| 1 | /* IA-64 support for 64-bit ELF |
| 2 | Copyright (C) 1998-2014 Free Software Foundation, Inc. |
| 3 | Contributed by David Mosberger-Tang <davidm@hpl.hp.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 | #include "sysdep.h" |
| 23 | #include "bfd.h" |
| 24 | #include "libbfd.h" |
| 25 | #include "elf-bfd.h" |
| 26 | #include "opcode/ia64.h" |
| 27 | #include "elf/ia64.h" |
| 28 | #include "objalloc.h" |
| 29 | #include "hashtab.h" |
| 30 | #include "bfd_stdint.h" |
| 31 | #include "elfxx-ia64.h" |
| 32 | |
| 33 | /* THE RULES for all the stuff the linker creates -- |
| 34 | |
| 35 | GOT Entries created in response to LTOFF or LTOFF_FPTR |
| 36 | relocations. Dynamic relocs created for dynamic |
| 37 | symbols in an application; REL relocs for locals |
| 38 | in a shared library. |
| 39 | |
| 40 | FPTR The canonical function descriptor. Created for local |
| 41 | symbols in applications. Descriptors for dynamic symbols |
| 42 | and local symbols in shared libraries are created by |
| 43 | ld.so. Thus there are no dynamic relocs against these |
| 44 | objects. The FPTR relocs for such _are_ passed through |
| 45 | to the dynamic relocation tables. |
| 46 | |
| 47 | FULL_PLT Created for a PCREL21B relocation against a dynamic symbol. |
| 48 | Requires the creation of a PLTOFF entry. This does not |
| 49 | require any dynamic relocations. |
| 50 | |
| 51 | PLTOFF Created by PLTOFF relocations. For local symbols, this |
| 52 | is an alternate function descriptor, and in shared libraries |
| 53 | requires two REL relocations. Note that this cannot be |
| 54 | transformed into an FPTR relocation, since it must be in |
| 55 | range of the GP. For dynamic symbols, this is a function |
| 56 | descriptor for a MIN_PLT entry, and requires one IPLT reloc. |
| 57 | |
| 58 | MIN_PLT Created by PLTOFF entries against dynamic symbols. This |
| 59 | does not require dynamic relocations. */ |
| 60 | |
| 61 | /* ia64-specific relocation. */ |
| 62 | |
| 63 | #define NELEMS(a) ((int) (sizeof (a) / sizeof ((a)[0]))) |
| 64 | |
| 65 | /* Perform a relocation. Not much to do here as all the hard work is |
| 66 | done in elfNN_ia64_final_link_relocate. */ |
| 67 | static bfd_reloc_status_type |
| 68 | ia64_elf_reloc (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc, |
| 69 | asymbol *sym ATTRIBUTE_UNUSED, |
| 70 | PTR data ATTRIBUTE_UNUSED, asection *input_section, |
| 71 | bfd *output_bfd, char **error_message) |
| 72 | { |
| 73 | if (output_bfd) |
| 74 | { |
| 75 | reloc->address += input_section->output_offset; |
| 76 | return bfd_reloc_ok; |
| 77 | } |
| 78 | |
| 79 | if (input_section->flags & SEC_DEBUGGING) |
| 80 | return bfd_reloc_continue; |
| 81 | |
| 82 | *error_message = "Unsupported call to ia64_elf_reloc"; |
| 83 | return bfd_reloc_notsupported; |
| 84 | } |
| 85 | |
| 86 | #define IA64_HOWTO(TYPE, NAME, SIZE, PCREL, IN) \ |
| 87 | HOWTO (TYPE, 0, SIZE, 0, PCREL, 0, complain_overflow_signed, \ |
| 88 | ia64_elf_reloc, NAME, FALSE, 0, -1, IN) |
| 89 | |
| 90 | /* This table has to be sorted according to increasing number of the |
| 91 | TYPE field. */ |
| 92 | static reloc_howto_type ia64_howto_table[] = |
| 93 | { |
| 94 | IA64_HOWTO (R_IA64_NONE, "NONE", 0, FALSE, TRUE), |
| 95 | |
| 96 | IA64_HOWTO (R_IA64_IMM14, "IMM14", 0, FALSE, TRUE), |
| 97 | IA64_HOWTO (R_IA64_IMM22, "IMM22", 0, FALSE, TRUE), |
| 98 | IA64_HOWTO (R_IA64_IMM64, "IMM64", 0, FALSE, TRUE), |
| 99 | IA64_HOWTO (R_IA64_DIR32MSB, "DIR32MSB", 2, FALSE, TRUE), |
| 100 | IA64_HOWTO (R_IA64_DIR32LSB, "DIR32LSB", 2, FALSE, TRUE), |
| 101 | IA64_HOWTO (R_IA64_DIR64MSB, "DIR64MSB", 4, FALSE, TRUE), |
| 102 | IA64_HOWTO (R_IA64_DIR64LSB, "DIR64LSB", 4, FALSE, TRUE), |
| 103 | |
| 104 | IA64_HOWTO (R_IA64_GPREL22, "GPREL22", 0, FALSE, TRUE), |
| 105 | IA64_HOWTO (R_IA64_GPREL64I, "GPREL64I", 0, FALSE, TRUE), |
| 106 | IA64_HOWTO (R_IA64_GPREL32MSB, "GPREL32MSB", 2, FALSE, TRUE), |
| 107 | IA64_HOWTO (R_IA64_GPREL32LSB, "GPREL32LSB", 2, FALSE, TRUE), |
| 108 | IA64_HOWTO (R_IA64_GPREL64MSB, "GPREL64MSB", 4, FALSE, TRUE), |
| 109 | IA64_HOWTO (R_IA64_GPREL64LSB, "GPREL64LSB", 4, FALSE, TRUE), |
| 110 | |
| 111 | IA64_HOWTO (R_IA64_LTOFF22, "LTOFF22", 0, FALSE, TRUE), |
| 112 | IA64_HOWTO (R_IA64_LTOFF64I, "LTOFF64I", 0, FALSE, TRUE), |
| 113 | |
| 114 | IA64_HOWTO (R_IA64_PLTOFF22, "PLTOFF22", 0, FALSE, TRUE), |
| 115 | IA64_HOWTO (R_IA64_PLTOFF64I, "PLTOFF64I", 0, FALSE, TRUE), |
| 116 | IA64_HOWTO (R_IA64_PLTOFF64MSB, "PLTOFF64MSB", 4, FALSE, TRUE), |
| 117 | IA64_HOWTO (R_IA64_PLTOFF64LSB, "PLTOFF64LSB", 4, FALSE, TRUE), |
| 118 | |
| 119 | IA64_HOWTO (R_IA64_FPTR64I, "FPTR64I", 0, FALSE, TRUE), |
| 120 | IA64_HOWTO (R_IA64_FPTR32MSB, "FPTR32MSB", 2, FALSE, TRUE), |
| 121 | IA64_HOWTO (R_IA64_FPTR32LSB, "FPTR32LSB", 2, FALSE, TRUE), |
| 122 | IA64_HOWTO (R_IA64_FPTR64MSB, "FPTR64MSB", 4, FALSE, TRUE), |
| 123 | IA64_HOWTO (R_IA64_FPTR64LSB, "FPTR64LSB", 4, FALSE, TRUE), |
| 124 | |
| 125 | IA64_HOWTO (R_IA64_PCREL60B, "PCREL60B", 0, TRUE, TRUE), |
| 126 | IA64_HOWTO (R_IA64_PCREL21B, "PCREL21B", 0, TRUE, TRUE), |
| 127 | IA64_HOWTO (R_IA64_PCREL21M, "PCREL21M", 0, TRUE, TRUE), |
| 128 | IA64_HOWTO (R_IA64_PCREL21F, "PCREL21F", 0, TRUE, TRUE), |
| 129 | IA64_HOWTO (R_IA64_PCREL32MSB, "PCREL32MSB", 2, TRUE, TRUE), |
| 130 | IA64_HOWTO (R_IA64_PCREL32LSB, "PCREL32LSB", 2, TRUE, TRUE), |
| 131 | IA64_HOWTO (R_IA64_PCREL64MSB, "PCREL64MSB", 4, TRUE, TRUE), |
| 132 | IA64_HOWTO (R_IA64_PCREL64LSB, "PCREL64LSB", 4, TRUE, TRUE), |
| 133 | |
| 134 | IA64_HOWTO (R_IA64_LTOFF_FPTR22, "LTOFF_FPTR22", 0, FALSE, TRUE), |
| 135 | IA64_HOWTO (R_IA64_LTOFF_FPTR64I, "LTOFF_FPTR64I", 0, FALSE, TRUE), |
| 136 | IA64_HOWTO (R_IA64_LTOFF_FPTR32MSB, "LTOFF_FPTR32MSB", 2, FALSE, TRUE), |
| 137 | IA64_HOWTO (R_IA64_LTOFF_FPTR32LSB, "LTOFF_FPTR32LSB", 2, FALSE, TRUE), |
| 138 | IA64_HOWTO (R_IA64_LTOFF_FPTR64MSB, "LTOFF_FPTR64MSB", 4, FALSE, TRUE), |
| 139 | IA64_HOWTO (R_IA64_LTOFF_FPTR64LSB, "LTOFF_FPTR64LSB", 4, FALSE, TRUE), |
| 140 | |
| 141 | IA64_HOWTO (R_IA64_SEGREL32MSB, "SEGREL32MSB", 2, FALSE, TRUE), |
| 142 | IA64_HOWTO (R_IA64_SEGREL32LSB, "SEGREL32LSB", 2, FALSE, TRUE), |
| 143 | IA64_HOWTO (R_IA64_SEGREL64MSB, "SEGREL64MSB", 4, FALSE, TRUE), |
| 144 | IA64_HOWTO (R_IA64_SEGREL64LSB, "SEGREL64LSB", 4, FALSE, TRUE), |
| 145 | |
| 146 | IA64_HOWTO (R_IA64_SECREL32MSB, "SECREL32MSB", 2, FALSE, TRUE), |
| 147 | IA64_HOWTO (R_IA64_SECREL32LSB, "SECREL32LSB", 2, FALSE, TRUE), |
| 148 | IA64_HOWTO (R_IA64_SECREL64MSB, "SECREL64MSB", 4, FALSE, TRUE), |
| 149 | IA64_HOWTO (R_IA64_SECREL64LSB, "SECREL64LSB", 4, FALSE, TRUE), |
| 150 | |
| 151 | IA64_HOWTO (R_IA64_REL32MSB, "REL32MSB", 2, FALSE, TRUE), |
| 152 | IA64_HOWTO (R_IA64_REL32LSB, "REL32LSB", 2, FALSE, TRUE), |
| 153 | IA64_HOWTO (R_IA64_REL64MSB, "REL64MSB", 4, FALSE, TRUE), |
| 154 | IA64_HOWTO (R_IA64_REL64LSB, "REL64LSB", 4, FALSE, TRUE), |
| 155 | |
| 156 | IA64_HOWTO (R_IA64_LTV32MSB, "LTV32MSB", 2, FALSE, TRUE), |
| 157 | IA64_HOWTO (R_IA64_LTV32LSB, "LTV32LSB", 2, FALSE, TRUE), |
| 158 | IA64_HOWTO (R_IA64_LTV64MSB, "LTV64MSB", 4, FALSE, TRUE), |
| 159 | IA64_HOWTO (R_IA64_LTV64LSB, "LTV64LSB", 4, FALSE, TRUE), |
| 160 | |
| 161 | IA64_HOWTO (R_IA64_PCREL21BI, "PCREL21BI", 0, TRUE, TRUE), |
| 162 | IA64_HOWTO (R_IA64_PCREL22, "PCREL22", 0, TRUE, TRUE), |
| 163 | IA64_HOWTO (R_IA64_PCREL64I, "PCREL64I", 0, TRUE, TRUE), |
| 164 | |
| 165 | IA64_HOWTO (R_IA64_IPLTMSB, "IPLTMSB", 4, FALSE, TRUE), |
| 166 | IA64_HOWTO (R_IA64_IPLTLSB, "IPLTLSB", 4, FALSE, TRUE), |
| 167 | IA64_HOWTO (R_IA64_COPY, "COPY", 4, FALSE, TRUE), |
| 168 | IA64_HOWTO (R_IA64_LTOFF22X, "LTOFF22X", 0, FALSE, TRUE), |
| 169 | IA64_HOWTO (R_IA64_LDXMOV, "LDXMOV", 0, FALSE, TRUE), |
| 170 | |
| 171 | IA64_HOWTO (R_IA64_TPREL14, "TPREL14", 0, FALSE, FALSE), |
| 172 | IA64_HOWTO (R_IA64_TPREL22, "TPREL22", 0, FALSE, FALSE), |
| 173 | IA64_HOWTO (R_IA64_TPREL64I, "TPREL64I", 0, FALSE, FALSE), |
| 174 | IA64_HOWTO (R_IA64_TPREL64MSB, "TPREL64MSB", 4, FALSE, FALSE), |
| 175 | IA64_HOWTO (R_IA64_TPREL64LSB, "TPREL64LSB", 4, FALSE, FALSE), |
| 176 | IA64_HOWTO (R_IA64_LTOFF_TPREL22, "LTOFF_TPREL22", 0, FALSE, FALSE), |
| 177 | |
| 178 | IA64_HOWTO (R_IA64_DTPMOD64MSB, "DTPMOD64MSB", 4, FALSE, FALSE), |
| 179 | IA64_HOWTO (R_IA64_DTPMOD64LSB, "DTPMOD64LSB", 4, FALSE, FALSE), |
| 180 | IA64_HOWTO (R_IA64_LTOFF_DTPMOD22, "LTOFF_DTPMOD22", 0, FALSE, FALSE), |
| 181 | |
| 182 | IA64_HOWTO (R_IA64_DTPREL14, "DTPREL14", 0, FALSE, FALSE), |
| 183 | IA64_HOWTO (R_IA64_DTPREL22, "DTPREL22", 0, FALSE, FALSE), |
| 184 | IA64_HOWTO (R_IA64_DTPREL64I, "DTPREL64I", 0, FALSE, FALSE), |
| 185 | IA64_HOWTO (R_IA64_DTPREL32MSB, "DTPREL32MSB", 2, FALSE, FALSE), |
| 186 | IA64_HOWTO (R_IA64_DTPREL32LSB, "DTPREL32LSB", 2, FALSE, FALSE), |
| 187 | IA64_HOWTO (R_IA64_DTPREL64MSB, "DTPREL64MSB", 4, FALSE, FALSE), |
| 188 | IA64_HOWTO (R_IA64_DTPREL64LSB, "DTPREL64LSB", 4, FALSE, FALSE), |
| 189 | IA64_HOWTO (R_IA64_LTOFF_DTPREL22, "LTOFF_DTPREL22", 0, FALSE, FALSE), |
| 190 | }; |
| 191 | |
| 192 | static unsigned char elf_code_to_howto_index[R_IA64_MAX_RELOC_CODE + 1]; |
| 193 | |
| 194 | /* Given a BFD reloc type, return the matching HOWTO structure. */ |
| 195 | |
| 196 | reloc_howto_type * |
| 197 | ia64_elf_lookup_howto (unsigned int rtype) |
| 198 | { |
| 199 | static int inited = 0; |
| 200 | int i; |
| 201 | |
| 202 | if (!inited) |
| 203 | { |
| 204 | inited = 1; |
| 205 | |
| 206 | memset (elf_code_to_howto_index, 0xff, sizeof (elf_code_to_howto_index)); |
| 207 | for (i = 0; i < NELEMS (ia64_howto_table); ++i) |
| 208 | elf_code_to_howto_index[ia64_howto_table[i].type] = i; |
| 209 | } |
| 210 | |
| 211 | if (rtype > R_IA64_MAX_RELOC_CODE) |
| 212 | return 0; |
| 213 | i = elf_code_to_howto_index[rtype]; |
| 214 | if (i >= NELEMS (ia64_howto_table)) |
| 215 | return 0; |
| 216 | return ia64_howto_table + i; |
| 217 | } |
| 218 | |
| 219 | reloc_howto_type* |
| 220 | ia64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 221 | bfd_reloc_code_real_type bfd_code) |
| 222 | { |
| 223 | unsigned int rtype; |
| 224 | |
| 225 | switch (bfd_code) |
| 226 | { |
| 227 | case BFD_RELOC_NONE: rtype = R_IA64_NONE; break; |
| 228 | |
| 229 | case BFD_RELOC_IA64_IMM14: rtype = R_IA64_IMM14; break; |
| 230 | case BFD_RELOC_IA64_IMM22: rtype = R_IA64_IMM22; break; |
| 231 | case BFD_RELOC_IA64_IMM64: rtype = R_IA64_IMM64; break; |
| 232 | |
| 233 | case BFD_RELOC_IA64_DIR32MSB: rtype = R_IA64_DIR32MSB; break; |
| 234 | case BFD_RELOC_IA64_DIR32LSB: rtype = R_IA64_DIR32LSB; break; |
| 235 | case BFD_RELOC_IA64_DIR64MSB: rtype = R_IA64_DIR64MSB; break; |
| 236 | case BFD_RELOC_IA64_DIR64LSB: rtype = R_IA64_DIR64LSB; break; |
| 237 | |
| 238 | case BFD_RELOC_IA64_GPREL22: rtype = R_IA64_GPREL22; break; |
| 239 | case BFD_RELOC_IA64_GPREL64I: rtype = R_IA64_GPREL64I; break; |
| 240 | case BFD_RELOC_IA64_GPREL32MSB: rtype = R_IA64_GPREL32MSB; break; |
| 241 | case BFD_RELOC_IA64_GPREL32LSB: rtype = R_IA64_GPREL32LSB; break; |
| 242 | case BFD_RELOC_IA64_GPREL64MSB: rtype = R_IA64_GPREL64MSB; break; |
| 243 | case BFD_RELOC_IA64_GPREL64LSB: rtype = R_IA64_GPREL64LSB; break; |
| 244 | |
| 245 | case BFD_RELOC_IA64_LTOFF22: rtype = R_IA64_LTOFF22; break; |
| 246 | case BFD_RELOC_IA64_LTOFF64I: rtype = R_IA64_LTOFF64I; break; |
| 247 | |
| 248 | case BFD_RELOC_IA64_PLTOFF22: rtype = R_IA64_PLTOFF22; break; |
| 249 | case BFD_RELOC_IA64_PLTOFF64I: rtype = R_IA64_PLTOFF64I; break; |
| 250 | case BFD_RELOC_IA64_PLTOFF64MSB: rtype = R_IA64_PLTOFF64MSB; break; |
| 251 | case BFD_RELOC_IA64_PLTOFF64LSB: rtype = R_IA64_PLTOFF64LSB; break; |
| 252 | case BFD_RELOC_IA64_FPTR64I: rtype = R_IA64_FPTR64I; break; |
| 253 | case BFD_RELOC_IA64_FPTR32MSB: rtype = R_IA64_FPTR32MSB; break; |
| 254 | case BFD_RELOC_IA64_FPTR32LSB: rtype = R_IA64_FPTR32LSB; break; |
| 255 | case BFD_RELOC_IA64_FPTR64MSB: rtype = R_IA64_FPTR64MSB; break; |
| 256 | case BFD_RELOC_IA64_FPTR64LSB: rtype = R_IA64_FPTR64LSB; break; |
| 257 | |
| 258 | case BFD_RELOC_IA64_PCREL21B: rtype = R_IA64_PCREL21B; break; |
| 259 | case BFD_RELOC_IA64_PCREL21BI: rtype = R_IA64_PCREL21BI; break; |
| 260 | case BFD_RELOC_IA64_PCREL21M: rtype = R_IA64_PCREL21M; break; |
| 261 | case BFD_RELOC_IA64_PCREL21F: rtype = R_IA64_PCREL21F; break; |
| 262 | case BFD_RELOC_IA64_PCREL22: rtype = R_IA64_PCREL22; break; |
| 263 | case BFD_RELOC_IA64_PCREL60B: rtype = R_IA64_PCREL60B; break; |
| 264 | case BFD_RELOC_IA64_PCREL64I: rtype = R_IA64_PCREL64I; break; |
| 265 | case BFD_RELOC_IA64_PCREL32MSB: rtype = R_IA64_PCREL32MSB; break; |
| 266 | case BFD_RELOC_IA64_PCREL32LSB: rtype = R_IA64_PCREL32LSB; break; |
| 267 | case BFD_RELOC_IA64_PCREL64MSB: rtype = R_IA64_PCREL64MSB; break; |
| 268 | case BFD_RELOC_IA64_PCREL64LSB: rtype = R_IA64_PCREL64LSB; break; |
| 269 | |
| 270 | case BFD_RELOC_IA64_LTOFF_FPTR22: rtype = R_IA64_LTOFF_FPTR22; break; |
| 271 | case BFD_RELOC_IA64_LTOFF_FPTR64I: rtype = R_IA64_LTOFF_FPTR64I; break; |
| 272 | case BFD_RELOC_IA64_LTOFF_FPTR32MSB: rtype = R_IA64_LTOFF_FPTR32MSB; break; |
| 273 | case BFD_RELOC_IA64_LTOFF_FPTR32LSB: rtype = R_IA64_LTOFF_FPTR32LSB; break; |
| 274 | case BFD_RELOC_IA64_LTOFF_FPTR64MSB: rtype = R_IA64_LTOFF_FPTR64MSB; break; |
| 275 | case BFD_RELOC_IA64_LTOFF_FPTR64LSB: rtype = R_IA64_LTOFF_FPTR64LSB; break; |
| 276 | |
| 277 | case BFD_RELOC_IA64_SEGREL32MSB: rtype = R_IA64_SEGREL32MSB; break; |
| 278 | case BFD_RELOC_IA64_SEGREL32LSB: rtype = R_IA64_SEGREL32LSB; break; |
| 279 | case BFD_RELOC_IA64_SEGREL64MSB: rtype = R_IA64_SEGREL64MSB; break; |
| 280 | case BFD_RELOC_IA64_SEGREL64LSB: rtype = R_IA64_SEGREL64LSB; break; |
| 281 | |
| 282 | case BFD_RELOC_IA64_SECREL32MSB: rtype = R_IA64_SECREL32MSB; break; |
| 283 | case BFD_RELOC_IA64_SECREL32LSB: rtype = R_IA64_SECREL32LSB; break; |
| 284 | case BFD_RELOC_IA64_SECREL64MSB: rtype = R_IA64_SECREL64MSB; break; |
| 285 | case BFD_RELOC_IA64_SECREL64LSB: rtype = R_IA64_SECREL64LSB; break; |
| 286 | |
| 287 | case BFD_RELOC_IA64_REL32MSB: rtype = R_IA64_REL32MSB; break; |
| 288 | case BFD_RELOC_IA64_REL32LSB: rtype = R_IA64_REL32LSB; break; |
| 289 | case BFD_RELOC_IA64_REL64MSB: rtype = R_IA64_REL64MSB; break; |
| 290 | case BFD_RELOC_IA64_REL64LSB: rtype = R_IA64_REL64LSB; break; |
| 291 | |
| 292 | case BFD_RELOC_IA64_LTV32MSB: rtype = R_IA64_LTV32MSB; break; |
| 293 | case BFD_RELOC_IA64_LTV32LSB: rtype = R_IA64_LTV32LSB; break; |
| 294 | case BFD_RELOC_IA64_LTV64MSB: rtype = R_IA64_LTV64MSB; break; |
| 295 | case BFD_RELOC_IA64_LTV64LSB: rtype = R_IA64_LTV64LSB; break; |
| 296 | |
| 297 | case BFD_RELOC_IA64_IPLTMSB: rtype = R_IA64_IPLTMSB; break; |
| 298 | case BFD_RELOC_IA64_IPLTLSB: rtype = R_IA64_IPLTLSB; break; |
| 299 | case BFD_RELOC_IA64_COPY: rtype = R_IA64_COPY; break; |
| 300 | case BFD_RELOC_IA64_LTOFF22X: rtype = R_IA64_LTOFF22X; break; |
| 301 | case BFD_RELOC_IA64_LDXMOV: rtype = R_IA64_LDXMOV; break; |
| 302 | |
| 303 | case BFD_RELOC_IA64_TPREL14: rtype = R_IA64_TPREL14; break; |
| 304 | case BFD_RELOC_IA64_TPREL22: rtype = R_IA64_TPREL22; break; |
| 305 | case BFD_RELOC_IA64_TPREL64I: rtype = R_IA64_TPREL64I; break; |
| 306 | case BFD_RELOC_IA64_TPREL64MSB: rtype = R_IA64_TPREL64MSB; break; |
| 307 | case BFD_RELOC_IA64_TPREL64LSB: rtype = R_IA64_TPREL64LSB; break; |
| 308 | case BFD_RELOC_IA64_LTOFF_TPREL22: rtype = R_IA64_LTOFF_TPREL22; break; |
| 309 | |
| 310 | case BFD_RELOC_IA64_DTPMOD64MSB: rtype = R_IA64_DTPMOD64MSB; break; |
| 311 | case BFD_RELOC_IA64_DTPMOD64LSB: rtype = R_IA64_DTPMOD64LSB; break; |
| 312 | case BFD_RELOC_IA64_LTOFF_DTPMOD22: rtype = R_IA64_LTOFF_DTPMOD22; break; |
| 313 | |
| 314 | case BFD_RELOC_IA64_DTPREL14: rtype = R_IA64_DTPREL14; break; |
| 315 | case BFD_RELOC_IA64_DTPREL22: rtype = R_IA64_DTPREL22; break; |
| 316 | case BFD_RELOC_IA64_DTPREL64I: rtype = R_IA64_DTPREL64I; break; |
| 317 | case BFD_RELOC_IA64_DTPREL32MSB: rtype = R_IA64_DTPREL32MSB; break; |
| 318 | case BFD_RELOC_IA64_DTPREL32LSB: rtype = R_IA64_DTPREL32LSB; break; |
| 319 | case BFD_RELOC_IA64_DTPREL64MSB: rtype = R_IA64_DTPREL64MSB; break; |
| 320 | case BFD_RELOC_IA64_DTPREL64LSB: rtype = R_IA64_DTPREL64LSB; break; |
| 321 | case BFD_RELOC_IA64_LTOFF_DTPREL22: rtype = R_IA64_LTOFF_DTPREL22; break; |
| 322 | |
| 323 | default: return 0; |
| 324 | } |
| 325 | return ia64_elf_lookup_howto (rtype); |
| 326 | } |
| 327 | |
| 328 | reloc_howto_type * |
| 329 | ia64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 330 | const char *r_name) |
| 331 | { |
| 332 | unsigned int i; |
| 333 | |
| 334 | for (i = 0; |
| 335 | i < sizeof (ia64_howto_table) / sizeof (ia64_howto_table[0]); |
| 336 | i++) |
| 337 | if (ia64_howto_table[i].name != NULL |
| 338 | && strcasecmp (ia64_howto_table[i].name, r_name) == 0) |
| 339 | return &ia64_howto_table[i]; |
| 340 | |
| 341 | return NULL; |
| 342 | } |
| 343 | |
| 344 | #define BTYPE_SHIFT 6 |
| 345 | #define Y_SHIFT 26 |
| 346 | #define X6_SHIFT 27 |
| 347 | #define X4_SHIFT 27 |
| 348 | #define X3_SHIFT 33 |
| 349 | #define X2_SHIFT 31 |
| 350 | #define X_SHIFT 33 |
| 351 | #define OPCODE_SHIFT 37 |
| 352 | |
| 353 | #define OPCODE_BITS (0xfLL << OPCODE_SHIFT) |
| 354 | #define X6_BITS (0x3fLL << X6_SHIFT) |
| 355 | #define X4_BITS (0xfLL << X4_SHIFT) |
| 356 | #define X3_BITS (0x7LL << X3_SHIFT) |
| 357 | #define X2_BITS (0x3LL << X2_SHIFT) |
| 358 | #define X_BITS (0x1LL << X_SHIFT) |
| 359 | #define Y_BITS (0x1LL << Y_SHIFT) |
| 360 | #define BTYPE_BITS (0x7LL << BTYPE_SHIFT) |
| 361 | #define PREDICATE_BITS (0x3fLL) |
| 362 | |
| 363 | #define IS_NOP_B(i) \ |
| 364 | (((i) & (OPCODE_BITS | X6_BITS)) == (2LL << OPCODE_SHIFT)) |
| 365 | #define IS_NOP_F(i) \ |
| 366 | (((i) & (OPCODE_BITS | X_BITS | X6_BITS | Y_BITS)) \ |
| 367 | == (0x1LL << X6_SHIFT)) |
| 368 | #define IS_NOP_I(i) \ |
| 369 | (((i) & (OPCODE_BITS | X3_BITS | X6_BITS | Y_BITS)) \ |
| 370 | == (0x1LL << X6_SHIFT)) |
| 371 | #define IS_NOP_M(i) \ |
| 372 | (((i) & (OPCODE_BITS | X3_BITS | X2_BITS | X4_BITS | Y_BITS)) \ |
| 373 | == (0x1LL << X4_SHIFT)) |
| 374 | #define IS_BR_COND(i) \ |
| 375 | (((i) & (OPCODE_BITS | BTYPE_BITS)) == (0x4LL << OPCODE_SHIFT)) |
| 376 | #define IS_BR_CALL(i) \ |
| 377 | (((i) & OPCODE_BITS) == (0x5LL << OPCODE_SHIFT)) |
| 378 | |
| 379 | bfd_boolean |
| 380 | ia64_elf_relax_br (bfd_byte *contents, bfd_vma off) |
| 381 | { |
| 382 | unsigned int template_val, mlx; |
| 383 | bfd_vma t0, t1, s0, s1, s2, br_code; |
| 384 | long br_slot; |
| 385 | bfd_byte *hit_addr; |
| 386 | |
| 387 | hit_addr = (bfd_byte *) (contents + off); |
| 388 | br_slot = (intptr_t) hit_addr & 0x3; |
| 389 | hit_addr -= br_slot; |
| 390 | t0 = bfd_getl64 (hit_addr + 0); |
| 391 | t1 = bfd_getl64 (hit_addr + 8); |
| 392 | |
| 393 | /* Check if we can turn br into brl. A label is always at the start |
| 394 | of the bundle. Even if there are predicates on NOPs, we still |
| 395 | perform this optimization. */ |
| 396 | template_val = t0 & 0x1e; |
| 397 | s0 = (t0 >> 5) & 0x1ffffffffffLL; |
| 398 | s1 = ((t0 >> 46) | (t1 << 18)) & 0x1ffffffffffLL; |
| 399 | s2 = (t1 >> 23) & 0x1ffffffffffLL; |
| 400 | switch (br_slot) |
| 401 | { |
| 402 | case 0: |
| 403 | /* Check if slot 1 and slot 2 are NOPs. Possible template is |
| 404 | BBB. We only need to check nop.b. */ |
| 405 | if (!(IS_NOP_B (s1) && IS_NOP_B (s2))) |
| 406 | return FALSE; |
| 407 | br_code = s0; |
| 408 | break; |
| 409 | case 1: |
| 410 | /* Check if slot 2 is NOP. Possible templates are MBB and BBB. |
| 411 | For BBB, slot 0 also has to be nop.b. */ |
| 412 | if (!((template_val == 0x12 /* MBB */ |
| 413 | && IS_NOP_B (s2)) |
| 414 | || (template_val == 0x16 /* BBB */ |
| 415 | && IS_NOP_B (s0) |
| 416 | && IS_NOP_B (s2)))) |
| 417 | return FALSE; |
| 418 | br_code = s1; |
| 419 | break; |
| 420 | case 2: |
| 421 | /* Check if slot 1 is NOP. Possible templates are MIB, MBB, BBB, |
| 422 | MMB and MFB. For BBB, slot 0 also has to be nop.b. */ |
| 423 | if (!((template_val == 0x10 /* MIB */ |
| 424 | && IS_NOP_I (s1)) |
| 425 | || (template_val == 0x12 /* MBB */ |
| 426 | && IS_NOP_B (s1)) |
| 427 | || (template_val == 0x16 /* BBB */ |
| 428 | && IS_NOP_B (s0) |
| 429 | && IS_NOP_B (s1)) |
| 430 | || (template_val == 0x18 /* MMB */ |
| 431 | && IS_NOP_M (s1)) |
| 432 | || (template_val == 0x1c /* MFB */ |
| 433 | && IS_NOP_F (s1)))) |
| 434 | return FALSE; |
| 435 | br_code = s2; |
| 436 | break; |
| 437 | default: |
| 438 | /* It should never happen. */ |
| 439 | abort (); |
| 440 | } |
| 441 | |
| 442 | /* We can turn br.cond/br.call into brl.cond/brl.call. */ |
| 443 | if (!(IS_BR_COND (br_code) || IS_BR_CALL (br_code))) |
| 444 | return FALSE; |
| 445 | |
| 446 | /* Turn br into brl by setting bit 40. */ |
| 447 | br_code |= 0x1LL << 40; |
| 448 | |
| 449 | /* Turn the old bundle into a MLX bundle with the same stop-bit |
| 450 | variety. */ |
| 451 | if (t0 & 0x1) |
| 452 | mlx = 0x5; |
| 453 | else |
| 454 | mlx = 0x4; |
| 455 | |
| 456 | if (template_val == 0x16) |
| 457 | { |
| 458 | /* For BBB, we need to put nop.m in slot 0. We keep the original |
| 459 | predicate only if slot 0 isn't br. */ |
| 460 | if (br_slot == 0) |
| 461 | t0 = 0LL; |
| 462 | else |
| 463 | t0 &= PREDICATE_BITS << 5; |
| 464 | t0 |= 0x1LL << (X4_SHIFT + 5); |
| 465 | } |
| 466 | else |
| 467 | { |
| 468 | /* Keep the original instruction in slot 0. */ |
| 469 | t0 &= 0x1ffffffffffLL << 5; |
| 470 | } |
| 471 | |
| 472 | t0 |= mlx; |
| 473 | |
| 474 | /* Put brl in slot 1. */ |
| 475 | t1 = br_code << 23; |
| 476 | |
| 477 | bfd_putl64 (t0, hit_addr); |
| 478 | bfd_putl64 (t1, hit_addr + 8); |
| 479 | return TRUE; |
| 480 | } |
| 481 | |
| 482 | void |
| 483 | ia64_elf_relax_brl (bfd_byte *contents, bfd_vma off) |
| 484 | { |
| 485 | int template_val; |
| 486 | bfd_byte *hit_addr; |
| 487 | bfd_vma t0, t1, i0, i1, i2; |
| 488 | |
| 489 | hit_addr = (bfd_byte *) (contents + off); |
| 490 | hit_addr -= (intptr_t) hit_addr & 0x3; |
| 491 | t0 = bfd_getl64 (hit_addr); |
| 492 | t1 = bfd_getl64 (hit_addr + 8); |
| 493 | |
| 494 | /* Keep the instruction in slot 0. */ |
| 495 | i0 = (t0 >> 5) & 0x1ffffffffffLL; |
| 496 | /* Use nop.b for slot 1. */ |
| 497 | i1 = 0x4000000000LL; |
| 498 | /* For slot 2, turn brl into br by masking out bit 40. */ |
| 499 | i2 = (t1 >> 23) & 0x0ffffffffffLL; |
| 500 | |
| 501 | /* Turn a MLX bundle into a MBB bundle with the same stop-bit |
| 502 | variety. */ |
| 503 | if (t0 & 0x1) |
| 504 | template_val = 0x13; |
| 505 | else |
| 506 | template_val = 0x12; |
| 507 | t0 = (i1 << 46) | (i0 << 5) | template_val; |
| 508 | t1 = (i2 << 23) | (i1 >> 18); |
| 509 | |
| 510 | bfd_putl64 (t0, hit_addr); |
| 511 | bfd_putl64 (t1, hit_addr + 8); |
| 512 | } |
| 513 | |
| 514 | void |
| 515 | ia64_elf_relax_ldxmov (bfd_byte *contents, bfd_vma off) |
| 516 | { |
| 517 | int shift, r1, r3; |
| 518 | bfd_vma dword, insn; |
| 519 | |
| 520 | switch ((int)off & 0x3) |
| 521 | { |
| 522 | case 0: shift = 5; break; |
| 523 | case 1: shift = 14; off += 3; break; |
| 524 | case 2: shift = 23; off += 6; break; |
| 525 | default: |
| 526 | abort (); |
| 527 | } |
| 528 | |
| 529 | dword = bfd_getl64 (contents + off); |
| 530 | insn = (dword >> shift) & 0x1ffffffffffLL; |
| 531 | |
| 532 | r1 = (insn >> 6) & 127; |
| 533 | r3 = (insn >> 20) & 127; |
| 534 | if (r1 == r3) |
| 535 | insn = 0x8000000; /* nop */ |
| 536 | else |
| 537 | insn = (insn & 0x7f01fff) | 0x10800000000LL; /* (qp) mov r1 = r3 */ |
| 538 | |
| 539 | dword &= ~(0x1ffffffffffLL << shift); |
| 540 | dword |= (insn << shift); |
| 541 | bfd_putl64 (dword, contents + off); |
| 542 | } |
| 543 | \f |
| 544 | bfd_reloc_status_type |
| 545 | ia64_elf_install_value (bfd_byte *hit_addr, bfd_vma v, unsigned int r_type) |
| 546 | { |
| 547 | const struct ia64_operand *op; |
| 548 | int bigendian = 0, shift = 0; |
| 549 | bfd_vma t0, t1, dword; |
| 550 | ia64_insn insn; |
| 551 | enum ia64_opnd opnd; |
| 552 | const char *err; |
| 553 | size_t size = 8; |
| 554 | #ifdef BFD_HOST_U_64_BIT |
| 555 | BFD_HOST_U_64_BIT val = (BFD_HOST_U_64_BIT) v; |
| 556 | #else |
| 557 | bfd_vma val = v; |
| 558 | #endif |
| 559 | |
| 560 | opnd = IA64_OPND_NIL; |
| 561 | switch (r_type) |
| 562 | { |
| 563 | case R_IA64_NONE: |
| 564 | case R_IA64_LDXMOV: |
| 565 | return bfd_reloc_ok; |
| 566 | |
| 567 | /* Instruction relocations. */ |
| 568 | |
| 569 | case R_IA64_IMM14: |
| 570 | case R_IA64_TPREL14: |
| 571 | case R_IA64_DTPREL14: |
| 572 | opnd = IA64_OPND_IMM14; |
| 573 | break; |
| 574 | |
| 575 | case R_IA64_PCREL21F: opnd = IA64_OPND_TGT25; break; |
| 576 | case R_IA64_PCREL21M: opnd = IA64_OPND_TGT25b; break; |
| 577 | case R_IA64_PCREL60B: opnd = IA64_OPND_TGT64; break; |
| 578 | case R_IA64_PCREL21B: |
| 579 | case R_IA64_PCREL21BI: |
| 580 | opnd = IA64_OPND_TGT25c; |
| 581 | break; |
| 582 | |
| 583 | case R_IA64_IMM22: |
| 584 | case R_IA64_GPREL22: |
| 585 | case R_IA64_LTOFF22: |
| 586 | case R_IA64_LTOFF22X: |
| 587 | case R_IA64_PLTOFF22: |
| 588 | case R_IA64_PCREL22: |
| 589 | case R_IA64_LTOFF_FPTR22: |
| 590 | case R_IA64_TPREL22: |
| 591 | case R_IA64_DTPREL22: |
| 592 | case R_IA64_LTOFF_TPREL22: |
| 593 | case R_IA64_LTOFF_DTPMOD22: |
| 594 | case R_IA64_LTOFF_DTPREL22: |
| 595 | opnd = IA64_OPND_IMM22; |
| 596 | break; |
| 597 | |
| 598 | case R_IA64_IMM64: |
| 599 | case R_IA64_GPREL64I: |
| 600 | case R_IA64_LTOFF64I: |
| 601 | case R_IA64_PLTOFF64I: |
| 602 | case R_IA64_PCREL64I: |
| 603 | case R_IA64_FPTR64I: |
| 604 | case R_IA64_LTOFF_FPTR64I: |
| 605 | case R_IA64_TPREL64I: |
| 606 | case R_IA64_DTPREL64I: |
| 607 | opnd = IA64_OPND_IMMU64; |
| 608 | break; |
| 609 | |
| 610 | /* Data relocations. */ |
| 611 | |
| 612 | case R_IA64_DIR32MSB: |
| 613 | case R_IA64_GPREL32MSB: |
| 614 | case R_IA64_FPTR32MSB: |
| 615 | case R_IA64_PCREL32MSB: |
| 616 | case R_IA64_LTOFF_FPTR32MSB: |
| 617 | case R_IA64_SEGREL32MSB: |
| 618 | case R_IA64_SECREL32MSB: |
| 619 | case R_IA64_LTV32MSB: |
| 620 | case R_IA64_DTPREL32MSB: |
| 621 | size = 4; bigendian = 1; |
| 622 | break; |
| 623 | |
| 624 | case R_IA64_DIR32LSB: |
| 625 | case R_IA64_GPREL32LSB: |
| 626 | case R_IA64_FPTR32LSB: |
| 627 | case R_IA64_PCREL32LSB: |
| 628 | case R_IA64_LTOFF_FPTR32LSB: |
| 629 | case R_IA64_SEGREL32LSB: |
| 630 | case R_IA64_SECREL32LSB: |
| 631 | case R_IA64_LTV32LSB: |
| 632 | case R_IA64_DTPREL32LSB: |
| 633 | size = 4; bigendian = 0; |
| 634 | break; |
| 635 | |
| 636 | case R_IA64_DIR64MSB: |
| 637 | case R_IA64_GPREL64MSB: |
| 638 | case R_IA64_PLTOFF64MSB: |
| 639 | case R_IA64_FPTR64MSB: |
| 640 | case R_IA64_PCREL64MSB: |
| 641 | case R_IA64_LTOFF_FPTR64MSB: |
| 642 | case R_IA64_SEGREL64MSB: |
| 643 | case R_IA64_SECREL64MSB: |
| 644 | case R_IA64_LTV64MSB: |
| 645 | case R_IA64_TPREL64MSB: |
| 646 | case R_IA64_DTPMOD64MSB: |
| 647 | case R_IA64_DTPREL64MSB: |
| 648 | size = 8; bigendian = 1; |
| 649 | break; |
| 650 | |
| 651 | case R_IA64_DIR64LSB: |
| 652 | case R_IA64_GPREL64LSB: |
| 653 | case R_IA64_PLTOFF64LSB: |
| 654 | case R_IA64_FPTR64LSB: |
| 655 | case R_IA64_PCREL64LSB: |
| 656 | case R_IA64_LTOFF_FPTR64LSB: |
| 657 | case R_IA64_SEGREL64LSB: |
| 658 | case R_IA64_SECREL64LSB: |
| 659 | case R_IA64_LTV64LSB: |
| 660 | case R_IA64_TPREL64LSB: |
| 661 | case R_IA64_DTPMOD64LSB: |
| 662 | case R_IA64_DTPREL64LSB: |
| 663 | size = 8; bigendian = 0; |
| 664 | break; |
| 665 | |
| 666 | /* Unsupported / Dynamic relocations. */ |
| 667 | default: |
| 668 | return bfd_reloc_notsupported; |
| 669 | } |
| 670 | |
| 671 | switch (opnd) |
| 672 | { |
| 673 | case IA64_OPND_IMMU64: |
| 674 | hit_addr -= (intptr_t) hit_addr & 0x3; |
| 675 | t0 = bfd_getl64 (hit_addr); |
| 676 | t1 = bfd_getl64 (hit_addr + 8); |
| 677 | |
| 678 | /* tmpl/s: bits 0.. 5 in t0 |
| 679 | slot 0: bits 5..45 in t0 |
| 680 | slot 1: bits 46..63 in t0, bits 0..22 in t1 |
| 681 | slot 2: bits 23..63 in t1 */ |
| 682 | |
| 683 | /* First, clear the bits that form the 64 bit constant. */ |
| 684 | t0 &= ~(0x3ffffLL << 46); |
| 685 | t1 &= ~(0x7fffffLL |
| 686 | | (( (0x07fLL << 13) | (0x1ffLL << 27) |
| 687 | | (0x01fLL << 22) | (0x001LL << 21) |
| 688 | | (0x001LL << 36)) << 23)); |
| 689 | |
| 690 | t0 |= ((val >> 22) & 0x03ffffLL) << 46; /* 18 lsbs of imm41 */ |
| 691 | t1 |= ((val >> 40) & 0x7fffffLL) << 0; /* 23 msbs of imm41 */ |
| 692 | t1 |= ( (((val >> 0) & 0x07f) << 13) /* imm7b */ |
| 693 | | (((val >> 7) & 0x1ff) << 27) /* imm9d */ |
| 694 | | (((val >> 16) & 0x01f) << 22) /* imm5c */ |
| 695 | | (((val >> 21) & 0x001) << 21) /* ic */ |
| 696 | | (((val >> 63) & 0x001) << 36)) << 23; /* i */ |
| 697 | |
| 698 | bfd_putl64 (t0, hit_addr); |
| 699 | bfd_putl64 (t1, hit_addr + 8); |
| 700 | break; |
| 701 | |
| 702 | case IA64_OPND_TGT64: |
| 703 | hit_addr -= (intptr_t) hit_addr & 0x3; |
| 704 | t0 = bfd_getl64 (hit_addr); |
| 705 | t1 = bfd_getl64 (hit_addr + 8); |
| 706 | |
| 707 | /* tmpl/s: bits 0.. 5 in t0 |
| 708 | slot 0: bits 5..45 in t0 |
| 709 | slot 1: bits 46..63 in t0, bits 0..22 in t1 |
| 710 | slot 2: bits 23..63 in t1 */ |
| 711 | |
| 712 | /* First, clear the bits that form the 64 bit constant. */ |
| 713 | t0 &= ~(0x3ffffLL << 46); |
| 714 | t1 &= ~(0x7fffffLL |
| 715 | | ((1LL << 36 | 0xfffffLL << 13) << 23)); |
| 716 | |
| 717 | val >>= 4; |
| 718 | t0 |= ((val >> 20) & 0xffffLL) << 2 << 46; /* 16 lsbs of imm39 */ |
| 719 | t1 |= ((val >> 36) & 0x7fffffLL) << 0; /* 23 msbs of imm39 */ |
| 720 | t1 |= ((((val >> 0) & 0xfffffLL) << 13) /* imm20b */ |
| 721 | | (((val >> 59) & 0x1LL) << 36)) << 23; /* i */ |
| 722 | |
| 723 | bfd_putl64 (t0, hit_addr); |
| 724 | bfd_putl64 (t1, hit_addr + 8); |
| 725 | break; |
| 726 | |
| 727 | default: |
| 728 | switch ((intptr_t) hit_addr & 0x3) |
| 729 | { |
| 730 | case 0: shift = 5; break; |
| 731 | case 1: shift = 14; hit_addr += 3; break; |
| 732 | case 2: shift = 23; hit_addr += 6; break; |
| 733 | case 3: return bfd_reloc_notsupported; /* shouldn't happen... */ |
| 734 | } |
| 735 | dword = bfd_getl64 (hit_addr); |
| 736 | insn = (dword >> shift) & 0x1ffffffffffLL; |
| 737 | |
| 738 | op = elf64_ia64_operands + opnd; |
| 739 | err = (*op->insert) (op, val, &insn); |
| 740 | if (err) |
| 741 | return bfd_reloc_overflow; |
| 742 | |
| 743 | dword &= ~(0x1ffffffffffLL << shift); |
| 744 | dword |= (insn << shift); |
| 745 | bfd_putl64 (dword, hit_addr); |
| 746 | break; |
| 747 | |
| 748 | case IA64_OPND_NIL: |
| 749 | /* A data relocation. */ |
| 750 | if (bigendian) |
| 751 | if (size == 4) |
| 752 | bfd_putb32 (val, hit_addr); |
| 753 | else |
| 754 | bfd_putb64 (val, hit_addr); |
| 755 | else |
| 756 | if (size == 4) |
| 757 | bfd_putl32 (val, hit_addr); |
| 758 | else |
| 759 | bfd_putl64 (val, hit_addr); |
| 760 | break; |
| 761 | } |
| 762 | |
| 763 | return bfd_reloc_ok; |
| 764 | } |