/* BFD back-end for Intel i860 COFF files.

Copyright (C) 1990-2016 Free Software Foundation, Inc.

Created mostly by substituting "860" for "386" in coff-i386.c

Harry Dolan <dolan@ssd.intel.com>, October 1995

This file is part of BFD, the Binary File Descriptor library.

This program is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 3 of the License, or

(at your option) any later version.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program; if not, write to the Free Software

Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,

MA 02110-1301, USA. */

#include "sysdep.h"

#include "bfd.h"

#include "libbfd.h"

#include "coff/i860.h"

#include "coff/internal.h"

#ifndef bfd_pe_print_pdata

#define bfd_pe_print_pdata NULL

#endif

#include "libcoff.h"

#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2)

/* The page size is a guess based on ELF. */

#define COFF_PAGE_SIZE 0x1000

/* For some reason when using i860 COFF the value stored in the .text

section for a reference to a common symbol is the value itself plus

any desired offset. Ian Taylor, Cygnus Support. */

/* If we are producing relocatable output, we need to do some

adjustments to the object file that are not done by the

bfd_perform_relocation function. This function is called by every

reloc type to make any required adjustments. */

static bfd_reloc_status_type

coff_i860_reloc (bfd *abfd,

char **error_message ATTRIBUTE_UNUSED)

{

symvalue diff;

if (output_bfd == (bfd *) NULL)

return bfd_reloc_continue;

if (bfd_is_com_section (symbol->section))

{

/* We are relocating a common symbol. The current value in the

object file is ORIG + OFFSET, where ORIG is the value of the

common symbol as seen by the object file when it was compiled

(this may be zero if the symbol was undefined) and OFFSET is

the offset into the common symbol (normally zero, but may be

non-zero when referring to a field in a common structure).

ORIG is the negative of reloc_entry->addend, which is set by

the CALC_ADDEND macro below. We want to replace the value in

the object file with NEW + OFFSET, where NEW is the value of

the common symbol which we are going to put in the final

object file. NEW is symbol->value. */

diff = symbol->value + reloc_entry->addend;

}

else

{

/* For some reason bfd_perform_relocation always effectively

ignores the addend for a COFF target when producing

relocatable output. This seems to be always wrong for 860

COFF, so we handle the addend here instead. */

diff = reloc_entry->addend;

}

#define DOIT(x) \

x = ((x & ~howto->dst_mask) | (((x & howto->src_mask) + diff) & howto->dst_mask))

if (diff != 0)

{

reloc_howto_type *howto = reloc_entry->howto;

unsigned char *addr = (unsigned char *) data + reloc_entry->address;

switch (howto->size)

{

case 0:

{

char x = bfd_get_8 (abfd, addr);

DOIT (x);

bfd_put_8 (abfd, x, addr);

}

break;

case 1:

{

short x = bfd_get_16 (abfd, addr);

DOIT (x);

bfd_put_16 (abfd, (bfd_vma) x, addr);

}

break;

case 2:

{

long x = bfd_get_32 (abfd, addr);

DOIT (x);

bfd_put_32 (abfd, (bfd_vma) x, addr);

}

break;

default:

abort ();

}

}

/* Now let bfd_perform_relocation finish everything up. */

return bfd_reloc_continue;

}

/* This is just a temporary measure until we teach bfd to generate

these relocations. */

static bfd_reloc_status_type

coff_i860_reloc_nyi (bfd *abfd ATTRIBUTE_UNUSED,

char **error_message ATTRIBUTE_UNUSED)

{

reloc_howto_type *howto = reloc_entry->howto;

_bfd_error_handler (_("relocation `%s' not yet implemented"), howto->name);

return bfd_reloc_notsupported;

}

#ifndef PCRELOFFSET

#define PCRELOFFSET FALSE

#endif

static reloc_howto_type howto_table[] =

{

EMPTY_HOWTO (0),

EMPTY_HOWTO (1),

EMPTY_HOWTO (2),

EMPTY_HOWTO (3),

EMPTY_HOWTO (4),

EMPTY_HOWTO (5),

HOWTO (R_DIR32, /* type */

0, /* rightshift */

2, /* size (0 = byte, 1 = short, 2 = long) */

32, /* bitsize */

FALSE, /* pc_relative */

0, /* bitpos */

complain_overflow_bitfield, /* complain_on_overflow */

coff_i860_reloc, /* special_function */

"dir32", /* name */

TRUE, /* partial_inplace */

0xffffffff, /* src_mask */

0xffffffff, /* dst_mask */

TRUE), /* pcrel_offset */

/* {7}, */

HOWTO (R_IMAGEBASE, /* type */

0, /* rightshift */

2, /* size (0 = byte, 1 = short, 2 = long) */

32, /* bitsize */

FALSE, /* pc_relative */

0, /* bitpos */

complain_overflow_bitfield, /* complain_on_overflow */

coff_i860_reloc, /* special_function */

"rva32", /* name */

TRUE, /* partial_inplace */

0xffffffff, /* src_mask */

0xffffffff, /* dst_mask */

FALSE), /* pcrel_offset */

EMPTY_HOWTO (010),

EMPTY_HOWTO (011),

EMPTY_HOWTO (012),

EMPTY_HOWTO (013),

EMPTY_HOWTO (014),

EMPTY_HOWTO (015),

EMPTY_HOWTO (016),

HOWTO (R_RELBYTE, /* type */

0, /* rightshift */

0, /* size (0 = byte, 1 = short, 2 = long) */

8, /* bitsize */

FALSE, /* pc_relative */

0, /* bitpos */

complain_overflow_bitfield, /* complain_on_overflow */

coff_i860_reloc, /* special_function */

"8", /* name */

TRUE, /* partial_inplace */

0x000000ff, /* src_mask */

0x000000ff, /* dst_mask */

PCRELOFFSET), /* pcrel_offset */

HOWTO (R_RELWORD, /* type */

0, /* rightshift */

1, /* size (0 = byte, 1 = short, 2 = long) */

16, /* bitsize */

FALSE, /* pc_relative */

0, /* bitpos */

complain_overflow_bitfield, /* complain_on_overflow */

coff_i860_reloc, /* special_function */

"16", /* name */

TRUE, /* partial_inplace */

0x0000ffff, /* src_mask */

0x0000ffff, /* dst_mask */

PCRELOFFSET), /* pcrel_offset */

HOWTO (R_RELLONG, /* type */

0, /* rightshift */

2, /* size (0 = byte, 1 = short, 2 = long) */

32, /* bitsize */

FALSE, /* pc_relative */

0, /* bitpos */

complain_overflow_bitfield, /* complain_on_overflow */

coff_i860_reloc, /* special_function */

"32", /* name */

TRUE, /* partial_inplace */

0xffffffff, /* src_mask */

0xffffffff, /* dst_mask */

PCRELOFFSET), /* pcrel_offset */

HOWTO (R_PCRBYTE, /* type */

0, /* rightshift */

0, /* size (0 = byte, 1 = short, 2 = long) */

8, /* bitsize */

TRUE, /* pc_relative */

0, /* bitpos */

complain_overflow_signed, /* complain_on_overflow */

coff_i860_reloc, /* special_function */

"DISP8", /* name */

TRUE, /* partial_inplace */

0x000000ff, /* src_mask */

0x000000ff, /* dst_mask */

PCRELOFFSET), /* pcrel_offset */

HOWTO (R_PCRWORD, /* type */

0, /* rightshift */

1, /* size (0 = byte, 1 = short, 2 = long) */

16, /* bitsize */

TRUE, /* pc_relative */

0, /* bitpos */

complain_overflow_signed, /* complain_on_overflow */

coff_i860_reloc, /* special_function */

"DISP16", /* name */

TRUE, /* partial_inplace */

0x0000ffff, /* src_mask */

0x0000ffff, /* dst_mask */

PCRELOFFSET), /* pcrel_offset */

HOWTO (R_PCRLONG, /* type */

0, /* rightshift */

2, /* size (0 = byte, 1 = short, 2 = long) */

32, /* bitsize */

TRUE, /* pc_relative */

0, /* bitpos */

complain_overflow_signed, /* complain_on_overflow */

coff_i860_reloc, /* special_function */

"DISP32", /* name */

TRUE, /* partial_inplace */

0xffffffff, /* src_mask */

0xffffffff, /* dst_mask */

PCRELOFFSET), /* pcrel_offset */

EMPTY_HOWTO (0x15),

EMPTY_HOWTO (0x16),

EMPTY_HOWTO (0x17),

EMPTY_HOWTO (0x18),

EMPTY_HOWTO (0x19),

EMPTY_HOWTO (0x1a),

EMPTY_HOWTO (0x1b),

HOWTO (COFF860_R_PAIR, /* type */

0, /* rightshift */

2, /* size (0 = byte, 1 = short, 2 = long) */

16, /* bitsize */

FALSE, /* pc_relative */

0, /* bitpos */

complain_overflow_dont, /* complain_on_overflow */

coff_i860_reloc_nyi, /* special_function */

"PAIR", /* name */

FALSE, /* partial_inplace */

0xffff, /* src_mask */

0xffff, /* dst_mask */

FALSE), /* pcrel_offset */

EMPTY_HOWTO (0x1d),

HOWTO (COFF860_R_HIGH, /* type */

16, /* rightshift */

2, /* size (0 = byte, 1 = short, 2 = long) */

16, /* bitsize */

FALSE, /* pc_relative */

0, /* bitpos */

complain_overflow_dont, /* complain_on_overflow */

coff_i860_reloc, /* special_function */

"HIGH", /* name */

FALSE, /* partial_inplace */

0xffff, /* src_mask */

0xffff, /* dst_mask */

FALSE), /* pcrel_offset */

HOWTO (COFF860_R_LOW0, /* type */

0, /* rightshift */

2, /* size (0 = byte, 1 = short, 2 = long) */

16, /* bitsize */

FALSE, /* pc_relative */

0, /* bitpos */

complain_overflow_dont, /* complain_on_overflow */

coff_i860_reloc, /* special_function */

"LOW0", /* name */

FALSE, /* partial_inplace */

0xffff, /* src_mask */

0xffff, /* dst_mask */

FALSE), /* pcrel_offset */

HOWTO (COFF860_R_LOW1, /* type */

0, /* rightshift */

2, /* size (0 = byte, 1 = short, 2 = long) */

16, /* bitsize */

FALSE, /* pc_relative */

0, /* bitpos */

complain_overflow_dont, /* complain_on_overflow */

coff_i860_reloc, /* special_function */

"LOW1", /* name */

FALSE, /* partial_inplace */

0xfffe, /* src_mask */

0xfffe, /* dst_mask */

FALSE), /* pcrel_offset */

HOWTO (COFF860_R_LOW2, /* type */

0, /* rightshift */

2, /* size (0 = byte, 1 = short, 2 = long) */

16, /* bitsize */

FALSE, /* pc_relative */

0, /* bitpos */

complain_overflow_dont, /* complain_on_overflow */

coff_i860_reloc, /* special_function */

"LOW2", /* name */

FALSE, /* partial_inplace */

0xfffc, /* src_mask */

0xfffc, /* dst_mask */

FALSE), /* pcrel_offset */

HOWTO (COFF860_R_LOW3, /* type */

0, /* rightshift */

2, /* size (0 = byte, 1 = short, 2 = long) */

16, /* bitsize */

FALSE, /* pc_relative */

0, /* bitpos */

complain_overflow_dont, /* complain_on_overflow */

coff_i860_reloc, /* special_function */

"LOW3", /* name */

FALSE, /* partial_inplace */

0xfff8, /* src_mask */

0xfff8, /* dst_mask */

FALSE), /* pcrel_offset */

HOWTO (COFF860_R_LOW4, /* type */

0, /* rightshift */

2, /* size (0 = byte, 1 = short, 2 = long) */

16, /* bitsize */

FALSE, /* pc_relative */

0, /* bitpos */

complain_overflow_dont, /* complain_on_overflow */

coff_i860_reloc, /* special_function */

"LOW4", /* name */

FALSE, /* partial_inplace */

0xfff0, /* src_mask */

0xfff0, /* dst_mask */

FALSE), /* pcrel_offset */

HOWTO (COFF860_R_SPLIT0, /* type */

0, /* rightshift */

2, /* size (0 = byte, 1 = short, 2 = long) */

16, /* bitsize */

FALSE, /* pc_relative */

0, /* bitpos */

complain_overflow_dont, /* complain_on_overflow */

coff_i860_reloc_nyi, /* special_function */

"SPLIT0", /* name */

FALSE, /* partial_inplace */

0x1f07ff, /* src_mask */

0x1f07ff, /* dst_mask */

FALSE), /* pcrel_offset */

HOWTO (COFF860_R_SPLIT1, /* type */

0, /* rightshift */

2, /* size (0 = byte, 1 = short, 2 = long) */

16, /* bitsize */

FALSE, /* pc_relative */

0, /* bitpos */

complain_overflow_dont, /* complain_on_overflow */

coff_i860_reloc_nyi, /* special_function */

"SPLIT1", /* name */

FALSE, /* partial_inplace */

0x1f07fe, /* src_mask */

0x1f07fe, /* dst_mask */

FALSE), /* pcrel_offset */

HOWTO (COFF860_R_SPLIT2, /* type */

0, /* rightshift */

2, /* size (0 = byte, 1 = short, 2 = long) */

16, /* bitsize */

FALSE, /* pc_relative */

0, /* bitpos */

complain_overflow_dont, /* complain_on_overflow */

coff_i860_reloc_nyi, /* special_function */

"SPLIT2", /* name */

FALSE, /* partial_inplace */

0x1f07fc, /* src_mask */

0x1f07fc, /* dst_mask */

FALSE), /* pcrel_offset */

HOWTO (COFF860_R_HIGHADJ, /* type */

0, /* rightshift */

2, /* size (0 = byte, 1 = short, 2 = long) */

16, /* bitsize */

FALSE, /* pc_relative */

0, /* bitpos */

complain_overflow_dont, /* complain_on_overflow */

coff_i860_reloc_nyi, /* special_function */

"HIGHADJ", /* name */

FALSE, /* partial_inplace */

0xffff, /* src_mask */

0xffff, /* dst_mask */

FALSE), /* pcrel_offset */

HOWTO (COFF860_R_BRADDR, /* type */

2, /* rightshift */

2, /* size (0 = byte, 1 = short, 2 = long) */

26, /* bitsize */

TRUE, /* pc_relative */

0, /* bitpos */

complain_overflow_bitfield, /* complain_on_overflow */

coff_i860_reloc_nyi, /* special_function */

"BRADDR", /* name */

FALSE, /* partial_inplace */

0x3ffffff, /* src_mask */

0x3ffffff, /* dst_mask */

TRUE) /* pcrel_offset */

};

/* Turn a howto into a reloc number. */

#define SELECT_RELOC(x,howto) { x.r_type = howto->type; }

#define BADMAG(x) I860BADMAG(x)

#define I860 1 /* Customize coffcode.h */

#define RTYPE2HOWTO(cache_ptr, dst) \

((cache_ptr)->howto = \

((dst)->r_type < sizeof (howto_table) / sizeof (howto_table[0]) \

? howto_table + (dst)->r_type \

: NULL))

/* For 860 COFF a STYP_NOLOAD | STYP_BSS section is part of a shared

library. On some other COFF targets STYP_BSS is normally

STYP_NOLOAD. */

#define BSS_NOLOAD_IS_SHARED_LIBRARY

/* Compute the addend of a reloc. If the reloc is to a common symbol,

the object file contains the value of the common symbol. By the

time this is called, the linker may be using a different symbol

from a different object file with a different value. Therefore, we

hack wildly to locate the original symbol from this file so that we

can make the correct adjustment. This macro sets coffsym to the

symbol from the original file, and uses it to set the addend value

correctly. If this is not a common symbol, the usual addend

calculation is done, except that an additional tweak is needed for

PC relative relocs.

FIXME: This macro refers to symbols and asect; these are from the

calling function, not the macro arguments. */

/* PR 17512: file: 0a38fb7c

Set an addend value, even if it is not going to be used. A tool

like coffdump might be used to print out the contents of the reloc. */

#define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) (cache_ptr)->addend = 0

/* We use the special COFF backend linker. */

#define coff_relocate_section _bfd_coff_generic_relocate_section

static reloc_howto_type *

coff_i860_rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED,

bfd_vma *addendp)

{

reloc_howto_type *howto;

if (rel->r_type > sizeof (howto_table) / sizeof (howto_table[0]))

{

bfd_set_error (bfd_error_bad_value);

return NULL;

}

howto = howto_table + rel->r_type;

if (howto->pc_relative)

*addendp += sec->vma;

if (sym != NULL && sym->n_scnum == 0 && sym->n_value != 0)

{

/* This is a common symbol. The section contents include the

size (sym->n_value) as an addend. The relocate_section

function will be adding in the final value of the symbol. We

need to subtract out the current size in order to get the

correct result. */

BFD_ASSERT (h != NULL);

/* I think we *do* want to bypass this. If we don't, I have seen some data

parameters get the wrong relocation address. If I link two versions

with and without this section bypassed and then do a binary comparison,

the addresses which are different can be looked up in the map. The

case in which this section has been bypassed has addresses which correspond

to values I can find in the map. */

*addendp -= sym->n_value;

}

/* If the output symbol is common (in which case this must be a

relocatable link), we need to add in the final size of the

common symbol. */

if (h != NULL && h->root.type == bfd_link_hash_common)

*addendp += h->root.u.c.size;

return howto;

}

static reloc_howto_type *

coff_i860_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,

bfd_reloc_code_real_type code)

{

switch (code)

{

case BFD_RELOC_32:

return howto_table + R_DIR32;

case BFD_RELOC_860_PC26:

return howto_table + COFF860_R_BRADDR;

case BFD_RELOC_860_PC16:

/* ??? How to handle PC16 for COFF? SPLIT0 is close for now. */

return howto_table + COFF860_R_SPLIT0;

case BFD_RELOC_860_LOW0:

return howto_table + COFF860_R_LOW0;

case BFD_RELOC_860_SPLIT0:

return howto_table + COFF860_R_SPLIT0;

case BFD_RELOC_860_LOW1:

return howto_table + COFF860_R_LOW1;

case BFD_RELOC_860_SPLIT1:

return howto_table + COFF860_R_SPLIT1;

case BFD_RELOC_860_LOW2:

return howto_table + COFF860_R_LOW2;

case BFD_RELOC_860_SPLIT2:

return howto_table + COFF860_R_SPLIT2;

case BFD_RELOC_860_LOW3:

return howto_table + COFF860_R_LOW3;

case BFD_RELOC_860_HIGHADJ:

return howto_table + COFF860_R_HIGHADJ;

case BFD_RELOC_860_HIGH:

return howto_table + COFF860_R_HIGH;

default:

BFD_FAIL ();

return 0;

}

}

static reloc_howto_type *

coff_i860_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,

const char *r_name)

{

unsigned int i;

for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++)

if (howto_table[i].name != NULL

&& strcasecmp (howto_table[i].name, r_name) == 0)

return &howto_table[i];

return NULL;

}

/* This is called from coff_slurp_reloc_table for each relocation

entry. This special handling is due to the `PAIR' relocation

which has a different meaning for the `r_symndx' field. */

static void

i860_reloc_processing (arelent *cache_ptr, struct internal_reloc *dst,

asymbol **symbols, bfd *abfd, asection *asect)

{

if (dst->r_type == COFF860_R_PAIR)

{

/* Handle the PAIR relocation specially. */

cache_ptr->howto = howto_table + dst->r_type;

cache_ptr->address = dst->r_vaddr;

cache_ptr->addend = dst->r_symndx;

cache_ptr->sym_ptr_ptr= bfd_abs_section_ptr->symbol_ptr_ptr;

}

else

{

/* For every other relocation, do exactly what coff_slurp_reloc_table

would do (which this code is taken directly from). */

asymbol *ptr = NULL;

cache_ptr->address = dst->r_vaddr;

if (dst->r_symndx != -1)

{

if (dst->r_symndx < 0 || dst->r_symndx >= obj_conv_table_size (abfd))

{

_bfd_error_handler

/* xgettext: c-format */

(_("%B: warning: illegal symbol index %ld in relocs"),

abfd, dst->r_symndx);

cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;

ptr = NULL;

}

else

{

cache_ptr->sym_ptr_ptr = (symbols

+ obj_convert (abfd)[dst->r_symndx]);

ptr = *(cache_ptr->sym_ptr_ptr);

}

}

else

{

cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;

ptr = NULL;

}

/* The symbols definitions that we have read in have been

relocated as if their sections started at 0. But the offsets

refering to the symbols in the raw data have not been

modified, so we have to have a negative addend to compensate.

Note that symbols which used to be common must be left alone. */

/* Calculate any reloc addend by looking at the symbol. */

CALC_ADDEND (abfd, ptr, (*dst), cache_ptr);

(void) ptr;

cache_ptr->address -= asect->vma;

/* Fill in the cache_ptr->howto field from dst->r_type. */

RTYPE2HOWTO (cache_ptr, dst);

}

}



#define coff_rtype_to_howto coff_i860_rtype_to_howto

#define coff_bfd_reloc_type_lookup coff_i860_reloc_type_lookup

#define coff_bfd_reloc_name_lookup coff_i860_reloc_name_lookup

#define RELOC_PROCESSING(relent, reloc, symbols, abfd, section) \

i860_reloc_processing (relent, reloc, symbols, abfd, section)

#include "coffcode.h"

static const bfd_target *

i3coff_object_p(bfd *a)

{

return coff_object_p (a);

}

const bfd_target

#ifdef TARGET_SYM

TARGET_SYM =

#else

i860_coff_vec =

#endif

{

#ifdef TARGET_NAME

TARGET_NAME,

#else

"coff-i860", /* name */

#endif

bfd_target_coff_flavour,

BFD_ENDIAN_LITTLE, /* data byte order is little */

BFD_ENDIAN_LITTLE, /* header byte order is little */

(HAS_RELOC | EXEC_P | /* object flags */

HAS_LINENO | HAS_DEBUG |

HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),

(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */

'_', /* leading underscore */

'/', /* ar_pad_char */

15, /* ar_max_namelen */

0, /* match priority. */

bfd_getl64, bfd_getl_signed_64, bfd_putl64,

bfd_getl32, bfd_getl_signed_32, bfd_putl32,

bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */

bfd_getl64, bfd_getl_signed_64, bfd_putl64,

bfd_getl32, bfd_getl_signed_32, bfd_putl32,

bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */

/* Note that we allow an object file to be treated as a core file as well. */

{_bfd_dummy_target, i3coff_object_p, /* bfd_check_format */

bfd_generic_archive_p, i3coff_object_p},

{bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */

bfd_false},

{bfd_false, coff_write_object_contents, /* bfd_write_contents */

_bfd_write_archive_contents, bfd_false},

BFD_JUMP_TABLE_GENERIC (coff),

BFD_JUMP_TABLE_COPY (coff),

BFD_JUMP_TABLE_CORE (_bfd_nocore),

BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),

BFD_JUMP_TABLE_SYMBOLS (coff),

BFD_JUMP_TABLE_RELOCS (coff),

BFD_JUMP_TABLE_WRITE (coff),

BFD_JUMP_TABLE_LINK (coff),

BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),

NULL,

COFF_SWAP_TABLE

};