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/* BFD back-end for OpenRISC 1000 COFF binaries. Copyright 1990, 91, 92, 93, 94, 95, 1997 Free Software Foundation, Inc. Contributed by David Wood at New York University 7/8/91. Modified by Johan Rydberg, <johan.rydberg@netinsight.se> 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. */ #define OR32 1 #include "bfd.h" #include "sysdep.h" #include "libbfd.h" #include "coff/or1k.h" #include "coff/internal.h" #include "libcoff.h" static long get_symbol_value PARAMS ((asymbol *)); static bfd_reloc_status_type or1_reloc PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); static boolean coff_or1_relocate_section PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, struct internal_reloc *, struct internal_syment *, asection **)); static boolean coff_or1_adjust_symndx PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, struct internal_reloc *, boolean *)); #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2) #define INSERT_HWORD(WORD,HWORD) \ (((WORD) & 0xffff0000) | ((HWORD)& 0x0000ffff)) #define EXTRACT_HWORD(WORD) \ ((WORD) & 0x0000ffff) #define SIGN_EXTEND_HWORD(HWORD) \ ((HWORD) & 0x8000 ? (HWORD)|(~0xffffL) : (HWORD)) #define INSERT_JUMPTARG(WORD,JT) \ (((WORD) & 0xfc000000) | ((JT)& 0x03ffffff)) #define EXTRACT_JUMPTARG(WORD) \ ((WORD) & 0x03ffffff) #define SIGN_EXTEND_JUMPTARG(JT) \ ((JT) & 0x04000000 ? (JT)|(~0x03ffffffL) : (JT)) /* Provided the symbol, returns the value reffed. */ static long get_symbol_value (symbol) asymbol *symbol; { long relocation = 0; if (bfd_is_com_section (symbol->section)) { relocation = 0; } else { relocation = symbol->value + symbol->section->output_section->vma + symbol->section->output_offset; } return(relocation); } /* This function is in charge of performing all the or32 relocations. */ static bfd_reloc_status_type or32_reloc (abfd, reloc_entry, symbol_in, data, input_section, output_bfd, error_message) bfd *abfd; arelent *reloc_entry; asymbol *symbol_in; PTR data; asection *input_section; bfd *output_bfd; char **error_message; { /* 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; unsigned long addr = reloc_entry->address ; /*+ input_section->vma*/ bfd_byte *hit_data =addr + (bfd_byte *)(data); r_type = reloc_entry->howto->type; if (output_bfd) { /* Partial linking - do nothing */ reloc_entry->address += input_section->output_offset; return bfd_reloc_ok; } if (symbol_in != NULL && bfd_is_und_section (symbol_in->section)) { /* 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)) { part1_consth_active = false; *error_message = (char *) "Missing IHCONST"; return(bfd_reloc_dangerous); } sym_value = get_symbol_value(symbol_in); switch (r_type) { case R_IREL: insn = bfd_get_32(abfd, hit_data); /* Take the value in the field and sign extend it. */ signed_value = EXTRACT_JUMPTARG(insn); signed_value = SIGN_EXTEND_JUMPTARG(signed_value); signed_value <<= 2; /* See the note on the R_IREL reloc in coff_or32_relocate_section. */ if (signed_value == - (long) reloc_entry->address) signed_value = 0; signed_value += sym_value + reloc_entry->addend; #if 0 if ((signed_value & ~0x3ffff) == 0) { /* Absolute jmp/call */ insn |= (1<<24); /* Make it absolute */ /* FIXME: Should we change r_type to R_IABS */ } else #endif { /* 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>0x7ffffff || signed_value<-0x8000000) return(bfd_reloc_overflow); } signed_value >>= 2; insn = INSERT_JUMPTARG(insn, signed_value); bfd_put_32(abfd, insn ,hit_data); break; case R_ILOHALF: insn = bfd_get_32(abfd, hit_data); unsigned_value = EXTRACT_HWORD(insn); unsigned_value += sym_value + reloc_entry->addend; insn = INSERT_HWORD(insn, unsigned_value); bfd_put_32(abfd, insn, hit_data); break; case R_IHIHALF: insn = bfd_get_32(abfd, hit_data); /* 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 */ break; case R_IHCONST: insn = bfd_get_32(abfd, hit_data); /* consth, part 2 Now relocate the reference */ if (part1_consth_active == false) { *error_message = (char *) "Missing IHIHALF"; 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; bfd_put_32(abfd, insn, hit_data); break; case R_BYTE: insn = bfd_get_8(abfd, hit_data); unsigned_value = insn + sym_value + reloc_entry->addend; if (unsigned_value & 0xffffff00) return(bfd_reloc_overflow); bfd_put_8(abfd, unsigned_value, hit_data); break; case R_HWORD: insn = bfd_get_16(abfd, hit_data); unsigned_value = insn + sym_value + reloc_entry->addend; if (unsigned_value & 0xffff0000) return(bfd_reloc_overflow); bfd_put_16(abfd, insn, hit_data); break; case R_WORD: insn = bfd_get_32(abfd, hit_data); insn += sym_value + reloc_entry->addend; bfd_put_32(abfd, insn, hit_data); break; default: *error_message = "Unrecognized reloc"; return (bfd_reloc_dangerous); } 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; */ static reloc_howto_type howto_table[] = { { R_ABS, 0, 3, 32, false, 0, complain_overflow_bitfield, or32_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, 32, true, 0, complain_overflow_signed, or32_reloc, "IREL", true, 0xffffffff,0xffffffff, false }, { R_IABS, 0, 3, 32, false, 0, complain_overflow_bitfield, or32_reloc, "IABS", true, 0xffffffff,0xffffffff, false }, { R_ILOHALF, 0, 3, 16, true, 0, complain_overflow_signed, or32_reloc, "ILOHALF", true, 0x0000ffff,0x0000ffff, false }, { R_IHIHALF, 0, 3, 16, true, 16,complain_overflow_signed, or32_reloc, "IHIHALF", true, 0xffff0000,0xffff0000, false }, { R_IHCONST, 0, 3, 16, true, 0, complain_overflow_signed, or32_reloc, "IHCONST", true, 0xffff0000,0xffff0000, false }, { R_BYTE, 0, 0, 8, false, 0, complain_overflow_bitfield, or32_reloc, "BYTE", true, 0x000000ff,0x000000ff, false }, { R_HWORD, 0, 1, 16, false, 0, complain_overflow_bitfield, or32_reloc, "HWORD", true, 0x0000ffff,0x0000ffff, false }, { R_WORD, 0, 2, 32, false, 0, complain_overflow_bitfield, or32_reloc, "WORD", true, 0xffffffff,0xffffffff, false }, }; #define BADMAG(x) OR32BADMAG(x) #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; { static bfd_vma ihihalf_vaddr = (bfd_vma) -1; relent->address = reloc->r_vaddr; relent->howto = howto_table + reloc->r_type; if (reloc->r_type == R_IHCONST) { /* The address of an R_IHCONST should always be the address of the immediately preceding R_IHIHALF. relocs generated by gas are correct, but relocs generated by High C are different (I can't figure out what the address means for High C). We can handle both gas and High C by ignoring the address here, and simply reusing the address saved for R_IHIHALF. */ if (ihihalf_vaddr == (bfd_vma) -1) abort (); relent->address = ihihalf_vaddr; ihihalf_vaddr = (bfd_vma) -1; relent->addend = reloc->r_symndx; relent->sym_ptr_ptr= bfd_abs_section_ptr->symbol_ptr_ptr; } else { asymbol *ptr; relent->sym_ptr_ptr = symbols + obj_convert(abfd)[reloc->r_symndx]; ptr = *(relent->sym_ptr_ptr); if (ptr && bfd_asymbol_bfd(ptr) == abfd && ((ptr->flags & BSF_OLD_COMMON)== 0)) { relent->addend = 0; } else { relent->addend = 0; } relent->address-= section->vma; if (reloc->r_type == R_IHIHALF) ihihalf_vaddr = relent->address; else if (ihihalf_vaddr != (bfd_vma) -1) abort (); } } /* The reloc processing routine for the optimized COFF linker: */ static boolean coff_or32_relocate_section (output_bfd, info, input_bfd, input_section, contents, relocs, syms, sections) bfd *output_bfd; struct bfd_link_info *info; bfd *input_bfd; asection *input_section; bfd_byte *contents; struct internal_reloc *relocs; struct internal_syment *syms; asection **sections; { struct internal_reloc *rel; struct internal_reloc *relend; boolean hihalf; bfd_vma hihalf_val; /* If we are performing a relocateable link, we don't need to do a thing. The caller will take care of adjusting the reloc addresses and symbol indices. */ if (info->relocateable) return true; hihalf = false; hihalf_val = 0; rel = relocs; relend = rel + input_section->reloc_count; for (; rel < relend; rel++) { long symndx; bfd_byte *loc; struct coff_link_hash_entry *h; struct internal_syment *sym; asection *sec; bfd_vma val; boolean overflow; unsigned long insn; long signed_value; unsigned long unsigned_value; bfd_reloc_status_type rstat; symndx = rel->r_symndx; loc = contents + rel->r_vaddr - input_section->vma; if (symndx == -1 || rel->r_type == R_IHCONST) h = NULL; else h = obj_coff_sym_hashes (input_bfd)[symndx]; sym = NULL; sec = NULL; val = 0; /* An R_IHCONST reloc does not have a symbol. Instead, the symbol index is an addend. R_IHCONST is always used in conjunction with R_IHHALF. */ if (rel->r_type != R_IHCONST) { if (h == NULL) { if (symndx == -1) sec = bfd_abs_section_ptr; else { sym = syms + symndx; sec = sections[symndx]; val = (sec->output_section->vma + sec->output_offset + sym->n_value - sec->vma); } } else { if (h->root.type == bfd_link_hash_defined || h->root.type == bfd_link_hash_defweak) { sec = h->root.u.def.section; val = (h->root.u.def.value + sec->output_section->vma + sec->output_offset); } else { if (! ((*info->callbacks->undefined_symbol) (info, h->root.root.string, input_bfd, input_section, rel->r_vaddr - input_section->vma, true))) return false; } } if (hihalf) { if (! ((*info->callbacks->reloc_dangerous) (info, "missing IHCONST reloc", input_bfd, input_section, rel->r_vaddr - input_section->vma))) return false; hihalf = false; } } overflow = false; switch (rel->r_type) { default: bfd_set_error (bfd_error_bad_value); return false; case R_IREL: insn = bfd_get_32 (input_bfd, loc); /* Extract the addend. */ signed_value = EXTRACT_JUMPTARG (insn); signed_value = SIGN_EXTEND_JUMPTARG (signed_value); signed_value <<= 2; /* Determine the destination of the jump. */ signed_value += val; #if 0 if ((signed_value & ~0x3ffff) == 0) { /* We can use an absolute jump. */ insn |= (1 << 24); } else #endif { /* Make the destination PC relative. */ signed_value -= (input_section->output_section->vma + input_section->output_offset + (rel->r_vaddr - input_section->vma)); if (signed_value > 0x7ffffff || signed_value < - 0x8000000) { overflow = true; signed_value = 0; } } /* Put the adjusted value back into the instruction. */ signed_value >>= 2; insn = INSERT_JUMPTARG(insn, signed_value); bfd_put_32 (input_bfd, (bfd_vma) insn, loc); break; case R_ILOHALF: insn = bfd_get_32 (input_bfd, loc); unsigned_value = EXTRACT_HWORD (insn); unsigned_value += val; insn = INSERT_HWORD (insn, unsigned_value); bfd_put_32 (input_bfd, insn, loc); break; case R_IHIHALF: /* Save the value for the R_IHCONST reloc. */ hihalf = true; hihalf_val = val; break; case R_IHCONST: if (! hihalf) { if (! ((*info->callbacks->reloc_dangerous) (info, "missing IHIHALF reloc", input_bfd, input_section, rel->r_vaddr - input_section->vma))) return false; hihalf_val = 0; } insn = bfd_get_32 (input_bfd, loc); unsigned_value = rel->r_symndx + hihalf_val; unsigned_value >>= 16; insn = INSERT_HWORD (insn, unsigned_value); bfd_put_32 (input_bfd, (bfd_vma) insn, loc); hihalf = false; break; case R_BYTE: case R_HWORD: case R_WORD: rstat = _bfd_relocate_contents (howto_table + rel->r_type, input_bfd, val, loc); if (rstat == bfd_reloc_overflow) overflow = true; else if (rstat != bfd_reloc_ok) abort (); break; } if (overflow) { const char *name; char buf[SYMNMLEN + 1]; if (symndx == -1) name = "*ABS*"; else if (h != NULL) name = h->root.root.string; else if (sym == NULL) name = "*unknown*"; else if (sym->_n._n_n._n_zeroes == 0 && sym->_n._n_n._n_offset != 0) name = obj_coff_strings (input_bfd) + sym->_n._n_n._n_offset; else { strncpy (buf, sym->_n._n_name, SYMNMLEN); buf[SYMNMLEN] = '\0'; name = buf; } if (! ((*info->callbacks->reloc_overflow) (info, name, howto_table[rel->r_type].name, (bfd_vma) 0, input_bfd, input_section, rel->r_vaddr - input_section->vma))) return false; } } return true; } #define coff_relocate_section coff_or32_relocate_section /* We don't want to change the symndx of a R_IHCONST reloc, since it is actually an addend, not a symbol index at all. */ /*ARGSUSED*/ static boolean coff_or32_adjust_symndx (obfd, info, ibfd, sec, irel, adjustedp) bfd *obfd; struct bfd_link_info *info; bfd *ibfd; asection *sec; struct internal_reloc *irel; boolean *adjustedp; { if (irel->r_type == R_IHCONST) *adjustedp = true; else *adjustedp = false; return true; } #define coff_adjust_symndx coff_or32_adjust_symndx #include "coffcode.h" const bfd_target or32coff_big_vec = { "coff-or32-big", /* name */ bfd_target_coff_flavour, BFD_ENDIAN_BIG, /* data byte order is big */ BFD_ENDIAN_BIG, /* header byte order is big */ (HAS_RELOC | EXEC_P | /* object flags */ HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS | WP_TEXT), (SEC_HAS_CONTENTS | SEC_ALLOC | /* section flags */ SEC_LOAD | SEC_RELOC | SEC_READONLY ), '_', /* leading underscore */ '/', /* ar_pad_char */ 15, /* ar_max_namelen */ /* 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_getb64, bfd_getb_signed_64, bfd_putb64, bfd_getb32, bfd_getb_signed_32, bfd_putb32, bfd_getb16, bfd_getb_signed_16, bfd_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 }, BFD_JUMP_TABLE_GENERIC (coff), BFD_JUMP_TABLE_COPY (coff), BFD_JUMP_TABLE_CORE (_bfd_nocore), BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), BFD_JUMP_TABLE_SYMBOLS (coff), BFD_JUMP_TABLE_RELOCS (coff), BFD_JUMP_TABLE_WRITE (coff), BFD_JUMP_TABLE_LINK (coff), BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), /* Alternative_target. */ #ifdef TARGET_LITTLE_SYM & TARGET_LITTLE_SYM, #else NULL, #endif COFF_SWAP_TABLE };