68k:isa-a", |
266abb8f | 50 | FALSE, &arch_info_struct[11]), |
9840d27e | 51 | N(bfd_mach_mcf_isa_a_mac, "m68k:isa-a:mac", |
266abb8f | 52 | FALSE, &arch_info_struct[12]), |
9840d27e | 53 | N(bfd_mach_mcf_isa_a_emac, "m68k:isa-a:emac", |
266abb8f | 54 | FALSE, &arch_info_struct[13]), |
9840d27e | 55 | N(bfd_mach_mcf_isa_aplus, "m68k:isa-aplus", |
266abb8f | 56 | FALSE, &arch_info_struct[14]), |
9840d27e | 57 | N(bfd_mach_mcf_isa_aplus_mac, "m68k:isa-aplus:mac", |
266abb8f | 58 | FALSE, &arch_info_struct[15]), |
9840d27e | 59 | N(bfd_mach_mcf_isa_aplus_emac, "m68k:isa-aplus:emac", |
266abb8f | 60 | FALSE, &arch_info_struct[16]), |
9840d27e | 61 | N(bfd_mach_mcf_isa_b_nousp, "m68k:isa-b:nousp", |
266abb8f | 62 | FALSE, &arch_info_struct[17]), |
9840d27e | 63 | N(bfd_mach_mcf_isa_b_nousp_mac, "m68k:isa-b:nousp:mac", |
266abb8f | 64 | FALSE, &arch_info_struct[18]), |
9840d27e | 65 | N(bfd_mach_mcf_isa_b_nousp_emac, "m68k:isa-b:nousp:emac", |
266abb8f | 66 | FALSE, &arch_info_struct[19]), |
9840d27e | 67 | N(bfd_mach_mcf_isa_b, "m68k:isa-b", |
266abb8f | 68 | FALSE, &arch_info_struct[20]), |
9840d27e | 69 | N(bfd_mach_mcf_isa_b_mac, "m68k:isa-b:mac", |
266abb8f | 70 | FALSE, &arch_info_struct[21]), |
9840d27e | 71 | N(bfd_mach_mcf_isa_b_emac, "m68k:isa-b:emac", |
266abb8f | 72 | FALSE, &arch_info_struct[22]), |
9840d27e | 73 | N(bfd_mach_mcf_isa_b_float, "m68k:isa-b:float", |
266abb8f | 74 | FALSE, &arch_info_struct[23]), |
9840d27e | 75 | N(bfd_mach_mcf_isa_b_float_mac, "m68k:isa-b:float:mac", |
266abb8f | 76 | FALSE, &arch_info_struct[24]), |
9840d27e KH |
77 | N(bfd_mach_mcf_isa_b_float_emac, "m68k:isa-b:float:emac", |
78 | FALSE, &arch_info_struct[25]), | |
266abb8f NS |
79 | |
80 | /* Legacy names for CF architectures */ | |
9840d27e KH |
81 | N(bfd_mach_mcf_isa_a_nodiv, "m68k:5200", FALSE, &arch_info_struct[26]), |
82 | N(bfd_mach_mcf_isa_a_mac,"m68k:5206e", FALSE, &arch_info_struct[27]), | |
83 | N(bfd_mach_mcf_isa_a_mac, "m68k:5307", FALSE, &arch_info_struct[28]), | |
84 | N(bfd_mach_mcf_isa_b_nousp_mac, "m68k:5407", FALSE, &arch_info_struct[29]), | |
85 | N(bfd_mach_mcf_isa_aplus_emac, "m68k:528x", FALSE, &arch_info_struct[30]), | |
86 | N(bfd_mach_mcf_isa_aplus_emac, "m68k:521x", FALSE, &arch_info_struct[31]), | |
87 | N(bfd_mach_mcf_isa_a_emac, "m68k:5249", FALSE, &arch_info_struct[32]), | |
0b2e31dc | 88 | N(bfd_mach_mcf_isa_b_float_emac, "m68k:547x", |
266abb8f | 89 | FALSE, &arch_info_struct[33]), |
9840d27e KH |
90 | N(bfd_mach_mcf_isa_b_float_emac, "m68k:548x", |
91 | FALSE, &arch_info_struct[34]), | |
0b2e31dc | 92 | N(bfd_mach_mcf_isa_b_float_emac, "m68k:cfv4e", FALSE, 0), |
3cac17ae | 93 | }; |
252b5132 RH |
94 | |
95 | const bfd_arch_info_type bfd_m68k_arch = | |
b34976b6 | 96 | N(0, "m68k", TRUE, &arch_info_struct[0]); |
266abb8f NS |
97 | |
98 | /* Table indexed by bfd_mach_arch number indicating which | |
99 | architectural features are supported. */ | |
100 | static const unsigned m68k_arch_features[] = | |
101 | { | |
102 | 0, | |
103 | m68000|m68881|m68851, | |
104 | m68000|m68881|m68851, | |
105 | m68010|m68881|m68851, | |
106 | m68020|m68881|m68851, | |
107 | m68030|m68881|m68851, | |
108 | m68040|m68881|m68851, | |
109 | m68060|m68881|m68851, | |
110 | cpu32|m68881, | |
3bdcfdf4 | 111 | fido_a|m68881, |
266abb8f NS |
112 | mcfisa_a, |
113 | mcfisa_a|mcfhwdiv, | |
114 | mcfisa_a|mcfhwdiv|mcfmac, | |
115 | mcfisa_a|mcfhwdiv|mcfemac, | |
266abb8f NS |
116 | mcfisa_a|mcfisa_aa|mcfhwdiv|mcfusp, |
117 | mcfisa_a|mcfisa_aa|mcfhwdiv|mcfusp|mcfmac, | |
118 | mcfisa_a|mcfisa_aa|mcfhwdiv|mcfusp|mcfemac, | |
119 | mcfisa_a|mcfhwdiv|mcfisa_b, | |
120 | mcfisa_a|mcfhwdiv|mcfisa_b|mcfmac, | |
121 | mcfisa_a|mcfhwdiv|mcfisa_b|mcfemac, | |
0b2e31dc NS |
122 | mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp, |
123 | mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|mcfmac, | |
124 | mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|mcfemac, | |
266abb8f NS |
125 | mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|cfloat, |
126 | mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|cfloat|mcfmac, | |
127 | mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|cfloat|mcfemac, | |
128 | }; | |
129 | ||
130 | /* Return the count of bits set in MASK */ | |
131 | static unsigned | |
132 | bit_count (unsigned mask) | |
133 | { | |
134 | unsigned ix; | |
135 | ||
136 | for (ix = 0; mask; ix++) | |
137 | /* Clear the LSB set */ | |
138 | mask ^= mask & -mask; | |
139 | return ix; | |
140 | } | |
141 | ||
142 | /* Return the architectural features supported by MACH */ | |
143 | ||
144 | unsigned | |
145 | bfd_m68k_mach_to_features (int mach) | |
146 | { | |
147 | if ((unsigned)mach | |
148 | >= sizeof (m68k_arch_features) / sizeof (m68k_arch_features[0])) | |
149 | mach = 0; | |
150 | return m68k_arch_features[mach]; | |
151 | } | |
152 | ||
153 | /* Return the bfd machine that most closely represents the | |
154 | architectural features. We find the machine with the smallest | |
155 | number of additional features. If there is no such machine, we | |
156 | find the one with the smallest number of missing features. */ | |
157 | ||
158 | int bfd_m68k_features_to_mach (unsigned features) | |
159 | { | |
160 | int superset = 0, subset = 0; | |
161 | unsigned extra = 99, missing = 99; | |
162 | unsigned ix; | |
163 | ||
164 | for (ix = 0; | |
165 | ix != sizeof (m68k_arch_features) / sizeof (m68k_arch_features[0]); | |
166 | ix++) | |
167 | { | |
168 | unsigned this_extra, this_missing; | |
169 | ||
170 | if (m68k_arch_features[ix] == features) | |
171 | return ix; | |
172 | this_extra = bit_count (m68k_arch_features[ix] & ~features); | |
173 | if (this_extra < extra) | |
174 | { | |
175 | extra = this_extra; | |
176 | superset = ix; | |
177 | } | |
178 | ||
179 | this_missing = bit_count (features & ~m68k_arch_features[ix]); | |
180 | if (this_missing < missing) | |
181 | { | |
182 | missing = this_missing; | |
183 | superset = ix; | |
184 | } | |
185 | } | |
186 | return superset ? superset : subset; | |
187 | } | |
0b2e31dc NS |
188 | |
189 | static const bfd_arch_info_type * | |
190 | bfd_m68k_compatible (const bfd_arch_info_type *a, | |
191 | const bfd_arch_info_type *b) | |
192 | { | |
193 | if (a->arch != b->arch) | |
194 | return NULL; | |
195 | ||
196 | if (a->bits_per_word != b->bits_per_word) | |
197 | return NULL; | |
198 | ||
199 | if (!a->mach) | |
200 | return b; | |
201 | if (!b->mach) | |
202 | return a; | |
203 | ||
204 | if (a->mach <= bfd_mach_m68060 && b->mach <= bfd_mach_m68060) | |
205 | /* Merge m68k machine. */ | |
206 | return a->mach > b->mach ? a : b; | |
9840d27e | 207 | else if (a->mach >= bfd_mach_cpu32 && b->mach >= bfd_mach_cpu32) |
0b2e31dc | 208 | { |
9840d27e | 209 | /* Merge the machine features. */ |
0b2e31dc NS |
210 | unsigned features = (bfd_m68k_mach_to_features (a->mach) |
211 | | bfd_m68k_mach_to_features (b->mach)); | |
0b2e31dc | 212 | |
9840d27e KH |
213 | /* CPU32 and Coldfire are incompatible. */ |
214 | if ((~features & (cpu32 | mcfisa_a)) == 0) | |
215 | return NULL; | |
216 | ||
3bdcfdf4 KH |
217 | /* Fido and Coldfire are incompatible. */ |
218 | if ((~features & (fido_a | mcfisa_a)) == 0) | |
219 | return NULL; | |
220 | ||
a9d34880 RS |
221 | /* ISA A+ and ISA B are incompatible. */ |
222 | if ((~features & (mcfisa_aa | mcfisa_b)) == 0) | |
223 | return NULL; | |
224 | ||
225 | /* MAC and EMAC code cannot be merged. */ | |
226 | if ((~features & (mcfmac | mcfemac)) == 0) | |
227 | return NULL; | |
228 | ||
3bdcfdf4 KH |
229 | /* CPU32 is compatible with Fido except that Fido does not |
230 | support tbl instructions. Warn when the user wants to mix | |
231 | the two. */ | |
232 | if ((a->mach == bfd_mach_cpu32 && b->mach == bfd_mach_fido) | |
233 | || (a->mach == bfd_mach_fido && b->mach == bfd_mach_cpu32)) | |
234 | { | |
235 | static int cpu32_fido_mix_warning; | |
236 | if (!cpu32_fido_mix_warning) | |
237 | { | |
238 | cpu32_fido_mix_warning = 1; | |
239 | (*_bfd_error_handler) ("warning: linking CPU32 objects with fido objects"); | |
240 | } | |
241 | return bfd_lookup_arch (a->arch, | |
242 | bfd_m68k_features_to_mach (fido_a | m68881)); | |
243 | } | |
244 | ||
a9d34880 | 245 | return bfd_lookup_arch (a->arch, bfd_m68k_features_to_mach (features)); |
0b2e31dc NS |
246 | } |
247 | else | |
248 | /* They are incompatible. */ | |
249 | return NULL; | |
250 | } |