1 /* BFD support for AArch64. 2 Copyright (C) 2009-2016 Free Software Foundation, Inc. 3 Contributed by ARM Ltd. 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; see the file COPYING3. If not, 19 see <http://www.gnu.org/licenses/>. */ 20 21 #include "sysdep.h" 22 #include "bfd.h" 23 #include "libbfd.h" 24 #include "libiberty.h" 25 26 /* This routine is provided two arch_infos and works out which Aarch64 27 machine which would be compatible with both and returns a pointer 28 to its info structure. */ 29 30 static const bfd_arch_info_type * 31 compatible (const bfd_arch_info_type * a, const bfd_arch_info_type * b) 32 { 33 /* If a & b are for different architecture we can do nothing. */ 34 if (a->arch != b->arch) 35 return NULL; 36 37 /* If a & b are for the same machine then all is well. */ 38 if (a->mach == b->mach) 39 return a; 40 41 /* Don't allow mixing ilp32 with lp64. */ 42 if ((a->mach & bfd_mach_aarch64_ilp32) != (b->mach & bfd_mach_aarch64_ilp32)) 43 return NULL; 44 45 /* Otherwise if either a or b is the 'default' machine 46 then it can be polymorphed into the other. */ 47 if (a->the_default) 48 return b; 49 50 if (b->the_default) 51 return a; 52 53 /* So far all newer cores are 54 supersets of previous cores. */ 55 if (a->mach < b->mach) 56 return b; 57 else if (a->mach > b->mach) 58 return a; 59 60 /* Never reached! */ 61 return NULL; 62 } 63 64 static struct 65 { 66 unsigned int mach; 67 char *name; 68 } 69 processors[] = 70 { 71 /* These two are example CPUs supported in GCC, once we have real 72 CPUs they will be removed. */ 73 { bfd_mach_aarch64, "example-1" }, 74 { bfd_mach_aarch64, "example-2" } 75 }; 76 77 static bfd_boolean 78 scan (const struct bfd_arch_info *info, const char *string) 79 { 80 int i; 81 82 /* First test for an exact match. */ 83 if (strcasecmp (string, info->printable_name) == 0) 84 return TRUE; 85 86 /* Next check for a processor name instead of an Architecture name. */ 87 for (i = sizeof (processors) / sizeof (processors[0]); i--;) 88 { 89 if (strcasecmp (string, processors[i].name) == 0) 90 break; 91 } 92 93 if (i != -1 && info->mach == processors[i].mach) 94 return TRUE; 95 96 /* Finally check for the default architecture. */ 97 if (strcasecmp (string, "aarch64") == 0) 98 return info->the_default; 99 100 return FALSE; 101 } 102 103 #define N(NUMBER, PRINT, DEFAULT, NEXT) \ 104 { 64, 64, 8, bfd_arch_aarch64, NUMBER, \ 105 "aarch64", PRINT, 4, DEFAULT, compatible, scan, \ 106 bfd_arch_default_fill, NEXT } 107 108 static const bfd_arch_info_type bfd_aarch64_arch_ilp32 = 109 N (bfd_mach_aarch64_ilp32, "aarch64:ilp32", FALSE, NULL); 110 111 const bfd_arch_info_type bfd_aarch64_arch = 112 N (0, "aarch64", TRUE, &bfd_aarch64_arch_ilp32); 113 114 bfd_boolean 115 bfd_is_aarch64_special_symbol_name (const char *name, int type) 116 { 117 if (!name || name[0] != '$') 118 return FALSE; 119 if (name[1] == 'x' || name[1] == 'd') 120 type &= BFD_AARCH64_SPECIAL_SYM_TYPE_MAP; 121 else if (name[1] == 'm' || name[1] == 'f' || name[1] == 'p') 122 type &= BFD_AARCH64_SPECIAL_SYM_TYPE_TAG; 123 else 124 return FALSE; 125 126 return (type != 0 && (name[2] == 0 || name[2] == '.')); 127 } 128
