1 /* BFD library support routines for the Renesas / SuperH SH architecture. 2 Copyright (C) 1993-2024 Free Software Foundation, Inc. 3 Hacked by Steve Chamberlain of Cygnus Support. 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 #include "../opcodes/sh-opc.h" 26 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 } 45 46 static const bfd_arch_info_type arch_info_struct[] = 47 { 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) 67 }; 68 69 const bfd_arch_info_type bfd_sh_arch = 70 N (bfd_mach_sh, "sh", true, arch_info_struct + 0); 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 { 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 }, 90 { bfd_mach_sh2a_or_sh3e, arch_sh2a_or_sh3e, arch_sh2a_or_sh3e_up }, 91 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 }, 100 { bfd_mach_sh4_nommu_nofpu, arch_sh4_nommu_nofpu, arch_sh4_nommu_nofpu_up }, 101 { bfd_mach_sh4a_nofpu, arch_sh4a_nofpu, arch_sh4a_nofpu_up }, 102 { 0, 0, 0 } /* Terminator. */ 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; 113 114 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++; 119 120 return SH_ARCH_UNKNOWN_ARCH; 121 } 122 123 124 /* Convert a BFD mach number into a set of opcodes arch flags 125 describing all the compatible architectures (i.e. arch_up) 126 using the table above. */ 127 128 unsigned int 129 sh_get_arch_up_from_bfd_mach (unsigned long mach) 130 { 131 int i = 0; 132 133 while (bfd_to_arch_table[i].bfd_mach != 0) 134 if (bfd_to_arch_table[i].bfd_mach == mach) 135 return bfd_to_arch_table[i].arch_up; 136 else 137 i++; 138 139 return SH_ARCH_UNKNOWN_ARCH; 140 } 141 142 143 /* Convert an arbitary arch_set - not necessarily corresponding 144 directly to anything in the table above - to the most generic 145 architecture which supports all the required features, and 146 return the corresponding BFD mach. */ 147 148 unsigned long 149 sh_get_bfd_mach_from_arch_set (unsigned int arch_set) 150 { 151 unsigned long result = 0; 152 unsigned int best = ~arch_set; 153 unsigned int co_mask = ~0; 154 int i = 0; 155 156 /* If arch_set permits variants with no coprocessor then do not allow 157 the other irrelevant co-processor bits to influence the choice: 158 e.g. if dsp is disallowed by arch_set, then the algorithm would 159 prefer fpu variants over nofpu variants because they also disallow 160 dsp - even though the nofpu would be the most correct choice. 161 This assumes that EVERY fpu/dsp variant has a no-coprocessor 162 counter-part, or their non-fpu/dsp instructions do not have the 163 no co-processor bit set. */ 164 if (arch_set & arch_sh_no_co) 165 co_mask = ~(arch_sh_sp_fpu | arch_sh_dp_fpu | arch_sh_has_dsp); 166 167 while (bfd_to_arch_table[i].bfd_mach != 0) 168 { 169 unsigned int try = bfd_to_arch_table[i].arch_up & co_mask; 170 171 /* Conceptually: Find the architecture with the least number 172 of extra features or, if they have the same number, then 173 the greatest number of required features. Disregard 174 architectures where the required features alone do 175 not describe a valid architecture. */ 176 if (((try & ~arch_set) < (best & ~arch_set) 177 || ((try & ~arch_set) == (best & ~arch_set) 178 && (~try & arch_set) < (~best & arch_set))) 179 && SH_MERGE_ARCH_SET_VALID (try, arch_set)) 180 { 181 result = bfd_to_arch_table[i].bfd_mach; 182 best = try; 183 } 184 185 i++; 186 } 187 188 /* This might happen if a new variant is added to sh-opc.h 189 but no corresponding entry is added to the table above. */ 190 BFD_ASSERT (result != 0); 191 192 return result; 193 } 194
Indexes created Sun Mar 01 05:31:48 UTC 2026