/* BFD back-end for Hitachi H8/300 COFF binaries. Copyright 1990, 1991, 1992, 1993 Free Software Foundation, Inc. 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include "bfd.h" #include "sysdep.h" #include "libbfd.h" #include "obstack.h" #include "coff/h8300.h" #include "coff/internal.h" #include "seclet.h" #include "libcoff.h" extern bfd_error_vector_type bfd_error_vector; static reloc_howto_type howto_table[] = { HOWTO (R_RELBYTE, 0, 0, 8, false, 0, complain_overflow_bitfield, 0, "8", true, 0x000000ff, 0x000000ff, false), HOWTO (R_RELWORD, 0, 1, 16, false, 0, complain_overflow_bitfield, 0, "16", true, 0x0000ffff, 0x0000ffff, false), HOWTO (R_RELLONG, 0, 2, 32, false, 0, complain_overflow_bitfield, 0, "32", true, 0xffffffff, 0xffffffff, false), HOWTO (R_PCRBYTE, 0, 0, 8, true, 0, complain_overflow_signed, 0, "DISP8", true, 0x000000ff, 0x000000ff, true), HOWTO (R_PCRWORD, 0, 1, 16, true, 0, complain_overflow_signed, 0, "DISP16", true, 0x0000ffff, 0x0000ffff, true), HOWTO (R_PCRLONG, 0, 2, 32, true, 0, complain_overflow_signed, 0, "DISP32", true, 0xffffffff, 0xffffffff, true), HOWTO (R_MOVB1, 0, 1, 16, false, 0, complain_overflow_bitfield, 0, "16/8", true, 0x0000ffff, 0x0000ffff, false), HOWTO (R_MOVB2, 0, 1, 16, false, 0, complain_overflow_bitfield, 0, "8/16", true, 0x0000ffff, 0x0000ffff, false), HOWTO (R_JMP1, 0, 1, 16, false, 0, complain_overflow_bitfield, 0, "16/pcrel", true, 0x0000ffff, 0x0000ffff, false), HOWTO (R_JMP2, 0, 0, 8, false, 0, complain_overflow_bitfield, 0, "pcrecl/16", true, 0x000000ff, 0x000000ff, false), HOWTO (R_JMPL1, 0, 1, 32, false, 0, complain_overflow_bitfield, 0, "24/pcrell", true, 0x0000ffff, 0x0000ffff, false), HOWTO (R_JMPL_B8, 0, 0, 8, false, 0, complain_overflow_bitfield, 0, "pc8/24", true, 0x000000ff, 0x000000ff, false), HOWTO (R_MOVLB1, 0, 1, 16, false, 0, complain_overflow_bitfield, 0, "24/8", true, 0x0000ffff, 0x0000ffff, false), HOWTO (R_MOVLB2, 0, 1, 16, false, 0, complain_overflow_bitfield, 0, "8/24", true, 0x0000ffff, 0x0000ffff, false), }; /* Turn a howto into a reloc number */ #define SELECT_RELOC(x,howto) \ { x = select_reloc(howto); } #define BADMAG(x) (H8300BADMAG(x)&& H8300HBADMAG(x)) #define H8300 1 /* Customize coffcode.h */ #define __A_MAGIC_SET__ /* Code to swap in the reloc */ #define SWAP_IN_RELOC_OFFSET bfd_h_get_32 #define SWAP_OUT_RELOC_OFFSET bfd_h_put_32 #define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \ dst->r_stuff[0] = 'S'; \ dst->r_stuff[1] = 'C'; static int select_reloc (howto) reloc_howto_type *howto; { return howto->type; } /* 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) { case R_RELBYTE: internal->howto = howto_table + 0; break; case R_RELWORD: internal->howto = howto_table + 1; break; case R_RELLONG: internal->howto = howto_table + 2; break; case R_PCRBYTE: internal->howto = howto_table + 3; break; case R_PCRWORD: internal->howto = howto_table + 4; break; case R_PCRLONG: internal->howto = howto_table + 5; break; case R_MOVB1: internal->howto = howto_table + 6; break; case R_MOVB2: internal->howto = howto_table + 7; break; case R_JMP1: internal->howto = howto_table + 8; break; case R_JMP2: internal->howto = howto_table + 9; break; case R_JMPL1: internal->howto = howto_table + 10; break; case R_JMPL_B8: internal->howto = howto_table + 11; break; case R_MOVLB1: internal->howto = howto_table + 12; break; case R_MOVLB2: internal->howto = howto_table + 13; break; default: fprintf (stderr, "Bad reloc\n"); break; } } #define RTYPE2HOWTO(internal, relocentry) rtype2howto(internal,relocentry) /* Perform any necessaru 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 DEFUN (reloc_processing, (relent, reloc, symbols, abfd, section), arelent * relent AND struct internal_reloc *reloc AND asymbol ** symbols AND bfd * abfd AND asection * section) { relent->address = reloc->r_vaddr; rtype2howto (relent, reloc); if (((int) reloc->r_symndx) > 0) { relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx]; } else { relent->sym_ptr_ptr = &(bfd_abs_symbol); } relent->addend = reloc->r_offset; relent->address -= section->vma; /* relent->section = 0;*/ } static int h8300_reloc16_estimate(input_section, symbols, reloc, shrink) asection *input_section; asymbol **symbols; arelent *reloc; unsigned int shrink; { bfd_vma value; bfd_vma dot; bfd_vma gap; /* The address of the thing to be relocated will have moved back by the size of the shrink - but we don't change reloc->address here, since we need it to know where the relocation lives in the source uncooked section */ /* reloc->address -= shrink; conceptual */ bfd_vma address = reloc->address - shrink; switch (reloc->howto->type) { case R_MOVB2: case R_JMP2: shrink+=2; break; /* Thing is a move one byte */ case R_MOVB1: value = bfd_coff_reloc16_get_value(reloc,0); if (value >= 0xff00) { /* Change the reloc type from 16bit, possible 8 to 8bit possible 16 */ reloc->howto = reloc->howto + 1; /* The place to relc moves back by one */ /* This will be two bytes smaller in the long run */ shrink +=2 ; bfd_perform_slip(symbols, 2, input_section, address); } break; /* This is the 24 bit branch which could become an 8 bitter, the relocation points to the first byte of the insn, not the actual data */ case R_JMPL1: value = bfd_coff_reloc16_get_value(reloc, 0); dot = input_section->output_section->vma + input_section->output_offset + address; /* See if the address we're looking at within 127 bytes of where we are, if so then we can use a small branch rather than the jump we were going to */ gap = value - dot ; if (-120 < (long)gap && (long)gap < 120 ) { /* Change the reloc type from 24bit, possible 8 to 8bit possible 32 */ reloc->howto = reloc->howto + 1; /* This will be two bytes smaller in the long run */ shrink +=2 ; bfd_perform_slip(symbols, 2, input_section, address); } break; case R_JMP1: value = bfd_coff_reloc16_get_value(reloc, 0); dot = input_section->output_section->vma + input_section->output_offset + address; /* See if the address we're looking at within 127 bytes of where we are, if so then we can use a small branch rather than the jump we were going to */ gap = value - (dot - shrink); if (-120 < (long)gap && (long)gap < 120 ) { /* Change the reloc type from 16bit, possible 8 to 8bit possible 16 */ reloc->howto = reloc->howto + 1; /* The place to relc moves back by one */ /* This will be two bytes smaller in the long run */ shrink +=2 ; bfd_perform_slip(symbols, 2, input_section, address); } break; } return shrink; } /* First phase of a relaxing link */ /* Reloc types large small R_MOVB1 R_MOVB2 mov.b with 16bit or 8 bit address R_JMP1 R_JMP2 jmp or pcrel branch R_JMPL1 R_JMPL_B8 24jmp or pcrel branch R_MOVLB1 R_MOVLB2 24 or 8 bit reloc for mov.b */ static void h8300_reloc16_extra_cases (abfd, seclet, reloc, data, src_ptr, dst_ptr) bfd *abfd; struct bfd_seclet *seclet; arelent *reloc; bfd_byte *data; unsigned int *src_ptr; unsigned int *dst_ptr; { unsigned int src_address = *src_ptr; unsigned int dst_address = *dst_ptr; switch (reloc->howto->type) { /* A 24 bit branch which could be a 8 bit pcrel, really pointing to the byte before the 24bit hole, so we can treat it as a 32bit pointer */ case R_PCRBYTE: { bfd_vma dot = seclet->offset + dst_address + seclet->u.indirect.section->output_section->vma; int gap = bfd_coff_reloc16_get_value (reloc, seclet) - dot; if (gap > 127 || gap < -128) { bfd_error_vector.reloc_value_truncated (reloc, seclet); } bfd_put_8 (abfd, gap, data + dst_address); dst_address++; src_address++; break; } case R_RELBYTE: { unsigned int gap = bfd_coff_reloc16_get_value (reloc, seclet); if (gap > 0xff && gap < ~0xff) { bfd_error_vector.reloc_value_truncated (reloc, seclet); } bfd_put_8 (abfd, gap, data + dst_address); dst_address += 1; src_address += 1; } break; case R_JMP1: /* A relword which would have like to have been a pcrel */ case R_MOVB1: /* A relword which would like to have been modified but didn't make it */ case R_RELWORD: bfd_put_16 (abfd, bfd_coff_reloc16_get_value (reloc, seclet), data + dst_address); dst_address += 2; src_address += 2; break; case R_RELLONG: bfd_put_32 (abfd, bfd_coff_reloc16_get_value (reloc, seclet), data + dst_address); dst_address += 4; src_address += 4; break; case R_MOVB2: /* Special relaxed type, there will be a gap between where we get stuff from and where we put stuff to now for a mov.b @aa:16 -> mov.b @aa:8 opcode 0x6a 0x0y offset -> 0x2y off */ if (data[dst_address - 1] != 0x6a) abort (); switch (data[src_address] & 0xf0) { case 0x00: /* Src is memory */ data[dst_address - 1] = (data[src_address] & 0xf) | 0x20; break; case 0x80: /* Src is reg */ data[dst_address - 1] = (data[src_address] & 0xf) | 0x30; break; default: abort (); } /* the offset must fit ! after all, what was all the relaxing about ? */ bfd_put_8 (abfd, bfd_coff_reloc16_get_value (reloc, seclet), data + dst_address); /* Note the magic - src goes up by two bytes, but dst by only one */ dst_address += 1; src_address += 3; break; case R_JMP2: /* Speciial relaxed type */ { bfd_vma dot = seclet->offset + dst_address + seclet->u.indirect.section->output_section->vma; int gap = bfd_coff_reloc16_get_value (reloc, seclet) - dot - 1; if ((gap & ~0xff) != 0 && ((gap & 0xff00) != 0xff00)) abort (); bfd_put_8 (abfd, gap, data + dst_address); switch (data[dst_address - 1]) { case 0x5e: /* jsr -> bsr */ bfd_put_8 (abfd, 0x55, data + dst_address - 1); break; case 0x5a: /* jmp ->bra */ bfd_put_8 (abfd, 0x40, data + dst_address - 1); break; default: abort (); } dst_address++; src_address += 3; break; } break; case R_JMPL_B8: /* 24 bit branch which is now 8 bits */ /* Speciial relaxed type */ { bfd_vma dot = seclet->offset + dst_address + seclet->u.indirect.section->output_section->vma; int gap = bfd_coff_reloc16_get_value (reloc, seclet) - dot - 2; if ((gap & ~0xff) != 0 && ((gap & 0xff00) != 0xff00)) abort (); switch (data[src_address]) { case 0x5e: /* jsr -> bsr */ bfd_put_8 (abfd, 0x55, data + dst_address); break; case 0x5a: /* jmp ->bra */ bfd_put_8 (abfd, 0x40, data + dst_address); break; default: bfd_put_8 (abfd, 0xde, data + dst_address); break; } bfd_put_8 (abfd, gap, data + dst_address + 1); dst_address += 2; src_address += 4; break; } case R_JMPL1: { int v = bfd_coff_reloc16_get_value (reloc, seclet); int o = bfd_get_32 (abfd, data + src_address); v = (v & 0x00ffffff) | (o & 0xff000000); bfd_put_32 (abfd, v, data + dst_address); dst_address += 4; src_address += 4; } break; /* A 24 bit mov which could be an 8 bit move, really pointing to the byte before the 24bit hole, so we can treat it as a 32bit pointer */ case R_MOVLB1: { int v = bfd_coff_reloc16_get_value (reloc, seclet); int o = bfd_get_32 (abfd, data + dst_address); v = (v & 0x00ffffff) | (o & 0xff000000); bfd_put_32 (abfd, v, data + dst_address); dst_address += 4; src_address += 4; } break; default: abort (); break; } *src_ptr = src_address; *dst_ptr = dst_address; } #define coff_reloc16_extra_cases h8300_reloc16_extra_cases #define coff_reloc16_estimate h8300_reloc16_estimate #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 bfd_target h8300coff_vec = { "coff-h8300", /* name */ bfd_target_coff_flavour, true, /* data byte order is big */ true, /* header byte order is big */ (HAS_RELOC | EXEC_P | /* object flags */ HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT), (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ '_', /* leading char */ '/', /* ar_pad_char */ 15, /* ar_max_namelen */ 1, /* minimum section alignment */ bfd_getb64, bfd_getb_signed_64, bfd_putb64, bfd_getb32, bfd_getb_signed_32, bfd_putb32, bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */ bfd_getb64, bfd_getb_signed_64, bfd_putb64, bfd_getb32, bfd_getb_signed_32, bfd_putb32, bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */ {_bfd_dummy_target, coff_object_p, /* bfd_check_format */ bfd_generic_archive_p, _bfd_dummy_target}, {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */ bfd_false}, {bfd_false, coff_write_object_contents, /* bfd_write_contents */ _bfd_write_archive_contents, bfd_false}, JUMP_TABLE (coff), COFF_SWAP_TABLE, };