mirror of
https://github.com/darlinghq/darling-gdb.git
synced 2024-12-05 02:47:05 +00:00
5907e6285e
(elf32_h8_relax_delete_bytes): Likewise. (elf32_h8_symbol_address_p): Likewise. (elf32_h8_get_relocated_section_contents): Likewise. (bfd_elf32_bfd_relax_section): Define. (bfd_elf32_bfd_get_relocated_section_contents): Likewise.
1542 lines
44 KiB
C
1542 lines
44 KiB
C
/* Generic support for 32-bit ELF
|
||
Copyright 1993, 1995, 1998, 1999 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
||
|
||
#include "bfd.h"
|
||
#include "sysdep.h"
|
||
#include "libbfd.h"
|
||
#include "elf-bfd.h"
|
||
#include "elf/h8.h"
|
||
|
||
static reloc_howto_type *elf32_h8_reloc_type_lookup
|
||
PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
|
||
static void elf32_h8_info_to_howto
|
||
PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
|
||
static void elf32_h8_info_to_howto_rel
|
||
PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *));
|
||
static int elf32_h8_mach
|
||
PARAMS ((flagword));
|
||
static bfd_reloc_status_type elf32_h8_final_link_relocate
|
||
PARAMS ((unsigned long, bfd *, bfd *, asection *,
|
||
bfd_byte *, bfd_vma, bfd_vma, bfd_vma,
|
||
struct bfd_link_info *, asection *, int));
|
||
static boolean elf32_h8_relocate_section
|
||
PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *,
|
||
bfd_byte *, Elf_Internal_Rela *,
|
||
Elf_Internal_Sym *, asection **));
|
||
static bfd_reloc_status_type special
|
||
PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
|
||
|
||
/* This does not include any relocation information, but should be
|
||
good enough for GDB or objdump to read the file. */
|
||
|
||
static reloc_howto_type h8_elf_howto_table[] =
|
||
{
|
||
#define R_H8_NONE_X 0
|
||
HOWTO (R_H8_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 */
|
||
special, /* special_function */
|
||
"R_H8_NONE", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
#define R_H8_DIR32_X (R_H8_NONE_X + 1)
|
||
HOWTO (R_H8_DIR32, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
special, /* special_function */
|
||
"R_H8_DIR32", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
#define R_H8_DIR16_X (R_H8_DIR32_X + 1)
|
||
HOWTO (R_H8_DIR16, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
special, /* special_function */
|
||
"R_H8_DIR16", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0x0000ffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
#define R_H8_DIR8_X (R_H8_DIR16_X + 1)
|
||
HOWTO (R_H8_DIR8, /* type */
|
||
0, /* rightshift */
|
||
0, /* size (0 = byte, 1 = short, 2 = long) */
|
||
8, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
special, /* special_function */
|
||
"R_H8_DIR16", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0x000000ff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
#define R_H8_DIR16A8_X (R_H8_DIR8_X + 1)
|
||
HOWTO (R_H8_DIR16A8, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
special, /* special_function */
|
||
"R_H8_DIR16A8", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0x0000ffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
#define R_H8_DIR16R8_X (R_H8_DIR16A8_X + 1)
|
||
HOWTO (R_H8_DIR16R8, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
special, /* special_function */
|
||
"R_H8_DIR16R8", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0x0000ffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
#define R_H8_DIR24A8_X (R_H8_DIR16R8_X + 1)
|
||
HOWTO (R_H8_DIR24A8, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
24, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
special, /* special_function */
|
||
"R_H8_DIR24A8", /* name */
|
||
true, /* partial_inplace */
|
||
0xff000000, /* src_mask */
|
||
0x00ffffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
#define R_H8_DIR24R8_X (R_H8_DIR24A8_X + 1)
|
||
HOWTO (R_H8_DIR24R8, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
24, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
special, /* special_function */
|
||
"R_H8_DIR24R8", /* name */
|
||
true, /* partial_inplace */
|
||
0xff000000, /* src_mask */
|
||
0x00ffffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
#define R_H8_DIR32A16_X (R_H8_DIR24R8_X + 1)
|
||
HOWTO (R_H8_DIR32A16, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
special, /* special_function */
|
||
"R_H8_DIR32", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
#define R_H8_PCREL16_X (R_H8_DIR32A16_X + 1)
|
||
HOWTO (R_H8_PCREL16, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
special, /* special_function */
|
||
"R_H8_PCREL16", /* name */
|
||
false, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
#define R_H8_PCREL8_X (R_H8_PCREL16_X + 1)
|
||
HOWTO (R_H8_PCREL8, /* type */
|
||
0, /* rightshift */
|
||
0, /* size (0 = byte, 1 = short, 2 = long) */
|
||
8, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
special, /* special_function */
|
||
"R_H8_PCREL8", /* name */
|
||
false, /* partial_inplace */
|
||
0xff, /* src_mask */
|
||
0xff, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
};
|
||
|
||
/* This structure is used to map BFD reloc codes to H8 ELF relocs. */
|
||
|
||
struct elf_reloc_map
|
||
{
|
||
bfd_reloc_code_real_type bfd_reloc_val;
|
||
unsigned char howto_index;
|
||
};
|
||
|
||
/* An array mapping BFD reloc codes to SH ELF relocs. */
|
||
|
||
static const struct elf_reloc_map h8_reloc_map[] =
|
||
{
|
||
{ BFD_RELOC_NONE, R_H8_NONE_X },
|
||
{ BFD_RELOC_32, R_H8_DIR32_X },
|
||
{ BFD_RELOC_16, R_H8_DIR16_X },
|
||
{ BFD_RELOC_8, R_H8_DIR8_X },
|
||
{ BFD_RELOC_H8_DIR16A8, R_H8_DIR16A8_X },
|
||
{ BFD_RELOC_H8_DIR16R8, R_H8_DIR16R8_X },
|
||
{ BFD_RELOC_H8_DIR24A8, R_H8_DIR24A8_X },
|
||
{ BFD_RELOC_H8_DIR24R8, R_H8_DIR24R8_X },
|
||
{ BFD_RELOC_H8_DIR32A16, R_H8_DIR32A16_X },
|
||
{ BFD_RELOC_16_PCREL, R_H8_PCREL16_X },
|
||
{ BFD_RELOC_8_PCREL, R_H8_PCREL8_X },
|
||
};
|
||
|
||
|
||
static reloc_howto_type *
|
||
elf32_h8_reloc_type_lookup (abfd, code)
|
||
bfd *abfd ATTRIBUTE_UNUSED;
|
||
bfd_reloc_code_real_type code;
|
||
{
|
||
unsigned int i;
|
||
|
||
for (i = 0; i < sizeof (h8_reloc_map) / sizeof (struct elf_reloc_map); i++)
|
||
{
|
||
if (h8_reloc_map[i].bfd_reloc_val == code)
|
||
return &h8_elf_howto_table[(int) h8_reloc_map[i].howto_index];
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
static void
|
||
elf32_h8_info_to_howto (abfd, bfd_reloc, elf_reloc)
|
||
bfd *abfd ATTRIBUTE_UNUSED;
|
||
arelent *bfd_reloc;
|
||
Elf32_Internal_Rela *elf_reloc;
|
||
{
|
||
unsigned int r;
|
||
unsigned int i;
|
||
|
||
r = ELF32_R_TYPE (elf_reloc->r_info);
|
||
for (i = 0; i < sizeof (h8_elf_howto_table) / sizeof (reloc_howto_type); i++)
|
||
if (h8_elf_howto_table[i].type== r)
|
||
{
|
||
bfd_reloc->howto = &h8_elf_howto_table[i];
|
||
return;
|
||
}
|
||
abort ();
|
||
}
|
||
|
||
static void
|
||
elf32_h8_info_to_howto_rel (abfd, bfd_reloc, elf_reloc)
|
||
bfd *abfd ATTRIBUTE_UNUSED;
|
||
arelent *bfd_reloc;
|
||
Elf32_Internal_Rel *elf_reloc ATTRIBUTE_UNUSED;
|
||
{
|
||
unsigned int r;
|
||
|
||
abort ();
|
||
r = ELF32_R_TYPE (elf_reloc->r_info);
|
||
bfd_reloc->howto = &h8_elf_howto_table[r];
|
||
}
|
||
|
||
/* Special handling for H8/300 relocs.
|
||
We only come here for pcrel stuff and return normally if not an -r link.
|
||
When doing -r, we can't do any arithmetic for the pcrel stuff, because
|
||
we support relaxing on the H8/300 series chips. */
|
||
static bfd_reloc_status_type
|
||
special (abfd, reloc_entry, symbol, data, input_section, output_bfd,
|
||
error_message)
|
||
bfd *abfd ATTRIBUTE_UNUSED;
|
||
arelent *reloc_entry ATTRIBUTE_UNUSED;
|
||
asymbol *symbol ATTRIBUTE_UNUSED;
|
||
PTR data ATTRIBUTE_UNUSED;
|
||
asection *input_section ATTRIBUTE_UNUSED;
|
||
bfd *output_bfd;
|
||
char **error_message ATTRIBUTE_UNUSED;
|
||
{
|
||
if (output_bfd == (bfd *) NULL)
|
||
return bfd_reloc_continue;
|
||
|
||
/* Adjust the reloc address to that in the output section. */
|
||
reloc_entry->address += input_section->output_offset;
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
/* Perform a relocation as part of a final link. */
|
||
static bfd_reloc_status_type
|
||
elf32_h8_final_link_relocate (r_type, input_bfd, output_bfd,
|
||
input_section, contents, offset, value,
|
||
addend, info, sym_sec, is_local)
|
||
unsigned long r_type;
|
||
bfd *input_bfd;
|
||
bfd *output_bfd ATTRIBUTE_UNUSED;
|
||
asection *input_section ATTRIBUTE_UNUSED;
|
||
bfd_byte *contents;
|
||
bfd_vma offset;
|
||
bfd_vma value;
|
||
bfd_vma addend;
|
||
struct bfd_link_info *info ATTRIBUTE_UNUSED;
|
||
asection *sym_sec ATTRIBUTE_UNUSED;
|
||
int is_local ATTRIBUTE_UNUSED;
|
||
{
|
||
bfd_byte *hit_data = contents + offset;
|
||
|
||
switch (r_type)
|
||
{
|
||
|
||
case R_H8_NONE:
|
||
return bfd_reloc_ok;
|
||
|
||
case R_H8_DIR32:
|
||
case R_H8_DIR32A16:
|
||
case R_H8_DIR24A8:
|
||
value += addend;
|
||
bfd_put_32 (input_bfd, value, hit_data);
|
||
return bfd_reloc_ok;
|
||
|
||
case R_H8_DIR16:
|
||
case R_H8_DIR16A8:
|
||
case R_H8_DIR16R8:
|
||
value += addend;
|
||
bfd_put_16 (input_bfd, value, hit_data);
|
||
return bfd_reloc_ok;
|
||
|
||
/* AKA R_RELBYTE */
|
||
case R_H8_DIR8:
|
||
value += addend;
|
||
|
||
bfd_put_8 (input_bfd, value, hit_data);
|
||
return bfd_reloc_ok;
|
||
|
||
case R_H8_DIR24R8:
|
||
value += addend;
|
||
|
||
/* HIT_DATA is the address for the first byte for the relocated
|
||
value. Subtract 1 so that we can manipulate the data in 32bit
|
||
hunks. */
|
||
hit_data--;
|
||
|
||
/* Clear out the top byte in value. */
|
||
value &= 0xffffff;
|
||
|
||
/* Retrieve the type byte for value from the section contents. */
|
||
value |= (bfd_get_32 (input_bfd, hit_data) & 0xff000000);
|
||
|
||
/* Now scribble it out in one 32bit hunk. */
|
||
bfd_put_32 (input_bfd, value, hit_data);
|
||
return bfd_reloc_ok;
|
||
|
||
case R_H8_PCREL16:
|
||
value -= (input_section->output_section->vma
|
||
+ input_section->output_offset);
|
||
value -= offset;
|
||
value += addend;
|
||
|
||
/* The value is relative to the start of the instruction,
|
||
not the relocation offset. Subtract 2 to account for
|
||
this minor issue. */
|
||
value -= 2;
|
||
|
||
bfd_put_16 (input_bfd, value, hit_data);
|
||
return bfd_reloc_ok;
|
||
|
||
case R_H8_PCREL8:
|
||
value -= (input_section->output_section->vma
|
||
+ input_section->output_offset);
|
||
value -= offset;
|
||
value += addend;
|
||
|
||
/* The value is relative to the start of the instruction,
|
||
not the relocation offset. Subtract 1 to account for
|
||
this minor issue. */
|
||
value -= 1;
|
||
|
||
bfd_put_8 (input_bfd, value, hit_data);
|
||
return bfd_reloc_ok;
|
||
|
||
default:
|
||
return bfd_reloc_notsupported;
|
||
}
|
||
}
|
||
|
||
/* Relocate an H8 ELF section. */
|
||
static boolean
|
||
elf32_h8_relocate_section (output_bfd, info, input_bfd, input_section,
|
||
contents, relocs, local_syms, local_sections)
|
||
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;
|
||
{
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
struct elf_link_hash_entry **sym_hashes;
|
||
Elf_Internal_Rela *rel, *relend;
|
||
|
||
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
||
sym_hashes = elf_sym_hashes (input_bfd);
|
||
|
||
rel = relocs;
|
||
relend = relocs + input_section->reloc_count;
|
||
for (; rel < relend; rel++)
|
||
{
|
||
int r_type;
|
||
unsigned long r_symndx;
|
||
Elf_Internal_Sym *sym;
|
||
asection *sec;
|
||
struct elf_link_hash_entry *h;
|
||
bfd_vma relocation;
|
||
bfd_reloc_status_type r;
|
||
|
||
r_symndx = ELF32_R_SYM (rel->r_info);
|
||
r_type = ELF32_R_TYPE (rel->r_info);
|
||
|
||
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 < symtab_hdr->sh_info)
|
||
{
|
||
sym = local_syms + r_symndx;
|
||
if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
|
||
{
|
||
sec = local_sections[r_symndx];
|
||
rel->r_addend += sec->output_offset + sym->st_value;
|
||
}
|
||
}
|
||
|
||
continue;
|
||
}
|
||
|
||
/* This is a final link. */
|
||
h = NULL;
|
||
sym = NULL;
|
||
sec = NULL;
|
||
if (r_symndx < symtab_hdr->sh_info)
|
||
{
|
||
sym = local_syms + r_symndx;
|
||
sec = local_sections[r_symndx];
|
||
relocation = (sec->output_section->vma
|
||
+ sec->output_offset
|
||
+ sym->st_value);
|
||
}
|
||
else
|
||
{
|
||
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
||
while (h->root.type == bfd_link_hash_indirect
|
||
|| h->root.type == bfd_link_hash_warning)
|
||
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
||
if (h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak)
|
||
{
|
||
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_undefweak)
|
||
relocation = 0;
|
||
else
|
||
{
|
||
if (! ((*info->callbacks->undefined_symbol)
|
||
(info, h->root.root.string, input_bfd,
|
||
input_section, rel->r_offset, true)))
|
||
return false;
|
||
relocation = 0;
|
||
}
|
||
}
|
||
|
||
r = elf32_h8_final_link_relocate (r_type, input_bfd, output_bfd,
|
||
input_section,
|
||
contents, rel->r_offset,
|
||
relocation, rel->r_addend,
|
||
info, sec, h == NULL);
|
||
|
||
if (r != bfd_reloc_ok)
|
||
{
|
||
const char *name;
|
||
const char *msg = (const char *) 0;
|
||
arelent bfd_reloc;
|
||
reloc_howto_type *howto;
|
||
|
||
elf32_h8_info_to_howto (input_bfd, &bfd_reloc, rel);
|
||
howto = bfd_reloc.howto;
|
||
|
||
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);
|
||
}
|
||
|
||
switch (r)
|
||
{
|
||
case bfd_reloc_overflow:
|
||
if (! ((*info->callbacks->reloc_overflow)
|
||
(info, name, howto->name, (bfd_vma) 0,
|
||
input_bfd, input_section, rel->r_offset)))
|
||
return false;
|
||
break;
|
||
|
||
case bfd_reloc_undefined:
|
||
if (! ((*info->callbacks->undefined_symbol)
|
||
(info, name, input_bfd, input_section,
|
||
rel->r_offset, true)))
|
||
return false;
|
||
break;
|
||
|
||
case bfd_reloc_outofrange:
|
||
msg = _("internal error: out of range error");
|
||
goto common_error;
|
||
|
||
case bfd_reloc_notsupported:
|
||
msg = _("internal error: unsupported relocation error");
|
||
goto common_error;
|
||
|
||
case bfd_reloc_dangerous:
|
||
msg = _("internal error: dangerous error");
|
||
goto common_error;
|
||
|
||
default:
|
||
msg = _("internal error: unknown error");
|
||
/* fall through */
|
||
|
||
common_error:
|
||
if (!((*info->callbacks->warning)
|
||
(info, msg, name, input_bfd, input_section,
|
||
rel->r_offset)))
|
||
return false;
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Object files encode the specific H8 model they were compiled
|
||
for in the ELF flags field.
|
||
|
||
Examine that field and return the proper BFD machine type for
|
||
the object file. */
|
||
static int
|
||
elf32_h8_mach (flags)
|
||
flagword flags;
|
||
{
|
||
switch (flags & EF_H8_MACH)
|
||
{
|
||
case E_H8_MACH_H8300:
|
||
default:
|
||
return bfd_mach_h8300;
|
||
|
||
case E_H8_MACH_H8300H:
|
||
return bfd_mach_h8300h;
|
||
|
||
case E_H8_MACH_H8300S:
|
||
return bfd_mach_h8300s;
|
||
}
|
||
}
|
||
|
||
/* The final processing done just before writing out a H8 ELF object
|
||
file. We use this opportunity to encode the BFD machine type
|
||
into the flags field in the object file. */
|
||
|
||
void
|
||
elf32_h8_final_write_processing (abfd, linker)
|
||
bfd *abfd;
|
||
boolean linker ATTRIBUTE_UNUSED;
|
||
{
|
||
unsigned long val;
|
||
|
||
switch (bfd_get_mach (abfd))
|
||
{
|
||
default:
|
||
case bfd_mach_h8300:
|
||
val = E_H8_MACH_H8300;
|
||
break;
|
||
|
||
case bfd_mach_h8300h:
|
||
val = E_H8_MACH_H8300H;
|
||
break;
|
||
|
||
case bfd_mach_h8300s:
|
||
val = E_H8_MACH_H8300S;
|
||
break;
|
||
}
|
||
|
||
elf_elfheader (abfd)->e_flags &= ~ (EF_H8_MACH);
|
||
elf_elfheader (abfd)->e_flags |= val;
|
||
}
|
||
|
||
/* Return nonzero if ABFD represents a valid H8 ELF object file; also
|
||
record the encoded machine type found in the ELF flags. */
|
||
|
||
boolean
|
||
elf32_h8_object_p (abfd)
|
||
bfd *abfd;
|
||
{
|
||
bfd_default_set_arch_mach (abfd, bfd_arch_h8300,
|
||
elf32_h8_mach (elf_elfheader (abfd)->e_flags));
|
||
return true;
|
||
}
|
||
|
||
/* Merge backend specific data from an object file to the output
|
||
object file when linking. The only data we need to copy at this
|
||
time is the architecture/machine information. */
|
||
|
||
boolean
|
||
elf32_h8_merge_private_bfd_data (ibfd, obfd)
|
||
bfd *ibfd;
|
||
bfd *obfd;
|
||
{
|
||
if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|
||
|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
|
||
return true;
|
||
|
||
if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
|
||
&& bfd_get_mach (obfd) < bfd_get_mach (ibfd))
|
||
{
|
||
if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
|
||
bfd_get_mach (ibfd)))
|
||
return false;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* This function handles relaxing for the H8..
|
||
|
||
There's a few relaxing opportunites available on the H8:
|
||
|
||
jmp/jsr:24 -> bra/bsr:8 2 bytes
|
||
The jmp may be completely eliminated if the previous insn is a
|
||
conditional branch to the insn after the jump. In that case
|
||
we invert the branch and delete the jump and save 4 bytes.
|
||
|
||
bCC:16 -> bCC:8 2 bytes
|
||
bsr:16 -> bsr:8 2 bytes
|
||
|
||
mov.b:16 -> mov.b:8 2 bytes
|
||
mov.b:24/32 -> mov.b:8 4 bytes
|
||
|
||
mov.[bwl]:24/32 -> mov.[bwl]:16 2 bytes
|
||
|
||
|
||
*/
|
||
|
||
static boolean
|
||
elf32_h8_relax_section (abfd, sec, link_info, again)
|
||
bfd *abfd;
|
||
asection *sec;
|
||
struct bfd_link_info *link_info;
|
||
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;
|
||
Elf32_External_Sym *extsyms = NULL;
|
||
Elf32_External_Sym *free_extsyms = NULL;
|
||
static asection *last_input_section = NULL;
|
||
static Elf_Internal_Rela *last_reloc = NULL;
|
||
|
||
/* Assume nothing changes. */
|
||
*again = false;
|
||
|
||
/* We don't have to do anything for a relocateable link, if
|
||
this section does not have relocs, or if this is not a
|
||
code section. */
|
||
if (link_info->relocateable
|
||
|| (sec->flags & SEC_RELOC) == 0
|
||
|| sec->reloc_count == 0
|
||
|| (sec->flags & SEC_CODE) == 0)
|
||
return true;
|
||
|
||
/* If this is the first time we have been called for this section,
|
||
initialize the cooked size. */
|
||
if (sec->_cooked_size == 0)
|
||
sec->_cooked_size = sec->_raw_size;
|
||
|
||
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
||
|
||
/* Get a copy of the native relocations. */
|
||
internal_relocs = (_bfd_elf32_link_read_relocs
|
||
(abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
|
||
link_info->keep_memory));
|
||
if (internal_relocs == NULL)
|
||
goto error_return;
|
||
if (! link_info->keep_memory)
|
||
free_relocs = internal_relocs;
|
||
|
||
if (sec != last_input_section)
|
||
last_reloc = NULL;
|
||
|
||
last_input_section = sec;
|
||
|
||
/* Walk through the relocs looking for relaxing opportunities. */
|
||
irelend = internal_relocs + sec->reloc_count;
|
||
for (irel = internal_relocs; irel < irelend; irel++)
|
||
{
|
||
bfd_vma symval;
|
||
|
||
/* Keep track of the previous reloc so that we can delete
|
||
some long jumps created by the compiler. */
|
||
if (irel != internal_relocs)
|
||
last_reloc = irel - 1;
|
||
|
||
/* Get the section contents if we haven't done so already. */
|
||
if (contents == NULL)
|
||
{
|
||
/* Get cached copy if it exists. */
|
||
if (elf_section_data (sec)->this_hdr.contents != NULL)
|
||
contents = elf_section_data (sec)->this_hdr.contents;
|
||
else
|
||
{
|
||
/* Go get them off disk. */
|
||
contents = (bfd_byte *) bfd_malloc (sec->_raw_size);
|
||
if (contents == NULL)
|
||
goto error_return;
|
||
free_contents = contents;
|
||
|
||
if (! bfd_get_section_contents (abfd, sec, contents,
|
||
(file_ptr) 0, sec->_raw_size))
|
||
goto error_return;
|
||
}
|
||
}
|
||
|
||
/* Read this BFD's symbols if we haven't done so already. */
|
||
if (extsyms == NULL)
|
||
{
|
||
/* Get cached copy if it exists. */
|
||
if (symtab_hdr->contents != NULL)
|
||
extsyms = (Elf32_External_Sym *) symtab_hdr->contents;
|
||
else
|
||
{
|
||
/* Go get them off disk. */
|
||
extsyms = ((Elf32_External_Sym *)
|
||
bfd_malloc (symtab_hdr->sh_size));
|
||
if (extsyms == NULL)
|
||
goto error_return;
|
||
free_extsyms = extsyms;
|
||
if (bfd_seek (abfd, symtab_hdr->sh_offset, SEEK_SET) != 0
|
||
|| (bfd_read (extsyms, 1, symtab_hdr->sh_size, abfd)
|
||
!= symtab_hdr->sh_size))
|
||
goto error_return;
|
||
}
|
||
}
|
||
|
||
/* Get the value of the symbol referred to by the reloc. */
|
||
if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
|
||
{
|
||
Elf_Internal_Sym isym;
|
||
asection *sym_sec;
|
||
|
||
/* A local symbol. */
|
||
bfd_elf32_swap_symbol_in (abfd,
|
||
extsyms + ELF32_R_SYM (irel->r_info),
|
||
&isym);
|
||
|
||
sym_sec = bfd_section_from_elf_index (abfd, isym.st_shndx);
|
||
symval = (isym.st_value
|
||
+ sym_sec->output_section->vma
|
||
+ sym_sec->output_offset);
|
||
}
|
||
else
|
||
{
|
||
unsigned long indx;
|
||
struct elf_link_hash_entry *h;
|
||
|
||
/* An external symbol. */
|
||
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);
|
||
}
|
||
|
||
/* For simplicity of coding, we are going to modify the section
|
||
contents, the section relocs, and the BFD symbol table. We
|
||
must tell the rest of the code not to free up this
|
||
information. It would be possible to instead create a table
|
||
of changes which have to be made, as is done in coff-mips.c;
|
||
that would be more work, but would require less memory when
|
||
the linker is run. */
|
||
switch (ELF32_R_TYPE (irel->r_info))
|
||
{
|
||
/* Try to turn a 24 bit absolute branch/call into an 8 bit
|
||
pc-relative branch/call. */
|
||
case R_H8_DIR24R8:
|
||
{
|
||
bfd_vma value = symval + irel->r_addend;
|
||
bfd_vma dot, gap;
|
||
|
||
/* Get the address of this instruction. */
|
||
dot = (sec->output_section->vma
|
||
+ sec->output_offset + irel->r_offset - 1);
|
||
|
||
/* Compute the distance from this insn to the branch target. */
|
||
gap = value - dot;
|
||
|
||
/* If the distance is within -126..+130 inclusive, then we can
|
||
relax this jump. +130 is valid since the target will move
|
||
two bytes closer if we do relax this branch. */
|
||
if ((int)gap >= -126 && (int)gap <= 130)
|
||
{
|
||
unsigned char code;
|
||
|
||
/* Note that we've changed the relocs, section contents,
|
||
etc. */
|
||
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 *) extsyms;
|
||
free_extsyms = NULL;
|
||
|
||
/* If the previous instruction conditionally jumped around
|
||
this instruction, we may be able to reverse the condition
|
||
and redirect the previous instruction to the target of
|
||
this instruction.
|
||
|
||
Such sequences are used by the compiler to deal with
|
||
long conditional branches. */
|
||
if (gap <= 130
|
||
&& gap >= -128
|
||
&& last_reloc
|
||
&& ELF32_R_TYPE (last_reloc->r_info) == R_H8_PCREL8
|
||
&& ELF32_R_SYM (last_reloc->r_info) < symtab_hdr->sh_info)
|
||
{
|
||
bfd_vma last_value;
|
||
asection *last_sym_sec;
|
||
Elf_Internal_Sym last_symbol;
|
||
|
||
/* We will need to examine the symbol used by the
|
||
previous relocation. */
|
||
|
||
bfd_elf32_swap_symbol_in (abfd,
|
||
(extsyms + ELF32_R_SYM (last_reloc->r_info)),
|
||
&last_symbol);
|
||
|
||
last_sym_sec
|
||
= bfd_section_from_elf_index (abfd, last_symbol.st_shndx);
|
||
last_value = (last_symbol.st_value
|
||
+ last_sym_sec->output_section->vma
|
||
+ last_sym_sec->output_offset);
|
||
|
||
/* Verify that the previous relocation was for a
|
||
branch around this instruction and that no symbol
|
||
exists at the current location. */
|
||
if (last_value == dot + 4
|
||
&& last_reloc->r_offset + 2 == irel->r_offset
|
||
&& ! elf32_h8_symbol_address_p (abfd, sec,
|
||
extsyms, dot))
|
||
{
|
||
/* We can eliminate this jump. Twiddle the
|
||
previous relocation as necessary. */
|
||
irel->r_info
|
||
= ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
||
ELF32_R_TYPE (R_H8_NONE));
|
||
|
||
last_reloc->r_info
|
||
= ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
||
ELF32_R_TYPE (R_H8_PCREL8));
|
||
last_reloc->r_addend = irel->r_addend;
|
||
|
||
|
||
code = bfd_get_8 (abfd,
|
||
contents + last_reloc->r_offset - 1);
|
||
code ^= 1;
|
||
bfd_put_8 (abfd,
|
||
code,
|
||
contents + last_reloc->r_offset - 1);
|
||
|
||
/* Delete four bytes of data. */
|
||
if (!elf32_h8_relax_delete_bytes (abfd, sec,
|
||
irel->r_offset - 1,
|
||
4))
|
||
goto error_return;
|
||
|
||
*again = true;
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* We could not eliminate this jump, so just shorten it. */
|
||
code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
|
||
|
||
if (code == 0x5e)
|
||
bfd_put_8 (abfd, 0x55, contents + irel->r_offset - 1);
|
||
else if (code == 0x5a)
|
||
bfd_put_8 (abfd, 0x40, contents + irel->r_offset - 1);
|
||
else
|
||
abort ();
|
||
|
||
/* Fix the relocation's type. */
|
||
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
||
R_H8_PCREL8);
|
||
|
||
/* Delete two bytes of data. */
|
||
if (!elf32_h8_relax_delete_bytes (abfd, sec,
|
||
irel->r_offset + 1, 2))
|
||
goto error_return;
|
||
|
||
/* That will change things, so, we should relax again.
|
||
Note that this is not required, and it may be slow. */
|
||
*again = true;
|
||
}
|
||
break;
|
||
}
|
||
|
||
/* Try to turn a 16bit pc-relative branch into a 8bit pc-relative
|
||
branch. */
|
||
case R_H8_PCREL16:
|
||
{
|
||
bfd_vma value = symval + irel->r_addend;
|
||
bfd_vma dot;
|
||
bfd_vma gap;
|
||
|
||
/* Get the address of this instruction. */
|
||
dot = (sec->output_section->vma
|
||
+ sec->output_offset
|
||
+ irel->r_offset - 2);
|
||
|
||
gap = value - dot;
|
||
|
||
/* If the distance is within -126..+130 inclusive, then we can
|
||
relax this jump. +130 is valid since the target will move
|
||
two bytes closer if we do relax this branch. */
|
||
if ((int)gap >= -126 && (int)gap <= 130)
|
||
{
|
||
unsigned char code;
|
||
|
||
/* Note that we've changed the relocs, section contents,
|
||
etc. */
|
||
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 *) extsyms;
|
||
free_extsyms = NULL;
|
||
|
||
/* Get the opcode. */
|
||
code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
|
||
|
||
if (code == 0x58)
|
||
{
|
||
/* bCC:16 -> bCC:8 */
|
||
/* Get the condition code from the original insn. */
|
||
code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
|
||
code &= 0xf0;
|
||
code >>= 4;
|
||
code |= 0x40;
|
||
bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
|
||
}
|
||
else if (code == 0x5c)
|
||
bfd_put_8 (abfd, 0x55, contents + irel->r_offset - 2);
|
||
else
|
||
abort ();
|
||
|
||
/* Fix the relocation's type. */
|
||
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
||
R_H8_PCREL8);
|
||
irel->r_offset--;
|
||
|
||
/* Delete two bytes of data. */
|
||
if (!elf32_h8_relax_delete_bytes (abfd, sec,
|
||
irel->r_offset + 1, 2))
|
||
goto error_return;
|
||
|
||
/* That will change things, so, we should relax again.
|
||
Note that this is not required, and it may be slow. */
|
||
*again = true;
|
||
}
|
||
break;
|
||
}
|
||
|
||
/* This is a 16 bit absolute address in a "mov.b" insn, which may
|
||
become an 8 bit absolute address if its in the right range. */
|
||
case R_H8_DIR16A8:
|
||
{
|
||
bfd_vma value = symval + irel->r_addend;
|
||
|
||
if ((bfd_get_mach (abfd) == bfd_mach_h8300
|
||
&& value >= 0xff00
|
||
&& value <= 0xffff)
|
||
|| ((bfd_get_mach (abfd) == bfd_mach_h8300h
|
||
|| bfd_get_mach (abfd) == bfd_mach_h8300s)
|
||
&& value >= 0xffff00
|
||
&& value <= 0xffffff))
|
||
{
|
||
unsigned char code;
|
||
|
||
/* Note that we've changed the relocs, section contents,
|
||
etc. */
|
||
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 *) extsyms;
|
||
free_extsyms = NULL;
|
||
|
||
/* Get the opcode. */
|
||
code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
|
||
|
||
/* Sanity check. */
|
||
if (code != 0x6a)
|
||
abort ();
|
||
|
||
code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
|
||
|
||
if ((code & 0xf0) == 0x00)
|
||
bfd_put_8 (abfd,
|
||
(code & 0xf) | 0x20,
|
||
contents + irel->r_offset - 2);
|
||
else if ((code & 0xf0) == 0x80)
|
||
bfd_put_8 (abfd,
|
||
(code & 0xf) | 0x30,
|
||
contents + irel->r_offset - 2);
|
||
else
|
||
abort ();
|
||
|
||
/* Fix the relocation's type. */
|
||
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
||
R_H8_DIR8);
|
||
|
||
/* Delete two bytes of data. */
|
||
if (!elf32_h8_relax_delete_bytes (abfd, sec,
|
||
irel->r_offset + 1, 2))
|
||
goto error_return;
|
||
|
||
/* That will change things, so, we should relax again.
|
||
Note that this is not required, and it may be slow. */
|
||
*again = true;
|
||
}
|
||
break;
|
||
}
|
||
|
||
/* This is a 24 bit absolute address in a "mov.b" insn, which may
|
||
become an 8 bit absolute address if its in the right range. */
|
||
case R_H8_DIR24A8:
|
||
{
|
||
bfd_vma value = symval + irel->r_addend;
|
||
|
||
if ((bfd_get_mach (abfd) == bfd_mach_h8300
|
||
&& value >= 0xff00
|
||
&& value <= 0xffff)
|
||
|| ((bfd_get_mach (abfd) == bfd_mach_h8300h
|
||
|| bfd_get_mach (abfd) == bfd_mach_h8300s)
|
||
&& value >= 0xffff00
|
||
&& value <= 0xffffff))
|
||
{
|
||
unsigned char code;
|
||
|
||
/* Note that we've changed the relocs, section contents,
|
||
etc. */
|
||
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 *) extsyms;
|
||
free_extsyms = NULL;
|
||
|
||
/* Get the opcode. */
|
||
code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
|
||
|
||
/* Sanity check. */
|
||
if (code != 0x6a)
|
||
abort ();
|
||
|
||
code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
|
||
|
||
if ((code & 0xf0) == 0x00)
|
||
bfd_put_8 (abfd,
|
||
(code & 0xf) | 0x20,
|
||
contents + irel->r_offset - 2);
|
||
else if ((code & 0xf0) == 0x80)
|
||
bfd_put_8 (abfd,
|
||
(code & 0xf) | 0x30,
|
||
contents + irel->r_offset - 2);
|
||
else
|
||
abort ();
|
||
|
||
/* Fix the relocation's type. */
|
||
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
||
R_H8_DIR8);
|
||
|
||
/* Delete two bytes of data. */
|
||
if (!elf32_h8_relax_delete_bytes (abfd, sec, irel->r_offset, 2))
|
||
goto error_return;
|
||
|
||
/* That will change things, so, we should relax again.
|
||
Note that this is not required, and it may be slow. */
|
||
*again = true;
|
||
}
|
||
}
|
||
|
||
/* FALLTHRU */
|
||
|
||
/* This is a 24/32bit absolute address in a "mov" insn, which may
|
||
become a 16bit absoulte address if it is in the right range. */
|
||
case R_H8_DIR32A16:
|
||
{
|
||
bfd_vma value = symval + irel->r_addend;
|
||
|
||
if (value <= 0x7fff || value >= 0xff8000)
|
||
{
|
||
unsigned char code;
|
||
|
||
/* Note that we've changed the relocs, section contents,
|
||
etc. */
|
||
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 *) extsyms;
|
||
free_extsyms = NULL;
|
||
|
||
/* Get the opcode. */
|
||
code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
|
||
|
||
/* We just need to turn off bit 0x20. */
|
||
code &= ~0x20;
|
||
|
||
bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
|
||
|
||
/* Fix the relocation's type. */
|
||
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
||
R_H8_DIR16A8);
|
||
|
||
/* Delete two bytes of data. */
|
||
if (!elf32_h8_relax_delete_bytes (abfd, sec,
|
||
irel->r_offset + 1, 2))
|
||
goto error_return;
|
||
|
||
/* That will change things, so, we should relax again.
|
||
Note that this is not required, and it may be slow. */
|
||
*again = true;
|
||
}
|
||
break;
|
||
}
|
||
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
|
||
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 (free_extsyms != NULL)
|
||
{
|
||
if (! link_info->keep_memory)
|
||
free (free_extsyms);
|
||
else
|
||
{
|
||
/* Cache the symbols for elf_link_input_bfd. */
|
||
symtab_hdr->contents = extsyms;
|
||
}
|
||
free_extsyms = NULL;
|
||
}
|
||
|
||
return true;
|
||
|
||
error_return:
|
||
if (free_relocs != NULL)
|
||
free (free_relocs);
|
||
if (free_contents != NULL)
|
||
free (free_contents);
|
||
if (free_extsyms != NULL)
|
||
free (free_extsyms);
|
||
return false;
|
||
}
|
||
|
||
/* Delete some bytes from a section while relaxing. */
|
||
|
||
static boolean
|
||
elf32_h8_relax_delete_bytes (abfd, sec, addr, count)
|
||
bfd *abfd;
|
||
asection *sec;
|
||
bfd_vma addr;
|
||
int count;
|
||
{
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
Elf32_External_Sym *extsyms;
|
||
int shndx, index;
|
||
bfd_byte *contents;
|
||
Elf_Internal_Rela *irel, *irelend;
|
||
Elf_Internal_Rela *irelalign;
|
||
bfd_vma toaddr;
|
||
Elf32_External_Sym *esym, *esymend;
|
||
struct elf_link_hash_entry *sym_hash;
|
||
|
||
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
||
extsyms = (Elf32_External_Sym *) symtab_hdr->contents;
|
||
|
||
shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
|
||
|
||
contents = elf_section_data (sec)->this_hdr.contents;
|
||
|
||
/* The deletion must stop at the next ALIGN reloc for an aligment
|
||
power larger than the number of bytes we are deleting. */
|
||
|
||
irelalign = NULL;
|
||
toaddr = sec->_cooked_size;
|
||
|
||
irel = elf_section_data (sec)->relocs;
|
||
irelend = irel + sec->reloc_count;
|
||
|
||
/* Actually delete the bytes. */
|
||
memmove (contents + addr, contents + addr + count, toaddr - addr - count);
|
||
sec->_cooked_size -= count;
|
||
|
||
/* Adjust all the relocs. */
|
||
for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
|
||
{
|
||
/* Get the new reloc address. */
|
||
if ((irel->r_offset > addr
|
||
&& irel->r_offset < toaddr))
|
||
irel->r_offset -= count;
|
||
}
|
||
|
||
/* Adjust the local symbols defined in this section. */
|
||
esym = extsyms;
|
||
esymend = esym + symtab_hdr->sh_info;
|
||
for (; esym < esymend; esym++)
|
||
{
|
||
Elf_Internal_Sym isym;
|
||
|
||
bfd_elf32_swap_symbol_in (abfd, esym, &isym);
|
||
|
||
if (isym.st_shndx == shndx
|
||
&& isym.st_value > addr
|
||
&& isym.st_value < toaddr)
|
||
{
|
||
isym.st_value -= count;
|
||
bfd_elf32_swap_symbol_out (abfd, &isym, esym);
|
||
}
|
||
}
|
||
|
||
/* Now adjust the global symbols defined in this section. */
|
||
esym = extsyms + symtab_hdr->sh_info;
|
||
esymend = extsyms + (symtab_hdr->sh_size / sizeof (Elf32_External_Sym));
|
||
for (index = 0; esym < esymend; esym++, index++)
|
||
{
|
||
Elf_Internal_Sym isym;
|
||
|
||
bfd_elf32_swap_symbol_in (abfd, esym, &isym);
|
||
sym_hash = elf_sym_hashes (abfd)[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 > addr
|
||
&& (sym_hash)->root.u.def.value < toaddr)
|
||
{
|
||
(sym_hash)->root.u.def.value -= count;
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Return true if a symbol exists at the given address, else return
|
||
false. */
|
||
static boolean
|
||
elf32_h8_symbol_address_p (abfd, sec, extsyms, addr)
|
||
bfd *abfd;
|
||
asection *sec;
|
||
Elf32_External_Sym *extsyms;
|
||
bfd_vma addr;
|
||
{
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
int shndx;
|
||
Elf32_External_Sym *esym, *esymend;
|
||
struct elf_link_hash_entry **sym_hash, **sym_hash_end;
|
||
|
||
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
||
shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
|
||
|
||
/* Examine all the symbols. */
|
||
esym = extsyms;
|
||
esymend = esym + symtab_hdr->sh_info;
|
||
for (; esym < esymend; esym++)
|
||
{
|
||
Elf_Internal_Sym isym;
|
||
|
||
bfd_elf32_swap_symbol_in (abfd, esym, &isym);
|
||
|
||
if (isym.st_shndx == shndx
|
||
&& isym.st_value == addr)
|
||
return true;
|
||
}
|
||
|
||
sym_hash = elf_sym_hashes (abfd);
|
||
sym_hash_end = (sym_hash
|
||
+ (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
|
||
- symtab_hdr->sh_info));
|
||
for (; sym_hash < sym_hash_end; sym_hash++)
|
||
{
|
||
if (((*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 == addr)
|
||
return true;
|
||
}
|
||
return false;
|
||
}
|
||
|
||
/* This is a version of bfd_generic_get_relocated_section_contents
|
||
which uses elf32_h8_relocate_section. */
|
||
|
||
static bfd_byte *
|
||
elf32_h8_get_relocated_section_contents (output_bfd, link_info, link_order,
|
||
data, relocateable, symbols)
|
||
bfd *output_bfd;
|
||
struct bfd_link_info *link_info;
|
||
struct bfd_link_order *link_order;
|
||
bfd_byte *data;
|
||
boolean relocateable;
|
||
asymbol **symbols;
|
||
{
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
asection *input_section = link_order->u.indirect.section;
|
||
bfd *input_bfd = input_section->owner;
|
||
asection **sections = NULL;
|
||
Elf_Internal_Rela *internal_relocs = NULL;
|
||
Elf32_External_Sym *external_syms = NULL;
|
||
Elf_Internal_Sym *internal_syms = NULL;
|
||
|
||
/* We only need to handle the case of relaxing, or of having a
|
||
particular set of section contents, specially. */
|
||
if (relocateable
|
||
|| elf_section_data (input_section)->this_hdr.contents == NULL)
|
||
return bfd_generic_get_relocated_section_contents (output_bfd, link_info,
|
||
link_order, data,
|
||
relocateable,
|
||
symbols);
|
||
|
||
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
||
|
||
memcpy (data, elf_section_data (input_section)->this_hdr.contents,
|
||
input_section->_raw_size);
|
||
|
||
if ((input_section->flags & SEC_RELOC) != 0
|
||
&& input_section->reloc_count > 0)
|
||
{
|
||
Elf_Internal_Sym *isymp;
|
||
asection **secpp;
|
||
Elf32_External_Sym *esym, *esymend;
|
||
|
||
if (symtab_hdr->contents != NULL)
|
||
external_syms = (Elf32_External_Sym *) symtab_hdr->contents;
|
||
else
|
||
{
|
||
external_syms = ((Elf32_External_Sym *)
|
||
bfd_malloc (symtab_hdr->sh_info
|
||
* sizeof (Elf32_External_Sym)));
|
||
if (external_syms == NULL && symtab_hdr->sh_info > 0)
|
||
goto error_return;
|
||
if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0
|
||
|| (bfd_read (external_syms, sizeof (Elf32_External_Sym),
|
||
symtab_hdr->sh_info, input_bfd)
|
||
!= (symtab_hdr->sh_info * sizeof (Elf32_External_Sym))))
|
||
goto error_return;
|
||
}
|
||
|
||
internal_relocs = (_bfd_elf32_link_read_relocs
|
||
(input_bfd, input_section, (PTR) NULL,
|
||
(Elf_Internal_Rela *) NULL, false));
|
||
if (internal_relocs == NULL)
|
||
goto error_return;
|
||
|
||
internal_syms = ((Elf_Internal_Sym *)
|
||
bfd_malloc (symtab_hdr->sh_info
|
||
* sizeof (Elf_Internal_Sym)));
|
||
if (internal_syms == NULL && symtab_hdr->sh_info > 0)
|
||
goto error_return;
|
||
|
||
sections = (asection **) bfd_malloc (symtab_hdr->sh_info
|
||
* sizeof (asection *));
|
||
if (sections == NULL && symtab_hdr->sh_info > 0)
|
||
goto error_return;
|
||
|
||
isymp = internal_syms;
|
||
secpp = sections;
|
||
esym = external_syms;
|
||
esymend = esym + symtab_hdr->sh_info;
|
||
for (; esym < esymend; ++esym, ++isymp, ++secpp)
|
||
{
|
||
asection *isec;
|
||
|
||
bfd_elf32_swap_symbol_in (input_bfd, esym, isymp);
|
||
|
||
if (isymp->st_shndx == SHN_UNDEF)
|
||
isec = bfd_und_section_ptr;
|
||
else if (isymp->st_shndx > 0 && isymp->st_shndx < SHN_LORESERVE)
|
||
isec = bfd_section_from_elf_index (input_bfd, isymp->st_shndx);
|
||
else if (isymp->st_shndx == SHN_ABS)
|
||
isec = bfd_abs_section_ptr;
|
||
else if (isymp->st_shndx == SHN_COMMON)
|
||
isec = bfd_com_section_ptr;
|
||
else
|
||
{
|
||
/* Who knows? */
|
||
isec = NULL;
|
||
}
|
||
|
||
*secpp = isec;
|
||
}
|
||
|
||
if (! elf32_h8_relocate_section (output_bfd, link_info, input_bfd,
|
||
input_section, data, internal_relocs,
|
||
internal_syms, sections))
|
||
goto error_return;
|
||
|
||
if (sections != NULL)
|
||
free (sections);
|
||
sections = NULL;
|
||
if (internal_syms != NULL)
|
||
free (internal_syms);
|
||
internal_syms = NULL;
|
||
if (external_syms != NULL && symtab_hdr->contents == NULL)
|
||
free (external_syms);
|
||
external_syms = NULL;
|
||
if (internal_relocs != elf_section_data (input_section)->relocs)
|
||
free (internal_relocs);
|
||
internal_relocs = NULL;
|
||
}
|
||
|
||
return data;
|
||
|
||
error_return:
|
||
if (internal_relocs != NULL
|
||
&& internal_relocs != elf_section_data (input_section)->relocs)
|
||
free (internal_relocs);
|
||
if (external_syms != NULL && symtab_hdr->contents == NULL)
|
||
free (external_syms);
|
||
if (internal_syms != NULL)
|
||
free (internal_syms);
|
||
if (sections != NULL)
|
||
free (sections);
|
||
return NULL;
|
||
}
|
||
|
||
|
||
#define TARGET_BIG_SYM bfd_elf32_h8300_vec
|
||
#define TARGET_BIG_NAME "elf32-h8300"
|
||
#define ELF_ARCH bfd_arch_h8300
|
||
#define ELF_MACHINE_CODE EM_H8_300
|
||
#define ELF_MAXPAGESIZE 0x1
|
||
#define bfd_elf32_bfd_reloc_type_lookup elf32_h8_reloc_type_lookup
|
||
#define elf_info_to_howto elf32_h8_info_to_howto
|
||
#define elf_info_to_howto_rel elf32_h8_info_to_howto_rel
|
||
|
||
/* So we can set/examine bits in e_flags to get the specific
|
||
H8 architecture in use. */
|
||
#define elf_backend_final_write_processing \
|
||
elf32_h8_final_write_processing
|
||
#define elf_backend_object_p \
|
||
elf32_h8_object_p
|
||
#define bfd_elf32_bfd_merge_private_bfd_data \
|
||
elf32_h8_merge_private_bfd_data
|
||
|
||
/* ??? when elf_backend_relocate_section is not defined, elf32-target.h
|
||
defaults to using _bfd_generic_link_hash_table_create, but
|
||
elflink.h:bfd_elf32_size_dynamic_sections uses
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
and thus requires an elf hash table. */
|
||
#define bfd_elf32_bfd_link_hash_table_create _bfd_elf_link_hash_table_create
|
||
|
||
/* Use an H8 specific linker, not the ELF generic linker. */
|
||
#define elf_backend_relocate_section elf32_h8_relocate_section
|
||
|
||
/* And relaxing stuff. */
|
||
#define bfd_elf32_bfd_relax_section elf32_h8_relax_section
|
||
#define bfd_elf32_bfd_get_relocated_section_contents \
|
||
elf32_h8_get_relocated_section_contents
|
||
|
||
|
||
#include "elf32-target.h"
|