/* AMD 29000 COFF back-end for BFD. Copyright (C) 1990-1991 Free Software Foundation, Inc. Contributed by David Wood at New York University 7/8/91. 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. */ /* $Id$ */ #define A29K 1 #include "bfd.h" #include "sysdep.h" #include "libbfd.h" #include "obstack.h" #include "coff-a29k.h" #include "internalcoff.h" #include "libcoff.h" #define INSERT_HWORD(WORD,HWORD) \ (((WORD) & 0xff00ff00) | (((HWORD) & 0xff00) << 8) | ((HWORD)& 0xff)) #define EXTRACT_HWORD(WORD) \ (((WORD) & 0x00ff0000) >> 8) | ((WORD)& 0xff) #define SIGN_EXTEND_HWORD(HWORD) \ ((HWORD) & 0x8000 ? (HWORD)|0xffff0000 : (HWORD)) /* Provided the symbol, returns the value reffed */ static long get_symbol_value(symbol) asymbol *symbol; { long relocation = 0; if (symbol != (asymbol *)NULL) { if (symbol->flags & BSF_FORT_COMM) { relocation = 0; } else { relocation = symbol->value; } if (symbol->section != (asection *)NULL) { relocation += symbol->section->output_section->vma + symbol->section->output_offset; } } return(relocation); } /* this function is in charge of performing all the 29k relocations */ static bfd_reloc_status_type DEFUN(a29k_reloc,(abfd, reloc_entry, symbol_in, data, input_section), bfd *abfd AND arelent *reloc_entry AND asymbol *symbol_in AND unsigned char *data AND asection *input_section) { /* the consth relocation comes in two parts, we have to remember the state between calls, in these variables */ static boolean part1_consth_active = false; static unsigned long part1_consth_value; unsigned long insn; unsigned long sym_value; unsigned long unsigned_value; unsigned short r_type; long signed_value; r_type = reloc_entry->howto->type; /* FIXME: Do we need to check for partial linking here */ if (symbol_in && (symbol_in->flags & BSF_UNDEFINED)) { /* Keep the state machine happy in case we're called again */ if (r_type == R_IHIHALF) { part1_consth_active = true; part1_consth_value = 0; } return(bfd_reloc_undefined); } if ((part1_consth_active) && (r_type != R_IHCONST)) { fprintf(stderr,"Relocation problem : "); fprintf(stderr,"Missing IHCONST in module %s\n",abfd->filename); part1_consth_active = false; return(bfd_reloc_dangerous); } insn = bfd_get_32(abfd, data + reloc_entry->address); sym_value = get_symbol_value(symbol_in); switch (r_type) { case R_IREL: /* Take the value in the field and sign extend it */ signed_value = EXTRACT_HWORD(insn) << 2; signed_value = SIGN_EXTEND_HWORD(signed_value); signed_value += sym_value + reloc_entry->addend; if ((signed_value&~0x3ffff) == 0) { /* Absolute jmp/call */ insn |= (1<<24); /* Make it absolute */ /* FIXME: Should we change r_type to R_IABS */ signed_value /= 2; } else { /* Relative jmp/call, so subtract from the value the address of the place we're coming from */ signed_value -= reloc_entry->address + input_section->output_section->vma + input_section->output_offset; if (signed_value>0x1ffff || signed_value<-0x20000) return(bfd_reloc_outofrange); signed_value /= 2; } insn = INSERT_HWORD(insn, signed_value); break; case R_ILOHALF: unsigned_value = EXTRACT_HWORD(insn); unsigned_value += sym_value + reloc_entry->addend; insn = INSERT_HWORD(insn, unsigned_value); break; case R_IHIHALF: /* consth, part 1 Just get the symbol value that is referenced */ part1_consth_active = true; part1_consth_value = sym_value + reloc_entry->addend; /* Don't modify insn until R_IHCONST */ return(bfd_reloc_ok); break; case R_IHCONST: /* consth, part 2 Now relocate the reference */ if (part1_consth_active == false) { fprintf(stderr,"Relocation problem : "); fprintf(stderr,"IHIHALF missing in module %s\n", abfd->filename); return(bfd_reloc_dangerous); } /* sym_ptr_ptr = r_symndx, in coff_slurp_reloc_table() */ unsigned_value = 0; /*EXTRACT_HWORD(insn) << 16;*/ unsigned_value += reloc_entry->addend; /* r_symndx */ unsigned_value += part1_consth_value; unsigned_value = unsigned_value >> 16; insn = INSERT_HWORD(insn, unsigned_value); part1_consth_active = false; break; case R_BYTE: unsigned_value = (insn >> 24) + sym_value + reloc_entry->addend; if (unsigned_value & 0xffffff00) { fprintf(stderr,"Relocation problem : "); fprintf(stderr,"byte value too large in module %s\n", abfd->filename); return(bfd_reloc_overflow); } insn = (insn & 0x00ffffff) | (unsigned_value << 24); break; case R_HWORD: unsigned_value = (insn >> 16) + sym_value + reloc_entry->addend; if (unsigned_value & 0xffff0000) { fprintf(stderr,"Relocation problem : "); fprintf(stderr,"hword value too large in module %s\n", abfd->filename); return(bfd_reloc_overflow); } insn = (insn & 0x0000ffff) | (unsigned_value<<16); break; case R_WORD: insn += sym_value + reloc_entry->addend; break; default: fprintf(stderr,"Relocation problem : "); fprintf(stderr,"Unrecognized reloc type %d, in module %s\n", r_type,abfd->filename); return (bfd_reloc_dangerous); } bfd_put_32(abfd, insn, data+reloc_entry->address); return(bfd_reloc_ok); } /* type rightshift size bitsize pc-relative bitpos absolute complain_on_overflow special_function relocation name partial_inplace src_mask */ /*FIXME: I'm not real sure about this table */ #define NA 0 /* Obsolete fields, via the documentation */ static reloc_howto_type howto_table[] = { {R_ABS, 0, 3, NA, false, NA, NA, true,a29k_reloc,"ABS", true, 0xffffffff,0xffffffff, false}, {1}, {2}, {3}, {4}, {5}, {6}, {7}, {8}, {9}, {10}, {11}, {12}, {13}, {14}, {15}, {16}, {17}, {18}, {19}, {20}, {21}, {22}, {23}, {R_IREL, 0, 3, NA, true, NA, NA, true,a29k_reloc,"IREL", true, 0xffffffff,0xffffffff, false}, {R_IABS, 0, 3, NA, false, NA, NA, true,a29k_reloc,"IABS", true, 0xffffffff,0xffffffff, false}, {R_ILOHALF, 0, 3, NA, true, NA, NA, true,a29k_reloc,"ILOHALF", true, 0x0000ffff,0x0000ffff, false}, {R_IHIHALF, 0, 3, NA, true, NA, NA, true,a29k_reloc,"IHIHALF", true, 0xffff0000,0xffff0000, false}, {R_IHCONST, 0, 3, NA, true, NA, NA, true,a29k_reloc,"IHCONST", true, 0xffff0000,0xffff0000, false}, {R_BYTE, 0, 0, NA, false, NA, NA, true,a29k_reloc,"BYTE", true, 0x000000ff,0x000000ff, false}, {R_HWORD, 0, 1, NA, false, NA, NA, true,a29k_reloc,"HWORD", true, 0x0000ffff,0x0000ffff, false}, {R_WORD, 0, 2, NA, false, NA, NA, true,a29k_reloc,"WORD", true, 0xffffffff,0xffffffff, false}, }; #undef NA #define BADMAG(x) A29KBADMAG(x) #include "coffcode.h" bfd_target a29kcoff_big_vec = { "coff-a29k-big", /* 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 /* section flags */ | SEC_LOAD | SEC_RELOC | SEC_READONLY ), '/', /* ar_pad_char */ 15, /* ar_max_namelen */ 2, /* minimum section alignment */ /* data */ _do_getb64, _do_putb64, _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* hdrs */ _do_getb64, _do_putb64, _do_getb32, _do_putb32, _do_getb16, _do_putb16, { _bfd_dummy_target, coff_object_p, bfd_generic_archive_p, _bfd_dummy_target }, { bfd_false, coff_mkobject, _bfd_generic_mkarchive, bfd_false }, { bfd_false, coff_write_object_contents, _bfd_write_archive_contents, bfd_false }, JUMP_TABLE(coff), COFF_SWAP_TABLE };