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ef230218 | 1 | /* BFD library support routines for the Renesas / SuperH SH architecture. |
82704155 | 2 | Copyright (C) 1993-2019 Free Software Foundation, Inc. |
252b5132 RH |
3 | Hacked by Steve Chamberlain of Cygnus Support. |
4 | ||
5177500f | 5 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 6 | |
5177500f NC |
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 | |
cd123cb7 | 9 | the Free Software Foundation; either version 3 of the License, or |
5177500f | 10 | (at your option) any later version. |
252b5132 | 11 | |
5177500f NC |
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. | |
252b5132 | 16 | |
5177500f NC |
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 | |
cd123cb7 NC |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
20 | MA 02110-1301, USA. */ | |
252b5132 | 21 | |
252b5132 | 22 | #include "sysdep.h" |
3db64b00 | 23 | #include "bfd.h" |
252b5132 | 24 | #include "libbfd.h" |
f6f9408f | 25 | #include "../opcodes/sh-opc.h" |
252b5132 | 26 | |
aebcfb76 NC |
27 | |
28 | #define N(NUMBER, PRINT, DEFAULT, NEXT) \ | |
29 | { \ | |
30 | 32, /* Bits in a word. */ \ | |
31 | 32, /* Bits in an address. */ \ | |
32 | 8, /* Bits in a byte. */ \ | |
33 | bfd_arch_sh, \ | |
34 | NUMBER, \ | |
35 | "sh", \ | |
36 | PRINT, \ | |
37 | 1, /* Section alignment power. */ \ | |
38 | DEFAULT, \ | |
39 | bfd_default_compatible, \ | |
40 | bfd_default_scan, \ | |
41 | bfd_arch_default_fill, \ | |
42 | NEXT, \ | |
43 | 0 /* Maximum offset of a reloc from the start of an insn. */ \ | |
44 | } | |
252b5132 | 45 | |
71f6b586 | 46 | static const bfd_arch_info_type arch_info_struct[] = |
252b5132 | 47 | { |
aebcfb76 NC |
48 | N (bfd_mach_sh2, "sh2", FALSE, arch_info_struct + 1), |
49 | N (bfd_mach_sh2e, "sh2e", FALSE, arch_info_struct + 2), | |
50 | N (bfd_mach_sh_dsp, "sh-dsp", FALSE, arch_info_struct + 3), | |
51 | N (bfd_mach_sh3, "sh3", FALSE, arch_info_struct + 4), | |
52 | N (bfd_mach_sh3_nommu, "sh3-nommu", FALSE, arch_info_struct + 5), | |
53 | N (bfd_mach_sh3_dsp, "sh3-dsp", FALSE, arch_info_struct + 6), | |
54 | N (bfd_mach_sh3e, "sh3e", FALSE, arch_info_struct + 7), | |
55 | N (bfd_mach_sh4, "sh4", FALSE, arch_info_struct + 8), | |
56 | N (bfd_mach_sh4a, "sh4a", FALSE, arch_info_struct + 9), | |
57 | N (bfd_mach_sh4al_dsp, "sh4al-dsp", FALSE, arch_info_struct + 10), | |
58 | N (bfd_mach_sh4_nofpu, "sh4-nofpu", FALSE, arch_info_struct + 11), | |
59 | N (bfd_mach_sh4_nommu_nofpu, "sh4-nommu-nofpu", FALSE, arch_info_struct + 12), | |
60 | N (bfd_mach_sh4a_nofpu, "sh4a-nofpu", FALSE, arch_info_struct + 13), | |
61 | N (bfd_mach_sh2a, "sh2a", FALSE, arch_info_struct + 14), | |
62 | N (bfd_mach_sh2a_nofpu, "sh2a-nofpu", FALSE, arch_info_struct + 15), | |
63 | N (bfd_mach_sh2a_nofpu_or_sh4_nommu_nofpu, "sh2a-nofpu-or-sh4-nommu-nofpu", FALSE, arch_info_struct + 16), | |
64 | N (bfd_mach_sh2a_nofpu_or_sh3_nommu, "sh2a-nofpu-or-sh3-nommu", FALSE, arch_info_struct + 17), | |
65 | N (bfd_mach_sh2a_or_sh4, "sh2a-or-sh4", FALSE, arch_info_struct + 18), | |
66 | N (bfd_mach_sh2a_or_sh3e, "sh2a-or-sh3e", FALSE, NULL) | |
252b5132 RH |
67 | }; |
68 | ||
69 | const bfd_arch_info_type bfd_sh_arch = | |
aebcfb76 | 70 | N (bfd_mach_sh, "sh", TRUE, arch_info_struct + 0); |
f6f9408f JR |
71 | |
72 | /* This table defines the mappings from the BFD internal numbering | |
73 | system to the opcodes internal flags system. | |
74 | It is used by the functions defined below. | |
75 | The prototypes for these SH specific functions are found in | |
76 | sh-opc.h . */ | |
77 | ||
78 | static struct { unsigned long bfd_mach, arch, arch_up; } bfd_to_arch_table[] = | |
79 | { | |
07d6d2b8 AM |
80 | { bfd_mach_sh, arch_sh1, arch_sh_up }, |
81 | { bfd_mach_sh2, arch_sh2, arch_sh2_up }, | |
82 | { bfd_mach_sh2e, arch_sh2e, arch_sh2e_up }, | |
83 | { bfd_mach_sh_dsp, arch_sh_dsp, arch_sh_dsp_up }, | |
84 | { bfd_mach_sh2a, arch_sh2a, arch_sh2a_up }, | |
85 | { bfd_mach_sh2a_nofpu, arch_sh2a_nofpu, arch_sh2a_nofpu_up }, | |
86 | ||
87 | { bfd_mach_sh2a_nofpu_or_sh4_nommu_nofpu, arch_sh2a_nofpu_or_sh4_nommu_nofpu, arch_sh2a_nofpu_or_sh4_nommu_nofpu_up }, | |
88 | { bfd_mach_sh2a_nofpu_or_sh3_nommu, arch_sh2a_nofpu_or_sh3_nommu, arch_sh2a_nofpu_or_sh3_nommu_up }, | |
89 | { bfd_mach_sh2a_or_sh4, arch_sh2a_or_sh4, arch_sh2a_or_sh4_up }, | |
e38bc3b5 | 90 | { bfd_mach_sh2a_or_sh3e, arch_sh2a_or_sh3e, arch_sh2a_or_sh3e_up }, |
68ffbac6 | 91 | |
07d6d2b8 AM |
92 | { bfd_mach_sh3, arch_sh3, arch_sh3_up }, |
93 | { bfd_mach_sh3_nommu, arch_sh3_nommu, arch_sh3_nommu_up }, | |
94 | { bfd_mach_sh3_dsp, arch_sh3_dsp, arch_sh3_dsp_up }, | |
95 | { bfd_mach_sh3e, arch_sh3e, arch_sh3e_up }, | |
96 | { bfd_mach_sh4, arch_sh4, arch_sh4_up }, | |
97 | { bfd_mach_sh4a, arch_sh4a, arch_sh4a_up }, | |
98 | { bfd_mach_sh4al_dsp, arch_sh4al_dsp, arch_sh4al_dsp_up }, | |
99 | { bfd_mach_sh4_nofpu, arch_sh4_nofpu, arch_sh4_nofpu_up }, | |
f6f9408f | 100 | { bfd_mach_sh4_nommu_nofpu, arch_sh4_nommu_nofpu, arch_sh4_nommu_nofpu_up }, |
07d6d2b8 AM |
101 | { bfd_mach_sh4a_nofpu, arch_sh4a_nofpu, arch_sh4a_nofpu_up }, |
102 | { 0, 0, 0 } /* Terminator. */ | |
f6f9408f JR |
103 | }; |
104 | ||
105 | ||
106 | /* Convert a BFD mach number into the right opcodes arch flags | |
107 | using the table above. */ | |
108 | ||
109 | unsigned int | |
110 | sh_get_arch_from_bfd_mach (unsigned long mach) | |
111 | { | |
112 | int i = 0; | |
e38bc3b5 | 113 | |
f6f9408f JR |
114 | while (bfd_to_arch_table[i].bfd_mach != 0) |
115 | if (bfd_to_arch_table[i].bfd_mach == mach) | |
116 | return bfd_to_arch_table[i].arch; | |
117 | else | |
118 | i++; | |
119 | ||
e38bc3b5 | 120 | /* Machine not found. */ |
f6f9408f JR |
121 | BFD_FAIL(); |
122 | ||
123 | return SH_ARCH_UNKNOWN_ARCH; | |
124 | } | |
125 | ||
126 | ||
127 | /* Convert a BFD mach number into a set of opcodes arch flags | |
128 | describing all the compatible architectures (i.e. arch_up) | |
129 | using the table above. */ | |
130 | ||
131 | unsigned int | |
132 | sh_get_arch_up_from_bfd_mach (unsigned long mach) | |
133 | { | |
134 | int i = 0; | |
e38bc3b5 | 135 | |
f6f9408f JR |
136 | while (bfd_to_arch_table[i].bfd_mach != 0) |
137 | if (bfd_to_arch_table[i].bfd_mach == mach) | |
138 | return bfd_to_arch_table[i].arch_up; | |
139 | else | |
140 | i++; | |
141 | ||
e38bc3b5 | 142 | /* Machine not found. */ |
f6f9408f JR |
143 | BFD_FAIL(); |
144 | ||
145 | return SH_ARCH_UNKNOWN_ARCH; | |
146 | } | |
147 | ||
148 | ||
149 | /* Convert an arbitary arch_set - not necessarily corresponding | |
150 | directly to anything in the table above - to the most generic | |
151 | architecture which supports all the required features, and | |
152 | return the corresponding BFD mach. */ | |
153 | ||
154 | unsigned long | |
155 | sh_get_bfd_mach_from_arch_set (unsigned int arch_set) | |
156 | { | |
157 | unsigned long result = 0; | |
158 | unsigned int best = ~arch_set; | |
159 | unsigned int co_mask = ~0; | |
160 | int i = 0; | |
161 | ||
162 | /* If arch_set permits variants with no coprocessor then do not allow | |
163 | the other irrelevant co-processor bits to influence the choice: | |
164 | e.g. if dsp is disallowed by arch_set, then the algorithm would | |
165 | prefer fpu variants over nofpu variants because they also disallow | |
166 | dsp - even though the nofpu would be the most correct choice. | |
167 | This assumes that EVERY fpu/dsp variant has a no-coprocessor | |
168 | counter-part, or their non-fpu/dsp instructions do not have the | |
169 | no co-processor bit set. */ | |
170 | if (arch_set & arch_sh_no_co) | |
171 | co_mask = ~(arch_sh_sp_fpu | arch_sh_dp_fpu | arch_sh_has_dsp); | |
172 | ||
173 | while (bfd_to_arch_table[i].bfd_mach != 0) | |
174 | { | |
175 | unsigned int try = bfd_to_arch_table[i].arch_up & co_mask; | |
176 | ||
177 | /* Conceptually: Find the architecture with the least number | |
178 | of extra features or, if they have the same number, then | |
179 | the greatest number of required features. Disregard | |
07d6d2b8 | 180 | architectures where the required features alone do |
f6f9408f JR |
181 | not describe a valid architecture. */ |
182 | if (((try & ~arch_set) < (best & ~arch_set) | |
183 | || ((try & ~arch_set) == (best & ~arch_set) | |
184 | && (~try & arch_set) < (~best & arch_set))) | |
185 | && SH_MERGE_ARCH_SET_VALID (try, arch_set)) | |
186 | { | |
187 | result = bfd_to_arch_table[i].bfd_mach; | |
188 | best = try; | |
189 | } | |
190 | ||
191 | i++; | |
192 | } | |
193 | ||
194 | /* This might happen if a new variant is added to sh-opc.h | |
195 | but no corresponding entry is added to the table above. */ | |
196 | BFD_ASSERT (result != 0); | |
197 | ||
198 | return result; | |
199 | } |