| 1 |
14 |
khays |
/* DLX specific support for 32-bit ELF
|
| 2 |
|
|
Copyright 2002, 2003, 2004, 2005, 2006, 2007, 2011
|
| 3 |
|
|
Free Software Foundation, Inc.
|
| 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 "elf/dlx.h"
|
| 27 |
|
|
|
| 28 |
|
|
#define USE_REL 1
|
| 29 |
|
|
|
| 30 |
|
|
#define bfd_elf32_bfd_reloc_type_lookup elf32_dlx_reloc_type_lookup
|
| 31 |
|
|
#define bfd_elf32_bfd_reloc_name_lookup elf32_dlx_reloc_name_lookup
|
| 32 |
|
|
#define elf_info_to_howto elf32_dlx_info_to_howto
|
| 33 |
|
|
#define elf_info_to_howto_rel elf32_dlx_info_to_howto_rel
|
| 34 |
|
|
#define elf_backend_check_relocs elf32_dlx_check_relocs
|
| 35 |
|
|
|
| 36 |
|
|
/* The gas default behavior is not to preform the %hi modifier so that the
|
| 37 |
|
|
GNU assembler can have the lower 16 bits offset placed in the insn, BUT
|
| 38 |
|
|
we do like the gas to indicate it is %hi reloc type so when we in the link
|
| 39 |
|
|
loader phase we can have the corrected hi16 vale replace the buggous lo16
|
| 40 |
|
|
value that was placed there by gas. */
|
| 41 |
|
|
|
| 42 |
|
|
static int skip_dlx_elf_hi16_reloc = 0;
|
| 43 |
|
|
|
| 44 |
|
|
extern int set_dlx_skip_hi16_flag (int);
|
| 45 |
|
|
|
| 46 |
|
|
int
|
| 47 |
|
|
set_dlx_skip_hi16_flag (int flag)
|
| 48 |
|
|
{
|
| 49 |
|
|
skip_dlx_elf_hi16_reloc = flag;
|
| 50 |
|
|
return flag;
|
| 51 |
|
|
}
|
| 52 |
|
|
|
| 53 |
|
|
static bfd_reloc_status_type
|
| 54 |
|
|
_bfd_dlx_elf_hi16_reloc (bfd *abfd,
|
| 55 |
|
|
arelent *reloc_entry,
|
| 56 |
|
|
asymbol *symbol,
|
| 57 |
|
|
void * data,
|
| 58 |
|
|
asection *input_section,
|
| 59 |
|
|
bfd *output_bfd,
|
| 60 |
|
|
char **error_message)
|
| 61 |
|
|
{
|
| 62 |
|
|
bfd_reloc_status_type ret;
|
| 63 |
|
|
bfd_vma relocation;
|
| 64 |
|
|
|
| 65 |
|
|
/* If the skip flag is set then we simply do the generic relocating, this
|
| 66 |
|
|
is more of a hack for dlx gas/gld, so we do not need to do the %hi/%lo
|
| 67 |
|
|
fixup like mips gld did. */
|
| 68 |
|
|
if (skip_dlx_elf_hi16_reloc)
|
| 69 |
|
|
return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
|
| 70 |
|
|
input_section, output_bfd, error_message);
|
| 71 |
|
|
|
| 72 |
|
|
/* If we're relocating, and this an external symbol, we don't want
|
| 73 |
|
|
to change anything. */
|
| 74 |
|
|
if (output_bfd != (bfd *) NULL
|
| 75 |
|
|
&& (symbol->flags & BSF_SECTION_SYM) == 0
|
| 76 |
|
|
&& reloc_entry->addend == 0)
|
| 77 |
|
|
{
|
| 78 |
|
|
reloc_entry->address += input_section->output_offset;
|
| 79 |
|
|
return bfd_reloc_ok;
|
| 80 |
|
|
}
|
| 81 |
|
|
|
| 82 |
|
|
ret = bfd_reloc_ok;
|
| 83 |
|
|
|
| 84 |
|
|
if (bfd_is_und_section (symbol->section)
|
| 85 |
|
|
&& output_bfd == (bfd *) NULL)
|
| 86 |
|
|
ret = bfd_reloc_undefined;
|
| 87 |
|
|
|
| 88 |
|
|
relocation = (bfd_is_com_section (symbol->section)) ? 0 : symbol->value;
|
| 89 |
|
|
relocation += symbol->section->output_section->vma;
|
| 90 |
|
|
relocation += symbol->section->output_offset;
|
| 91 |
|
|
relocation += reloc_entry->addend;
|
| 92 |
|
|
relocation += bfd_get_16 (abfd, (bfd_byte *)data + reloc_entry->address);
|
| 93 |
|
|
|
| 94 |
|
|
if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
|
| 95 |
|
|
return bfd_reloc_outofrange;
|
| 96 |
|
|
|
| 97 |
|
|
bfd_put_16 (abfd, (short)((relocation >> 16) & 0xFFFF),
|
| 98 |
|
|
(bfd_byte *)data + reloc_entry->address);
|
| 99 |
|
|
|
| 100 |
|
|
return ret;
|
| 101 |
|
|
}
|
| 102 |
|
|
|
| 103 |
|
|
/* ELF relocs are against symbols. If we are producing relocatable
|
| 104 |
|
|
output, and the reloc is against an external symbol, and nothing
|
| 105 |
|
|
has given us any additional addend, the resulting reloc will also
|
| 106 |
|
|
be against the same symbol. In such a case, we don't want to
|
| 107 |
|
|
change anything about the way the reloc is handled, since it will
|
| 108 |
|
|
all be done at final link time. Rather than put special case code
|
| 109 |
|
|
into bfd_perform_relocation, all the reloc types use this howto
|
| 110 |
|
|
function. It just short circuits the reloc if producing
|
| 111 |
|
|
relocatable output against an external symbol. */
|
| 112 |
|
|
|
| 113 |
|
|
static bfd_reloc_status_type
|
| 114 |
|
|
elf32_dlx_relocate16 (bfd *abfd,
|
| 115 |
|
|
arelent *reloc_entry,
|
| 116 |
|
|
asymbol *symbol,
|
| 117 |
|
|
void * data,
|
| 118 |
|
|
asection *input_section,
|
| 119 |
|
|
bfd *output_bfd,
|
| 120 |
|
|
char **error_message ATTRIBUTE_UNUSED)
|
| 121 |
|
|
{
|
| 122 |
|
|
unsigned long insn, vallo, allignment;
|
| 123 |
|
|
int val;
|
| 124 |
|
|
|
| 125 |
|
|
/* HACK: I think this first condition is necessary when producing
|
| 126 |
|
|
relocatable output. After the end of HACK, the code is identical
|
| 127 |
|
|
to bfd_elf_generic_reloc(). I would _guess_ the first change
|
| 128 |
|
|
belongs there rather than here. martindo 1998-10-23. */
|
| 129 |
|
|
|
| 130 |
|
|
if (skip_dlx_elf_hi16_reloc)
|
| 131 |
|
|
return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
|
| 132 |
|
|
input_section, output_bfd, error_message);
|
| 133 |
|
|
|
| 134 |
|
|
/* Check undefined section and undefined symbols. */
|
| 135 |
|
|
if (bfd_is_und_section (symbol->section)
|
| 136 |
|
|
&& output_bfd == (bfd *) NULL)
|
| 137 |
|
|
return bfd_reloc_undefined;
|
| 138 |
|
|
|
| 139 |
|
|
/* Can not support a long jump to sections other then .text. */
|
| 140 |
|
|
if (strcmp (input_section->name, symbol->section->output_section->name) != 0)
|
| 141 |
|
|
{
|
| 142 |
|
|
(*_bfd_error_handler) (_("BFD Link Error: branch (PC rel16) to section (%s) not supported"),
|
| 143 |
|
|
symbol->section->output_section->name);
|
| 144 |
|
|
return bfd_reloc_undefined;
|
| 145 |
|
|
}
|
| 146 |
|
|
|
| 147 |
|
|
insn = bfd_get_32 (abfd, (bfd_byte *)data + reloc_entry->address);
|
| 148 |
|
|
allignment = 1 << (input_section->output_section->alignment_power - 1);
|
| 149 |
|
|
vallo = insn & 0x0000FFFF;
|
| 150 |
|
|
|
| 151 |
|
|
if (vallo & 0x8000)
|
| 152 |
|
|
vallo = ~(vallo | 0xFFFF0000) + 1;
|
| 153 |
|
|
|
| 154 |
|
|
/* vallo points to the vma of next instruction. */
|
| 155 |
|
|
vallo += (((unsigned long)(input_section->output_section->vma +
|
| 156 |
|
|
input_section->output_offset) +
|
| 157 |
|
|
allignment) & ~allignment);
|
| 158 |
|
|
|
| 159 |
|
|
/* val is the displacement (PC relative to next instruction). */
|
| 160 |
|
|
val = (symbol->section->output_offset +
|
| 161 |
|
|
symbol->section->output_section->vma +
|
| 162 |
|
|
symbol->value) - vallo;
|
| 163 |
|
|
|
| 164 |
|
|
if (abs ((int) val) > 0x00007FFF)
|
| 165 |
|
|
return bfd_reloc_outofrange;
|
| 166 |
|
|
|
| 167 |
|
|
insn = (insn & 0xFFFF0000) | (val & 0x0000FFFF);
|
| 168 |
|
|
|
| 169 |
|
|
bfd_put_32 (abfd, insn,
|
| 170 |
|
|
(bfd_byte *) data + reloc_entry->address);
|
| 171 |
|
|
|
| 172 |
|
|
return bfd_reloc_ok;
|
| 173 |
|
|
}
|
| 174 |
|
|
|
| 175 |
|
|
static bfd_reloc_status_type
|
| 176 |
|
|
elf32_dlx_relocate26 (bfd *abfd,
|
| 177 |
|
|
arelent *reloc_entry,
|
| 178 |
|
|
asymbol *symbol,
|
| 179 |
|
|
void * data,
|
| 180 |
|
|
asection *input_section,
|
| 181 |
|
|
bfd *output_bfd,
|
| 182 |
|
|
char **error_message ATTRIBUTE_UNUSED)
|
| 183 |
|
|
{
|
| 184 |
|
|
unsigned long insn, vallo, allignment;
|
| 185 |
|
|
int val;
|
| 186 |
|
|
|
| 187 |
|
|
/* HACK: I think this first condition is necessary when producing
|
| 188 |
|
|
relocatable output. After the end of HACK, the code is identical
|
| 189 |
|
|
to bfd_elf_generic_reloc(). I would _guess_ the first change
|
| 190 |
|
|
belongs there rather than here. martindo 1998-10-23. */
|
| 191 |
|
|
|
| 192 |
|
|
if (skip_dlx_elf_hi16_reloc)
|
| 193 |
|
|
return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
|
| 194 |
|
|
input_section, output_bfd, error_message);
|
| 195 |
|
|
|
| 196 |
|
|
/* Check undefined section and undefined symbols. */
|
| 197 |
|
|
if (bfd_is_und_section (symbol->section)
|
| 198 |
|
|
&& output_bfd == (bfd *) NULL)
|
| 199 |
|
|
return bfd_reloc_undefined;
|
| 200 |
|
|
|
| 201 |
|
|
/* Can not support a long jump to sections other then .text */
|
| 202 |
|
|
if (strcmp (input_section->name, symbol->section->output_section->name) != 0)
|
| 203 |
|
|
{
|
| 204 |
|
|
(*_bfd_error_handler) (_("BFD Link Error: jump (PC rel26) to section (%s) not supported"),
|
| 205 |
|
|
symbol->section->output_section->name);
|
| 206 |
|
|
return bfd_reloc_undefined;
|
| 207 |
|
|
}
|
| 208 |
|
|
|
| 209 |
|
|
insn = bfd_get_32 (abfd, (bfd_byte *)data + reloc_entry->address);
|
| 210 |
|
|
allignment = 1 << (input_section->output_section->alignment_power - 1);
|
| 211 |
|
|
vallo = insn & 0x03FFFFFF;
|
| 212 |
|
|
|
| 213 |
|
|
if (vallo & 0x03000000)
|
| 214 |
|
|
vallo = ~(vallo | 0xFC000000) + 1;
|
| 215 |
|
|
|
| 216 |
|
|
/* vallo is the vma for the next instruction. */
|
| 217 |
|
|
vallo += (((unsigned long) (input_section->output_section->vma +
|
| 218 |
|
|
input_section->output_offset) +
|
| 219 |
|
|
allignment) & ~allignment);
|
| 220 |
|
|
|
| 221 |
|
|
/* val is the displacement (PC relative to next instruction). */
|
| 222 |
|
|
val = (symbol->section->output_offset +
|
| 223 |
|
|
symbol->section->output_section->vma + symbol->value)
|
| 224 |
|
|
- vallo;
|
| 225 |
|
|
|
| 226 |
|
|
if (abs ((int) val) > 0x01FFFFFF)
|
| 227 |
|
|
return bfd_reloc_outofrange;
|
| 228 |
|
|
|
| 229 |
|
|
insn = (insn & 0xFC000000) | (val & 0x03FFFFFF);
|
| 230 |
|
|
bfd_put_32 (abfd, insn,
|
| 231 |
|
|
(bfd_byte *) data + reloc_entry->address);
|
| 232 |
|
|
|
| 233 |
|
|
return bfd_reloc_ok;
|
| 234 |
|
|
}
|
| 235 |
|
|
|
| 236 |
|
|
static reloc_howto_type dlx_elf_howto_table[]=
|
| 237 |
|
|
{
|
| 238 |
|
|
/* No relocation. */
|
| 239 |
|
|
HOWTO (R_DLX_NONE, /* Type. */
|
| 240 |
|
|
0, /* Rightshift. */
|
| 241 |
|
|
0, /* size (0 = byte, 1 = short, 2 = long). */
|
| 242 |
|
|
0, /* Bitsize. */
|
| 243 |
|
|
FALSE, /* PC_relative. */
|
| 244 |
|
|
0, /* Bitpos. */
|
| 245 |
|
|
complain_overflow_dont,/* Complain_on_overflow. */
|
| 246 |
|
|
bfd_elf_generic_reloc, /* Special_function. */
|
| 247 |
|
|
"R_DLX_NONE", /* Name. */
|
| 248 |
|
|
FALSE, /* Partial_inplace. */
|
| 249 |
|
|
0, /* Src_mask. */
|
| 250 |
|
|
0, /* Dst_mask. */
|
| 251 |
|
|
FALSE), /* PCrel_offset. */
|
| 252 |
|
|
|
| 253 |
|
|
/* 8 bit relocation. */
|
| 254 |
|
|
HOWTO (R_DLX_RELOC_8, /* Type. */
|
| 255 |
|
|
0, /* Rightshift. */
|
| 256 |
|
|
0, /* Size (0 = byte, 1 = short, 2 = long). */
|
| 257 |
|
|
8, /* Bitsize. */
|
| 258 |
|
|
FALSE, /* PC_relative. */
|
| 259 |
|
|
0, /* Bitpos. */
|
| 260 |
|
|
complain_overflow_dont,/* Complain_on_overflow. */
|
| 261 |
|
|
bfd_elf_generic_reloc, /* Special_function. */
|
| 262 |
|
|
"R_DLX_RELOC_8", /* Name. */
|
| 263 |
|
|
TRUE, /* Partial_inplace. */
|
| 264 |
|
|
0xff, /* Src_mask. */
|
| 265 |
|
|
0xff, /* Dst_mask. */
|
| 266 |
|
|
FALSE), /* PCrel_offset. */
|
| 267 |
|
|
|
| 268 |
|
|
/* 16 bit relocation. */
|
| 269 |
|
|
HOWTO (R_DLX_RELOC_16, /* Type. */
|
| 270 |
|
|
0, /* Rightshift. */
|
| 271 |
|
|
1, /* Size (0 = byte, 1 = short, 2 = long). */
|
| 272 |
|
|
16, /* Bitsize. */
|
| 273 |
|
|
FALSE, /* PC_relative. */
|
| 274 |
|
|
0, /* Bitpos. */
|
| 275 |
|
|
complain_overflow_dont,/* Complain_on_overflow. */
|
| 276 |
|
|
bfd_elf_generic_reloc, /* Special_function. */
|
| 277 |
|
|
"R_DLX_RELOC_16", /* Name. */
|
| 278 |
|
|
TRUE, /* Partial_inplace. */
|
| 279 |
|
|
0xffff, /* Src_mask. */
|
| 280 |
|
|
0xffff, /* Dst_mask. */
|
| 281 |
|
|
FALSE), /* PCrel_offset. */
|
| 282 |
|
|
|
| 283 |
|
|
/* 32 bit relocation. */
|
| 284 |
|
|
HOWTO (R_DLX_RELOC_32, /* Type. */
|
| 285 |
|
|
0, /* Rightshift. */
|
| 286 |
|
|
2, /* Size (0 = byte, 1 = short, 2 = long). */
|
| 287 |
|
|
32, /* Bitsize. */
|
| 288 |
|
|
FALSE, /* PC_relative. */
|
| 289 |
|
|
0, /* Bitpos. */
|
| 290 |
|
|
complain_overflow_dont,/* Complain_on_overflow. */
|
| 291 |
|
|
bfd_elf_generic_reloc, /* Special_function. */
|
| 292 |
|
|
"R_DLX_RELOC_32", /* Name. */
|
| 293 |
|
|
TRUE, /* Partial_inplace. */
|
| 294 |
|
|
0xffffffff, /* Src_mask. */
|
| 295 |
|
|
0xffffffff, /* Dst_mask. */
|
| 296 |
|
|
FALSE), /* PCrel_offset. */
|
| 297 |
|
|
|
| 298 |
|
|
/* GNU extension to record C++ vtable hierarchy. */
|
| 299 |
|
|
HOWTO (R_DLX_GNU_VTINHERIT, /* Type. */
|
| 300 |
|
|
0, /* Rightshift. */
|
| 301 |
|
|
2, /* Size (0 = byte, 1 = short, 2 = long). */
|
| 302 |
|
|
0, /* Bitsize. */
|
| 303 |
|
|
FALSE, /* PC_relative. */
|
| 304 |
|
|
0, /* Bitpos. */
|
| 305 |
|
|
complain_overflow_dont,/* Complain_on_overflow. */
|
| 306 |
|
|
NULL, /* Special_function. */
|
| 307 |
|
|
"R_DLX_GNU_VTINHERIT", /* Name. */
|
| 308 |
|
|
FALSE, /* Partial_inplace. */
|
| 309 |
|
|
0, /* Src_mask. */
|
| 310 |
|
|
0, /* Dst_mask. */
|
| 311 |
|
|
FALSE), /* PCrel_offset. */
|
| 312 |
|
|
|
| 313 |
|
|
/* GNU extension to record C++ vtable member usage. */
|
| 314 |
|
|
HOWTO (R_DLX_GNU_VTENTRY, /* Type. */
|
| 315 |
|
|
0, /* Rightshift. */
|
| 316 |
|
|
2, /* Size (0 = byte, 1 = short, 2 = long). */
|
| 317 |
|
|
0, /* Bitsize. */
|
| 318 |
|
|
FALSE, /* PC_relative. */
|
| 319 |
|
|
0, /* Bitpos. */
|
| 320 |
|
|
complain_overflow_dont,/* Complain_on_overflow. */
|
| 321 |
|
|
_bfd_elf_rel_vtable_reloc_fn,/* Special_function. */
|
| 322 |
|
|
"R_DLX_GNU_VTENTRY", /* Name. */
|
| 323 |
|
|
FALSE, /* Partial_inplace. */
|
| 324 |
|
|
0, /* Src_mask. */
|
| 325 |
|
|
0, /* Dst_mask. */
|
| 326 |
|
|
FALSE) /* PCrel_offset. */
|
| 327 |
|
|
};
|
| 328 |
|
|
|
| 329 |
|
|
/* 16 bit offset for pc-relative branches. */
|
| 330 |
|
|
static reloc_howto_type elf_dlx_gnu_rel16_s2 =
|
| 331 |
|
|
HOWTO (R_DLX_RELOC_16_PCREL, /* Type. */
|
| 332 |
|
|
0, /* Rightshift. */
|
| 333 |
|
|
1, /* Size (0 = byte, 1 = short, 2 = long). */
|
| 334 |
|
|
16, /* Bitsize. */
|
| 335 |
|
|
TRUE, /* PC_relative. */
|
| 336 |
|
|
0, /* Bitpos. */
|
| 337 |
|
|
complain_overflow_signed, /* Complain_on_overflow. */
|
| 338 |
|
|
elf32_dlx_relocate16, /* Special_function. */
|
| 339 |
|
|
"R_DLX_RELOC_16_PCREL",/* Name. */
|
| 340 |
|
|
TRUE, /* Partial_inplace. */
|
| 341 |
|
|
0xffff, /* Src_mask. */
|
| 342 |
|
|
0xffff, /* Dst_mask. */
|
| 343 |
|
|
TRUE); /* PCrel_offset. */
|
| 344 |
|
|
|
| 345 |
|
|
/* 26 bit offset for pc-relative branches. */
|
| 346 |
|
|
static reloc_howto_type elf_dlx_gnu_rel26_s2 =
|
| 347 |
|
|
HOWTO (R_DLX_RELOC_26_PCREL, /* Type. */
|
| 348 |
|
|
0, /* Rightshift. */
|
| 349 |
|
|
2, /* Size (0 = byte, 1 = short, 2 = long). */
|
| 350 |
|
|
26, /* Bitsize. */
|
| 351 |
|
|
TRUE, /* PC_relative. */
|
| 352 |
|
|
0, /* Bitpos. */
|
| 353 |
|
|
complain_overflow_dont,/* Complain_on_overflow. */
|
| 354 |
|
|
elf32_dlx_relocate26, /* Special_function. */
|
| 355 |
|
|
"R_DLX_RELOC_26_PCREL",/* Name. */
|
| 356 |
|
|
TRUE, /* Partial_inplace. */
|
| 357 |
|
|
0xffff, /* Src_mask. */
|
| 358 |
|
|
0xffff, /* Dst_mask. */
|
| 359 |
|
|
TRUE); /* PCrel_offset. */
|
| 360 |
|
|
|
| 361 |
|
|
/* High 16 bits of symbol value. */
|
| 362 |
|
|
static reloc_howto_type elf_dlx_reloc_16_hi =
|
| 363 |
|
|
HOWTO (R_DLX_RELOC_16_HI, /* Type. */
|
| 364 |
|
|
16, /* Rightshift. */
|
| 365 |
|
|
2, /* Size (0 = byte, 1 = short, 2 = long). */
|
| 366 |
|
|
32, /* Bitsize. */
|
| 367 |
|
|
FALSE, /* PC_relative. */
|
| 368 |
|
|
0, /* Bitpos. */
|
| 369 |
|
|
complain_overflow_dont,/* Complain_on_overflow. */
|
| 370 |
|
|
_bfd_dlx_elf_hi16_reloc,/* Special_function. */
|
| 371 |
|
|
"R_DLX_RELOC_16_HI", /* Name. */
|
| 372 |
|
|
TRUE, /* Partial_inplace. */
|
| 373 |
|
|
0xFFFF, /* Src_mask. */
|
| 374 |
|
|
0xffff, /* Dst_mask. */
|
| 375 |
|
|
FALSE); /* PCrel_offset. */
|
| 376 |
|
|
|
| 377 |
|
|
/* Low 16 bits of symbol value. */
|
| 378 |
|
|
static reloc_howto_type elf_dlx_reloc_16_lo =
|
| 379 |
|
|
HOWTO (R_DLX_RELOC_16_LO, /* Type. */
|
| 380 |
|
|
0, /* Rightshift. */
|
| 381 |
|
|
1, /* Size (0 = byte, 1 = short, 2 = long). */
|
| 382 |
|
|
16, /* Bitsize. */
|
| 383 |
|
|
FALSE, /* PC_relative. */
|
| 384 |
|
|
0, /* Bitpos. */
|
| 385 |
|
|
complain_overflow_dont,/* Complain_on_overflow. */
|
| 386 |
|
|
bfd_elf_generic_reloc, /* Special_function. */
|
| 387 |
|
|
"R_DLX_RELOC_16_LO", /* Name. */
|
| 388 |
|
|
TRUE, /* Partial_inplace. */
|
| 389 |
|
|
0xffff, /* Src_mask. */
|
| 390 |
|
|
0xffff, /* Dst_mask. */
|
| 391 |
|
|
FALSE); /* PCrel_offset. */
|
| 392 |
|
|
|
| 393 |
|
|
/* A mapping from BFD reloc types to DLX ELF reloc types.
|
| 394 |
|
|
Stolen from elf32-mips.c.
|
| 395 |
|
|
|
| 396 |
|
|
More about this table - for dlx elf relocation we do not really
|
| 397 |
|
|
need this table, if we have a rtype defined in this table will
|
| 398 |
|
|
caused tc_gen_relocate confused and die on us, but if we remove
|
| 399 |
|
|
this table it will caused more problem, so for now simple solution
|
| 400 |
|
|
is to remove those entries which may cause problem. */
|
| 401 |
|
|
struct elf_reloc_map
|
| 402 |
|
|
{
|
| 403 |
|
|
bfd_reloc_code_real_type bfd_reloc_val;
|
| 404 |
|
|
enum elf_dlx_reloc_type elf_reloc_val;
|
| 405 |
|
|
};
|
| 406 |
|
|
|
| 407 |
|
|
static const struct elf_reloc_map dlx_reloc_map[] =
|
| 408 |
|
|
{
|
| 409 |
|
|
{ BFD_RELOC_NONE, R_DLX_NONE },
|
| 410 |
|
|
{ BFD_RELOC_16, R_DLX_RELOC_16 },
|
| 411 |
|
|
{ BFD_RELOC_32, R_DLX_RELOC_32 },
|
| 412 |
|
|
{ BFD_RELOC_DLX_HI16_S, R_DLX_RELOC_16_HI },
|
| 413 |
|
|
{ BFD_RELOC_DLX_LO16, R_DLX_RELOC_16_LO },
|
| 414 |
|
|
{ BFD_RELOC_VTABLE_INHERIT, R_DLX_GNU_VTINHERIT },
|
| 415 |
|
|
{ BFD_RELOC_VTABLE_ENTRY, R_DLX_GNU_VTENTRY }
|
| 416 |
|
|
};
|
| 417 |
|
|
|
| 418 |
|
|
/* Look through the relocs for a section during the first phase.
|
| 419 |
|
|
Since we don't do .gots or .plts, we just need to consider the
|
| 420 |
|
|
virtual table relocs for gc. */
|
| 421 |
|
|
|
| 422 |
|
|
static bfd_boolean
|
| 423 |
|
|
elf32_dlx_check_relocs (bfd *abfd,
|
| 424 |
|
|
struct bfd_link_info *info,
|
| 425 |
|
|
asection *sec,
|
| 426 |
|
|
const Elf_Internal_Rela *relocs)
|
| 427 |
|
|
{
|
| 428 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
| 429 |
|
|
struct elf_link_hash_entry **sym_hashes;
|
| 430 |
|
|
const Elf_Internal_Rela *rel;
|
| 431 |
|
|
const Elf_Internal_Rela *rel_end;
|
| 432 |
|
|
|
| 433 |
|
|
if (info->relocatable)
|
| 434 |
|
|
return TRUE;
|
| 435 |
|
|
|
| 436 |
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
| 437 |
|
|
sym_hashes = elf_sym_hashes (abfd);
|
| 438 |
|
|
|
| 439 |
|
|
rel_end = relocs + sec->reloc_count;
|
| 440 |
|
|
for (rel = relocs; rel < rel_end; rel++)
|
| 441 |
|
|
{
|
| 442 |
|
|
struct elf_link_hash_entry *h;
|
| 443 |
|
|
unsigned long r_symndx;
|
| 444 |
|
|
|
| 445 |
|
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
| 446 |
|
|
if (r_symndx < symtab_hdr->sh_info)
|
| 447 |
|
|
h = NULL;
|
| 448 |
|
|
else
|
| 449 |
|
|
{
|
| 450 |
|
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
| 451 |
|
|
while (h->root.type == bfd_link_hash_indirect
|
| 452 |
|
|
|| h->root.type == bfd_link_hash_warning)
|
| 453 |
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
| 454 |
|
|
}
|
| 455 |
|
|
|
| 456 |
|
|
switch (ELF32_R_TYPE (rel->r_info))
|
| 457 |
|
|
{
|
| 458 |
|
|
/* This relocation describes the C++ object vtable hierarchy.
|
| 459 |
|
|
Reconstruct it for later use during GC. */
|
| 460 |
|
|
case R_DLX_GNU_VTINHERIT:
|
| 461 |
|
|
if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
|
| 462 |
|
|
return FALSE;
|
| 463 |
|
|
break;
|
| 464 |
|
|
|
| 465 |
|
|
/* This relocation describes which C++ vtable entries are actually
|
| 466 |
|
|
used. Record for later use during GC. */
|
| 467 |
|
|
case R_DLX_GNU_VTENTRY:
|
| 468 |
|
|
BFD_ASSERT (h != NULL);
|
| 469 |
|
|
if (h != NULL
|
| 470 |
|
|
&& !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
|
| 471 |
|
|
return FALSE;
|
| 472 |
|
|
break;
|
| 473 |
|
|
}
|
| 474 |
|
|
}
|
| 475 |
|
|
|
| 476 |
|
|
return TRUE;
|
| 477 |
|
|
}
|
| 478 |
|
|
|
| 479 |
|
|
/* Given a BFD reloc type, return a howto structure. */
|
| 480 |
|
|
|
| 481 |
|
|
static reloc_howto_type *
|
| 482 |
|
|
elf32_dlx_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
|
| 483 |
|
|
bfd_reloc_code_real_type code)
|
| 484 |
|
|
{
|
| 485 |
|
|
unsigned int i;
|
| 486 |
|
|
|
| 487 |
|
|
for (i = 0; i < sizeof (dlx_reloc_map) / sizeof (struct elf_reloc_map); i++)
|
| 488 |
|
|
if (dlx_reloc_map[i].bfd_reloc_val == code)
|
| 489 |
|
|
return &dlx_elf_howto_table[(int) dlx_reloc_map[i].elf_reloc_val];
|
| 490 |
|
|
|
| 491 |
|
|
switch (code)
|
| 492 |
|
|
{
|
| 493 |
|
|
default:
|
| 494 |
|
|
bfd_set_error (bfd_error_bad_value);
|
| 495 |
|
|
return NULL;
|
| 496 |
|
|
case BFD_RELOC_16_PCREL_S2:
|
| 497 |
|
|
return &elf_dlx_gnu_rel16_s2;
|
| 498 |
|
|
case BFD_RELOC_DLX_JMP26:
|
| 499 |
|
|
return &elf_dlx_gnu_rel26_s2;
|
| 500 |
|
|
case BFD_RELOC_HI16_S:
|
| 501 |
|
|
return &elf_dlx_reloc_16_hi;
|
| 502 |
|
|
case BFD_RELOC_LO16:
|
| 503 |
|
|
return &elf_dlx_reloc_16_lo;
|
| 504 |
|
|
}
|
| 505 |
|
|
}
|
| 506 |
|
|
|
| 507 |
|
|
static reloc_howto_type *
|
| 508 |
|
|
elf32_dlx_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
|
| 509 |
|
|
const char *r_name)
|
| 510 |
|
|
{
|
| 511 |
|
|
unsigned int i;
|
| 512 |
|
|
|
| 513 |
|
|
for (i = 0;
|
| 514 |
|
|
i < sizeof (dlx_elf_howto_table) / sizeof (dlx_elf_howto_table[0]);
|
| 515 |
|
|
i++)
|
| 516 |
|
|
if (dlx_elf_howto_table[i].name != NULL
|
| 517 |
|
|
&& strcasecmp (dlx_elf_howto_table[i].name, r_name) == 0)
|
| 518 |
|
|
return &dlx_elf_howto_table[i];
|
| 519 |
|
|
|
| 520 |
|
|
if (strcasecmp (elf_dlx_gnu_rel16_s2.name, r_name) == 0)
|
| 521 |
|
|
return &elf_dlx_gnu_rel16_s2;
|
| 522 |
|
|
if (strcasecmp (elf_dlx_gnu_rel26_s2.name, r_name) == 0)
|
| 523 |
|
|
return &elf_dlx_gnu_rel26_s2;
|
| 524 |
|
|
if (strcasecmp (elf_dlx_reloc_16_hi.name, r_name) == 0)
|
| 525 |
|
|
return &elf_dlx_reloc_16_hi;
|
| 526 |
|
|
if (strcasecmp (elf_dlx_reloc_16_lo.name, r_name) == 0)
|
| 527 |
|
|
return &elf_dlx_reloc_16_lo;
|
| 528 |
|
|
|
| 529 |
|
|
return NULL;
|
| 530 |
|
|
}
|
| 531 |
|
|
|
| 532 |
|
|
static reloc_howto_type *
|
| 533 |
|
|
dlx_rtype_to_howto (unsigned int r_type)
|
| 534 |
|
|
{
|
| 535 |
|
|
switch (r_type)
|
| 536 |
|
|
{
|
| 537 |
|
|
case R_DLX_RELOC_16_PCREL:
|
| 538 |
|
|
return & elf_dlx_gnu_rel16_s2;
|
| 539 |
|
|
case R_DLX_RELOC_26_PCREL:
|
| 540 |
|
|
return & elf_dlx_gnu_rel26_s2;
|
| 541 |
|
|
case R_DLX_RELOC_16_HI:
|
| 542 |
|
|
return & elf_dlx_reloc_16_hi;
|
| 543 |
|
|
case R_DLX_RELOC_16_LO:
|
| 544 |
|
|
return & elf_dlx_reloc_16_lo;
|
| 545 |
|
|
default:
|
| 546 |
|
|
BFD_ASSERT (r_type < (unsigned int) R_DLX_max);
|
| 547 |
|
|
return & dlx_elf_howto_table[r_type];
|
| 548 |
|
|
}
|
| 549 |
|
|
}
|
| 550 |
|
|
|
| 551 |
|
|
static void
|
| 552 |
|
|
elf32_dlx_info_to_howto (bfd * abfd ATTRIBUTE_UNUSED,
|
| 553 |
|
|
arelent * cache_ptr ATTRIBUTE_UNUSED,
|
| 554 |
|
|
Elf_Internal_Rela * dst ATTRIBUTE_UNUSED)
|
| 555 |
|
|
{
|
| 556 |
|
|
abort ();
|
| 557 |
|
|
}
|
| 558 |
|
|
|
| 559 |
|
|
static void
|
| 560 |
|
|
elf32_dlx_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
|
| 561 |
|
|
arelent *cache_ptr,
|
| 562 |
|
|
Elf_Internal_Rela *dst)
|
| 563 |
|
|
{
|
| 564 |
|
|
unsigned int r_type;
|
| 565 |
|
|
|
| 566 |
|
|
r_type = ELF32_R_TYPE (dst->r_info);
|
| 567 |
|
|
cache_ptr->howto = dlx_rtype_to_howto (r_type);
|
| 568 |
|
|
return;
|
| 569 |
|
|
}
|
| 570 |
|
|
|
| 571 |
|
|
#define TARGET_BIG_SYM bfd_elf32_dlx_big_vec
|
| 572 |
|
|
#define TARGET_BIG_NAME "elf32-dlx"
|
| 573 |
|
|
#define ELF_ARCH bfd_arch_dlx
|
| 574 |
|
|
#define ELF_MACHINE_CODE EM_DLX
|
| 575 |
|
|
#define ELF_MAXPAGESIZE 1 /* FIXME: This number is wrong, It should be the page size in bytes. */
|
| 576 |
|
|
|
| 577 |
|
|
#include "elf32-target.h"
|
