mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-03 04:12:10 +08:00
24f13b0331
Clear contents field. (bfd_section_from_shdr): In SHT_STRTAB case, check bfd_section, not rawdata. Don't set rawdata if e_shstrndx. Use bfd_section rather than rawdata in commented out code. In SHT_REL[A] case, don't bother to check elf_section_data of section returned by section_from_elf_index. (elf_fake_sections): Set bfd_section, not rawdata. Don't set size. (elf_map_symbols): Don't set elf_num_section_syms. Don't create section symbols that already exist. (assign_file_position_for_section): Use bfd_section, not rawdata. (section_from_elf_index): Just check bfd_section field. (elf_section_from_bfd_section): Likewise. (elf_debug_section): Don't print rawdata, contents, or size. (elf_link_add_object_symbols): Don't error out if section_from_elf_index returns NULL. (elf_bfd_final_link): Check return value from section_from_elf_index against NULL, not bfd_is_abs_section. (elf_link_input_bfd): Don't check section_from_elf_index return value. * libelf.h (struct elf_obj_tdata): Remove num_section_syms field. (elf_num_section_syms): Don't define. * elf.c (elf_get_str_section): Store section contents in contents field rather than rawdata field. (elf_string_from_elf_section): Likewise. (_bfd_elf_make_section_from_shdr): Store BFD section pointer in bfd_section field rather than rawdata field. * elf32-hppa.c (elf32_hppa_read_symext_info): Use bfd_section rather than rawdata. (elf32_hppa_size_stubs): Likewise. * elf32-mips.c (mips_elf_final_write_processing): Use bfd_section rathern than rawdata. (mips_elf_section_from_shdr): Likewise. (mips_elf_section_processing): Likewise. (mips_elf_section_from_bfd_section): Remove rawdata check.
2469 lines
71 KiB
C
2469 lines
71 KiB
C
/* MIPS-specific support for 32-bit ELF
|
||
Copyright 1993, 1994 Free Software Foundation, Inc.
|
||
|
||
Most of the information added by Ian Lance Taylor, Cygnus Support,
|
||
<ian@cygnus.com>.
|
||
|
||
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 2 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
|
||
|
||
#include "bfd.h"
|
||
#include "sysdep.h"
|
||
#include "libbfd.h"
|
||
#include "bfdlink.h"
|
||
#include "genlink.h"
|
||
#include "libelf.h"
|
||
#include "elf/mips.h"
|
||
|
||
/* Get the ECOFF swapping routines. */
|
||
#include "coff/sym.h"
|
||
#include "coff/symconst.h"
|
||
#include "coff/internal.h"
|
||
#include "coff/ecoff.h"
|
||
#include "coff/mips.h"
|
||
#define ECOFF_32
|
||
#include "ecoffswap.h"
|
||
|
||
static bfd_reloc_status_type mips_elf_hi16_reloc PARAMS ((bfd *abfd,
|
||
arelent *reloc,
|
||
asymbol *symbol,
|
||
PTR data,
|
||
asection *section,
|
||
bfd *output_bfd,
|
||
char **error));
|
||
static bfd_reloc_status_type mips_elf_got16_reloc PARAMS ((bfd *abfd,
|
||
arelent *reloc,
|
||
asymbol *symbol,
|
||
PTR data,
|
||
asection *section,
|
||
bfd *output_bfd,
|
||
char **error));
|
||
static bfd_reloc_status_type mips_elf_lo16_reloc PARAMS ((bfd *abfd,
|
||
arelent *reloc,
|
||
asymbol *symbol,
|
||
PTR data,
|
||
asection *section,
|
||
bfd *output_bfd,
|
||
char **error));
|
||
static bfd_reloc_status_type mips_elf_gprel16_reloc PARAMS ((bfd *abfd,
|
||
arelent *reloc,
|
||
asymbol *symbol,
|
||
PTR data,
|
||
asection *section,
|
||
bfd *output_bfd,
|
||
char **error));
|
||
static const struct reloc_howto_struct *bfd_elf32_bfd_reloc_type_lookup
|
||
PARAMS ((bfd *, bfd_reloc_code_real_type));
|
||
static void mips_info_to_howto_rel
|
||
PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *));
|
||
static boolean mips_elf_sym_is_global PARAMS ((bfd *, asymbol *));
|
||
static boolean mips_elf_object_p PARAMS ((bfd *));
|
||
static void mips_elf_final_write_processing
|
||
PARAMS ((bfd *, boolean));
|
||
static boolean mips_elf_section_from_shdr
|
||
PARAMS ((bfd *, Elf32_Internal_Shdr *, char *));
|
||
static boolean mips_elf_fake_sections
|
||
PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *));
|
||
static boolean mips_elf_section_from_bfd_section
|
||
PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *, int *));
|
||
static boolean mips_elf_section_processing
|
||
PARAMS ((bfd *, Elf32_Internal_Shdr *));
|
||
static void mips_elf_symbol_processing PARAMS ((bfd *, asymbol *));
|
||
static boolean mips_elf_read_ecoff_info
|
||
PARAMS ((bfd *, asection *, struct ecoff_debug_info *));
|
||
static struct bfd_hash_entry *mips_elf_link_hash_newfunc
|
||
PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
|
||
static struct bfd_link_hash_table *mips_elf_link_hash_table_create
|
||
PARAMS ((bfd *));
|
||
static int gptab_compare PARAMS ((const void *, const void *));
|
||
static boolean mips_elf_final_link
|
||
PARAMS ((bfd *, struct bfd_link_info *));
|
||
static void mips_elf_relocate_hi16
|
||
PARAMS ((bfd *, Elf_Internal_Rela *, Elf_Internal_Rela *, bfd_byte *,
|
||
bfd_vma));
|
||
static boolean mips_elf_relocate_section
|
||
PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
|
||
Elf_Internal_Rela *, Elf_Internal_Sym *, asection **, char *));
|
||
static boolean mips_elf_add_symbol_hook
|
||
PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *,
|
||
const char **, flagword *, asection **, bfd_vma *));
|
||
|
||
#define USE_REL 1 /* MIPS uses REL relocations instead of RELA */
|
||
|
||
enum reloc_type
|
||
{
|
||
R_MIPS_NONE = 0,
|
||
R_MIPS_16, R_MIPS_32,
|
||
R_MIPS_REL32, R_MIPS_26,
|
||
R_MIPS_HI16, R_MIPS_LO16,
|
||
R_MIPS_GPREL16, R_MIPS_LITERAL,
|
||
R_MIPS_GOT16, R_MIPS_PC16,
|
||
R_MIPS_CALL16, R_MIPS_GPREL32,
|
||
R_MIPS_max
|
||
};
|
||
|
||
static reloc_howto_type elf_mips_howto_table[] =
|
||
{
|
||
/* No relocation. */
|
||
HOWTO (R_MIPS_NONE, /* type */
|
||
0, /* rightshift */
|
||
0, /* size (0 = byte, 1 = short, 2 = long) */
|
||
0, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_MIPS_NONE", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 16 bit relocation. */
|
||
HOWTO (R_MIPS_16, /* type */
|
||
0, /* rightshift */
|
||
1, /* 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_MIPS_16", /* name */
|
||
true, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 32 bit relocation. */
|
||
HOWTO (R_MIPS_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_MIPS_32", /* name */
|
||
true, /* partial_inplace */
|
||
0xffffffff, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 32 bit symbol relative relocation. */
|
||
HOWTO (R_MIPS_REL32, /* 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_MIPS_REL32", /* name */
|
||
true, /* partial_inplace */
|
||
0xffffffff, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 26 bit branch address. */
|
||
HOWTO (R_MIPS_26, /* type */
|
||
2, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
26, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
/* This needs complex overflow
|
||
detection, because the upper four
|
||
bits must match the PC. */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_MIPS_26", /* name */
|
||
true, /* partial_inplace */
|
||
0x3ffffff, /* src_mask */
|
||
0x3ffffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* High 16 bits of symbol value. */
|
||
HOWTO (R_MIPS_HI16, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
mips_elf_hi16_reloc, /* special_function */
|
||
"R_MIPS_HI16", /* name */
|
||
true, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Low 16 bits of symbol value. */
|
||
HOWTO (R_MIPS_LO16, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
mips_elf_lo16_reloc, /* special_function */
|
||
"R_MIPS_LO16", /* name */
|
||
true, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* GP relative reference. */
|
||
HOWTO (R_MIPS_GPREL16, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
mips_elf_gprel16_reloc, /* special_function */
|
||
"R_MIPS_GPREL16", /* name */
|
||
true, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Reference to literal section. */
|
||
HOWTO (R_MIPS_LITERAL, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
mips_elf_gprel16_reloc, /* special_function */
|
||
"R_MIPS_LITERAL", /* name */
|
||
true, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Reference to global offset table. */
|
||
/* FIXME: This is not handled correctly. */
|
||
HOWTO (R_MIPS_GOT16, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
mips_elf_got16_reloc, /* special_function */
|
||
"R_MIPS_GOT16", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 16 bit PC relative reference. */
|
||
HOWTO (R_MIPS_PC16, /* 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_MIPS_PC16", /* name */
|
||
true, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 16 bit call through global offset table. */
|
||
/* FIXME: This is not handled correctly. */
|
||
HOWTO (R_MIPS_CALL16, /* 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_MIPS_CALL16", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 32 bit GP relative reference. */
|
||
/* FIXME: This is not handled correctly. */
|
||
HOWTO (R_MIPS_GPREL32, /* 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_MIPS_GPREL32", /* name */
|
||
true, /* partial_inplace */
|
||
0xffffffff, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
false) /* pcrel_offset */
|
||
};
|
||
|
||
/* Do a R_MIPS_HI16 relocation. This has to be done in combination
|
||
with a R_MIPS_LO16 reloc, because there is a carry from the LO16 to
|
||
the HI16. Here we just save the information we need; we do the
|
||
actual relocation when we see the LO16. MIPS ELF requires that the
|
||
LO16 immediately follow the HI16, so this ought to work. */
|
||
|
||
static bfd_byte *mips_hi16_addr;
|
||
static bfd_vma mips_hi16_addend;
|
||
|
||
static bfd_reloc_status_type
|
||
mips_elf_hi16_reloc (abfd,
|
||
reloc_entry,
|
||
symbol,
|
||
data,
|
||
input_section,
|
||
output_bfd,
|
||
error_message)
|
||
bfd *abfd;
|
||
arelent *reloc_entry;
|
||
asymbol *symbol;
|
||
PTR data;
|
||
asection *input_section;
|
||
bfd *output_bfd;
|
||
char **error_message;
|
||
{
|
||
bfd_reloc_status_type ret;
|
||
bfd_vma relocation;
|
||
|
||
/* If we're relocating, and this an external symbol, we don't want
|
||
to change anything. */
|
||
if (output_bfd != (bfd *) NULL
|
||
&& (symbol->flags & BSF_SECTION_SYM) == 0
|
||
&& reloc_entry->addend == 0)
|
||
{
|
||
reloc_entry->address += input_section->output_offset;
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
/* FIXME: The symbol _gp_disp requires special handling, which we do
|
||
not do. */
|
||
if (strcmp (bfd_asymbol_name (symbol), "_gp_disp") == 0)
|
||
abort ();
|
||
|
||
ret = bfd_reloc_ok;
|
||
if (bfd_is_und_section (symbol->section)
|
||
&& output_bfd == (bfd *) NULL)
|
||
ret = bfd_reloc_undefined;
|
||
|
||
if (bfd_is_com_section (symbol->section))
|
||
relocation = 0;
|
||
else
|
||
relocation = symbol->value;
|
||
|
||
relocation += symbol->section->output_section->vma;
|
||
relocation += symbol->section->output_offset;
|
||
relocation += reloc_entry->addend;
|
||
|
||
if (reloc_entry->address > input_section->_cooked_size)
|
||
return bfd_reloc_outofrange;
|
||
|
||
/* Save the information, and let LO16 do the actual relocation. */
|
||
mips_hi16_addr = (bfd_byte *) data + reloc_entry->address;
|
||
mips_hi16_addend = relocation;
|
||
|
||
if (output_bfd != (bfd *) NULL)
|
||
reloc_entry->address += input_section->output_offset;
|
||
|
||
return ret;
|
||
}
|
||
|
||
/* Do a R_MIPS_LO16 relocation. This is a straightforward 16 bit
|
||
inplace relocation; this function exists in order to do the
|
||
R_MIPS_HI16 relocation described above. */
|
||
|
||
static bfd_reloc_status_type
|
||
mips_elf_lo16_reloc (abfd,
|
||
reloc_entry,
|
||
symbol,
|
||
data,
|
||
input_section,
|
||
output_bfd,
|
||
error_message)
|
||
bfd *abfd;
|
||
arelent *reloc_entry;
|
||
asymbol *symbol;
|
||
PTR data;
|
||
asection *input_section;
|
||
bfd *output_bfd;
|
||
char **error_message;
|
||
{
|
||
/* FIXME: The symbol _gp_disp requires special handling, which we do
|
||
not do. */
|
||
if (output_bfd == (bfd *) NULL
|
||
&& strcmp (bfd_asymbol_name (symbol), "_gp_disp") == 0)
|
||
abort ();
|
||
|
||
if (mips_hi16_addr != (bfd_byte *) NULL)
|
||
{
|
||
unsigned long insn;
|
||
unsigned long val;
|
||
unsigned long vallo;
|
||
|
||
/* Do the HI16 relocation. Note that we actually don't need to
|
||
know anything about the LO16 itself, except where to find the
|
||
low 16 bits of the addend needed by the LO16. */
|
||
insn = bfd_get_32 (abfd, mips_hi16_addr);
|
||
vallo = (bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address)
|
||
& 0xffff);
|
||
val = ((insn & 0xffff) << 16) + vallo;
|
||
val += mips_hi16_addend;
|
||
|
||
/* The low order 16 bits are always treated as a signed value.
|
||
Therefore, a negative value in the low order bits requires an
|
||
adjustment in the high order bits. We need to make this
|
||
adjustment in two ways: once for the bits we took from the
|
||
data, and once for the bits we are putting back in to the
|
||
data. */
|
||
if ((vallo & 0x8000) != 0)
|
||
val -= 0x10000;
|
||
if ((val & 0x8000) != 0)
|
||
val += 0x10000;
|
||
|
||
insn = (insn &~ 0xffff) | ((val >> 16) & 0xffff);
|
||
bfd_put_32 (abfd, insn, mips_hi16_addr);
|
||
|
||
mips_hi16_addr = (bfd_byte *) NULL;
|
||
}
|
||
|
||
/* Now do the LO16 reloc in the usual way. */
|
||
return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
|
||
input_section, output_bfd, error_message);
|
||
}
|
||
|
||
/* Do a R_MIPS_GOT16 reloc. This is a reloc against the global offset
|
||
table used for PIC code. If the symbol is an external symbol, the
|
||
instruction is modified to contain the offset of the appropriate
|
||
entry in the global offset table. If the symbol is a section
|
||
symbol, the next reloc is a R_MIPS_LO16 reloc. The two 16 bit
|
||
addends are combined to form the real addend against the section
|
||
symbol; the GOT16 is modified to contain the offset of an entry in
|
||
the global offset table, and the LO16 is modified to offset it
|
||
appropriately. Thus an offset larger than 16 bits requires a
|
||
modified value in the global offset table.
|
||
|
||
This implementation suffices for the assembler, but the linker does
|
||
not yet know how to create global offset tables. */
|
||
|
||
static bfd_reloc_status_type
|
||
mips_elf_got16_reloc (abfd,
|
||
reloc_entry,
|
||
symbol,
|
||
data,
|
||
input_section,
|
||
output_bfd,
|
||
error_message)
|
||
bfd *abfd;
|
||
arelent *reloc_entry;
|
||
asymbol *symbol;
|
||
PTR data;
|
||
asection *input_section;
|
||
bfd *output_bfd;
|
||
char **error_message;
|
||
{
|
||
/* If we're relocating, and this an external symbol, we don't want
|
||
to change anything. */
|
||
if (output_bfd != (bfd *) NULL
|
||
&& (symbol->flags & BSF_SECTION_SYM) == 0
|
||
&& reloc_entry->addend == 0)
|
||
{
|
||
reloc_entry->address += input_section->output_offset;
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
/* If we're relocating, and this is a local symbol, we can handle it
|
||
just like HI16. */
|
||
if (output_bfd != (bfd *) NULL
|
||
&& (symbol->flags & BSF_SECTION_SYM) != 0)
|
||
return mips_elf_hi16_reloc (abfd, reloc_entry, symbol, data,
|
||
input_section, output_bfd, error_message);
|
||
|
||
abort ();
|
||
}
|
||
|
||
/* Do a R_MIPS_GPREL16 relocation. This is a 16 bit value which must
|
||
become the offset from the gp register. This function also handles
|
||
R_MIPS_LITERAL relocations, although those can be handled more
|
||
cleverly because the entries in the .lit8 and .lit4 sections can be
|
||
merged. */
|
||
|
||
static bfd_reloc_status_type
|
||
mips_elf_gprel16_reloc (abfd,
|
||
reloc_entry,
|
||
symbol,
|
||
data,
|
||
input_section,
|
||
output_bfd,
|
||
error_message)
|
||
bfd *abfd;
|
||
arelent *reloc_entry;
|
||
asymbol *symbol;
|
||
PTR data;
|
||
asection *input_section;
|
||
bfd *output_bfd;
|
||
char **error_message;
|
||
{
|
||
boolean relocateable;
|
||
bfd_vma relocation;
|
||
unsigned long val;
|
||
unsigned long insn;
|
||
|
||
/* If we're relocating, and this is an external symbol with no
|
||
addend, we don't want to change anything. We will only have an
|
||
addend if this is a newly created reloc, not read from an ELF
|
||
file. */
|
||
if (output_bfd != (bfd *) NULL
|
||
&& (symbol->flags & BSF_SECTION_SYM) == 0
|
||
&& reloc_entry->addend == 0)
|
||
{
|
||
reloc_entry->address += input_section->output_offset;
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
if (output_bfd != (bfd *) NULL)
|
||
relocateable = true;
|
||
else
|
||
{
|
||
relocateable = false;
|
||
output_bfd = symbol->section->output_section->owner;
|
||
}
|
||
|
||
if (bfd_is_und_section (symbol->section)
|
||
&& relocateable == false)
|
||
return bfd_reloc_undefined;
|
||
|
||
/* We have to figure out the gp value, so that we can adjust the
|
||
symbol value correctly. We look up the symbol _gp in the output
|
||
BFD. If we can't find it, we're stuck. We cache it in the ELF
|
||
target data. We don't need to adjust the symbol value for an
|
||
external symbol if we are producing relocateable output. */
|
||
if (elf_gp (output_bfd) == 0
|
||
&& (relocateable == false
|
||
|| (symbol->flags & BSF_SECTION_SYM) != 0))
|
||
{
|
||
if (relocateable != false)
|
||
{
|
||
/* Make up a value. */
|
||
elf_gp (output_bfd) =
|
||
symbol->section->output_section->vma + 0x4000;
|
||
}
|
||
else
|
||
{
|
||
unsigned int count;
|
||
asymbol **sym;
|
||
unsigned int i;
|
||
|
||
count = bfd_get_symcount (output_bfd);
|
||
sym = bfd_get_outsymbols (output_bfd);
|
||
|
||
if (sym == (asymbol **) NULL)
|
||
i = count;
|
||
else
|
||
{
|
||
for (i = 0; i < count; i++, sym++)
|
||
{
|
||
register CONST char *name;
|
||
|
||
name = bfd_asymbol_name (*sym);
|
||
if (*name == '_' && strcmp (name, "_gp") == 0)
|
||
{
|
||
elf_gp (output_bfd) = bfd_asymbol_value (*sym);
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
if (i >= count)
|
||
{
|
||
/* Only get the error once. */
|
||
elf_gp (output_bfd) = 4;
|
||
*error_message =
|
||
(char *) "GP relative relocation when _gp not defined";
|
||
return bfd_reloc_dangerous;
|
||
}
|
||
}
|
||
}
|
||
|
||
if (bfd_is_com_section (symbol->section))
|
||
relocation = 0;
|
||
else
|
||
relocation = symbol->value;
|
||
|
||
relocation += symbol->section->output_section->vma;
|
||
relocation += symbol->section->output_offset;
|
||
|
||
if (reloc_entry->address > input_section->_cooked_size)
|
||
return bfd_reloc_outofrange;
|
||
|
||
insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
|
||
|
||
/* Set val to the offset into the section or symbol. */
|
||
val = ((insn & 0xffff) + reloc_entry->addend) & 0xffff;
|
||
if (val & 0x8000)
|
||
val -= 0x10000;
|
||
|
||
/* Adjust val for the final section location and GP value. If we
|
||
are producing relocateable output, we don't want to do this for
|
||
an external symbol. */
|
||
if (relocateable == false
|
||
|| (symbol->flags & BSF_SECTION_SYM) != 0)
|
||
val += relocation - elf_gp (output_bfd);
|
||
|
||
insn = (insn &~ 0xffff) | (val & 0xffff);
|
||
bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
|
||
|
||
if (relocateable != false)
|
||
reloc_entry->address += input_section->output_offset;
|
||
|
||
/* Make sure it fit in 16 bits. */
|
||
if (val >= 0x8000 && val < 0xffff8000)
|
||
return bfd_reloc_overflow;
|
||
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
/* A mapping from BFD reloc types to MIPS ELF reloc types. */
|
||
|
||
struct elf_reloc_map {
|
||
bfd_reloc_code_real_type bfd_reloc_val;
|
||
enum reloc_type elf_reloc_val;
|
||
};
|
||
|
||
static CONST struct elf_reloc_map mips_reloc_map[] =
|
||
{
|
||
{ BFD_RELOC_NONE, R_MIPS_NONE, },
|
||
{ BFD_RELOC_16, R_MIPS_16 },
|
||
{ BFD_RELOC_32, R_MIPS_32 },
|
||
{ BFD_RELOC_CTOR, R_MIPS_32 },
|
||
{ BFD_RELOC_32_PCREL, R_MIPS_REL32 },
|
||
{ BFD_RELOC_MIPS_JMP, R_MIPS_26 },
|
||
{ BFD_RELOC_HI16_S, R_MIPS_HI16 },
|
||
{ BFD_RELOC_LO16, R_MIPS_LO16 },
|
||
{ BFD_RELOC_MIPS_GPREL, R_MIPS_GPREL16 },
|
||
{ BFD_RELOC_MIPS_LITERAL, R_MIPS_LITERAL },
|
||
{ BFD_RELOC_MIPS_GOT16, R_MIPS_GOT16 },
|
||
{ BFD_RELOC_16_PCREL, R_MIPS_PC16 },
|
||
{ BFD_RELOC_MIPS_CALL16, R_MIPS_CALL16 },
|
||
{ BFD_RELOC_MIPS_GPREL32, R_MIPS_GPREL32 }
|
||
};
|
||
|
||
/* Given a BFD reloc type, return a howto structure. */
|
||
|
||
static const struct reloc_howto_struct *
|
||
bfd_elf32_bfd_reloc_type_lookup (abfd, code)
|
||
bfd *abfd;
|
||
bfd_reloc_code_real_type code;
|
||
{
|
||
int i;
|
||
|
||
for (i = 0; i < sizeof (mips_reloc_map) / sizeof (struct elf_reloc_map); i++)
|
||
{
|
||
if (mips_reloc_map[i].bfd_reloc_val == code)
|
||
return &elf_mips_howto_table[(int) mips_reloc_map[i].elf_reloc_val];
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
/* Given a MIPS reloc type, fill in an arelent structure. */
|
||
|
||
static void
|
||
mips_info_to_howto_rel (abfd, cache_ptr, dst)
|
||
bfd *abfd;
|
||
arelent *cache_ptr;
|
||
Elf32_Internal_Rel *dst;
|
||
{
|
||
unsigned int r_type;
|
||
|
||
r_type = ELF32_R_TYPE (dst->r_info);
|
||
BFD_ASSERT (r_type < (unsigned int) R_MIPS_max);
|
||
cache_ptr->howto = &elf_mips_howto_table[r_type];
|
||
|
||
/* The addend for a GPREL16 or LITERAL relocation comes from the GP
|
||
value for the object file. We get the addend now, rather than
|
||
when we do the relocation, because the symbol manipulations done
|
||
by the linker may cause us to lose track of the input BFD. */
|
||
if (((*cache_ptr->sym_ptr_ptr)->flags & BSF_SECTION_SYM) != 0
|
||
&& (r_type == (unsigned int) R_MIPS_GPREL16
|
||
|| r_type == (unsigned int) R_MIPS_LITERAL))
|
||
cache_ptr->addend = elf_gp (abfd);
|
||
}
|
||
|
||
/* A .reginfo section holds a single Elf32_RegInfo structure. These
|
||
routines swap this structure in and out. They are used outside of
|
||
BFD, so they are globally visible. */
|
||
|
||
void
|
||
bfd_mips_elf32_swap_reginfo_in (abfd, ex, in)
|
||
bfd *abfd;
|
||
const Elf32_External_RegInfo *ex;
|
||
Elf32_RegInfo *in;
|
||
{
|
||
in->ri_gprmask = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_gprmask);
|
||
in->ri_cprmask[0] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[0]);
|
||
in->ri_cprmask[1] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[1]);
|
||
in->ri_cprmask[2] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[2]);
|
||
in->ri_cprmask[3] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[3]);
|
||
in->ri_gp_value = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_gp_value);
|
||
}
|
||
|
||
void
|
||
bfd_mips_elf32_swap_reginfo_out (abfd, in, ex)
|
||
bfd *abfd;
|
||
const Elf32_RegInfo *in;
|
||
Elf32_External_RegInfo *ex;
|
||
{
|
||
bfd_h_put_32 (abfd, (bfd_vma) in->ri_gprmask,
|
||
(bfd_byte *) ex->ri_gprmask);
|
||
bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[0],
|
||
(bfd_byte *) ex->ri_cprmask[0]);
|
||
bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[1],
|
||
(bfd_byte *) ex->ri_cprmask[1]);
|
||
bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[2],
|
||
(bfd_byte *) ex->ri_cprmask[2]);
|
||
bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[3],
|
||
(bfd_byte *) ex->ri_cprmask[3]);
|
||
bfd_h_put_32 (abfd, (bfd_vma) in->ri_gp_value,
|
||
(bfd_byte *) ex->ri_gp_value);
|
||
}
|
||
|
||
/* Swap an entry in a .gptab section. Note that these routines rely
|
||
on the equivalence of the two elements of the union. */
|
||
|
||
static void
|
||
bfd_mips_elf32_swap_gptab_in (abfd, ex, in)
|
||
bfd *abfd;
|
||
const Elf32_External_gptab *ex;
|
||
Elf32_gptab *in;
|
||
{
|
||
in->gt_entry.gt_g_value = bfd_h_get_32 (abfd, ex->gt_entry.gt_g_value);
|
||
in->gt_entry.gt_bytes = bfd_h_get_32 (abfd, ex->gt_entry.gt_bytes);
|
||
}
|
||
|
||
static void
|
||
bfd_mips_elf32_swap_gptab_out (abfd, in, ex)
|
||
bfd *abfd;
|
||
const Elf32_gptab *in;
|
||
Elf32_External_gptab *ex;
|
||
{
|
||
bfd_h_put_32 (abfd, (bfd_vma) in->gt_entry.gt_g_value,
|
||
ex->gt_entry.gt_g_value);
|
||
bfd_h_put_32 (abfd, (bfd_vma) in->gt_entry.gt_bytes,
|
||
ex->gt_entry.gt_bytes);
|
||
}
|
||
|
||
/* Determine whether a symbol is global for the purposes of splitting
|
||
the symbol table into global symbols and local symbols. At least
|
||
on Irix 5, this split must be between section symbols and all other
|
||
symbols. On most ELF targets the split is between static symbols
|
||
and externally visible symbols. */
|
||
|
||
/*ARGSUSED*/
|
||
static boolean
|
||
mips_elf_sym_is_global (abfd, sym)
|
||
bfd *abfd;
|
||
asymbol *sym;
|
||
{
|
||
return (sym->flags & BSF_SECTION_SYM) == 0 ? true : false;
|
||
}
|
||
|
||
/* Set the right machine number for a MIPS ELF file. */
|
||
|
||
static boolean
|
||
mips_elf_object_p (abfd)
|
||
bfd *abfd;
|
||
{
|
||
switch (elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH)
|
||
{
|
||
default:
|
||
case E_MIPS_ARCH_1:
|
||
/* Just use the default, which was set in elfcode.h. */
|
||
break;
|
||
|
||
case E_MIPS_ARCH_2:
|
||
(void) bfd_default_set_arch_mach (abfd, bfd_arch_mips, 6000);
|
||
break;
|
||
|
||
case E_MIPS_ARCH_3:
|
||
(void) bfd_default_set_arch_mach (abfd, bfd_arch_mips, 4000);
|
||
break;
|
||
}
|
||
|
||
/* Irix 5 is broken. Object file symbol tables are not always
|
||
sorted correctly such that local symbols precede global symbols,
|
||
and the sh_info field in the symbol table is not always right.
|
||
We try to quickly check whether the symbol table is broken for
|
||
this BFD, and, if it is, we set elf_bad_symtab in tdata. */
|
||
if (elf_onesymtab (abfd) != 0)
|
||
{
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
Elf32_External_Sym esym;
|
||
|
||
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
||
if (bfd_seek (abfd,
|
||
(symtab_hdr->sh_offset
|
||
+ symtab_hdr->sh_size
|
||
- sizeof (Elf32_External_Sym)),
|
||
SEEK_SET) != 0
|
||
|| (bfd_read ((PTR) &esym, 1, sizeof (Elf32_External_Sym), abfd)
|
||
!= sizeof (Elf32_External_Sym)))
|
||
return false;
|
||
if (ELF_ST_BIND (bfd_h_get_8 (abfd, (bfd_byte *) esym.st_info))
|
||
== STB_LOCAL)
|
||
elf_bad_symtab (abfd) = true;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* The final processing done just before writing out a MIPS ELF object
|
||
file. This gets the MIPS architecture right based on the machine
|
||
number. */
|
||
|
||
/*ARGSUSED*/
|
||
static void
|
||
mips_elf_final_write_processing (abfd, linker)
|
||
bfd *abfd;
|
||
boolean linker;
|
||
{
|
||
unsigned long val;
|
||
unsigned int i;
|
||
Elf_Internal_Shdr **hdrpp;
|
||
|
||
switch (bfd_get_mach (abfd))
|
||
{
|
||
case 3000:
|
||
val = E_MIPS_ARCH_1;
|
||
break;
|
||
|
||
case 6000:
|
||
val = E_MIPS_ARCH_2;
|
||
break;
|
||
|
||
case 4000:
|
||
val = E_MIPS_ARCH_3;
|
||
break;
|
||
|
||
default:
|
||
return;
|
||
}
|
||
|
||
elf_elfheader (abfd)->e_flags &=~ EF_MIPS_ARCH;
|
||
elf_elfheader (abfd)->e_flags |= val;
|
||
|
||
/* Set the sh_info field for .gptab sections. */
|
||
for (i = 1, hdrpp = elf_elfsections (abfd) + 1;
|
||
i < elf_elfheader (abfd)->e_shnum;
|
||
i++, hdrpp++)
|
||
{
|
||
if ((*hdrpp)->sh_type == SHT_MIPS_GPTAB)
|
||
{
|
||
const char *name;
|
||
asection *sec;
|
||
|
||
BFD_ASSERT ((*hdrpp)->bfd_section != NULL);
|
||
name = bfd_get_section_name (abfd, (*hdrpp)->bfd_section);
|
||
BFD_ASSERT (name != NULL
|
||
&& strncmp (name, ".gptab.", sizeof ".gptab." - 1) == 0);
|
||
sec = bfd_get_section_by_name (abfd, name + sizeof ".gptab" - 1);
|
||
BFD_ASSERT (sec != NULL);
|
||
(*hdrpp)->sh_info = elf_section_data (sec)->this_idx;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Handle a MIPS specific section when reading an object file. This
|
||
is called when elfcode.h finds a section with an unknown type.
|
||
FIXME: We need to handle the SHF_MIPS_GPREL flag, but I'm not sure
|
||
how to. */
|
||
|
||
static boolean
|
||
mips_elf_section_from_shdr (abfd, hdr, name)
|
||
bfd *abfd;
|
||
Elf32_Internal_Shdr *hdr;
|
||
char *name;
|
||
{
|
||
asection *newsect;
|
||
|
||
/* There ought to be a place to keep ELF backend specific flags, but
|
||
at the moment there isn't one. We just keep track of the
|
||
sections by their name, instead. Fortunately, the ABI gives
|
||
suggested names for all the MIPS specific sections, so we will
|
||
probably get away with this. */
|
||
switch (hdr->sh_type)
|
||
{
|
||
case SHT_MIPS_LIBLIST:
|
||
if (strcmp (name, ".liblist") != 0)
|
||
return false;
|
||
break;
|
||
case SHT_MIPS_CONFLICT:
|
||
if (strcmp (name, ".conflict") != 0)
|
||
return false;
|
||
break;
|
||
case SHT_MIPS_GPTAB:
|
||
if (strncmp (name, ".gptab.", sizeof ".gptab." - 1) != 0)
|
||
return false;
|
||
break;
|
||
case SHT_MIPS_UCODE:
|
||
if (strcmp (name, ".ucode") != 0)
|
||
return false;
|
||
break;
|
||
case SHT_MIPS_DEBUG:
|
||
if (strcmp (name, ".mdebug") != 0)
|
||
return false;
|
||
break;
|
||
case SHT_MIPS_REGINFO:
|
||
if (strcmp (name, ".reginfo") != 0
|
||
|| hdr->sh_size != sizeof (Elf32_External_RegInfo))
|
||
return false;
|
||
break;
|
||
case SHT_MIPS_OPTIONS:
|
||
if (strcmp (name, ".options") != 0)
|
||
return false;
|
||
break;
|
||
default:
|
||
return false;
|
||
}
|
||
|
||
if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
|
||
return false;
|
||
newsect = hdr->bfd_section;
|
||
|
||
if (hdr->sh_type == SHT_MIPS_DEBUG)
|
||
{
|
||
if (! bfd_set_section_flags (abfd, newsect,
|
||
(bfd_get_section_flags (abfd, newsect)
|
||
| SEC_DEBUGGING)))
|
||
return false;
|
||
}
|
||
|
||
/* FIXME: We should record sh_info for a .gptab section. */
|
||
|
||
/* For a .reginfo section, set the gp value in the tdata information
|
||
from the contents of this section. We need the gp value while
|
||
processing relocs, so we just get it now. */
|
||
if (hdr->sh_type == SHT_MIPS_REGINFO)
|
||
{
|
||
Elf32_External_RegInfo ext;
|
||
Elf32_RegInfo s;
|
||
|
||
if (! bfd_get_section_contents (abfd, newsect, (PTR) &ext,
|
||
(file_ptr) 0, sizeof ext))
|
||
return false;
|
||
bfd_mips_elf32_swap_reginfo_in (abfd, &ext, &s);
|
||
elf_gp (abfd) = s.ri_gp_value;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Set the correct type for a MIPS ELF section. We do this by the
|
||
section name, which is a hack, but ought to work. */
|
||
|
||
static boolean
|
||
mips_elf_fake_sections (abfd, hdr, sec)
|
||
bfd *abfd;
|
||
Elf32_Internal_Shdr *hdr;
|
||
asection *sec;
|
||
{
|
||
register const char *name;
|
||
|
||
name = bfd_get_section_name (abfd, sec);
|
||
|
||
if (strcmp (name, ".liblist") == 0)
|
||
{
|
||
hdr->sh_type = SHT_MIPS_LIBLIST;
|
||
hdr->sh_info = sec->_raw_size / sizeof (Elf32_Lib);
|
||
/* FIXME: Set the sh_link field. */
|
||
}
|
||
else if (strcmp (name, ".conflict") == 0)
|
||
hdr->sh_type = SHT_MIPS_CONFLICT;
|
||
else if (strncmp (name, ".gptab.", sizeof ".gptab." - 1) == 0)
|
||
{
|
||
hdr->sh_type = SHT_MIPS_GPTAB;
|
||
hdr->sh_entsize = sizeof (Elf32_External_gptab);
|
||
/* The sh_info field is set in mips_elf_final_write_processing. */
|
||
}
|
||
else if (strcmp (name, ".ucode") == 0)
|
||
hdr->sh_type = SHT_MIPS_UCODE;
|
||
else if (strcmp (name, ".mdebug") == 0)
|
||
{
|
||
hdr->sh_type = SHT_MIPS_DEBUG;
|
||
hdr->sh_entsize = 1;
|
||
}
|
||
else if (strcmp (name, ".reginfo") == 0)
|
||
{
|
||
hdr->sh_type = SHT_MIPS_REGINFO;
|
||
hdr->sh_entsize = 1;
|
||
|
||
/* Force the section size to the correct value, even if the
|
||
linker thinks it is larger. The link routine below will only
|
||
write out this much data for .reginfo. */
|
||
hdr->sh_size = sec->_raw_size = sizeof (Elf32_External_RegInfo);
|
||
}
|
||
else if (strcmp (name, ".options") == 0)
|
||
{
|
||
hdr->sh_type = SHT_MIPS_OPTIONS;
|
||
hdr->sh_entsize = 1;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Given a BFD section, try to locate the corresponding ELF section
|
||
index. */
|
||
|
||
static boolean
|
||
mips_elf_section_from_bfd_section (abfd, hdr, sec, retval)
|
||
bfd *abfd;
|
||
Elf32_Internal_Shdr *hdr;
|
||
asection *sec;
|
||
int *retval;
|
||
{
|
||
if (strcmp (bfd_get_section_name (abfd, sec), ".scommon") == 0)
|
||
{
|
||
*retval = SHN_MIPS_SCOMMON;
|
||
return true;
|
||
}
|
||
return false;
|
||
}
|
||
|
||
/* Work over a section just before writing it out. We update the GP
|
||
value in the .reginfo section based on the value we are using.
|
||
FIXME: We recognize sections that need the SHF_MIPS_GPREL flag by
|
||
name; there has to be a better way. */
|
||
|
||
static boolean
|
||
mips_elf_section_processing (abfd, hdr)
|
||
bfd *abfd;
|
||
Elf32_Internal_Shdr *hdr;
|
||
{
|
||
if (hdr->sh_type == SHT_MIPS_REGINFO)
|
||
{
|
||
bfd_byte buf[4];
|
||
|
||
BFD_ASSERT (hdr->sh_size == sizeof (Elf32_External_RegInfo));
|
||
BFD_ASSERT (hdr->contents == NULL);
|
||
|
||
if (bfd_seek (abfd,
|
||
hdr->sh_offset + sizeof (Elf32_External_RegInfo) - 4,
|
||
SEEK_SET) == -1)
|
||
return false;
|
||
bfd_h_put_32 (abfd, (bfd_vma) elf_gp (abfd), buf);
|
||
if (bfd_write (buf, (bfd_size_type) 1, (bfd_size_type) 4, abfd) != 4)
|
||
return false;
|
||
}
|
||
|
||
if (hdr->bfd_section != NULL)
|
||
{
|
||
const char *name = bfd_get_section_name (abfd, hdr->bfd_section);
|
||
|
||
if (strcmp (name, ".sdata") == 0)
|
||
{
|
||
hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_MIPS_GPREL;
|
||
hdr->sh_type = SHT_PROGBITS;
|
||
}
|
||
else if (strcmp (name, ".sbss") == 0)
|
||
{
|
||
hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_MIPS_GPREL;
|
||
hdr->sh_type = SHT_NOBITS;
|
||
}
|
||
else if (strcmp (name, ".lit8") == 0
|
||
|| strcmp (name, ".lit4") == 0)
|
||
{
|
||
hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_MIPS_GPREL;
|
||
hdr->sh_type = SHT_PROGBITS;
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* MIPS ELF uses two common sections. One is the usual one, and the
|
||
other is for small objects. All the small objects are kept
|
||
together, and then referenced via the gp pointer, which yields
|
||
faster assembler code. This is what we use for the small common
|
||
section. This approach is copied from ecoff.c. */
|
||
static asection mips_elf_scom_section;
|
||
static asymbol mips_elf_scom_symbol;
|
||
static asymbol *mips_elf_scom_symbol_ptr;
|
||
|
||
/* MIPS ELF also uses an acommon section, which represents an
|
||
allocated common symbol which may be overridden by a
|
||
definition in a shared library. */
|
||
static asection mips_elf_acom_section;
|
||
static asymbol mips_elf_acom_symbol;
|
||
static asymbol *mips_elf_acom_symbol_ptr;
|
||
|
||
/* Handle the special MIPS section numbers that a symbol may use. */
|
||
|
||
static void
|
||
mips_elf_symbol_processing (abfd, asym)
|
||
bfd *abfd;
|
||
asymbol *asym;
|
||
{
|
||
elf_symbol_type *elfsym;
|
||
|
||
elfsym = (elf_symbol_type *) asym;
|
||
switch (elfsym->internal_elf_sym.st_shndx)
|
||
{
|
||
case SHN_MIPS_ACOMMON:
|
||
/* This section is used in a dynamically linked executable file.
|
||
It is an allocated common section. The dynamic linker can
|
||
either resolve these symbols to something in a shared
|
||
library, or it can just leave them here. For our purposes,
|
||
we can consider these symbols to be in a new section. */
|
||
if (mips_elf_acom_section.name == NULL)
|
||
{
|
||
/* Initialize the acommon section. */
|
||
mips_elf_acom_section.name = ".acommon";
|
||
mips_elf_acom_section.flags = SEC_NO_FLAGS;
|
||
mips_elf_acom_section.output_section = &mips_elf_acom_section;
|
||
mips_elf_acom_section.symbol = &mips_elf_acom_symbol;
|
||
mips_elf_acom_section.symbol_ptr_ptr = &mips_elf_acom_symbol_ptr;
|
||
mips_elf_acom_symbol.name = ".acommon";
|
||
mips_elf_acom_symbol.flags = BSF_SECTION_SYM;
|
||
mips_elf_acom_symbol.section = &mips_elf_acom_section;
|
||
mips_elf_acom_symbol_ptr = &mips_elf_acom_symbol;
|
||
}
|
||
asym->section = &mips_elf_acom_section;
|
||
break;
|
||
|
||
case SHN_COMMON:
|
||
/* Common symbols less than the GP size are automatically
|
||
treated as SHN_MIPS_SCOMMON symbols. */
|
||
if (asym->value > elf_gp_size (abfd))
|
||
break;
|
||
/* Fall through. */
|
||
case SHN_MIPS_SCOMMON:
|
||
if (mips_elf_scom_section.name == NULL)
|
||
{
|
||
/* Initialize the small common section. */
|
||
mips_elf_scom_section.name = ".scommon";
|
||
mips_elf_scom_section.flags = SEC_IS_COMMON;
|
||
mips_elf_scom_section.output_section = &mips_elf_scom_section;
|
||
mips_elf_scom_section.symbol = &mips_elf_scom_symbol;
|
||
mips_elf_scom_section.symbol_ptr_ptr = &mips_elf_scom_symbol_ptr;
|
||
mips_elf_scom_symbol.name = ".scommon";
|
||
mips_elf_scom_symbol.flags = BSF_SECTION_SYM;
|
||
mips_elf_scom_symbol.section = &mips_elf_scom_section;
|
||
mips_elf_scom_symbol_ptr = &mips_elf_scom_symbol;
|
||
}
|
||
asym->section = &mips_elf_scom_section;
|
||
asym->value = elfsym->internal_elf_sym.st_size;
|
||
break;
|
||
|
||
case SHN_MIPS_SUNDEFINED:
|
||
asym->section = bfd_und_section_ptr;
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* Read ECOFF debugging information from a .mdebug section into a
|
||
ecoff_debug_info structure. */
|
||
|
||
static boolean
|
||
mips_elf_read_ecoff_info (abfd, section, debug)
|
||
bfd *abfd;
|
||
asection *section;
|
||
struct ecoff_debug_info *debug;
|
||
{
|
||
HDRR *symhdr;
|
||
const struct ecoff_debug_swap *swap;
|
||
char *ext_hdr = NULL;
|
||
|
||
swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
|
||
|
||
ext_hdr = (char *) malloc (swap->external_hdr_size);
|
||
if (ext_hdr == NULL && swap->external_hdr_size != 0)
|
||
{
|
||
bfd_set_error (bfd_error_no_memory);
|
||
goto error_return;
|
||
}
|
||
|
||
if (bfd_get_section_contents (abfd, section, ext_hdr, (file_ptr) 0,
|
||
swap->external_hdr_size)
|
||
== false)
|
||
goto error_return;
|
||
|
||
symhdr = &debug->symbolic_header;
|
||
(*swap->swap_hdr_in) (abfd, ext_hdr, symhdr);
|
||
|
||
/* The symbolic header contains absolute file offsets and sizes to
|
||
read. */
|
||
#define READ(ptr, offset, count, size, type) \
|
||
if (symhdr->count == 0) \
|
||
debug->ptr = NULL; \
|
||
else \
|
||
{ \
|
||
debug->ptr = (type) malloc (size * symhdr->count); \
|
||
if (debug->ptr == NULL) \
|
||
{ \
|
||
bfd_set_error (bfd_error_no_memory); \
|
||
goto error_return; \
|
||
} \
|
||
if (bfd_seek (abfd, (file_ptr) symhdr->offset, SEEK_SET) != 0 \
|
||
|| (bfd_read (debug->ptr, size, symhdr->count, \
|
||
abfd) != size * symhdr->count)) \
|
||
goto error_return; \
|
||
}
|
||
|
||
READ (line, cbLineOffset, cbLine, sizeof (unsigned char), unsigned char *);
|
||
READ (external_dnr, cbDnOffset, idnMax, swap->external_dnr_size, PTR);
|
||
READ (external_pdr, cbPdOffset, ipdMax, swap->external_pdr_size, PTR);
|
||
READ (external_sym, cbSymOffset, isymMax, swap->external_sym_size, PTR);
|
||
READ (external_opt, cbOptOffset, ioptMax, swap->external_opt_size, PTR);
|
||
READ (external_aux, cbAuxOffset, iauxMax, sizeof (union aux_ext),
|
||
union aux_ext *);
|
||
READ (ss, cbSsOffset, issMax, sizeof (char), char *);
|
||
READ (ssext, cbSsExtOffset, issExtMax, sizeof (char), char *);
|
||
READ (external_fdr, cbFdOffset, ifdMax, swap->external_fdr_size, PTR);
|
||
READ (external_rfd, cbRfdOffset, crfd, swap->external_rfd_size, PTR);
|
||
READ (external_ext, cbExtOffset, iextMax, swap->external_ext_size, PTR);
|
||
#undef READ
|
||
|
||
debug->fdr = NULL;
|
||
debug->adjust = NULL;
|
||
|
||
return true;
|
||
|
||
error_return:
|
||
if (ext_hdr != NULL)
|
||
free (ext_hdr);
|
||
if (debug->line != NULL)
|
||
free (debug->line);
|
||
if (debug->external_dnr != NULL)
|
||
free (debug->external_dnr);
|
||
if (debug->external_pdr != NULL)
|
||
free (debug->external_pdr);
|
||
if (debug->external_sym != NULL)
|
||
free (debug->external_sym);
|
||
if (debug->external_opt != NULL)
|
||
free (debug->external_opt);
|
||
if (debug->external_aux != NULL)
|
||
free (debug->external_aux);
|
||
if (debug->ss != NULL)
|
||
free (debug->ss);
|
||
if (debug->ssext != NULL)
|
||
free (debug->ssext);
|
||
if (debug->external_fdr != NULL)
|
||
free (debug->external_fdr);
|
||
if (debug->external_rfd != NULL)
|
||
free (debug->external_rfd);
|
||
if (debug->external_ext != NULL)
|
||
free (debug->external_ext);
|
||
return false;
|
||
}
|
||
|
||
/* The MIPS ELF linker needs additional information for each symbol in
|
||
the global hash table. */
|
||
|
||
struct mips_elf_link_hash_entry
|
||
{
|
||
struct elf_link_hash_entry root;
|
||
|
||
/* External symbol information. */
|
||
EXTR esym;
|
||
};
|
||
|
||
/* MIPS ELF linker hash table. */
|
||
|
||
struct mips_elf_link_hash_table
|
||
{
|
||
struct elf_link_hash_table root;
|
||
};
|
||
|
||
/* Look up an entry in a MIPS ELF linker hash table. */
|
||
|
||
#define mips_elf_link_hash_lookup(table, string, create, copy, follow) \
|
||
((struct mips_elf_link_hash_entry *) \
|
||
elf_link_hash_lookup (&(table)->root, (string), (create), \
|
||
(copy), (follow)))
|
||
|
||
/* Traverse a MIPS ELF linker hash table. */
|
||
|
||
#define mips_elf_link_hash_traverse(table, func, info) \
|
||
(elf_link_hash_traverse \
|
||
(&(table)->root, \
|
||
(boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
|
||
(info)))
|
||
|
||
/* Get the MIPS ELF linker hash table from a link_info structure. */
|
||
|
||
#define mips_elf_hash_table(p) \
|
||
((struct mips_elf_link_hash_table *) ((p)->hash))
|
||
|
||
static boolean mips_elf_output_extsym
|
||
PARAMS ((struct mips_elf_link_hash_entry *, PTR));
|
||
|
||
/* Create an entry in a MIPS ELF linker hash table. */
|
||
|
||
static struct bfd_hash_entry *
|
||
mips_elf_link_hash_newfunc (entry, table, string)
|
||
struct bfd_hash_entry *entry;
|
||
struct bfd_hash_table *table;
|
||
const char *string;
|
||
{
|
||
struct mips_elf_link_hash_entry *ret =
|
||
(struct mips_elf_link_hash_entry *) entry;
|
||
|
||
/* Allocate the structure if it has not already been allocated by a
|
||
subclass. */
|
||
if (ret == (struct mips_elf_link_hash_entry *) NULL)
|
||
ret = ((struct mips_elf_link_hash_entry *)
|
||
bfd_hash_allocate (table,
|
||
sizeof (struct mips_elf_link_hash_entry)));
|
||
if (ret == (struct mips_elf_link_hash_entry *) NULL)
|
||
{
|
||
bfd_set_error (bfd_error_no_memory);
|
||
return (struct bfd_hash_entry *) ret;
|
||
}
|
||
|
||
/* Call the allocation method of the superclass. */
|
||
ret = ((struct mips_elf_link_hash_entry *)
|
||
_bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
|
||
table, string));
|
||
if (ret != (struct mips_elf_link_hash_entry *) NULL)
|
||
{
|
||
/* Set local fields. */
|
||
memset (&ret->esym, 0, sizeof (EXTR));
|
||
/* We use -2 as a marker to indicate that the information has
|
||
not been set. -1 means there is no associated ifd. */
|
||
ret->esym.ifd = -2;
|
||
}
|
||
|
||
return (struct bfd_hash_entry *) ret;
|
||
}
|
||
|
||
/* Create a MIPS ELF linker hash table. */
|
||
|
||
static struct bfd_link_hash_table *
|
||
mips_elf_link_hash_table_create (abfd)
|
||
bfd *abfd;
|
||
{
|
||
struct mips_elf_link_hash_table *ret;
|
||
|
||
ret = ((struct mips_elf_link_hash_table *)
|
||
bfd_alloc (abfd, sizeof (struct mips_elf_link_hash_table)));
|
||
if (ret == (struct mips_elf_link_hash_table *) NULL)
|
||
{
|
||
bfd_set_error (bfd_error_no_memory);
|
||
return NULL;
|
||
}
|
||
|
||
if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
|
||
mips_elf_link_hash_newfunc))
|
||
{
|
||
bfd_release (abfd, ret);
|
||
return NULL;
|
||
}
|
||
|
||
return &ret->root.root;
|
||
}
|
||
|
||
/* Hook called by the linker routine which adds symbols from an object
|
||
file. We must handle the special MIPS section numbers here. */
|
||
|
||
/*ARGSUSED*/
|
||
static boolean
|
||
mips_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
|
||
bfd *abfd;
|
||
struct bfd_link_info *info;
|
||
const Elf_Internal_Sym *sym;
|
||
const char **namep;
|
||
flagword *flagsp;
|
||
asection **secp;
|
||
bfd_vma *valp;
|
||
{
|
||
switch (sym->st_shndx)
|
||
{
|
||
case SHN_COMMON:
|
||
/* Common symbols less than the GP size are automatically
|
||
treated as SHN_MIPS_SCOMMON symbols. */
|
||
if (sym->st_size > elf_gp_size (abfd))
|
||
break;
|
||
/* Fall through. */
|
||
case SHN_MIPS_SCOMMON:
|
||
*secp = bfd_make_section_old_way (abfd, ".scommon");
|
||
(*secp)->flags |= SEC_IS_COMMON;
|
||
*valp = sym->st_size;
|
||
break;
|
||
|
||
case SHN_MIPS_SUNDEFINED:
|
||
*secp = bfd_und_section_ptr;
|
||
break;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Structure used to pass information to mips_elf_output_extsym. */
|
||
|
||
struct extsym_info
|
||
{
|
||
bfd *abfd;
|
||
struct bfd_link_info *info;
|
||
struct ecoff_debug_info *debug;
|
||
const struct ecoff_debug_swap *swap;
|
||
boolean failed;
|
||
};
|
||
|
||
/* This routine is used to write out ECOFF debugging external symbol
|
||
information. It is called via mips_elf_link_hash_traverse. The
|
||
ECOFF external symbol information must match the ELF external
|
||
symbol information. Unfortunately, at this point we don't know
|
||
whether a symbol is required by reloc information, so the two
|
||
tables may wind up being different. We must sort out the external
|
||
symbol information before we can set the final size of the .mdebug
|
||
section, and we must set the size of the .mdebug section before we
|
||
can relocate any sections, and we can't know which symbols are
|
||
required by relocation until we relocate the sections.
|
||
Fortunately, it is relatively unlikely that any symbol will be
|
||
stripped but required by a reloc. In particular, it can not happen
|
||
when generating a final executable. */
|
||
|
||
static boolean
|
||
mips_elf_output_extsym (h, data)
|
||
struct mips_elf_link_hash_entry *h;
|
||
PTR data;
|
||
{
|
||
struct extsym_info *einfo = (struct extsym_info *) data;
|
||
boolean strip;
|
||
|
||
if (h->root.indx == -2)
|
||
strip = false;
|
||
else if (((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
|
||
|| (h->root.elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0)
|
||
&& (h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
|
||
&& (h->root.elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0)
|
||
strip = true;
|
||
else if (einfo->info->strip == strip_all
|
||
|| (einfo->info->strip == strip_some
|
||
&& bfd_hash_lookup (einfo->info->keep_hash,
|
||
h->root.root.root.string,
|
||
false, false) == NULL))
|
||
strip = true;
|
||
else
|
||
strip = false;
|
||
|
||
if (strip)
|
||
return true;
|
||
|
||
if (h->esym.ifd == -2)
|
||
{
|
||
h->esym.jmptbl = 0;
|
||
h->esym.cobol_main = 0;
|
||
h->esym.weakext = 0;
|
||
h->esym.reserved = 0;
|
||
h->esym.ifd = ifdNil;
|
||
h->esym.asym.value = 0;
|
||
h->esym.asym.st = stGlobal;
|
||
|
||
if (h->root.root.type != bfd_link_hash_defined)
|
||
h->esym.asym.sc = scAbs;
|
||
else
|
||
{
|
||
asection *output_section;
|
||
const char *name;
|
||
|
||
output_section = h->root.root.u.def.section->output_section;
|
||
name = bfd_section_name (output_section->owner, output_section);
|
||
|
||
if (strcmp (name, ".text") == 0)
|
||
h->esym.asym.sc = scText;
|
||
else if (strcmp (name, ".data") == 0)
|
||
h->esym.asym.sc = scData;
|
||
else if (strcmp (name, ".sdata") == 0)
|
||
h->esym.asym.sc = scSData;
|
||
else if (strcmp (name, ".rodata") == 0
|
||
|| strcmp (name, ".rdata") == 0)
|
||
h->esym.asym.sc = scRData;
|
||
else if (strcmp (name, ".bss") == 0)
|
||
h->esym.asym.sc = scBss;
|
||
else if (strcmp (name, ".sbss") == 0)
|
||
h->esym.asym.sc = scSBss;
|
||
else if (strcmp (name, ".init") == 0)
|
||
h->esym.asym.sc = scInit;
|
||
else if (strcmp (name, ".fini") == 0)
|
||
h->esym.asym.sc = scFini;
|
||
else
|
||
h->esym.asym.sc = scAbs;
|
||
}
|
||
|
||
h->esym.asym.reserved = 0;
|
||
h->esym.asym.index = indexNil;
|
||
}
|
||
|
||
|
||
if (! bfd_ecoff_debug_one_external (einfo->abfd, einfo->debug, einfo->swap,
|
||
h->root.root.root.string,
|
||
&h->esym))
|
||
{
|
||
einfo->failed = true;
|
||
return false;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* A comparison routine used to sort .gptab entries. */
|
||
|
||
static int
|
||
gptab_compare (p1, p2)
|
||
const PTR p1;
|
||
const PTR p2;
|
||
{
|
||
const Elf32_gptab *a1 = (const Elf32_gptab *) p1;
|
||
const Elf32_gptab *a2 = (const Elf32_gptab *) p2;
|
||
|
||
return a1->gt_entry.gt_g_value - a2->gt_entry.gt_g_value;
|
||
}
|
||
|
||
/* We need to use a special link routine to handle the .reginfo and
|
||
the .mdebug sections. We need to merge all instances of these
|
||
sections together, not write them all out sequentially. */
|
||
|
||
static boolean
|
||
mips_elf_final_link (abfd, info)
|
||
bfd *abfd;
|
||
struct bfd_link_info *info;
|
||
{
|
||
asection **secpp;
|
||
asection *o;
|
||
struct bfd_link_order *p;
|
||
asection *reginfo_sec, *mdebug_sec, *gptab_data_sec, *gptab_bss_sec;
|
||
Elf32_RegInfo reginfo;
|
||
struct ecoff_debug_info debug;
|
||
const struct ecoff_debug_swap *swap
|
||
= get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
|
||
HDRR *symhdr = &debug.symbolic_header;
|
||
PTR mdebug_handle = NULL;
|
||
|
||
/* Drop the .options section, since it has special semantics which I
|
||
haven't bothered to figure out. */
|
||
for (secpp = &abfd->sections; *secpp != NULL; secpp = &(*secpp)->next)
|
||
{
|
||
if (strcmp ((*secpp)->name, ".options") == 0)
|
||
{
|
||
for (p = (*secpp)->link_order_head; p != NULL; p = p->next)
|
||
if (p->type == bfd_indirect_link_order)
|
||
p->u.indirect.section->flags &=~ SEC_HAS_CONTENTS;
|
||
(*secpp)->link_order_head = NULL;
|
||
*secpp = (*secpp)->next;
|
||
--abfd->section_count;
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* Go through the sections and collect the .reginfo and .mdebug
|
||
information. */
|
||
reginfo_sec = NULL;
|
||
mdebug_sec = NULL;
|
||
gptab_data_sec = NULL;
|
||
gptab_bss_sec = NULL;
|
||
for (o = abfd->sections; o != (asection *) NULL; o = o->next)
|
||
{
|
||
if (strcmp (o->name, ".reginfo") == 0)
|
||
{
|
||
memset (®info, 0, sizeof reginfo);
|
||
|
||
/* We have found the .reginfo section in the output file.
|
||
Look through all the link_orders comprising it and merge
|
||
the information together. */
|
||
for (p = o->link_order_head;
|
||
p != (struct bfd_link_order *) NULL;
|
||
p = p->next)
|
||
{
|
||
asection *input_section;
|
||
bfd *input_bfd;
|
||
Elf32_External_RegInfo ext;
|
||
Elf32_RegInfo sub;
|
||
|
||
if (p->type != bfd_indirect_link_order)
|
||
{
|
||
if (p->type == bfd_fill_link_order)
|
||
continue;
|
||
abort ();
|
||
}
|
||
|
||
input_section = p->u.indirect.section;
|
||
input_bfd = input_section->owner;
|
||
BFD_ASSERT (input_section->_raw_size
|
||
== sizeof (Elf32_External_RegInfo));
|
||
if (! bfd_get_section_contents (input_bfd, input_section,
|
||
(PTR) &ext,
|
||
(file_ptr) 0,
|
||
sizeof ext))
|
||
return false;
|
||
|
||
bfd_mips_elf32_swap_reginfo_in (input_bfd, &ext, &sub);
|
||
|
||
reginfo.ri_gprmask |= sub.ri_gprmask;
|
||
reginfo.ri_cprmask[0] |= sub.ri_cprmask[0];
|
||
reginfo.ri_cprmask[1] |= sub.ri_cprmask[1];
|
||
reginfo.ri_cprmask[2] |= sub.ri_cprmask[2];
|
||
reginfo.ri_cprmask[3] |= sub.ri_cprmask[3];
|
||
|
||
/* ri_gp_value is set by the function
|
||
mips_elf_section_processing when the section is
|
||
finally written out. */
|
||
|
||
/* Hack: reset the SEC_HAS_CONTENTS flag so that
|
||
elf_link_input_bfd ignores this section. */
|
||
input_section->flags &=~ SEC_HAS_CONTENTS;
|
||
}
|
||
|
||
/* Force the section size to the value we want. */
|
||
o->_raw_size = sizeof (Elf32_External_RegInfo);
|
||
|
||
/* Skip this section later on (I don't think this currently
|
||
matters, but someday it might). */
|
||
o->link_order_head = (struct bfd_link_order *) NULL;
|
||
|
||
reginfo_sec = o;
|
||
}
|
||
|
||
if (strcmp (o->name, ".mdebug") == 0)
|
||
{
|
||
struct extsym_info einfo;
|
||
|
||
/* We have found the .mdebug section in the output file.
|
||
Look through all the link_orders comprising it and merge
|
||
the information together. */
|
||
symhdr->magic = swap->sym_magic;
|
||
/* FIXME: What should the version stamp be? */
|
||
symhdr->vstamp = 0;
|
||
symhdr->ilineMax = 0;
|
||
symhdr->cbLine = 0;
|
||
symhdr->idnMax = 0;
|
||
symhdr->ipdMax = 0;
|
||
symhdr->isymMax = 0;
|
||
symhdr->ioptMax = 0;
|
||
symhdr->iauxMax = 0;
|
||
symhdr->issMax = 0;
|
||
symhdr->issExtMax = 0;
|
||
symhdr->ifdMax = 0;
|
||
symhdr->crfd = 0;
|
||
symhdr->iextMax = 0;
|
||
|
||
/* We accumulate the debugging information itself in the
|
||
debug_info structure. */
|
||
debug.line = NULL;
|
||
debug.external_dnr = NULL;
|
||
debug.external_pdr = NULL;
|
||
debug.external_sym = NULL;
|
||
debug.external_opt = NULL;
|
||
debug.external_aux = NULL;
|
||
debug.ss = NULL;
|
||
debug.ssext = debug.ssext_end = NULL;
|
||
debug.external_fdr = NULL;
|
||
debug.external_rfd = NULL;
|
||
debug.external_ext = debug.external_ext_end = NULL;
|
||
|
||
mdebug_handle = bfd_ecoff_debug_init (abfd, &debug, swap, info);
|
||
if (mdebug_handle == (PTR) NULL)
|
||
return false;
|
||
|
||
for (p = o->link_order_head;
|
||
p != (struct bfd_link_order *) NULL;
|
||
p = p->next)
|
||
{
|
||
asection *input_section;
|
||
bfd *input_bfd;
|
||
const struct ecoff_debug_swap *input_swap;
|
||
struct ecoff_debug_info input_debug;
|
||
char *eraw_src;
|
||
char *eraw_end;
|
||
|
||
if (p->type != bfd_indirect_link_order)
|
||
{
|
||
if (p->type == bfd_fill_link_order)
|
||
continue;
|
||
abort ();
|
||
}
|
||
|
||
input_section = p->u.indirect.section;
|
||
input_bfd = input_section->owner;
|
||
|
||
if (bfd_get_flavour (input_bfd) != bfd_target_elf_flavour
|
||
|| (get_elf_backend_data (input_bfd)
|
||
->elf_backend_ecoff_debug_swap) == NULL)
|
||
{
|
||
/* I don't know what a non MIPS ELF bfd would be
|
||
doing with a .mdebug section, but I don't really
|
||
want to deal with it. */
|
||
continue;
|
||
}
|
||
|
||
input_swap = (get_elf_backend_data (input_bfd)
|
||
->elf_backend_ecoff_debug_swap);
|
||
|
||
BFD_ASSERT (p->size == input_section->_raw_size);
|
||
|
||
/* The ECOFF linking code expects that we have already
|
||
read in the debugging information and set up an
|
||
ecoff_debug_info structure, so we do that now. */
|
||
if (! mips_elf_read_ecoff_info (input_bfd, input_section,
|
||
&input_debug))
|
||
return false;
|
||
|
||
if (! (bfd_ecoff_debug_accumulate
|
||
(mdebug_handle, abfd, &debug, swap, input_bfd,
|
||
&input_debug, input_swap, info)))
|
||
return false;
|
||
|
||
/* Loop through the external symbols. For each one with
|
||
interesting information, try to find the symbol in
|
||
the linker global hash table and save the information
|
||
for the output external symbols. */
|
||
eraw_src = input_debug.external_ext;
|
||
eraw_end = (eraw_src
|
||
+ (input_debug.symbolic_header.iextMax
|
||
* input_swap->external_ext_size));
|
||
for (;
|
||
eraw_src < eraw_end;
|
||
eraw_src += input_swap->external_ext_size)
|
||
{
|
||
EXTR ext;
|
||
const char *name;
|
||
struct mips_elf_link_hash_entry *h;
|
||
|
||
(*input_swap->swap_ext_in) (input_bfd, (PTR) eraw_src, &ext);
|
||
if (ext.asym.sc == scNil
|
||
|| ext.asym.sc == scUndefined
|
||
|| ext.asym.sc == scSUndefined)
|
||
continue;
|
||
|
||
name = input_debug.ssext + ext.asym.iss;
|
||
h = mips_elf_link_hash_lookup (mips_elf_hash_table (info),
|
||
name, false, false, true);
|
||
if (h == NULL || h->esym.ifd != -2)
|
||
continue;
|
||
|
||
if (ext.ifd != -1)
|
||
{
|
||
BFD_ASSERT (ext.ifd
|
||
< input_debug.symbolic_header.ifdMax);
|
||
ext.ifd = input_debug.ifdmap[ext.ifd];
|
||
}
|
||
|
||
h->esym = ext;
|
||
}
|
||
|
||
/* Free up the information we just read. */
|
||
free (input_debug.line);
|
||
free (input_debug.external_dnr);
|
||
free (input_debug.external_pdr);
|
||
free (input_debug.external_sym);
|
||
free (input_debug.external_opt);
|
||
free (input_debug.external_aux);
|
||
free (input_debug.ss);
|
||
free (input_debug.ssext);
|
||
free (input_debug.external_fdr);
|
||
free (input_debug.external_rfd);
|
||
free (input_debug.external_ext);
|
||
|
||
/* Hack: reset the SEC_HAS_CONTENTS flag so that
|
||
elf_link_input_bfd ignores this section. */
|
||
input_section->flags &=~ SEC_HAS_CONTENTS;
|
||
}
|
||
|
||
/* Build the external symbol information. */
|
||
einfo.abfd = abfd;
|
||
einfo.info = info;
|
||
einfo.debug = &debug;
|
||
einfo.swap = swap;
|
||
einfo.failed = false;
|
||
mips_elf_link_hash_traverse (mips_elf_hash_table (info),
|
||
mips_elf_output_extsym,
|
||
(PTR) &einfo);
|
||
if (einfo.failed)
|
||
return false;
|
||
|
||
/* Set the size of the .mdebug section. */
|
||
o->_raw_size = bfd_ecoff_debug_size (abfd, &debug, swap);
|
||
|
||
/* Skip this section later on (I don't think this currently
|
||
matters, but someday it might). */
|
||
o->link_order_head = (struct bfd_link_order *) NULL;
|
||
|
||
mdebug_sec = o;
|
||
}
|
||
|
||
if (strncmp (o->name, ".gptab.", sizeof ".gptab." - 1) == 0)
|
||
{
|
||
const char *subname;
|
||
unsigned int c;
|
||
Elf32_gptab *tab;
|
||
Elf32_External_gptab *ext_tab;
|
||
unsigned int i;
|
||
|
||
/* The .gptab.sdata and .gptab.sbss sections hold
|
||
information describing how the small data area would
|
||
change depending upon the -G switch. These sections
|
||
not used in executables files. */
|
||
if (! info->relocateable)
|
||
{
|
||
asection **secpp;
|
||
|
||
for (p = o->link_order_head;
|
||
p != (struct bfd_link_order *) NULL;
|
||
p = p->next)
|
||
{
|
||
asection *input_section;
|
||
|
||
if (p->type != bfd_indirect_link_order)
|
||
{
|
||
if (p->type == bfd_fill_link_order)
|
||
continue;
|
||
abort ();
|
||
}
|
||
|
||
input_section = p->u.indirect.section;
|
||
|
||
/* Hack: reset the SEC_HAS_CONTENTS flag so that
|
||
elf_link_input_bfd ignores this section. */
|
||
input_section->flags &=~ SEC_HAS_CONTENTS;
|
||
}
|
||
|
||
/* Skip this section later on (I don't think this
|
||
currently matters, but someday it might). */
|
||
o->link_order_head = (struct bfd_link_order *) NULL;
|
||
|
||
/* Really remove the section. */
|
||
for (secpp = &abfd->sections;
|
||
*secpp != o;
|
||
secpp = &(*secpp)->next)
|
||
;
|
||
*secpp = (*secpp)->next;
|
||
--abfd->section_count;
|
||
|
||
continue;
|
||
}
|
||
|
||
/* There is one gptab for initialized data, and one for
|
||
uninitialized data. */
|
||
if (strcmp (o->name, ".gptab.sdata") == 0)
|
||
gptab_data_sec = o;
|
||
else if (strcmp (o->name, ".gptab.sbss") == 0)
|
||
gptab_bss_sec = o;
|
||
else
|
||
{
|
||
bfd_set_error (bfd_error_nonrepresentable_section);
|
||
return false;
|
||
}
|
||
|
||
/* The linker script always combines .gptab.data and
|
||
.gptab.sdata into .gptab.sdata, and likewise for
|
||
.gptab.bss and .gptab.sbss. It is possible that there is
|
||
no .sdata or .sbss section in the output file, in which
|
||
case we must change the name of the output section. */
|
||
subname = o->name + sizeof ".gptab" - 1;
|
||
if (bfd_get_section_by_name (abfd, subname) == NULL)
|
||
{
|
||
if (o == gptab_data_sec)
|
||
o->name = ".gptab.data";
|
||
else
|
||
o->name = ".gptab.bss";
|
||
subname = o->name + sizeof ".gptab" - 1;
|
||
BFD_ASSERT (bfd_get_section_by_name (abfd, subname) != NULL);
|
||
}
|
||
|
||
/* Set up the first entry. */
|
||
c = 1;
|
||
tab = (Elf32_gptab *) malloc (c * sizeof (Elf32_gptab));
|
||
if (tab == NULL)
|
||
{
|
||
bfd_set_error (bfd_error_no_memory);
|
||
return false;
|
||
}
|
||
tab[0].gt_header.gt_current_g_value = elf_gp_size (abfd);
|
||
tab[0].gt_header.gt_unused = 0;
|
||
|
||
/* Combine the input sections. */
|
||
for (p = o->link_order_head;
|
||
p != (struct bfd_link_order *) NULL;
|
||
p = p->next)
|
||
{
|
||
asection *input_section;
|
||
bfd *input_bfd;
|
||
bfd_size_type size;
|
||
unsigned long last;
|
||
bfd_size_type gpentry;
|
||
|
||
if (p->type != bfd_indirect_link_order)
|
||
{
|
||
if (p->type == bfd_fill_link_order)
|
||
continue;
|
||
abort ();
|
||
}
|
||
|
||
input_section = p->u.indirect.section;
|
||
input_bfd = input_section->owner;
|
||
|
||
/* Combine the gptab entries for this input section one
|
||
by one. We know that the input gptab entries are
|
||
sorted by ascending -G value. */
|
||
size = bfd_section_size (input_bfd, input_section);
|
||
last = 0;
|
||
for (gpentry = sizeof (Elf32_External_gptab);
|
||
gpentry < size;
|
||
gpentry += sizeof (Elf32_External_gptab))
|
||
{
|
||
Elf32_External_gptab ext_gptab;
|
||
Elf32_gptab int_gptab;
|
||
unsigned long val;
|
||
unsigned long add;
|
||
boolean exact;
|
||
unsigned int look;
|
||
|
||
if (! (bfd_get_section_contents
|
||
(input_bfd, input_section, (PTR) &ext_gptab,
|
||
gpentry, sizeof (Elf32_External_gptab))))
|
||
{
|
||
free (tab);
|
||
return false;
|
||
}
|
||
|
||
bfd_mips_elf32_swap_gptab_in (input_bfd, &ext_gptab,
|
||
&int_gptab);
|
||
val = int_gptab.gt_entry.gt_g_value;
|
||
add = int_gptab.gt_entry.gt_bytes - last;
|
||
|
||
exact = false;
|
||
for (look = 1; look < c; look++)
|
||
{
|
||
if (tab[look].gt_entry.gt_g_value >= val)
|
||
tab[look].gt_entry.gt_bytes += add;
|
||
|
||
if (tab[look].gt_entry.gt_g_value == val)
|
||
exact = true;
|
||
}
|
||
|
||
if (! exact)
|
||
{
|
||
Elf32_gptab *new_tab;
|
||
unsigned int max;
|
||
|
||
/* We need a new table entry. */
|
||
new_tab = ((Elf32_gptab *)
|
||
realloc ((PTR) tab,
|
||
(c + 1) * sizeof (Elf32_gptab)));
|
||
if (new_tab == NULL)
|
||
{
|
||
bfd_set_error (bfd_error_no_memory);
|
||
free (tab);
|
||
return false;
|
||
}
|
||
tab = new_tab;
|
||
tab[c].gt_entry.gt_g_value = val;
|
||
tab[c].gt_entry.gt_bytes = add;
|
||
|
||
/* Merge in the size for the next smallest -G
|
||
value, since that will be implied by this new
|
||
value. */
|
||
max = 0;
|
||
for (look = 1; look < c; look++)
|
||
{
|
||
if (tab[look].gt_entry.gt_g_value < val
|
||
&& (max == 0
|
||
|| (tab[look].gt_entry.gt_g_value
|
||
> tab[max].gt_entry.gt_g_value)))
|
||
max = look;
|
||
}
|
||
if (max != 0)
|
||
tab[c].gt_entry.gt_bytes +=
|
||
tab[max].gt_entry.gt_bytes;
|
||
|
||
++c;
|
||
}
|
||
|
||
last = int_gptab.gt_entry.gt_bytes;
|
||
}
|
||
|
||
/* Hack: reset the SEC_HAS_CONTENTS flag so that
|
||
elf_link_input_bfd ignores this section. */
|
||
input_section->flags &=~ SEC_HAS_CONTENTS;
|
||
}
|
||
|
||
/* The table must be sorted by -G value. */
|
||
if (c > 2)
|
||
qsort (tab + 1, c - 1, sizeof (tab[0]), gptab_compare);
|
||
|
||
/* Swap out the table. */
|
||
ext_tab = ((Elf32_External_gptab *)
|
||
bfd_alloc (abfd, c * sizeof (Elf32_External_gptab)));
|
||
if (ext_tab == NULL)
|
||
{
|
||
bfd_set_error (bfd_error_no_memory);
|
||
free (tab);
|
||
return false;
|
||
}
|
||
|
||
for (i = 0; i < c; i++)
|
||
bfd_mips_elf32_swap_gptab_out (abfd, tab + i, ext_tab + i);
|
||
free (tab);
|
||
|
||
o->_raw_size = c * sizeof (Elf32_External_gptab);
|
||
o->contents = (bfd_byte *) ext_tab;
|
||
|
||
/* Skip this section later on (I don't think this currently
|
||
matters, but someday it might). */
|
||
o->link_order_head = (struct bfd_link_order *) NULL;
|
||
}
|
||
}
|
||
|
||
/* Get a value for the GP register. */
|
||
if (elf_gp (abfd) == 0)
|
||
{
|
||
struct bfd_link_hash_entry *h;
|
||
|
||
h = bfd_link_hash_lookup (info->hash, "_gp", false, false, true);
|
||
if (h != (struct bfd_link_hash_entry *) NULL
|
||
&& h->type == bfd_link_hash_defined)
|
||
elf_gp (abfd) = (h->u.def.value
|
||
+ h->u.def.section->output_section->vma
|
||
+ h->u.def.section->output_offset);
|
||
else if (info->relocateable)
|
||
{
|
||
bfd_vma lo;
|
||
|
||
/* Make up a value. */
|
||
lo = (bfd_vma) -1;
|
||
for (o = abfd->sections; o != (asection *) NULL; o = o->next)
|
||
{
|
||
if (o->vma < lo
|
||
&& (strcmp (o->name, ".sbss") == 0
|
||
|| strcmp (o->name, ".sdata") == 0
|
||
|| strcmp (o->name, ".lit4") == 0
|
||
|| strcmp (o->name, ".lit8") == 0))
|
||
lo = o->vma;
|
||
}
|
||
elf_gp (abfd) = lo + 0x8000;
|
||
}
|
||
else
|
||
{
|
||
/* If the relocate_section function needs to do a reloc
|
||
involving the GP value, it should make a reloc_dangerous
|
||
callback to warn that GP is not defined. */
|
||
}
|
||
}
|
||
|
||
/* Invoke the regular ELF backend linker to do all the work. */
|
||
if (! bfd_elf32_bfd_final_link (abfd, info))
|
||
return false;
|
||
|
||
/* Now write out the computed sections. */
|
||
|
||
if (reginfo_sec != (asection *) NULL)
|
||
{
|
||
Elf32_External_RegInfo ext;
|
||
|
||
bfd_mips_elf32_swap_reginfo_out (abfd, ®info, &ext);
|
||
if (! bfd_set_section_contents (abfd, reginfo_sec, (PTR) &ext,
|
||
(file_ptr) 0, sizeof ext))
|
||
return false;
|
||
}
|
||
|
||
if (mdebug_sec != (asection *) NULL)
|
||
{
|
||
BFD_ASSERT (abfd->output_has_begun);
|
||
if (! bfd_ecoff_write_accumulated_debug (mdebug_handle, abfd, &debug,
|
||
swap, info,
|
||
mdebug_sec->filepos))
|
||
return false;
|
||
|
||
bfd_ecoff_debug_free (mdebug_handle, abfd, &debug, swap, info);
|
||
}
|
||
|
||
if (gptab_data_sec != (asection *) NULL)
|
||
{
|
||
if (! bfd_set_section_contents (abfd, gptab_data_sec,
|
||
gptab_data_sec->contents,
|
||
(file_ptr) 0,
|
||
gptab_data_sec->_raw_size))
|
||
return false;
|
||
}
|
||
|
||
if (gptab_bss_sec != (asection *) NULL)
|
||
{
|
||
if (! bfd_set_section_contents (abfd, gptab_bss_sec,
|
||
gptab_bss_sec->contents,
|
||
(file_ptr) 0,
|
||
gptab_bss_sec->_raw_size))
|
||
return false;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Handle a MIPS ELF HI16 reloc. */
|
||
|
||
static void
|
||
mips_elf_relocate_hi16 (input_bfd, relhi, rello, contents, addend)
|
||
bfd *input_bfd;
|
||
Elf_Internal_Rela *relhi;
|
||
Elf_Internal_Rela *rello;
|
||
bfd_byte *contents;
|
||
bfd_vma addend;
|
||
{
|
||
bfd_vma insn;
|
||
bfd_vma addlo;
|
||
|
||
insn = bfd_get_32 (input_bfd, contents + relhi->r_offset);
|
||
|
||
addlo = bfd_get_32 (input_bfd, contents + rello->r_offset);
|
||
addlo &= 0xffff;
|
||
|
||
addend += ((insn & 0xffff) << 16) + addlo;
|
||
|
||
if ((addlo & 0x8000) != 0)
|
||
addend -= 0x10000;
|
||
if ((addend & 0x8000) != 0)
|
||
addend += 0x10000;
|
||
|
||
bfd_put_32 (input_bfd,
|
||
(insn & 0xffff0000) | ((addend >> 16) & 0xffff),
|
||
contents + relhi->r_offset);
|
||
}
|
||
|
||
/* Relocate a MIPS ELF section. */
|
||
|
||
static boolean
|
||
mips_elf_relocate_section (output_bfd, info, input_bfd, input_section,
|
||
contents, relocs, local_syms, local_sections,
|
||
output_names)
|
||
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;
|
||
char *output_names;
|
||
{
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
size_t locsymcount;
|
||
size_t extsymoff;
|
||
Elf_Internal_Rela *rel;
|
||
Elf_Internal_Rela *relend;
|
||
|
||
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
||
|
||
if (elf_bad_symtab (input_bfd))
|
||
{
|
||
locsymcount = symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
|
||
extsymoff = 0;
|
||
}
|
||
else
|
||
{
|
||
locsymcount = symtab_hdr->sh_info;
|
||
extsymoff = symtab_hdr->sh_info;
|
||
}
|
||
|
||
rel = relocs;
|
||
relend = relocs + input_section->reloc_count;
|
||
for (; rel < relend; rel++)
|
||
{
|
||
int r_type;
|
||
const reloc_howto_type *howto;
|
||
long r_symndx;
|
||
bfd_vma addend;
|
||
struct elf_link_hash_entry *h;
|
||
asection *sec;
|
||
Elf_Internal_Sym *sym;
|
||
bfd_reloc_status_type r;
|
||
|
||
r_type = ELF32_R_TYPE (rel->r_info);
|
||
if (r_type < 0 || r_type >= (int) R_MIPS_max)
|
||
{
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return false;
|
||
}
|
||
howto = elf_mips_howto_table + r_type;
|
||
|
||
r_symndx = ELF32_R_SYM (rel->r_info);
|
||
|
||
/* Mix in the change in GP address for a GP relative reloc. */
|
||
if (r_type != R_MIPS_GPREL16
|
||
&& r_type != R_MIPS_LITERAL
|
||
&& r_type != R_MIPS_GPREL32)
|
||
addend = 0;
|
||
else
|
||
{
|
||
if (elf_gp (output_bfd) == 0)
|
||
{
|
||
if (! ((*info->callbacks->reloc_dangerous)
|
||
(info,
|
||
"GP relative relocation when GP not defined",
|
||
input_bfd, input_section,
|
||
rel->r_offset)))
|
||
return false;
|
||
/* Only give the error once per link. */
|
||
elf_gp (output_bfd) = 4;
|
||
}
|
||
|
||
if (r_symndx < extsymoff
|
||
|| (elf_bad_symtab (input_bfd)
|
||
&& local_sections[r_symndx] != NULL))
|
||
{
|
||
/* This is a relocation against a section. The current
|
||
addend in the instruction is the difference between
|
||
INPUT_SECTION->vma and the GP value of INPUT_BFD. We
|
||
must change this to be the difference between the
|
||
final definition (which will end up in RELOCATION)
|
||
and the GP value of OUTPUT_BFD (which is in GP). */
|
||
addend = elf_gp (input_bfd) - elf_gp (output_bfd);
|
||
}
|
||
else if (! info->relocateable)
|
||
{
|
||
/* We are doing a final link. The current addend in the
|
||
instruction is simply the desired offset into the
|
||
symbol (normally zero). We want the instruction to
|
||
hold the difference between the final definition of
|
||
the symbol (which will end up in RELOCATION) and the
|
||
GP value of OUTPUT_BFD (which is in GP). */
|
||
addend = - elf_gp (output_bfd);
|
||
}
|
||
else
|
||
{
|
||
/* We are generating relocateable output, and we aren't
|
||
going to define this symbol, so we just leave the
|
||
instruction alone. */
|
||
addend = 0;
|
||
}
|
||
}
|
||
|
||
h = NULL;
|
||
sym = NULL;
|
||
sec = NULL;
|
||
if (info->relocateable)
|
||
{
|
||
/* This is a relocateable 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. */
|
||
if (r_symndx >= locsymcount
|
||
|| (elf_bad_symtab (input_bfd)
|
||
&& local_sections[r_symndx] == NULL))
|
||
r = bfd_reloc_ok;
|
||
else
|
||
{
|
||
sym = local_syms + r_symndx;
|
||
if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
|
||
r = bfd_reloc_ok;
|
||
else
|
||
{
|
||
sec = local_sections[r_symndx];
|
||
|
||
/* It would be logical to add sym->st_value here,
|
||
but Irix 5 sometimes generates a garbage symbol
|
||
value. */
|
||
addend += sec->output_offset;
|
||
|
||
/* If this is HI16 with an associated LO16, adjust
|
||
the addend accordingly. Otherwise, just
|
||
relocate. */
|
||
if (r_type != R_MIPS_HI16
|
||
|| (rel + 1) >= relend
|
||
|| ELF32_R_TYPE ((rel + 1)->r_info) != R_MIPS_LO16)
|
||
r = _bfd_relocate_contents (howto, input_bfd,
|
||
addend,
|
||
contents + rel->r_offset);
|
||
else
|
||
{
|
||
mips_elf_relocate_hi16 (input_bfd, rel, rel + 1,
|
||
contents, addend);
|
||
r = bfd_reloc_ok;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
else
|
||
{
|
||
bfd_vma relocation;
|
||
|
||
/* This is a final link. */
|
||
sym = NULL;
|
||
if (r_symndx < extsymoff
|
||
|| (elf_bad_symtab (input_bfd)
|
||
&& local_sections[r_symndx] != NULL))
|
||
{
|
||
sym = local_syms + r_symndx;
|
||
sec = local_sections[r_symndx];
|
||
relocation = (sec->output_section->vma
|
||
+ sec->output_offset);
|
||
|
||
/* It would be logical to always add sym->st_value here,
|
||
but Irix 5 sometimes generates a garbage symbol
|
||
value. */
|
||
if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
|
||
relocation += sym->st_value;
|
||
}
|
||
else
|
||
{
|
||
long indx;
|
||
|
||
indx = r_symndx - extsymoff;
|
||
h = elf_sym_hashes (input_bfd)[indx];
|
||
if (h->root.type == bfd_link_hash_defined)
|
||
{
|
||
sec = h->root.u.def.section;
|
||
relocation = (h->root.u.def.value
|
||
+ sec->output_section->vma
|
||
+ sec->output_offset);
|
||
}
|
||
else if (h->root.type == bfd_link_hash_weak)
|
||
relocation = 0;
|
||
else
|
||
{
|
||
if (! ((*info->callbacks->undefined_symbol)
|
||
(info, h->root.root.string, input_bfd,
|
||
input_section, rel->r_offset)))
|
||
return false;
|
||
relocation = 0;
|
||
}
|
||
}
|
||
|
||
if (r_type != R_MIPS_HI16
|
||
|| (rel + 1) >= relend
|
||
|| ELF32_R_TYPE ((rel + 1)->r_info) != R_MIPS_LO16)
|
||
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
||
contents, rel->r_offset,
|
||
relocation, addend);
|
||
else
|
||
{
|
||
mips_elf_relocate_hi16 (input_bfd, rel, rel + 1,
|
||
contents, relocation + addend);
|
||
r = bfd_reloc_ok;
|
||
}
|
||
}
|
||
|
||
if (r != bfd_reloc_ok)
|
||
{
|
||
switch (r)
|
||
{
|
||
default:
|
||
case bfd_reloc_outofrange:
|
||
abort ();
|
||
case bfd_reloc_overflow:
|
||
{
|
||
const char *name;
|
||
|
||
if (h != NULL)
|
||
name = h->root.root.string;
|
||
else
|
||
{
|
||
name = output_names + sym->st_name;
|
||
if (name == NULL)
|
||
return false;
|
||
if (*name == '\0')
|
||
name = bfd_section_name (input_bfd, sec);
|
||
}
|
||
if (! ((*info->callbacks->reloc_overflow)
|
||
(info, name, howto->name, (bfd_vma) 0,
|
||
input_bfd, input_section, rel->r_offset)))
|
||
return false;
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* ECOFF swapping routines. These are used when dealing with the
|
||
.mdebug section, which is in the ECOFF debugging format. */
|
||
static const struct ecoff_debug_swap mips_elf_ecoff_debug_swap =
|
||
{
|
||
/* Symbol table magic number. */
|
||
magicSym,
|
||
/* Alignment of debugging information. E.g., 4. */
|
||
4,
|
||
/* Sizes of external symbolic information. */
|
||
sizeof (struct hdr_ext),
|
||
sizeof (struct dnr_ext),
|
||
sizeof (struct pdr_ext),
|
||
sizeof (struct sym_ext),
|
||
sizeof (struct opt_ext),
|
||
sizeof (struct fdr_ext),
|
||
sizeof (struct rfd_ext),
|
||
sizeof (struct ext_ext),
|
||
/* Functions to swap in external symbolic data. */
|
||
ecoff_swap_hdr_in,
|
||
ecoff_swap_dnr_in,
|
||
ecoff_swap_pdr_in,
|
||
ecoff_swap_sym_in,
|
||
ecoff_swap_opt_in,
|
||
ecoff_swap_fdr_in,
|
||
ecoff_swap_rfd_in,
|
||
ecoff_swap_ext_in,
|
||
_bfd_ecoff_swap_tir_in,
|
||
_bfd_ecoff_swap_rndx_in,
|
||
/* Functions to swap out external symbolic data. */
|
||
ecoff_swap_hdr_out,
|
||
ecoff_swap_dnr_out,
|
||
ecoff_swap_pdr_out,
|
||
ecoff_swap_sym_out,
|
||
ecoff_swap_opt_out,
|
||
ecoff_swap_fdr_out,
|
||
ecoff_swap_rfd_out,
|
||
ecoff_swap_ext_out,
|
||
_bfd_ecoff_swap_tir_out,
|
||
_bfd_ecoff_swap_rndx_out,
|
||
/* Function to read in symbolic data. */
|
||
mips_elf_read_ecoff_info
|
||
};
|
||
|
||
#define TARGET_LITTLE_SYM bfd_elf32_littlemips_vec
|
||
#define TARGET_LITTLE_NAME "elf32-littlemips"
|
||
#define TARGET_BIG_SYM bfd_elf32_bigmips_vec
|
||
#define TARGET_BIG_NAME "elf32-bigmips"
|
||
#define ELF_ARCH bfd_arch_mips
|
||
#define ELF_MACHINE_CODE EM_MIPS
|
||
#define ELF_MAXPAGESIZE 0x10000
|
||
#define elf_backend_collect true
|
||
#define elf_info_to_howto 0
|
||
#define elf_info_to_howto_rel mips_info_to_howto_rel
|
||
#define elf_backend_sym_is_global mips_elf_sym_is_global
|
||
#define elf_backend_object_p mips_elf_object_p
|
||
#define elf_backend_section_from_shdr mips_elf_section_from_shdr
|
||
#define elf_backend_fake_sections mips_elf_fake_sections
|
||
#define elf_backend_section_from_bfd_section \
|
||
mips_elf_section_from_bfd_section
|
||
#define elf_backend_section_processing mips_elf_section_processing
|
||
#define elf_backend_symbol_processing mips_elf_symbol_processing
|
||
#define elf_backend_final_write_processing \
|
||
mips_elf_final_write_processing
|
||
#define elf_backend_ecoff_debug_swap &mips_elf_ecoff_debug_swap
|
||
|
||
#define bfd_elf32_bfd_link_hash_table_create \
|
||
mips_elf_link_hash_table_create
|
||
#define bfd_elf32_bfd_final_link mips_elf_final_link
|
||
#define elf_backend_relocate_section mips_elf_relocate_section
|
||
#define elf_backend_add_symbol_hook mips_elf_add_symbol_hook
|
||
|
||
#include "elf32-target.h"
|