| 1 |
14 |
khays |
/* BFD back-end for National Semiconductor's CRX ELF
|
| 2 |
|
|
Copyright 2004, 2005, 2006, 2007, 2009, 2010
|
| 3 |
|
|
Free Software Foundation, Inc.
|
| 4 |
|
|
Written by Tomer Levi, NSC, Israel.
|
| 5 |
|
|
|
| 6 |
|
|
This file is part of BFD, the Binary File Descriptor library.
|
| 7 |
|
|
|
| 8 |
|
|
This program is free software; you can redistribute it and/or modify
|
| 9 |
|
|
it under the terms of the GNU General Public License as published by
|
| 10 |
|
|
the Free Software Foundation; either version 3 of the License, or
|
| 11 |
|
|
(at your option) any later version.
|
| 12 |
|
|
|
| 13 |
|
|
This program is distributed in the hope that it will be useful,
|
| 14 |
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
| 15 |
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
| 16 |
|
|
GNU General Public License for more details.
|
| 17 |
|
|
|
| 18 |
|
|
You should have received a copy of the GNU General Public License
|
| 19 |
|
|
along with this program; if not, write to the Free Software
|
| 20 |
|
|
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
|
| 21 |
|
|
MA 02110-1301, USA. */
|
| 22 |
|
|
|
| 23 |
|
|
#include "sysdep.h"
|
| 24 |
|
|
#include "bfd.h"
|
| 25 |
|
|
#include "bfdlink.h"
|
| 26 |
|
|
#include "libbfd.h"
|
| 27 |
|
|
#include "elf-bfd.h"
|
| 28 |
|
|
#include "elf/crx.h"
|
| 29 |
|
|
|
| 30 |
|
|
static reloc_howto_type *elf_crx_reloc_type_lookup
|
| 31 |
|
|
(bfd *, bfd_reloc_code_real_type);
|
| 32 |
|
|
static void elf_crx_info_to_howto
|
| 33 |
|
|
(bfd *, arelent *, Elf_Internal_Rela *);
|
| 34 |
|
|
static bfd_boolean elf32_crx_relax_delete_bytes
|
| 35 |
|
|
(struct bfd_link_info *, bfd *, asection *, bfd_vma, int);
|
| 36 |
|
|
static bfd_reloc_status_type crx_elf_final_link_relocate
|
| 37 |
|
|
(reloc_howto_type *, bfd *, bfd *, asection *,
|
| 38 |
|
|
bfd_byte *, bfd_vma, bfd_vma, bfd_vma,
|
| 39 |
|
|
struct bfd_link_info *, asection *, int);
|
| 40 |
|
|
static bfd_boolean elf32_crx_relocate_section
|
| 41 |
|
|
(bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
|
| 42 |
|
|
Elf_Internal_Rela *, Elf_Internal_Sym *, asection **);
|
| 43 |
|
|
static bfd_boolean elf32_crx_relax_section
|
| 44 |
|
|
(bfd *, asection *, struct bfd_link_info *, bfd_boolean *);
|
| 45 |
|
|
static bfd_byte * elf32_crx_get_relocated_section_contents
|
| 46 |
|
|
(bfd *, struct bfd_link_info *, struct bfd_link_order *,
|
| 47 |
|
|
bfd_byte *, bfd_boolean, asymbol **);
|
| 48 |
|
|
|
| 49 |
|
|
/* crx_reloc_map array maps BFD relocation enum into a CRGAS relocation type. */
|
| 50 |
|
|
|
| 51 |
|
|
struct crx_reloc_map
|
| 52 |
|
|
{
|
| 53 |
|
|
bfd_reloc_code_real_type bfd_reloc_enum; /* BFD relocation enum. */
|
| 54 |
|
|
unsigned short crx_reloc_type; /* CRX relocation type. */
|
| 55 |
|
|
};
|
| 56 |
|
|
|
| 57 |
|
|
static const struct crx_reloc_map crx_reloc_map[R_CRX_MAX] =
|
| 58 |
|
|
{
|
| 59 |
|
|
{BFD_RELOC_NONE, R_CRX_NONE},
|
| 60 |
|
|
{BFD_RELOC_CRX_REL4, R_CRX_REL4},
|
| 61 |
|
|
{BFD_RELOC_CRX_REL8, R_CRX_REL8},
|
| 62 |
|
|
{BFD_RELOC_CRX_REL8_CMP, R_CRX_REL8_CMP},
|
| 63 |
|
|
{BFD_RELOC_CRX_REL16, R_CRX_REL16},
|
| 64 |
|
|
{BFD_RELOC_CRX_REL24, R_CRX_REL24},
|
| 65 |
|
|
{BFD_RELOC_CRX_REL32, R_CRX_REL32},
|
| 66 |
|
|
{BFD_RELOC_CRX_REGREL12, R_CRX_REGREL12},
|
| 67 |
|
|
{BFD_RELOC_CRX_REGREL22, R_CRX_REGREL22},
|
| 68 |
|
|
{BFD_RELOC_CRX_REGREL28, R_CRX_REGREL28},
|
| 69 |
|
|
{BFD_RELOC_CRX_REGREL32, R_CRX_REGREL32},
|
| 70 |
|
|
{BFD_RELOC_CRX_ABS16, R_CRX_ABS16},
|
| 71 |
|
|
{BFD_RELOC_CRX_ABS32, R_CRX_ABS32},
|
| 72 |
|
|
{BFD_RELOC_CRX_NUM8, R_CRX_NUM8},
|
| 73 |
|
|
{BFD_RELOC_CRX_NUM16, R_CRX_NUM16},
|
| 74 |
|
|
{BFD_RELOC_CRX_NUM32, R_CRX_NUM32},
|
| 75 |
|
|
{BFD_RELOC_CRX_IMM16, R_CRX_IMM16},
|
| 76 |
|
|
{BFD_RELOC_CRX_IMM32, R_CRX_IMM32},
|
| 77 |
|
|
{BFD_RELOC_CRX_SWITCH8, R_CRX_SWITCH8},
|
| 78 |
|
|
{BFD_RELOC_CRX_SWITCH16, R_CRX_SWITCH16},
|
| 79 |
|
|
{BFD_RELOC_CRX_SWITCH32, R_CRX_SWITCH32}
|
| 80 |
|
|
};
|
| 81 |
|
|
|
| 82 |
|
|
static reloc_howto_type crx_elf_howto_table[] =
|
| 83 |
|
|
{
|
| 84 |
|
|
HOWTO (R_CRX_NONE, /* type */
|
| 85 |
|
|
0, /* rightshift */
|
| 86 |
|
|
2, /* size */
|
| 87 |
|
|
32, /* bitsize */
|
| 88 |
|
|
FALSE, /* pc_relative */
|
| 89 |
|
|
0, /* bitpos */
|
| 90 |
|
|
complain_overflow_dont,/* complain_on_overflow */
|
| 91 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
| 92 |
|
|
"R_CRX_NONE", /* name */
|
| 93 |
|
|
FALSE, /* partial_inplace */
|
| 94 |
|
|
0, /* src_mask */
|
| 95 |
|
|
0, /* dst_mask */
|
| 96 |
|
|
FALSE), /* pcrel_offset */
|
| 97 |
|
|
|
| 98 |
|
|
HOWTO (R_CRX_REL4, /* type */
|
| 99 |
|
|
1, /* rightshift */
|
| 100 |
|
|
0, /* size */
|
| 101 |
|
|
4, /* bitsize */
|
| 102 |
|
|
TRUE, /* pc_relative */
|
| 103 |
|
|
0, /* bitpos */
|
| 104 |
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
| 105 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
| 106 |
|
|
"R_CRX_REL4", /* name */
|
| 107 |
|
|
FALSE, /* partial_inplace */
|
| 108 |
|
|
0x0, /* src_mask */
|
| 109 |
|
|
0xf, /* dst_mask */
|
| 110 |
|
|
FALSE), /* pcrel_offset */
|
| 111 |
|
|
|
| 112 |
|
|
HOWTO (R_CRX_REL8, /* type */
|
| 113 |
|
|
1, /* rightshift */
|
| 114 |
|
|
0, /* size */
|
| 115 |
|
|
8, /* bitsize */
|
| 116 |
|
|
TRUE, /* pc_relative */
|
| 117 |
|
|
0, /* bitpos */
|
| 118 |
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
| 119 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
| 120 |
|
|
"R_CRX_REL8", /* name */
|
| 121 |
|
|
FALSE, /* partial_inplace */
|
| 122 |
|
|
0x0, /* src_mask */
|
| 123 |
|
|
0xff, /* dst_mask */
|
| 124 |
|
|
FALSE), /* pcrel_offset */
|
| 125 |
|
|
|
| 126 |
|
|
HOWTO (R_CRX_REL8_CMP, /* type */
|
| 127 |
|
|
1, /* rightshift */
|
| 128 |
|
|
0, /* size */
|
| 129 |
|
|
8, /* bitsize */
|
| 130 |
|
|
TRUE, /* pc_relative */
|
| 131 |
|
|
0, /* bitpos */
|
| 132 |
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
| 133 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
| 134 |
|
|
"R_CRX_REL8_CMP", /* name */
|
| 135 |
|
|
FALSE, /* partial_inplace */
|
| 136 |
|
|
0x0, /* src_mask */
|
| 137 |
|
|
0xff, /* dst_mask */
|
| 138 |
|
|
FALSE), /* pcrel_offset */
|
| 139 |
|
|
|
| 140 |
|
|
HOWTO (R_CRX_REL16, /* type */
|
| 141 |
|
|
1, /* rightshift */
|
| 142 |
|
|
1, /* size */
|
| 143 |
|
|
16, /* bitsize */
|
| 144 |
|
|
TRUE, /* pc_relative */
|
| 145 |
|
|
0, /* bitpos */
|
| 146 |
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
| 147 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
| 148 |
|
|
"R_CRX_REL16", /* name */
|
| 149 |
|
|
FALSE, /* partial_inplace */
|
| 150 |
|
|
0x0, /* src_mask */
|
| 151 |
|
|
0xffff, /* dst_mask */
|
| 152 |
|
|
FALSE), /* pcrel_offset */
|
| 153 |
|
|
|
| 154 |
|
|
HOWTO (R_CRX_REL24, /* type */
|
| 155 |
|
|
1, /* rightshift */
|
| 156 |
|
|
2, /* size */
|
| 157 |
|
|
24, /* bitsize */
|
| 158 |
|
|
TRUE, /* pc_relative */
|
| 159 |
|
|
0, /* bitpos */
|
| 160 |
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
| 161 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
| 162 |
|
|
"R_CRX_REL24", /* name */
|
| 163 |
|
|
FALSE, /* partial_inplace */
|
| 164 |
|
|
0x0, /* src_mask */
|
| 165 |
|
|
0xffffff, /* dst_mask */
|
| 166 |
|
|
FALSE), /* pcrel_offset */
|
| 167 |
|
|
|
| 168 |
|
|
HOWTO (R_CRX_REL32, /* type */
|
| 169 |
|
|
1, /* rightshift */
|
| 170 |
|
|
2, /* size */
|
| 171 |
|
|
32, /* bitsize */
|
| 172 |
|
|
TRUE, /* pc_relative */
|
| 173 |
|
|
0, /* bitpos */
|
| 174 |
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
| 175 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
| 176 |
|
|
"R_CRX_REL32", /* name */
|
| 177 |
|
|
FALSE, /* partial_inplace */
|
| 178 |
|
|
0x0, /* src_mask */
|
| 179 |
|
|
0xffffffff, /* dst_mask */
|
| 180 |
|
|
FALSE), /* pcrel_offset */
|
| 181 |
|
|
|
| 182 |
|
|
HOWTO (R_CRX_REGREL12, /* type */
|
| 183 |
|
|
0, /* rightshift */
|
| 184 |
|
|
1, /* size */
|
| 185 |
|
|
12, /* bitsize */
|
| 186 |
|
|
FALSE, /* pc_relative */
|
| 187 |
|
|
0, /* bitpos */
|
| 188 |
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
| 189 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
| 190 |
|
|
"R_CRX_REGREL12", /* name */
|
| 191 |
|
|
FALSE, /* partial_inplace */
|
| 192 |
|
|
0x0, /* src_mask */
|
| 193 |
|
|
0xfff, /* dst_mask */
|
| 194 |
|
|
FALSE), /* pcrel_offset */
|
| 195 |
|
|
|
| 196 |
|
|
HOWTO (R_CRX_REGREL22, /* type */
|
| 197 |
|
|
0, /* rightshift */
|
| 198 |
|
|
2, /* size */
|
| 199 |
|
|
22, /* bitsize */
|
| 200 |
|
|
FALSE, /* pc_relative */
|
| 201 |
|
|
0, /* bitpos */
|
| 202 |
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
| 203 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
| 204 |
|
|
"R_CRX_REGREL22", /* name */
|
| 205 |
|
|
FALSE, /* partial_inplace */
|
| 206 |
|
|
0x0, /* src_mask */
|
| 207 |
|
|
0x3fffff, /* dst_mask */
|
| 208 |
|
|
FALSE), /* pcrel_offset */
|
| 209 |
|
|
|
| 210 |
|
|
HOWTO (R_CRX_REGREL28, /* type */
|
| 211 |
|
|
0, /* rightshift */
|
| 212 |
|
|
2, /* size */
|
| 213 |
|
|
28, /* bitsize */
|
| 214 |
|
|
FALSE, /* pc_relative */
|
| 215 |
|
|
0, /* bitpos */
|
| 216 |
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
| 217 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
| 218 |
|
|
"R_CRX_REGREL28", /* name */
|
| 219 |
|
|
FALSE, /* partial_inplace */
|
| 220 |
|
|
0x0, /* src_mask */
|
| 221 |
|
|
0xfffffff, /* dst_mask */
|
| 222 |
|
|
FALSE), /* pcrel_offset */
|
| 223 |
|
|
|
| 224 |
|
|
HOWTO (R_CRX_REGREL32, /* type */
|
| 225 |
|
|
0, /* rightshift */
|
| 226 |
|
|
2, /* size */
|
| 227 |
|
|
32, /* bitsize */
|
| 228 |
|
|
FALSE, /* pc_relative */
|
| 229 |
|
|
0, /* bitpos */
|
| 230 |
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
| 231 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
| 232 |
|
|
"R_CRX_REGREL32", /* name */
|
| 233 |
|
|
FALSE, /* partial_inplace */
|
| 234 |
|
|
0x0, /* src_mask */
|
| 235 |
|
|
0xffffffff, /* dst_mask */
|
| 236 |
|
|
FALSE), /* pcrel_offset */
|
| 237 |
|
|
|
| 238 |
|
|
HOWTO (R_CRX_ABS16, /* type */
|
| 239 |
|
|
0, /* rightshift */
|
| 240 |
|
|
1, /* size */
|
| 241 |
|
|
16, /* bitsize */
|
| 242 |
|
|
FALSE, /* pc_relative */
|
| 243 |
|
|
0, /* bitpos */
|
| 244 |
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
| 245 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
| 246 |
|
|
"R_CRX_ABS16", /* name */
|
| 247 |
|
|
FALSE, /* partial_inplace */
|
| 248 |
|
|
0x0, /* src_mask */
|
| 249 |
|
|
0xffff, /* dst_mask */
|
| 250 |
|
|
FALSE), /* pcrel_offset */
|
| 251 |
|
|
|
| 252 |
|
|
HOWTO (R_CRX_ABS32, /* type */
|
| 253 |
|
|
0, /* rightshift */
|
| 254 |
|
|
2, /* size */
|
| 255 |
|
|
32, /* bitsize */
|
| 256 |
|
|
FALSE, /* pc_relative */
|
| 257 |
|
|
0, /* bitpos */
|
| 258 |
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
| 259 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
| 260 |
|
|
"R_CRX_ABS32", /* name */
|
| 261 |
|
|
FALSE, /* partial_inplace */
|
| 262 |
|
|
0x0, /* src_mask */
|
| 263 |
|
|
0xffffffff, /* dst_mask */
|
| 264 |
|
|
FALSE), /* pcrel_offset */
|
| 265 |
|
|
|
| 266 |
|
|
HOWTO (R_CRX_NUM8, /* type */
|
| 267 |
|
|
0, /* rightshift */
|
| 268 |
|
|
0, /* size */
|
| 269 |
|
|
8, /* bitsize */
|
| 270 |
|
|
FALSE, /* pc_relative */
|
| 271 |
|
|
0, /* bitpos */
|
| 272 |
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
| 273 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
| 274 |
|
|
"R_CRX_NUM8", /* name */
|
| 275 |
|
|
FALSE, /* partial_inplace */
|
| 276 |
|
|
0x0, /* src_mask */
|
| 277 |
|
|
0xff, /* dst_mask */
|
| 278 |
|
|
FALSE), /* pcrel_offset */
|
| 279 |
|
|
|
| 280 |
|
|
HOWTO (R_CRX_NUM16, /* type */
|
| 281 |
|
|
0, /* rightshift */
|
| 282 |
|
|
1, /* size */
|
| 283 |
|
|
16, /* bitsize */
|
| 284 |
|
|
FALSE, /* pc_relative */
|
| 285 |
|
|
0, /* bitpos */
|
| 286 |
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
| 287 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
| 288 |
|
|
"R_CRX_NUM16", /* name */
|
| 289 |
|
|
FALSE, /* partial_inplace */
|
| 290 |
|
|
0x0, /* src_mask */
|
| 291 |
|
|
0xffff, /* dst_mask */
|
| 292 |
|
|
FALSE), /* pcrel_offset */
|
| 293 |
|
|
|
| 294 |
|
|
HOWTO (R_CRX_NUM32, /* type */
|
| 295 |
|
|
0, /* rightshift */
|
| 296 |
|
|
2, /* size */
|
| 297 |
|
|
32, /* bitsize */
|
| 298 |
|
|
FALSE, /* pc_relative */
|
| 299 |
|
|
0, /* bitpos */
|
| 300 |
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
| 301 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
| 302 |
|
|
"R_CRX_NUM32", /* name */
|
| 303 |
|
|
FALSE, /* partial_inplace */
|
| 304 |
|
|
0x0, /* src_mask */
|
| 305 |
|
|
0xffffffff, /* dst_mask */
|
| 306 |
|
|
FALSE), /* pcrel_offset */
|
| 307 |
|
|
|
| 308 |
|
|
HOWTO (R_CRX_IMM16, /* type */
|
| 309 |
|
|
0, /* rightshift */
|
| 310 |
|
|
1, /* size */
|
| 311 |
|
|
16, /* bitsize */
|
| 312 |
|
|
FALSE, /* pc_relative */
|
| 313 |
|
|
0, /* bitpos */
|
| 314 |
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
| 315 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
| 316 |
|
|
"R_CRX_IMM16", /* name */
|
| 317 |
|
|
FALSE, /* partial_inplace */
|
| 318 |
|
|
0x0, /* src_mask */
|
| 319 |
|
|
0xffff, /* dst_mask */
|
| 320 |
|
|
FALSE), /* pcrel_offset */
|
| 321 |
|
|
|
| 322 |
|
|
HOWTO (R_CRX_IMM32, /* type */
|
| 323 |
|
|
0, /* rightshift */
|
| 324 |
|
|
2, /* size */
|
| 325 |
|
|
32, /* bitsize */
|
| 326 |
|
|
FALSE, /* pc_relative */
|
| 327 |
|
|
0, /* bitpos */
|
| 328 |
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
| 329 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
| 330 |
|
|
"R_CRX_IMM32", /* name */
|
| 331 |
|
|
FALSE, /* partial_inplace */
|
| 332 |
|
|
0x0, /* src_mask */
|
| 333 |
|
|
0xffffffff, /* dst_mask */
|
| 334 |
|
|
FALSE), /* pcrel_offset */
|
| 335 |
|
|
|
| 336 |
|
|
/* An 8 bit switch table entry. This is generated for an expression
|
| 337 |
|
|
such as ``.byte L1 - L2''. The offset holds the difference
|
| 338 |
|
|
between the reloc address and L2. */
|
| 339 |
|
|
HOWTO (R_CRX_SWITCH8, /* type */
|
| 340 |
|
|
0, /* rightshift */
|
| 341 |
|
|
0, /* size (0 = byte, 1 = short, 2 = long) */
|
| 342 |
|
|
8, /* bitsize */
|
| 343 |
|
|
FALSE, /* pc_relative */
|
| 344 |
|
|
0, /* bitpos */
|
| 345 |
|
|
complain_overflow_unsigned, /* complain_on_overflow */
|
| 346 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
| 347 |
|
|
"R_CRX_SWITCH8", /* name */
|
| 348 |
|
|
FALSE, /* partial_inplace */
|
| 349 |
|
|
0x0, /* src_mask */
|
| 350 |
|
|
0xff, /* dst_mask */
|
| 351 |
|
|
TRUE), /* pcrel_offset */
|
| 352 |
|
|
|
| 353 |
|
|
/* A 16 bit switch table entry. This is generated for an expression
|
| 354 |
|
|
such as ``.word L1 - L2''. The offset holds the difference
|
| 355 |
|
|
between the reloc address and L2. */
|
| 356 |
|
|
HOWTO (R_CRX_SWITCH16, /* type */
|
| 357 |
|
|
0, /* rightshift */
|
| 358 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
| 359 |
|
|
16, /* bitsize */
|
| 360 |
|
|
FALSE, /* pc_relative */
|
| 361 |
|
|
0, /* bitpos */
|
| 362 |
|
|
complain_overflow_unsigned, /* complain_on_overflow */
|
| 363 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
| 364 |
|
|
"R_CRX_SWITCH16", /* name */
|
| 365 |
|
|
FALSE, /* partial_inplace */
|
| 366 |
|
|
0x0, /* src_mask */
|
| 367 |
|
|
0xffff, /* dst_mask */
|
| 368 |
|
|
TRUE), /* pcrel_offset */
|
| 369 |
|
|
|
| 370 |
|
|
/* A 32 bit switch table entry. This is generated for an expression
|
| 371 |
|
|
such as ``.long L1 - L2''. The offset holds the difference
|
| 372 |
|
|
between the reloc address and L2. */
|
| 373 |
|
|
HOWTO (R_CRX_SWITCH32, /* type */
|
| 374 |
|
|
0, /* rightshift */
|
| 375 |
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
| 376 |
|
|
32, /* bitsize */
|
| 377 |
|
|
FALSE, /* pc_relative */
|
| 378 |
|
|
0, /* bitpos */
|
| 379 |
|
|
complain_overflow_unsigned, /* complain_on_overflow */
|
| 380 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
| 381 |
|
|
"R_CRX_SWITCH32", /* name */
|
| 382 |
|
|
FALSE, /* partial_inplace */
|
| 383 |
|
|
0x0, /* src_mask */
|
| 384 |
|
|
0xffffffff, /* dst_mask */
|
| 385 |
|
|
TRUE) /* pcrel_offset */
|
| 386 |
|
|
};
|
| 387 |
|
|
|
| 388 |
|
|
/* Retrieve a howto ptr using a BFD reloc_code. */
|
| 389 |
|
|
|
| 390 |
|
|
static reloc_howto_type *
|
| 391 |
|
|
elf_crx_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
|
| 392 |
|
|
bfd_reloc_code_real_type code)
|
| 393 |
|
|
{
|
| 394 |
|
|
unsigned int i;
|
| 395 |
|
|
|
| 396 |
|
|
for (i = 0; i < R_CRX_MAX; i++)
|
| 397 |
|
|
if (code == crx_reloc_map[i].bfd_reloc_enum)
|
| 398 |
|
|
return &crx_elf_howto_table[crx_reloc_map[i].crx_reloc_type];
|
| 399 |
|
|
|
| 400 |
|
|
printf ("This relocation Type is not supported -0x%x\n", code);
|
| 401 |
|
|
return 0;
|
| 402 |
|
|
}
|
| 403 |
|
|
|
| 404 |
|
|
static reloc_howto_type *
|
| 405 |
|
|
elf_crx_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
|
| 406 |
|
|
const char *r_name)
|
| 407 |
|
|
{
|
| 408 |
|
|
unsigned int i;
|
| 409 |
|
|
|
| 410 |
|
|
for (i = 0;
|
| 411 |
|
|
i < sizeof (crx_elf_howto_table) / sizeof (crx_elf_howto_table[0]);
|
| 412 |
|
|
i++)
|
| 413 |
|
|
if (crx_elf_howto_table[i].name != NULL
|
| 414 |
|
|
&& strcasecmp (crx_elf_howto_table[i].name, r_name) == 0)
|
| 415 |
|
|
return &crx_elf_howto_table[i];
|
| 416 |
|
|
|
| 417 |
|
|
return NULL;
|
| 418 |
|
|
}
|
| 419 |
|
|
|
| 420 |
|
|
/* Retrieve a howto ptr using an internal relocation entry. */
|
| 421 |
|
|
|
| 422 |
|
|
static void
|
| 423 |
|
|
elf_crx_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
|
| 424 |
|
|
Elf_Internal_Rela *dst)
|
| 425 |
|
|
{
|
| 426 |
|
|
unsigned int r_type = ELF32_R_TYPE (dst->r_info);
|
| 427 |
|
|
BFD_ASSERT (r_type < (unsigned int) R_CRX_MAX);
|
| 428 |
|
|
cache_ptr->howto = &crx_elf_howto_table[r_type];
|
| 429 |
|
|
}
|
| 430 |
|
|
|
| 431 |
|
|
/* Perform a relocation as part of a final link. */
|
| 432 |
|
|
|
| 433 |
|
|
static bfd_reloc_status_type
|
| 434 |
|
|
crx_elf_final_link_relocate (reloc_howto_type *howto, bfd *input_bfd,
|
| 435 |
|
|
bfd *output_bfd ATTRIBUTE_UNUSED,
|
| 436 |
|
|
asection *input_section, bfd_byte *contents,
|
| 437 |
|
|
bfd_vma offset, bfd_vma Rvalue, bfd_vma addend,
|
| 438 |
|
|
struct bfd_link_info *info ATTRIBUTE_UNUSED,
|
| 439 |
|
|
asection *sec ATTRIBUTE_UNUSED,
|
| 440 |
|
|
int is_local ATTRIBUTE_UNUSED)
|
| 441 |
|
|
{
|
| 442 |
|
|
unsigned short r_type = howto->type;
|
| 443 |
|
|
bfd_byte *hit_data = contents + offset;
|
| 444 |
|
|
bfd_vma reloc_bits, check;
|
| 445 |
|
|
|
| 446 |
|
|
switch (r_type)
|
| 447 |
|
|
{
|
| 448 |
|
|
case R_CRX_IMM16:
|
| 449 |
|
|
case R_CRX_IMM32:
|
| 450 |
|
|
case R_CRX_ABS16:
|
| 451 |
|
|
case R_CRX_ABS32:
|
| 452 |
|
|
case R_CRX_REL8_CMP:
|
| 453 |
|
|
case R_CRX_REL16:
|
| 454 |
|
|
case R_CRX_REL24:
|
| 455 |
|
|
case R_CRX_REL32:
|
| 456 |
|
|
case R_CRX_REGREL12:
|
| 457 |
|
|
case R_CRX_REGREL22:
|
| 458 |
|
|
case R_CRX_REGREL28:
|
| 459 |
|
|
case R_CRX_REGREL32:
|
| 460 |
|
|
/* 'hit_data' is relative to the start of the instruction, not the
|
| 461 |
|
|
relocation offset. Advance it to account for the exact offset. */
|
| 462 |
|
|
hit_data += 2;
|
| 463 |
|
|
break;
|
| 464 |
|
|
|
| 465 |
|
|
case R_CRX_REL4:
|
| 466 |
|
|
/* This relocation type is used only in 'Branch if Equal to 0'
|
| 467 |
|
|
instructions and requires special handling. */
|
| 468 |
|
|
Rvalue -= 1;
|
| 469 |
|
|
break;
|
| 470 |
|
|
|
| 471 |
|
|
case R_CRX_NONE:
|
| 472 |
|
|
return bfd_reloc_ok;
|
| 473 |
|
|
break;
|
| 474 |
|
|
|
| 475 |
|
|
case R_CRX_SWITCH8:
|
| 476 |
|
|
case R_CRX_SWITCH16:
|
| 477 |
|
|
case R_CRX_SWITCH32:
|
| 478 |
|
|
/* We only care about the addend, where the difference between
|
| 479 |
|
|
expressions is kept. */
|
| 480 |
|
|
Rvalue = 0;
|
| 481 |
|
|
|
| 482 |
|
|
default:
|
| 483 |
|
|
break;
|
| 484 |
|
|
}
|
| 485 |
|
|
|
| 486 |
|
|
if (howto->pc_relative)
|
| 487 |
|
|
{
|
| 488 |
|
|
/* Subtract the address of the section containing the location. */
|
| 489 |
|
|
Rvalue -= (input_section->output_section->vma
|
| 490 |
|
|
+ input_section->output_offset);
|
| 491 |
|
|
/* Subtract the position of the location within the section. */
|
| 492 |
|
|
Rvalue -= offset;
|
| 493 |
|
|
}
|
| 494 |
|
|
|
| 495 |
|
|
/* Add in supplied addend. */
|
| 496 |
|
|
Rvalue += addend;
|
| 497 |
|
|
|
| 498 |
|
|
/* Complain if the bitfield overflows, whether it is considered
|
| 499 |
|
|
as signed or unsigned. */
|
| 500 |
|
|
check = Rvalue >> howto->rightshift;
|
| 501 |
|
|
|
| 502 |
|
|
/* Assumes two's complement. This expression avoids
|
| 503 |
|
|
overflow if howto->bitsize is the number of bits in
|
| 504 |
|
|
bfd_vma. */
|
| 505 |
|
|
reloc_bits = (((1 << (howto->bitsize - 1)) - 1) << 1) | 1;
|
| 506 |
|
|
|
| 507 |
|
|
if (((bfd_vma) check & ~reloc_bits) != 0
|
| 508 |
|
|
&& (((bfd_vma) check & ~reloc_bits)
|
| 509 |
|
|
!= (-(bfd_vma) 1 & ~reloc_bits)))
|
| 510 |
|
|
{
|
| 511 |
|
|
/* The above right shift is incorrect for a signed
|
| 512 |
|
|
value. See if turning on the upper bits fixes the
|
| 513 |
|
|
overflow. */
|
| 514 |
|
|
if (howto->rightshift && (bfd_signed_vma) Rvalue < 0)
|
| 515 |
|
|
{
|
| 516 |
|
|
check |= ((bfd_vma) - 1
|
| 517 |
|
|
& ~((bfd_vma) - 1
|
| 518 |
|
|
>> howto->rightshift));
|
| 519 |
|
|
if (((bfd_vma) check & ~reloc_bits)
|
| 520 |
|
|
!= (-(bfd_vma) 1 & ~reloc_bits))
|
| 521 |
|
|
return bfd_reloc_overflow;
|
| 522 |
|
|
}
|
| 523 |
|
|
else
|
| 524 |
|
|
return bfd_reloc_overflow;
|
| 525 |
|
|
}
|
| 526 |
|
|
|
| 527 |
|
|
/* Drop unwanted bits from the value we are relocating to. */
|
| 528 |
|
|
Rvalue >>= (bfd_vma) howto->rightshift;
|
| 529 |
|
|
|
| 530 |
|
|
/* Apply dst_mask to select only relocatable part of the insn. */
|
| 531 |
|
|
Rvalue &= howto->dst_mask;
|
| 532 |
|
|
|
| 533 |
|
|
switch (howto->size)
|
| 534 |
|
|
{
|
| 535 |
|
|
case 0:
|
| 536 |
|
|
if (r_type == R_CRX_REL4)
|
| 537 |
|
|
{
|
| 538 |
|
|
Rvalue <<= 4;
|
| 539 |
|
|
Rvalue |= (bfd_get_8 (input_bfd, hit_data) & 0x0f);
|
| 540 |
|
|
}
|
| 541 |
|
|
|
| 542 |
|
|
bfd_put_8 (input_bfd, (unsigned char) Rvalue, hit_data);
|
| 543 |
|
|
break;
|
| 544 |
|
|
|
| 545 |
|
|
case 1:
|
| 546 |
|
|
if (r_type == R_CRX_REGREL12)
|
| 547 |
|
|
Rvalue |= (bfd_get_16 (input_bfd, hit_data) & 0xf000);
|
| 548 |
|
|
|
| 549 |
|
|
bfd_put_16 (input_bfd, Rvalue, hit_data);
|
| 550 |
|
|
break;
|
| 551 |
|
|
|
| 552 |
|
|
case 2:
|
| 553 |
|
|
if (r_type == R_CRX_REL24
|
| 554 |
|
|
|| r_type == R_CRX_REGREL22
|
| 555 |
|
|
|| r_type == R_CRX_REGREL28)
|
| 556 |
|
|
Rvalue |= (((bfd_get_16 (input_bfd, hit_data) << 16) |
|
| 557 |
|
|
bfd_get_16 (input_bfd, hit_data + 2)) & ~howto->dst_mask);
|
| 558 |
|
|
|
| 559 |
|
|
if (r_type == R_CRX_NUM32 || r_type == R_CRX_SWITCH32)
|
| 560 |
|
|
/* Relocation on DATA is purely little-endian, that is, for a
|
| 561 |
|
|
multi-byte datum, the lowest address in memory contains the
|
| 562 |
|
|
little end of the datum, that is, the least significant byte.
|
| 563 |
|
|
Therefore we use BFD's byte Putting functions. */
|
| 564 |
|
|
bfd_put_32 (input_bfd, Rvalue, hit_data);
|
| 565 |
|
|
else
|
| 566 |
|
|
/* Relocation on INSTRUCTIONS is different : Instructions are
|
| 567 |
|
|
word-addressable, that is, each word itself is arranged according
|
| 568 |
|
|
to little-endian convention, whereas the words are arranged with
|
| 569 |
|
|
respect to one another in BIG ENDIAN fashion.
|
| 570 |
|
|
When there is an immediate value that spans a word boundary, it is
|
| 571 |
|
|
split in a big-endian way with respect to the words. */
|
| 572 |
|
|
{
|
| 573 |
|
|
bfd_put_16 (input_bfd, (Rvalue >> 16) & 0xffff, hit_data);
|
| 574 |
|
|
bfd_put_16 (input_bfd, Rvalue & 0xffff, hit_data + 2);
|
| 575 |
|
|
}
|
| 576 |
|
|
break;
|
| 577 |
|
|
|
| 578 |
|
|
default:
|
| 579 |
|
|
return bfd_reloc_notsupported;
|
| 580 |
|
|
}
|
| 581 |
|
|
|
| 582 |
|
|
return bfd_reloc_ok;
|
| 583 |
|
|
}
|
| 584 |
|
|
|
| 585 |
|
|
/* Delete some bytes from a section while relaxing. */
|
| 586 |
|
|
|
| 587 |
|
|
static bfd_boolean
|
| 588 |
|
|
elf32_crx_relax_delete_bytes (struct bfd_link_info *link_info, bfd *abfd,
|
| 589 |
|
|
asection *sec, bfd_vma addr, int count)
|
| 590 |
|
|
{
|
| 591 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
| 592 |
|
|
unsigned int sec_shndx;
|
| 593 |
|
|
bfd_byte *contents;
|
| 594 |
|
|
Elf_Internal_Rela *irel, *irelend;
|
| 595 |
|
|
bfd_vma toaddr;
|
| 596 |
|
|
Elf_Internal_Sym *isym;
|
| 597 |
|
|
Elf_Internal_Sym *isymend;
|
| 598 |
|
|
struct elf_link_hash_entry **sym_hashes;
|
| 599 |
|
|
struct elf_link_hash_entry **end_hashes;
|
| 600 |
|
|
struct elf_link_hash_entry **start_hashes;
|
| 601 |
|
|
unsigned int symcount;
|
| 602 |
|
|
|
| 603 |
|
|
sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
|
| 604 |
|
|
|
| 605 |
|
|
contents = elf_section_data (sec)->this_hdr.contents;
|
| 606 |
|
|
|
| 607 |
|
|
toaddr = sec->size;
|
| 608 |
|
|
|
| 609 |
|
|
irel = elf_section_data (sec)->relocs;
|
| 610 |
|
|
irelend = irel + sec->reloc_count;
|
| 611 |
|
|
|
| 612 |
|
|
/* Actually delete the bytes. */
|
| 613 |
|
|
memmove (contents + addr, contents + addr + count,
|
| 614 |
|
|
(size_t) (toaddr - addr - count));
|
| 615 |
|
|
sec->size -= count;
|
| 616 |
|
|
|
| 617 |
|
|
/* Adjust all the relocs. */
|
| 618 |
|
|
for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
|
| 619 |
|
|
{
|
| 620 |
|
|
/* Get the new reloc address. */
|
| 621 |
|
|
if ((irel->r_offset > addr
|
| 622 |
|
|
&& irel->r_offset < toaddr))
|
| 623 |
|
|
irel->r_offset -= count;
|
| 624 |
|
|
}
|
| 625 |
|
|
|
| 626 |
|
|
/* Adjust the local symbols defined in this section. */
|
| 627 |
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
| 628 |
|
|
isym = (Elf_Internal_Sym *) symtab_hdr->contents;
|
| 629 |
|
|
for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
|
| 630 |
|
|
{
|
| 631 |
|
|
if (isym->st_shndx == sec_shndx
|
| 632 |
|
|
&& isym->st_value > addr
|
| 633 |
|
|
&& isym->st_value < toaddr)
|
| 634 |
|
|
{
|
| 635 |
|
|
/* Adjust the addend of SWITCH relocations in this section,
|
| 636 |
|
|
which reference this local symbol. */
|
| 637 |
|
|
for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
|
| 638 |
|
|
{
|
| 639 |
|
|
unsigned long r_symndx;
|
| 640 |
|
|
Elf_Internal_Sym *rsym;
|
| 641 |
|
|
bfd_vma addsym, subsym;
|
| 642 |
|
|
|
| 643 |
|
|
/* Skip if not a SWITCH relocation. */
|
| 644 |
|
|
if (ELF32_R_TYPE (irel->r_info) != (int) R_CRX_SWITCH8
|
| 645 |
|
|
&& ELF32_R_TYPE (irel->r_info) != (int) R_CRX_SWITCH16
|
| 646 |
|
|
&& ELF32_R_TYPE (irel->r_info) != (int) R_CRX_SWITCH32)
|
| 647 |
|
|
continue;
|
| 648 |
|
|
|
| 649 |
|
|
r_symndx = ELF32_R_SYM (irel->r_info);
|
| 650 |
|
|
rsym = (Elf_Internal_Sym *) symtab_hdr->contents + r_symndx;
|
| 651 |
|
|
|
| 652 |
|
|
/* Skip if not the local adjusted symbol. */
|
| 653 |
|
|
if (rsym != isym)
|
| 654 |
|
|
continue;
|
| 655 |
|
|
|
| 656 |
|
|
addsym = isym->st_value;
|
| 657 |
|
|
subsym = addsym - irel->r_addend;
|
| 658 |
|
|
|
| 659 |
|
|
/* Fix the addend only when -->> (addsym > addr >= subsym). */
|
| 660 |
|
|
if (subsym <= addr)
|
| 661 |
|
|
irel->r_addend -= count;
|
| 662 |
|
|
else
|
| 663 |
|
|
continue;
|
| 664 |
|
|
}
|
| 665 |
|
|
|
| 666 |
|
|
isym->st_value -= count;
|
| 667 |
|
|
}
|
| 668 |
|
|
}
|
| 669 |
|
|
|
| 670 |
|
|
/* Now adjust the global symbols defined in this section. */
|
| 671 |
|
|
symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
|
| 672 |
|
|
- symtab_hdr->sh_info);
|
| 673 |
|
|
sym_hashes = start_hashes = elf_sym_hashes (abfd);
|
| 674 |
|
|
end_hashes = sym_hashes + symcount;
|
| 675 |
|
|
|
| 676 |
|
|
for (; sym_hashes < end_hashes; sym_hashes++)
|
| 677 |
|
|
{
|
| 678 |
|
|
struct elf_link_hash_entry *sym_hash = *sym_hashes;
|
| 679 |
|
|
|
| 680 |
|
|
/* The '--wrap SYMBOL' option is causing a pain when the object file,
|
| 681 |
|
|
containing the definition of __wrap_SYMBOL, includes a direct
|
| 682 |
|
|
call to SYMBOL as well. Since both __wrap_SYMBOL and SYMBOL reference
|
| 683 |
|
|
the same symbol (which is __wrap_SYMBOL), but still exist as two
|
| 684 |
|
|
different symbols in 'sym_hashes', we don't want to adjust
|
| 685 |
|
|
the global symbol __wrap_SYMBOL twice.
|
| 686 |
|
|
This check is only relevant when symbols are being wrapped. */
|
| 687 |
|
|
if (link_info->wrap_hash != NULL)
|
| 688 |
|
|
{
|
| 689 |
|
|
struct elf_link_hash_entry **cur_sym_hashes;
|
| 690 |
|
|
|
| 691 |
|
|
/* Loop only over the symbols whom been already checked. */
|
| 692 |
|
|
for (cur_sym_hashes = start_hashes; cur_sym_hashes < sym_hashes;
|
| 693 |
|
|
cur_sym_hashes++)
|
| 694 |
|
|
{
|
| 695 |
|
|
/* If the current symbol is identical to 'sym_hash', that means
|
| 696 |
|
|
the symbol was already adjusted (or at least checked). */
|
| 697 |
|
|
if (*cur_sym_hashes == sym_hash)
|
| 698 |
|
|
break;
|
| 699 |
|
|
}
|
| 700 |
|
|
/* Don't adjust the symbol again. */
|
| 701 |
|
|
if (cur_sym_hashes < sym_hashes)
|
| 702 |
|
|
continue;
|
| 703 |
|
|
}
|
| 704 |
|
|
|
| 705 |
|
|
if ((sym_hash->root.type == bfd_link_hash_defined
|
| 706 |
|
|
|| sym_hash->root.type == bfd_link_hash_defweak)
|
| 707 |
|
|
&& sym_hash->root.u.def.section == sec
|
| 708 |
|
|
&& sym_hash->root.u.def.value > addr
|
| 709 |
|
|
&& sym_hash->root.u.def.value < toaddr)
|
| 710 |
|
|
sym_hash->root.u.def.value -= count;
|
| 711 |
|
|
}
|
| 712 |
|
|
|
| 713 |
|
|
return TRUE;
|
| 714 |
|
|
}
|
| 715 |
|
|
|
| 716 |
|
|
/* This is a version of bfd_generic_get_relocated_section_contents
|
| 717 |
|
|
which uses elf32_crx_relocate_section. */
|
| 718 |
|
|
|
| 719 |
|
|
static bfd_byte *
|
| 720 |
|
|
elf32_crx_get_relocated_section_contents (bfd *output_bfd,
|
| 721 |
|
|
struct bfd_link_info *link_info,
|
| 722 |
|
|
struct bfd_link_order *link_order,
|
| 723 |
|
|
bfd_byte *data,
|
| 724 |
|
|
bfd_boolean relocatable,
|
| 725 |
|
|
asymbol **symbols)
|
| 726 |
|
|
{
|
| 727 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
| 728 |
|
|
asection *input_section = link_order->u.indirect.section;
|
| 729 |
|
|
bfd *input_bfd = input_section->owner;
|
| 730 |
|
|
asection **sections = NULL;
|
| 731 |
|
|
Elf_Internal_Rela *internal_relocs = NULL;
|
| 732 |
|
|
Elf_Internal_Sym *isymbuf = NULL;
|
| 733 |
|
|
|
| 734 |
|
|
/* We only need to handle the case of relaxing, or of having a
|
| 735 |
|
|
particular set of section contents, specially. */
|
| 736 |
|
|
if (relocatable
|
| 737 |
|
|
|| elf_section_data (input_section)->this_hdr.contents == NULL)
|
| 738 |
|
|
return bfd_generic_get_relocated_section_contents (output_bfd, link_info,
|
| 739 |
|
|
link_order, data,
|
| 740 |
|
|
relocatable,
|
| 741 |
|
|
symbols);
|
| 742 |
|
|
|
| 743 |
|
|
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
| 744 |
|
|
|
| 745 |
|
|
memcpy (data, elf_section_data (input_section)->this_hdr.contents,
|
| 746 |
|
|
(size_t) input_section->size);
|
| 747 |
|
|
|
| 748 |
|
|
if ((input_section->flags & SEC_RELOC) != 0
|
| 749 |
|
|
&& input_section->reloc_count > 0)
|
| 750 |
|
|
{
|
| 751 |
|
|
Elf_Internal_Sym *isym;
|
| 752 |
|
|
Elf_Internal_Sym *isymend;
|
| 753 |
|
|
asection **secpp;
|
| 754 |
|
|
bfd_size_type amt;
|
| 755 |
|
|
|
| 756 |
|
|
internal_relocs = (_bfd_elf_link_read_relocs
|
| 757 |
|
|
(input_bfd, input_section, (PTR) NULL,
|
| 758 |
|
|
(Elf_Internal_Rela *) NULL, FALSE));
|
| 759 |
|
|
if (internal_relocs == NULL)
|
| 760 |
|
|
goto error_return;
|
| 761 |
|
|
|
| 762 |
|
|
if (symtab_hdr->sh_info != 0)
|
| 763 |
|
|
{
|
| 764 |
|
|
isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
|
| 765 |
|
|
if (isymbuf == NULL)
|
| 766 |
|
|
isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
|
| 767 |
|
|
symtab_hdr->sh_info, 0,
|
| 768 |
|
|
NULL, NULL, NULL);
|
| 769 |
|
|
if (isymbuf == NULL)
|
| 770 |
|
|
goto error_return;
|
| 771 |
|
|
}
|
| 772 |
|
|
|
| 773 |
|
|
amt = symtab_hdr->sh_info;
|
| 774 |
|
|
amt *= sizeof (asection *);
|
| 775 |
|
|
sections = bfd_malloc (amt);
|
| 776 |
|
|
if (sections == NULL && amt != 0)
|
| 777 |
|
|
goto error_return;
|
| 778 |
|
|
|
| 779 |
|
|
isymend = isymbuf + symtab_hdr->sh_info;
|
| 780 |
|
|
for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp)
|
| 781 |
|
|
{
|
| 782 |
|
|
asection *isec;
|
| 783 |
|
|
|
| 784 |
|
|
if (isym->st_shndx == SHN_UNDEF)
|
| 785 |
|
|
isec = bfd_und_section_ptr;
|
| 786 |
|
|
else if (isym->st_shndx == SHN_ABS)
|
| 787 |
|
|
isec = bfd_abs_section_ptr;
|
| 788 |
|
|
else if (isym->st_shndx == SHN_COMMON)
|
| 789 |
|
|
isec = bfd_com_section_ptr;
|
| 790 |
|
|
else
|
| 791 |
|
|
isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx);
|
| 792 |
|
|
|
| 793 |
|
|
*secpp = isec;
|
| 794 |
|
|
}
|
| 795 |
|
|
|
| 796 |
|
|
if (! elf32_crx_relocate_section (output_bfd, link_info, input_bfd,
|
| 797 |
|
|
input_section, data, internal_relocs,
|
| 798 |
|
|
isymbuf, sections))
|
| 799 |
|
|
goto error_return;
|
| 800 |
|
|
|
| 801 |
|
|
if (sections != NULL)
|
| 802 |
|
|
free (sections);
|
| 803 |
|
|
if (isymbuf != NULL
|
| 804 |
|
|
&& symtab_hdr->contents != (unsigned char *) isymbuf)
|
| 805 |
|
|
free (isymbuf);
|
| 806 |
|
|
if (elf_section_data (input_section)->relocs != internal_relocs)
|
| 807 |
|
|
free (internal_relocs);
|
| 808 |
|
|
}
|
| 809 |
|
|
|
| 810 |
|
|
return data;
|
| 811 |
|
|
|
| 812 |
|
|
error_return:
|
| 813 |
|
|
if (sections != NULL)
|
| 814 |
|
|
free (sections);
|
| 815 |
|
|
if (isymbuf != NULL
|
| 816 |
|
|
&& symtab_hdr->contents != (unsigned char *) isymbuf)
|
| 817 |
|
|
free (isymbuf);
|
| 818 |
|
|
if (internal_relocs != NULL
|
| 819 |
|
|
&& elf_section_data (input_section)->relocs != internal_relocs)
|
| 820 |
|
|
free (internal_relocs);
|
| 821 |
|
|
return NULL;
|
| 822 |
|
|
}
|
| 823 |
|
|
|
| 824 |
|
|
/* Relocate a CRX ELF section. */
|
| 825 |
|
|
|
| 826 |
|
|
static bfd_boolean
|
| 827 |
|
|
elf32_crx_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
|
| 828 |
|
|
bfd *input_bfd, asection *input_section,
|
| 829 |
|
|
bfd_byte *contents, Elf_Internal_Rela *relocs,
|
| 830 |
|
|
Elf_Internal_Sym *local_syms,
|
| 831 |
|
|
asection **local_sections)
|
| 832 |
|
|
{
|
| 833 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
| 834 |
|
|
struct elf_link_hash_entry **sym_hashes;
|
| 835 |
|
|
Elf_Internal_Rela *rel, *relend;
|
| 836 |
|
|
|
| 837 |
|
|
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
| 838 |
|
|
sym_hashes = elf_sym_hashes (input_bfd);
|
| 839 |
|
|
|
| 840 |
|
|
rel = relocs;
|
| 841 |
|
|
relend = relocs + input_section->reloc_count;
|
| 842 |
|
|
for (; rel < relend; rel++)
|
| 843 |
|
|
{
|
| 844 |
|
|
int r_type;
|
| 845 |
|
|
reloc_howto_type *howto;
|
| 846 |
|
|
unsigned long r_symndx;
|
| 847 |
|
|
Elf_Internal_Sym *sym;
|
| 848 |
|
|
asection *sec;
|
| 849 |
|
|
struct elf_link_hash_entry *h;
|
| 850 |
|
|
bfd_vma relocation;
|
| 851 |
|
|
bfd_reloc_status_type r;
|
| 852 |
|
|
|
| 853 |
|
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
| 854 |
|
|
r_type = ELF32_R_TYPE (rel->r_info);
|
| 855 |
|
|
howto = crx_elf_howto_table + (r_type);
|
| 856 |
|
|
|
| 857 |
|
|
h = NULL;
|
| 858 |
|
|
sym = NULL;
|
| 859 |
|
|
sec = NULL;
|
| 860 |
|
|
if (r_symndx < symtab_hdr->sh_info)
|
| 861 |
|
|
{
|
| 862 |
|
|
sym = local_syms + r_symndx;
|
| 863 |
|
|
sec = local_sections[r_symndx];
|
| 864 |
|
|
relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
|
| 865 |
|
|
}
|
| 866 |
|
|
else
|
| 867 |
|
|
{
|
| 868 |
|
|
bfd_boolean unresolved_reloc, warned;
|
| 869 |
|
|
|
| 870 |
|
|
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
|
| 871 |
|
|
r_symndx, symtab_hdr, sym_hashes,
|
| 872 |
|
|
h, sec, relocation,
|
| 873 |
|
|
unresolved_reloc, warned);
|
| 874 |
|
|
}
|
| 875 |
|
|
|
| 876 |
|
|
if (sec != NULL && elf_discarded_section (sec))
|
| 877 |
|
|
RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
|
| 878 |
|
|
rel, relend, howto, contents);
|
| 879 |
|
|
|
| 880 |
|
|
if (info->relocatable)
|
| 881 |
|
|
continue;
|
| 882 |
|
|
|
| 883 |
|
|
r = crx_elf_final_link_relocate (howto, input_bfd, output_bfd,
|
| 884 |
|
|
input_section,
|
| 885 |
|
|
contents, rel->r_offset,
|
| 886 |
|
|
relocation, rel->r_addend,
|
| 887 |
|
|
info, sec, h == NULL);
|
| 888 |
|
|
|
| 889 |
|
|
if (r != bfd_reloc_ok)
|
| 890 |
|
|
{
|
| 891 |
|
|
const char *name;
|
| 892 |
|
|
const char *msg = (const char *) 0;
|
| 893 |
|
|
|
| 894 |
|
|
if (h != NULL)
|
| 895 |
|
|
name = h->root.root.string;
|
| 896 |
|
|
else
|
| 897 |
|
|
{
|
| 898 |
|
|
name = (bfd_elf_string_from_elf_section
|
| 899 |
|
|
(input_bfd, symtab_hdr->sh_link, sym->st_name));
|
| 900 |
|
|
if (name == NULL || *name == '\0')
|
| 901 |
|
|
name = bfd_section_name (input_bfd, sec);
|
| 902 |
|
|
}
|
| 903 |
|
|
|
| 904 |
|
|
switch (r)
|
| 905 |
|
|
{
|
| 906 |
|
|
case bfd_reloc_overflow:
|
| 907 |
|
|
if (!((*info->callbacks->reloc_overflow)
|
| 908 |
|
|
(info, (h ? &h->root : NULL), name, howto->name,
|
| 909 |
|
|
(bfd_vma) 0, input_bfd, input_section,
|
| 910 |
|
|
rel->r_offset)))
|
| 911 |
|
|
return FALSE;
|
| 912 |
|
|
break;
|
| 913 |
|
|
|
| 914 |
|
|
case bfd_reloc_undefined:
|
| 915 |
|
|
if (!((*info->callbacks->undefined_symbol)
|
| 916 |
|
|
(info, name, input_bfd, input_section,
|
| 917 |
|
|
rel->r_offset, TRUE)))
|
| 918 |
|
|
return FALSE;
|
| 919 |
|
|
break;
|
| 920 |
|
|
|
| 921 |
|
|
case bfd_reloc_outofrange:
|
| 922 |
|
|
msg = _("internal error: out of range error");
|
| 923 |
|
|
goto common_error;
|
| 924 |
|
|
|
| 925 |
|
|
case bfd_reloc_notsupported:
|
| 926 |
|
|
msg = _("internal error: unsupported relocation error");
|
| 927 |
|
|
goto common_error;
|
| 928 |
|
|
|
| 929 |
|
|
case bfd_reloc_dangerous:
|
| 930 |
|
|
msg = _("internal error: dangerous error");
|
| 931 |
|
|
goto common_error;
|
| 932 |
|
|
|
| 933 |
|
|
default:
|
| 934 |
|
|
msg = _("internal error: unknown error");
|
| 935 |
|
|
/* Fall through. */
|
| 936 |
|
|
|
| 937 |
|
|
common_error:
|
| 938 |
|
|
if (!((*info->callbacks->warning)
|
| 939 |
|
|
(info, msg, name, input_bfd, input_section,
|
| 940 |
|
|
rel->r_offset)))
|
| 941 |
|
|
return FALSE;
|
| 942 |
|
|
break;
|
| 943 |
|
|
}
|
| 944 |
|
|
}
|
| 945 |
|
|
}
|
| 946 |
|
|
|
| 947 |
|
|
return TRUE;
|
| 948 |
|
|
}
|
| 949 |
|
|
|
| 950 |
|
|
/* This function handles relaxing for the CRX.
|
| 951 |
|
|
|
| 952 |
|
|
There's quite a few relaxing opportunites available on the CRX:
|
| 953 |
|
|
|
| 954 |
|
|
* bal/bcond:32 -> bal/bcond:16 2 bytes
|
| 955 |
|
|
* bcond:16 -> bcond:8 2 bytes
|
| 956 |
|
|
* cmpbcond:24 -> cmpbcond:8 2 bytes
|
| 957 |
|
|
* arithmetic imm32 -> arithmetic imm16 2 bytes
|
| 958 |
|
|
|
| 959 |
|
|
Symbol- and reloc-reading infrastructure copied from elf-m10200.c. */
|
| 960 |
|
|
|
| 961 |
|
|
static bfd_boolean
|
| 962 |
|
|
elf32_crx_relax_section (bfd *abfd, asection *sec,
|
| 963 |
|
|
struct bfd_link_info *link_info, bfd_boolean *again)
|
| 964 |
|
|
{
|
| 965 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
| 966 |
|
|
Elf_Internal_Rela *internal_relocs;
|
| 967 |
|
|
Elf_Internal_Rela *irel, *irelend;
|
| 968 |
|
|
bfd_byte *contents = NULL;
|
| 969 |
|
|
Elf_Internal_Sym *isymbuf = NULL;
|
| 970 |
|
|
|
| 971 |
|
|
/* Assume nothing changes. */
|
| 972 |
|
|
*again = FALSE;
|
| 973 |
|
|
|
| 974 |
|
|
/* We don't have to do anything for a relocatable link, if
|
| 975 |
|
|
this section does not have relocs, or if this is not a
|
| 976 |
|
|
code section. */
|
| 977 |
|
|
if (link_info->relocatable
|
| 978 |
|
|
|| (sec->flags & SEC_RELOC) == 0
|
| 979 |
|
|
|| sec->reloc_count == 0
|
| 980 |
|
|
|| (sec->flags & SEC_CODE) == 0)
|
| 981 |
|
|
return TRUE;
|
| 982 |
|
|
|
| 983 |
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
| 984 |
|
|
|
| 985 |
|
|
/* Get a copy of the native relocations. */
|
| 986 |
|
|
internal_relocs = (_bfd_elf_link_read_relocs
|
| 987 |
|
|
(abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
|
| 988 |
|
|
link_info->keep_memory));
|
| 989 |
|
|
if (internal_relocs == NULL)
|
| 990 |
|
|
goto error_return;
|
| 991 |
|
|
|
| 992 |
|
|
/* Walk through them looking for relaxing opportunities. */
|
| 993 |
|
|
irelend = internal_relocs + sec->reloc_count;
|
| 994 |
|
|
for (irel = internal_relocs; irel < irelend; irel++)
|
| 995 |
|
|
{
|
| 996 |
|
|
bfd_vma symval;
|
| 997 |
|
|
|
| 998 |
|
|
/* If this isn't something that can be relaxed, then ignore
|
| 999 |
|
|
this reloc. */
|
| 1000 |
|
|
if (ELF32_R_TYPE (irel->r_info) != (int) R_CRX_REL32
|
| 1001 |
|
|
&& ELF32_R_TYPE (irel->r_info) != (int) R_CRX_REL16
|
| 1002 |
|
|
&& ELF32_R_TYPE (irel->r_info) != (int) R_CRX_REL24
|
| 1003 |
|
|
&& ELF32_R_TYPE (irel->r_info) != (int) R_CRX_IMM32)
|
| 1004 |
|
|
continue;
|
| 1005 |
|
|
|
| 1006 |
|
|
/* Get the section contents if we haven't done so already. */
|
| 1007 |
|
|
if (contents == NULL)
|
| 1008 |
|
|
{
|
| 1009 |
|
|
/* Get cached copy if it exists. */
|
| 1010 |
|
|
if (elf_section_data (sec)->this_hdr.contents != NULL)
|
| 1011 |
|
|
contents = elf_section_data (sec)->this_hdr.contents;
|
| 1012 |
|
|
/* Go get them off disk. */
|
| 1013 |
|
|
else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
|
| 1014 |
|
|
goto error_return;
|
| 1015 |
|
|
}
|
| 1016 |
|
|
|
| 1017 |
|
|
/* Read this BFD's local symbols if we haven't done so already. */
|
| 1018 |
|
|
if (isymbuf == NULL && symtab_hdr->sh_info != 0)
|
| 1019 |
|
|
{
|
| 1020 |
|
|
isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
|
| 1021 |
|
|
if (isymbuf == NULL)
|
| 1022 |
|
|
isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
|
| 1023 |
|
|
symtab_hdr->sh_info, 0,
|
| 1024 |
|
|
NULL, NULL, NULL);
|
| 1025 |
|
|
if (isymbuf == NULL)
|
| 1026 |
|
|
goto error_return;
|
| 1027 |
|
|
}
|
| 1028 |
|
|
|
| 1029 |
|
|
/* Get the value of the symbol referred to by the reloc. */
|
| 1030 |
|
|
if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
|
| 1031 |
|
|
{
|
| 1032 |
|
|
/* A local symbol. */
|
| 1033 |
|
|
Elf_Internal_Sym *isym;
|
| 1034 |
|
|
asection *sym_sec;
|
| 1035 |
|
|
|
| 1036 |
|
|
isym = isymbuf + ELF32_R_SYM (irel->r_info);
|
| 1037 |
|
|
if (isym->st_shndx == SHN_UNDEF)
|
| 1038 |
|
|
sym_sec = bfd_und_section_ptr;
|
| 1039 |
|
|
else if (isym->st_shndx == SHN_ABS)
|
| 1040 |
|
|
sym_sec = bfd_abs_section_ptr;
|
| 1041 |
|
|
else if (isym->st_shndx == SHN_COMMON)
|
| 1042 |
|
|
sym_sec = bfd_com_section_ptr;
|
| 1043 |
|
|
else
|
| 1044 |
|
|
sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
|
| 1045 |
|
|
symval = (isym->st_value
|
| 1046 |
|
|
+ sym_sec->output_section->vma
|
| 1047 |
|
|
+ sym_sec->output_offset);
|
| 1048 |
|
|
}
|
| 1049 |
|
|
else
|
| 1050 |
|
|
{
|
| 1051 |
|
|
unsigned long indx;
|
| 1052 |
|
|
struct elf_link_hash_entry *h;
|
| 1053 |
|
|
|
| 1054 |
|
|
/* An external symbol. */
|
| 1055 |
|
|
indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
|
| 1056 |
|
|
h = elf_sym_hashes (abfd)[indx];
|
| 1057 |
|
|
BFD_ASSERT (h != NULL);
|
| 1058 |
|
|
|
| 1059 |
|
|
if (h->root.type != bfd_link_hash_defined
|
| 1060 |
|
|
&& h->root.type != bfd_link_hash_defweak)
|
| 1061 |
|
|
/* This appears to be a reference to an undefined
|
| 1062 |
|
|
symbol. Just ignore it--it will be caught by the
|
| 1063 |
|
|
regular reloc processing. */
|
| 1064 |
|
|
continue;
|
| 1065 |
|
|
|
| 1066 |
|
|
symval = (h->root.u.def.value
|
| 1067 |
|
|
+ h->root.u.def.section->output_section->vma
|
| 1068 |
|
|
+ h->root.u.def.section->output_offset);
|
| 1069 |
|
|
}
|
| 1070 |
|
|
|
| 1071 |
|
|
/* For simplicity of coding, we are going to modify the section
|
| 1072 |
|
|
contents, the section relocs, and the BFD symbol table. We
|
| 1073 |
|
|
must tell the rest of the code not to free up this
|
| 1074 |
|
|
information. It would be possible to instead create a table
|
| 1075 |
|
|
of changes which have to be made, as is done in coff-mips.c;
|
| 1076 |
|
|
that would be more work, but would require less memory when
|
| 1077 |
|
|
the linker is run. */
|
| 1078 |
|
|
|
| 1079 |
|
|
/* Try to turn a 32bit pc-relative branch/call into
|
| 1080 |
|
|
a 16bit pc-relative branch/call. */
|
| 1081 |
|
|
if (ELF32_R_TYPE (irel->r_info) == (int) R_CRX_REL32)
|
| 1082 |
|
|
{
|
| 1083 |
|
|
bfd_vma value = symval;
|
| 1084 |
|
|
|
| 1085 |
|
|
/* Deal with pc-relative gunk. */
|
| 1086 |
|
|
value -= (sec->output_section->vma + sec->output_offset);
|
| 1087 |
|
|
value -= irel->r_offset;
|
| 1088 |
|
|
value += irel->r_addend;
|
| 1089 |
|
|
|
| 1090 |
|
|
/* See if the value will fit in 16 bits, note the high value is
|
| 1091 |
|
|
0xfffe + 2 as the target will be two bytes closer if we are
|
| 1092 |
|
|
able to relax. */
|
| 1093 |
|
|
if ((long) value < 0x10000 && (long) value > -0x10002)
|
| 1094 |
|
|
{
|
| 1095 |
|
|
unsigned short code;
|
| 1096 |
|
|
|
| 1097 |
|
|
/* Get the opcode. */
|
| 1098 |
|
|
code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset);
|
| 1099 |
|
|
|
| 1100 |
|
|
/* Verify it's a 'bal'/'bcond' and fix the opcode. */
|
| 1101 |
|
|
if ((code & 0xfff0) == 0x3170)
|
| 1102 |
|
|
bfd_put_8 (abfd, 0x30, contents + irel->r_offset + 1);
|
| 1103 |
|
|
else if ((code & 0xf0ff) == 0x707f)
|
| 1104 |
|
|
bfd_put_8 (abfd, 0x7e, contents + irel->r_offset);
|
| 1105 |
|
|
else
|
| 1106 |
|
|
continue;
|
| 1107 |
|
|
|
| 1108 |
|
|
/* Note that we've changed the relocs, section contents, etc. */
|
| 1109 |
|
|
elf_section_data (sec)->relocs = internal_relocs;
|
| 1110 |
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
| 1111 |
|
|
symtab_hdr->contents = (unsigned char *) isymbuf;
|
| 1112 |
|
|
|
| 1113 |
|
|
/* Fix the relocation's type. */
|
| 1114 |
|
|
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
| 1115 |
|
|
R_CRX_REL16);
|
| 1116 |
|
|
|
| 1117 |
|
|
/* Delete two bytes of data. */
|
| 1118 |
|
|
if (!elf32_crx_relax_delete_bytes (link_info, abfd, sec,
|
| 1119 |
|
|
irel->r_offset + 2, 2))
|
| 1120 |
|
|
goto error_return;
|
| 1121 |
|
|
|
| 1122 |
|
|
/* That will change things, so, we should relax again.
|
| 1123 |
|
|
Note that this is not required, and it may be slow. */
|
| 1124 |
|
|
*again = TRUE;
|
| 1125 |
|
|
}
|
| 1126 |
|
|
}
|
| 1127 |
|
|
|
| 1128 |
|
|
/* Try to turn a 16bit pc-relative branch into an
|
| 1129 |
|
|
8bit pc-relative branch. */
|
| 1130 |
|
|
if (ELF32_R_TYPE (irel->r_info) == (int) R_CRX_REL16)
|
| 1131 |
|
|
{
|
| 1132 |
|
|
bfd_vma value = symval;
|
| 1133 |
|
|
|
| 1134 |
|
|
/* Deal with pc-relative gunk. */
|
| 1135 |
|
|
value -= (sec->output_section->vma + sec->output_offset);
|
| 1136 |
|
|
value -= irel->r_offset;
|
| 1137 |
|
|
value += irel->r_addend;
|
| 1138 |
|
|
|
| 1139 |
|
|
/* See if the value will fit in 8 bits, note the high value is
|
| 1140 |
|
|
0xfc + 2 as the target will be two bytes closer if we are
|
| 1141 |
|
|
able to relax. */
|
| 1142 |
|
|
if ((long) value < 0xfe && (long) value > -0x100)
|
| 1143 |
|
|
{
|
| 1144 |
|
|
unsigned short code;
|
| 1145 |
|
|
|
| 1146 |
|
|
/* Get the opcode. */
|
| 1147 |
|
|
code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset);
|
| 1148 |
|
|
|
| 1149 |
|
|
/* Verify it's a 'bcond' opcode. */
|
| 1150 |
|
|
if ((code & 0xf0ff) != 0x707e)
|
| 1151 |
|
|
continue;
|
| 1152 |
|
|
|
| 1153 |
|
|
/* Note that we've changed the relocs, section contents, etc. */
|
| 1154 |
|
|
elf_section_data (sec)->relocs = internal_relocs;
|
| 1155 |
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
| 1156 |
|
|
symtab_hdr->contents = (unsigned char *) isymbuf;
|
| 1157 |
|
|
|
| 1158 |
|
|
/* Fix the relocation's type. */
|
| 1159 |
|
|
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
| 1160 |
|
|
R_CRX_REL8);
|
| 1161 |
|
|
|
| 1162 |
|
|
/* Delete two bytes of data. */
|
| 1163 |
|
|
if (!elf32_crx_relax_delete_bytes (link_info, abfd, sec,
|
| 1164 |
|
|
irel->r_offset + 2, 2))
|
| 1165 |
|
|
goto error_return;
|
| 1166 |
|
|
|
| 1167 |
|
|
/* That will change things, so, we should relax again.
|
| 1168 |
|
|
Note that this is not required, and it may be slow. */
|
| 1169 |
|
|
*again = TRUE;
|
| 1170 |
|
|
}
|
| 1171 |
|
|
}
|
| 1172 |
|
|
|
| 1173 |
|
|
/* Try to turn a 24bit pc-relative cmp&branch into
|
| 1174 |
|
|
an 8bit pc-relative cmp&branch. */
|
| 1175 |
|
|
if (ELF32_R_TYPE (irel->r_info) == (int) R_CRX_REL24)
|
| 1176 |
|
|
{
|
| 1177 |
|
|
bfd_vma value = symval;
|
| 1178 |
|
|
|
| 1179 |
|
|
/* Deal with pc-relative gunk. */
|
| 1180 |
|
|
value -= (sec->output_section->vma + sec->output_offset);
|
| 1181 |
|
|
value -= irel->r_offset;
|
| 1182 |
|
|
value += irel->r_addend;
|
| 1183 |
|
|
|
| 1184 |
|
|
/* See if the value will fit in 8 bits, note the high value is
|
| 1185 |
|
|
0x7e + 2 as the target will be two bytes closer if we are
|
| 1186 |
|
|
able to relax. */
|
| 1187 |
|
|
if ((long) value < 0x100 && (long) value > -0x100)
|
| 1188 |
|
|
{
|
| 1189 |
|
|
unsigned short code;
|
| 1190 |
|
|
|
| 1191 |
|
|
/* Get the opcode. */
|
| 1192 |
|
|
code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset);
|
| 1193 |
|
|
|
| 1194 |
|
|
/* Verify it's a 'cmp&branch' opcode. */
|
| 1195 |
|
|
if ((code & 0xfff0) != 0x3180 && (code & 0xfff0) != 0x3190
|
| 1196 |
|
|
&& (code & 0xfff0) != 0x31a0 && (code & 0xfff0) != 0x31c0
|
| 1197 |
|
|
&& (code & 0xfff0) != 0x31d0 && (code & 0xfff0) != 0x31e0
|
| 1198 |
|
|
/* Or a Co-processor branch ('bcop'). */
|
| 1199 |
|
|
&& (code & 0xfff0) != 0x3010 && (code & 0xfff0) != 0x3110)
|
| 1200 |
|
|
continue;
|
| 1201 |
|
|
|
| 1202 |
|
|
/* Note that we've changed the relocs, section contents, etc. */
|
| 1203 |
|
|
elf_section_data (sec)->relocs = internal_relocs;
|
| 1204 |
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
| 1205 |
|
|
symtab_hdr->contents = (unsigned char *) isymbuf;
|
| 1206 |
|
|
|
| 1207 |
|
|
/* Fix the opcode. */
|
| 1208 |
|
|
bfd_put_8 (abfd, 0x30, contents + irel->r_offset + 1);
|
| 1209 |
|
|
|
| 1210 |
|
|
/* Fix the relocation's type. */
|
| 1211 |
|
|
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
| 1212 |
|
|
R_CRX_REL8_CMP);
|
| 1213 |
|
|
|
| 1214 |
|
|
/* Delete two bytes of data. */
|
| 1215 |
|
|
if (!elf32_crx_relax_delete_bytes (link_info, abfd, sec,
|
| 1216 |
|
|
irel->r_offset + 4, 2))
|
| 1217 |
|
|
goto error_return;
|
| 1218 |
|
|
|
| 1219 |
|
|
/* That will change things, so, we should relax again.
|
| 1220 |
|
|
Note that this is not required, and it may be slow. */
|
| 1221 |
|
|
*again = TRUE;
|
| 1222 |
|
|
}
|
| 1223 |
|
|
}
|
| 1224 |
|
|
|
| 1225 |
|
|
/* Try to turn a 32bit immediate address into
|
| 1226 |
|
|
a 16bit immediate address. */
|
| 1227 |
|
|
if (ELF32_R_TYPE (irel->r_info) == (int) R_CRX_IMM32)
|
| 1228 |
|
|
{
|
| 1229 |
|
|
bfd_vma value = symval;
|
| 1230 |
|
|
|
| 1231 |
|
|
/* See if the value will fit in 16 bits. */
|
| 1232 |
|
|
if ((long) value < 0x7fff && (long) value > -0x8000)
|
| 1233 |
|
|
{
|
| 1234 |
|
|
unsigned short code;
|
| 1235 |
|
|
|
| 1236 |
|
|
/* Get the opcode. */
|
| 1237 |
|
|
code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset);
|
| 1238 |
|
|
|
| 1239 |
|
|
/* Verify it's a 'arithmetic double'. */
|
| 1240 |
|
|
if ((code & 0xf0f0) != 0x20f0)
|
| 1241 |
|
|
continue;
|
| 1242 |
|
|
|
| 1243 |
|
|
/* Note that we've changed the relocs, section contents, etc. */
|
| 1244 |
|
|
elf_section_data (sec)->relocs = internal_relocs;
|
| 1245 |
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
| 1246 |
|
|
symtab_hdr->contents = (unsigned char *) isymbuf;
|
| 1247 |
|
|
|
| 1248 |
|
|
/* Fix the opcode. */
|
| 1249 |
|
|
bfd_put_8 (abfd, (code & 0xff) - 0x10, contents + irel->r_offset);
|
| 1250 |
|
|
|
| 1251 |
|
|
/* Fix the relocation's type. */
|
| 1252 |
|
|
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
| 1253 |
|
|
R_CRX_IMM16);
|
| 1254 |
|
|
|
| 1255 |
|
|
/* Delete two bytes of data. */
|
| 1256 |
|
|
if (!elf32_crx_relax_delete_bytes (link_info, abfd, sec,
|
| 1257 |
|
|
irel->r_offset + 2, 2))
|
| 1258 |
|
|
goto error_return;
|
| 1259 |
|
|
|
| 1260 |
|
|
/* That will change things, so, we should relax again.
|
| 1261 |
|
|
Note that this is not required, and it may be slow. */
|
| 1262 |
|
|
*again = TRUE;
|
| 1263 |
|
|
}
|
| 1264 |
|
|
}
|
| 1265 |
|
|
}
|
| 1266 |
|
|
|
| 1267 |
|
|
if (isymbuf != NULL
|
| 1268 |
|
|
&& symtab_hdr->contents != (unsigned char *) isymbuf)
|
| 1269 |
|
|
{
|
| 1270 |
|
|
if (! link_info->keep_memory)
|
| 1271 |
|
|
free (isymbuf);
|
| 1272 |
|
|
else
|
| 1273 |
|
|
{
|
| 1274 |
|
|
/* Cache the symbols for elf_link_input_bfd. */
|
| 1275 |
|
|
symtab_hdr->contents = (unsigned char *) isymbuf;
|
| 1276 |
|
|
}
|
| 1277 |
|
|
}
|
| 1278 |
|
|
|
| 1279 |
|
|
if (contents != NULL
|
| 1280 |
|
|
&& elf_section_data (sec)->this_hdr.contents != contents)
|
| 1281 |
|
|
{
|
| 1282 |
|
|
if (! link_info->keep_memory)
|
| 1283 |
|
|
free (contents);
|
| 1284 |
|
|
else
|
| 1285 |
|
|
{
|
| 1286 |
|
|
/* Cache the section contents for elf_link_input_bfd. */
|
| 1287 |
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
| 1288 |
|
|
}
|
| 1289 |
|
|
}
|
| 1290 |
|
|
|
| 1291 |
|
|
if (internal_relocs != NULL
|
| 1292 |
|
|
&& elf_section_data (sec)->relocs != internal_relocs)
|
| 1293 |
|
|
free (internal_relocs);
|
| 1294 |
|
|
|
| 1295 |
|
|
return TRUE;
|
| 1296 |
|
|
|
| 1297 |
|
|
error_return:
|
| 1298 |
|
|
if (isymbuf != NULL
|
| 1299 |
|
|
&& symtab_hdr->contents != (unsigned char *) isymbuf)
|
| 1300 |
|
|
free (isymbuf);
|
| 1301 |
|
|
if (contents != NULL
|
| 1302 |
|
|
&& elf_section_data (sec)->this_hdr.contents != contents)
|
| 1303 |
|
|
free (contents);
|
| 1304 |
|
|
if (internal_relocs != NULL
|
| 1305 |
|
|
&& elf_section_data (sec)->relocs != internal_relocs)
|
| 1306 |
|
|
free (internal_relocs);
|
| 1307 |
|
|
|
| 1308 |
|
|
return FALSE;
|
| 1309 |
|
|
}
|
| 1310 |
|
|
|
| 1311 |
|
|
/* Definitions for setting CRX target vector. */
|
| 1312 |
|
|
#define TARGET_LITTLE_SYM bfd_elf32_crx_vec
|
| 1313 |
|
|
#define TARGET_LITTLE_NAME "elf32-crx"
|
| 1314 |
|
|
#define ELF_ARCH bfd_arch_crx
|
| 1315 |
|
|
#define ELF_MACHINE_CODE EM_CRX
|
| 1316 |
|
|
#define ELF_MAXPAGESIZE 0x1
|
| 1317 |
|
|
#define elf_symbol_leading_char '_'
|
| 1318 |
|
|
|
| 1319 |
|
|
#define bfd_elf32_bfd_reloc_type_lookup elf_crx_reloc_type_lookup
|
| 1320 |
|
|
#define bfd_elf32_bfd_reloc_name_lookup \
|
| 1321 |
|
|
elf_crx_reloc_name_lookup
|
| 1322 |
|
|
#define elf_info_to_howto elf_crx_info_to_howto
|
| 1323 |
|
|
#define elf_info_to_howto_rel 0
|
| 1324 |
|
|
#define elf_backend_relocate_section elf32_crx_relocate_section
|
| 1325 |
|
|
#define bfd_elf32_bfd_relax_section elf32_crx_relax_section
|
| 1326 |
|
|
#define bfd_elf32_bfd_get_relocated_section_contents \
|
| 1327 |
|
|
elf32_crx_get_relocated_section_contents
|
| 1328 |
|
|
#define elf_backend_can_gc_sections 1
|
| 1329 |
|
|
#define elf_backend_rela_normal 1
|
| 1330 |
|
|
|
| 1331 |
|
|
#include "elf32-target.h"
|
