[deliverable/binutils-gdb.git] / bfd / coff-z8k.c

/* BFD back-end for Zilog Z800n COFF binaries.
   Copyright 1992, 1993, 1994, 1995, 1997, 1999, 2000
   Free Software Foundation, Inc.
   Contributed by Cygnus Support.
   Written by Steve Chamberlain, <sac@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 "libbfd.h"
#include "bfdlink.h"
#include "coff/z8k.h"
#include "coff/internal.h"
#include "libcoff.h"

#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (1)

static reloc_howto_type r_imm32 =
HOWTO (R_IMM32, 0, 1, 32, false, 0,
       complain_overflow_bitfield, 0, "r_imm32", true, 0xffffffff,
       0xffffffff, false);

static reloc_howto_type r_imm4l =
HOWTO (R_IMM4L, 0, 1, 4, false, 0,
       complain_overflow_bitfield, 0, "r_imm4l", true, 0xf, 0xf, false);

static reloc_howto_type r_da =
HOWTO (R_IMM16, 0, 1, 16, false, 0,
       complain_overflow_bitfield, 0, "r_da", true, 0x0000ffff, 0x0000ffff,
       false);

static reloc_howto_type r_imm8 =
HOWTO (R_IMM8, 0, 1, 8, false, 0,
       complain_overflow_bitfield, 0, "r_imm8", true, 0x000000ff, 0x000000ff,
       false);

static reloc_howto_type r_jr =
HOWTO (R_JR, 0, 1, 8, true, 0, complain_overflow_signed, 0,
       "r_jr", true, 0, 0, true);

/* Turn a howto into a reloc number */

static int
coff_z8k_select_reloc (howto)
     reloc_howto_type *howto;
{
  return howto->type;
}

#define SELECT_RELOC(x,howto) x.r_type = coff_z8k_select_reloc(howto)

#define BADMAG(x) Z8KBADMAG(x)
#define Z8K 1			/* Customize coffcode.h */
#define __A_MAGIC_SET__

/* Code to swap in the reloc */
#define SWAP_IN_RELOC_OFFSET   bfd_h_get_32
#define SWAP_OUT_RELOC_OFFSET bfd_h_put_32
#define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \
  dst->r_stuff[0] = 'S'; \
  dst->r_stuff[1] = 'C';

/* Code to turn a r_type into a howto ptr, uses the above howto table
   */

static void
rtype2howto (internal, dst)
     arelent * internal;
     struct internal_reloc *dst;
{
  switch (dst->r_type)
    {
    default:
      abort ();
      break;
    case R_IMM8:
      internal->howto = &r_imm8;
      break;
     case R_IMM16:
      internal->howto = &r_da;
      break;
    case R_JR:
      internal->howto = &r_jr;
      break;
    case R_IMM32:
      internal->howto = &r_imm32;
      break;
    case R_IMM4L:
      internal->howto = &r_imm4l;
      break;
    }
}

#define RTYPE2HOWTO(internal, relocentry) rtype2howto(internal,relocentry)

/* Perform any necessary magic to the addend in a reloc entry */

#define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \
 cache_ptr->addend =  ext_reloc.r_offset;

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

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

  if (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;
}

static void
extra_case (in_abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr)
     bfd *in_abfd;
     struct bfd_link_info *link_info;
     struct bfd_link_order *link_order;
     arelent *reloc;
     bfd_byte *data;
     unsigned int *src_ptr;
     unsigned int *dst_ptr;
{
  asection *input_section = link_order->u.indirect.section;

  switch (reloc->howto->type)
    {
    case R_IMM8:
      bfd_put_8 (in_abfd,
		 bfd_coff_reloc16_get_value (reloc, link_info, input_section),
		 data + *dst_ptr);
      (*dst_ptr) += 1;
      (*src_ptr) += 1;
      break;

    case R_IMM32:
      bfd_put_32 (in_abfd,
		  bfd_coff_reloc16_get_value (reloc, link_info, input_section),
		  data + *dst_ptr);
      (*dst_ptr) += 4;
      (*src_ptr) += 4;
      break;

    case R_IMM4L:
      bfd_put_8 (in_abfd,
		 ((bfd_get_8 (in_abfd, data + *dst_ptr) & 0xf0)
		  | (0x0f
		     & bfd_coff_reloc16_get_value (reloc, link_info,
						   input_section))),
		 data + *dst_ptr);
      (*dst_ptr) += 1;
      (*src_ptr) += 1;
      break;

    case R_IMM16:
      bfd_put_16 (in_abfd,
		  bfd_coff_reloc16_get_value (reloc, link_info, input_section),
		  data + *dst_ptr);
      (*dst_ptr) += 2;
      (*src_ptr) += 2;
      break;

    case R_JR:
      {
	bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,
						  input_section);
	bfd_vma dot = (link_order->offset
		       + *dst_ptr
		       + input_section->output_section->vma);
	int gap = dst - dot - 1;/* -1 since were in the odd byte of the
				    word and the pc's been incremented */

	if (gap & 1)
	  abort ();
	gap /= 2;
	if (gap > 128 || gap < -128)
	  {
	    if (! ((*link_info->callbacks->reloc_overflow)
		   (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),
		    reloc->howto->name, reloc->addend, input_section->owner,
		    input_section, reloc->address)))
	      abort ();
	  }
	bfd_put_8 (in_abfd, gap, data + *dst_ptr);
	(*dst_ptr)++;
	(*src_ptr)++;
	break;
      }
    default:
      abort ();
    }
}

#define coff_reloc16_extra_cases extra_case

#include "coffcode.h"

#undef  coff_bfd_get_relocated_section_contents
#undef coff_bfd_relax_section
#define coff_bfd_get_relocated_section_contents \
  bfd_coff_reloc16_get_relocated_section_contents
#define coff_bfd_relax_section bfd_coff_reloc16_relax_section

CREATE_BIG_COFF_TARGET_VEC (z8kcoff_vec, "coff-z8k", 0, 0, '_', NULL)
Commit	Line	Data
252b5132	1	/* BFD back-end for Zilog Z800n COFF binaries.
7898deda NC	2	Copyright 1992, 1993, 1994, 1995, 1997, 1999, 2000
7898deda NC	3	Free Software Foundation, Inc.
252b5132 RH	4	Contributed by Cygnus Support.
	5	Written by Steve Chamberlain, <sac@cygnus.com>.
	6
	7	This file is part of BFD, the Binary File Descriptor library.
	8
	9	This program is free software; you can redistribute it and/or modify
	10	it under the terms of the GNU General Public License as published by
	11	the Free Software Foundation; either version 2 of the License, or
	12	(at your option) any later version.
	13
	14	This program is distributed in the hope that it will be useful,
	15	but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	GNU General Public License for more details.
	18
	19	You should have received a copy of the GNU General Public License
	20	along with this program; if not, write to the Free Software
	21	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
	22
	23	#include "bfd.h"
	24	#include "sysdep.h"
	25	#include "libbfd.h"
	26	#include "bfdlink.h"
	27	#include "coff/z8k.h"
	28	#include "coff/internal.h"
	29	#include "libcoff.h"
	30
	31	#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (1)
	32
	33	static reloc_howto_type r_imm32 =
	34	HOWTO (R_IMM32, 0, 1, 32, false, 0,
	35	complain_overflow_bitfield, 0, "r_imm32", true, 0xffffffff,
	36	0xffffffff, false);
	37
	38	static reloc_howto_type r_imm4l =
	39	HOWTO (R_IMM4L, 0, 1, 4, false, 0,
	40	complain_overflow_bitfield, 0, "r_imm4l", true, 0xf, 0xf, false);
	41
	42	static reloc_howto_type r_da =
	43	HOWTO (R_IMM16, 0, 1, 16, false, 0,
	44	complain_overflow_bitfield, 0, "r_da", true, 0x0000ffff, 0x0000ffff,
	45	false);
	46
	47	static reloc_howto_type r_imm8 =
	48	HOWTO (R_IMM8, 0, 1, 8, false, 0,
	49	complain_overflow_bitfield, 0, "r_imm8", true, 0x000000ff, 0x000000ff,
	50	false);
	51
	52	static reloc_howto_type r_jr =
	53	HOWTO (R_JR, 0, 1, 8, true, 0, complain_overflow_signed, 0,
	54	"r_jr", true, 0, 0, true);
	55
	56	/* Turn a howto into a reloc number */
	57
cbfe05c4	58	static int
252b5132 RH	59	coff_z8k_select_reloc (howto)
	60	reloc_howto_type *howto;
	61	{
	62	return howto->type;
	63	}
	64
	65	#define SELECT_RELOC(x,howto) x.r_type = coff_z8k_select_reloc(howto)
	66
252b5132 RH	67	#define BADMAG(x) Z8KBADMAG(x)
	68	#define Z8K 1 /* Customize coffcode.h */
	69	#define __A_MAGIC_SET__
	70
252b5132 RH	71	/* Code to swap in the reloc */
	72	#define SWAP_IN_RELOC_OFFSET bfd_h_get_32
	73	#define SWAP_OUT_RELOC_OFFSET bfd_h_put_32
	74	#define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \
	75	dst->r_stuff[0] = 'S'; \
	76	dst->r_stuff[1] = 'C';
	77
	78	/* Code to turn a r_type into a howto ptr, uses the above howto table
	79	*/
	80
	81	static void
	82	rtype2howto (internal, dst)
	83	arelent * internal;
	84	struct internal_reloc *dst;
	85	{
	86	switch (dst->r_type)
	87	{
	88	default:
	89	abort ();
	90	break;
	91	case R_IMM8:
	92	internal->howto = &r_imm8;
	93	break;
	94	case R_IMM16:
	95	internal->howto = &r_da;
	96	break;
	97	case R_JR:
	98	internal->howto = &r_jr;
	99	break;
	100	case R_IMM32:
	101	internal->howto = &r_imm32;
	102	break;
	103	case R_IMM4L:
	104	internal->howto = &r_imm4l;
	105	break;
	106	}
	107	}
	108
	109	#define RTYPE2HOWTO(internal, relocentry) rtype2howto(internal,relocentry)
	110
252b5132 RH	111	/* Perform any necessary magic to the addend in a reloc entry */
252b5132 RH	112
252b5132 RH	113	#define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \
	114	cache_ptr->addend = ext_reloc.r_offset;
	115
252b5132 RH	116	#define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \
	117	reloc_processing(relent, reloc, symbols, abfd, section)
	118
cbfe05c4	119	static void
252b5132 RH	120	reloc_processing (relent, reloc, symbols, abfd, section)
	121	arelent * relent;
	122	struct internal_reloc *reloc;
	123	asymbol ** symbols;
	124	bfd * abfd;
	125	asection * section;
	126	{
	127	relent->address = reloc->r_vaddr;
	128	rtype2howto (relent, reloc);
	129
	130	if (reloc->r_symndx > 0)
	131	{
	132	relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx];
	133	}
	134	else
	135	{
	136	relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
	137	}
	138
252b5132 RH	139	relent->addend = reloc->r_offset;
	140	relent->address -= section->vma;
	141	}
	142
	143	static void
	144	extra_case (in_abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr)
	145	bfd *in_abfd;
	146	struct bfd_link_info *link_info;
	147	struct bfd_link_order *link_order;
	148	arelent *reloc;
	149	bfd_byte *data;
	150	unsigned int *src_ptr;
	151	unsigned int *dst_ptr;
	152	{
	153	asection *input_section = link_order->u.indirect.section;
	154
	155	switch (reloc->howto->type)
	156	{
	157	case R_IMM8:
	158	bfd_put_8 (in_abfd,
	159	bfd_coff_reloc16_get_value (reloc, link_info, input_section),
	160	data + *dst_ptr);
	161	(*dst_ptr) += 1;
	162	(*src_ptr) += 1;
	163	break;
	164
	165	case R_IMM32:
	166	bfd_put_32 (in_abfd,
	167	bfd_coff_reloc16_get_value (reloc, link_info, input_section),
	168	data + *dst_ptr);
	169	(*dst_ptr) += 4;
	170	(*src_ptr) += 4;
	171	break;
	172
	173	case R_IMM4L:
	174	bfd_put_8 (in_abfd,
cbfe05c4	175	((bfd_get_8 (in_abfd, data + *dst_ptr) & 0xf0)
252b5132 RH	176	\| (0x0f
	177	& bfd_coff_reloc16_get_value (reloc, link_info,
	178	input_section))),
	179	data + *dst_ptr);
	180	(*dst_ptr) += 1;
	181	(*src_ptr) += 1;
	182	break;
	183
	184	case R_IMM16:
	185	bfd_put_16 (in_abfd,
	186	bfd_coff_reloc16_get_value (reloc, link_info, input_section),
	187	data + *dst_ptr);
	188	(*dst_ptr) += 2;
	189	(*src_ptr) += 2;
	190	break;
	191
	192	case R_JR:
	193	{
	194	bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,
	195	input_section);
	196	bfd_vma dot = (link_order->offset
	197	+ *dst_ptr
	198	+ input_section->output_section->vma);
	199	int gap = dst - dot - 1;/* -1 since were in the odd byte of the
	200	word and the pc's been incremented */
	201
	202	if (gap & 1)
	203	abort ();
	204	gap /= 2;
	205	if (gap > 128 \|\| gap < -128)
	206	{
	207	if (! ((*link_info->callbacks->reloc_overflow)
	208	(link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),
	209	reloc->howto->name, reloc->addend, input_section->owner,
	210	input_section, reloc->address)))
	211	abort ();
	212	}
	213	bfd_put_8 (in_abfd, gap, data + *dst_ptr);
	214	(*dst_ptr)++;
	215	(*src_ptr)++;
	216	break;
	217	}
	218	default:
	219	abort ();
	220	}
	221	}
	222
	223	#define coff_reloc16_extra_cases extra_case
	224
	225	#include "coffcode.h"
	226
252b5132 RH	227	#undef coff_bfd_get_relocated_section_contents
	228	#undef coff_bfd_relax_section
	229	#define coff_bfd_get_relocated_section_contents \
	230	bfd_coff_reloc16_get_relocated_section_contents
	231	#define coff_bfd_relax_section bfd_coff_reloc16_relax_section
	232
c3c89269	233	CREATE_BIG_COFF_TARGET_VEC (z8kcoff_vec, "coff-z8k", 0, 0, '_', NULL)