233 lines
6.1 KiB
C
233 lines
6.1 KiB
C
/* BFD back-end for Zilog Z800n COFF binaries.
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Copyright 1992, 93, 94, 95, 1997 Free Software Foundation, Inc.
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Contributed by Cygnus Support.
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Written by Steve Chamberlain, <sac@cygnus.com>.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "bfd.h"
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#include "sysdep.h"
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#include "libbfd.h"
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#include "bfdlink.h"
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#include "coff/z8k.h"
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#include "coff/internal.h"
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#include "libcoff.h"
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#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (1)
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static reloc_howto_type r_imm32 =
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HOWTO (R_IMM32, 0, 1, 32, false, 0,
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complain_overflow_bitfield, 0, "r_imm32", true, 0xffffffff,
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0xffffffff, false);
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static reloc_howto_type r_imm4l =
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HOWTO (R_IMM4L, 0, 1, 4, false, 0,
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complain_overflow_bitfield, 0, "r_imm4l", true, 0xf, 0xf, false);
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static reloc_howto_type r_da =
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HOWTO (R_IMM16, 0, 1, 16, false, 0,
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complain_overflow_bitfield, 0, "r_da", true, 0x0000ffff, 0x0000ffff,
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false);
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static reloc_howto_type r_imm8 =
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HOWTO (R_IMM8, 0, 1, 8, false, 0,
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complain_overflow_bitfield, 0, "r_imm8", true, 0x000000ff, 0x000000ff,
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false);
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static reloc_howto_type r_jr =
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HOWTO (R_JR, 0, 1, 8, true, 0, complain_overflow_signed, 0,
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"r_jr", true, 0, 0, true);
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/* Turn a howto into a reloc number */
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static int
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coff_z8k_select_reloc (howto)
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reloc_howto_type *howto;
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{
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return howto->type;
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}
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#define SELECT_RELOC(x,howto) x.r_type = coff_z8k_select_reloc(howto)
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#define BADMAG(x) Z8KBADMAG(x)
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#define Z8K 1 /* Customize coffcode.h */
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#define __A_MAGIC_SET__
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/* Code to swap in the reloc */
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#define SWAP_IN_RELOC_OFFSET bfd_h_get_32
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#define SWAP_OUT_RELOC_OFFSET bfd_h_put_32
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#define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \
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dst->r_stuff[0] = 'S'; \
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dst->r_stuff[1] = 'C';
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/* Code to turn a r_type into a howto ptr, uses the above howto table
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*/
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static void
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rtype2howto (internal, dst)
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arelent * internal;
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struct internal_reloc *dst;
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{
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switch (dst->r_type)
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{
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default:
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abort ();
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break;
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case R_IMM8:
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internal->howto = &r_imm8;
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break;
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case R_IMM16:
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internal->howto = &r_da;
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break;
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case R_JR:
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internal->howto = &r_jr;
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break;
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case R_IMM32:
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internal->howto = &r_imm32;
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break;
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case R_IMM4L:
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internal->howto = &r_imm4l;
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break;
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}
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}
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#define RTYPE2HOWTO(internal, relocentry) rtype2howto(internal,relocentry)
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/* Perform any necessary magic to the addend in a reloc entry */
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#define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \
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cache_ptr->addend = ext_reloc.r_offset;
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#define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \
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reloc_processing(relent, reloc, symbols, abfd, section)
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static void
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reloc_processing (relent, reloc, symbols, abfd, section)
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arelent * relent;
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struct internal_reloc *reloc;
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asymbol ** symbols;
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bfd * abfd;
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asection * section;
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{
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relent->address = reloc->r_vaddr;
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rtype2howto (relent, reloc);
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if (reloc->r_symndx > 0)
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{
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relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx];
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}
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else
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{
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relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
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}
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relent->addend = reloc->r_offset;
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relent->address -= section->vma;
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}
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static void
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extra_case (in_abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr)
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bfd *in_abfd;
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struct bfd_link_info *link_info;
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struct bfd_link_order *link_order;
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arelent *reloc;
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bfd_byte *data;
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unsigned int *src_ptr;
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unsigned int *dst_ptr;
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{
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asection *input_section = link_order->u.indirect.section;
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switch (reloc->howto->type)
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{
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case R_IMM8:
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bfd_put_8 (in_abfd,
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bfd_coff_reloc16_get_value (reloc, link_info, input_section),
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data + *dst_ptr);
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(*dst_ptr) += 1;
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(*src_ptr) += 1;
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break;
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case R_IMM32:
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bfd_put_32 (in_abfd,
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bfd_coff_reloc16_get_value (reloc, link_info, input_section),
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data + *dst_ptr);
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(*dst_ptr) += 4;
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(*src_ptr) += 4;
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break;
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case R_IMM4L:
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bfd_put_8 (in_abfd,
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((bfd_get_8 (in_abfd, data + *dst_ptr) & 0xf0)
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| (0x0f
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& bfd_coff_reloc16_get_value (reloc, link_info,
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input_section))),
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data + *dst_ptr);
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(*dst_ptr) += 1;
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(*src_ptr) += 1;
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break;
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case R_IMM16:
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bfd_put_16 (in_abfd,
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bfd_coff_reloc16_get_value (reloc, link_info, input_section),
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data + *dst_ptr);
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(*dst_ptr) += 2;
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(*src_ptr) += 2;
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break;
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case R_JR:
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{
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bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,
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input_section);
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bfd_vma dot = (link_order->offset
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+ *dst_ptr
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+ input_section->output_section->vma);
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int gap = dst - dot - 1;/* -1 since were in the odd byte of the
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word and the pc's been incremented */
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if (gap & 1)
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abort ();
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gap /= 2;
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if (gap > 128 || gap < -128)
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{
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if (! ((*link_info->callbacks->reloc_overflow)
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(link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),
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reloc->howto->name, reloc->addend, input_section->owner,
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input_section, reloc->address)))
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abort ();
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}
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bfd_put_8 (in_abfd, gap, data + *dst_ptr);
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(*dst_ptr)++;
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(*src_ptr)++;
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break;
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}
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default:
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abort ();
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}
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}
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#define coff_reloc16_extra_cases extra_case
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#include "coffcode.h"
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#undef coff_bfd_get_relocated_section_contents
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#undef coff_bfd_relax_section
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#define coff_bfd_get_relocated_section_contents \
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bfd_coff_reloc16_get_relocated_section_contents
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#define coff_bfd_relax_section bfd_coff_reloc16_relax_section
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CREATE_BIG_COFF_TARGET_VEC (z8kcoff_vec, "coff-z8k", 0, 0, '_', NULL)
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