-/* Generic support for 32-bit ELF
- Copyright 1993, 1995, 1998, 1999 Free Software Foundation, Inc.
+/* BFD back-end for Renesas H8/300 ELF binaries.
+ Copyright (C) 1993-2021 Free Software Foundation, Inc.
-This file is part of BFD, the Binary File Descriptor library.
+ 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 free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+ 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. */
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+ MA 02110-1301, USA. */
-#include "bfd.h"
#include "sysdep.h"
+#include "bfd.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf/h8.h"
+#include "cpu-h8300.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));
+ (bfd *abfd, bfd_reloc_code_real_type code);
+static bfd_boolean elf32_h8_info_to_howto
+ (bfd *, arelent *, Elf_Internal_Rela *);
+static bfd_boolean elf32_h8_info_to_howto_rel
+ (bfd *, arelent *, Elf_Internal_Rela *);
+static unsigned long elf32_h8_mach (flagword);
+static bfd_boolean elf32_h8_object_p (bfd *);
+static bfd_boolean elf32_h8_merge_private_bfd_data
+ (bfd *, struct bfd_link_info *);
+static bfd_boolean elf32_h8_relax_section
+ (bfd *, asection *, struct bfd_link_info *, bfd_boolean *);
+static bfd_boolean elf32_h8_relax_delete_bytes
+ (bfd *, asection *, bfd_vma, int);
+static bfd_boolean elf32_h8_symbol_address_p (bfd *, asection *, bfd_vma);
+static bfd_byte *elf32_h8_get_relocated_section_contents
+ (bfd *, struct bfd_link_info *, struct bfd_link_order *,
+ bfd_byte *, bfd_boolean, asymbol **);
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 **));
+ (unsigned long, bfd *, bfd *, asection *,
+ bfd_byte *, bfd_vma, bfd_vma, bfd_vma,
+ struct bfd_link_info *, asection *, int);
+static bfd_boolean elf32_h8_relocate_section
+ (bfd *, struct bfd_link_info *, bfd *, asection *,
+ bfd_byte *, Elf_Internal_Rela *,
+ Elf_Internal_Sym *, asection **);
+static bfd_reloc_status_type special
+ (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
/* This does not include any relocation information, but should be
good enough for GDB or objdump to read the file. */
#define R_H8_NONE_X 0
HOWTO (R_H8_NONE, /* type */
0, /* rightshift */
- 0, /* size (0 = byte, 1 = short, 2 = long) */
+ 3, /* size (0 = byte, 1 = short, 2 = long) */
0, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- NULL, /* special_function */
+ complain_overflow_dont,/* complain_on_overflow */
+ special, /* special_function */
"R_H8_NONE", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
- false), /* pcrel_offset */
+ 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 */
+ FALSE, /* pc_relative */
0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- NULL, /* special_function */
+ complain_overflow_dont,/* complain_on_overflow */
+ special, /* special_function */
"R_H8_DIR32", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0, /* src_mask */
0xffffffff, /* dst_mask */
- false), /* pcrel_offset */
+ 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 */
+ FALSE, /* pc_relative */
0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- NULL, /* special_function */
+ complain_overflow_dont,/* complain_on_overflow */
+ special, /* special_function */
"R_H8_DIR16", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0, /* src_mask */
0x0000ffff, /* dst_mask */
- false), /* pcrel_offset */
+ 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 */
+ FALSE, /* pc_relative */
0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- NULL, /* special_function */
- "R_H8_DIR16", /* name */
- false, /* partial_inplace */
+ complain_overflow_dont,/* complain_on_overflow */
+ special, /* special_function */
+ "R_H8_DIR8", /* name */
+ FALSE, /* partial_inplace */
0, /* src_mask */
0x000000ff, /* dst_mask */
- false), /* pcrel_offset */
+ 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 */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- NULL, /* special_function */
+ special, /* special_function */
"R_H8_DIR16A8", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0, /* src_mask */
0x0000ffff, /* dst_mask */
- false), /* pcrel_offset */
+ 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 */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- NULL, /* special_function */
+ special, /* special_function */
"R_H8_DIR16R8", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0, /* src_mask */
0x0000ffff, /* dst_mask */
- false), /* pcrel_offset */
+ 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 */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- NULL, /* special_function */
+ special, /* special_function */
"R_H8_DIR24A8", /* name */
- true, /* partial_inplace */
+ TRUE, /* partial_inplace */
0xff000000, /* src_mask */
0x00ffffff, /* dst_mask */
- false), /* pcrel_offset */
+ 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 */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- NULL, /* special_function */
+ special, /* special_function */
"R_H8_DIR24R8", /* name */
- true, /* partial_inplace */
+ TRUE, /* partial_inplace */
0xff000000, /* src_mask */
0x00ffffff, /* dst_mask */
- false), /* pcrel_offset */
+ 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 */
+ FALSE, /* pc_relative */
0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- NULL, /* special_function */
- "R_H8_DIR32", /* name */
- false, /* partial_inplace */
+ complain_overflow_dont,/* complain_on_overflow */
+ special, /* special_function */
+ "R_H8_DIR32A16", /* name */
+ FALSE, /* partial_inplace */
0, /* src_mask */
0xffffffff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
+#define R_H8_DISP32A16_X (R_H8_DIR32A16_X + 1)
+ HOWTO (R_H8_DISP32A16, /* 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_DISP32A16", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
+#define R_H8_PCREL16_X (R_H8_DISP32A16_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
-{
+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. */
+/* An array mapping BFD reloc codes to H8 ELF relocs. */
-static const struct elf_reloc_map h8_reloc_map[] =
-{
+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_H8_DIR24A8, R_H8_DIR24A8_X },
{ BFD_RELOC_H8_DIR24R8, R_H8_DIR24R8_X },
{ BFD_RELOC_H8_DIR32A16, R_H8_DIR32A16_X },
+ { BFD_RELOC_H8_DISP32A16, R_H8_DISP32A16_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;
+elf32_h8_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
+ bfd_reloc_code_real_type code)
{
unsigned int i;
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;
+static reloc_howto_type *
+elf32_h8_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
+ const char *r_name)
+{
+ unsigned int i;
+
+ for (i = 0;
+ i < sizeof (h8_elf_howto_table) / sizeof (h8_elf_howto_table[0]);
+ i++)
+ if (h8_elf_howto_table[i].name != NULL
+ && strcasecmp (h8_elf_howto_table[i].name, r_name) == 0)
+ return &h8_elf_howto_table[i];
+
+ return NULL;
+}
+
+static bfd_boolean
+elf32_h8_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *bfd_reloc,
+ Elf_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)
+ if (h8_elf_howto_table[i].type == r)
{
bfd_reloc->howto = &h8_elf_howto_table[i];
- return;
+ return TRUE;
}
- abort ();
+ /* xgettext:c-format */
+ _bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd, r);
+ bfd_set_error (bfd_error_bad_value);
+ return FALSE;
}
-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;
+static bfd_boolean
+elf32_h8_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
+ arelent *bfd_reloc ATTRIBUTE_UNUSED,
+ Elf_Internal_Rela *elf_reloc ATTRIBUTE_UNUSED)
{
- unsigned int r;
-
- abort ();
- r = ELF32_R_TYPE (elf_reloc->r_info);
- bfd_reloc->howto = &h8_elf_howto_table[r];
+ return FALSE;
}
+/* 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 (bfd *abfd ATTRIBUTE_UNUSED,
+ arelent *reloc_entry ATTRIBUTE_UNUSED,
+ asymbol *symbol ATTRIBUTE_UNUSED,
+ void * 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;
+elf32_h8_final_link_relocate (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_DISP32A16:
+ case R_H8_DIR24A8:
value += addend;
bfd_put_32 (input_bfd, value, hit_data);
return bfd_reloc_ok;
case R_H8_DIR8:
value += addend;
- if ((long) value > 0x7f || (long) value < -0x80)
- return bfd_reloc_overflow;
-
bfd_put_8 (input_bfd, value, hit_data);
return bfd_reloc_ok;
- case R_H8_DIR24A8:
case R_H8_DIR24R8:
value += addend;
- if ((long) value > 0x7fffff || (long) value < -0x800000)
- return bfd_reloc_overflow;
+ /* HIT_DATA is the address for the first byte for the relocated
+ value. Subtract 1 so that we can manipulate the data in 32-bit
+ 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 32-bit 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;
}
}
\f
/* 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;
+static bfd_boolean
+elf32_h8_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
+ bfd *input_bfd, asection *input_section,
+ bfd_byte *contents, Elf_Internal_Rela *relocs,
+ Elf_Internal_Sym *local_syms,
+ asection **local_sections)
{
Elf_Internal_Shdr *symtab_hdr;
struct elf_link_hash_entry **sym_hashes;
relend = relocs + input_section->reloc_count;
for (; rel < relend; rel++)
{
- int r_type;
+ unsigned 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;
+ arelent bfd_reloc;
+ reloc_howto_type *howto;
+
+ if (! elf32_h8_info_to_howto (input_bfd, &bfd_reloc, rel))
+ continue;
+ howto = bfd_reloc.howto;
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;
{
sym = local_syms + r_symndx;
sec = local_sections[r_symndx];
- relocation = (sec->output_section->vma
- + sec->output_offset
- + sym->st_value);
+ relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
}
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;
- }
+ bfd_boolean unresolved_reloc, warned, ignored;
+
+ RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
+ r_symndx, symtab_hdr, sym_hashes,
+ h, sec, relocation,
+ unresolved_reloc, warned, ignored);
}
+ if (sec != NULL && discarded_section (sec))
+ RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
+ rel, 1, relend, howto, 0, contents);
+
+ if (bfd_link_relocatable (info))
+ continue;
+
r = elf32_h8_final_link_relocate (r_type, input_bfd, output_bfd,
input_section,
contents, rel->r_offset,
{
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);
+ name = bfd_section_name (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;
+ (*info->callbacks->reloc_overflow)
+ (info, (h ? &h->root : NULL), name, howto->name,
+ (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
break;
case bfd_reloc_undefined:
- if (! ((*info->callbacks->undefined_symbol)
- (info, name, input_bfd, input_section,
- rel->r_offset, true)))
- return false;
+ (*info->callbacks->undefined_symbol)
+ (info, name, input_bfd, input_section, rel->r_offset, TRUE);
break;
case bfd_reloc_outofrange:
/* fall through */
common_error:
- if (!((*info->callbacks->warning)
- (info, msg, name, input_bfd, input_section,
- rel->r_offset)))
- return false;
+ (*info->callbacks->warning) (info, msg, name, input_bfd,
+ input_section, rel->r_offset);
break;
}
}
}
- return true;
+ return TRUE;
}
/* Object files encode the specific H8 model they were compiled
Examine that field and return the proper BFD machine type for
the object file. */
-static int
-elf32_h8_mach (flags)
- flagword flags;
+static unsigned long
+elf32_h8_mach (flagword flags)
{
switch (flags & EF_H8_MACH)
{
case E_H8_MACH_H8300S:
return bfd_mach_h8300s;
+
+ case E_H8_MACH_H8300HN:
+ return bfd_mach_h8300hn;
+
+ case E_H8_MACH_H8300SN:
+ return bfd_mach_h8300sn;
+
+ case E_H8_MACH_H8300SX:
+ return bfd_mach_h8300sx;
+
+ case E_H8_MACH_H8300SXN:
+ return bfd_mach_h8300sxn;
}
}
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;
+static bfd_boolean
+elf32_h8_final_write_processing (bfd *abfd)
{
unsigned long val;
case bfd_mach_h8300s:
val = E_H8_MACH_H8300S;
break;
+
+ case bfd_mach_h8300hn:
+ val = E_H8_MACH_H8300HN;
+ break;
+
+ case bfd_mach_h8300sn:
+ val = E_H8_MACH_H8300SN;
+ break;
+
+ case bfd_mach_h8300sx:
+ val = E_H8_MACH_H8300SX;
+ break;
+
+ case bfd_mach_h8300sxn:
+ val = E_H8_MACH_H8300SXN;
+ break;
}
elf_elfheader (abfd)->e_flags &= ~ (EF_H8_MACH);
elf_elfheader (abfd)->e_flags |= val;
+ return _bfd_elf_final_write_processing (abfd);
}
/* 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;
+static bfd_boolean
+elf32_h8_object_p (bfd *abfd)
{
bfd_default_set_arch_mach (abfd, bfd_arch_h8300,
elf32_h8_mach (elf_elfheader (abfd)->e_flags));
- return true;
+ 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;
+static bfd_boolean
+elf32_h8_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
{
+ bfd *obfd = info->output_bfd;
+
if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
- return true;
+ 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;
+ bfd_get_mach (ibfd)))
+ return FALSE;
}
- return true;
+ return TRUE;
}
+/* This function handles relaxing for the H8..
+
+ There are a few relaxing opportunities 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
+
+ bset:16 -> bset:8 2 bytes
+ bset:24/32 -> bset:8 4 bytes
+ (also applicable to other bit manipulation instructions)
+
+ mov.b:16 -> mov.b:8 2 bytes
+ mov.b:24/32 -> mov.b:8 4 bytes
+
+ bset:24/32 -> bset:16 2 bytes
+ (also applicable to other bit manipulation instructions)
+
+ mov.[bwl]:24/32 -> mov.[bwl]:16 2 bytes
-#define TARGET_BIG_SYM bfd_elf32_h8300_vec
+ mov.[bwl] @(displ:24/32+ERx) -> mov.[bwl] @(displ:16+ERx) 4 bytes. */
+
+static bfd_boolean
+elf32_h8_relax_section (bfd *abfd, asection *sec,
+ struct bfd_link_info *link_info, bfd_boolean *again)
+{
+ Elf_Internal_Shdr *symtab_hdr;
+ Elf_Internal_Rela *internal_relocs;
+ Elf_Internal_Rela *irel, *irelend;
+ bfd_byte *contents = NULL;
+ Elf_Internal_Sym *isymbuf = 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 relocatable link, if
+ this section does not have relocs, or if this is not a
+ code section. */
+ if (bfd_link_relocatable (link_info)
+ || (sec->flags & SEC_RELOC) == 0
+ || sec->reloc_count == 0
+ || (sec->flags & SEC_CODE) == 0)
+ return TRUE;
+
+ symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+
+ /* Get a copy of the native relocations. */
+ internal_relocs = (_bfd_elf_link_read_relocs
+ (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
+ link_info->keep_memory));
+ if (internal_relocs == NULL)
+ goto error_return;
+
+ 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;
+
+ {
+ arelent bfd_reloc;
+
+ if (! elf32_h8_info_to_howto (abfd, &bfd_reloc, irel))
+ continue;
+ }
+ /* 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;
+
+ switch(ELF32_R_TYPE (irel->r_info))
+ {
+ case R_H8_DIR24R8:
+ case R_H8_PCREL16:
+ case R_H8_DIR16A8:
+ case R_H8_DIR24A8:
+ case R_H8_DIR32A16:
+ case R_H8_DISP32A16:
+ break;
+ default:
+ continue;
+ }
+
+ /* 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. */
+ if (!bfd_malloc_and_get_section (abfd, sec, &contents))
+ goto error_return;
+ }
+ }
+
+ /* Read this BFD's local symbols if we haven't done so already. */
+ if (isymbuf == NULL && symtab_hdr->sh_info != 0)
+ {
+ isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
+ if (isymbuf == NULL)
+ isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
+ symtab_hdr->sh_info, 0,
+ NULL, NULL, NULL);
+ if (isymbuf == NULL)
+ 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)
+ {
+ /* A local symbol. */
+ Elf_Internal_Sym *isym;
+ asection *sym_sec;
+
+ isym = isymbuf + ELF32_R_SYM (irel->r_info);
+ sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
+ symval = isym->st_value;
+ /* If the reloc is absolute, it will not have
+ a symbol or section associated with it. */
+ if (sym_sec)
+ symval += 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;
+ elf_section_data (sec)->this_hdr.contents = contents;
+ symtab_hdr->contents = (unsigned char *) isymbuf;
+
+ /* Get the instruction code being relaxed. */
+ code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
+
+ /* 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.
+
+ Only perform this optimisation for jumps (code 0x5a) not
+ subroutine calls, as otherwise it could transform:
+
+ mov.w r0,r0
+ beq .L1
+ jsr @_bar
+ .L1: rts
+ _bar: rts
+ into:
+ mov.w r0,r0
+ bne _bar
+ rts
+ _bar: rts
+
+ which changes the call (jsr) into a branch (bne). */
+ if (code == 0x5a /* jmp24. */
+ && (int) gap <= 130
+ && (int) 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_sym;
+
+ /* We will need to examine the symbol used by the
+ previous relocation. */
+
+ last_sym = isymbuf + ELF32_R_SYM (last_reloc->r_info);
+ last_sym_sec
+ = bfd_section_from_elf_index (abfd, last_sym->st_shndx);
+ last_value = (last_sym->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, 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;
+ }
+ }
+
+ if (code == 0x5e)
+ /* This is jsr24 */
+ bfd_put_8 (abfd, 0x55, contents + irel->r_offset - 1); /* bsr8. */
+ else if (code == 0x5a)
+ /* This is jmp24 */
+ bfd_put_8 (abfd, 0x40, contents + irel->r_offset - 1); /* bra8. */
+ 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 16-bit pc-relative branch into a 8-bit 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;
+ elf_section_data (sec)->this_hdr.contents = contents;
+ symtab_hdr->contents = (unsigned char *) isymbuf;
+
+ /* Get the opcode. */
+ code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
+
+ if (code == 0x58)
+ {
+ /* bCC:16 -> bCC:8 */
+ /* Get the second byte of the original insn, which
+ contains the condition code. */
+ code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
+
+ /* Compute the first byte of the relaxed
+ instruction. The original sequence 0x58 0xX0
+ is relaxed to 0x4X, where X represents the
+ condition code. */
+ code &= 0xf0;
+ code >>= 4;
+ code |= 0x40;
+ bfd_put_8 (abfd, code, contents + irel->r_offset - 2); /* bCC:8. */
+ }
+ else if (code == 0x5c) /* bsr16. */
+ /* This is bsr. */
+ bfd_put_8 (abfd, 0x55, contents + irel->r_offset - 2); /* bsr8. */
+ else
+ /* Might be MOVSD. */
+ break;
+
+ /* 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 one of the following
+ instructions:
+
+ "band", "bclr", "biand", "bild", "bior", "bist", "bixor",
+ "bld", "bnot", "bor", "bset", "bst", "btst", "bxor", and
+ "mov.b"
+
+ We may relax this into an 8-bit absolute address if it's in
+ the right range. */
+ case R_H8_DIR16A8:
+ {
+ bfd_vma value;
+
+ value = bfd_h8300_pad_address (abfd, symval + irel->r_addend);
+ if (value >= 0xffffff00u)
+ {
+ unsigned char code;
+ unsigned char temp_code;
+
+ /* Note that we've changed the relocs, section contents,
+ etc. */
+ elf_section_data (sec)->relocs = internal_relocs;
+ elf_section_data (sec)->this_hdr.contents = contents;
+ symtab_hdr->contents = (unsigned char *) isymbuf;
+
+ /* Get the opcode. */
+ code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
+
+ /* All instructions with R_H8_DIR16A8 start with
+ 0x6a. */
+ if (code != 0x6a)
+ abort ();
+
+ temp_code = code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
+ /* If this is a mov.b instruction, clear the lower
+ nibble, which contains the source/destination
+ register number. */
+ if ((temp_code & 0x10) != 0x10)
+ temp_code &= 0xf0;
+
+ switch (temp_code)
+ {
+ case 0x00:
+ /* This is mov.b @aa:16,Rd. */
+ bfd_put_8 (abfd, (code & 0xf) | 0x20,
+ contents + irel->r_offset - 2);
+ break;
+ case 0x80:
+ /* This is mov.b Rs,@aa:16. */
+ bfd_put_8 (abfd, (code & 0xf) | 0x30,
+ contents + irel->r_offset - 2);
+ break;
+ case 0x18:
+ /* This is a bit-maniputation instruction that
+ stores one bit into memory, one of "bclr",
+ "bist", "bnot", "bset", and "bst". */
+ bfd_put_8 (abfd, 0x7f, contents + irel->r_offset - 2);
+ break;
+ case 0x10:
+ /* This is a bit-maniputation instruction that
+ loads one bit from memory, one of "band",
+ "biand", "bild", "bior", "bixor", "bld", "bor",
+ "btst", and "bxor". */
+ bfd_put_8 (abfd, 0x7e, contents + irel->r_offset - 2);
+ break;
+ default:
+ abort ();
+ }
+
+ /* Fix the relocation's type. */
+ irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
+ R_H8_DIR8);
+
+ /* Move the relocation. */
+ 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 24-bit absolute address in one of the following
+ instructions:
+
+ "band", "bclr", "biand", "bild", "bior", "bist", "bixor",
+ "bld", "bnot", "bor", "bset", "bst", "btst", "bxor", and
+ "mov.b"
+
+ We may relax this into an 8-bit absolute address if it's in
+ the right range. */
+ case R_H8_DIR24A8:
+ {
+ bfd_vma value;
+
+ value = bfd_h8300_pad_address (abfd, symval + irel->r_addend);
+ if (value >= 0xffffff00u)
+ {
+ unsigned char code;
+ unsigned char temp_code;
+
+ /* Note that we've changed the relocs, section contents,
+ etc. */
+ elf_section_data (sec)->relocs = internal_relocs;
+ elf_section_data (sec)->this_hdr.contents = contents;
+ symtab_hdr->contents = (unsigned char *) isymbuf;
+
+ /* Get the opcode. */
+ code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
+
+ /* All instructions with R_H8_DIR24A8 start with
+ 0x6a. */
+ if (code != 0x6a)
+ abort ();
+
+ temp_code = code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
+
+ /* If this is a mov.b instruction, clear the lower
+ nibble, which contains the source/destination
+ register number. */
+ if ((temp_code & 0x30) != 0x30)
+ temp_code &= 0xf0;
+
+ switch (temp_code)
+ {
+ case 0x20:
+ /* This is mov.b @aa:24/32,Rd. */
+ bfd_put_8 (abfd, (code & 0xf) | 0x20,
+ contents + irel->r_offset - 2);
+ break;
+ case 0xa0:
+ /* This is mov.b Rs,@aa:24/32. */
+ bfd_put_8 (abfd, (code & 0xf) | 0x30,
+ contents + irel->r_offset - 2);
+ break;
+ case 0x38:
+ /* This is a bit-maniputation instruction that
+ stores one bit into memory, one of "bclr",
+ "bist", "bnot", "bset", and "bst". */
+ bfd_put_8 (abfd, 0x7f, contents + irel->r_offset - 2);
+ break;
+ case 0x30:
+ /* This is a bit-maniputation instruction that
+ loads one bit from memory, one of "band",
+ "biand", "bild", "bior", "bixor", "bld", "bor",
+ "btst", and "bxor". */
+ bfd_put_8 (abfd, 0x7e, contents + irel->r_offset - 2);
+ break;
+ default:
+ abort();
+ }
+
+ /* Fix the relocation's type. */
+ irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
+ R_H8_DIR8);
+ irel->r_offset--;
+
+ /* Delete four bytes of data. */
+ if (!elf32_h8_relax_delete_bytes (abfd, sec,
+ irel->r_offset + 1, 4))
+ 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;
+ }
+ }
+
+ /* Fall through. */
+
+ /* This is a 24-/32-bit absolute address in one of the
+ following instructions:
+
+ "band", "bclr", "biand", "bild", "bior", "bist",
+ "bixor", "bld", "bnot", "bor", "bset", "bst", "btst",
+ "bxor", "ldc.w", "stc.w" and "mov.[bwl]"
+
+ We may relax this into an 16-bit absolute address if it's
+ in the right range. */
+ case R_H8_DIR32A16:
+ {
+ bfd_vma value;
+
+ value = bfd_h8300_pad_address (abfd, symval + irel->r_addend);
+ if (value <= 0x7fff || value >= 0xffff8000u)
+ {
+ unsigned char code;
+ unsigned char op0, op1, op2, op3;
+ unsigned char *op_ptr;
+
+ /* Note that we've changed the relocs, section contents,
+ etc. */
+ elf_section_data (sec)->relocs = internal_relocs;
+ elf_section_data (sec)->this_hdr.contents = contents;
+ symtab_hdr->contents = (unsigned char *) isymbuf;
+
+ if (irel->r_offset >= 4)
+ {
+ /* Check for 4-byte MOVA relaxation (SH-specific). */
+ int second_reloc = 0;
+
+ op_ptr = contents + irel->r_offset - 4;
+
+ if (last_reloc)
+ {
+ arelent bfd_reloc;
+ reloc_howto_type *h;
+ bfd_vma last_reloc_size;
+
+ if (! elf32_h8_info_to_howto (abfd, &bfd_reloc, last_reloc))
+ break;
+ h = bfd_reloc.howto;
+ last_reloc_size = 1 << h->size;
+ if (last_reloc->r_offset + last_reloc_size
+ == irel->r_offset)
+ {
+ op_ptr -= last_reloc_size;
+ second_reloc = 1;
+ }
+ }
+
+ if (irel + 1 < irelend)
+ {
+ Elf_Internal_Rela *next_reloc = irel + 1;
+ arelent bfd_reloc;
+ reloc_howto_type *h;
+ bfd_vma next_reloc_size;
+
+ if (! elf32_h8_info_to_howto (abfd, &bfd_reloc, next_reloc))
+ break;
+ h = bfd_reloc.howto;
+ next_reloc_size = 1 << h->size;
+ if (next_reloc->r_offset + next_reloc_size
+ == irel->r_offset)
+ {
+ op_ptr -= next_reloc_size;
+ second_reloc = 1;
+ }
+ }
+
+ op0 = bfd_get_8 (abfd, op_ptr + 0);
+ op1 = bfd_get_8 (abfd, op_ptr + 1);
+ op2 = bfd_get_8 (abfd, op_ptr + 2);
+ op3 = bfd_get_8 (abfd, op_ptr + 3);
+
+ if (op0 == 0x01
+ && (op1 & 0xdf) == 0x5f
+ && (op2 & 0x40) == 0x40
+ && (op3 & 0x80) == 0x80)
+ {
+ if ((op2 & 0x08) == 0)
+ second_reloc = 1;
+
+ if (second_reloc)
+ {
+ op3 &= ~0x08;
+ bfd_put_8 (abfd, op3, op_ptr + 3);
+ }
+ else
+ {
+ op2 &= ~0x08;
+ bfd_put_8 (abfd, op2, op_ptr + 2);
+ }
+ goto r_h8_dir32a16_common;
+ }
+ }
+
+ /* Now check for short version of MOVA. (SH-specific) */
+ op_ptr = contents + irel->r_offset - 2;
+ op0 = bfd_get_8 (abfd, op_ptr + 0);
+ op1 = bfd_get_8 (abfd, op_ptr + 1);
+
+ if (op0 == 0x7a
+ && (op1 & 0x88) == 0x80)
+ {
+ op1 |= 0x08;
+ bfd_put_8 (abfd, op1, op_ptr + 1);
+ goto r_h8_dir32a16_common;
+ }
+
+ /* Get the opcode. */
+ code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
+
+ /* Fix the opcode. For all the instructions that
+ belong to this relaxation, we simply need to turn
+ off bit 0x20 in the previous byte. */
+ code &= ~0x20;
+
+ bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
+
+ r_h8_dir32a16_common:
+ /* Fix the relocation's type. */
+ irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
+ R_H8_DIR16);
+
+ /* 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; /* case R_H8_DIR32A16 */
+ }
+
+ case R_H8_DISP32A16:
+ /* mov.[bwl] @(displ:24/32+ERx) -> mov.[bwl] @(displ:16+ERx) 4 bytes
+ It is assured that instruction uses at least 4 bytes opcode before
+ reloc entry addressing mode "register indirect with displacement"
+ relaxing options (all saving 4 bytes):
+ 0x78 0sss0000 0x6A 0010dddd disp:32 mov.b @(d:32,ERs),Rd ->
+ 0x6E 0sssdddd disp:16 mov.b @(d:16,ERs),Rd
+ 0x78 0sss0000 0x6B 0010dddd disp:32 mov.w @(d:32,ERs),Rd ->
+ 0x6F 0sssdddd disp:16 mov.w @(d:16,ERs),Rd
+ 0x01 0x00 0x78 0sss0000 0x6B 00100ddd disp:32 mov.l @(d:32,ERs),ERd ->
+ 0x01 0x00 0x6F 0sss0ddd disp:16 mov.l @(d:16,ERs),ERd
+
+ 0x78 0ddd0000 0x6A 1010ssss disp:32 mov.b Rs,@(d:32,ERd) ->
+ 0x6E 1dddssss disp:16 mov.b Rs,@(d:16,ERd)
+ 0x78 0ddd0000 0x6B 1010ssss disp:32 mov.w Rs,@(d:32,ERd) ->
+ 0x6F 1dddssss disp:16 mov.w Rs,@(d:16,ERd)
+ 0x01 0x00 0x78 xddd0000 0x6B 10100sss disp:32 mov.l ERs,@(d:32,ERd) ->
+ 0x01 0x00 0x6F 1ddd0sss disp:16 mov.l ERs,@(d:16,ERd)
+ mov.l prefix 0x01 0x00 can be left as is and mov.l handled same
+ as mov.w/ */
+ {
+ bfd_vma value;
+
+ value = bfd_h8300_pad_address (abfd, symval + irel->r_addend);
+ if (value <= 0x7fff || value >= 0xffff8000u)
+ {
+ unsigned char op0, op1, op2, op3, op0n, op1n;
+ int relax = 0;
+
+ /* Note that we've changed the relocs, section contents,
+ etc. */
+ elf_section_data (sec)->relocs = internal_relocs;
+ elf_section_data (sec)->this_hdr.contents = contents;
+ symtab_hdr->contents = (unsigned char *) isymbuf;
+
+ if (irel->r_offset >= 4)
+ {
+ op0 = bfd_get_8 (abfd, contents + irel->r_offset - 4);
+ op1 = bfd_get_8 (abfd, contents + irel->r_offset - 3);
+ op2 = bfd_get_8 (abfd, contents + irel->r_offset - 2);
+ op3 = bfd_get_8 (abfd, contents + irel->r_offset - 1);
+
+ if (op0 == 0x78)
+ {
+ switch(op2)
+ {
+ case 0x6A:
+ if ((op1 & 0x8F) == 0x00 && (op3 & 0x70) == 0x20)
+ {
+ /* mov.b. */
+ op0n = 0x6E;
+ relax = 1;
+ }
+ break;
+ case 0x6B:
+ if ((op1 & 0x0F) == 0x00 && (op3 & 0x70) == 0x20)
+ {
+ /* mov.w/l. */
+ op0n = 0x6F;
+ relax = 1;
+ }
+ break;
+ default:
+ break;
+ }
+ }
+ }
+
+ if (relax)
+ {
+ op1n = (op3 & 0x8F) | (op1 & 0x70);
+ bfd_put_8 (abfd, op0n, contents + irel->r_offset - 4);
+ bfd_put_8 (abfd, op1n, contents + irel->r_offset - 3);
+
+ /* Fix the relocation's type. */
+ irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_H8_DIR16);
+ irel->r_offset -= 2;
+
+ /* Delete four bytes of data. */
+ if (!elf32_h8_relax_delete_bytes (abfd, sec, irel->r_offset + 2, 4))
+ 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 (isymbuf != NULL
+ && symtab_hdr->contents != (unsigned char *) isymbuf)
+ {
+ if (! link_info->keep_memory)
+ free (isymbuf);
+ else
+ symtab_hdr->contents = (unsigned char *) isymbuf;
+ }
+
+ if (contents != NULL
+ && elf_section_data (sec)->this_hdr.contents != contents)
+ {
+ if (! link_info->keep_memory)
+ free (contents);
+ else
+ {
+ /* Cache the section contents for elf_link_input_bfd. */
+ elf_section_data (sec)->this_hdr.contents = contents;
+ }
+ }
+
+ if (elf_section_data (sec)->relocs != internal_relocs)
+ free (internal_relocs);
+
+ return TRUE;
+
+ error_return:
+ if (symtab_hdr->contents != (unsigned char *) isymbuf)
+ free (isymbuf);
+ if (elf_section_data (sec)->this_hdr.contents != contents)
+ free (contents);
+ if (elf_section_data (sec)->relocs != internal_relocs)
+ free (internal_relocs);
+ return FALSE;
+}
+
+/* Delete some bytes from a section while relaxing. */
+
+static bfd_boolean
+elf32_h8_relax_delete_bytes (bfd *abfd, asection *sec, bfd_vma addr, int count)
+{
+ Elf_Internal_Shdr *symtab_hdr;
+ unsigned int sec_shndx;
+ bfd_byte *contents;
+ Elf_Internal_Rela *irel, *irelend;
+ Elf_Internal_Sym *isym;
+ Elf_Internal_Sym *isymend;
+ bfd_vma toaddr;
+ struct elf_link_hash_entry **sym_hashes;
+ struct elf_link_hash_entry **end_hashes;
+ unsigned int symcount;
+
+ sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
+
+ contents = elf_section_data (sec)->this_hdr.contents;
+
+ toaddr = sec->size;
+
+ irel = elf_section_data (sec)->relocs;
+ irelend = irel + sec->reloc_count;
+
+ /* Actually delete the bytes. */
+ memmove (contents + addr, contents + addr + count,
+ (size_t) (toaddr - addr - count));
+ sec->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. */
+ symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+ isym = (Elf_Internal_Sym *) symtab_hdr->contents;
+ isymend = isym + symtab_hdr->sh_info;
+ for (; isym < isymend; isym++)
+ {
+ if (isym->st_shndx == sec_shndx
+ && isym->st_value > addr
+ && isym->st_value <= toaddr)
+ isym->st_value -= count;
+ }
+
+ /* Now adjust the global symbols defined in this section. */
+ symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
+ - symtab_hdr->sh_info);
+ sym_hashes = elf_sym_hashes (abfd);
+ end_hashes = sym_hashes + symcount;
+ for (; sym_hashes < end_hashes; sym_hashes++)
+ {
+ struct elf_link_hash_entry *sym_hash = *sym_hashes;
+
+ 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
+ && 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 bfd_boolean
+elf32_h8_symbol_address_p (bfd *abfd, asection *sec, bfd_vma addr)
+{
+ Elf_Internal_Shdr *symtab_hdr;
+ unsigned int sec_shndx;
+ Elf_Internal_Sym *isym;
+ Elf_Internal_Sym *isymend;
+ struct elf_link_hash_entry **sym_hashes;
+ struct elf_link_hash_entry **end_hashes;
+ unsigned int symcount;
+
+ sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
+
+ /* Examine all the symbols. */
+ symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+ isym = (Elf_Internal_Sym *) symtab_hdr->contents;
+ isymend = isym + symtab_hdr->sh_info;
+ for (; isym < isymend; isym++)
+ {
+ if (isym->st_shndx == sec_shndx
+ && isym->st_value == addr)
+ return TRUE;
+ }
+
+ symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
+ - symtab_hdr->sh_info);
+ sym_hashes = elf_sym_hashes (abfd);
+ end_hashes = sym_hashes + symcount;
+ for (; sym_hashes < end_hashes; sym_hashes++)
+ {
+ struct elf_link_hash_entry *sym_hash = *sym_hashes;
+ 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 (bfd *output_bfd,
+ struct bfd_link_info *link_info,
+ struct bfd_link_order *link_order,
+ bfd_byte *data,
+ bfd_boolean relocatable,
+ 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;
+ Elf_Internal_Sym *isymbuf = NULL;
+
+ /* We only need to handle the case of relaxing, or of having a
+ particular set of section contents, specially. */
+ if (relocatable
+ || elf_section_data (input_section)->this_hdr.contents == NULL)
+ return bfd_generic_get_relocated_section_contents (output_bfd, link_info,
+ link_order, data,
+ relocatable,
+ symbols);
+
+ symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
+
+ memcpy (data, elf_section_data (input_section)->this_hdr.contents,
+ (size_t) input_section->size);
+
+ if ((input_section->flags & SEC_RELOC) != 0
+ && input_section->reloc_count > 0)
+ {
+ asection **secpp;
+ Elf_Internal_Sym *isym, *isymend;
+ bfd_size_type amt;
+
+ internal_relocs = (_bfd_elf_link_read_relocs
+ (input_bfd, input_section, NULL,
+ (Elf_Internal_Rela *) NULL, FALSE));
+ if (internal_relocs == NULL)
+ goto error_return;
+
+ if (symtab_hdr->sh_info != 0)
+ {
+ isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
+ if (isymbuf == NULL)
+ isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
+ symtab_hdr->sh_info, 0,
+ NULL, NULL, NULL);
+ if (isymbuf == NULL)
+ goto error_return;
+ }
+
+ amt = symtab_hdr->sh_info;
+ amt *= sizeof (asection *);
+ sections = (asection **) bfd_malloc (amt);
+ if (sections == NULL && amt != 0)
+ goto error_return;
+
+ isymend = isymbuf + symtab_hdr->sh_info;
+ for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp)
+ {
+ asection *isec;
+
+ if (isym->st_shndx == SHN_UNDEF)
+ isec = bfd_und_section_ptr;
+ else if (isym->st_shndx == SHN_ABS)
+ isec = bfd_abs_section_ptr;
+ else if (isym->st_shndx == SHN_COMMON)
+ isec = bfd_com_section_ptr;
+ else
+ isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx);
+
+ *secpp = isec;
+ }
+
+ if (! elf32_h8_relocate_section (output_bfd, link_info, input_bfd,
+ input_section, data, internal_relocs,
+ isymbuf, sections))
+ goto error_return;
+
+ free (sections);
+ if (symtab_hdr->contents != (unsigned char *) isymbuf)
+ free (isymbuf);
+ if (elf_section_data (input_section)->relocs != internal_relocs)
+ free (internal_relocs);
+ }
+
+ return data;
+
+ error_return:
+ free (sections);
+ if (symtab_hdr->contents != (unsigned char *) isymbuf)
+ free (isymbuf);
+ if (elf_section_data (input_section)->relocs != internal_relocs)
+ free (internal_relocs);
+ return NULL;
+}
+
+
+#define TARGET_BIG_SYM h8300_elf32_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 bfd_elf32_bfd_reloc_name_lookup elf32_h8_reloc_name_lookup
#define elf_info_to_howto elf32_h8_info_to_howto
#define elf_info_to_howto_rel elf32_h8_info_to_howto_rel
/* ??? 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
+ bfd_elf_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
+#define elf_backend_rela_normal 1
+#define elf_backend_can_gc_sections 1
+
+/* 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
+
+#define elf_symbol_leading_char '_'
+
+#include "elf32-target.h"
+
+#undef TARGET_BIG_SYM
+#define TARGET_BIG_SYM h8300_elf32_linux_vec
+#undef TARGET_BIG_NAME
+#define TARGET_BIG_NAME "elf32-h8300-linux"
+#undef elf_symbol_leading_char
+#define elf32_bed elf32_h8300_linux_bed
#include "elf32-target.h"
projects / thirdparty / binutils-gdb.git / blobdiff