diff options
Diffstat (limited to 'bfd/coff-m68k.c')
| -rw-r--r-- | bfd/coff-m68k.c | 531 |
1 files changed, 0 insertions, 531 deletions
diff --git a/bfd/coff-m68k.c b/bfd/coff-m68k.c deleted file mode 100644 index b7f235c810b..00000000000 --- a/bfd/coff-m68k.c +++ /dev/null @@ -1,531 +0,0 @@ -/* BFD back-end for Motorola 68000 COFF binaries. - Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1999, 2000 - Free Software Foundation, Inc. - Written by Cygnus Support. - -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 "coff/m68k.h" -#include "coff/internal.h" -#include "libcoff.h" - -/* This source file is compiled multiple times for various m68k COFF - variants. The following macros control its behaviour: - - TARGET_SYM - The C name of the BFD target vector. The default is m68kcoff_vec. - TARGET_NAME - The user visible target name. The default is "coff-m68k". - NAMES_HAVE_UNDERSCORE - Whether symbol names have an underscore. - ONLY_DECLARE_RELOCS - Only declare the relocation howto array. Don't actually compile - it. The actual array will be picked up in another version of the - file. - STATIC_RELOCS - Make the relocation howto array, and associated functions, static. - COFF_COMMON_ADDEND - If this is defined, then, for a relocation against a common - symbol, the object file holds the value (the size) of the common - symbol. If this is not defined, then, for a relocation against a - common symbol, the object file holds zero. */ - -#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2) - -#ifndef COFF_PAGE_SIZE -/* The page size is a guess based on ELF. */ -#define COFF_PAGE_SIZE 0x2000 -#endif - -#ifndef COFF_COMMON_ADDEND -#define RELOC_SPECIAL_FN 0 -#else -static bfd_reloc_status_type m68kcoff_common_addend_special_fn - PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); -static reloc_howto_type *m68kcoff_common_addend_rtype_to_howto - PARAMS ((bfd *, asection *, struct internal_reloc *, - struct coff_link_hash_entry *, struct internal_syment *, - bfd_vma *)); -#define RELOC_SPECIAL_FN m68kcoff_common_addend_special_fn -#endif - -static boolean m68k_coff_is_local_label_name PARAMS ((bfd *, const char *)); - -/* On the delta, a symbol starting with L% is local. We won't see - such a symbol on other platforms, so it should be safe to always - consider it local here. */ - -static boolean -m68k_coff_is_local_label_name (abfd, name) - bfd *abfd; - const char *name; -{ - if (name[0] == 'L' && name[1] == '%') - return true; - - return _bfd_coff_is_local_label_name (abfd, name); -} - -#ifndef STATIC_RELOCS -/* Clean up namespace. */ -#define m68kcoff_howto_table _bfd_m68kcoff_howto_table -#define m68k_rtype2howto _bfd_m68kcoff_rtype2howto -#define m68k_howto2rtype _bfd_m68kcoff_howto2rtype -#define m68k_reloc_type_lookup _bfd_m68kcoff_reloc_type_lookup -#endif - -#ifdef ONLY_DECLARE_RELOCS -extern reloc_howto_type m68kcoff_howto_table[]; -#else -#ifdef STATIC_RELOCS -static -#endif -reloc_howto_type m68kcoff_howto_table[] = -{ - HOWTO(R_RELBYTE, 0, 0, 8, false, 0, complain_overflow_bitfield, RELOC_SPECIAL_FN, "8", true, 0x000000ff,0x000000ff, false), - HOWTO(R_RELWORD, 0, 1, 16, false, 0, complain_overflow_bitfield, RELOC_SPECIAL_FN, "16", true, 0x0000ffff,0x0000ffff, false), - HOWTO(R_RELLONG, 0, 2, 32, false, 0, complain_overflow_bitfield, RELOC_SPECIAL_FN, "32", true, 0xffffffff,0xffffffff, false), - HOWTO(R_PCRBYTE, 0, 0, 8, true, 0, complain_overflow_signed, RELOC_SPECIAL_FN, "DISP8", true, 0x000000ff,0x000000ff, false), - HOWTO(R_PCRWORD, 0, 1, 16, true, 0, complain_overflow_signed, RELOC_SPECIAL_FN, "DISP16", true, 0x0000ffff,0x0000ffff, false), - HOWTO(R_PCRLONG, 0, 2, 32, true, 0, complain_overflow_signed, RELOC_SPECIAL_FN, "DISP32", true, 0xffffffff,0xffffffff, false), - HOWTO(R_RELLONG_NEG, 0, -2, 32, false, 0, complain_overflow_bitfield, RELOC_SPECIAL_FN, "-32", true, 0xffffffff,0xffffffff, false), -}; -#endif /* not ONLY_DECLARE_RELOCS */ - -#ifndef BADMAG -#define BADMAG(x) M68KBADMAG(x) -#endif -#define M68 1 /* Customize coffcode.h */ - -/* Turn a howto into a reloc number */ - -#ifdef ONLY_DECLARE_RELOCS -extern void m68k_rtype2howto PARAMS ((arelent *internal, int relocentry)); -extern int m68k_howto2rtype PARAMS ((reloc_howto_type *)); -extern reloc_howto_type *m68k_reloc_type_lookup - PARAMS ((bfd *, bfd_reloc_code_real_type)); -#else -#ifdef STATIC_RELOCS -static -#endif -void -m68k_rtype2howto(internal, relocentry) - arelent *internal; - int relocentry; -{ - switch (relocentry) - { - case R_RELBYTE: internal->howto = m68kcoff_howto_table + 0; break; - case R_RELWORD: internal->howto = m68kcoff_howto_table + 1; break; - case R_RELLONG: internal->howto = m68kcoff_howto_table + 2; break; - case R_PCRBYTE: internal->howto = m68kcoff_howto_table + 3; break; - case R_PCRWORD: internal->howto = m68kcoff_howto_table + 4; break; - case R_PCRLONG: internal->howto = m68kcoff_howto_table + 5; break; - case R_RELLONG_NEG: internal->howto = m68kcoff_howto_table + 6; break; - } -} - -#ifdef STATIC_RELOCS -static -#endif -int -m68k_howto2rtype (internal) - reloc_howto_type *internal; -{ - if (internal->pc_relative) - { - switch (internal->bitsize) - { - case 32: return R_PCRLONG; - case 16: return R_PCRWORD; - case 8: return R_PCRBYTE; - } - } - else - { - switch (internal->bitsize) - { - case 32: return R_RELLONG; - case 16: return R_RELWORD; - case 8: return R_RELBYTE; - } - } - return R_RELLONG; -} - -#ifdef STATIC_RELOCS -static -#endif -reloc_howto_type * -m68k_reloc_type_lookup (abfd, code) - bfd *abfd ATTRIBUTE_UNUSED; - bfd_reloc_code_real_type code; -{ - switch (code) - { - default: return NULL; - case BFD_RELOC_8: return m68kcoff_howto_table + 0; - case BFD_RELOC_16: return m68kcoff_howto_table + 1; - case BFD_RELOC_CTOR: - case BFD_RELOC_32: return m68kcoff_howto_table + 2; - case BFD_RELOC_8_PCREL: return m68kcoff_howto_table + 3; - case BFD_RELOC_16_PCREL: return m68kcoff_howto_table + 4; - case BFD_RELOC_32_PCREL: return m68kcoff_howto_table + 5; - /* FIXME: There doesn't seem to be a code for R_RELLONG_NEG. */ - } - /*NOTREACHED*/ -} - -#endif /* not ONLY_DECLARE_RELOCS */ - -#define RTYPE2HOWTO(internal, relocentry) \ - m68k_rtype2howto(internal, (relocentry)->r_type) - -#define SELECT_RELOC(external, internal) \ - external.r_type = m68k_howto2rtype (internal) - -#define coff_bfd_reloc_type_lookup m68k_reloc_type_lookup - -#ifndef COFF_COMMON_ADDEND -#ifndef coff_rtype_to_howto - -#define coff_rtype_to_howto m68kcoff_rtype_to_howto - -static reloc_howto_type *m68kcoff_rtype_to_howto - PARAMS ((bfd *, asection *, struct internal_reloc *, - struct coff_link_hash_entry *, struct internal_syment *, - bfd_vma *)); - -static reloc_howto_type * -m68kcoff_rtype_to_howto (abfd, sec, rel, h, sym, addendp) - bfd *abfd ATTRIBUTE_UNUSED; - asection *sec; - struct internal_reloc *rel; - struct coff_link_hash_entry *h ATTRIBUTE_UNUSED; - struct internal_syment *sym ATTRIBUTE_UNUSED; - bfd_vma *addendp; -{ - arelent relent; - reloc_howto_type *howto; - - RTYPE2HOWTO (&relent, rel); - - howto = relent.howto; - - if (howto->pc_relative) - *addendp += sec->vma; - - return howto; -} - -#endif /* ! defined (coff_rtype_to_howto) */ -#endif /* ! defined (COFF_COMMON_ADDEND) */ - -#ifdef COFF_COMMON_ADDEND - -/* If COFF_COMMON_ADDEND is defined, then when using m68k COFF the - value stored in the .text section for a reference to a common - symbol is the value itself plus any desired offset. (taken from - work done by Ian Taylor, Cygnus Support, for I386 COFF). */ - -/* If we are producing relocateable output, we need to do some - adjustments to the object file that are not done by the - bfd_perform_relocation function. This function is called by every - reloc type to make any required adjustments. */ - -static bfd_reloc_status_type -m68kcoff_common_addend_special_fn (abfd, reloc_entry, symbol, data, - input_section, output_bfd, error_message) - bfd *abfd; - arelent *reloc_entry; - asymbol *symbol; - PTR data; - asection *input_section ATTRIBUTE_UNUSED; - bfd *output_bfd; - char **error_message ATTRIBUTE_UNUSED; -{ - symvalue diff; - - if (output_bfd == (bfd *) NULL) - return bfd_reloc_continue; - - if (bfd_is_com_section (symbol->section)) - { - /* We are relocating a common symbol. The current value in the - object file is ORIG + OFFSET, where ORIG is the value of the - common symbol as seen by the object file when it was compiled - (this may be zero if the symbol was undefined) and OFFSET is - the offset into the common symbol (normally zero, but may be - non-zero when referring to a field in a common structure). - ORIG is the negative of reloc_entry->addend, which is set by - the CALC_ADDEND macro below. We want to replace the value in - the object file with NEW + OFFSET, where NEW is the value of - the common symbol which we are going to put in the final - object file. NEW is symbol->value. */ - diff = symbol->value + reloc_entry->addend; - } - else - { - /* For some reason bfd_perform_relocation always effectively - ignores the addend for a COFF target when producing - relocateable output. This seems to be always wrong for 386 - COFF, so we handle the addend here instead. */ - diff = reloc_entry->addend; - } - -#define DOIT(x) \ - x = ((x & ~howto->dst_mask) | (((x & howto->src_mask) + diff) & howto->dst_mask)) - - if (diff != 0) - { - reloc_howto_type *howto = reloc_entry->howto; - unsigned char *addr = (unsigned char *) data + reloc_entry->address; - - switch (howto->size) - { - case 0: - { - char x = bfd_get_8 (abfd, addr); - DOIT (x); - bfd_put_8 (abfd, x, addr); - } - break; - - case 1: - { - short x = bfd_get_16 (abfd, addr); - DOIT (x); - bfd_put_16 (abfd, x, addr); - } - break; - - case 2: - { - long x = bfd_get_32 (abfd, addr); - DOIT (x); - bfd_put_32 (abfd, x, addr); - } - break; - - default: - abort (); - } - } - - /* Now let bfd_perform_relocation finish everything up. */ - return bfd_reloc_continue; -} - -/* Compute the addend of a reloc. If the reloc is to a common symbol, - the object file contains the value of the common symbol. By the - time this is called, the linker may be using a different symbol - from a different object file with a different value. Therefore, we - hack wildly to locate the original symbol from this file so that we - can make the correct adjustment. This macro sets coffsym to the - symbol from the original file, and uses it to set the addend value - correctly. If this is not a common symbol, the usual addend - calculation is done, except that an additional tweak is needed for - PC relative relocs. - FIXME: This macro refers to symbols and asect; these are from the - calling function, not the macro arguments. */ - -#define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \ - { \ - coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \ - if (ptr && bfd_asymbol_bfd (ptr) != abfd) \ - coffsym = (obj_symbols (abfd) \ - + (cache_ptr->sym_ptr_ptr - symbols)); \ - else if (ptr) \ - coffsym = coff_symbol_from (abfd, ptr); \ - if (coffsym != (coff_symbol_type *) NULL \ - && coffsym->native->u.syment.n_scnum == 0) \ - cache_ptr->addend = - coffsym->native->u.syment.n_value; \ - else if (ptr && bfd_asymbol_bfd (ptr) == abfd \ - && ptr->section != (asection *) NULL) \ - cache_ptr->addend = - (ptr->section->vma + ptr->value); \ - else \ - cache_ptr->addend = 0; \ - if (ptr && (reloc.r_type == R_PCRBYTE \ - || reloc.r_type == R_PCRWORD \ - || reloc.r_type == R_PCRLONG)) \ - cache_ptr->addend += asect->vma; \ - } - -#ifndef coff_rtype_to_howto - -/* coff-m68k.c uses the special COFF backend linker. We need to - adjust common symbols. */ - -static reloc_howto_type * -m68kcoff_common_addend_rtype_to_howto (abfd, sec, rel, h, sym, addendp) - bfd *abfd ATTRIBUTE_UNUSED; - asection *sec; - struct internal_reloc *rel; - struct coff_link_hash_entry *h; - struct internal_syment *sym; - bfd_vma *addendp; -{ - arelent relent; - reloc_howto_type *howto; - - RTYPE2HOWTO (&relent, rel); - - howto = relent.howto; - - if (howto->pc_relative) - *addendp += sec->vma; - - if (sym != NULL && sym->n_scnum == 0 && sym->n_value != 0) - { - /* This is a common symbol. The section contents include the - size (sym->n_value) as an addend. The relocate_section - function will be adding in the final value of the symbol. We - need to subtract out the current size in order to get the - correct result. */ - BFD_ASSERT (h != NULL); - *addendp -= sym->n_value; - } - - /* If the output symbol is common (in which case this must be a - relocateable link), we need to add in the final size of the - common symbol. */ - if (h != NULL && h->root.type == bfd_link_hash_common) - *addendp += h->root.u.c.size; - - return howto; -} - -#define coff_rtype_to_howto m68kcoff_common_addend_rtype_to_howto - -#endif /* ! defined (coff_rtype_to_howto) */ - -#endif /* COFF_COMMON_ADDEND */ - -#if !defined ONLY_DECLARE_RELOCS && ! defined STATIC_RELOCS -/* Given a .data section and a .emreloc in-memory section, store - relocation information into the .emreloc section which can be - used at runtime to relocate the section. This is called by the - linker when the --embedded-relocs switch is used. This is called - after the add_symbols entry point has been called for all the - objects, and before the final_link entry point is called. */ - -boolean -bfd_m68k_coff_create_embedded_relocs (abfd, info, datasec, relsec, errmsg) - bfd *abfd; - struct bfd_link_info *info; - asection *datasec; - asection *relsec; - char **errmsg; -{ - char *extsyms; - bfd_size_type symesz; - struct internal_reloc *irel, *irelend; - bfd_byte *p; - - BFD_ASSERT (! info->relocateable); - - *errmsg = NULL; - - if (datasec->reloc_count == 0) - return true; - - extsyms = obj_coff_external_syms (abfd); - symesz = bfd_coff_symesz (abfd); - - irel = _bfd_coff_read_internal_relocs (abfd, datasec, true, NULL, false, - NULL); - irelend = irel + datasec->reloc_count; - - relsec->contents = (bfd_byte *) bfd_alloc (abfd, datasec->reloc_count * 12); - if (relsec->contents == NULL) - return false; - - p = relsec->contents; - - for (; irel < irelend; irel++, p += 12) - { - asection *targetsec; - - /* We are going to write a four byte longword into the runtime - reloc section. The longword will be the address in the data - section which must be relocated. It is followed by the name - of the target section NUL-padded or truncated to 8 - characters. */ - - /* We can only relocate absolute longword relocs at run time. */ - if (irel->r_type != R_RELLONG) - { - *errmsg = _("unsupported reloc type"); - bfd_set_error (bfd_error_bad_value); - return false; - } - - if (irel->r_symndx == -1) - targetsec = bfd_abs_section_ptr; - else - { - struct coff_link_hash_entry *h; - - h = obj_coff_sym_hashes (abfd)[irel->r_symndx]; - if (h == NULL) - { - struct internal_syment isym; - - bfd_coff_swap_sym_in (abfd, extsyms + symesz * irel->r_symndx, - &isym); - targetsec = coff_section_from_bfd_index (abfd, isym.n_scnum); - } - else if (h->root.type == bfd_link_hash_defined - || h->root.type == bfd_link_hash_defweak) - targetsec = h->root.u.def.section; - else - targetsec = NULL; - } - - bfd_put_32 (abfd, - (irel->r_vaddr - datasec->vma + datasec->output_offset), p); - memset (p + 4, 0, 8); - if (targetsec != NULL) - strncpy (p + 4, targetsec->output_section->name, 8); - } - - return true; -} -#endif /* neither ONLY_DECLARE_RELOCS not STATIC_RELOCS */ - -#define coff_bfd_is_local_label_name m68k_coff_is_local_label_name - -#define coff_relocate_section _bfd_coff_generic_relocate_section - -#include "coffcode.h" - -#ifndef TARGET_SYM -#define TARGET_SYM m68kcoff_vec -#endif - -#ifndef TARGET_NAME -#define TARGET_NAME "coff-m68k" -#endif - -#ifdef NAMES_HAVE_UNDERSCORE -CREATE_BIG_COFF_TARGET_VEC (TARGET_SYM, TARGET_NAME, D_PAGED, 0, '_', NULL) -#else -CREATE_BIG_COFF_TARGET_VEC (TARGET_SYM, TARGET_NAME, D_PAGED, 0, 0, NULL) -#endif |