Retro68/binutils/bfd/coff-tic80.c

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/* BFD back-end for Texas Instruments TMS320C80 Multimedia Video Processor (MVP).
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Copyright (C) 1996-2018 Free Software Foundation, Inc.
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Written by Fred Fish (fnf@cygnus.com)
There is nothing new under the sun. This file draws a lot on other
coff files.
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, 51 Franklin Street - Fifth Floor,
Boston, MA 02110-1301, USA. */
#include "sysdep.h"
#include "bfd.h"
#include "bfdlink.h"
#include "libbfd.h"
#ifdef _CONST
/* Newlib-based hosts define _CONST as a STDC-safe alias for const,
but to the tic80 toolchain it means something altogether different.
Since sysdep.h will have pulled in stdio.h and hence _ansi.h which
contains this definition, we must undef it before including the
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tic80-specific definition. */
#undef _CONST
#endif /* _CONST */
#include "coff/tic80.h"
#include "coff/internal.h"
#include "libcoff.h"
#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2)
#define COFF_ALIGN_IN_SECTION_HEADER 1
#define COFF_ALIGN_IN_SFLAGS 1
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#define COFF_ENCODE_ALIGNMENT(S,X) ((S).s_flags |= (((unsigned)(X) & 0xf) << 8))
#define COFF_DECODE_ALIGNMENT(X) (((X) >> 8) & 0xf)
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#define GET_SCNHDR_FLAGS H_GET_16
#define PUT_SCNHDR_FLAGS H_PUT_16
static bfd_reloc_status_type ppbase_reloc
(bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
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static bfd_reloc_status_type glob15_reloc
(bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
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static bfd_reloc_status_type glob16_reloc
(bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
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static bfd_reloc_status_type local16_reloc
(bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
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static reloc_howto_type tic80_howto_table[] =
{
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 */
NULL, /* special_function */
"RELLONG", /* name */
TRUE, /* partial_inplace */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
FALSE), /* pcrel_offset */
HOWTO (R_MPPCR, /* type */
2, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
TRUE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
NULL, /* special_function */
"MPPCR", /* name */
TRUE, /* partial_inplace */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
TRUE), /* pcrel_offset */
HOWTO (R_ABS, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
NULL, /* special_function */
"ABS", /* name */
TRUE, /* partial_inplace */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
FALSE), /* pcrel_offset */
HOWTO (R_PPBASE, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
ppbase_reloc, /* special_function */
"PPBASE", /* name */
TRUE, /* partial_inplace */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
FALSE), /* pcrel_offset */
HOWTO (R_PPLBASE, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
ppbase_reloc, /* special_function */
"PPLBASE", /* name */
TRUE, /* partial_inplace */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
FALSE), /* pcrel_offset */
HOWTO (R_PP15, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
15, /* bitsize */
FALSE, /* pc_relative */
6, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
glob15_reloc, /* special_function */
"PP15", /* name */
TRUE, /* partial_inplace */
0x1ffc0, /* src_mask */
0x1ffc0, /* dst_mask */
FALSE), /* pcrel_offset */
HOWTO (R_PP15W, /* type */
2, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
15, /* bitsize */
FALSE, /* pc_relative */
6, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
glob15_reloc, /* special_function */
"PP15W", /* name */
TRUE, /* partial_inplace */
0x1ffc0, /* src_mask */
0x1ffc0, /* dst_mask */
FALSE), /* pcrel_offset */
HOWTO (R_PP15H, /* type */
1, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
15, /* bitsize */
FALSE, /* pc_relative */
6, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
glob15_reloc, /* special_function */
"PP15H", /* name */
TRUE, /* partial_inplace */
0x1ffc0, /* src_mask */
0x1ffc0, /* dst_mask */
FALSE), /* pcrel_offset */
HOWTO (R_PP16B, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
FALSE, /* pc_relative */
6, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
glob16_reloc, /* special_function */
"PP16B", /* name */
TRUE, /* partial_inplace */
0x3ffc0, /* src_mask */
0x3ffc0, /* dst_mask */
FALSE), /* pcrel_offset */
HOWTO (R_PPL15, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
15, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
NULL, /* special_function */
"PPL15", /* name */
TRUE, /* partial_inplace */
0x7fff, /* src_mask */
0x7fff, /* dst_mask */
FALSE), /* pcrel_offset */
HOWTO (R_PPL15W, /* type */
2, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
15, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
NULL, /* special_function */
"PPL15W", /* name */
TRUE, /* partial_inplace */
0x7fff, /* src_mask */
0x7fff, /* dst_mask */
FALSE), /* pcrel_offset */
HOWTO (R_PPL15H, /* type */
1, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
15, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
NULL, /* special_function */
"PPL15H", /* name */
TRUE, /* partial_inplace */
0x7fff, /* src_mask */
0x7fff, /* dst_mask */
FALSE), /* pcrel_offset */
HOWTO (R_PPL16B, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
local16_reloc, /* special_function */
"PPL16B", /* name */
TRUE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
FALSE), /* pcrel_offset */
HOWTO (R_PPN15, /* type */
0, /* rightshift */
-2, /* size (0 = byte, 1 = short, 2 = long) */
15, /* bitsize */
FALSE, /* pc_relative */
6, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
glob15_reloc, /* special_function */
"PPN15", /* name */
TRUE, /* partial_inplace */
0x1ffc0, /* src_mask */
0x1ffc0, /* dst_mask */
FALSE), /* pcrel_offset */
HOWTO (R_PPN15W, /* type */
2, /* rightshift */
-2, /* size (0 = byte, 1 = short, 2 = long) */
15, /* bitsize */
FALSE, /* pc_relative */
6, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
glob15_reloc, /* special_function */
"PPN15W", /* name */
TRUE, /* partial_inplace */
0x1ffc0, /* src_mask */
0x1ffc0, /* dst_mask */
FALSE), /* pcrel_offset */
HOWTO (R_PPN15H, /* type */
1, /* rightshift */
-2, /* size (0 = byte, 1 = short, 2 = long) */
15, /* bitsize */
FALSE, /* pc_relative */
6, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
glob15_reloc, /* special_function */
"PPN15H", /* name */
TRUE, /* partial_inplace */
0x1ffc0, /* src_mask */
0x1ffc0, /* dst_mask */
FALSE), /* pcrel_offset */
HOWTO (R_PPN16B, /* type */
0, /* rightshift */
-2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
FALSE, /* pc_relative */
6, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
glob16_reloc, /* special_function */
"PPN16B", /* name */
TRUE, /* partial_inplace */
0x3ffc0, /* src_mask */
0x3ffc0, /* dst_mask */
FALSE), /* pcrel_offset */
HOWTO (R_PPLN15, /* type */
0, /* rightshift */
-2, /* size (0 = byte, 1 = short, 2 = long) */
15, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
NULL, /* special_function */
"PPLN15", /* name */
TRUE, /* partial_inplace */
0x7fff, /* src_mask */
0x7fff, /* dst_mask */
FALSE), /* pcrel_offset */
HOWTO (R_PPLN15W, /* type */
2, /* rightshift */
-2, /* size (0 = byte, 1 = short, 2 = long) */
15, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
NULL, /* special_function */
"PPLN15W", /* name */
TRUE, /* partial_inplace */
0x7fff, /* src_mask */
0x7fff, /* dst_mask */
FALSE), /* pcrel_offset */
HOWTO (R_PPLN15H, /* type */
1, /* rightshift */
-2, /* size (0 = byte, 1 = short, 2 = long) */
15, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
NULL, /* special_function */
"PPLN15H", /* name */
TRUE, /* partial_inplace */
0x7fff, /* src_mask */
0x7fff, /* dst_mask */
FALSE), /* pcrel_offset */
HOWTO (R_PPLN16B, /* type */
0, /* rightshift */
-2, /* size (0 = byte, 1 = short, 2 = long) */
15, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
local16_reloc, /* special_function */
"PPLN16B", /* name */
TRUE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
FALSE) /* pcrel_offset */
};
/* Special relocation functions, used when the output file is not
itself a COFF TIc80 file. */
/* This special function is used for the base address type
relocations. */
static bfd_reloc_status_type
ppbase_reloc (bfd *abfd ATTRIBUTE_UNUSED,
arelent *reloc_entry ATTRIBUTE_UNUSED,
asymbol *symbol_in ATTRIBUTE_UNUSED,
void * data ATTRIBUTE_UNUSED,
asection *input_section ATTRIBUTE_UNUSED,
bfd *output_bfd ATTRIBUTE_UNUSED,
char **error_message ATTRIBUTE_UNUSED)
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{
/* FIXME. */
abort ();
}
/* This special function is used for the global 15 bit relocations. */
static bfd_reloc_status_type
glob15_reloc (bfd *abfd ATTRIBUTE_UNUSED,
arelent *reloc_entry ATTRIBUTE_UNUSED,
asymbol *symbol_in ATTRIBUTE_UNUSED,
void * data ATTRIBUTE_UNUSED,
asection *input_section ATTRIBUTE_UNUSED,
bfd *output_bfd ATTRIBUTE_UNUSED,
char **error_message ATTRIBUTE_UNUSED)
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{
/* FIXME. */
abort ();
}
/* This special function is used for the global 16 bit relocations. */
static bfd_reloc_status_type
glob16_reloc (bfd *abfd ATTRIBUTE_UNUSED,
arelent *reloc_entry ATTRIBUTE_UNUSED,
asymbol *symbol_in ATTRIBUTE_UNUSED,
void * data ATTRIBUTE_UNUSED,
asection *input_section ATTRIBUTE_UNUSED,
bfd *output_bfd ATTRIBUTE_UNUSED,
char **error_message ATTRIBUTE_UNUSED)
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{
/* FIXME. */
abort ();
}
/* This special function is used for the local 16 bit relocations. */
static bfd_reloc_status_type
local16_reloc (bfd *abfd ATTRIBUTE_UNUSED,
arelent *reloc_entry ATTRIBUTE_UNUSED,
asymbol *symbol_in ATTRIBUTE_UNUSED,
void * data ATTRIBUTE_UNUSED,
asection *input_section ATTRIBUTE_UNUSED,
bfd *output_bfd ATTRIBUTE_UNUSED,
char **error_message ATTRIBUTE_UNUSED)
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{
/* FIXME. */
abort ();
}
/* Code to turn an external r_type into a pointer to an entry in the howto_table.
If passed an r_type we don't recognize the abort rather than silently failing
to generate an output file. */
static void
rtype2howto (arelent *cache_ptr, struct internal_reloc *dst)
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{
unsigned int i;
for (i = 0; i < sizeof tic80_howto_table / sizeof tic80_howto_table[0]; i++)
{
if (tic80_howto_table[i].type == dst->r_type)
{
cache_ptr->howto = tic80_howto_table + i;
return;
}
}
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_bfd_error_handler (_("unsupported relocation type %#x"),
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(unsigned int) dst->r_type);
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cache_ptr->howto = tic80_howto_table + 0;
}
#define RTYPE2HOWTO(cache_ptr, dst) rtype2howto (cache_ptr, dst)
#define coff_rtype_to_howto coff_tic80_rtype_to_howto
static reloc_howto_type *
coff_tic80_rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
asection *sec,
struct internal_reloc *rel,
struct coff_link_hash_entry *h ATTRIBUTE_UNUSED,
struct internal_syment *sym ATTRIBUTE_UNUSED,
bfd_vma *addendp)
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{
arelent genrel;
if (rel -> r_symndx == -1 && addendp != NULL)
{
/* This is a TI "internal relocation", which means that the relocation
amount is the amount by which the current section is being relocated
in the output section. */
*addendp = (sec -> output_section -> vma + sec -> output_offset) - sec -> vma;
}
RTYPE2HOWTO (&genrel, rel);
return genrel.howto;
}
#ifndef BADMAG
#define BADMAG(x) TIC80BADMAG(x)
#endif
#define coff_relocate_section coff_tic80_relocate_section
/* We need a special relocation routine to handle the PP relocs. Most
of this is a copy of _bfd_coff_generic_relocate_section. */
static bfd_boolean
coff_tic80_relocate_section (bfd *output_bfd,
struct bfd_link_info *info,
bfd *input_bfd,
asection *input_section,
bfd_byte *contents,
struct internal_reloc *relocs,
struct internal_syment *syms,
asection **sections)
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{
struct internal_reloc *rel;
struct internal_reloc *relend;
rel = relocs;
relend = rel + input_section->reloc_count;
for (; rel < relend; rel++)
{
long symndx;
struct coff_link_hash_entry *h;
struct internal_syment *sym;
bfd_vma addend;
bfd_vma val;
reloc_howto_type *howto;
bfd_reloc_status_type rstat;
bfd_vma addr;
symndx = rel->r_symndx;
if (symndx == -1)
{
h = NULL;
sym = NULL;
}
else
{
h = obj_coff_sym_hashes (input_bfd)[symndx];
sym = syms + symndx;
}
/* COFF treats common symbols in one of two ways. Either the
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size of the symbol is included in the section contents, or it
is not. We assume that the size is not included, and force
the rtype_to_howto function to adjust the addend as needed. */
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if (sym != NULL && sym->n_scnum != 0)
addend = - sym->n_value;
else
addend = 0;
howto = bfd_coff_rtype_to_howto (input_bfd, input_section, rel, h,
sym, &addend);
if (howto == NULL)
return FALSE;
val = 0;
if (h == NULL)
{
asection *sec;
if (symndx == -1)
{
sec = bfd_abs_section_ptr;
val = 0;
}
else
{
sec = sections[symndx];
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val = (sec->output_section->vma
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+ sec->output_offset
+ sym->n_value);
if (! obj_pe (output_bfd))
val -= sec->vma;
}
}
else
{
if (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
{
asection *sec;
sec = h->root.u.def.section;
val = (h->root.u.def.value
+ sec->output_section->vma
+ sec->output_offset);
}
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else if (! bfd_link_relocatable (info))
(*info->callbacks->undefined_symbol)
(info, h->root.root.string, input_bfd, input_section,
rel->r_vaddr - input_section->vma, TRUE);
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}
addr = rel->r_vaddr - input_section->vma;
/* FIXME: This code assumes little endian, but the PP can
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apparently be bi-endian. I don't know if the bi-endianness
applies to the instruction set or just to the data. */
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switch (howto->type)
{
default:
case R_ABS:
case R_RELLONGX:
case R_PPL15:
case R_PPL15W:
case R_PPL15H:
case R_PPLN15:
case R_PPLN15W:
case R_PPLN15H:
rstat = _bfd_final_link_relocate (howto, input_bfd, input_section,
contents, addr, val, addend);
break;
case R_PP15:
case R_PP15W:
case R_PP15H:
case R_PPN15:
case R_PPN15W:
case R_PPN15H:
/* Offset the address so that we can use 4 byte relocations. */
rstat = _bfd_final_link_relocate (howto, input_bfd, input_section,
contents + 2, addr, val, addend);
break;
case R_PP16B:
case R_PPN16B:
{
/* The most significant bit is stored in bit 6. */
bfd_byte hold;
hold = contents[addr + 4];
contents[addr + 4] &=~ 0x20;
contents[addr + 4] |= (contents[addr] >> 1) & 0x20;
rstat = _bfd_final_link_relocate (howto, input_bfd, input_section,
contents + 2, addr,
val, addend);
contents[addr] &=~ 0x40;
contents[addr] |= (contents[addr + 4] << 1) & 0x40;
contents[addr + 4] &=~ 0x20;
contents[addr + 4] |= hold & 0x20;
break;
}
case R_PPL16B:
case R_PPLN16B:
{
/* The most significant bit is stored in bit 28. */
bfd_byte hold;
hold = contents[addr + 1];
contents[addr + 1] &=~ 0x80;
contents[addr + 1] |= (contents[addr + 3] << 3) & 0x80;
rstat = _bfd_final_link_relocate (howto, input_bfd, input_section,
contents, addr,
val, addend);
contents[addr + 3] &= ~0x10;
contents[addr + 3] |= (contents[addr + 1] >> 3) & 0x10;
contents[addr + 1] &=~ 0x80;
contents[addr + 1] |= hold & 0x80;
break;
}
case R_PPBASE:
/* Parameter RAM is from 0x1000000 to 0x1000800. */
contents[addr] &=~ 0x3;
if (val >= 0x1000000 && val < 0x1000800)
contents[addr] |= 0x3;
else
contents[addr] |= 0x2;
rstat = bfd_reloc_ok;
break;
case R_PPLBASE:
/* Parameter RAM is from 0x1000000 to 0x1000800. */
contents[addr + 2] &= ~0xc0;
if (val >= 0x1000000 && val < 0x1000800)
contents[addr + 2] |= 0xc0;
else
contents[addr + 2] |= 0x80;
rstat = bfd_reloc_ok;
break;
}
switch (rstat)
{
default:
abort ();
case bfd_reloc_ok:
break;
case bfd_reloc_outofrange:
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_bfd_error_handler
/* xgettext: c-format */
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(_("%pB: bad reloc address %#" PRIx64 " in section `%pA'"),
input_bfd, (uint64_t) rel->r_vaddr, input_section);
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return FALSE;
case bfd_reloc_overflow:
{
const char *name;
char buf[SYMNMLEN + 1];
if (symndx == -1)
name = "*ABS*";
else if (h != NULL)
name = NULL;
else
{
name = _bfd_coff_internal_syment_name (input_bfd, sym, buf);
if (name == NULL)
return FALSE;
}
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(*info->callbacks->reloc_overflow)
(info, (h ? &h->root : NULL), name, howto->name,
(bfd_vma) 0, input_bfd, input_section,
rel->r_vaddr - input_section->vma);
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}
}
}
return TRUE;
}
#define TIC80COFF 1 /* Customize coffcode.h */
#undef C_AUTOARG /* Clashes with TIc80's C_UEXT */
#undef C_LASTENT /* Clashes with TIc80's C_STATLAB */
#ifndef bfd_pe_print_pdata
#define bfd_pe_print_pdata NULL
#endif
#include "coffcode.h"
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CREATE_LITTLE_COFF_TARGET_VEC (tic80_coff_vec, "coff-tic80", D_PAGED, 0, '_', NULL, COFF_SWAP_TABLE)