| 1 | /* BFD support for AArch64. |
| 2 | Copyright (C) 2009-2015 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 | } |