289 lines
7.5 KiB
C
289 lines
7.5 KiB
C
/* BFD back-end for Zilog Z800n COFF binaries.
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Copyright 1992 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., 675 Mass Ave, Cambridge, MA 02139, 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 "obstack.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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#include "seclet.h"
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extern bfd_error_vector_type bfd_error_vector;
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/* Dummy for now */
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static bfd_reloc_status_type
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DEFUN (func_da, (abfd, reloc_entry, symbol, data, input_section, output_bfd),
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bfd * abfd AND
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arelent * reloc_entry AND
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struct symbol_cache_entry *symbol AND
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PTR data AND
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asection * input_section AND
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bfd * output_bfd)
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{
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}
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/* Dummy for now */
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static bfd_reloc_status_type
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DEFUN (func_imm8, (abfd, reloc_entry, symbol, data, input_section, output_bfd),
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bfd * abfd AND
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arelent * reloc_entry AND
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struct symbol_cache_entry *symbol AND
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PTR data AND
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asection * input_section AND
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bfd * output_bfd)
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{
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}
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/* Dummy for now */
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static bfd_reloc_status_type
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DEFUN (func_jr, (abfd, reloc_entry, symbol, data, input_section, output_bfd),
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bfd * abfd AND
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arelent * reloc_entry AND
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struct symbol_cache_entry *symbol AND
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PTR data AND
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asection * input_section AND
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bfd * output_bfd)
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{
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}
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static reloc_howto_type r_imm32 =
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HOWTO (R_IMM32, 0, 1, 32, false, 0, true,
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true, func_jr, "r_imm32", true, 0xffffffff, 0xffffffff, false);
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static reloc_howto_type r_imm4l =
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HOWTO (R_IMM4L, 0, 1, 4, false, 0, true,
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true, func_jr, "r_imm4l", true, 0xf, 0xf, false);
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static reloc_howto_type r_da =
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HOWTO (R_DA, 0, 1, 16, false, 0, true,
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true, func_da, "r_da", true, 0x0000ffff, 0x0000ffff, false);
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static reloc_howto_type r_imm8 =
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HOWTO (R_IMM8, 0, 1, 8, false, 0, true,
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true, func_imm8, "r_imm8", true, 0x000000ff, 0x000000ff, false);
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static reloc_howto_type r_jr =
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HOWTO (R_JR, 0, 1, 8, true, 0, true, true, func_jr, "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= 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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DEFUN (rtype2howto, (internal, dst),
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arelent * internal AND
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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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printf ("BAD %x\n", dst->r_type);
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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_DA:
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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 necessaru 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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DEFUN (reloc_processing, (relent, reloc, symbols, abfd, section),
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arelent * relent AND
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struct internal_reloc *reloc AND
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asymbol ** symbols AND
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bfd * abfd AND
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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_symbol);
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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, seclet, reloc, data, src_ptr, dst_ptr)
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bfd *in_abfd;
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bfd_seclet_type *seclet;
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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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switch (reloc->howto->type)
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{
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case R_IMM8:
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bfd_put_8 (in_abfd, bfd_coff_reloc16_get_value (reloc, seclet),
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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, bfd_coff_reloc16_get_value (reloc, seclet),
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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 & bfd_coff_reloc16_get_value (reloc, seclet)),
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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_DA:
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bfd_put_16 (in_abfd, bfd_coff_reloc16_get_value (reloc, seclet),
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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, seclet);
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bfd_vma dot = seclet->offset
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+ *dst_ptr
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+ seclet->u.indirect.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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bfd_error_vector.reloc_value_truncated (reloc, seclet);
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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 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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bfd_target z8kcoff_vec =
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{
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"coff-z8k", /* name */
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bfd_target_coff_flavour,
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true, /* data byte order is big */
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true, /* header byte order is big */
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(HAS_RELOC | EXEC_P | /* object flags */
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HAS_LINENO | HAS_DEBUG |
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HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT),
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(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
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'_', /* leading symbol underscore */
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'/', /* ar_pad_char */
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15, /* ar_max_namelen */
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1, /* minimum section alignment */
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_do_getb64, _do_putb64, _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* data */
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_do_getb64, _do_putb64, _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* hdrs */
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{_bfd_dummy_target, coff_object_p, /* bfd_check_format */
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bfd_generic_archive_p, _bfd_dummy_target},
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{bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */
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bfd_false},
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{bfd_false, coff_write_object_contents, /* bfd_write_contents */
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_bfd_write_archive_contents, bfd_false},
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JUMP_TABLE (coff),
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0, 0,
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COFF_SWAP_TABLE,
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};
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