3057 lines
96 KiB
C
3057 lines
96 KiB
C
/* Xilinx MicroBlaze-specific support for 32-bit ELF
|
||
|
||
Copyright 2009 Free Software Foundation, Inc.
|
||
|
||
This file is part of BFD, the Binary File Descriptor library.
|
||
|
||
This program is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 3 of the License, or
|
||
(at your option) any later version.
|
||
|
||
This program is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with this program; if not, write to the
|
||
Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
|
||
Boston, MA 02110-1301, USA. */
|
||
|
||
|
||
int dbg = 0;
|
||
|
||
#include "bfd.h"
|
||
#include "sysdep.h"
|
||
#include "bfdlink.h"
|
||
#include "libbfd.h"
|
||
#include "elf-bfd.h"
|
||
#include "elf/microblaze.h"
|
||
#include <assert.h>
|
||
|
||
#define USE_RELA /* Only USE_REL is actually significant, but this is
|
||
here are a reminder... */
|
||
#define INST_WORD_SIZE 4
|
||
|
||
static int ro_small_data_pointer = 0;
|
||
static int rw_small_data_pointer = 0;
|
||
|
||
static reloc_howto_type * microblaze_elf_howto_table [(int) R_MICROBLAZE_max];
|
||
|
||
static reloc_howto_type microblaze_elf_howto_raw[] =
|
||
{
|
||
/* This reloc does nothing. */
|
||
HOWTO (R_MICROBLAZE_NONE, /* Type. */
|
||
0, /* Rightshift. */
|
||
2, /* Size (0 = byte, 1 = short, 2 = long). */
|
||
32, /* Bitsize. */
|
||
FALSE, /* PC_relative. */
|
||
0, /* Bitpos. */
|
||
complain_overflow_bitfield, /* Complain on overflow. */
|
||
NULL, /* Special Function. */
|
||
"R_MICROBLAZE_NONE", /* Name. */
|
||
FALSE, /* Partial Inplace. */
|
||
0, /* Source Mask. */
|
||
0, /* Dest Mask. */
|
||
FALSE), /* PC relative offset? */
|
||
|
||
/* A standard 32 bit relocation. */
|
||
HOWTO (R_MICROBLAZE_32, /* Type. */
|
||
0, /* Rightshift. */
|
||
2, /* Size (0 = byte, 1 = short, 2 = long). */
|
||
32, /* Bitsize. */
|
||
FALSE, /* PC_relative. */
|
||
0, /* Bitpos. */
|
||
complain_overflow_bitfield, /* Complain on overflow. */
|
||
bfd_elf_generic_reloc,/* Special Function. */
|
||
"R_MICROBLAZE_32", /* Name. */
|
||
FALSE, /* Partial Inplace. */
|
||
0, /* Source Mask. */
|
||
0xffffffff, /* Dest Mask. */
|
||
FALSE), /* PC relative offset? */
|
||
|
||
/* A standard PCREL 32 bit relocation. */
|
||
HOWTO (R_MICROBLAZE_32_PCREL,/* Type. */
|
||
0, /* Rightshift. */
|
||
2, /* Size (0 = byte, 1 = short, 2 = long). */
|
||
32, /* Bitsize. */
|
||
TRUE, /* PC_relative. */
|
||
0, /* Bitpos. */
|
||
complain_overflow_bitfield, /* Complain on overflow. */
|
||
bfd_elf_generic_reloc,/* Special Function. */
|
||
"R_MICROBLAZE_32_PCREL", /* Name. */
|
||
TRUE, /* Partial Inplace. */
|
||
0, /* Source Mask. */
|
||
0xffffffff, /* Dest Mask. */
|
||
TRUE), /* PC relative offset? */
|
||
|
||
/* A 64 bit PCREL relocation. Table-entry not really used. */
|
||
HOWTO (R_MICROBLAZE_64_PCREL,/* Type. */
|
||
0, /* Rightshift. */
|
||
2, /* Size (0 = byte, 1 = short, 2 = long). */
|
||
16, /* Bitsize. */
|
||
TRUE, /* PC_relative. */
|
||
0, /* Bitpos. */
|
||
complain_overflow_dont, /* Complain on overflow. */
|
||
bfd_elf_generic_reloc,/* Special Function. */
|
||
"R_MICROBLAZE_64_PCREL", /* Name. */
|
||
FALSE, /* Partial Inplace. */
|
||
0, /* Source Mask. */
|
||
0x0000ffff, /* Dest Mask. */
|
||
TRUE), /* PC relative offset? */
|
||
|
||
/* The low half of a PCREL 32 bit relocation. */
|
||
HOWTO (R_MICROBLAZE_32_PCREL_LO, /* Type. */
|
||
0, /* Rightshift. */
|
||
2, /* Size (0 = byte, 1 = short, 2 = long). */
|
||
16, /* Bitsize. */
|
||
TRUE, /* PC_relative. */
|
||
0, /* Bitpos. */
|
||
complain_overflow_signed, /* Complain on overflow. */
|
||
bfd_elf_generic_reloc, /* Special Function. */
|
||
"R_MICROBLAZE_32_PCREL_LO", /* Name. */
|
||
FALSE, /* Partial Inplace. */
|
||
0, /* Source Mask. */
|
||
0x0000ffff, /* Dest Mask. */
|
||
TRUE), /* PC relative offset? */
|
||
|
||
/* A 64 bit relocation. Table entry not really used. */
|
||
HOWTO (R_MICROBLAZE_64, /* Type. */
|
||
0, /* Rightshift. */
|
||
2, /* Size (0 = byte, 1 = short, 2 = long). */
|
||
16, /* Bitsize. */
|
||
FALSE, /* PC_relative. */
|
||
0, /* Bitpos. */
|
||
complain_overflow_dont, /* Complain on overflow. */
|
||
bfd_elf_generic_reloc,/* Special Function. */
|
||
"R_MICROBLAZE_64", /* Name. */
|
||
FALSE, /* Partial Inplace. */
|
||
0, /* Source Mask. */
|
||
0x0000ffff, /* Dest Mask. */
|
||
FALSE), /* PC relative offset? */
|
||
|
||
/* The low half of a 32 bit relocation. */
|
||
HOWTO (R_MICROBLAZE_32_LO, /* Type. */
|
||
0, /* Rightshift. */
|
||
2, /* Size (0 = byte, 1 = short, 2 = long). */
|
||
16, /* Bitsize. */
|
||
FALSE, /* PC_relative. */
|
||
0, /* Bitpos. */
|
||
complain_overflow_signed, /* Complain on overflow. */
|
||
bfd_elf_generic_reloc,/* Special Function. */
|
||
"R_MICROBLAZE_32_LO", /* Name. */
|
||
FALSE, /* Partial Inplace. */
|
||
0, /* Source Mask. */
|
||
0x0000ffff, /* Dest Mask. */
|
||
FALSE), /* PC relative offset? */
|
||
|
||
/* Read-only small data section relocation. */
|
||
HOWTO (R_MICROBLAZE_SRO32, /* Type. */
|
||
0, /* Rightshift. */
|
||
2, /* Size (0 = byte, 1 = short, 2 = long). */
|
||
16, /* Bitsize. */
|
||
FALSE, /* PC_relative. */
|
||
0, /* Bitpos. */
|
||
complain_overflow_bitfield, /* Complain on overflow. */
|
||
bfd_elf_generic_reloc,/* Special Function. */
|
||
"R_MICROBLAZE_SRO32", /* Name. */
|
||
FALSE, /* Partial Inplace. */
|
||
0, /* Source Mask. */
|
||
0x0000ffff, /* Dest Mask. */
|
||
FALSE), /* PC relative offset? */
|
||
|
||
/* Read-write small data area relocation. */
|
||
HOWTO (R_MICROBLAZE_SRW32, /* Type. */
|
||
0, /* Rightshift. */
|
||
2, /* Size (0 = byte, 1 = short, 2 = long). */
|
||
16, /* Bitsize. */
|
||
FALSE, /* PC_relative. */
|
||
0, /* Bitpos. */
|
||
complain_overflow_bitfield, /* Complain on overflow. */
|
||
bfd_elf_generic_reloc,/* Special Function. */
|
||
"R_MICROBLAZE_SRW32", /* Name. */
|
||
FALSE, /* Partial Inplace. */
|
||
0, /* Source Mask. */
|
||
0x0000ffff, /* Dest Mask. */
|
||
FALSE), /* PC relative offset? */
|
||
|
||
/* This reloc does nothing. Used for relaxation. */
|
||
HOWTO (R_MICROBLAZE_64_NONE, /* Type. */
|
||
0, /* Rightshift. */
|
||
2, /* Size (0 = byte, 1 = short, 2 = long). */
|
||
32, /* Bitsize. */
|
||
TRUE, /* PC_relative. */
|
||
0, /* Bitpos. */
|
||
complain_overflow_bitfield, /* Complain on overflow. */
|
||
NULL, /* Special Function. */
|
||
"R_MICROBLAZE_64_NONE",/* Name. */
|
||
FALSE, /* Partial Inplace. */
|
||
0, /* Source Mask. */
|
||
0, /* Dest Mask. */
|
||
FALSE), /* PC relative offset? */
|
||
|
||
/* Symbol Op Symbol relocation. */
|
||
HOWTO (R_MICROBLAZE_32_SYM_OP_SYM, /* Type. */
|
||
0, /* Rightshift. */
|
||
2, /* Size (0 = byte, 1 = short, 2 = long). */
|
||
32, /* Bitsize. */
|
||
FALSE, /* PC_relative. */
|
||
0, /* Bitpos. */
|
||
complain_overflow_bitfield, /* Complain on overflow. */
|
||
bfd_elf_generic_reloc,/* Special Function. */
|
||
"R_MICROBLAZE_32_SYM_OP_SYM", /* Name. */
|
||
FALSE, /* Partial Inplace. */
|
||
0, /* Source Mask. */
|
||
0xffffffff, /* Dest Mask. */
|
||
FALSE), /* PC relative offset? */
|
||
|
||
/* GNU extension to record C++ vtable hierarchy. */
|
||
HOWTO (R_MICROBLAZE_GNU_VTINHERIT, /* Type. */
|
||
0, /* Rightshift. */
|
||
2, /* Size (0 = byte, 1 = short, 2 = long). */
|
||
0, /* Bitsize. */
|
||
FALSE, /* PC_relative. */
|
||
0, /* Bitpos. */
|
||
complain_overflow_dont,/* Complain on overflow. */
|
||
NULL, /* Special Function. */
|
||
"R_MICROBLAZE_GNU_VTINHERIT", /* Name. */
|
||
FALSE, /* Partial Inplace. */
|
||
0, /* Source Mask. */
|
||
0, /* Dest Mask. */
|
||
FALSE), /* PC relative offset? */
|
||
|
||
/* GNU extension to record C++ vtable member usage. */
|
||
HOWTO (R_MICROBLAZE_GNU_VTENTRY, /* Type. */
|
||
0, /* Rightshift. */
|
||
2, /* Size (0 = byte, 1 = short, 2 = long). */
|
||
0, /* Bitsize. */
|
||
FALSE, /* PC_relative. */
|
||
0, /* Bitpos. */
|
||
complain_overflow_dont,/* Complain on overflow. */
|
||
_bfd_elf_rel_vtable_reloc_fn, /* Special Function. */
|
||
"R_MICROBLAZE_GNU_VTENTRY", /* Name. */
|
||
FALSE, /* Partial Inplace. */
|
||
0, /* Source Mask. */
|
||
0, /* Dest Mask. */
|
||
FALSE), /* PC relative offset? */
|
||
|
||
/* A 64 bit GOTPC relocation. Table-entry not really used. */
|
||
HOWTO (R_MICROBLAZE_GOTPC_64, /* Type. */
|
||
0, /* Rightshift. */
|
||
2, /* Size (0 = byte, 1 = short, 2 = long). */
|
||
16, /* Bitsize. */
|
||
TRUE, /* PC_relative. */
|
||
0, /* Bitpos. */
|
||
complain_overflow_dont, /* Complain on overflow. */
|
||
bfd_elf_generic_reloc, /* Special Function. */
|
||
"R_MICROBLAZE_GOTPC_64", /* Name. */
|
||
FALSE, /* Partial Inplace. */
|
||
0, /* Source Mask. */
|
||
0x0000ffff, /* Dest Mask. */
|
||
TRUE), /* PC relative offset? */
|
||
|
||
/* A 64 bit GOT relocation. Table-entry not really used. */
|
||
HOWTO (R_MICROBLAZE_GOT_64, /* Type. */
|
||
0, /* Rightshift. */
|
||
2, /* Size (0 = byte, 1 = short, 2 = long). */
|
||
16, /* Bitsize. */
|
||
FALSE, /* PC_relative. */
|
||
0, /* Bitpos. */
|
||
complain_overflow_dont, /* Complain on overflow. */
|
||
bfd_elf_generic_reloc,/* Special Function. */
|
||
"R_MICROBLAZE_GOT_64",/* Name. */
|
||
FALSE, /* Partial Inplace. */
|
||
0, /* Source Mask. */
|
||
0x0000ffff, /* Dest Mask. */
|
||
FALSE), /* PC relative offset? */
|
||
|
||
/* A 64 bit PLT relocation. Table-entry not really used. */
|
||
HOWTO (R_MICROBLAZE_PLT_64, /* Type. */
|
||
0, /* Rightshift. */
|
||
2, /* Size (0 = byte, 1 = short, 2 = long). */
|
||
16, /* Bitsize. */
|
||
TRUE, /* PC_relative. */
|
||
0, /* Bitpos. */
|
||
complain_overflow_dont, /* Complain on overflow. */
|
||
bfd_elf_generic_reloc,/* Special Function. */
|
||
"R_MICROBLAZE_PLT_64",/* Name. */
|
||
FALSE, /* Partial Inplace. */
|
||
0, /* Source Mask. */
|
||
0x0000ffff, /* Dest Mask. */
|
||
TRUE), /* PC relative offset? */
|
||
|
||
/* Table-entry not really used. */
|
||
HOWTO (R_MICROBLAZE_REL, /* Type. */
|
||
0, /* Rightshift. */
|
||
2, /* Size (0 = byte, 1 = short, 2 = long). */
|
||
16, /* Bitsize. */
|
||
TRUE, /* PC_relative. */
|
||
0, /* Bitpos. */
|
||
complain_overflow_dont, /* Complain on overflow. */
|
||
bfd_elf_generic_reloc,/* Special Function. */
|
||
"R_MICROBLAZE_REL", /* Name. */
|
||
FALSE, /* Partial Inplace. */
|
||
0, /* Source Mask. */
|
||
0x0000ffff, /* Dest Mask. */
|
||
TRUE), /* PC relative offset? */
|
||
|
||
/* Table-entry not really used. */
|
||
HOWTO (R_MICROBLAZE_JUMP_SLOT,/* Type. */
|
||
0, /* Rightshift. */
|
||
2, /* Size (0 = byte, 1 = short, 2 = long). */
|
||
16, /* Bitsize. */
|
||
TRUE, /* PC_relative. */
|
||
0, /* Bitpos. */
|
||
complain_overflow_dont, /* Complain on overflow. */
|
||
bfd_elf_generic_reloc,/* Special Function. */
|
||
"R_MICROBLAZE_JUMP_SLOT", /* Name. */
|
||
FALSE, /* Partial Inplace. */
|
||
0, /* Source Mask. */
|
||
0x0000ffff, /* Dest Mask. */
|
||
TRUE), /* PC relative offset? */
|
||
|
||
/* Table-entry not really used. */
|
||
HOWTO (R_MICROBLAZE_GLOB_DAT,/* Type. */
|
||
0, /* Rightshift. */
|
||
2, /* Size (0 = byte, 1 = short, 2 = long). */
|
||
16, /* Bitsize. */
|
||
TRUE, /* PC_relative. */
|
||
0, /* Bitpos. */
|
||
complain_overflow_dont, /* Complain on overflow. */
|
||
bfd_elf_generic_reloc,/* Special Function. */
|
||
"R_MICROBLAZE_GLOB_DAT", /* Name. */
|
||
FALSE, /* Partial Inplace. */
|
||
0, /* Source Mask. */
|
||
0x0000ffff, /* Dest Mask. */
|
||
TRUE), /* PC relative offset? */
|
||
|
||
/* A 64 bit GOT relative relocation. Table-entry not really used. */
|
||
HOWTO (R_MICROBLAZE_GOTOFF_64, /* Type. */
|
||
0, /* Rightshift. */
|
||
2, /* Size (0 = byte, 1 = short, 2 = long). */
|
||
16, /* Bitsize. */
|
||
FALSE, /* PC_relative. */
|
||
0, /* Bitpos. */
|
||
complain_overflow_dont, /* Complain on overflow. */
|
||
bfd_elf_generic_reloc,/* Special Function. */
|
||
"R_MICROBLAZE_GOTOFF_64", /* Name. */
|
||
FALSE, /* Partial Inplace. */
|
||
0, /* Source Mask. */
|
||
0x0000ffff, /* Dest Mask. */
|
||
FALSE), /* PC relative offset? */
|
||
|
||
/* A 32 bit GOT relative relocation. Table-entry not really used. */
|
||
HOWTO (R_MICROBLAZE_GOTOFF_32, /* Type. */
|
||
0, /* Rightshift. */
|
||
2, /* Size (0 = byte, 1 = short, 2 = long). */
|
||
16, /* Bitsize. */
|
||
FALSE, /* PC_relative. */
|
||
0, /* Bitpos. */
|
||
complain_overflow_dont, /* Complain on overflow. */
|
||
bfd_elf_generic_reloc, /* Special Function. */
|
||
"R_MICROBLAZE_GOTOFF_32", /* Name. */
|
||
FALSE, /* Partial Inplace. */
|
||
0, /* Source Mask. */
|
||
0x0000ffff, /* Dest Mask. */
|
||
FALSE), /* PC relative offset? */
|
||
|
||
/* COPY relocation. Table-entry not really used. */
|
||
HOWTO (R_MICROBLAZE_COPY, /* Type. */
|
||
0, /* Rightshift. */
|
||
2, /* Size (0 = byte, 1 = short, 2 = long). */
|
||
16, /* Bitsize. */
|
||
FALSE, /* PC_relative. */
|
||
0, /* Bitpos. */
|
||
complain_overflow_dont, /* Complain on overflow. */
|
||
bfd_elf_generic_reloc,/* Special Function. */
|
||
"R_MICROBLAZE_COPY", /* Name. */
|
||
FALSE, /* Partial Inplace. */
|
||
0, /* Source Mask. */
|
||
0x0000ffff, /* Dest Mask. */
|
||
FALSE), /* PC relative offset? */
|
||
};
|
||
|
||
#ifndef NUM_ELEM
|
||
#define NUM_ELEM(a) (sizeof (a) / sizeof (a)[0])
|
||
#endif
|
||
|
||
/* Initialize the microblaze_elf_howto_table, so that linear accesses can be done. */
|
||
|
||
static void
|
||
microblaze_elf_howto_init (void)
|
||
{
|
||
unsigned int i;
|
||
|
||
for (i = NUM_ELEM (microblaze_elf_howto_raw); i--;)
|
||
{
|
||
unsigned int type;
|
||
|
||
type = microblaze_elf_howto_raw[i].type;
|
||
|
||
BFD_ASSERT (type < NUM_ELEM (microblaze_elf_howto_table));
|
||
|
||
microblaze_elf_howto_table [type] = & microblaze_elf_howto_raw [i];
|
||
}
|
||
}
|
||
|
||
static reloc_howto_type *
|
||
microblaze_elf_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
|
||
bfd_reloc_code_real_type code)
|
||
{
|
||
enum elf_microblaze_reloc_type microblaze_reloc = R_MICROBLAZE_NONE;
|
||
|
||
switch (code)
|
||
{
|
||
case BFD_RELOC_NONE:
|
||
microblaze_reloc = R_MICROBLAZE_NONE;
|
||
break;
|
||
case BFD_RELOC_MICROBLAZE_64_NONE:
|
||
microblaze_reloc = R_MICROBLAZE_64_NONE;
|
||
break;
|
||
case BFD_RELOC_32:
|
||
microblaze_reloc = R_MICROBLAZE_32;
|
||
break;
|
||
/* RVA is treated the same as 32 */
|
||
case BFD_RELOC_RVA:
|
||
microblaze_reloc = R_MICROBLAZE_32;
|
||
break;
|
||
case BFD_RELOC_32_PCREL:
|
||
microblaze_reloc = R_MICROBLAZE_32_PCREL;
|
||
break;
|
||
case BFD_RELOC_64_PCREL:
|
||
microblaze_reloc = R_MICROBLAZE_64_PCREL;
|
||
break;
|
||
case BFD_RELOC_MICROBLAZE_32_LO_PCREL:
|
||
microblaze_reloc = R_MICROBLAZE_32_PCREL_LO;
|
||
break;
|
||
case BFD_RELOC_64:
|
||
microblaze_reloc = R_MICROBLAZE_64;
|
||
break;
|
||
case BFD_RELOC_MICROBLAZE_32_LO:
|
||
microblaze_reloc = R_MICROBLAZE_32_LO;
|
||
break;
|
||
case BFD_RELOC_MICROBLAZE_32_ROSDA:
|
||
microblaze_reloc = R_MICROBLAZE_SRO32;
|
||
break;
|
||
case BFD_RELOC_MICROBLAZE_32_RWSDA:
|
||
microblaze_reloc = R_MICROBLAZE_SRW32;
|
||
break;
|
||
case BFD_RELOC_MICROBLAZE_32_SYM_OP_SYM:
|
||
microblaze_reloc = R_MICROBLAZE_32_SYM_OP_SYM;
|
||
break;
|
||
case BFD_RELOC_VTABLE_INHERIT:
|
||
microblaze_reloc = R_MICROBLAZE_GNU_VTINHERIT;
|
||
break;
|
||
case BFD_RELOC_VTABLE_ENTRY:
|
||
microblaze_reloc = R_MICROBLAZE_GNU_VTENTRY;
|
||
break;
|
||
case BFD_RELOC_MICROBLAZE_64_GOTPC:
|
||
microblaze_reloc = R_MICROBLAZE_GOTPC_64;
|
||
break;
|
||
case BFD_RELOC_MICROBLAZE_64_GOT:
|
||
microblaze_reloc = R_MICROBLAZE_GOT_64;
|
||
break;
|
||
case BFD_RELOC_MICROBLAZE_64_PLT:
|
||
microblaze_reloc = R_MICROBLAZE_PLT_64;
|
||
break;
|
||
case BFD_RELOC_MICROBLAZE_64_GOTOFF:
|
||
microblaze_reloc = R_MICROBLAZE_GOTOFF_64;
|
||
break;
|
||
case BFD_RELOC_MICROBLAZE_32_GOTOFF:
|
||
microblaze_reloc = R_MICROBLAZE_GOTOFF_32;
|
||
break;
|
||
case BFD_RELOC_MICROBLAZE_COPY:
|
||
microblaze_reloc = R_MICROBLAZE_COPY;
|
||
break;
|
||
default:
|
||
return (reloc_howto_type *) NULL;
|
||
}
|
||
|
||
if (!microblaze_elf_howto_table [R_MICROBLAZE_32])
|
||
/* Initialize howto table if needed. */
|
||
microblaze_elf_howto_init ();
|
||
|
||
return microblaze_elf_howto_table [(int) microblaze_reloc];
|
||
};
|
||
|
||
static reloc_howto_type *
|
||
microblaze_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
|
||
const char *r_name)
|
||
{
|
||
unsigned int i;
|
||
|
||
for (i = 0; i < NUM_ELEM (microblaze_elf_howto_raw); i++)
|
||
if (microblaze_elf_howto_raw[i].name != NULL
|
||
&& strcasecmp (microblaze_elf_howto_raw[i].name, r_name) == 0)
|
||
return µblaze_elf_howto_raw[i];
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* Set the howto pointer for a RCE ELF reloc. */
|
||
|
||
static void
|
||
microblaze_elf_info_to_howto (bfd * abfd ATTRIBUTE_UNUSED,
|
||
arelent * cache_ptr,
|
||
Elf_Internal_Rela * dst)
|
||
{
|
||
if (!microblaze_elf_howto_table [R_MICROBLAZE_32])
|
||
/* Initialize howto table if needed. */
|
||
microblaze_elf_howto_init ();
|
||
|
||
BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_MICROBLAZE_max);
|
||
|
||
cache_ptr->howto = microblaze_elf_howto_table [ELF32_R_TYPE (dst->r_info)];
|
||
}
|
||
|
||
/* Microblaze ELF local labels start with 'L.' or '$L', not '.L'. */
|
||
|
||
static bfd_boolean
|
||
microblaze_elf_is_local_label_name (bfd *abfd, const char *name)
|
||
{
|
||
if (name[0] == 'L' && name[1] == '.')
|
||
return TRUE;
|
||
|
||
if (name[0] == '$' && name[1] == 'L')
|
||
return TRUE;
|
||
|
||
/* With gcc, the labels go back to starting with '.', so we accept
|
||
the generic ELF local label syntax as well. */
|
||
return _bfd_elf_is_local_label_name (abfd, name);
|
||
}
|
||
|
||
/* The microblaze linker (like many others) needs to keep track of
|
||
the number of relocs that it decides to copy as dynamic relocs in
|
||
check_relocs for each symbol. This is so that it can later discard
|
||
them if they are found to be unnecessary. We store the information
|
||
in a field extending the regular ELF linker hash table. */
|
||
|
||
struct elf32_mb_dyn_relocs
|
||
{
|
||
struct elf32_mb_dyn_relocs *next;
|
||
|
||
/* The input section of the reloc. */
|
||
asection *sec;
|
||
|
||
/* Total number of relocs copied for the input section. */
|
||
bfd_size_type count;
|
||
|
||
/* Number of pc-relative relocs copied for the input section. */
|
||
bfd_size_type pc_count;
|
||
};
|
||
|
||
/* ELF linker hash entry. */
|
||
|
||
struct elf32_mb_link_hash_entry
|
||
{
|
||
struct elf_link_hash_entry elf;
|
||
|
||
/* Track dynamic relocs copied for this symbol. */
|
||
struct elf32_mb_dyn_relocs *dyn_relocs;
|
||
|
||
};
|
||
|
||
#define elf32_mb_hash_entry(ent) ((struct elf32_mb_link_hash_entry *)(ent))
|
||
|
||
/* ELF linker hash table. */
|
||
|
||
struct elf32_mb_link_hash_table
|
||
{
|
||
struct elf_link_hash_table elf;
|
||
|
||
/* Short-cuts to get to dynamic linker sections. */
|
||
asection *sgot;
|
||
asection *sgotplt;
|
||
asection *srelgot;
|
||
asection *splt;
|
||
asection *srelplt;
|
||
asection *sdynbss;
|
||
asection *srelbss;
|
||
|
||
/* Small local sym to section mapping cache. */
|
||
struct sym_cache sym_sec;
|
||
};
|
||
|
||
/* Get the ELF linker hash table from a link_info structure. */
|
||
|
||
#define elf32_mb_hash_table(p) \
|
||
((struct elf32_mb_link_hash_table *) ((p)->hash))
|
||
|
||
/* Create an entry in a microblaze ELF linker hash table. */
|
||
|
||
static struct bfd_hash_entry *
|
||
link_hash_newfunc (struct bfd_hash_entry *entry,
|
||
struct bfd_hash_table *table,
|
||
const char *string)
|
||
{
|
||
/* Allocate the structure if it has not already been allocated by a
|
||
subclass. */
|
||
if (entry == NULL)
|
||
{
|
||
entry = bfd_hash_allocate (table,
|
||
sizeof (struct elf32_mb_link_hash_entry));
|
||
if (entry == NULL)
|
||
return entry;
|
||
}
|
||
|
||
/* Call the allocation method of the superclass. */
|
||
entry = _bfd_elf_link_hash_newfunc (entry, table, string);
|
||
if (entry != NULL)
|
||
{
|
||
struct elf32_mb_link_hash_entry *eh;
|
||
|
||
eh = (struct elf32_mb_link_hash_entry *) entry;
|
||
eh->dyn_relocs = NULL;
|
||
}
|
||
|
||
return entry;
|
||
}
|
||
|
||
/* Create a mb ELF linker hash table. */
|
||
|
||
static struct bfd_link_hash_table *
|
||
microblaze_elf_link_hash_table_create (bfd *abfd)
|
||
{
|
||
struct elf32_mb_link_hash_table *ret;
|
||
bfd_size_type amt = sizeof (struct elf32_mb_link_hash_table);
|
||
|
||
ret = (struct elf32_mb_link_hash_table *) bfd_zmalloc (amt);
|
||
if (ret == NULL)
|
||
return NULL;
|
||
|
||
if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
|
||
sizeof (struct elf32_mb_link_hash_entry)))
|
||
{
|
||
free (ret);
|
||
return NULL;
|
||
}
|
||
|
||
return &ret->elf.root;
|
||
}
|
||
|
||
/* Set the values of the small data pointers. */
|
||
|
||
static void
|
||
microblaze_elf_final_sdp (struct bfd_link_info *info)
|
||
{
|
||
struct bfd_link_hash_entry *h;
|
||
|
||
h = bfd_link_hash_lookup (info->hash, RO_SDA_ANCHOR_NAME, FALSE, FALSE, TRUE);
|
||
if (h != (struct bfd_link_hash_entry *) NULL
|
||
&& h->type == bfd_link_hash_defined)
|
||
ro_small_data_pointer = (h->u.def.value
|
||
+ h->u.def.section->output_section->vma
|
||
+ h->u.def.section->output_offset);
|
||
|
||
h = bfd_link_hash_lookup (info->hash, RW_SDA_ANCHOR_NAME, FALSE, FALSE, TRUE);
|
||
if (h != (struct bfd_link_hash_entry *) NULL
|
||
&& h->type == bfd_link_hash_defined)
|
||
rw_small_data_pointer = (h->u.def.value
|
||
+ h->u.def.section->output_section->vma
|
||
+ h->u.def.section->output_offset);
|
||
}
|
||
|
||
/* This code is taken from elf32-m32r.c
|
||
There is some attempt to make this function usable for many architectures,
|
||
both USE_REL and USE_RELA ['twould be nice if such a critter existed],
|
||
if only to serve as a learning tool.
|
||
|
||
The RELOCATE_SECTION function is called by the new ELF backend linker
|
||
to handle the relocations for a section.
|
||
|
||
The relocs are always passed as Rela structures; if the section
|
||
actually uses Rel structures, the r_addend field will always be
|
||
zero.
|
||
|
||
This function is responsible for adjust the section contents as
|
||
necessary, and (if using Rela relocs and generating a
|
||
relocatable output file) adjusting the reloc addend as
|
||
necessary.
|
||
|
||
This function does not have to worry about setting the reloc
|
||
address or the reloc symbol index.
|
||
|
||
LOCAL_SYMS is a pointer to the swapped in local symbols.
|
||
|
||
LOCAL_SECTIONS is an array giving the section in the input file
|
||
corresponding to the st_shndx field of each local symbol.
|
||
|
||
The global hash table entry for the global symbols can be found
|
||
via elf_sym_hashes (input_bfd).
|
||
|
||
When generating relocatable output, this function must handle
|
||
STB_LOCAL/STT_SECTION symbols specially. The output symbol is
|
||
going to be the section symbol corresponding to the output
|
||
section, which means that the addend must be adjusted
|
||
accordingly. */
|
||
|
||
static bfd_boolean
|
||
microblaze_elf_relocate_section (bfd *output_bfd,
|
||
struct bfd_link_info *info,
|
||
bfd *input_bfd,
|
||
asection *input_section,
|
||
bfd_byte *contents,
|
||
Elf_Internal_Rela *relocs,
|
||
Elf_Internal_Sym *local_syms,
|
||
asection **local_sections)
|
||
{
|
||
struct elf32_mb_link_hash_table *htab;
|
||
Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
||
struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
|
||
Elf_Internal_Rela *rel, *relend;
|
||
/* Assume success. */
|
||
bfd_boolean ret = TRUE;
|
||
asection *sreloc;
|
||
bfd_vma *local_got_offsets;
|
||
|
||
if (!microblaze_elf_howto_table[R_MICROBLAZE_max-1])
|
||
microblaze_elf_howto_init ();
|
||
|
||
htab = elf32_mb_hash_table (info);
|
||
local_got_offsets = elf_local_got_offsets (input_bfd);
|
||
|
||
sreloc = elf_section_data (input_section)->sreloc;
|
||
|
||
rel = relocs;
|
||
relend = relocs + input_section->reloc_count;
|
||
for (; rel < relend; rel++)
|
||
{
|
||
int r_type;
|
||
reloc_howto_type *howto;
|
||
unsigned long r_symndx;
|
||
bfd_vma addend = rel->r_addend;
|
||
bfd_vma offset = rel->r_offset;
|
||
struct elf_link_hash_entry *h;
|
||
Elf_Internal_Sym *sym;
|
||
asection *sec;
|
||
const char *sym_name;
|
||
bfd_reloc_status_type r = bfd_reloc_ok;
|
||
const char *errmsg = NULL;
|
||
bfd_boolean unresolved_reloc = FALSE;
|
||
|
||
h = NULL;
|
||
r_type = ELF32_R_TYPE (rel->r_info);
|
||
if (r_type < 0 || r_type >= (int) R_MICROBLAZE_max)
|
||
{
|
||
(*_bfd_error_handler) (_("%s: unknown relocation type %d"),
|
||
bfd_get_filename (input_bfd), (int) r_type);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
ret = FALSE;
|
||
continue;
|
||
}
|
||
|
||
howto = microblaze_elf_howto_table[r_type];
|
||
r_symndx = ELF32_R_SYM (rel->r_info);
|
||
|
||
if (info->relocatable)
|
||
{
|
||
/* This is a relocatable link. We don't have to change
|
||
anything, unless the reloc is against a section symbol,
|
||
in which case we have to adjust according to where the
|
||
section symbol winds up in the output section. */
|
||
sec = NULL;
|
||
if (r_symndx >= symtab_hdr->sh_info)
|
||
/* External symbol. */
|
||
continue;
|
||
|
||
/* Local symbol. */
|
||
sym = local_syms + r_symndx;
|
||
sym_name = "<local symbol>";
|
||
/* STT_SECTION: symbol is associated with a section. */
|
||
if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
|
||
/* Symbol isn't associated with a section. Nothing to do. */
|
||
continue;
|
||
|
||
sec = local_sections[r_symndx];
|
||
addend += sec->output_offset + sym->st_value;
|
||
#ifndef USE_REL
|
||
/* This can't be done for USE_REL because it doesn't mean anything
|
||
and elf_link_input_bfd asserts this stays zero. */
|
||
/* rel->r_addend = addend; */
|
||
#endif
|
||
|
||
#ifndef USE_REL
|
||
/* Addends are stored with relocs. We're done. */
|
||
continue;
|
||
#else /* USE_REL */
|
||
/* If partial_inplace, we need to store any additional addend
|
||
back in the section. */
|
||
if (!howto->partial_inplace)
|
||
continue;
|
||
/* ??? Here is a nice place to call a special_function like handler. */
|
||
r = _bfd_relocate_contents (howto, input_bfd, addend,
|
||
contents + offset);
|
||
#endif /* USE_REL */
|
||
}
|
||
else
|
||
{
|
||
bfd_vma relocation;
|
||
|
||
/* This is a final link. */
|
||
sym = NULL;
|
||
sec = NULL;
|
||
unresolved_reloc = FALSE;
|
||
|
||
if (r_symndx < symtab_hdr->sh_info)
|
||
{
|
||
/* Local symbol. */
|
||
sym = local_syms + r_symndx;
|
||
sec = local_sections[r_symndx];
|
||
if (sec == 0)
|
||
continue;
|
||
sym_name = "<local symbol>";
|
||
relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
|
||
/* r_addend may have changed if the reference section was
|
||
a merge section. */
|
||
addend = rel->r_addend;
|
||
}
|
||
else
|
||
{
|
||
/* External symbol. */
|
||
bfd_boolean warned ATTRIBUTE_UNUSED;
|
||
|
||
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
|
||
r_symndx, symtab_hdr, sym_hashes,
|
||
h, sec, relocation,
|
||
unresolved_reloc, warned);
|
||
sym_name = h->root.root.string;
|
||
}
|
||
|
||
/* Sanity check the address. */
|
||
if (offset > bfd_get_section_limit (output_bfd, input_section))
|
||
{
|
||
r = bfd_reloc_outofrange;
|
||
goto check_reloc;
|
||
}
|
||
|
||
switch ((int) r_type)
|
||
{
|
||
case (int) R_MICROBLAZE_SRO32 :
|
||
{
|
||
const char *name;
|
||
|
||
/* Only relocate if the symbol is defined. */
|
||
if (sec)
|
||
{
|
||
name = bfd_get_section_name (abfd, sec);
|
||
|
||
if (strcmp (name, ".sdata2") == 0
|
||
|| strcmp (name, ".sbss2") == 0)
|
||
{
|
||
if (ro_small_data_pointer == 0)
|
||
microblaze_elf_final_sdp (info);
|
||
if (ro_small_data_pointer == 0)
|
||
{
|
||
ret = FALSE;
|
||
r = bfd_reloc_undefined;
|
||
goto check_reloc;
|
||
}
|
||
|
||
/* At this point `relocation' contains the object's
|
||
address. */
|
||
relocation -= ro_small_data_pointer;
|
||
/* Now it contains the offset from _SDA2_BASE_. */
|
||
r = _bfd_final_link_relocate (howto, input_bfd,
|
||
input_section,
|
||
contents, offset,
|
||
relocation, addend);
|
||
}
|
||
else
|
||
{
|
||
(*_bfd_error_handler) (_("%s: The target (%s) of an %s relocation is in the wrong section (%s)"),
|
||
bfd_get_filename (input_bfd),
|
||
sym_name,
|
||
microblaze_elf_howto_table[(int) r_type]->name,
|
||
bfd_get_section_name (abfd, sec));
|
||
/*bfd_set_error (bfd_error_bad_value); ??? why? */
|
||
ret = FALSE;
|
||
continue;
|
||
}
|
||
}
|
||
}
|
||
break;
|
||
|
||
case (int) R_MICROBLAZE_SRW32 :
|
||
{
|
||
const char *name;
|
||
|
||
/* Only relocate if the symbol is defined. */
|
||
if (sec)
|
||
{
|
||
name = bfd_get_section_name (abfd, sec);
|
||
|
||
if (strcmp (name, ".sdata") == 0
|
||
|| strcmp (name, ".sbss") == 0)
|
||
{
|
||
if (rw_small_data_pointer == 0)
|
||
microblaze_elf_final_sdp (info);
|
||
if (rw_small_data_pointer == 0)
|
||
{
|
||
ret = FALSE;
|
||
r = bfd_reloc_undefined;
|
||
goto check_reloc;
|
||
}
|
||
|
||
/* At this point `relocation' contains the object's
|
||
address. */
|
||
relocation -= rw_small_data_pointer;
|
||
/* Now it contains the offset from _SDA_BASE_. */
|
||
r = _bfd_final_link_relocate (howto, input_bfd,
|
||
input_section,
|
||
contents, offset,
|
||
relocation, addend);
|
||
}
|
||
else
|
||
{
|
||
(*_bfd_error_handler) (_("%s: The target (%s) of an %s relocation is in the wrong section (%s)"),
|
||
bfd_get_filename (input_bfd),
|
||
sym_name,
|
||
microblaze_elf_howto_table[(int) r_type]->name,
|
||
bfd_get_section_name (abfd, sec));
|
||
/*bfd_set_error (bfd_error_bad_value); ??? why? */
|
||
ret = FALSE;
|
||
continue;
|
||
}
|
||
}
|
||
}
|
||
break;
|
||
|
||
case (int) R_MICROBLAZE_32_SYM_OP_SYM:
|
||
break; /* Do nothing. */
|
||
|
||
case (int) R_MICROBLAZE_GOTPC_64:
|
||
relocation = htab->sgotplt->output_section->vma
|
||
+ htab->sgotplt->output_offset;
|
||
relocation -= (input_section->output_section->vma
|
||
+ input_section->output_offset
|
||
+ offset + INST_WORD_SIZE);
|
||
relocation += addend;
|
||
bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
|
||
contents + offset + 2);
|
||
bfd_put_16 (input_bfd, relocation & 0xffff,
|
||
contents + offset + 2 + INST_WORD_SIZE);
|
||
break;
|
||
|
||
case (int) R_MICROBLAZE_PLT_64:
|
||
{
|
||
bfd_vma immediate;
|
||
if (htab->splt != NULL && h != NULL
|
||
&& h->plt.offset != (bfd_vma) -1)
|
||
{
|
||
relocation = (htab->splt->output_section->vma
|
||
+ htab->splt->output_offset
|
||
+ h->plt.offset);
|
||
unresolved_reloc = FALSE;
|
||
immediate = relocation - (input_section->output_section->vma
|
||
+ input_section->output_offset
|
||
+ offset + INST_WORD_SIZE);
|
||
bfd_put_16 (input_bfd, (immediate >> 16) & 0xffff,
|
||
contents + offset + 2);
|
||
bfd_put_16 (input_bfd, immediate & 0xffff,
|
||
contents + offset + 2 + INST_WORD_SIZE);
|
||
}
|
||
else
|
||
{
|
||
relocation -= (input_section->output_section->vma
|
||
+ input_section->output_offset
|
||
+ offset + INST_WORD_SIZE);
|
||
immediate = relocation;
|
||
bfd_put_16 (input_bfd, (immediate >> 16) & 0xffff,
|
||
contents + offset + 2);
|
||
bfd_put_16 (input_bfd, immediate & 0xffff,
|
||
contents + offset + 2 + INST_WORD_SIZE);
|
||
}
|
||
break;
|
||
}
|
||
|
||
case (int) R_MICROBLAZE_GOT_64:
|
||
{
|
||
if (htab->sgot == NULL)
|
||
abort ();
|
||
if (h == NULL)
|
||
{
|
||
bfd_vma off;
|
||
if (local_got_offsets == NULL)
|
||
abort ();
|
||
off = local_got_offsets[r_symndx];
|
||
/* The LSB indicates whether we've already
|
||
created relocation. */
|
||
if (off & 1)
|
||
off &= ~1;
|
||
else
|
||
{
|
||
bfd_put_32 (output_bfd, relocation + addend,
|
||
htab->sgot->contents + off);
|
||
|
||
if (info->shared)
|
||
{
|
||
Elf_Internal_Rela outrel;
|
||
bfd_byte *loc;
|
||
if (htab->srelgot == NULL)
|
||
abort ();
|
||
outrel.r_offset = (htab->sgot->output_section->vma
|
||
+ htab->sgot->output_offset
|
||
+ off);
|
||
outrel.r_info = ELF32_R_INFO (0, R_MICROBLAZE_REL);
|
||
outrel.r_addend = relocation + addend;
|
||
loc = htab->srelgot->contents;
|
||
loc += htab->srelgot->reloc_count++
|
||
* sizeof (Elf32_External_Rela);
|
||
bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
|
||
}
|
||
local_got_offsets[r_symndx] |= 1;
|
||
}
|
||
relocation = htab->sgot->output_section->vma
|
||
+ htab->sgot->output_offset + off
|
||
- htab->sgotplt->output_section->vma
|
||
- htab->sgotplt->output_offset;
|
||
unresolved_reloc = FALSE;
|
||
}
|
||
else
|
||
{
|
||
if (htab->sgotplt != NULL && h != NULL
|
||
&& h->got.offset != (bfd_vma) -1)
|
||
{
|
||
bfd_put_32 (output_bfd, relocation + addend,
|
||
htab->sgot->contents + h->got.offset);
|
||
relocation = htab->sgot->output_section->vma
|
||
+ htab->sgot->output_offset
|
||
+ h->got.offset
|
||
- htab->sgotplt->output_section->vma
|
||
- htab->sgotplt->output_offset;
|
||
unresolved_reloc = FALSE;
|
||
}
|
||
else
|
||
abort (); /* ??? */
|
||
}
|
||
bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
|
||
contents + offset + 2);
|
||
bfd_put_16 (input_bfd, relocation & 0xffff,
|
||
contents + offset + 2 + INST_WORD_SIZE);
|
||
break;
|
||
}
|
||
|
||
case (int) R_MICROBLAZE_GOTOFF_64:
|
||
{
|
||
bfd_vma immediate;
|
||
unsigned short lo, high;
|
||
relocation += addend;
|
||
relocation -= htab->sgotplt->output_section->vma
|
||
+ htab->sgotplt->output_offset;
|
||
/* Write this value into correct location. */
|
||
immediate = relocation;
|
||
lo = immediate & 0x0000ffff;
|
||
high = (immediate >> 16) & 0x0000ffff;
|
||
bfd_put_16 (input_bfd, high, contents + offset + 2);
|
||
bfd_put_16 (input_bfd, lo, contents + offset + INST_WORD_SIZE + 2);
|
||
break;
|
||
}
|
||
|
||
case (int) R_MICROBLAZE_GOTOFF_32:
|
||
{
|
||
relocation += addend;
|
||
relocation -= htab->sgotplt->output_section->vma
|
||
+ htab->sgotplt->output_offset;
|
||
/* Write this value into correct location. */
|
||
bfd_put_32 (input_bfd, relocation, contents + offset);
|
||
break;
|
||
}
|
||
|
||
case (int) R_MICROBLAZE_64_PCREL :
|
||
case (int) R_MICROBLAZE_64:
|
||
case (int) R_MICROBLAZE_32:
|
||
{
|
||
/* r_symndx will be zero only for relocs against symbols
|
||
from removed linkonce sections, or sections discarded by
|
||
a linker script. */
|
||
if (r_symndx == 0 || (input_section->flags & SEC_ALLOC) == 0)
|
||
{
|
||
relocation += addend;
|
||
if (r_type == R_MICROBLAZE_32)
|
||
bfd_put_32 (input_bfd, relocation, contents + offset);
|
||
else
|
||
{
|
||
if (r_type == R_MICROBLAZE_64_PCREL)
|
||
relocation -= (input_section->output_section->vma
|
||
+ input_section->output_offset
|
||
+ offset + INST_WORD_SIZE);
|
||
bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
|
||
contents + offset + 2);
|
||
bfd_put_16 (input_bfd, relocation & 0xffff,
|
||
contents + offset + 2 + INST_WORD_SIZE);
|
||
}
|
||
break;
|
||
}
|
||
|
||
if ((info->shared
|
||
&& (h == NULL
|
||
|| ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|
||
|| h->root.type != bfd_link_hash_undefweak)
|
||
&& (!howto->pc_relative
|
||
|| (h != NULL
|
||
&& h->dynindx != -1
|
||
&& (!info->symbolic
|
||
|| !h->def_regular))))
|
||
|| (!info->shared
|
||
&& h != NULL
|
||
&& h->dynindx != -1
|
||
&& !h->non_got_ref
|
||
&& ((h->def_dynamic
|
||
&& !h->def_regular)
|
||
|| h->root.type == bfd_link_hash_undefweak
|
||
|| h->root.type == bfd_link_hash_undefined)))
|
||
{
|
||
Elf_Internal_Rela outrel;
|
||
bfd_byte *loc;
|
||
bfd_boolean skip, relocate = FALSE;
|
||
|
||
/* When generating a shared object, these relocations
|
||
are copied into the output file to be resolved at run
|
||
time. */
|
||
|
||
BFD_ASSERT (sreloc != NULL);
|
||
|
||
skip = FALSE;
|
||
|
||
outrel.r_offset =
|
||
_bfd_elf_section_offset (output_bfd, info, input_section,
|
||
rel->r_offset);
|
||
if (outrel.r_offset == (bfd_vma) -1)
|
||
skip = TRUE;
|
||
else if (outrel.r_offset == (bfd_vma) -2)
|
||
skip = TRUE, relocate = TRUE;
|
||
outrel.r_offset += (input_section->output_section->vma
|
||
+ input_section->output_offset);
|
||
|
||
if (skip)
|
||
memset (&outrel, 0, sizeof outrel);
|
||
/* h->dynindx may be -1 if the symbol was marked to
|
||
become local. */
|
||
else if (h != NULL
|
||
&& ((! info->symbolic && h->dynindx != -1)
|
||
|| !h->def_regular))
|
||
{
|
||
BFD_ASSERT (h->dynindx != -1);
|
||
outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
|
||
outrel.r_addend = addend;
|
||
}
|
||
else
|
||
{
|
||
if (r_type == R_MICROBLAZE_32)
|
||
{
|
||
outrel.r_info = ELF32_R_INFO (0, R_MICROBLAZE_REL);
|
||
outrel.r_addend = relocation + addend;
|
||
}
|
||
else
|
||
{
|
||
BFD_FAIL ();
|
||
(*_bfd_error_handler)
|
||
(_("%B: probably compiled without -fPIC?"),
|
||
input_bfd);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return FALSE;
|
||
}
|
||
}
|
||
|
||
loc = sreloc->contents;
|
||
loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
|
||
bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
|
||
break;
|
||
}
|
||
else
|
||
{
|
||
relocation += addend;
|
||
if (r_type == R_MICROBLAZE_32)
|
||
bfd_put_32 (input_bfd, relocation, contents + offset);
|
||
else
|
||
{
|
||
if (r_type == R_MICROBLAZE_64_PCREL)
|
||
relocation -= (input_section->output_section->vma
|
||
+ input_section->output_offset
|
||
+ offset + INST_WORD_SIZE);
|
||
bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
|
||
contents + offset + 2);
|
||
bfd_put_16 (input_bfd, relocation & 0xffff,
|
||
contents + offset + 2 + INST_WORD_SIZE);
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
|
||
default :
|
||
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
||
contents, offset,
|
||
relocation, addend);
|
||
break;
|
||
}
|
||
}
|
||
|
||
check_reloc:
|
||
|
||
if (r != bfd_reloc_ok)
|
||
{
|
||
/* FIXME: This should be generic enough to go in a utility. */
|
||
const char *name;
|
||
|
||
if (h != NULL)
|
||
name = h->root.root.string;
|
||
else
|
||
{
|
||
name = (bfd_elf_string_from_elf_section
|
||
(input_bfd, symtab_hdr->sh_link, sym->st_name));
|
||
if (name == NULL || *name == '\0')
|
||
name = bfd_section_name (input_bfd, sec);
|
||
}
|
||
|
||
if (errmsg != NULL)
|
||
goto common_error;
|
||
|
||
switch (r)
|
||
{
|
||
case bfd_reloc_overflow:
|
||
if (!((*info->callbacks->reloc_overflow)
|
||
(info, (h ? &h->root : NULL), name, howto->name,
|
||
(bfd_vma) 0, input_bfd, input_section, offset)))
|
||
return FALSE;
|
||
break;
|
||
|
||
case bfd_reloc_undefined:
|
||
if (!((*info->callbacks->undefined_symbol)
|
||
(info, name, input_bfd, input_section, offset, TRUE)))
|
||
return FALSE;
|
||
break;
|
||
|
||
case bfd_reloc_outofrange:
|
||
errmsg = _("internal error: out of range error");
|
||
goto common_error;
|
||
|
||
case bfd_reloc_notsupported:
|
||
errmsg = _("internal error: unsupported relocation error");
|
||
goto common_error;
|
||
|
||
case bfd_reloc_dangerous:
|
||
errmsg = _("internal error: dangerous error");
|
||
goto common_error;
|
||
|
||
default:
|
||
errmsg = _("internal error: unknown error");
|
||
/* Fall through. */
|
||
common_error:
|
||
if (!((*info->callbacks->warning)
|
||
(info, errmsg, name, input_bfd, input_section, offset)))
|
||
return FALSE;
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
return ret;
|
||
}
|
||
|
||
/* Calculate fixup value for reference. */
|
||
|
||
static int
|
||
calc_fixup (bfd_vma addr, asection *sec)
|
||
{
|
||
int i, fixup = 0;
|
||
|
||
if (sec == NULL || sec->relax == NULL)
|
||
return 0;
|
||
|
||
/* Look for addr in relax table, total fixup value. */
|
||
for (i = 0; i < sec->relax_count; i++)
|
||
{
|
||
if (addr <= sec->relax[i].addr)
|
||
break;
|
||
fixup += sec->relax[i].size;
|
||
}
|
||
|
||
return fixup;
|
||
}
|
||
|
||
static bfd_boolean
|
||
microblaze_elf_relax_section (bfd *abfd,
|
||
asection *sec,
|
||
struct bfd_link_info *link_info,
|
||
bfd_boolean *again)
|
||
{
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
Elf_Internal_Rela *internal_relocs;
|
||
Elf_Internal_Rela *free_relocs = NULL;
|
||
Elf_Internal_Rela *irel, *irelend;
|
||
bfd_byte *contents = NULL;
|
||
bfd_byte *free_contents = NULL;
|
||
int rel_count;
|
||
unsigned int shndx;
|
||
int i, sym_index;
|
||
asection *o;
|
||
struct elf_link_hash_entry *sym_hash;
|
||
Elf_Internal_Sym *isymbuf, *isymend;
|
||
Elf_Internal_Sym *isym;
|
||
int symcount;
|
||
int offset;
|
||
bfd_vma src, dest;
|
||
|
||
/* We only do this once per section. We may be able to delete some code
|
||
by running multiple passes, but it is not worth it. */
|
||
*again = FALSE;
|
||
|
||
/* Only do this for a text section. */
|
||
if (link_info->relocatable
|
||
|| (sec->flags & SEC_RELOC) == 0
|
||
|| (sec->reloc_count == 0))
|
||
return TRUE;
|
||
|
||
BFD_ASSERT ((sec->size > 0) || (sec->rawsize > 0));
|
||
|
||
/* If this is the first time we have been called for this section,
|
||
initialize the cooked size. */
|
||
if (sec->size == 0)
|
||
sec->size = sec->rawsize;
|
||
|
||
/* Get symbols for this section. */
|
||
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
||
isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
|
||
symcount = symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
|
||
if (isymbuf == NULL)
|
||
isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, symcount,
|
||
0, NULL, NULL, NULL);
|
||
BFD_ASSERT (isymbuf != NULL);
|
||
|
||
internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, link_info->keep_memory);
|
||
if (internal_relocs == NULL)
|
||
goto error_return;
|
||
if (! link_info->keep_memory)
|
||
free_relocs = internal_relocs;
|
||
|
||
sec->relax = (struct relax_table *) bfd_malloc ((sec->reloc_count + 1)
|
||
* sizeof (struct relax_table));
|
||
if (sec->relax == NULL)
|
||
goto error_return;
|
||
sec->relax_count = 0;
|
||
|
||
irelend = internal_relocs + sec->reloc_count;
|
||
rel_count = 0;
|
||
for (irel = internal_relocs; irel < irelend; irel++, rel_count++)
|
||
{
|
||
bfd_vma symval;
|
||
if ((ELF32_R_TYPE (irel->r_info) != (int) R_MICROBLAZE_64_PCREL)
|
||
&& (ELF32_R_TYPE (irel->r_info) != (int) R_MICROBLAZE_64 ))
|
||
continue; /* Can't delete this reloc. */
|
||
|
||
/* Get the section contents. */
|
||
if (contents == NULL)
|
||
{
|
||
if (elf_section_data (sec)->this_hdr.contents != NULL)
|
||
contents = elf_section_data (sec)->this_hdr.contents;
|
||
else
|
||
{
|
||
contents = (bfd_byte *) bfd_malloc (sec->size);
|
||
if (contents == NULL)
|
||
goto error_return;
|
||
free_contents = contents;
|
||
|
||
if (!bfd_get_section_contents (abfd, sec, contents,
|
||
(file_ptr) 0, sec->size))
|
||
goto error_return;
|
||
elf_section_data (sec)->this_hdr.contents = contents;
|
||
}
|
||
}
|
||
|
||
/* Get the value of the symbol referred to by the reloc. */
|
||
if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
|
||
{
|
||
/* A local symbol. */
|
||
asection *sym_sec;
|
||
|
||
isym = isymbuf + ELF32_R_SYM (irel->r_info);
|
||
if (isym->st_shndx == SHN_UNDEF)
|
||
sym_sec = bfd_und_section_ptr;
|
||
else if (isym->st_shndx == SHN_ABS)
|
||
sym_sec = bfd_abs_section_ptr;
|
||
else if (isym->st_shndx == SHN_COMMON)
|
||
sym_sec = bfd_com_section_ptr;
|
||
else
|
||
sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
|
||
|
||
symval = _bfd_elf_rela_local_sym (abfd, isym, &sym_sec, irel);
|
||
}
|
||
else
|
||
{
|
||
unsigned long indx;
|
||
struct elf_link_hash_entry *h;
|
||
|
||
indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
|
||
h = elf_sym_hashes (abfd)[indx];
|
||
BFD_ASSERT (h != NULL);
|
||
|
||
if (h->root.type != bfd_link_hash_defined
|
||
&& h->root.type != bfd_link_hash_defweak)
|
||
/* This appears to be a reference to an undefined
|
||
symbol. Just ignore it--it will be caught by the
|
||
regular reloc processing. */
|
||
continue;
|
||
|
||
symval = (h->root.u.def.value
|
||
+ h->root.u.def.section->output_section->vma
|
||
+ h->root.u.def.section->output_offset);
|
||
}
|
||
|
||
/* If this is a PC-relative reloc, subtract the instr offset from
|
||
the symbol value. */
|
||
if (ELF32_R_TYPE (irel->r_info) == (int) R_MICROBLAZE_64_PCREL)
|
||
{
|
||
symval = symval + irel->r_addend
|
||
- (irel->r_offset
|
||
+ sec->output_section->vma
|
||
+ sec->output_offset);
|
||
}
|
||
else
|
||
symval += irel->r_addend;
|
||
|
||
if ((symval & 0xffff8000) == 0
|
||
|| (symval & 0xffff8000) == 0xffff8000)
|
||
{
|
||
/* We can delete this instruction. */
|
||
sec->relax[sec->relax_count].addr = irel->r_offset;
|
||
sec->relax[sec->relax_count].size = INST_WORD_SIZE;
|
||
sec->relax_count++;
|
||
|
||
/* Rewrite relocation type. */
|
||
switch ((enum elf_microblaze_reloc_type) ELF32_R_TYPE (irel->r_info))
|
||
{
|
||
case R_MICROBLAZE_64_PCREL:
|
||
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
||
(int) R_MICROBLAZE_32_PCREL_LO);
|
||
break;
|
||
case R_MICROBLAZE_64:
|
||
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
||
(int) R_MICROBLAZE_32_LO);
|
||
break;
|
||
default:
|
||
/* Cannot happen. */
|
||
BFD_ASSERT (FALSE);
|
||
}
|
||
}
|
||
} /* Loop through all relocations. */
|
||
|
||
/* Loop through the relocs again, and see if anything needs to change. */
|
||
if (sec->relax_count > 0)
|
||
{
|
||
shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
|
||
rel_count = 0;
|
||
sec->relax[sec->relax_count].addr = sec->size;
|
||
|
||
for (irel = internal_relocs; irel < irelend; irel++, rel_count++)
|
||
{
|
||
bfd_vma nraddr;
|
||
|
||
/* Get the new reloc address. */
|
||
nraddr = irel->r_offset - calc_fixup (irel->r_offset, sec);
|
||
switch ((enum elf_microblaze_reloc_type) ELF32_R_TYPE (irel->r_info))
|
||
{
|
||
default:
|
||
break;
|
||
case R_MICROBLAZE_64_PCREL:
|
||
break;
|
||
case R_MICROBLAZE_64:
|
||
case R_MICROBLAZE_32_LO:
|
||
/* If this reloc is against a symbol defined in this
|
||
section, we must check the addend to see it will put the value in
|
||
range to be adjusted, and hence must be changed. */
|
||
if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
|
||
{
|
||
isym = isymbuf + ELF32_R_SYM (irel->r_info);
|
||
/* Only handle relocs against .text. */
|
||
if (isym->st_shndx == shndx
|
||
&& ELF32_ST_TYPE (isym->st_info) == STT_SECTION)
|
||
irel->r_addend -= calc_fixup (irel->r_addend, sec);
|
||
}
|
||
break;
|
||
case R_MICROBLAZE_NONE:
|
||
{
|
||
/* This was a PC-relative instruction that was
|
||
completely resolved. */
|
||
int sfix, efix;
|
||
bfd_vma target_address;
|
||
target_address = irel->r_addend + irel->r_offset;
|
||
sfix = calc_fixup (irel->r_offset, sec);
|
||
efix = calc_fixup (target_address, sec);
|
||
irel->r_addend -= (efix - sfix);
|
||
/* Should use HOWTO. */
|
||
bfd_put_16 (abfd, irel->r_addend, contents + irel->r_offset + 2);
|
||
}
|
||
break;
|
||
case R_MICROBLAZE_64_NONE:
|
||
{
|
||
/* This was a PC-relative 64-bit instruction that was
|
||
completely resolved. */
|
||
int sfix, efix;
|
||
bfd_vma target_address;
|
||
target_address = irel->r_addend + irel->r_offset + INST_WORD_SIZE;
|
||
sfix = calc_fixup (irel->r_offset + INST_WORD_SIZE, sec);
|
||
efix = calc_fixup (target_address, sec);
|
||
irel->r_addend -= (efix - sfix);
|
||
bfd_put_16 (abfd, irel->r_addend, contents + irel->r_offset
|
||
+ INST_WORD_SIZE + 2);
|
||
}
|
||
break;
|
||
}
|
||
irel->r_offset = nraddr;
|
||
} /* Change all relocs in this section. */
|
||
|
||
/* Look through all other sections. */
|
||
for (o = abfd->sections; o != NULL; o = o->next)
|
||
{
|
||
Elf_Internal_Rela *irelocs;
|
||
Elf_Internal_Rela *irelscan, *irelscanend;
|
||
bfd_byte *ocontents;
|
||
|
||
if (o == sec
|
||
|| (o->flags & SEC_RELOC) == 0
|
||
|| o->reloc_count == 0)
|
||
continue;
|
||
|
||
/* We always cache the relocs. Perhaps, if info->keep_memory is
|
||
FALSE, we should free them, if we are permitted to. */
|
||
|
||
irelocs = _bfd_elf_link_read_relocs (abfd, o, NULL, NULL, TRUE);
|
||
if (irelocs == NULL)
|
||
goto error_return;
|
||
|
||
ocontents = NULL;
|
||
irelscanend = irelocs + o->reloc_count;
|
||
for (irelscan = irelocs; irelscan < irelscanend; irelscan++)
|
||
{
|
||
if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32)
|
||
{
|
||
isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
|
||
|
||
/* Look at the reloc only if the value has been resolved. */
|
||
if (isym->st_shndx == shndx
|
||
&& (ELF32_ST_TYPE (isym->st_info) == STT_SECTION))
|
||
{
|
||
if (ocontents == NULL)
|
||
{
|
||
if (elf_section_data (o)->this_hdr.contents != NULL)
|
||
ocontents = elf_section_data (o)->this_hdr.contents;
|
||
else
|
||
{
|
||
/* We always cache the section contents.
|
||
Perhaps, if info->keep_memory is FALSE, we
|
||
should free them, if we are permitted to. */
|
||
if (o->rawsize == 0)
|
||
o->rawsize = o->size;
|
||
ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
|
||
if (ocontents == NULL)
|
||
goto error_return;
|
||
if (!bfd_get_section_contents (abfd, o, ocontents,
|
||
(file_ptr) 0,
|
||
o->rawsize))
|
||
goto error_return;
|
||
elf_section_data (o)->this_hdr.contents = ocontents;
|
||
}
|
||
|
||
}
|
||
irelscan->r_addend -= calc_fixup (irelscan->r_addend, sec);
|
||
}
|
||
else if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32_SYM_OP_SYM)
|
||
{
|
||
isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
|
||
|
||
/* Look at the reloc only if the value has been resolved. */
|
||
if (ocontents == NULL)
|
||
{
|
||
if (elf_section_data (o)->this_hdr.contents != NULL)
|
||
ocontents = elf_section_data (o)->this_hdr.contents;
|
||
else
|
||
{
|
||
/* We always cache the section contents.
|
||
Perhaps, if info->keep_memory is FALSE, we
|
||
should free them, if we are permitted to. */
|
||
|
||
if (o->rawsize == 0)
|
||
o->rawsize = o->size;
|
||
ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
|
||
if (ocontents == NULL)
|
||
goto error_return;
|
||
if (!bfd_get_section_contents (abfd, o, ocontents,
|
||
(file_ptr) 0,
|
||
o->rawsize))
|
||
goto error_return;
|
||
elf_section_data (o)->this_hdr.contents = ocontents;
|
||
}
|
||
}
|
||
irelscan->r_addend -= calc_fixup (irel->r_addend
|
||
+ isym->st_value,
|
||
sec);
|
||
}
|
||
}
|
||
else if ((ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32_PCREL_LO)
|
||
|| (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32_LO))
|
||
{
|
||
isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
|
||
|
||
/* Look at the reloc only if the value has been resolved. */
|
||
if (isym->st_shndx == shndx
|
||
&& (ELF32_ST_TYPE (isym->st_info) == STT_SECTION))
|
||
{
|
||
bfd_vma immediate;
|
||
bfd_vma target_address;
|
||
|
||
if (ocontents == NULL)
|
||
{
|
||
if (elf_section_data (o)->this_hdr.contents != NULL)
|
||
ocontents = elf_section_data (o)->this_hdr.contents;
|
||
else
|
||
{
|
||
/* We always cache the section contents.
|
||
Perhaps, if info->keep_memory is FALSE, we
|
||
should free them, if we are permitted to. */
|
||
if (o->rawsize == 0)
|
||
o->rawsize = o->size;
|
||
ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
|
||
if (ocontents == NULL)
|
||
goto error_return;
|
||
if (!bfd_get_section_contents (abfd, o, ocontents,
|
||
(file_ptr) 0,
|
||
o->rawsize))
|
||
goto error_return;
|
||
elf_section_data (o)->this_hdr.contents = ocontents;
|
||
}
|
||
}
|
||
|
||
immediate = (unsigned short) bfd_get_16 (abfd, ocontents +
|
||
irelscan->r_offset + 2);
|
||
target_address = immediate;
|
||
offset = calc_fixup (target_address, sec);
|
||
immediate -= offset;
|
||
irelscan->r_addend -= offset;
|
||
bfd_put_16 (abfd, immediate, ocontents + irelscan->r_offset + 2);
|
||
}
|
||
}
|
||
|
||
if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_64)
|
||
{
|
||
isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
|
||
|
||
/* Look at the reloc only if the value has been resolved. */
|
||
if (isym->st_shndx == shndx
|
||
&& (ELF32_ST_TYPE (isym->st_info) == STT_SECTION))
|
||
{
|
||
bfd_vma immediate;
|
||
|
||
if (ocontents == NULL)
|
||
{
|
||
if (elf_section_data (o)->this_hdr.contents != NULL)
|
||
ocontents = elf_section_data (o)->this_hdr.contents;
|
||
else
|
||
{
|
||
/* We always cache the section contents.
|
||
Perhaps, if info->keep_memory is FALSE, we
|
||
should free them, if we are permitted to. */
|
||
|
||
if (o->rawsize == 0)
|
||
o->rawsize = o->size;
|
||
ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
|
||
if (ocontents == NULL)
|
||
goto error_return;
|
||
if (!bfd_get_section_contents (abfd, o, ocontents,
|
||
(file_ptr) 0,
|
||
o->rawsize))
|
||
goto error_return;
|
||
elf_section_data (o)->this_hdr.contents = ocontents;
|
||
}
|
||
}
|
||
immediate = (unsigned short) (bfd_get_16 (abfd, ocontents
|
||
+ irelscan->r_offset
|
||
+ 2) << 16)
|
||
& 0xffff0000;
|
||
immediate += (unsigned short) (bfd_get_16 (abfd, ocontents
|
||
+ irelscan->r_offset
|
||
+ INST_WORD_SIZE + 2))
|
||
& 0x0000ffff;
|
||
|
||
offset = calc_fixup (irelscan->r_addend, sec);
|
||
immediate -= offset;
|
||
irelscan->r_addend -= offset;
|
||
}
|
||
}
|
||
else if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_64_PCREL)
|
||
{
|
||
isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
|
||
|
||
/* Look at the reloc only if the value has been resolved. */
|
||
if (isym->st_shndx == shndx
|
||
&& (ELF32_ST_TYPE (isym->st_info) == STT_SECTION))
|
||
{
|
||
bfd_vma immediate;
|
||
bfd_vma target_address;
|
||
|
||
if (ocontents == NULL)
|
||
{
|
||
if (elf_section_data (o)->this_hdr.contents != NULL)
|
||
ocontents = elf_section_data (o)->this_hdr.contents;
|
||
else
|
||
{
|
||
/* We always cache the section contents.
|
||
Perhaps, if info->keep_memory is FALSE, we
|
||
should free them, if we are permitted to. */
|
||
if (o->rawsize == 0)
|
||
o->rawsize = o->size;
|
||
ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
|
||
if (ocontents == NULL)
|
||
goto error_return;
|
||
if (!bfd_get_section_contents (abfd, o, ocontents,
|
||
(file_ptr) 0,
|
||
o->rawsize))
|
||
goto error_return;
|
||
elf_section_data (o)->this_hdr.contents = ocontents;
|
||
}
|
||
}
|
||
|
||
immediate = (unsigned short)
|
||
(bfd_get_16 (abfd, ocontents + irelscan->r_offset + 2) << 16)
|
||
& 0xffff0000;
|
||
immediate += (unsigned short)
|
||
(bfd_get_16 (abfd, ocontents + irelscan->r_offset
|
||
+ INST_WORD_SIZE + 2))
|
||
& 0x0000ffff;
|
||
target_address = immediate;
|
||
offset = calc_fixup (target_address, sec);
|
||
immediate -= offset;
|
||
irelscan->r_addend -= offset;
|
||
bfd_put_16 (abfd, ((immediate >> 16) & 0x0000ffff),
|
||
ocontents + irelscan->r_offset + 2);
|
||
bfd_put_16 (abfd, (immediate & 0x0000ffff),
|
||
ocontents + irelscan->r_offset + INST_WORD_SIZE + 2);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Adjust the local symbols defined in this section. */
|
||
isymend = isymbuf + symtab_hdr->sh_info;
|
||
for (isym = isymbuf; isym < isymend; isym++)
|
||
{
|
||
if (isym->st_shndx == shndx)
|
||
isym->st_value =- calc_fixup (isym->st_value, sec);
|
||
}
|
||
|
||
/* Now adjust the global symbols defined in this section. */
|
||
isym = isymbuf + symtab_hdr->sh_info;
|
||
isymend = isymbuf + (symtab_hdr->sh_size / sizeof (Elf32_External_Sym));
|
||
for (sym_index = 0; isym < isymend; isym++, sym_index++)
|
||
{
|
||
sym_hash = elf_sym_hashes (abfd)[sym_index];
|
||
if (isym->st_shndx == shndx
|
||
&& (sym_hash->root.type == bfd_link_hash_defined
|
||
|| sym_hash->root.type == bfd_link_hash_defweak)
|
||
&& sym_hash->root.u.def.section == sec)
|
||
{
|
||
sym_hash->root.u.def.value -= calc_fixup (sym_hash->root.u.def.value,
|
||
sec);
|
||
}
|
||
}
|
||
|
||
/* Physically move the code and change the cooked size. */
|
||
dest = sec->relax[0].addr;
|
||
for (i = 0; i < sec->relax_count; i++)
|
||
{
|
||
int len;
|
||
src = sec->relax[i].addr + sec->relax[i].size;
|
||
len = sec->relax[i+1].addr - sec->relax[i].addr - sec->relax[i].size;
|
||
|
||
memmove (contents + dest, contents + src, len);
|
||
sec->size -= sec->relax[i].size;
|
||
dest += len;
|
||
}
|
||
|
||
elf_section_data (sec)->relocs = internal_relocs;
|
||
free_relocs = NULL;
|
||
|
||
elf_section_data (sec)->this_hdr.contents = contents;
|
||
free_contents = NULL;
|
||
|
||
symtab_hdr->contents = (bfd_byte *) isymbuf;
|
||
}
|
||
|
||
if (free_relocs != NULL)
|
||
{
|
||
free (free_relocs);
|
||
free_relocs = NULL;
|
||
}
|
||
|
||
if (free_contents != NULL)
|
||
{
|
||
if (!link_info->keep_memory)
|
||
free (free_contents);
|
||
else
|
||
/* Cache the section contents for elf_link_input_bfd. */
|
||
elf_section_data (sec)->this_hdr.contents = contents;
|
||
free_contents = NULL;
|
||
}
|
||
|
||
if (sec->relax_count == 0)
|
||
{
|
||
free (sec->relax);
|
||
sec->relax = NULL;
|
||
}
|
||
return TRUE;
|
||
|
||
error_return:
|
||
if (free_relocs != NULL)
|
||
free (free_relocs);
|
||
if (free_contents != NULL)
|
||
free (free_contents);
|
||
if (sec->relax != NULL)
|
||
{
|
||
free (sec->relax);
|
||
sec->relax = NULL;
|
||
sec->relax_count = 0;
|
||
}
|
||
return FALSE;
|
||
}
|
||
|
||
/* Return the section that should be marked against GC for a given
|
||
relocation. */
|
||
|
||
static asection *
|
||
microblaze_elf_gc_mark_hook (asection *sec,
|
||
struct bfd_link_info * info ATTRIBUTE_UNUSED,
|
||
Elf_Internal_Rela * rel,
|
||
struct elf_link_hash_entry * h,
|
||
Elf_Internal_Sym * sym)
|
||
{
|
||
if (h != NULL)
|
||
{
|
||
switch (ELF32_R_TYPE (rel->r_info))
|
||
{
|
||
case R_MICROBLAZE_GNU_VTINHERIT:
|
||
case R_MICROBLAZE_GNU_VTENTRY:
|
||
break;
|
||
|
||
default:
|
||
switch (h->root.type)
|
||
{
|
||
case bfd_link_hash_defined:
|
||
case bfd_link_hash_defweak:
|
||
return h->root.u.def.section;
|
||
|
||
case bfd_link_hash_common:
|
||
return h->root.u.c.p->section;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
else
|
||
return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* Update the got entry reference counts for the section being removed. */
|
||
|
||
static bfd_boolean
|
||
microblaze_elf_gc_sweep_hook (bfd * abfd ATTRIBUTE_UNUSED,
|
||
struct bfd_link_info * info ATTRIBUTE_UNUSED,
|
||
asection * sec ATTRIBUTE_UNUSED,
|
||
const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED)
|
||
{
|
||
return TRUE;
|
||
}
|
||
|
||
/* PIC support. */
|
||
|
||
#define PLT_ENTRY_SIZE 16
|
||
|
||
#define PLT_ENTRY_WORD_0 0xb0000000 /* "imm 0". */
|
||
#define PLT_ENTRY_WORD_1 0xe9940000 /* "lwi r12,r20,0" - relocated to lwi r12,r20,func@GOT. */
|
||
#define PLT_ENTRY_WORD_1_NOPIC 0xe9800000 /* "lwi r12,r0,0" - non-PIC object. */
|
||
#define PLT_ENTRY_WORD_2 0x98186000 /* "brad r12". */
|
||
#define PLT_ENTRY_WORD_3 0x80000000 /* "nop". */
|
||
|
||
/* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
|
||
shortcuts to them in our hash table. */
|
||
|
||
static bfd_boolean
|
||
create_got_section (bfd *dynobj, struct bfd_link_info *info)
|
||
{
|
||
struct elf32_mb_link_hash_table *htab;
|
||
|
||
if (! _bfd_elf_create_got_section (dynobj, info))
|
||
return FALSE;
|
||
htab = elf32_mb_hash_table (info);
|
||
htab->sgot = bfd_get_section_by_name (dynobj, ".got");
|
||
htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
|
||
if (!htab->sgot || !htab->sgotplt)
|
||
return FALSE;
|
||
|
||
htab->srelgot = bfd_make_section (dynobj, ".rela.got");
|
||
if (htab->srelgot == NULL
|
||
|| ! bfd_set_section_flags (dynobj, htab->srelgot, SEC_ALLOC
|
||
| SEC_LOAD
|
||
| SEC_HAS_CONTENTS
|
||
| SEC_IN_MEMORY
|
||
| SEC_LINKER_CREATED
|
||
| SEC_READONLY)
|
||
|| ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
|
||
return FALSE;
|
||
return TRUE;
|
||
}
|
||
|
||
/* Look through the relocs for a section during the first phase. */
|
||
|
||
static bfd_boolean
|
||
microblaze_elf_check_relocs (bfd * abfd,
|
||
struct bfd_link_info * info,
|
||
asection * sec,
|
||
const Elf_Internal_Rela * relocs)
|
||
{
|
||
Elf_Internal_Shdr * symtab_hdr;
|
||
struct elf_link_hash_entry ** sym_hashes;
|
||
struct elf_link_hash_entry ** sym_hashes_end;
|
||
const Elf_Internal_Rela * rel;
|
||
const Elf_Internal_Rela * rel_end;
|
||
struct elf32_mb_link_hash_table *htab;
|
||
bfd_vma *local_got_offsets;
|
||
asection *sreloc = NULL;
|
||
|
||
if (info->relocatable)
|
||
return TRUE;
|
||
|
||
htab = elf32_mb_hash_table (info);
|
||
local_got_offsets = elf_local_got_offsets (abfd);
|
||
symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
|
||
sym_hashes = elf_sym_hashes (abfd);
|
||
sym_hashes_end = sym_hashes + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
|
||
if (!elf_bad_symtab (abfd))
|
||
sym_hashes_end -= symtab_hdr->sh_info;
|
||
|
||
rel_end = relocs + sec->reloc_count;
|
||
|
||
for (rel = relocs; rel < rel_end; rel++)
|
||
{
|
||
unsigned int r_type;
|
||
struct elf_link_hash_entry * h;
|
||
unsigned long r_symndx;
|
||
|
||
r_symndx = ELF32_R_SYM (rel->r_info);
|
||
r_type = ELF32_R_TYPE (rel->r_info);
|
||
|
||
if (r_symndx < symtab_hdr->sh_info)
|
||
h = NULL;
|
||
else
|
||
h = sym_hashes [r_symndx - symtab_hdr->sh_info];
|
||
|
||
switch (r_type)
|
||
{
|
||
/* This relocation describes the C++ object vtable hierarchy.
|
||
Reconstruct it for later use during GC. */
|
||
case R_MICROBLAZE_GNU_VTINHERIT:
|
||
if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
|
||
return FALSE;
|
||
break;
|
||
|
||
/* This relocation describes which C++ vtable entries are actually
|
||
used. Record for later use during GC. */
|
||
case R_MICROBLAZE_GNU_VTENTRY:
|
||
if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
|
||
return FALSE;
|
||
break;
|
||
|
||
/* This relocation requires .plt entry. */
|
||
case R_MICROBLAZE_PLT_64:
|
||
if (h != NULL)
|
||
{
|
||
h->needs_plt = 1;
|
||
h->plt.refcount += 1;
|
||
}
|
||
break;
|
||
|
||
/* This relocation requires .got entry. */
|
||
case R_MICROBLAZE_GOT_64:
|
||
if (htab->sgot == NULL)
|
||
{
|
||
if (htab->elf.dynobj == NULL)
|
||
htab->elf.dynobj = abfd;
|
||
if (!create_got_section (htab->elf.dynobj, info))
|
||
return FALSE;
|
||
}
|
||
if (h != NULL)
|
||
{
|
||
h->got.refcount += 1;
|
||
}
|
||
else
|
||
{
|
||
bfd_signed_vma *local_got_refcounts;
|
||
|
||
/* This is a global offset table entry for a local symbol. */
|
||
local_got_refcounts = elf_local_got_refcounts (abfd);
|
||
if (local_got_refcounts == NULL)
|
||
{
|
||
bfd_size_type size;
|
||
|
||
size = symtab_hdr->sh_info;
|
||
size *= sizeof (bfd_signed_vma);
|
||
local_got_refcounts = bfd_zalloc (abfd, size);
|
||
if (local_got_refcounts == NULL)
|
||
return FALSE;
|
||
elf_local_got_refcounts (abfd) = local_got_refcounts;
|
||
}
|
||
local_got_refcounts[r_symndx] += 1;
|
||
}
|
||
break;
|
||
|
||
case R_MICROBLAZE_64:
|
||
case R_MICROBLAZE_64_PCREL:
|
||
case R_MICROBLAZE_32:
|
||
{
|
||
if (h != NULL && !info->shared)
|
||
{
|
||
/* we may need a copy reloc. */
|
||
h->non_got_ref = 1;
|
||
|
||
/* we may also need a .plt entry. */
|
||
h->plt.refcount += 1;
|
||
if (ELF32_R_TYPE (rel->r_info) != R_MICROBLAZE_64_PCREL)
|
||
h->pointer_equality_needed = 1;
|
||
}
|
||
|
||
|
||
/* If we are creating a shared library, and this is a reloc
|
||
against a global symbol, or a non PC relative reloc
|
||
against a local symbol, then we need to copy the reloc
|
||
into the shared library. However, if we are linking with
|
||
-Bsymbolic, we do not need to copy a reloc against a
|
||
global symbol which is defined in an object we are
|
||
including in the link (i.e., DEF_REGULAR is set). At
|
||
this point we have not seen all the input files, so it is
|
||
possible that DEF_REGULAR is not set now but will be set
|
||
later (it is never cleared). In case of a weak definition,
|
||
DEF_REGULAR may be cleared later by a strong definition in
|
||
a shared library. We account for that possibility below by
|
||
storing information in the relocs_copied field of the hash
|
||
table entry. A similar situation occurs when creating
|
||
shared libraries and symbol visibility changes render the
|
||
symbol local.
|
||
|
||
If on the other hand, we are creating an executable, we
|
||
may need to keep relocations for symbols satisfied by a
|
||
dynamic library if we manage to avoid copy relocs for the
|
||
symbol. */
|
||
|
||
if ((info->shared
|
||
&& (sec->flags & SEC_ALLOC) != 0
|
||
&& (r_type != R_MICROBLAZE_64_PCREL
|
||
|| (h != NULL
|
||
&& (! info->symbolic
|
||
|| h->root.type == bfd_link_hash_defweak
|
||
|| !h->def_regular))))
|
||
|| (!info->shared
|
||
&& (sec->flags & SEC_ALLOC) != 0
|
||
&& h != NULL
|
||
&& (h->root.type == bfd_link_hash_defweak
|
||
|| !h->def_regular)))
|
||
{
|
||
struct elf32_mb_dyn_relocs *p;
|
||
struct elf32_mb_dyn_relocs **head;
|
||
|
||
/* When creating a shared object, we must copy these
|
||
relocs into the output file. We create a reloc
|
||
section in dynobj and make room for the reloc. */
|
||
|
||
if (sreloc == NULL)
|
||
{
|
||
const char *name;
|
||
bfd *dynobj;
|
||
unsigned int strndx = elf_elfheader (abfd)->e_shstrndx;
|
||
unsigned int shnam = elf_section_data (sec)->rel_hdr.sh_name;
|
||
|
||
name = bfd_elf_string_from_elf_section (abfd, strndx, shnam);
|
||
if (name == NULL)
|
||
return FALSE;
|
||
|
||
if (strncmp (name, ".rela", 5) != 0
|
||
|| strcmp (bfd_get_section_name (abfd, sec),
|
||
name + 5) != 0)
|
||
{
|
||
(*_bfd_error_handler)
|
||
(_("%B: bad relocation section name `%s\'"),
|
||
abfd, name);
|
||
}
|
||
|
||
if (htab->elf.dynobj == NULL)
|
||
htab->elf.dynobj = abfd;
|
||
dynobj = htab->elf.dynobj;
|
||
|
||
sreloc = bfd_get_section_by_name (dynobj, name);
|
||
if (sreloc == NULL)
|
||
{
|
||
flagword flags;
|
||
|
||
sreloc = bfd_make_section (dynobj, name);
|
||
flags = (SEC_HAS_CONTENTS | SEC_READONLY
|
||
| SEC_IN_MEMORY | SEC_LINKER_CREATED);
|
||
if ((sec->flags & SEC_ALLOC) != 0)
|
||
flags |= SEC_ALLOC | SEC_LOAD;
|
||
if (sreloc == NULL
|
||
|| ! bfd_set_section_flags (dynobj, sreloc, flags)
|
||
|| ! bfd_set_section_alignment (dynobj, sreloc, 2))
|
||
return FALSE;
|
||
}
|
||
elf_section_data (sec)->sreloc = sreloc;
|
||
}
|
||
|
||
/* If this is a global symbol, we count the number of
|
||
relocations we need for this symbol. */
|
||
if (h != NULL)
|
||
head = &((struct elf32_mb_link_hash_entry *) h)->dyn_relocs;
|
||
else
|
||
{
|
||
/* Track dynamic relocs needed for local syms too.
|
||
We really need local syms available to do this
|
||
easily. Oh well. */
|
||
|
||
asection *s;
|
||
Elf_Internal_Sym *isym;
|
||
void *vpp;
|
||
|
||
isym = bfd_sym_from_r_symndx (&htab->sym_sec,
|
||
abfd, r_symndx);
|
||
if (isym == NULL)
|
||
return FALSE;
|
||
|
||
s = bfd_section_from_elf_index (abfd, isym->st_shndx);
|
||
if (s == NULL)
|
||
return FALSE;
|
||
|
||
vpp = &elf_section_data (s)->local_dynrel;
|
||
head = (struct elf32_mb_dyn_relocs **) vpp;
|
||
}
|
||
|
||
p = *head;
|
||
if (p == NULL || p->sec != sec)
|
||
{
|
||
bfd_size_type amt = sizeof *p;
|
||
p = ((struct elf32_mb_dyn_relocs *)
|
||
bfd_alloc (htab->elf.dynobj, amt));
|
||
if (p == NULL)
|
||
return FALSE;
|
||
p->next = *head;
|
||
*head = p;
|
||
p->sec = sec;
|
||
p->count = 0;
|
||
p->pc_count = 0;
|
||
}
|
||
|
||
p->count += 1;
|
||
if (r_type == R_MICROBLAZE_64_PCREL)
|
||
p->pc_count += 1;
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
static bfd_boolean
|
||
microblaze_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
|
||
{
|
||
struct elf32_mb_link_hash_table *htab;
|
||
|
||
htab = elf32_mb_hash_table (info);
|
||
if (!htab->sgot && !create_got_section (dynobj, info))
|
||
return FALSE;
|
||
|
||
if (!_bfd_elf_create_dynamic_sections (dynobj, info))
|
||
return FALSE;
|
||
|
||
htab->splt = bfd_get_section_by_name (dynobj, ".plt");
|
||
htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
|
||
htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
|
||
if (!info->shared)
|
||
htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
|
||
|
||
if (!htab->splt || !htab->srelplt || !htab->sdynbss
|
||
|| (!info->shared && !htab->srelbss))
|
||
abort ();
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Copy the extra info we tack onto an elf_link_hash_entry. */
|
||
|
||
static void
|
||
microblaze_elf_copy_indirect_symbol (struct bfd_link_info *info,
|
||
struct elf_link_hash_entry *dir,
|
||
struct elf_link_hash_entry *ind)
|
||
{
|
||
struct elf32_mb_link_hash_entry *edir, *eind;
|
||
|
||
edir = (struct elf32_mb_link_hash_entry *) dir;
|
||
eind = (struct elf32_mb_link_hash_entry *) ind;
|
||
|
||
if (eind->dyn_relocs != NULL)
|
||
{
|
||
if (edir->dyn_relocs != NULL)
|
||
{
|
||
struct elf32_mb_dyn_relocs **pp;
|
||
struct elf32_mb_dyn_relocs *p;
|
||
|
||
if (ind->root.type == bfd_link_hash_indirect)
|
||
abort ();
|
||
|
||
/* Add reloc counts against the weak sym to the strong sym
|
||
list. Merge any entries against the same section. */
|
||
for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
|
||
{
|
||
struct elf32_mb_dyn_relocs *q;
|
||
|
||
for (q = edir->dyn_relocs; q != NULL; q = q->next)
|
||
if (q->sec == p->sec)
|
||
{
|
||
q->pc_count += p->pc_count;
|
||
q->count += p->count;
|
||
*pp = p->next;
|
||
break;
|
||
}
|
||
if (q == NULL)
|
||
pp = &p->next;
|
||
}
|
||
*pp = edir->dyn_relocs;
|
||
}
|
||
|
||
edir->dyn_relocs = eind->dyn_relocs;
|
||
eind->dyn_relocs = NULL;
|
||
}
|
||
|
||
_bfd_elf_link_hash_copy_indirect (info, dir, ind);
|
||
}
|
||
|
||
static bfd_boolean
|
||
microblaze_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
|
||
struct elf_link_hash_entry *h)
|
||
{
|
||
struct elf32_mb_link_hash_table *htab;
|
||
struct elf32_mb_link_hash_entry * eh;
|
||
struct elf32_mb_dyn_relocs *p;
|
||
asection *sdynbss, *s;
|
||
unsigned int power_of_two;
|
||
bfd *dynobj;
|
||
|
||
htab = elf32_mb_hash_table (info);
|
||
|
||
/* If this is a function, put it in the procedure linkage table. We
|
||
will fill in the contents of the procedure linkage table later,
|
||
when we know the address of the .got section. */
|
||
if (h->type == STT_FUNC
|
||
|| h->needs_plt)
|
||
{
|
||
if (h->plt.refcount <= 0
|
||
|| SYMBOL_CALLS_LOCAL (info, h)
|
||
|| (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
|
||
&& h->root.type == bfd_link_hash_undefweak))
|
||
{
|
||
/* This case can occur if we saw a PLT reloc in an input
|
||
file, but the symbol was never referred to by a dynamic
|
||
object, or if all references were garbage collected. In
|
||
such a case, we don't actually need to build a procedure
|
||
linkage table, and we can just do a PC32 reloc instead. */
|
||
h->plt.offset = (bfd_vma) -1;
|
||
h->needs_plt = 0;
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
else
|
||
/* It's possible that we incorrectly decided a .plt reloc was
|
||
needed for an R_MICROBLAZE_64_PCREL reloc to a non-function sym in
|
||
check_relocs. We can't decide accurately between function and
|
||
non-function syms in check-relocs; Objects loaded later in
|
||
the link may change h->type. So fix it now. */
|
||
h->plt.offset = (bfd_vma) -1;
|
||
|
||
/* If this is a weak symbol, and there is a real definition, the
|
||
processor independent code will have arranged for us to see the
|
||
real definition first, and we can just use the same value. */
|
||
if (h->u.weakdef != NULL)
|
||
{
|
||
BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
|
||
|| h->u.weakdef->root.type == bfd_link_hash_defweak);
|
||
h->root.u.def.section = h->u.weakdef->root.u.def.section;
|
||
h->root.u.def.value = h->u.weakdef->root.u.def.value;
|
||
return TRUE;
|
||
}
|
||
|
||
/* This is a reference to a symbol defined by a dynamic object which
|
||
is not a function. */
|
||
|
||
/* If we are creating a shared library, we must presume that the
|
||
only references to the symbol are via the global offset table.
|
||
For such cases we need not do anything here; the relocations will
|
||
be handled correctly by relocate_section. */
|
||
if (info->shared)
|
||
return TRUE;
|
||
|
||
/* If there are no references to this symbol that do not use the
|
||
GOT, we don't need to generate a copy reloc. */
|
||
if (!h->non_got_ref)
|
||
return TRUE;
|
||
|
||
/* If -z nocopyreloc was given, we won't generate them either. */
|
||
if (info->nocopyreloc)
|
||
{
|
||
h->non_got_ref = 0;
|
||
return TRUE;
|
||
}
|
||
|
||
eh = (struct elf32_mb_link_hash_entry *) h;
|
||
for (p = eh->dyn_relocs; p != NULL; p = p->next)
|
||
{
|
||
s = p->sec->output_section;
|
||
if (s != NULL && (s->flags & SEC_READONLY) != 0)
|
||
break;
|
||
}
|
||
|
||
/* If we didn't find any dynamic relocs in read-only sections, then
|
||
we'll be keeping the dynamic relocs and avoiding the copy reloc. */
|
||
if (p == NULL)
|
||
{
|
||
h->non_got_ref = 0;
|
||
return TRUE;
|
||
}
|
||
|
||
/* We must allocate the symbol in our .dynbss section, which will
|
||
become part of the .bss section of the executable. There will be
|
||
an entry for this symbol in the .dynsym section. The dynamic
|
||
object will contain position independent code, so all references
|
||
from the dynamic object to this symbol will go through the global
|
||
offset table. The dynamic linker will use the .dynsym entry to
|
||
determine the address it must put in the global offset table, so
|
||
both the dynamic object and the regular object will refer to the
|
||
same memory location for the variable. */
|
||
|
||
/* We must generate a R_MICROBLAZE_COPY reloc to tell the dynamic linker
|
||
to copy the initial value out of the dynamic object and into the
|
||
runtime process image. */
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
BFD_ASSERT (dynobj != NULL);
|
||
if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
|
||
{
|
||
htab->srelbss->size += sizeof (Elf32_External_Rela);
|
||
h->needs_copy = 1;
|
||
}
|
||
|
||
/* We need to figure out the alignment required for this symbol. I
|
||
have no idea how ELF linkers handle this. */
|
||
power_of_two = bfd_log2 (h->size);
|
||
if (power_of_two > 3)
|
||
power_of_two = 3;
|
||
|
||
sdynbss = htab->sdynbss;
|
||
/* Apply the required alignment. */
|
||
sdynbss->size = BFD_ALIGN (sdynbss->size, (bfd_size_type) (1 << power_of_two));
|
||
if (power_of_two > bfd_get_section_alignment (dynobj, sdynbss))
|
||
{
|
||
if (! bfd_set_section_alignment (dynobj, sdynbss, power_of_two))
|
||
return FALSE;
|
||
}
|
||
|
||
/* Define the symbol as being at this point in the section. */
|
||
h->root.u.def.section = sdynbss;
|
||
h->root.u.def.value = sdynbss->size;
|
||
|
||
/* Increment the section size to make room for the symbol. */
|
||
sdynbss->size += h->size;
|
||
return TRUE;
|
||
}
|
||
|
||
/* Allocate space in .plt, .got and associated reloc sections for
|
||
dynamic relocs. */
|
||
|
||
static bfd_boolean
|
||
allocate_dynrelocs (struct elf_link_hash_entry *h, void * dat)
|
||
{
|
||
struct bfd_link_info *info;
|
||
struct elf32_mb_link_hash_table *htab;
|
||
struct elf32_mb_link_hash_entry *eh;
|
||
struct elf32_mb_dyn_relocs *p;
|
||
|
||
if (h->root.type == bfd_link_hash_indirect)
|
||
return TRUE;
|
||
|
||
if (h->root.type == bfd_link_hash_warning)
|
||
/* When warning symbols are created, they **replace** the "real"
|
||
entry in the hash table, thus we never get to see the real
|
||
symbol in a hash traversal. So look at it now. */
|
||
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
||
|
||
info = (struct bfd_link_info *) dat;
|
||
htab = elf32_mb_hash_table (info);
|
||
|
||
if (htab->elf.dynamic_sections_created
|
||
&& h->plt.refcount > 0)
|
||
{
|
||
/* Make sure this symbol is output as a dynamic symbol.
|
||
Undefined weak syms won't yet be marked as dynamic. */
|
||
if (h->dynindx == -1
|
||
&& !h->forced_local)
|
||
{
|
||
if (! bfd_elf_link_record_dynamic_symbol (info, h))
|
||
return FALSE;
|
||
}
|
||
|
||
if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
|
||
{
|
||
asection *s = htab->splt;
|
||
|
||
/* The first entry in .plt is reserved. */
|
||
if (s->size == 0)
|
||
s->size = PLT_ENTRY_SIZE;
|
||
|
||
h->plt.offset = s->size;
|
||
|
||
/* If this symbol is not defined in a regular file, and we are
|
||
not generating a shared library, then set the symbol to this
|
||
location in the .plt. This is required to make function
|
||
pointers compare as equal between the normal executable and
|
||
the shared library. */
|
||
if (! info->shared
|
||
&& !h->def_regular)
|
||
{
|
||
h->root.u.def.section = s;
|
||
h->root.u.def.value = h->plt.offset;
|
||
}
|
||
|
||
/* Make room for this entry. */
|
||
s->size += PLT_ENTRY_SIZE;
|
||
|
||
/* We also need to make an entry in the .got.plt section, which
|
||
will be placed in the .got section by the linker script. */
|
||
htab->sgotplt->size += 4;
|
||
|
||
/* We also need to make an entry in the .rel.plt section. */
|
||
htab->srelplt->size += sizeof (Elf32_External_Rela);
|
||
}
|
||
else
|
||
{
|
||
h->plt.offset = (bfd_vma) -1;
|
||
h->needs_plt = 0;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
h->plt.offset = (bfd_vma) -1;
|
||
h->needs_plt = 0;
|
||
}
|
||
|
||
if (h->got.refcount > 0)
|
||
{
|
||
asection *s;
|
||
|
||
/* Make sure this symbol is output as a dynamic symbol.
|
||
Undefined weak syms won't yet be marked as dynamic. */
|
||
if (h->dynindx == -1
|
||
&& !h->forced_local)
|
||
{
|
||
if (! bfd_elf_link_record_dynamic_symbol (info, h))
|
||
return FALSE;
|
||
}
|
||
|
||
s = htab->sgot;
|
||
h->got.offset = s->size;
|
||
s->size += 4;
|
||
htab->srelgot->size += sizeof (Elf32_External_Rela);
|
||
}
|
||
else
|
||
h->got.offset = (bfd_vma) -1;
|
||
|
||
eh = (struct elf32_mb_link_hash_entry *) h;
|
||
if (eh->dyn_relocs == NULL)
|
||
return TRUE;
|
||
|
||
/* In the shared -Bsymbolic case, discard space allocated for
|
||
dynamic pc-relative relocs against symbols which turn out to be
|
||
defined in regular objects. For the normal shared case, discard
|
||
space for pc-relative relocs that have become local due to symbol
|
||
visibility changes. */
|
||
|
||
if (info->shared)
|
||
{
|
||
if (h->def_regular
|
||
&& (h->forced_local
|
||
|| info->symbolic))
|
||
{
|
||
struct elf32_mb_dyn_relocs **pp;
|
||
|
||
for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
|
||
{
|
||
p->count -= p->pc_count;
|
||
p->pc_count = 0;
|
||
if (p->count == 0)
|
||
*pp = p->next;
|
||
else
|
||
pp = &p->next;
|
||
}
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* For the non-shared case, discard space for relocs against
|
||
symbols which turn out to need copy relocs or are not
|
||
dynamic. */
|
||
|
||
if (!h->non_got_ref
|
||
&& ((h->def_dynamic
|
||
&& !h->def_regular)
|
||
|| (htab->elf.dynamic_sections_created
|
||
&& (h->root.type == bfd_link_hash_undefweak
|
||
|| h->root.type == bfd_link_hash_undefined))))
|
||
{
|
||
/* Make sure this symbol is output as a dynamic symbol.
|
||
Undefined weak syms won't yet be marked as dynamic. */
|
||
if (h->dynindx == -1
|
||
&& !h->forced_local)
|
||
{
|
||
if (! bfd_elf_link_record_dynamic_symbol (info, h))
|
||
return FALSE;
|
||
}
|
||
|
||
/* If that succeeded, we know we'll be keeping all the
|
||
relocs. */
|
||
if (h->dynindx != -1)
|
||
goto keep;
|
||
}
|
||
|
||
eh->dyn_relocs = NULL;
|
||
|
||
keep: ;
|
||
}
|
||
|
||
/* Finally, allocate space. */
|
||
for (p = eh->dyn_relocs; p != NULL; p = p->next)
|
||
{
|
||
asection *sreloc = elf_section_data (p->sec)->sreloc;
|
||
sreloc->size += p->count * sizeof (Elf32_External_Rela);
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Set the sizes of the dynamic sections. */
|
||
|
||
static bfd_boolean
|
||
microblaze_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
|
||
struct bfd_link_info *info)
|
||
{
|
||
struct elf32_mb_link_hash_table *htab;
|
||
bfd *dynobj;
|
||
asection *s;
|
||
bfd *ibfd;
|
||
|
||
htab = elf32_mb_hash_table (info);
|
||
dynobj = htab->elf.dynobj;
|
||
BFD_ASSERT (dynobj != NULL);
|
||
|
||
/* Set up .got offsets for local syms, and space for local dynamic
|
||
relocs. */
|
||
for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
|
||
{
|
||
bfd_signed_vma *local_got;
|
||
bfd_signed_vma *end_local_got;
|
||
bfd_size_type locsymcount;
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
asection *srel;
|
||
|
||
if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
|
||
continue;
|
||
|
||
for (s = ibfd->sections; s != NULL; s = s->next)
|
||
{
|
||
struct elf32_mb_dyn_relocs *p;
|
||
|
||
for (p = ((struct elf32_mb_dyn_relocs *)
|
||
elf_section_data (s)->local_dynrel);
|
||
p != NULL;
|
||
p = p->next)
|
||
{
|
||
if (!bfd_is_abs_section (p->sec)
|
||
&& bfd_is_abs_section (p->sec->output_section))
|
||
{
|
||
/* Input section has been discarded, either because
|
||
it is a copy of a linkonce section or due to
|
||
linker script /DISCARD/, so we'll be discarding
|
||
the relocs too. */
|
||
}
|
||
else if (p->count != 0)
|
||
{
|
||
srel = elf_section_data (p->sec)->sreloc;
|
||
srel->size += p->count * sizeof (Elf32_External_Rela);
|
||
if ((p->sec->output_section->flags & SEC_READONLY) != 0)
|
||
info->flags |= DF_TEXTREL;
|
||
}
|
||
}
|
||
}
|
||
|
||
local_got = elf_local_got_refcounts (ibfd);
|
||
if (!local_got)
|
||
continue;
|
||
|
||
symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
|
||
locsymcount = symtab_hdr->sh_info;
|
||
end_local_got = local_got + locsymcount;
|
||
s = htab->sgot;
|
||
srel = htab->srelgot;
|
||
|
||
for (; local_got < end_local_got; ++local_got)
|
||
{
|
||
if (*local_got > 0)
|
||
{
|
||
*local_got = s->size;
|
||
s->size += 4;
|
||
if (info->shared)
|
||
srel->size += sizeof (Elf32_External_Rela);
|
||
}
|
||
else
|
||
*local_got = (bfd_vma) -1;
|
||
}
|
||
}
|
||
|
||
/* Allocate global sym .plt and .got entries, and space for global
|
||
sym dynamic relocs. */
|
||
elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
|
||
|
||
if (elf_hash_table (info)->dynamic_sections_created)
|
||
{
|
||
/* Make space for the trailing nop in .plt. */
|
||
if (htab->splt->size > 0)
|
||
htab->splt->size += 4;
|
||
}
|
||
|
||
/* The check_relocs and adjust_dynamic_symbol entry points have
|
||
determined the sizes of the various dynamic sections. Allocate
|
||
memory for them. */
|
||
for (s = dynobj->sections; s != NULL; s = s->next)
|
||
{
|
||
const char *name;
|
||
bfd_boolean strip = FALSE;
|
||
|
||
if ((s->flags & SEC_LINKER_CREATED) == 0)
|
||
continue;
|
||
|
||
/* It's OK to base decisions on the section name, because none
|
||
of the dynobj section names depend upon the input files. */
|
||
name = bfd_get_section_name (dynobj, s);
|
||
|
||
if (strncmp (name, ".rela", 5) == 0)
|
||
{
|
||
if (s->size == 0)
|
||
{
|
||
/* If we don't need this section, strip it from the
|
||
output file. This is to handle .rela.bss and
|
||
.rela.plt. We must create it in
|
||
create_dynamic_sections, because it must be created
|
||
before the linker maps input sections to output
|
||
sections. The linker does that before
|
||
adjust_dynamic_symbol is called, and it is that
|
||
function which decides whether anything needs to go
|
||
into these sections. */
|
||
strip = TRUE;
|
||
}
|
||
else
|
||
{
|
||
/* We use the reloc_count field as a counter if we need
|
||
to copy relocs into the output file. */
|
||
s->reloc_count = 0;
|
||
}
|
||
}
|
||
else if (s != htab->splt && s != htab->sgot && s != htab->sgotplt)
|
||
{
|
||
/* It's not one of our sections, so don't allocate space. */
|
||
continue;
|
||
}
|
||
|
||
if (strip)
|
||
{
|
||
s->flags |= SEC_EXCLUDE;
|
||
continue;
|
||
}
|
||
|
||
/* Allocate memory for the section contents. */
|
||
/* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
|
||
Unused entries should be reclaimed before the section's contents
|
||
are written out, but at the moment this does not happen. Thus in
|
||
order to prevent writing out garbage, we initialise the section's
|
||
contents to zero. */
|
||
s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
|
||
if (s->contents == NULL && s->size != 0)
|
||
return FALSE;
|
||
}
|
||
|
||
if (elf_hash_table (info)->dynamic_sections_created)
|
||
{
|
||
/* Add some entries to the .dynamic section. We fill in the
|
||
values later, in microblaze_elf_finish_dynamic_sections, but we
|
||
must add the entries now so that we get the correct size for
|
||
the .dynamic section. The DT_DEBUG entry is filled in by the
|
||
dynamic linker and used by the debugger. */
|
||
#define add_dynamic_entry(TAG, VAL) \
|
||
_bfd_elf_add_dynamic_entry (info, TAG, VAL)
|
||
|
||
if (info->executable)
|
||
{
|
||
if (!add_dynamic_entry (DT_DEBUG, 0))
|
||
return FALSE;
|
||
}
|
||
|
||
if (!add_dynamic_entry (DT_RELA, 0)
|
||
|| !add_dynamic_entry (DT_RELASZ, 0)
|
||
|| !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
|
||
return FALSE;
|
||
|
||
if (htab->splt->size != 0)
|
||
{
|
||
if (!add_dynamic_entry (DT_PLTGOT, 0)
|
||
|| !add_dynamic_entry (DT_PLTRELSZ, 0)
|
||
|| !add_dynamic_entry (DT_PLTREL, DT_RELA)
|
||
|| !add_dynamic_entry (DT_JMPREL, 0)
|
||
|| !add_dynamic_entry (DT_BIND_NOW, 1))
|
||
return FALSE;
|
||
}
|
||
|
||
if (info->flags & DF_TEXTREL)
|
||
{
|
||
if (!add_dynamic_entry (DT_TEXTREL, 0))
|
||
return FALSE;
|
||
}
|
||
}
|
||
#undef add_dynamic_entry
|
||
return TRUE;
|
||
}
|
||
|
||
/* Finish up dynamic symbol handling. We set the contents of various
|
||
dynamic sections here. */
|
||
|
||
static bfd_boolean
|
||
microblaze_elf_finish_dynamic_symbol (bfd *output_bfd,
|
||
struct bfd_link_info *info,
|
||
struct elf_link_hash_entry *h,
|
||
Elf_Internal_Sym *sym)
|
||
{
|
||
bfd *dynobj;
|
||
struct elf32_mb_link_hash_table *htab;
|
||
|
||
htab = elf32_mb_hash_table (info);
|
||
dynobj = htab->elf.dynobj;
|
||
|
||
if (h->plt.offset != (bfd_vma) -1)
|
||
{
|
||
asection *splt;
|
||
asection *srela;
|
||
asection *sgotplt;
|
||
Elf_Internal_Rela rela;
|
||
bfd_byte *loc;
|
||
bfd_vma plt_index;
|
||
bfd_vma got_offset;
|
||
bfd_vma got_addr;
|
||
|
||
/* This symbol has an entry in the procedure linkage table. Set
|
||
it up. */
|
||
BFD_ASSERT (h->dynindx != -1);
|
||
|
||
splt = htab->splt;
|
||
srela = htab->srelplt;
|
||
sgotplt = htab->sgotplt;
|
||
BFD_ASSERT (splt != NULL && srela != NULL && sgotplt != NULL);
|
||
|
||
plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; /* first entry reserved. */
|
||
got_offset = (plt_index + 3) * 4; /* 3 reserved ??? */
|
||
got_addr = got_offset;
|
||
|
||
/* For non-PIC objects we need absolute address of the GOT entry. */
|
||
if (!info->shared)
|
||
got_addr += htab->sgotplt->output_section->vma + sgotplt->output_offset;
|
||
|
||
/* Fill in the entry in the procedure linkage table. */
|
||
bfd_put_32 (output_bfd, PLT_ENTRY_WORD_0 + ((got_addr >> 16) & 0xffff),
|
||
splt->contents + h->plt.offset);
|
||
if (info->shared)
|
||
bfd_put_32 (output_bfd, PLT_ENTRY_WORD_1 + (got_addr & 0xffff),
|
||
splt->contents + h->plt.offset + 4);
|
||
else
|
||
bfd_put_32 (output_bfd, PLT_ENTRY_WORD_1_NOPIC + (got_addr & 0xffff),
|
||
splt->contents + h->plt.offset + 4);
|
||
bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD_2,
|
||
splt->contents + h->plt.offset + 8);
|
||
bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD_3,
|
||
splt->contents + h->plt.offset + 12);
|
||
|
||
/* Any additions to the .got section??? */
|
||
/* bfd_put_32 (output_bfd,
|
||
splt->output_section->vma + splt->output_offset + h->plt.offset + 4,
|
||
sgotplt->contents + got_offset); */
|
||
|
||
/* Fill in the entry in the .rela.plt section. */
|
||
rela.r_offset = (sgotplt->output_section->vma
|
||
+ sgotplt->output_offset
|
||
+ got_offset);
|
||
rela.r_info = ELF32_R_INFO (h->dynindx, R_MICROBLAZE_JUMP_SLOT);
|
||
rela.r_addend = 0;
|
||
loc = srela->contents;
|
||
loc += plt_index * sizeof (Elf32_External_Rela);
|
||
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
|
||
|
||
if (!h->def_regular)
|
||
{
|
||
/* Mark the symbol as undefined, rather than as defined in
|
||
the .plt section. Zero the value. */
|
||
sym->st_shndx = SHN_UNDEF;
|
||
sym->st_value = 0;
|
||
}
|
||
}
|
||
|
||
if (h->got.offset != (bfd_vma) -1)
|
||
{
|
||
asection *sgot;
|
||
asection *srela;
|
||
Elf_Internal_Rela rela;
|
||
bfd_byte *loc;
|
||
|
||
/* This symbol has an entry in the global offset table. Set it
|
||
up. */
|
||
|
||
sgot = htab->sgot;
|
||
srela = htab->srelgot;
|
||
BFD_ASSERT (sgot != NULL && srela != NULL);
|
||
|
||
rela.r_offset = (sgot->output_section->vma
|
||
+ sgot->output_offset
|
||
+ (h->got.offset &~ (bfd_vma) 1));
|
||
|
||
/* If this is a -Bsymbolic link, and the symbol is defined
|
||
locally, we just want to emit a RELATIVE reloc. Likewise if
|
||
the symbol was forced to be local because of a version file.
|
||
The entry in the global offset table will already have been
|
||
initialized in the relocate_section function. */
|
||
if (info->shared
|
||
&& (info->symbolic || h->dynindx == -1)
|
||
&& h->def_regular)
|
||
{
|
||
asection *sec = h->root.u.def.section;
|
||
rela.r_info = ELF32_R_INFO (0, R_MICROBLAZE_REL);
|
||
rela.r_addend = (h->root.u.def.value
|
||
+ sec->output_section->vma
|
||
+ sec->output_offset);
|
||
}
|
||
else
|
||
{
|
||
rela.r_info = ELF32_R_INFO (h->dynindx, R_MICROBLAZE_GLOB_DAT);
|
||
rela.r_addend = 0;
|
||
}
|
||
|
||
bfd_put_32 (output_bfd, (bfd_vma) 0,
|
||
sgot->contents + (h->got.offset &~ (bfd_vma) 1));
|
||
loc = srela->contents;
|
||
loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
|
||
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
|
||
}
|
||
|
||
if (h->needs_copy)
|
||
{
|
||
asection *s;
|
||
Elf_Internal_Rela rela;
|
||
bfd_byte *loc;
|
||
|
||
/* This symbols needs a copy reloc. Set it up. */
|
||
|
||
BFD_ASSERT (h->dynindx != -1);
|
||
|
||
s = bfd_get_section_by_name (h->root.u.def.section->owner,
|
||
".rela.bss");
|
||
BFD_ASSERT (s != NULL);
|
||
|
||
rela.r_offset = (h->root.u.def.value
|
||
+ h->root.u.def.section->output_section->vma
|
||
+ h->root.u.def.section->output_offset);
|
||
rela.r_info = ELF32_R_INFO (h->dynindx, R_MICROBLAZE_COPY);
|
||
rela.r_addend = 0;
|
||
loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
|
||
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
|
||
}
|
||
|
||
/* Mark some specially defined symbols as absolute. */
|
||
if (strcmp (h->root.root.string, "_DYNAMIC") == 0
|
||
|| strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
|
||
|| strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
|
||
sym->st_shndx = SHN_ABS;
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
|
||
/* Finish up the dynamic sections. */
|
||
|
||
static bfd_boolean
|
||
microblaze_elf_finish_dynamic_sections (bfd *output_bfd,
|
||
struct bfd_link_info *info)
|
||
{
|
||
bfd *dynobj;
|
||
asection *sdyn, *sgot;
|
||
struct elf32_mb_link_hash_table *htab;
|
||
|
||
htab = elf32_mb_hash_table (info);
|
||
dynobj = htab->elf.dynobj;
|
||
|
||
sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
|
||
|
||
if (htab->elf.dynamic_sections_created)
|
||
{
|
||
asection *splt;
|
||
Elf32_External_Dyn *dyncon, *dynconend;
|
||
|
||
splt = bfd_get_section_by_name (dynobj, ".plt");
|
||
BFD_ASSERT (splt != NULL && sdyn != NULL);
|
||
|
||
dyncon = (Elf32_External_Dyn *) sdyn->contents;
|
||
dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
|
||
for (; dyncon < dynconend; dyncon++)
|
||
{
|
||
Elf_Internal_Dyn dyn;
|
||
const char *name;
|
||
bfd_boolean size;
|
||
|
||
bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
|
||
|
||
switch (dyn.d_tag)
|
||
{
|
||
case DT_PLTGOT: name = ".got.plt"; size = FALSE; break;
|
||
case DT_PLTRELSZ: name = ".rela.plt"; size = TRUE; break;
|
||
case DT_JMPREL: name = ".rela.plt"; size = FALSE; break;
|
||
case DT_RELA: name = ".rela.dyn"; size = FALSE; break;
|
||
case DT_RELASZ: name = ".rela.dyn"; size = TRUE; break;
|
||
default: name = NULL; size = FALSE; break;
|
||
}
|
||
|
||
if (name != NULL)
|
||
{
|
||
asection *s;
|
||
|
||
s = bfd_get_section_by_name (output_bfd, name);
|
||
if (s == NULL)
|
||
dyn.d_un.d_val = 0;
|
||
else
|
||
{
|
||
if (! size)
|
||
dyn.d_un.d_ptr = s->vma;
|
||
else
|
||
dyn.d_un.d_val = s->size;
|
||
}
|
||
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
||
}
|
||
}
|
||
|
||
/* Clear the first entry in the procedure linkage table,
|
||
and put a nop in the last four bytes. */
|
||
if (splt->size > 0)
|
||
{
|
||
memset (splt->contents, 0, PLT_ENTRY_SIZE);
|
||
bfd_put_32 (output_bfd, (bfd_vma) 0x80000000 /* nop. */,
|
||
splt->contents + splt->size - 4);
|
||
}
|
||
|
||
elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
|
||
}
|
||
|
||
/* Set the first entry in the global offset table to the address of
|
||
the dynamic section. */
|
||
sgot = bfd_get_section_by_name (dynobj, ".got.plt");
|
||
if (sgot && sgot->size > 0)
|
||
{
|
||
if (sdyn == NULL)
|
||
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
|
||
else
|
||
bfd_put_32 (output_bfd,
|
||
sdyn->output_section->vma + sdyn->output_offset,
|
||
sgot->contents);
|
||
elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
|
||
}
|
||
|
||
if (htab->sgot && htab->sgot->size > 0)
|
||
elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 4;
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Hook called by the linker routine which adds symbols from an object
|
||
file. We use it to put .comm items in .sbss, and not .bss. */
|
||
|
||
static bfd_boolean
|
||
microblaze_elf_add_symbol_hook (bfd *abfd,
|
||
struct bfd_link_info *info,
|
||
Elf_Internal_Sym *sym,
|
||
const char **namep ATTRIBUTE_UNUSED,
|
||
flagword *flagsp ATTRIBUTE_UNUSED,
|
||
asection **secp,
|
||
bfd_vma *valp)
|
||
{
|
||
if (sym->st_shndx == SHN_COMMON
|
||
&& !info->relocatable
|
||
&& sym->st_size <= elf_gp_size (abfd))
|
||
{
|
||
/* Common symbols less than or equal to -G nn bytes are automatically
|
||
put into .sbss. */
|
||
*secp = bfd_make_section_anyway (abfd, ".sbss");
|
||
if (*secp == NULL
|
||
|| ! bfd_set_section_flags (abfd, *secp, SEC_IS_COMMON))
|
||
return FALSE;
|
||
|
||
*valp = sym->st_size;
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
|
||
#define TARGET_BIG_SYM bfd_elf32_microblaze_vec
|
||
#define TARGET_BIG_NAME "elf32-microblaze"
|
||
|
||
#define ELF_ARCH bfd_arch_microblaze
|
||
#define ELF_MACHINE_CODE EM_MICROBLAZE
|
||
#define ELF_MACHINE_ALT1 EM_MICROBLAZE_OLD
|
||
#define ELF_MAXPAGESIZE 0x4 /* 4k, if we ever have 'em. */
|
||
#define elf_info_to_howto microblaze_elf_info_to_howto
|
||
#define elf_info_to_howto_rel NULL
|
||
|
||
#define bfd_elf32_bfd_reloc_type_lookup microblaze_elf_reloc_type_lookup
|
||
#define bfd_elf32_bfd_is_local_label_name microblaze_elf_is_local_label_name
|
||
#define elf_backend_relocate_section microblaze_elf_relocate_section
|
||
#define bfd_elf32_bfd_relax_section microblaze_elf_relax_section
|
||
#define bfd_elf32_bfd_reloc_name_lookup microblaze_elf_reloc_name_lookup
|
||
|
||
#define elf_backend_gc_mark_hook microblaze_elf_gc_mark_hook
|
||
#define elf_backend_gc_sweep_hook microblaze_elf_gc_sweep_hook
|
||
#define elf_backend_check_relocs microblaze_elf_check_relocs
|
||
#define elf_backend_copy_indirect_symbol microblaze_elf_copy_indirect_symbol
|
||
#define bfd_elf32_bfd_link_hash_table_create microblaze_elf_link_hash_table_create
|
||
#define elf_backend_can_gc_sections 1
|
||
#define elf_backend_can_refcount 1
|
||
#define elf_backend_want_got_plt 1
|
||
#define elf_backend_plt_readonly 1
|
||
#define elf_backend_got_header_size 12
|
||
#define elf_backend_rela_normal 1
|
||
|
||
#define elf_backend_adjust_dynamic_symbol microblaze_elf_adjust_dynamic_symbol
|
||
#define elf_backend_create_dynamic_sections microblaze_elf_create_dynamic_sections
|
||
#define elf_backend_finish_dynamic_sections microblaze_elf_finish_dynamic_sections
|
||
#define elf_backend_finish_dynamic_symbol microblaze_elf_finish_dynamic_symbol
|
||
#define elf_backend_size_dynamic_sections microblaze_elf_size_dynamic_sections
|
||
#define elf_backend_add_symbol_hook microblaze_elf_add_symbol_hook
|
||
|
||
#include "elf32-target.h"
|