| 1 | /* ARC-specific header file for PLT support. |
| 2 | Copyright (C) 2016-2018 Free Software Foundation, Inc. |
| 3 | Contributed by Cupertino Miranda (cmiranda@synopsys.com). |
| 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 | #ifndef ARC_PLT_H |
| 23 | #define ARC_PLT_H |
| 24 | |
| 25 | #include <stdint.h> |
| 26 | |
| 27 | /* Instructions appear in memory as a sequence of half-words (16 bit); |
| 28 | individual half-words are represented on the target in target byte order. |
| 29 | We use 'unsigned short' on the host to represent the PLT templates, |
| 30 | and translate to target byte order as we copy to the target. */ |
| 31 | typedef uint16_t insn_hword; |
| 32 | |
| 33 | enum plt_reloc_symbol |
| 34 | { |
| 35 | LAST_RELOC = 0, |
| 36 | |
| 37 | SGOT = 1, |
| 38 | |
| 39 | RELATIVE = (1 << 8), |
| 40 | RELATIVE_INSN_32 = (1 << 9), |
| 41 | RELATIVE_INSN_24 = (1 << 10), |
| 42 | |
| 43 | MIDDLE_ENDIAN = (1 << 11) |
| 44 | }; |
| 45 | |
| 46 | #define IS_RELATIVE(S) ((S & (RELATIVE | RELATIVE_INSN_24 | RELATIVE_INSN_32)) != 0) |
| 47 | #define IS_INSN_32(S) ((S & RELATIVE_INSN_32) != 0) |
| 48 | #define IS_INSN_24(S) ((S & RELATIVE_INSN_24) != 0) |
| 49 | #define IS_MIDDLE_ENDIAN(S) ((S & MIDDLE_ENDIAN) != 0) |
| 50 | #define SYM_ONLY(S) (S & 0xFF) |
| 51 | |
| 52 | struct plt_reloc |
| 53 | { |
| 54 | bfd_vma offset; |
| 55 | bfd_vma size; |
| 56 | bfd_vma mask; |
| 57 | enum plt_reloc_symbol symbol; |
| 58 | bfd_vma addend; |
| 59 | }; |
| 60 | |
| 61 | |
| 62 | #define PLT_TYPE_START(NAME) NAME, |
| 63 | #define PLT_TYPE_END(NAME) |
| 64 | #define PLT_ENTRY(...) |
| 65 | #define PLT_ELEM(...) |
| 66 | #define ENTRY_RELOC(...) |
| 67 | #define ELEM_RELOC(...) |
| 68 | |
| 69 | enum plt_types_enum |
| 70 | { |
| 71 | PLT_START = -1, |
| 72 | #include "arc-plt.def" |
| 73 | PLT_MAX |
| 74 | }; |
| 75 | |
| 76 | #undef PLT_TYPE_START |
| 77 | #undef PLT_TYPE_END |
| 78 | #undef PLT_ENTRY |
| 79 | #undef PLT_ELEM |
| 80 | #undef ENTRY_RELOC |
| 81 | #undef ELEM_RELOC |
| 82 | |
| 83 | typedef insn_hword insn_hword_array[]; |
| 84 | |
| 85 | struct plt_version_t |
| 86 | { |
| 87 | const insn_hword_array *entry; |
| 88 | const bfd_vma entry_size; |
| 89 | const insn_hword_array *elem; |
| 90 | const bfd_vma elem_size; |
| 91 | |
| 92 | const struct plt_reloc *entry_relocs; |
| 93 | const struct plt_reloc *elem_relocs; |
| 94 | }; |
| 95 | |
| 96 | #define PLT_TYPE_START(NAME) \ |
| 97 | const insn_hword NAME##_plt_entry[] = { |
| 98 | #define PLT_TYPE_END(NAME) }; |
| 99 | #define PLT_ENTRY(...) __VA_ARGS__, |
| 100 | #define PLT_ELEM(...) |
| 101 | #define ENTRY_RELOC(...) |
| 102 | #define ELEM_RELOC(...) |
| 103 | |
| 104 | #include "arc-plt.def" |
| 105 | |
| 106 | #undef PLT_TYPE_START |
| 107 | #undef PLT_TYPE_END |
| 108 | #undef PLT_ENTRY |
| 109 | #undef PLT_ELEM |
| 110 | #undef ENTRY_RELOC |
| 111 | #undef ELEM_RELOC |
| 112 | |
| 113 | #define PLT_TYPE_START(NAME) \ |
| 114 | const struct plt_reloc NAME##_plt_entry_relocs[] = { |
| 115 | #define PLT_TYPE_END(NAME) \ |
| 116 | {0, 0, 0, LAST_RELOC, 0} \ |
| 117 | }; |
| 118 | #define PLT_ENTRY(...) |
| 119 | #define PLT_ELEM(...) |
| 120 | #define ENTRY_RELOC(...) { __VA_ARGS__ }, |
| 121 | #define ELEM_RELOC(...) |
| 122 | |
| 123 | #include "arc-plt.def" |
| 124 | |
| 125 | #undef PLT_TYPE_START |
| 126 | #undef PLT_TYPE_END |
| 127 | #undef PLT_ENTRY |
| 128 | #undef PLT_ELEM |
| 129 | #undef ENTRY_RELOC |
| 130 | #undef ELEM_RELOC |
| 131 | |
| 132 | |
| 133 | #define PLT_TYPE_START(NAME) \ |
| 134 | const insn_hword NAME##_plt_elem[] = { |
| 135 | #define PLT_TYPE_END(NAME) }; |
| 136 | #define PLT_ENTRY(...) |
| 137 | #define PLT_ELEM(...) __VA_ARGS__, |
| 138 | #define ENTRY_RELOC(...) |
| 139 | #define ELEM_RELOC(...) |
| 140 | |
| 141 | #include "arc-plt.def" |
| 142 | |
| 143 | #undef PLT_TYPE_START |
| 144 | #undef PLT_TYPE_END |
| 145 | #undef PLT_ENTRY |
| 146 | #undef PLT_ELEM |
| 147 | #undef ENTRY_RELOC |
| 148 | #undef ELEM_RELOC |
| 149 | |
| 150 | #define PLT_TYPE_START(NAME) \ |
| 151 | const struct plt_reloc NAME##_plt_elem_relocs[] = { |
| 152 | #define PLT_TYPE_END(NAME) \ |
| 153 | {0, 0, 0, LAST_RELOC, 0} \ |
| 154 | }; |
| 155 | #define PLT_ENTRY(...) |
| 156 | #define PLT_ELEM(...) |
| 157 | #define ENTRY_RELOC(...) |
| 158 | #define ELEM_RELOC(...) { __VA_ARGS__ }, |
| 159 | |
| 160 | #include "arc-plt.def" |
| 161 | |
| 162 | #undef PLT_TYPE_START |
| 163 | #undef PLT_TYPE_END |
| 164 | #undef PLT_ENTRY |
| 165 | #undef PLT_ELEM |
| 166 | #undef ENTRY_RELOC |
| 167 | #undef ELEM_RELOC |
| 168 | |
| 169 | |
| 170 | #define PLT_TYPE_START(NAME) \ |
| 171 | { \ |
| 172 | .entry = &NAME##_plt_entry, \ |
| 173 | .entry_size = sizeof (NAME##_plt_entry), \ |
| 174 | .elem = &NAME##_plt_elem, \ |
| 175 | .elem_size = sizeof (NAME##_plt_elem), \ |
| 176 | .entry_relocs = NAME##_plt_entry_relocs, \ |
| 177 | .elem_relocs = NAME##_plt_elem_relocs |
| 178 | #define PLT_TYPE_END(NAME) }, |
| 179 | #define PLT_ENTRY(...) |
| 180 | #define PLT_ELEM(...) |
| 181 | #define ENTRY_RELOC(...) |
| 182 | #define ELEM_RELOC(...) |
| 183 | struct plt_version_t plt_versions[PLT_MAX] = { |
| 184 | |
| 185 | #include "arc-plt.def" |
| 186 | |
| 187 | }; |
| 188 | #undef PLT_TYPE_START |
| 189 | #undef PLT_TYPE_END |
| 190 | #undef PLT_ENTRY |
| 191 | #undef PLT_ELEM |
| 192 | #undef ENTRY_RELOC |
| 193 | #undef ELEM_RELOC |
| 194 | |
| 195 | |
| 196 | #endif /* ARC_PLT_H */ |