/* BFD back-end for Zilog Z800n COFF binaries. Copyright 1992, 1993, 1994, 1995, 1997, 1999, 2000, 2001 Free Software Foundation, Inc. Contributed by Cygnus Support. Written by Steve Chamberlain, <sac@cygnus.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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "bfd.h" #include "sysdep.h" #include "libbfd.h" #include "bfdlink.h" #include "coff/z8k.h" #include "coff/internal.h" #include "libcoff.h" static void extra_case PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *, arelent *, bfd_byte *, unsigned int *, unsigned int *)); static void reloc_processing PARAMS ((arelent *, struct internal_reloc *, asymbol **, bfd *, asection *)); static void rtype2howto PARAMS ((arelent *, struct internal_reloc *)); static int coff_z8k_select_reloc PARAMS ((reloc_howto_type *)); #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (1) static reloc_howto_type r_imm32 = HOWTO (R_IMM32, 0, 2, 32, false, 0, complain_overflow_bitfield, 0, "r_imm32", true, 0xffffffff, 0xffffffff, false); static reloc_howto_type r_imm4l = HOWTO (R_IMM4L, 0, 0, 4, false, 0, complain_overflow_bitfield, 0, "r_imm4l", true, 0xf, 0xf, false); static reloc_howto_type r_da = HOWTO (R_IMM16, 0, 1, 16, false, 0, complain_overflow_bitfield, 0, "r_da", 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_rel16 = HOWTO (R_REL16, 0, 1, 16, false, 0, complain_overflow_bitfield, 0, "r_rel16", true, 0x0000ffff, 0x0000ffff, true); static reloc_howto_type r_jr = HOWTO (R_JR, 0, 0, 8, true, 0, complain_overflow_signed, 0, "r_jr", true, 0, 0, true); static reloc_howto_type r_disp7 = HOWTO (R_DISP7, 0, 0, 7, true, 0, complain_overflow_bitfield, 0, "r_disp7", true, 0, 0, true); static reloc_howto_type r_callr = HOWTO (R_CALLR, 0, 1, 12, true, 0, complain_overflow_signed, 0, "r_callr", true, 0xfff, 0xfff, true); /* Turn a howto into a reloc number */ static int coff_z8k_select_reloc (howto) reloc_howto_type *howto; { return howto->type; } #define SELECT_RELOC(x,howto) x.r_type = coff_z8k_select_reloc(howto) #define BADMAG(x) Z8KBADMAG(x) #define Z8K 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 (internal, dst) 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_da; break; case R_JR: internal->howto = &r_jr; break; case R_DISP7: internal->howto = &r_disp7; break; case R_CALLR: internal->howto = &r_callr; break; case R_REL16: internal->howto = &r_rel16; break; case R_IMM32: internal->howto = &r_imm32; break; case R_IMM4L: internal->howto = &r_imm4l; break; } } #define RTYPE2HOWTO(internal, relocentry) rtype2howto (internal, relocentry) /* 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 (relent, reloc, symbols, abfd, section) 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 (in_abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr) 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; switch (reloc->howto->type) { case R_IMM8: bfd_put_8 (in_abfd, bfd_coff_reloc16_get_value (reloc, link_info, input_section), data + *dst_ptr); (*dst_ptr) += 1; (*src_ptr) += 1; break; case R_IMM32: /* If no flags are set, assume immediate value. */ if (! (*reloc->sym_ptr_ptr)->section->flags) { bfd_put_32 (in_abfd, bfd_coff_reloc16_get_value (reloc, link_info, input_section), data + *dst_ptr); } else { bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info, input_section); /* Adresses are 23 bit, and the layout of those in a 32-bit value is as follows: 1AAAAAAA xxxxxxxx AAAAAAAA AAAAAAAA (A - address bits, x - ignore). */ dst = (dst & 0xffff) | ((dst & 0xff0000) << 8) | 0x80000000; bfd_put_32 (in_abfd, dst, data + *dst_ptr); } (*dst_ptr) += 4; (*src_ptr) += 4; break; case R_IMM4L: bfd_put_8 (in_abfd, ((bfd_get_8 (in_abfd, data + *dst_ptr) & 0xf0) | (0x0f & bfd_coff_reloc16_get_value (reloc, link_info, input_section))), data + *dst_ptr); (*dst_ptr) += 1; (*src_ptr) += 1; break; case R_IMM16: bfd_put_16 (in_abfd, bfd_coff_reloc16_get_value (reloc, link_info, input_section), data + *dst_ptr); (*dst_ptr) += 2; (*src_ptr) += 2; 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 we're in the odd byte of the word and the pc's been incremented. */ if (gap & 1) abort (); gap /= 2; if (gap > 128 || gap < -128) { if (! ((*link_info->callbacks->reloc_overflow) (link_info, 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; } case R_DISP7: { 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 we're in the odd byte of the word and the pc's been incremented. */ if (gap & 1) abort (); gap /= 2; if (gap > 0 || gap < -128) { if (! ((*link_info->callbacks->reloc_overflow) (link_info, 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, (bfd_get_8 ( in_abfd, data + *dst_ptr) & 0x80) + (-gap & 0x7f), data + *dst_ptr); (*dst_ptr)++; (*src_ptr)++; break; } case R_CALLR: { 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 - 2; if (gap & 1) abort (); gap /= 2; if (gap > 8191 || gap < -8192) { if (! ((*link_info->callbacks->reloc_overflow) (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr), reloc->howto->name, reloc->addend, input_section->owner, input_section, reloc->address))) abort (); } bfd_put_16 (in_abfd, (bfd_get_16 ( in_abfd, data + *dst_ptr) & 0xf000) | (-gap & 0x0fff), data + *dst_ptr); (*dst_ptr) += 2; (*src_ptr) += 2; break; } case R_REL16: { 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 - 2; if (gap > 32767 || gap < -32768) { if (! ((*link_info->callbacks->reloc_overflow) (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr), reloc->howto->name, reloc->addend, input_section->owner, input_section, reloc->address))) abort (); } bfd_put_16 (in_abfd, (bfd_vma) gap, data + *dst_ptr); (*dst_ptr) += 2; (*src_ptr) += 2; break; } default: abort (); } } #define coff_reloc16_extra_cases extra_case #include "coffcode.h" #undef coff_bfd_get_relocated_section_contents #undef coff_bfd_relax_section #define coff_bfd_get_relocated_section_contents \ bfd_coff_reloc16_get_relocated_section_contents #define coff_bfd_relax_section bfd_coff_reloc16_relax_section CREATE_BIG_COFF_TARGET_VEC (z8kcoff_vec, "coff-z8k", 0, 0, '_', NULL)