diff options
Diffstat (limited to 'bfd/coff-w65.c')
| -rw-r--r-- | bfd/coff-w65.c | 445 |
1 files changed, 445 insertions, 0 deletions
diff --git a/bfd/coff-w65.c b/bfd/coff-w65.c new file mode 100644 index 00000000000..28d68c37998 --- /dev/null +++ b/bfd/coff-w65.c @@ -0,0 +1,445 @@ +/* BFD back-end for WDC 65816 COFF binaries. + Copyright 1995, 96, 1997 Free Software Foundation, Inc. + 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/w65.h" +#include "coff/internal.h" +#include "libcoff.h" + +#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (1) +static reloc_howto_type howto_table[] = +{ + HOWTO (R_W65_ABS8, 0, 0, 8, false, 0, complain_overflow_bitfield, 0, "abs8", true, 0x000000ff, 0x000000ff, false), + HOWTO (R_W65_ABS16, 1, 0, 16, false, 0, complain_overflow_bitfield, 0, "abs16", true, 0x0000ffff, 0x0000ffff, false), + HOWTO (R_W65_ABS24, 0, 2, 32, false, 0, complain_overflow_bitfield, 0, "abs24", true, 0x00ffffff, 0x00ffffff, false), + HOWTO (R_W65_ABS8S8, 0, 0, 8, false, 0, complain_overflow_bitfield, 0, ">abs8", true, 0x000000ff, 0x000000ff, false), + HOWTO (R_W65_ABS8S16, 0, 0, 8, false, 0, complain_overflow_bitfield, 0, "^abs8", true, 0x000000ff, 0x000000ff, false), + HOWTO (R_W65_ABS16S8, 1, 0, 16, false, 0, complain_overflow_bitfield, 0, ">abs16", true, 0x0000ffff, 0x0000ffff, false), + HOWTO (R_W65_ABS16S16,1, 0, 16, false, 0, complain_overflow_bitfield, 0, "^abs16", true, 0x0000ffff, 0x0000ffff, false), + HOWTO (R_W65_PCR8, 0, 0, 8, false, 0, complain_overflow_bitfield, 0, "pcrel8", true, 0x000000ff, 0x000000ff, true), + HOWTO (R_W65_PCR16, 1, 0, 16, false, 0, complain_overflow_bitfield, 0, "pcrel16", true, 0x0000ffff, 0x0000ffff, true), + HOWTO (R_W65_DP, 0, 0, 8, false, 0, complain_overflow_bitfield, 0, "dp", true, 0x000000ff, 0x000000ff, false), + +}; + + +/* Turn a howto into a reloc number */ + +#define SELECT_RELOC(x,howto) \ + { x.r_type = select_reloc(howto); } + +#define BADMAG(x) (W65BADMAG(x)) +#define W65 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'; + + +static int +select_reloc (howto) + reloc_howto_type *howto; +{ + return howto->type ; +} + +/* 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; +{ + internal->howto = howto_table + dst->r_type - 1; +} + +#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 (((int) reloc->r_symndx) > 0) + { + relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx]; + } + else + { + relent->sym_ptr_ptr = (asymbol **)&(bfd_abs_symbol); + } + + + + relent->addend = reloc->r_offset; + + relent->address -= section->vma; + /* relent->section = 0;*/ +} + + +static int +h8300_reloc16_estimate(abfd, input_section, reloc, shrink, link_info) + bfd *abfd; + asection *input_section; + arelent *reloc; + unsigned int shrink; + struct bfd_link_info *link_info; +{ + bfd_vma value; + bfd_vma dot; + bfd_vma gap; + + /* The address of the thing to be relocated will have moved back by + the size of the shrink - but we don't change reloc->address here, + since we need it to know where the relocation lives in the source + uncooked section */ + + /* reloc->address -= shrink; conceptual */ + + bfd_vma address = reloc->address - shrink; + + + switch (reloc->howto->type) + { + case R_MOV16B2: + case R_JMP2: + shrink+=2; + break; + + /* Thing is a move one byte */ + case R_MOV16B1: + value = bfd_coff_reloc16_get_value(reloc, link_info, input_section); + + if (value >= 0xff00) + { + + /* Change the reloc type from 16bit, possible 8 to 8bit + possible 16 */ + reloc->howto = reloc->howto + 1; + /* The place to relc moves back by one */ + /* This will be two bytes smaller in the long run */ + shrink +=2 ; + bfd_perform_slip(abfd, 2, input_section, address); + } + + break; + /* This is the 24 bit branch which could become an 8 bitter, + the relocation points to the first byte of the insn, not the + actual data */ + + case R_JMPL1: + value = bfd_coff_reloc16_get_value(reloc, link_info, input_section); + + dot = input_section->output_section->vma + + input_section->output_offset + address; + + /* See if the address we're looking at within 127 bytes of where + we are, if so then we can use a small branch rather than the + jump we were going to */ + + gap = value - dot ; + + if (-120 < (long)gap && (long)gap < 120 ) + { + + /* Change the reloc type from 24bit, possible 8 to 8bit + possible 32 */ + reloc->howto = reloc->howto + 1; + /* This will be two bytes smaller in the long run */ + shrink +=2 ; + bfd_perform_slip(abfd, 2, input_section, address); + } + break; + + case R_JMP1: + + value = bfd_coff_reloc16_get_value(reloc, link_info, input_section); + + dot = input_section->output_section->vma + + input_section->output_offset + address; + + /* See if the address we're looking at within 127 bytes of where + we are, if so then we can use a small branch rather than the + jump we were going to */ + + gap = value - (dot - shrink); + + + if (-120 < (long)gap && (long)gap < 120 ) + { + + /* Change the reloc type from 16bit, possible 8 to 8bit + possible 16 */ + reloc->howto = reloc->howto + 1; + /* The place to relc moves back by one */ + + /* This will be two bytes smaller in the long run */ + shrink +=2 ; + bfd_perform_slip(abfd, 2, input_section, address); + } + break; + } + + + return shrink; +} + + +/* First phase of a relaxing link */ + +/* Reloc types + large small + R_MOV16B1 R_MOV16B2 mov.b with 16bit or 8 bit address + R_JMP1 R_JMP2 jmp or pcrel branch + R_JMPL1 R_JMPL_B8 24jmp or pcrel branch + R_MOV24B1 R_MOV24B2 24 or 8 bit reloc for mov.b + +*/ + +static void +h8300_reloc16_extra_cases (abfd, link_info, link_order, reloc, data, src_ptr, + dst_ptr) + bfd *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; +{ + unsigned int src_address = *src_ptr; + unsigned int dst_address = *dst_ptr; + asection *input_section = link_order->u.indirect.section; + + switch (reloc->howto->type) + { + case R_W65_ABS8: + case R_W65_DP: + { + unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info, + input_section); + bfd_put_8 (abfd, gap, data + dst_address); + dst_address += 1; + src_address += 1; + } + break; + + case R_W65_ABS8S8: + { + unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info, + input_section); + gap >>= 8; + bfd_put_8 (abfd, gap, data + dst_address); + dst_address += 1; + src_address += 1; + } + break; + + case R_W65_ABS8S16: + { + unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info, + input_section); + gap >>=16; + bfd_put_8 (abfd, gap, data + dst_address); + dst_address += 1; + src_address += 1; + } + break; + + case R_W65_ABS16: + { + unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info, + input_section); + + bfd_put_16 (abfd, gap, data + dst_address); + dst_address += 2; + src_address += 2; + } + break; + case R_W65_ABS16S8: + { + unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info, + input_section); + gap >>= 8; + bfd_put_16 (abfd, gap, data + dst_address); + dst_address += 2; + src_address += 2; + } + break; + case R_W65_ABS16S16: + { + unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info, + input_section); + gap >>= 16; + bfd_put_16 (abfd, gap, data + dst_address); + dst_address += 2; + src_address += 2; + } + break; + + case R_W65_ABS24: + { + unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info, + input_section); + bfd_put_16 (abfd, gap, data + dst_address); + bfd_put_8 (abfd, gap>>16, data+dst_address+2); + dst_address += 3; + src_address += 3; + } + break; + + case R_W65_PCR8: + { + int gap = bfd_coff_reloc16_get_value (reloc, link_info, + input_section); + bfd_vma dot = link_order->offset + + dst_address + + link_order->u.indirect.section->output_section->vma; + + gap -= dot + 1; + if (gap < -128 || gap > 127) { + 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 (abfd, gap, data + dst_address); + dst_address += 1; + src_address += 1; + } + break; + + case R_W65_PCR16: + { + bfd_vma gap = bfd_coff_reloc16_get_value (reloc, link_info, + input_section); + bfd_vma dot = link_order->offset + + dst_address + + link_order->u.indirect.section->output_section->vma; + + + /* This wraps within the page, so ignore the relativeness, look at the + high part */ + if ((gap & 0xf0000) != (dot & 0xf0000)) { + 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(); + } + + gap -= dot + 2; + bfd_put_16 (abfd, gap, data + dst_address); + dst_address += 2; + src_address += 2; + } + break; + default: + printf(_("ignoring reloc %s\n"), reloc->howto->name); + break; + + } + *src_ptr = src_address; + *dst_ptr = dst_address; + +} + +#define coff_reloc16_extra_cases h8300_reloc16_extra_cases +#define coff_reloc16_estimate h8300_reloc16_estimate + +#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 + + + +bfd_target w65_vec = +{ + "coff-w65", /* name */ + bfd_target_coff_flavour, + BFD_ENDIAN_LITTLE, /* data byte order is little */ + BFD_ENDIAN_LITTLE, /* header byte order is little */ + + (HAS_RELOC | EXEC_P | /* object flags */ + HAS_LINENO | HAS_DEBUG | + HAS_SYMS | HAS_LOCALS | WP_TEXT | BFD_IS_RELAXABLE ), + (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ + '_', /* leading char */ + '/', /* ar_pad_char */ + 15, /* ar_max_namelen */ + bfd_getl64, bfd_getl_signed_64, bfd_putl64, + bfd_getl32, bfd_getl_signed_32, bfd_putl32, + bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ + bfd_getl64, bfd_getl_signed_64, bfd_putl64, + bfd_getl32, bfd_getl_signed_32, bfd_putl32, + bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* 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, +}; |