mirror of
https://github.com/autc04/Retro68.git
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297 lines
8.5 KiB
C
297 lines
8.5 KiB
C
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/* BFD back-end for Motorola 88000 COFF "Binary Compatibility Standard" files.
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Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1997, 1998, 1999, 2000,
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2001, 2002, 2003, 2005, 2007, 2008 Free Software Foundation, Inc.
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Written by Cygnus Support.
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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 3 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., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#define M88 1 /* Customize various include files */
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#include "sysdep.h"
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#include "bfd.h"
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#include "libbfd.h"
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#include "coff/m88k.h"
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#include "coff/internal.h"
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#include "libcoff.h"
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static bfd_boolean m88k_is_local_label_name PARAMS ((bfd *, const char *));
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static bfd_reloc_status_type m88k_special_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static void rtype2howto PARAMS ((arelent *, struct internal_reloc *));
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static void reloc_processing
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PARAMS ((arelent *, struct internal_reloc *, asymbol **, bfd *, asection *));
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#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (3)
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#define GET_SCNHDR_NRELOC H_GET_32
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#define GET_SCNHDR_NLNNO H_GET_32
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/* On coff-m88k, local labels start with '@'. */
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#define coff_bfd_is_local_label_name m88k_is_local_label_name
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static bfd_boolean
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m88k_is_local_label_name (abfd, name)
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bfd *abfd ATTRIBUTE_UNUSED;
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const char *name;
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{
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return name[0] == '@';
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}
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static bfd_reloc_status_type
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m88k_special_reloc (abfd, reloc_entry, symbol, data,
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input_section, output_bfd, error_message)
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bfd *abfd;
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arelent *reloc_entry;
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asymbol *symbol;
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PTR data;
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asection *input_section;
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bfd *output_bfd;
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char **error_message ATTRIBUTE_UNUSED;
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{
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reloc_howto_type *howto = reloc_entry->howto;
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switch (howto->type)
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{
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case R_HVRT16:
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case R_LVRT16:
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if (output_bfd != (bfd *) NULL)
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{
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/* This is a partial relocation, and we want to apply the
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relocation to the reloc entry rather than the raw data.
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Modify the reloc inplace to reflect what we now know. */
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reloc_entry->address += input_section->output_offset;
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}
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else
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{
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bfd_vma output_base = 0;
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bfd_vma addr = reloc_entry->address;
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bfd_vma x = bfd_get_16 (abfd, (bfd_byte *) data + addr);
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asection *reloc_target_output_section;
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long relocation = 0;
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/* Work out which section the relocation is targeted at and the
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initial relocation command value. */
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/* Get symbol value. (Common symbols are special.) */
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if (bfd_is_com_section (symbol->section))
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relocation = 0;
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else
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relocation = symbol->value;
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reloc_target_output_section = symbol->section->output_section;
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/* Convert input-section-relative symbol value to absolute. */
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if (output_bfd)
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output_base = 0;
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else
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output_base = reloc_target_output_section->vma;
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relocation += output_base + symbol->section->output_offset;
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/* Add in supplied addend. */
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relocation += ((reloc_entry->addend << howto->bitsize) + x);
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reloc_entry->addend = 0;
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relocation >>= (bfd_vma) howto->rightshift;
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/* Shift everything up to where it's going to be used */
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relocation <<= (bfd_vma) howto->bitpos;
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if (relocation)
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bfd_put_16 (abfd, (bfd_vma) relocation,
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(unsigned char *) data + addr);
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}
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/* If we are not producing relocatable output, return an error if
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the symbol is not defined. */
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if (bfd_is_und_section (symbol->section) && output_bfd == (bfd *) NULL)
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return bfd_reloc_undefined;
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return bfd_reloc_ok;
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default:
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if (output_bfd != (bfd *) NULL)
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{
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/* This is a partial relocation, and we want to apply the
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relocation to the reloc entry rather than the raw data.
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Modify the reloc inplace to reflect what we now know. */
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reloc_entry->address += input_section->output_offset;
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return bfd_reloc_ok;
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}
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break;
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}
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if (output_bfd == (bfd *) NULL)
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return bfd_reloc_continue;
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return bfd_reloc_ok;
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}
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static reloc_howto_type howto_table[] =
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{
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HOWTO (R_PCR16L, /* type */
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02, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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m88k_special_reloc, /* special_function */
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"PCR16L", /* name */
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FALSE, /* partial_inplace */
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0x0000ffff, /* src_mask */
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0x0000ffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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HOWTO (R_PCR26L, /* type */
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02, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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26, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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m88k_special_reloc, /* special_function */
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"PCR26L", /* name */
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FALSE, /* partial_inplace */
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0x03ffffff, /* src_mask */
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0x03ffffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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HOWTO (R_VRT16, /* type */
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00, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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m88k_special_reloc, /* special_function */
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"VRT16", /* name */
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FALSE, /* partial_inplace */
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0x0000ffff, /* src_mask */
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0x0000ffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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HOWTO (R_HVRT16, /* type */
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16, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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m88k_special_reloc, /* special_function */
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"HVRT16", /* name */
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FALSE, /* partial_inplace */
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0x0000ffff, /* src_mask */
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0x0000ffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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HOWTO (R_LVRT16, /* type */
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00, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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m88k_special_reloc, /* special_function */
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"LVRT16", /* name */
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FALSE, /* partial_inplace */
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0x0000ffff, /* src_mask */
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0x0000ffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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HOWTO (R_VRT32, /* type */
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00, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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m88k_special_reloc, /* special_function */
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"VRT32", /* name */
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FALSE, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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};
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/* Code to turn an external r_type into a pointer to an entry in the
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above howto table. */
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static void
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rtype2howto (cache_ptr, dst)
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arelent *cache_ptr;
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struct internal_reloc *dst;
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{
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if (dst->r_type >= R_PCR16L && dst->r_type <= R_VRT32)
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{
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cache_ptr->howto = howto_table + dst->r_type - R_PCR16L;
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}
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else
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{
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BFD_ASSERT (0);
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}
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}
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#define RTYPE2HOWTO(cache_ptr, dst) rtype2howto (cache_ptr, dst)
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/* Code to swap in the reloc offset */
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#define SWAP_IN_RELOC_OFFSET H_GET_16
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#define SWAP_OUT_RELOC_OFFSET H_PUT_16
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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 (((int) 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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#define BADMAG(x) MC88BADMAG(x)
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#ifndef bfd_pe_print_pdata
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#define bfd_pe_print_pdata NULL
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#endif
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#include "coffcode.h"
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#undef coff_write_armap
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CREATE_BIG_COFF_TARGET_VEC (m88kbcs_vec, "coff-m88kbcs", 0, 0, '_', NULL, COFF_SWAP_TABLE)
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