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Diffstat (limited to 'contrib/gdb/bfd/coff-aux.c')
| -rw-r--r-- | contrib/gdb/bfd/coff-aux.c | 332 |
1 files changed, 0 insertions, 332 deletions
diff --git a/contrib/gdb/bfd/coff-aux.c b/contrib/gdb/bfd/coff-aux.c deleted file mode 100644 index 1dba9d5..0000000 --- a/contrib/gdb/bfd/coff-aux.c +++ /dev/null @@ -1,332 +0,0 @@ -/* BFD back-end for Apple M68K COFF A/UX 3.x files. - Copyright 1996 Free Software Foundation, Inc. - Portions written by Richard Henderson <rth@tamu.edu>, - COMMON symbol munging cribbed from cf-m68klynx.c which was - 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. */ - -#define TARGET_SYM m68kaux_coff_vec -#define TARGET_NAME "coff-m68k-aux" - -#ifndef TARG_AUX -#define TARG_AUX -#endif - -#define COFF_LONG_FILENAMES - -/* 4k pages */ -#define COFF_PAGE_SIZE 0x1000 - -/* On AUX, a STYP_NOLOAD|STYP_BSS section is part of a shared library. */ -#define BSS_NOLOAD_IS_SHARED_LIBRARY - -#define _bfd_m68kcoff_howto_table _bfd_m68kaux_howto_table -#define _bfd_m68kcoff_rtype2howto _bfd_m68kaux_rtype2howto -#define _bfd_m68kcoff_howto2rtype _bfd_m68kaux_howto2rtype -#define _bfd_m68kcoff_reloc_type_lookup _bfd_m68kaux_reloc_type_lookup - -/* Rather than change names lots of places, reuse the same hack */ -#define LYNX_SPECIAL_FN _bfd_m68kaux_special_fn - -#include "bfd.h" -#include "sysdep.h" - -#ifdef ANSI_PROTOTYPES -struct internal_reloc; -struct coff_link_hash_entry; -struct internal_syment; -#endif - - -static bfd_reloc_status_type _bfd_m68kaux_special_fn - PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); -static reloc_howto_type *coff_m68k_aux_rtype_to_howto - PARAMS ((bfd *, asection *, struct internal_reloc *, - struct coff_link_hash_entry *, struct internal_syment *, - bfd_vma *)); -static boolean coff_m68k_aux_link_add_one_symbol - PARAMS ((struct bfd_link_info *, bfd *, const char *, flagword, - asection *, bfd_vma, const char *, boolean, boolean, - struct bfd_link_hash_entry **)); - - -#define coff_rtype_to_howto coff_m68k_aux_rtype_to_howto -#define coff_link_add_one_symbol coff_m68k_aux_link_add_one_symbol - - -/* 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; \ - } - - - -#include "coff/aux-coff.h" /* override coff/internal.h and coff/m68k.h */ -#include "coff-m68k.c" - - - -/* For some reason 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 -_bfd_m68kaux_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; - bfd *output_bfd; - char **error_message; -{ - 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; -} - - -/* coff-m68k.c uses the special COFF backend linker. We need to - adjust common symbols. */ - -/*ARGSUSED*/ -static reloc_howto_type * -coff_m68k_aux_rtype_to_howto (abfd, sec, rel, h, sym, addendp) - bfd *abfd; - 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 (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; -} - - -/* We need non-absolute symbols to override absolute symbols. This - mirrors Apple's "solution" to let a static library symbol override - a shared library symbol. On the whole not a good thing, given how - shared libraries work here, but can work if you are careful with - what you include in the shared object. */ - -boolean -coff_m68k_aux_link_add_one_symbol (info, abfd, name, flags, section, value, - string, copy, collect, hashp) - struct bfd_link_info *info; - bfd *abfd; - const char *name; - flagword flags; - asection *section; - bfd_vma value; - const char *string; - boolean copy; - boolean collect; - struct bfd_link_hash_entry **hashp; -{ - struct bfd_link_hash_entry *h; - - if ((flags & (BSF_WARNING | BSF_CONSTRUCTOR | BSF_WEAK)) == 0 && - !bfd_is_und_section (section) && - !bfd_is_com_section (section)) - { - /* The new symbol is a definition or an indirect definition */ - - /* This bit copied from linker.c */ - if (hashp != NULL && *hashp != NULL) - { - h = *hashp; - BFD_ASSERT (strcmp (h->root.string, name) == 0); - } - else - { - h = bfd_link_hash_lookup (info->hash, name, true, copy, false); - if (h == NULL) - { - if (hashp != NULL) - *hashp = NULL; - return false; - } - } - - if (info->notice_hash != (struct bfd_hash_table *) NULL - && (bfd_hash_lookup (info->notice_hash, name, false, false) - != (struct bfd_hash_entry *) NULL)) - { - if (! (*info->callbacks->notice) (info, name, abfd, section, value)) - return false; - } - - if (hashp != (struct bfd_link_hash_entry **) NULL) - *hashp = h; - /* end duplication from linker.c */ - - if (h->type == bfd_link_hash_defined - || h->type == bfd_link_hash_indirect) - { - asection *msec; - - if (h->type == bfd_link_hash_defined) - msec = h->u.def.section; - else - msec = bfd_ind_section_ptr; - - if (bfd_is_abs_section (msec) && !bfd_is_abs_section (section)) - { - h->u.def.section = section; - h->u.def.value = value; - return true; - } - else if (bfd_is_abs_section (section) && !bfd_is_abs_section (msec)) - return true; - } - } - - /* If we didn't exit early, finish processing in the generic routine */ - return _bfd_generic_link_add_one_symbol (info, abfd, name, flags, section, - value, string, copy, collect, - hashp); -} |
