075caafd65
Somewhat more could be done. Fri Jan 8 15:47:53 1993 Ian Lance Taylor (ian@tweedledumb.cygnus.com) * coffcode.h: Moved many generic functions into coffgen.c. Moved swapping functions into coffswap.h for ECOFF use. Moved relocation functions, only used by h8300 and z8k, into reloc16.c. Added hooks for coffgen.c functions to backend data structure, and added hook functions. Still more could be done. * coffswap.h: New file to hold COFF swapping routines. * coffgen.c: New file to hold generic COFF functions. * reloc16.c: New file to hold h8300 and z8k specific relocation functions. * libcoff-in.h: Added declarations for functions in coffgen.c. * libcoff.h: Rebuilt to incorporate changes. * coff-h8300.c: Function name changes. * coff-z8k.c: Function name changes. Use coff_reloc16_extra_cases hook rather than defining EXTRA_CASES. * Makefile.in: Build new files coffgen and reloc16. Added dependencies of coff-*.o on coffswap.h and seclet.h.
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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