diff options
Diffstat (limited to 'bfd/coff-z8k.c')
| -rw-r--r-- | bfd/coff-z8k.c | 280 |
1 files changed, 280 insertions, 0 deletions
diff --git a/bfd/coff-z8k.c b/bfd/coff-z8k.c new file mode 100644 index 0000000..04049e89 --- /dev/null +++ b/bfd/coff-z8k.c @@ -0,0 +1,280 @@ +/* BFD back-end for Zilog Z800n COFF binaries. + Copyright 1992, 93, 94, 95, 1997 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 + +const bfd_target z8kcoff_vec = +{ + "coff-z8k", /* name */ + bfd_target_coff_flavour, + BFD_ENDIAN_BIG, /* data byte order is big */ + BFD_ENDIAN_BIG, /* header byte order is big */ + + (HAS_RELOC | EXEC_P | /* object flags */ + HAS_LINENO | HAS_DEBUG | + HAS_SYMS | HAS_LOCALS | WP_TEXT), + + (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ + '_', /* leading symbol underscore */ + '/', /* ar_pad_char */ + 15, /* ar_max_namelen */ + bfd_getb64, bfd_getb_signed_64, bfd_putb64, + bfd_getb32, bfd_getb_signed_32, bfd_putb32, + bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */ + bfd_getb64, bfd_getb_signed_64, bfd_putb64, + bfd_getb32, bfd_getb_signed_32, bfd_putb32, + bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */ + + {_bfd_dummy_target, coff_object_p, /* bfd_check_format */ + bfd_generic_archive_p, _bfd_dummy_target}, + {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), + + COFF_SWAP_TABLE, +}; |