[deliverable/binutils-gdb.git] / bfd / coff-m88k.c

/* BFD back-end for Motorola 88000 COFF "Binary Compatibility Standard" files.
   Copyright (C) 1990-2017 Free Software Foundation, Inc.
   Written by Cygnus Support.

   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.  */

#define M88 1		/* Customize various include files */
#include "sysdep.h"
#include "bfd.h"
#include "libbfd.h"
#include "coff/m88k.h"
#include "coff/internal.h"
#include "libcoff.h"

static bfd_reloc_status_type m88k_special_reloc
  (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);

#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (3)

#define GET_SCNHDR_NRELOC H_GET_32
#define GET_SCNHDR_NLNNO  H_GET_32

/* On coff-m88k, local labels start with '@'.  */

#define coff_bfd_is_local_label_name m88k_is_local_label_name

static bfd_boolean
m88k_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, const char *name)
{
  return name[0] == '@';
}

static bfd_reloc_status_type
m88k_special_reloc (bfd *abfd,
		    arelent *reloc_entry,
		    asymbol *symbol,
		    void * data,
		    asection *input_section,
		    bfd *output_bfd,
		    char **error_message ATTRIBUTE_UNUSED)
{
  reloc_howto_type *howto = reloc_entry->howto;

  switch (howto->type)
    {
    case R_HVRT16:
    case R_LVRT16:
      if (output_bfd != (bfd *) NULL)
	{
	  /* This is a partial relocation, and we want to apply the
	     relocation to the reloc entry rather than the raw data.
	     Modify the reloc inplace to reflect what we now know.  */

	  reloc_entry->address += input_section->output_offset;
	}
      else
	{
	  bfd_vma output_base = 0;
	  bfd_vma addr = reloc_entry->address;
	  bfd_vma x = bfd_get_16 (abfd, (bfd_byte *) data + addr);
	  asection *reloc_target_output_section;
	  long relocation = 0;

	  /* Work out which section the relocation is targeted at and the
	     initial relocation command value.  */

	  /* Get symbol value.  (Common symbols are special.)  */
	  if (bfd_is_com_section (symbol->section))
	    relocation = 0;
	  else
	    relocation = symbol->value;

	  reloc_target_output_section = symbol->section->output_section;

	  /* Convert input-section-relative symbol value to absolute.  */
	  if (output_bfd)
	    output_base = 0;
	  else
	    output_base = reloc_target_output_section->vma;

	  relocation += output_base + symbol->section->output_offset;

	  /* Add in supplied addend.  */
	  relocation += ((reloc_entry->addend << howto->bitsize) + x);

	  reloc_entry->addend = 0;

	  relocation >>= (bfd_vma) howto->rightshift;

	  /* Shift everything up to where it's going to be used */

	  relocation <<= (bfd_vma) howto->bitpos;

	  if (relocation)
	    bfd_put_16 (abfd, (bfd_vma) relocation,
			(unsigned char *) data + addr);
	}

      /* If we are not producing relocatable output, return an error if
	 the symbol is not defined.  */
      if (bfd_is_und_section (symbol->section) && output_bfd == (bfd *) NULL)
	return bfd_reloc_undefined;

      return bfd_reloc_ok;

    default:
      if (output_bfd != (bfd *) NULL)
	{
	  /* This is a partial relocation, and we want to apply the
	     relocation to the reloc entry rather than the raw data.
	     Modify the reloc inplace to reflect what we now know.  */

	  reloc_entry->address += input_section->output_offset;
	  return bfd_reloc_ok;
	}
      break;
    }

  if (output_bfd == (bfd *) NULL)
    return bfd_reloc_continue;

  return bfd_reloc_ok;
}

static reloc_howto_type howto_table[] =
{
  HOWTO (R_PCR16L,			/* type */
	 02,				/* rightshift */
	 1,				/* size (0 = byte, 1 = short, 2 = long) */
	 16,				/* bitsize */
	 TRUE,				/* pc_relative */
	 0,				/* bitpos */
	 complain_overflow_signed,	/* complain_on_overflow */
	 m88k_special_reloc,		/* special_function */
	 "PCR16L",			/* name */
	 FALSE,				/* partial_inplace */
	 0x0000ffff,			/* src_mask */
	 0x0000ffff,			/* dst_mask */
	 TRUE),				/* pcrel_offset */

  HOWTO (R_PCR26L,			/* type */
	 02,				/* rightshift */
	 2,				/* size (0 = byte, 1 = short, 2 = long) */
	 26,				/* bitsize */
	 TRUE,				/* pc_relative */
	 0,				/* bitpos */
	 complain_overflow_signed,	/* complain_on_overflow */
	 m88k_special_reloc,		/* special_function */
	 "PCR26L",			/* name */
	 FALSE,				/* partial_inplace */
	 0x03ffffff,			/* src_mask */
	 0x03ffffff,			/* dst_mask */
	 TRUE),				/* pcrel_offset */

  HOWTO (R_VRT16,			/* type */
	 00,				/* rightshift */
	 1,				/* size (0 = byte, 1 = short, 2 = long) */
	 16,				/* bitsize */
	 FALSE,				/* pc_relative */
	 0,				/* bitpos */
	 complain_overflow_bitfield,	/* complain_on_overflow */
	 m88k_special_reloc,		/* special_function */
	 "VRT16",			/* name */
	 FALSE,				/* partial_inplace */
	 0x0000ffff,			/* src_mask */
	 0x0000ffff,			/* dst_mask */
	 TRUE),				/* pcrel_offset */

  HOWTO (R_HVRT16,			/* type */
	 16,				/* rightshift */
	 1,				/* size (0 = byte, 1 = short, 2 = long) */
	 16,				/* bitsize */
	 FALSE,				/* pc_relative */
	 0,				/* bitpos */
	 complain_overflow_dont,	/* complain_on_overflow */
	 m88k_special_reloc,		/* special_function */
	 "HVRT16",			/* name */
	 FALSE,				/* partial_inplace */
	 0x0000ffff,			/* src_mask */
	 0x0000ffff,			/* dst_mask */
	 TRUE),				/* pcrel_offset */

  HOWTO (R_LVRT16,			/* type */
	 00,				/* rightshift */
	 1,				/* size (0 = byte, 1 = short, 2 = long) */
	 16,				/* bitsize */
	 FALSE,				/* pc_relative */
	 0,				/* bitpos */
	 complain_overflow_dont,	/* complain_on_overflow */
	 m88k_special_reloc,		/* special_function */
	 "LVRT16",			/* name */
	 FALSE,				/* partial_inplace */
	 0x0000ffff,			/* src_mask */
	 0x0000ffff,			/* dst_mask */
	 TRUE),				/* pcrel_offset */

  HOWTO (R_VRT32,			/* type */
	 00,				/* rightshift */
	 2,				/* size (0 = byte, 1 = short, 2 = long) */
	 32,				/* bitsize */
	 FALSE,				/* pc_relative */
	 0,				/* bitpos */
	 complain_overflow_bitfield,	/* complain_on_overflow */
	 m88k_special_reloc,		/* special_function */
	 "VRT32",			/* name */
	 FALSE,				/* partial_inplace */
	 0xffffffff,			/* src_mask */
	 0xffffffff,			/* dst_mask */
	 TRUE),				/* pcrel_offset */
};

/* Code to turn an external r_type into a pointer to an entry in the
   above howto table.  */
static void
rtype2howto (arelent *cache_ptr, struct internal_reloc *dst)
{
  if (dst->r_type >= R_PCR16L && dst->r_type <= R_VRT32)
    {
      cache_ptr->howto = howto_table + dst->r_type - R_PCR16L;
    }
  else
    {
      BFD_ASSERT (0);
    }
}

#define RTYPE2HOWTO(cache_ptr, dst) rtype2howto (cache_ptr, dst)

/* Code to swap in the reloc offset */
#define SWAP_IN_RELOC_OFFSET  H_GET_16
#define SWAP_OUT_RELOC_OFFSET H_PUT_16

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

static void
reloc_processing (arelent *relent,
		  struct internal_reloc *reloc,
		  asymbol **symbols,
		  bfd *abfd,
		  asection *section)
{
  relent->address = reloc->r_vaddr;
  rtype2howto (relent, reloc);

  if (((int) reloc->r_symndx) > 0)
    {
      relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx];
    }
  else
    {
      relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
    }

  relent->addend = reloc->r_offset;
  relent->address -= section->vma;
}

#define BADMAG(x) MC88BADMAG(x)

#ifndef bfd_pe_print_pdata
#define bfd_pe_print_pdata	NULL
#endif

#include "coffcode.h"

#undef coff_write_armap

CREATE_BIG_COFF_TARGET_VEC (m88k_coff_bcs_vec, "coff-m88kbcs", 0, 0, '_', NULL, COFF_SWAP_TABLE)
Commit	Line	Data
5c4491d3	1	/* BFD back-end for Motorola 88000 COFF "Binary Compatibility Standard" files.
2571583a	2	Copyright (C) 1990-2017 Free Software Foundation, Inc.
252b5132 RH	3	Written by Cygnus Support.
252b5132 RH	4
cd123cb7	5	This file is part of BFD, the Binary File Descriptor library.
252b5132	6
cd123cb7 NC	7	This program is free software; you can redistribute it and/or modify
	8	it under the terms of the GNU General Public License as published by
	9	the Free Software Foundation; either version 3 of the License, or
	10	(at your option) any later version.
252b5132	11
cd123cb7 NC	12	This program is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
252b5132	16
cd123cb7 NC	17	You should have received a copy of the GNU General Public License
	18	along with this program; if not, write to the Free Software
	19	Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
	20	MA 02110-1301, USA. */
252b5132 RH	21
252b5132 RH	22	#define M88 1 /* Customize various include files */
252b5132	23	#include "sysdep.h"
3db64b00	24	#include "bfd.h"
252b5132 RH	25	#include "libbfd.h"
	26	#include "coff/m88k.h"
	27	#include "coff/internal.h"
	28	#include "libcoff.h"
	29
252b5132	30	static bfd_reloc_status_type m88k_special_reloc
2c3fc389	31	(bfd , arelent , asymbol , void , asection , bfd , char **);
252b5132 RH	32
	33	#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (3)
	34
dc810e39 AM	35	#define GET_SCNHDR_NRELOC H_GET_32
dc810e39 AM	36	#define GET_SCNHDR_NLNNO H_GET_32
252b5132 RH	37
	38	/* On coff-m88k, local labels start with '@'. */
	39
	40	#define coff_bfd_is_local_label_name m88k_is_local_label_name
	41
b34976b6	42	static bfd_boolean
2c3fc389	43	m88k_is_local_label_name (bfd abfd ATTRIBUTE_UNUSED, const char name)
252b5132 RH	44	{
	45	return name[0] == '@';
	46	}
	47
b48499ec	48	static bfd_reloc_status_type
2c3fc389 NC	49	m88k_special_reloc (bfd *abfd,
	50	arelent *reloc_entry,
	51	asymbol *symbol,
	52	void * data,
	53	asection *input_section,
	54	bfd *output_bfd,
	55	char **error_message ATTRIBUTE_UNUSED)
252b5132 RH	56	{
	57	reloc_howto_type *howto = reloc_entry->howto;
	58
	59	switch (howto->type)
	60	{
	61	case R_HVRT16:
	62	case R_LVRT16:
	63	if (output_bfd != (bfd *) NULL)
	64	{
	65	/* This is a partial relocation, and we want to apply the
	66	relocation to the reloc entry rather than the raw data.
	67	Modify the reloc inplace to reflect what we now know. */
	68
	69	reloc_entry->address += input_section->output_offset;
	70	}
	71	else
	72	{
	73	bfd_vma output_base = 0;
	74	bfd_vma addr = reloc_entry->address;
	75	bfd_vma x = bfd_get_16 (abfd, (bfd_byte *) data + addr);
	76	asection *reloc_target_output_section;
	77	long relocation = 0;
	78
5c4491d3	79	/* Work out which section the relocation is targeted at and the
252b5132 RH	80	initial relocation command value. */
	81
	82	/* Get symbol value. (Common symbols are special.) */
	83	if (bfd_is_com_section (symbol->section))
	84	relocation = 0;
	85	else
	86	relocation = symbol->value;
	87
	88	reloc_target_output_section = symbol->section->output_section;
	89
	90	/* Convert input-section-relative symbol value to absolute. */
	91	if (output_bfd)
	92	output_base = 0;
	93	else
	94	output_base = reloc_target_output_section->vma;
	95
	96	relocation += output_base + symbol->section->output_offset;
	97
	98	/* Add in supplied addend. */
	99	relocation += ((reloc_entry->addend << howto->bitsize) + x);
	100
	101	reloc_entry->addend = 0;
	102
	103	relocation >>= (bfd_vma) howto->rightshift;
	104
	105	/* Shift everything up to where it's going to be used */
	106
	107	relocation <<= (bfd_vma) howto->bitpos;
	108
	109	if (relocation)
dc810e39 AM	110	bfd_put_16 (abfd, (bfd_vma) relocation,
dc810e39 AM	111	(unsigned char *) data + addr);
252b5132 RH	112	}
252b5132 RH	113
1049f94e	114	/* If we are not producing relocatable output, return an error if
252b5132 RH	115	the symbol is not defined. */
	116	if (bfd_is_und_section (symbol->section) && output_bfd == (bfd *) NULL)
	117	return bfd_reloc_undefined;
	118
	119	return bfd_reloc_ok;
	120
	121	default:
	122	if (output_bfd != (bfd *) NULL)
	123	{
	124	/* This is a partial relocation, and we want to apply the
	125	relocation to the reloc entry rather than the raw data.
	126	Modify the reloc inplace to reflect what we now know. */
	127
	128	reloc_entry->address += input_section->output_offset;
	129	return bfd_reloc_ok;
	130	}
	131	break;
	132	}
	133
	134	if (output_bfd == (bfd *) NULL)
	135	return bfd_reloc_continue;
	136
	137	return bfd_reloc_ok;
	138	}
	139
b48499ec	140	static reloc_howto_type howto_table[] =
252b5132 RH	141	{
	142	HOWTO (R_PCR16L, /* type */
	143	02, /* rightshift */
	144	1, /* size (0 = byte, 1 = short, 2 = long) */
	145	16, /* bitsize */
b34976b6	146	TRUE, /* pc_relative */
252b5132 RH	147	0, /* bitpos */
	148	complain_overflow_signed, /* complain_on_overflow */
	149	m88k_special_reloc, /* special_function */
	150	"PCR16L", /* name */
b34976b6	151	FALSE, /* partial_inplace */
252b5132 RH	152	0x0000ffff, /* src_mask */
252b5132 RH	153	0x0000ffff, /* dst_mask */
b34976b6	154	TRUE), /* pcrel_offset */
252b5132 RH	155
	156	HOWTO (R_PCR26L, /* type */
	157	02, /* rightshift */
	158	2, /* size (0 = byte, 1 = short, 2 = long) */
	159	26, /* bitsize */
b34976b6	160	TRUE, /* pc_relative */
252b5132 RH	161	0, /* bitpos */
	162	complain_overflow_signed, /* complain_on_overflow */
	163	m88k_special_reloc, /* special_function */
	164	"PCR26L", /* name */
b34976b6	165	FALSE, /* partial_inplace */
252b5132 RH	166	0x03ffffff, /* src_mask */
252b5132 RH	167	0x03ffffff, /* dst_mask */
b34976b6	168	TRUE), /* pcrel_offset */
252b5132 RH	169
	170	HOWTO (R_VRT16, /* type */
	171	00, /* rightshift */
	172	1, /* size (0 = byte, 1 = short, 2 = long) */
	173	16, /* bitsize */
b34976b6	174	FALSE, /* pc_relative */
252b5132 RH	175	0, /* bitpos */
	176	complain_overflow_bitfield, /* complain_on_overflow */
	177	m88k_special_reloc, /* special_function */
	178	"VRT16", /* name */
b34976b6	179	FALSE, /* partial_inplace */
252b5132 RH	180	0x0000ffff, /* src_mask */
252b5132 RH	181	0x0000ffff, /* dst_mask */
b34976b6	182	TRUE), /* pcrel_offset */
252b5132 RH	183
	184	HOWTO (R_HVRT16, /* type */
	185	16, /* rightshift */
	186	1, /* size (0 = byte, 1 = short, 2 = long) */
	187	16, /* bitsize */
b34976b6	188	FALSE, /* pc_relative */
252b5132 RH	189	0, /* bitpos */
	190	complain_overflow_dont, /* complain_on_overflow */
	191	m88k_special_reloc, /* special_function */
	192	"HVRT16", /* name */
b34976b6	193	FALSE, /* partial_inplace */
252b5132 RH	194	0x0000ffff, /* src_mask */
252b5132 RH	195	0x0000ffff, /* dst_mask */
b34976b6	196	TRUE), /* pcrel_offset */
252b5132 RH	197
	198	HOWTO (R_LVRT16, /* type */
	199	00, /* rightshift */
	200	1, /* size (0 = byte, 1 = short, 2 = long) */
	201	16, /* bitsize */
b34976b6	202	FALSE, /* pc_relative */
252b5132 RH	203	0, /* bitpos */
	204	complain_overflow_dont, /* complain_on_overflow */
	205	m88k_special_reloc, /* special_function */
	206	"LVRT16", /* name */
b34976b6	207	FALSE, /* partial_inplace */
252b5132 RH	208	0x0000ffff, /* src_mask */
252b5132 RH	209	0x0000ffff, /* dst_mask */
b34976b6	210	TRUE), /* pcrel_offset */
252b5132 RH	211
	212	HOWTO (R_VRT32, /* type */
	213	00, /* rightshift */
	214	2, /* size (0 = byte, 1 = short, 2 = long) */
	215	32, /* bitsize */
b34976b6	216	FALSE, /* pc_relative */
252b5132 RH	217	0, /* bitpos */
	218	complain_overflow_bitfield, /* complain_on_overflow */
	219	m88k_special_reloc, /* special_function */
	220	"VRT32", /* name */
b34976b6	221	FALSE, /* partial_inplace */
252b5132 RH	222	0xffffffff, /* src_mask */
252b5132 RH	223	0xffffffff, /* dst_mask */
b34976b6	224	TRUE), /* pcrel_offset */
252b5132 RH	225	};
	226
	227	/* Code to turn an external r_type into a pointer to an entry in the
	228	above howto table. */
	229	static void
2c3fc389	230	rtype2howto (arelent cache_ptr, struct internal_reloc dst)
252b5132 RH	231	{
	232	if (dst->r_type >= R_PCR16L && dst->r_type <= R_VRT32)
	233	{
	234	cache_ptr->howto = howto_table + dst->r_type - R_PCR16L;
	235	}
	236	else
	237	{
	238	BFD_ASSERT (0);
	239	}
	240	}
	241
	242	#define RTYPE2HOWTO(cache_ptr, dst) rtype2howto (cache_ptr, dst)
	243
252b5132	244	/* Code to swap in the reloc offset */
dc810e39 AM	245	#define SWAP_IN_RELOC_OFFSET H_GET_16
dc810e39 AM	246	#define SWAP_OUT_RELOC_OFFSET H_PUT_16
252b5132	247
252b5132 RH	248	#define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \
	249	reloc_processing(relent, reloc, symbols, abfd, section)
	250
	251	static void
2c3fc389 NC	252	reloc_processing (arelent *relent,
	253	struct internal_reloc *reloc,
	254	asymbol **symbols,
	255	bfd *abfd,
	256	asection *section)
252b5132 RH	257	{
	258	relent->address = reloc->r_vaddr;
	259	rtype2howto (relent, reloc);
	260
	261	if (((int) reloc->r_symndx) > 0)
	262	{
	263	relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx];
	264	}
	265	else
	266	{
	267	relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
	268	}
	269
	270	relent->addend = reloc->r_offset;
	271	relent->address -= section->vma;
	272	}
	273
	274	#define BADMAG(x) MC88BADMAG(x)
2b5c217d NC	275
	276	#ifndef bfd_pe_print_pdata
	277	#define bfd_pe_print_pdata NULL
	278	#endif
	279
252b5132 RH	280	#include "coffcode.h"
	281
	282	#undef coff_write_armap
	283
6d00b590	284	CREATE_BIG_COFF_TARGET_VEC (m88k_coff_bcs_vec, "coff-m88kbcs", 0, 0, '_', NULL, COFF_SWAP_TABLE)