/* BFD back-end for Zilog Z80 COFF binaries. Copyright 2005, 2007, 2008 Free Software Foundation, Inc. Contributed by Arnold Metselaar <arnold_m@operamail.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 3 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 "sysdep.h" #include "bfd.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, 2, 32, FALSE, 0, complain_overflow_dont, 0, "r_imm32", TRUE, 0xffffffff, 0xffffffff, FALSE); static reloc_howto_type r_imm24 = HOWTO (R_IMM24, 0, 1, 24, FALSE, 0, complain_overflow_dont, 0, "r_imm24", TRUE, 0x00ffffff, 0x00ffffff, 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_IMM24: internal->howto = &r_imm24; 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_24: return & r_imm24; 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; } } static reloc_howto_type * coff_z80_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name) { if (strcasecmp (r_imm8.name, r_name) == 0) return &r_imm8; if (strcasecmp (r_imm16.name, r_name) == 0) return &r_imm16; if (strcasecmp (r_imm24.name, r_name) == 0) return &r_imm24; if (strcasecmp (r_imm32.name, r_name) == 0) return &r_imm32; if (strcasecmp (r_jr.name, r_name) == 0) return &r_jr; if (strcasecmp (r_off8.name, r_name) == 0) return &r_off8; 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_8 ( 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_IMM24: val = bfd_get_16 ( in_abfd, data+*src_ptr) + (bfd_get_8 ( in_abfd, data+*src_ptr+2) << 16) + bfd_coff_reloc16_get_value (reloc, link_info, input_section); bfd_put_16 (in_abfd, val, data + *dst_ptr); bfd_put_8 (in_abfd, val >> 16, data + *dst_ptr+2); (*dst_ptr) += 3; (*src_ptr) += 3; 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 = (*dst_ptr + input_section->output_offset + 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 #define coff_bfd_reloc_name_lookup coff_z80_reloc_name_lookup #ifndef bfd_pe_print_pdata #define bfd_pe_print_pdata NULL #endif #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)