OpenE2K/binutils-gdb
12
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
23e3a7ac79
binutils-gdb/bfd/elf32-m68hc11.c
Stephane Carrez 1fd03b5ab2 * elf32-m68hc11.c (m68hc11_relax_group): New to relax group of 
instructions.
	(m68hc11_direct_relax): New to define table of relaxable instructions.
	(find_relaxable_insn): New, find a relaxable insn.
	(compare_reloc): New to compare two relocs.
	(m68hc11_elf_relax_section): New, relax text sections.
	(m68hc11_elf_relax_delete_bytes): New, delete bytes and adjust branchs.
	(elf32_m68hc11_check_relocs): New function for GC support.
	(elf32_m68hc11_relocate_section): New function for GC support.
	(bfd_elf32_bfd_relax_section): Define to support linker relaxation.
	(elf_backend_check_relocs): Likewise.
	(elf_backend_relocate_section): Likewise.
2002-08-14 08:14:30 +00:00

1649 lines
49 KiB
C
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/* Motorola 68HC11-specific support for 32-bit ELF
Copyright 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
Contributed by Stephane Carrez (stcarrez@nerim.fr)
(Heavily copied from the D10V port by Martin Hunt (hunt@cygnus.com))
This file is part of BFD, the Binary File Descriptor library.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "bfd.h"
#include "sysdep.h"
#include "bfdlink.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf/m68hc11.h"
static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
PARAMS ((bfd * abfd, bfd_reloc_code_real_type code));
static void m68hc11_info_to_howto_rel
PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *));
static bfd_reloc_status_type m68hc11_elf_ignore_reloc
PARAMS ((bfd *abfd, arelent *reloc_entry,
asymbol *symbol, PTR data, asection *input_section,
bfd *output_bfd, char **error_message));
/* GC mark and sweep. */
static asection *elf32_m68hc11_gc_mark_hook
PARAMS ((bfd *abfd, struct bfd_link_info *info,
Elf_Internal_Rela *rel, struct elf_link_hash_entry *h,
Elf_Internal_Sym *sym));
static boolean elf32_m68hc11_gc_sweep_hook
PARAMS ((bfd *abfd, struct bfd_link_info *info,
asection *sec, const Elf_Internal_Rela *relocs));
static boolean elf32_m68hc11_check_relocs
PARAMS ((bfd * abfd, struct bfd_link_info * info,
asection * sec, const Elf_Internal_Rela * relocs));
static boolean elf32_m68hc11_relocate_section
PARAMS ((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 boolean m68hc11_elf_relax_section
PARAMS ((bfd *, asection *, struct bfd_link_info *, boolean *));
static void m68hc11_elf_relax_delete_bytes
PARAMS ((bfd *abfd, asection *sec, bfd_vma addr, int count));
static void m68hc11_relax_group
PARAMS ((bfd *abfd, asection *sec, bfd_byte *contents,
unsigned value, unsigned long offset, unsigned long end_group));
static int compare_reloc PARAMS ((const void*, const void*));
boolean _bfd_m68hc11_elf_merge_private_bfd_data PARAMS ((bfd*, bfd*));
boolean _bfd_m68hc11_elf_set_private_flags PARAMS ((bfd*, flagword));
boolean _bfd_m68hc11_elf_print_private_bfd_data PARAMS ((bfd*, PTR));
/* Use REL instead of RELA to save space */
#define USE_REL
/* The Motorola 68HC11 microcontroler only addresses 64Kb.
We must handle 8 and 16-bit relocations. The 32-bit relocation
is defined but not used except by gas when -gstabs is used (which
is wrong).
The 3-bit and 16-bit PC rel relocation is only used by 68HC12. */
static reloc_howto_type elf_m68hc11_howto_table[] = {
/* This reloc does nothing. */
HOWTO (R_M68HC11_NONE, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont,/* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M68HC11_NONE", /* name */
false, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
false), /* pcrel_offset */
/* A 8 bit absolute relocation */
HOWTO (R_M68HC11_8, /* type */
0, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
8, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M68HC11_8", /* name */
false, /* partial_inplace */
0x00ff, /* src_mask */
0x00ff, /* dst_mask */
false), /* pcrel_offset */
/* A 8 bit absolute relocation (upper address) */
HOWTO (R_M68HC11_HI8, /* type */
8, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
8, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M68HC11_HI8", /* name */
false, /* partial_inplace */
0x00ff, /* src_mask */
0x00ff, /* dst_mask */
false), /* pcrel_offset */
/* A 8 bit absolute relocation (upper address) */
HOWTO (R_M68HC11_LO8, /* type */
0, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
8, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M68HC11_LO8", /* name */
false, /* partial_inplace */
0x00ff, /* src_mask */
0x00ff, /* dst_mask */
false), /* pcrel_offset */
/* A 8 bit PC-rel relocation */
HOWTO (R_M68HC11_PCREL_8, /* type */
0, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
8, /* bitsize */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M68HC11_PCREL_8", /* name */
false, /* partial_inplace */
0x00ff, /* src_mask */
0x00ff, /* dst_mask */
false), /* pcrel_offset */
/* A 16 bit absolute relocation */
HOWTO (R_M68HC11_16, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont /*bitfield */ , /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M68HC11_16", /* name */
false, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* A 32 bit absolute relocation. This one is never used for the
code relocation. It's used by gas for -gstabs generation. */
HOWTO (R_M68HC11_32, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M68HC11_32", /* name */
false, /* partial_inplace */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
false), /* pcrel_offset */
/* A 3 bit absolute relocation */
HOWTO (R_M68HC11_3B, /* type */
0, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
3, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M68HC11_4B", /* name */
false, /* partial_inplace */
0x003, /* src_mask */
0x003, /* dst_mask */
false), /* pcrel_offset */
/* A 16 bit PC-rel relocation */
HOWTO (R_M68HC11_PCREL_16, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M68HC11_PCREL_16", /* name */
false, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* GNU extension to record C++ vtable hierarchy */
HOWTO (R_M68HC11_GNU_VTINHERIT, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
0, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
NULL, /* special_function */
"R_M68HC11_GNU_VTINHERIT", /* name */
false, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
false), /* pcrel_offset */
/* GNU extension to record C++ vtable member usage */
HOWTO (R_M68HC11_GNU_VTENTRY, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
0, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
_bfd_elf_rel_vtable_reloc_fn, /* special_function */
"R_M68HC11_GNU_VTENTRY", /* name */
false, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
false), /* pcrel_offset */
/* A 24 bit relocation */
HOWTO (R_M68HC11_24, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
24, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M68HC11_24", /* name */
false, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* A 16-bit low relocation */
HOWTO (R_M68HC11_LO16, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M68HC11_LO16", /* name */
false, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* A page relocation */
HOWTO (R_M68HC11_PAGE, /* type */
0, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
8, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M68HC11_PAGE", /* name */
false, /* partial_inplace */
0x00ff, /* src_mask */
0x00ff, /* dst_mask */
false), /* pcrel_offset */
EMPTY_HOWTO (14),
EMPTY_HOWTO (15),
EMPTY_HOWTO (16),
EMPTY_HOWTO (17),
EMPTY_HOWTO (18),
EMPTY_HOWTO (19),
/* Mark beginning of a jump instruction (any form). */
HOWTO (R_M68HC11_RL_JUMP, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
0, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
m68hc11_elf_ignore_reloc, /* special_function */
"R_M68HC11_RL_JUMP", /* name */
true, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
true), /* pcrel_offset */
/* Mark beginning of Gcc relaxation group instruction. */
HOWTO (R_M68HC11_RL_GROUP, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
0, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
m68hc11_elf_ignore_reloc, /* special_function */
"R_M68HC11_RL_GROUP", /* name */
true, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
true), /* pcrel_offset */
};
/* Map BFD reloc types to M68HC11 ELF reloc types. */
struct m68hc11_reloc_map
{
bfd_reloc_code_real_type bfd_reloc_val;
unsigned char elf_reloc_val;
};
static const struct m68hc11_reloc_map m68hc11_reloc_map[] = {
{BFD_RELOC_NONE, R_M68HC11_NONE,},
{BFD_RELOC_8, R_M68HC11_8},
{BFD_RELOC_M68HC11_HI8, R_M68HC11_HI8},
{BFD_RELOC_M68HC11_LO8, R_M68HC11_LO8},
{BFD_RELOC_8_PCREL, R_M68HC11_PCREL_8},
{BFD_RELOC_16_PCREL, R_M68HC11_PCREL_16},
{BFD_RELOC_16, R_M68HC11_16},
{BFD_RELOC_32, R_M68HC11_32},
{BFD_RELOC_M68HC11_3B, R_M68HC11_3B},
{BFD_RELOC_VTABLE_INHERIT, R_M68HC11_GNU_VTINHERIT},
{BFD_RELOC_VTABLE_ENTRY, R_M68HC11_GNU_VTENTRY},
{BFD_RELOC_M68HC11_LO16, R_M68HC11_LO16},
{BFD_RELOC_M68HC11_PAGE, R_M68HC11_PAGE},
{BFD_RELOC_M68HC11_24, R_M68HC11_24},
{BFD_RELOC_M68HC11_RL_JUMP, R_M68HC11_RL_JUMP},
{BFD_RELOC_M68HC11_RL_GROUP, R_M68HC11_RL_GROUP},
};
static reloc_howto_type *
bfd_elf32_bfd_reloc_type_lookup (abfd, code)
bfd *abfd ATTRIBUTE_UNUSED;
bfd_reloc_code_real_type code;
{
unsigned int i;
for (i = 0;
i < sizeof (m68hc11_reloc_map) / sizeof (struct m68hc11_reloc_map);
i++)
{
if (m68hc11_reloc_map[i].bfd_reloc_val == code)
return &elf_m68hc11_howto_table[m68hc11_reloc_map[i].elf_reloc_val];
}
return NULL;
}
/* This function is used for relocs which are only used for relaxing,
which the linker should otherwise ignore. */
static bfd_reloc_status_type
m68hc11_elf_ignore_reloc (abfd, reloc_entry, symbol, data, input_section,
output_bfd, error_message)
bfd *abfd ATTRIBUTE_UNUSED;
arelent *reloc_entry;
asymbol *symbol ATTRIBUTE_UNUSED;
PTR data ATTRIBUTE_UNUSED;
asection *input_section;
bfd *output_bfd;
char **error_message ATTRIBUTE_UNUSED;
{
if (output_bfd != NULL)
reloc_entry->address += input_section->output_offset;
return bfd_reloc_ok;
}
/* Set the howto pointer for an M68HC11 ELF reloc. */
static void
m68hc11_info_to_howto_rel (abfd, cache_ptr, dst)
bfd *abfd ATTRIBUTE_UNUSED;
arelent *cache_ptr;
Elf32_Internal_Rel *dst;
{
unsigned int r_type;
r_type = ELF32_R_TYPE (dst->r_info);
BFD_ASSERT (r_type < (unsigned int) R_M68HC11_max);
cache_ptr->howto = &elf_m68hc11_howto_table[r_type];
}
static asection *
elf32_m68hc11_gc_mark_hook (abfd, info, rel, h, sym)
bfd *abfd;
struct bfd_link_info *info ATTRIBUTE_UNUSED;
Elf_Internal_Rela *rel;
struct elf_link_hash_entry *h;
Elf_Internal_Sym *sym;
{
if (h != NULL)
{
switch (ELF32_R_TYPE (rel->r_info))
{
default:
switch (h->root.type)
{
case bfd_link_hash_defined:
case bfd_link_hash_defweak:
return h->root.u.def.section;
case bfd_link_hash_common:
return h->root.u.c.p->section;
default:
break;
}
}
}
else
{
if (!(elf_bad_symtab (abfd)
&& ELF_ST_BIND (sym->st_info) != STB_LOCAL)
&& !((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
&& sym->st_shndx != SHN_COMMON))
{
return bfd_section_from_elf_index (abfd, sym->st_shndx);
}
}
return NULL;
}
static boolean
elf32_m68hc11_gc_sweep_hook (abfd, info, sec, relocs)
bfd *abfd ATTRIBUTE_UNUSED;
struct bfd_link_info *info ATTRIBUTE_UNUSED;
asection *sec ATTRIBUTE_UNUSED;
const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
{
/* We don't use got and plt entries for 68hc11/68hc12. */
return true;
}
struct m68hc11_direct_relax
{
const char *name;
unsigned char code;
unsigned char direct_code;
} m68hc11_direct_relax_table[] = {
{ "adca", 0xB9, 0x99 },
{ "adcb", 0xF9, 0xD9 },
{ "adda", 0xBB, 0x9B },
{ "addb", 0xFB, 0xDB },
{ "addd", 0xF3, 0xD3 },
{ "anda", 0xB4, 0x94 },
{ "andb", 0xF4, 0xD4 },
{ "cmpa", 0xB1, 0x91 },
{ "cmpb", 0xF1, 0xD1 },
{ "cpd", 0xB3, 0x93 },
{ "cpxy", 0xBC, 0x9C },
/* { "cpy", 0xBC, 0x9C }, */
{ "eora", 0xB8, 0x98 },
{ "eorb", 0xF8, 0xD8 },
{ "jsr", 0xBD, 0x9D },
{ "ldaa", 0xB6, 0x96 },
{ "ldab", 0xF6, 0xD6 },
{ "ldd", 0xFC, 0xDC },
{ "lds", 0xBE, 0x9E },
{ "ldxy", 0xFE, 0xDE },
/* { "ldy", 0xFE, 0xDE },*/
{ "oraa", 0xBA, 0x9A },
{ "orab", 0xFA, 0xDA },
{ "sbca", 0xB2, 0x92 },
{ "sbcb", 0xF2, 0xD2 },
{ "staa", 0xB7, 0x97 },
{ "stab", 0xF7, 0xD7 },
{ "std", 0xFD, 0xDD },
{ "sts", 0xBF, 0x9F },
{ "stxy", 0xFF, 0xDF },
/* { "sty", 0xFF, 0xDF },*/
{ "suba", 0xB0, 0x90 },
{ "subb", 0xF0, 0xD0 },
{ "subd", 0xB3, 0x93 },
{ 0, 0, 0 }
};
static struct m68hc11_direct_relax *
find_relaxable_insn (unsigned char code)
{
int i;
for (i = 0; m68hc11_direct_relax_table[i].name; i++)
if (m68hc11_direct_relax_table[i].code == code)
return &m68hc11_direct_relax_table[i];
return 0;
}
static int
compare_reloc (e1, e2)
const void *e1;
const void *e2;
{
const Elf_Internal_Rela *i1 = (const Elf_Internal_Rela *) e1;
const Elf_Internal_Rela *i2 = (const Elf_Internal_Rela *) e2;
if (i1->r_offset == i2->r_offset)
return 0;
else
return i1->r_offset < i2->r_offset ? -1 : 1;
}
#define M6811_OP_LDX_IMMEDIATE (0xCE)
static void
m68hc11_relax_group (abfd, sec, contents, value, offset, end_group)
bfd *abfd;
asection *sec;
bfd_byte *contents;
unsigned value;
unsigned long offset;
unsigned long end_group;
{
unsigned char code;
unsigned long start_offset;
unsigned long ldx_offset = offset;
unsigned long ldx_size;
int can_delete_ldx;
int relax_ldy = 0;
/* First instruction of the relax group must be a
LDX #value or LDY #value. If this is not the case,
ignore the relax group. */
code = bfd_get_8 (abfd, contents + offset);
if (code == 0x18)
{
relax_ldy++;
offset++;
code = bfd_get_8 (abfd, contents + offset);
}
ldx_size = offset - ldx_offset + 3;
offset += 3;
if (code != M6811_OP_LDX_IMMEDIATE || offset >= end_group)
return;
/* We can remove the LDX/LDY only when all bset/brclr instructions
of the relax group have been converted to use direct addressing
mode. */
can_delete_ldx = 1;
while (offset < end_group)
{
unsigned isize;
unsigned new_value;
int bset_use_y;
bset_use_y = 0;
start_offset = offset;
code = bfd_get_8 (abfd, contents + offset);
if (code == 0x18)
{
bset_use_y++;
offset++;
code = bfd_get_8 (abfd, contents + offset);
}
/* Check the instruction and translate to use direct addressing mode. */
switch (code)
{
/* bset */
case 0x1C:
code = 0x14;
isize = 3;
break;
/* brclr */
case 0x1F:
code = 0x13;
isize = 4;
break;
/* brset */
case 0x1E:
code = 0x12;
isize = 4;
break;
/* bclr */
case 0x1D:
code = 0x15;
isize = 3;
break;
/* This instruction is not recognized and we are not
at end of the relax group. Ignore and don't remove
the first LDX (we don't know what it is used for...). */
default:
return;
}
new_value = (unsigned) bfd_get_8 (abfd, contents + offset + 1);
new_value += value;
if ((new_value & 0xff00) == 0 && bset_use_y == relax_ldy)
{
bfd_put_8 (abfd, code, contents + offset);
bfd_put_8 (abfd, new_value, contents + offset + 1);
if (start_offset != offset)
{
m68hc11_elf_relax_delete_bytes (abfd, sec, start_offset,
offset - start_offset);
end_group--;
}
}
else
{
can_delete_ldx = 0;
}
offset = start_offset + isize;
}
if (can_delete_ldx)
{
/* Remove the move instruction (3 or 4 bytes win). */
m68hc11_elf_relax_delete_bytes (abfd, sec, ldx_offset, ldx_size);
}
}
/* This function handles relaxing for the 68HC11.
and somewhat more difficult to support. */
static boolean
m68hc11_elf_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_Shdr *shndx_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;
Elf_Internal_Rela *prev_insn_branch = NULL;
Elf_Internal_Rela *prev_insn_group = NULL;
unsigned insn_group_value = 0;
Elf_External_Sym_Shndx *shndx_buf = 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;
shndx_hdr = &elf_tdata (abfd)->symtab_shndx_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;
/* Checking for branch relaxation relies on the relocations to
be sorted on 'r_offset'. This is not guaranteed so we must sort. */
qsort (internal_relocs, sec->reloc_count, sizeof (Elf_Internal_Rela),
compare_reloc);
/* Walk through them looking for relaxing opportunities. */
irelend = internal_relocs + sec->reloc_count;
for (irel = internal_relocs; irel < irelend; irel++)
{
bfd_vma symval;
bfd_vma value;
Elf_Internal_Sym isym;
/* If this isn't something that can be relaxed, then ignore
this reloc. */
if (ELF32_R_TYPE (irel->r_info) != (int) R_M68HC11_16
&& ELF32_R_TYPE (irel->r_info) != (int) R_M68HC11_RL_JUMP
&& ELF32_R_TYPE (irel->r_info) != (int) R_M68HC11_RL_GROUP)
{
prev_insn_branch = 0;
prev_insn_group = 0;
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. */
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;
}
}
/* Try to eliminate an unconditional 8 bit pc-relative branch
which immediately follows a conditional 8 bit pc-relative
branch around the unconditional branch.
original: new:
bCC lab1 bCC' lab2
bra lab2
lab1: lab1:
This happens when the bCC can't reach lab2 at assembly time,
but due to other relaxations it can reach at link time. */
if (ELF32_R_TYPE (irel->r_info) == (int) R_M68HC11_RL_JUMP)
{
Elf_Internal_Rela *nrel;
unsigned char code;
unsigned char roffset;
prev_insn_branch = 0;
prev_insn_group = 0;
/* Do nothing if this reloc is the last byte in the section. */
if (irel->r_offset == sec->_cooked_size)
continue;
/* See if the next instruction is an unconditional pc-relative
branch, more often than not this test will fail, so we
test it first to speed things up. */
code = bfd_get_8 (abfd, contents + irel->r_offset + 2);
if (code != 0x7e)
continue;
/* Also make sure the next relocation applies to the next
instruction and that it's a pc-relative 8 bit branch. */
nrel = irel + 1;
if (nrel == irelend
|| irel->r_offset + 3 != nrel->r_offset
|| ELF32_R_TYPE (nrel->r_info) != (int) R_M68HC11_16)
continue;
/* Make sure our destination immediately follows the
unconditional branch. */
roffset = bfd_get_8 (abfd, contents + irel->r_offset + 1);
if (roffset != 3)
continue;
prev_insn_branch = irel;
prev_insn_group = 0;
continue;
}
/* 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. */
bfd_size_type amt = symtab_hdr->sh_size;
extsyms = (Elf32_External_Sym *) bfd_malloc (amt);
if (extsyms == NULL)
goto error_return;
free_extsyms = extsyms;
if (bfd_seek (abfd, symtab_hdr->sh_offset, SEEK_SET) != 0
|| bfd_bread ((PTR) extsyms, amt, abfd) != amt)
goto error_return;
}
if (shndx_hdr->sh_size != 0)
{
bfd_size_type amt;
amt = symtab_hdr->sh_info * sizeof (Elf_External_Sym_Shndx);
shndx_buf = (Elf_External_Sym_Shndx *) bfd_malloc (amt);
if (shndx_buf == NULL)
goto error_return;
if (bfd_seek (abfd, shndx_hdr->sh_offset, SEEK_SET) != 0
|| bfd_bread ((PTR) shndx_buf, amt, abfd) != amt)
goto error_return;
shndx_hdr->contents = (PTR) shndx_buf;
}
}
/* Get the value of the symbol referred to by the reloc. */
if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
{
Elf32_External_Sym *esym;
Elf_External_Sym_Shndx *shndx;
asection *sym_sec;
/* A local symbol. */
esym = extsyms + ELF32_R_SYM (irel->r_info);
shndx = shndx_buf + (shndx_buf ? ELF32_R_SYM (irel->r_info) : 0);
bfd_elf32_swap_symbol_in (abfd, esym, shndx, &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. */
prev_insn_branch = 0;
prev_insn_group = 0;
continue;
}
symval = (h->root.u.def.value
+ h->root.u.def.section->output_section->vma
+ h->root.u.def.section->output_offset);
}
if (ELF32_R_TYPE (irel->r_info) == (int) R_M68HC11_RL_GROUP)
{
prev_insn_branch = 0;
prev_insn_group = 0;
/* Do nothing if this reloc is the last byte in the section. */
if (irel->r_offset == sec->_cooked_size)
continue;
prev_insn_group = irel;
insn_group_value = isym.st_value;
continue;
}
value = symval;
/* Try to turn a far branch to a near branch. */
if (ELF32_R_TYPE (irel->r_info) == (int) R_M68HC11_16
&& prev_insn_branch)
{
bfd_vma offset;
unsigned char code;
offset = value - (prev_insn_branch->r_offset
+ sec->output_section->vma
+ sec->output_offset + 2);
/* If the offset is still out of -128..+127 range,
leave that far branch unchanged. */
if ((offset & 0xff80) != 0 && (offset & 0xff80) != 0xff80)
{
prev_insn_branch = 0;
continue;
}
/* Shrink the branch. */
code = bfd_get_8 (abfd, contents + prev_insn_branch->r_offset);
if (code == 0x7e)
{
code = 0x20;
bfd_put_8 (abfd, code, contents + prev_insn_branch->r_offset);
bfd_put_8 (abfd, offset,
contents + prev_insn_branch->r_offset + 1);
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
R_M68HC11_NONE);
m68hc11_elf_relax_delete_bytes (abfd, sec,
irel->r_offset, 1);
}
else
{
code ^= 0x1;
bfd_put_8 (abfd, code, contents + prev_insn_branch->r_offset);
bfd_put_8 (abfd, offset,
contents + prev_insn_branch->r_offset + 1);
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
R_M68HC11_NONE);
m68hc11_elf_relax_delete_bytes (abfd, sec,
irel->r_offset - 1, 3);
}
prev_insn_branch = 0;
}
/* Try to turn a 16 bit address into a 8 bit page0 address. */
else if (ELF32_R_TYPE (irel->r_info) == (int) R_M68HC11_16
&& (value & 0xff00) == 0)
{
unsigned char code;
unsigned short offset;
struct m68hc11_direct_relax *rinfo;
prev_insn_branch = 0;
offset = bfd_get_16 (abfd, contents + irel->r_offset);
offset += value;
if ((offset & 0xff00) != 0)
{
prev_insn_group = 0;
continue;
}
if (prev_insn_group)
{
/* Note that we've changed the reldection 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;
m68hc11_relax_group (abfd, sec, contents, offset,
prev_insn_group->r_offset,
insn_group_value);
irel = prev_insn_group;
prev_insn_group = 0;
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
R_M68HC11_NONE);
continue;
}
/* Get the opcode. */
code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
rinfo = find_relaxable_insn (code);
if (rinfo == 0)
{
prev_insn_group = 0;
continue;
}
/* Note that we've changed the reldection 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;
/* Fix the opcode. */
/* printf ("A relaxable case : 0x%02x (%s)\n",
code, rinfo->name); */
bfd_put_8 (abfd, rinfo->direct_code,
contents + irel->r_offset - 1);
/* Delete one byte of data (upper byte of address). */
m68hc11_elf_relax_delete_bytes (abfd, sec, irel->r_offset, 1);
/* Fix the relocation's type. */
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
R_M68HC11_8);
/* That will change things, so, we should relax again.
Note that this is not required, and it may be slow. */
*again = true;
}
else if (ELF32_R_TYPE (irel->r_info) == R_M68HC11_16)
{
unsigned char code;
bfd_vma offset;
prev_insn_branch = 0;
code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
if (code == 0x7e)
{
offset = value - (irel->r_offset
+ sec->output_section->vma
+ sec->output_offset + 1);
offset += bfd_get_16 (abfd, contents + irel->r_offset);
/* If the offset is still out of -128..+127 range,
leave that far branch unchanged. */
if ((offset & 0xff80) == 0 || (offset & 0xff80) == 0xff80)
{
/* Note that we've changed the reldection 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;
/* Shrink the branch. */
code = 0x20;
bfd_put_8 (abfd, code,
contents + irel->r_offset - 1);
bfd_put_8 (abfd, offset,
contents + irel->r_offset);
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
R_M68HC11_NONE);
m68hc11_elf_relax_delete_bytes (abfd, sec,
irel->r_offset + 1, 1);
}
}
}
prev_insn_branch = 0;
}
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 = (unsigned char *) 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 void
m68hc11_elf_relax_delete_bytes (abfd, sec, addr, count)
bfd *abfd;
asection *sec;
bfd_vma addr;
int count;
{
Elf_Internal_Shdr *symtab_hdr;
Elf_Internal_Shdr *shndx_hdr;
Elf32_External_Sym *extsyms;
unsigned int sec_shndx;
Elf_External_Sym_Shndx *shndx;
bfd_byte *contents;
Elf_Internal_Rela *irel, *irelend;
bfd_vma toaddr;
Elf32_External_Sym *esym, *esymend;
struct elf_link_hash_entry **sym_hashes;
struct elf_link_hash_entry **end_hashes;
unsigned int symcount;
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
extsyms = (Elf32_External_Sym *) symtab_hdr->contents;
sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
contents = elf_section_data (sec)->this_hdr.contents;
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,
(size_t) (toaddr - addr - count));
sec->_cooked_size -= count;
/* Adjust all the relocs. */
for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
{
unsigned char code;
unsigned char offset;
unsigned short raddr;
unsigned long old_offset;
int branch_pos;
old_offset = irel->r_offset;
/* See if this reloc was for the bytes we have deleted, in which
case we no longer care about it. Don't delete relocs which
represent addresses, though. */
if (ELF32_R_TYPE (irel->r_info) != R_M68HC11_RL_JUMP
&& irel->r_offset >= addr && irel->r_offset < addr + count)
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
R_M68HC11_NONE);
if (ELF32_R_TYPE (irel->r_info) == R_M68HC11_NONE)
continue;
/* Get the new reloc address. */
if ((irel->r_offset > addr
&& irel->r_offset < toaddr))
irel->r_offset -= count;
/* If this is a PC relative reloc, see if the range it covers
includes the bytes we have deleted. */
switch (ELF32_R_TYPE (irel->r_info))
{
default:
break;
case R_M68HC11_RL_JUMP:
code = bfd_get_8 (abfd, contents + irel->r_offset);
switch (code)
{
/* jsr and jmp instruction are also marked with RL_JUMP
relocs but no adjustment must be made. */
case 0x7e:
case 0x9d:
case 0xbd:
continue;
case 0x12:
case 0x13:
branch_pos = 3;
raddr = 4;
/* Special case when we translate a brclr N,y into brclr *<addr>
In this case, the 0x18 page2 prefix is removed.
The reloc offset is not modified but the instruction
size is reduced by 1. */
if (old_offset == addr)
raddr++;
break;
case 0x1e:
case 0x1f:
branch_pos = 3;
raddr = 4;
break;
case 0x18:
branch_pos = 4;
raddr = 5;
break;
default:
branch_pos = 1;
raddr = 2;
break;
}
offset = bfd_get_8 (abfd, contents + irel->r_offset + branch_pos);
raddr += old_offset;
raddr += ((unsigned short) offset | ((offset & 0x80) ? 0xff00 : 0));
if (irel->r_offset < addr && raddr >= addr)
{
offset -= count;
bfd_put_8 (abfd, offset, contents + irel->r_offset + branch_pos);
}
else if (irel->r_offset >= addr && raddr <= addr)
{
offset += count;
bfd_put_8 (abfd, offset, contents + irel->r_offset + branch_pos);
}
else
{
/*printf ("Not adjusted 0x%04x [0x%4x 0x%4x]\n", raddr,
irel->r_offset, addr);*/
}
break;
}
}
/* Adjust the local symbols defined in this section. */
shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
shndx = (Elf_External_Sym_Shndx *) shndx_hdr->contents;
esym = extsyms;
esymend = esym + symtab_hdr->sh_info;
for (; esym < esymend; esym++, shndx = (shndx ? shndx + 1 : NULL))
{
Elf_Internal_Sym isym;
Elf_External_Sym_Shndx dummy;
bfd_elf32_swap_symbol_in (abfd, esym, shndx, &isym);
if (isym.st_shndx == sec_shndx
&& isym.st_value > addr
&& isym.st_value < toaddr)
{
isym.st_value -= count;
bfd_elf32_swap_symbol_out (abfd, &isym, esym, &dummy);
}
}
/* 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;
}
}
}
/* Look through the relocs for a section during the first phase.
Since we don't do .gots or .plts, we just need to consider the
virtual table relocs for gc. */
static boolean
elf32_m68hc11_check_relocs (abfd, info, sec, relocs)
bfd * abfd;
struct bfd_link_info * info;
asection * sec;
const Elf_Internal_Rela * relocs;
{
Elf_Internal_Shdr * symtab_hdr;
struct elf_link_hash_entry ** sym_hashes;
struct elf_link_hash_entry ** sym_hashes_end;
const Elf_Internal_Rela * rel;
const Elf_Internal_Rela * rel_end;
if (info->relocateable)
return true;
symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (abfd);
sym_hashes_end = sym_hashes + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
if (!elf_bad_symtab (abfd))
sym_hashes_end -= symtab_hdr->sh_info;
rel_end = relocs + sec->reloc_count;
for (rel = relocs; rel < rel_end; rel++)
{
struct elf_link_hash_entry * h;
unsigned long r_symndx;
r_symndx = ELF32_R_SYM (rel->r_info);
if (r_symndx < symtab_hdr->sh_info)
h = NULL;
else
h = sym_hashes [r_symndx - symtab_hdr->sh_info];
switch (ELF32_R_TYPE (rel->r_info))
{
/* This relocation describes the C++ object vtable hierarchy.
Reconstruct it for later use during GC. */
case R_M68HC11_GNU_VTINHERIT:
if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
return false;
break;
/* This relocation describes which C++ vtable entries are actually
used. Record for later use during GC. */
case R_M68HC11_GNU_VTENTRY:
if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
return false;
break;
}
}
return true;
}
/* Relocate a 68hc11/68hc12 ELF section. */
static boolean
elf32_m68hc11_relocate_section (output_bfd, info, input_bfd, input_section,
contents, relocs, local_syms, local_sections)
bfd *output_bfd ATTRIBUTE_UNUSED;
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;
const char *name;
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;
reloc_howto_type *howto;
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 (r_type == R_M68HC11_GNU_VTENTRY
|| r_type == R_M68HC11_GNU_VTINHERIT )
continue;
howto = elf_m68hc11_howto_table + r_type;
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;
}
}
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);
}
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
contents, rel->r_offset,
relocation, rel->r_addend);
if (r != bfd_reloc_ok)
{
const char * msg = (const char *) 0;
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;
}
/* Set and control ELF flags in ELF header. */
boolean
_bfd_m68hc11_elf_set_private_flags (abfd, flags)
bfd *abfd;
flagword flags;
{
BFD_ASSERT (!elf_flags_init (abfd)
|| elf_elfheader (abfd)->e_flags == flags);
elf_elfheader (abfd)->e_flags = flags;
elf_flags_init (abfd) = true;
return true;
}
/* Merge backend specific data from an object file to the output
object file when linking. */
boolean
_bfd_m68hc11_elf_merge_private_bfd_data (ibfd, obfd)
bfd *ibfd;
bfd *obfd;
{
flagword old_flags;
flagword new_flags;
boolean ok = true;
/* Check if we have the same endianess */
if (_bfd_generic_verify_endian_match (ibfd, obfd) == false)
return false;
if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
return true;
new_flags = elf_elfheader (ibfd)->e_flags;
elf_elfheader (obfd)->e_flags |= new_flags & EF_M68HC11_ABI;
old_flags = elf_elfheader (obfd)->e_flags;
if (! elf_flags_init (obfd))
{
elf_flags_init (obfd) = true;
elf_elfheader (obfd)->e_flags = new_flags;
elf_elfheader (obfd)->e_ident[EI_CLASS]
= elf_elfheader (ibfd)->e_ident[EI_CLASS];
if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
&& bfd_get_arch_info (obfd)->the_default)
{
if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
bfd_get_mach (ibfd)))
return false;
}
return true;
}
/* Check ABI compatibility. */
if ((new_flags & E_M68HC11_I32) != (old_flags & E_M68HC11_I32))
{
(*_bfd_error_handler)
(_("%s: linking files compiled for 16-bit integers (-mshort) "
"and others for 32-bit integers"),
bfd_archive_filename (ibfd));
ok = false;
}
if ((new_flags & E_M68HC11_F64) != (old_flags & E_M68HC11_F64))
{
(*_bfd_error_handler)
(_("%s: linking files compiled for 32-bit double (-fshort-double) "
"and others for 64-bit double"),
bfd_archive_filename (ibfd));
ok = false;
}
new_flags &= ~EF_M68HC11_ABI;
old_flags &= ~EF_M68HC11_ABI;
/* Warn about any other mismatches */
if (new_flags != old_flags)
{
(*_bfd_error_handler)
(_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
bfd_archive_filename (ibfd), (unsigned long) new_flags,
(unsigned long) old_flags);
ok = false;
}
if (! ok)
{
bfd_set_error (bfd_error_bad_value);
return false;
}
return true;
}
boolean
_bfd_m68hc11_elf_print_private_bfd_data (abfd, ptr)
bfd *abfd;
PTR ptr;
{
FILE *file = (FILE *) ptr;
BFD_ASSERT (abfd != NULL && ptr != NULL);
/* Print normal ELF private data. */
_bfd_elf_print_private_bfd_data (abfd, ptr);
/* xgettext:c-format */
fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
if (elf_elfheader (abfd)->e_flags & E_M68HC11_I32)
fprintf (file, _("[abi=32-bit int,"));
else
fprintf (file, _("[abi=16-bit int,"));
if (elf_elfheader (abfd)->e_flags & E_M68HC11_F64)
fprintf (file, _(" 64-bit double]"));
else
fprintf (file, _(" 32-bit double]"));
if (elf_elfheader (abfd)->e_flags & E_M68HC12_BANKS)
fprintf (file, _(" [memory=bank-model]"));
else
fprintf (file, _(" [memory=flat]"));
fputc ('\n', file);
return true;
}
/* Below is the only difference between elf32-m68hc12.c and elf32-m68hc11.c.
The Motorola spec says to use a different Elf machine code. */
#define ELF_ARCH bfd_arch_m68hc11
#define ELF_MACHINE_CODE EM_68HC11
#define ELF_MAXPAGESIZE 0x1000
#define TARGET_BIG_SYM bfd_elf32_m68hc11_vec
#define TARGET_BIG_NAME "elf32-m68hc11"
#define elf_info_to_howto 0
#define elf_info_to_howto_rel m68hc11_info_to_howto_rel
#define bfd_elf32_bfd_relax_section m68hc11_elf_relax_section
#define elf_backend_gc_mark_hook elf32_m68hc11_gc_mark_hook
#define elf_backend_gc_sweep_hook elf32_m68hc11_gc_sweep_hook
#define elf_backend_check_relocs elf32_m68hc11_check_relocs
#define elf_backend_relocate_section elf32_m68hc11_relocate_section
#define elf_backend_object_p 0
#define elf_backend_final_write_processing 0
#define elf_backend_can_gc_sections 1
#define bfd_elf32_bfd_merge_private_bfd_data \
_bfd_m68hc11_elf_merge_private_bfd_data
#define bfd_elf32_bfd_set_private_flags _bfd_m68hc11_elf_set_private_flags
#define bfd_elf32_bfd_print_private_bfd_data \
_bfd_m68hc11_elf_print_private_bfd_data
#include "elf32-target.h"
Reference in New Issue View Git Blame Copy Permalink