From d35e14863d21e7fbfdc164be51d6689cb7d9214f Mon Sep 17 00:00:00 2001 From: Nick Clifton Date: Tue, 25 Oct 2005 17:40:19 +0000 Subject: Add support for the Z80 processor family --- bfd/coff-z80.c | 244 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 244 insertions(+) create mode 100644 bfd/coff-z80.c (limited to 'bfd/coff-z80.c') diff --git a/bfd/coff-z80.c b/bfd/coff-z80.c new file mode 100644 index 0000000000..fe401d77b8 --- /dev/null +++ b/bfd/coff-z80.c @@ -0,0 +1,244 @@ +/* BFD back-end for Zilog Z80 COFF binaries. + Copyright 2005 Free Software Foundation, Inc. + Contributed by Arnold Metselaar + + 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., 51 Franklin Street - Fifth Floor, Boston, + MA 02110-1301, USA. */ + +#include "bfd.h" +#include "sysdep.h" +#include "libbfd.h" +#include "bfdlink.h" +#include "coff/z80.h" +#include "coff/internal.h" +#include "libcoff.h" + +#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER 0 + +static reloc_howto_type r_imm32 = +HOWTO (R_IMM32, 0, 1, 32, FALSE, 0, + complain_overflow_dont, 0, "r_imm32", TRUE, 0xffffffff, 0xffffffff, + FALSE); + +static reloc_howto_type r_imm16 = +HOWTO (R_IMM16, 0, 1, 16, FALSE, 0, + complain_overflow_dont, 0, "r_imm16", TRUE, 0x0000ffff, 0x0000ffff, + FALSE); + +static reloc_howto_type r_imm8 = +HOWTO (R_IMM8, 0, 0, 8, FALSE, 0, + complain_overflow_bitfield, 0, "r_imm8", TRUE, 0x000000ff, 0x000000ff, + FALSE); + +static reloc_howto_type r_jr = +HOWTO (R_JR, 0, 0, 8, TRUE, 0, + complain_overflow_signed, 0, "r_jr", FALSE, 0, 0xFF, + FALSE); + +static reloc_howto_type r_off8 = +HOWTO (R_OFF8, 0, 0, 8, FALSE, 0, + complain_overflow_signed, 0,"r_off8", FALSE, 0, 0xff, + FALSE); + + +#define BADMAG(x) Z80BADMAG(x) +#define Z80 1 /* Customize coffcode.h. */ +#define __A_MAGIC_SET__ + +/* Code to swap in the reloc. */ + +#define SWAP_IN_RELOC_OFFSET H_GET_32 +#define SWAP_OUT_RELOC_OFFSET 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 (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_imm16; + break; + case R_IMM32: + internal->howto = &r_imm32; + break; + case R_JR: + internal->howto = &r_jr; + break; + case R_OFF8: + internal->howto = &r_off8; + break; + } +} + +#define RTYPE2HOWTO(internal, relocentry) rtype2howto (internal, relocentry) + +static reloc_howto_type * +coff_z80_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, + bfd_reloc_code_real_type code) +{ + switch (code) + { + case BFD_RELOC_8: return & r_imm8; + case BFD_RELOC_16: return & r_imm16; + case BFD_RELOC_32: return & r_imm32; + case BFD_RELOC_8_PCREL: return & r_jr; + case BFD_RELOC_Z80_DISP8: return & r_off8; + default: BFD_FAIL (); + return NULL; + } +} + +/* 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 (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 (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; + int val; + + switch (reloc->howto->type) + { + case R_OFF8: + val = bfd_coff_reloc16_get_value (reloc, link_info, + input_section); + if (val>127 || val<-128) /* Test for overflow. */ + { + if (! ((*link_info->callbacks->reloc_overflow) + (link_info, NULL, + 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, val, data + *dst_ptr); + (*dst_ptr) += 1; + (*src_ptr) += 1; + break; + + case R_IMM8: + val = bfd_get_16 ( in_abfd, data+*src_ptr) + + bfd_coff_reloc16_get_value (reloc, link_info, input_section); + bfd_put_8 (in_abfd, val, data + *dst_ptr); + (*dst_ptr) += 1; + (*src_ptr) += 1; + break; + + case R_IMM16: + val = bfd_get_16 ( in_abfd, data+*src_ptr) + + bfd_coff_reloc16_get_value (reloc, link_info, input_section); + bfd_put_16 (in_abfd, val, data + *dst_ptr); + (*dst_ptr) += 2; + (*src_ptr) += 2; + break; + + case R_IMM32: + val = bfd_get_32 ( in_abfd, data+*src_ptr) + + bfd_coff_reloc16_get_value (reloc, link_info, input_section); + bfd_put_32 (in_abfd, val, data + *dst_ptr); + (*dst_ptr) += 4; + (*src_ptr) += 4; + 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 the offset is relative + to the value of PC after reading + the offset. */ + + if (gap >= 128 || gap < -128) + { + if (! ((*link_info->callbacks->reloc_overflow) + (link_info, NULL, + 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 +#define coff_bfd_reloc_type_lookup coff_z80_reloc_type_lookup + +#include "coffcode.h" + +#undef coff_bfd_get_relocated_section_contents +#define coff_bfd_get_relocated_section_contents \ + bfd_coff_reloc16_get_relocated_section_contents + +#undef coff_bfd_relax_section +#define coff_bfd_relax_section bfd_coff_reloc16_relax_section + +CREATE_LITTLE_COFF_TARGET_VEC (z80coff_vec, "coff-z80", 0, 0, '\0', NULL, + COFF_SWAP_TABLE) + -- cgit v1.2.1