diff options
Diffstat (limited to 'binutils-2.24/bfd/cofflink.c')
| -rw-r--r-- | binutils-2.24/bfd/cofflink.c | 3196 |
1 files changed, 0 insertions, 3196 deletions
diff --git a/binutils-2.24/bfd/cofflink.c b/binutils-2.24/bfd/cofflink.c deleted file mode 100644 index 948b4cd0..00000000 --- a/binutils-2.24/bfd/cofflink.c +++ /dev/null @@ -1,3196 +0,0 @@ -/* COFF specific linker code. - Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, - 2004, 2005, 2006, 2007, 2008, 2009, 2011 Free Software Foundation, Inc. - Written by Ian Lance Taylor, 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 3 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., 51 Franklin Street - Fifth Floor, Boston, - MA 02110-1301, USA. */ - -/* This file contains the COFF backend linker code. */ - -#include "sysdep.h" -#include "bfd.h" -#include "bfdlink.h" -#include "libbfd.h" -#include "coff/internal.h" -#include "libcoff.h" -#include "safe-ctype.h" - -static bfd_boolean coff_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info); -static bfd_boolean coff_link_check_archive_element (bfd *abfd, struct bfd_link_info *info, bfd_boolean *pneeded); -static bfd_boolean coff_link_add_symbols (bfd *abfd, struct bfd_link_info *info); - -/* Return TRUE if SYM is a weak, external symbol. */ -#define IS_WEAK_EXTERNAL(abfd, sym) \ - ((sym).n_sclass == C_WEAKEXT \ - || (obj_pe (abfd) && (sym).n_sclass == C_NT_WEAK)) - -/* Return TRUE if SYM is an external symbol. */ -#define IS_EXTERNAL(abfd, sym) \ - ((sym).n_sclass == C_EXT || IS_WEAK_EXTERNAL (abfd, sym)) - -/* Define macros so that the ISFCN, et. al., macros work correctly. - These macros are defined in include/coff/internal.h in terms of - N_TMASK, etc. These definitions require a user to define local - variables with the appropriate names, and with values from the - coff_data (abfd) structure. */ - -#define N_TMASK n_tmask -#define N_BTSHFT n_btshft -#define N_BTMASK n_btmask - -/* Create an entry in a COFF linker hash table. */ - -struct bfd_hash_entry * -_bfd_coff_link_hash_newfunc (struct bfd_hash_entry *entry, - struct bfd_hash_table *table, - const char *string) -{ - struct coff_link_hash_entry *ret = (struct coff_link_hash_entry *) entry; - - /* Allocate the structure if it has not already been allocated by a - subclass. */ - if (ret == (struct coff_link_hash_entry *) NULL) - ret = ((struct coff_link_hash_entry *) - bfd_hash_allocate (table, sizeof (struct coff_link_hash_entry))); - if (ret == (struct coff_link_hash_entry *) NULL) - return (struct bfd_hash_entry *) ret; - - /* Call the allocation method of the superclass. */ - ret = ((struct coff_link_hash_entry *) - _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret, - table, string)); - if (ret != (struct coff_link_hash_entry *) NULL) - { - /* Set local fields. */ - ret->indx = -1; - ret->type = T_NULL; - ret->symbol_class = C_NULL; - ret->numaux = 0; - ret->auxbfd = NULL; - ret->aux = NULL; - } - - return (struct bfd_hash_entry *) ret; -} - -/* Initialize a COFF linker hash table. */ - -bfd_boolean -_bfd_coff_link_hash_table_init (struct coff_link_hash_table *table, - bfd *abfd, - struct bfd_hash_entry *(*newfunc) (struct bfd_hash_entry *, - struct bfd_hash_table *, - const char *), - unsigned int entsize) -{ - memset (&table->stab_info, 0, sizeof (table->stab_info)); - return _bfd_link_hash_table_init (&table->root, abfd, newfunc, entsize); -} - -/* Create a COFF linker hash table. */ - -struct bfd_link_hash_table * -_bfd_coff_link_hash_table_create (bfd *abfd) -{ - struct coff_link_hash_table *ret; - bfd_size_type amt = sizeof (struct coff_link_hash_table); - - ret = (struct coff_link_hash_table *) bfd_malloc (amt); - if (ret == NULL) - return NULL; - - if (! _bfd_coff_link_hash_table_init (ret, abfd, - _bfd_coff_link_hash_newfunc, - sizeof (struct coff_link_hash_entry))) - { - free (ret); - return (struct bfd_link_hash_table *) NULL; - } - return &ret->root; -} - -/* Create an entry in a COFF debug merge hash table. */ - -struct bfd_hash_entry * -_bfd_coff_debug_merge_hash_newfunc (struct bfd_hash_entry *entry, - struct bfd_hash_table *table, - const char *string) -{ - struct coff_debug_merge_hash_entry *ret = - (struct coff_debug_merge_hash_entry *) entry; - - /* Allocate the structure if it has not already been allocated by a - subclass. */ - if (ret == (struct coff_debug_merge_hash_entry *) NULL) - ret = ((struct coff_debug_merge_hash_entry *) - bfd_hash_allocate (table, - sizeof (struct coff_debug_merge_hash_entry))); - if (ret == (struct coff_debug_merge_hash_entry *) NULL) - return (struct bfd_hash_entry *) ret; - - /* Call the allocation method of the superclass. */ - ret = ((struct coff_debug_merge_hash_entry *) - bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string)); - if (ret != (struct coff_debug_merge_hash_entry *) NULL) - { - /* Set local fields. */ - ret->types = NULL; - } - - return (struct bfd_hash_entry *) ret; -} - -/* Given a COFF BFD, add symbols to the global hash table as - appropriate. */ - -bfd_boolean -_bfd_coff_link_add_symbols (bfd *abfd, struct bfd_link_info *info) -{ - switch (bfd_get_format (abfd)) - { - case bfd_object: - return coff_link_add_object_symbols (abfd, info); - case bfd_archive: - return _bfd_generic_link_add_archive_symbols - (abfd, info, coff_link_check_archive_element); - default: - bfd_set_error (bfd_error_wrong_format); - return FALSE; - } -} - -/* Add symbols from a COFF object file. */ - -static bfd_boolean -coff_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info) -{ - if (! _bfd_coff_get_external_symbols (abfd)) - return FALSE; - if (! coff_link_add_symbols (abfd, info)) - return FALSE; - - if (! info->keep_memory - && ! _bfd_coff_free_symbols (abfd)) - return FALSE; - - return TRUE; -} - -/* Look through the symbols to see if this object file should be - included in the link. */ - -static bfd_boolean -coff_link_check_ar_symbols (bfd *abfd, - struct bfd_link_info *info, - bfd_boolean *pneeded, - bfd **subsbfd) -{ - bfd_size_type symesz; - bfd_byte *esym; - bfd_byte *esym_end; - - *pneeded = FALSE; - - symesz = bfd_coff_symesz (abfd); - esym = (bfd_byte *) obj_coff_external_syms (abfd); - esym_end = esym + obj_raw_syment_count (abfd) * symesz; - while (esym < esym_end) - { - struct internal_syment sym; - enum coff_symbol_classification classification; - - bfd_coff_swap_sym_in (abfd, esym, &sym); - - classification = bfd_coff_classify_symbol (abfd, &sym); - if (classification == COFF_SYMBOL_GLOBAL - || classification == COFF_SYMBOL_COMMON) - { - const char *name; - char buf[SYMNMLEN + 1]; - struct bfd_link_hash_entry *h; - - /* This symbol is externally visible, and is defined by this - object file. */ - name = _bfd_coff_internal_syment_name (abfd, &sym, buf); - if (name == NULL) - return FALSE; - h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE); - - /* Auto import. */ - if (!h - && info->pei386_auto_import - && CONST_STRNEQ (name, "__imp_")) - h = bfd_link_hash_lookup (info->hash, name + 6, FALSE, FALSE, TRUE); - - /* We are only interested in symbols that are currently - undefined. If a symbol is currently known to be common, - COFF linkers do not bring in an object file which defines - it. */ - if (h != (struct bfd_link_hash_entry *) NULL - && h->type == bfd_link_hash_undefined) - { - if (!(*info->callbacks - ->add_archive_element) (info, abfd, name, subsbfd)) - return FALSE; - *pneeded = TRUE; - return TRUE; - } - } - - esym += (sym.n_numaux + 1) * symesz; - } - - /* We do not need this object file. */ - return TRUE; -} - -/* Check a single archive element to see if we need to include it in - the link. *PNEEDED is set according to whether this element is - needed in the link or not. This is called via - _bfd_generic_link_add_archive_symbols. */ - -static bfd_boolean -coff_link_check_archive_element (bfd *abfd, - struct bfd_link_info *info, - bfd_boolean *pneeded) -{ - bfd *oldbfd; - bfd_boolean needed; - - if (!_bfd_coff_get_external_symbols (abfd)) - return FALSE; - - oldbfd = abfd; - if (!coff_link_check_ar_symbols (abfd, info, pneeded, &abfd)) - return FALSE; - - needed = *pneeded; - if (needed) - { - /* Potentially, the add_archive_element hook may have set a - substitute BFD for us. */ - if (abfd != oldbfd) - { - if (!info->keep_memory - && !_bfd_coff_free_symbols (oldbfd)) - return FALSE; - if (!_bfd_coff_get_external_symbols (abfd)) - return FALSE; - } - if (!coff_link_add_symbols (abfd, info)) - return FALSE; - } - - if (!info->keep_memory || !needed) - { - if (!_bfd_coff_free_symbols (abfd)) - return FALSE; - } - return TRUE; -} - -/* Add all the symbols from an object file to the hash table. */ - -static bfd_boolean -coff_link_add_symbols (bfd *abfd, - struct bfd_link_info *info) -{ - unsigned int n_tmask = coff_data (abfd)->local_n_tmask; - unsigned int n_btshft = coff_data (abfd)->local_n_btshft; - unsigned int n_btmask = coff_data (abfd)->local_n_btmask; - bfd_boolean keep_syms; - bfd_boolean default_copy; - bfd_size_type symcount; - struct coff_link_hash_entry **sym_hash; - bfd_size_type symesz; - bfd_byte *esym; - bfd_byte *esym_end; - bfd_size_type amt; - - symcount = obj_raw_syment_count (abfd); - - if (symcount == 0) - return TRUE; /* Nothing to do. */ - - /* Keep the symbols during this function, in case the linker needs - to read the generic symbols in order to report an error message. */ - keep_syms = obj_coff_keep_syms (abfd); - obj_coff_keep_syms (abfd) = TRUE; - - if (info->keep_memory) - default_copy = FALSE; - else - default_copy = TRUE; - - /* We keep a list of the linker hash table entries that correspond - to particular symbols. */ - amt = symcount * sizeof (struct coff_link_hash_entry *); - sym_hash = (struct coff_link_hash_entry **) bfd_zalloc (abfd, amt); - if (sym_hash == NULL) - goto error_return; - obj_coff_sym_hashes (abfd) = sym_hash; - - symesz = bfd_coff_symesz (abfd); - BFD_ASSERT (symesz == bfd_coff_auxesz (abfd)); - esym = (bfd_byte *) obj_coff_external_syms (abfd); - esym_end = esym + symcount * symesz; - while (esym < esym_end) - { - struct internal_syment sym; - enum coff_symbol_classification classification; - bfd_boolean copy; - - bfd_coff_swap_sym_in (abfd, esym, &sym); - - classification = bfd_coff_classify_symbol (abfd, &sym); - if (classification != COFF_SYMBOL_LOCAL) - { - const char *name; - char buf[SYMNMLEN + 1]; - flagword flags; - asection *section; - bfd_vma value; - bfd_boolean addit; - - /* This symbol is externally visible. */ - - name = _bfd_coff_internal_syment_name (abfd, &sym, buf); - if (name == NULL) - goto error_return; - - /* We must copy the name into memory if we got it from the - syment itself, rather than the string table. */ - copy = default_copy; - if (sym._n._n_n._n_zeroes != 0 - || sym._n._n_n._n_offset == 0) - copy = TRUE; - - value = sym.n_value; - - switch (classification) - { - default: - abort (); - - case COFF_SYMBOL_GLOBAL: - flags = BSF_EXPORT | BSF_GLOBAL; - section = coff_section_from_bfd_index (abfd, sym.n_scnum); - if (! obj_pe (abfd)) - value -= section->vma; - break; - - case COFF_SYMBOL_UNDEFINED: - flags = 0; - section = bfd_und_section_ptr; - break; - - case COFF_SYMBOL_COMMON: - flags = BSF_GLOBAL; - section = bfd_com_section_ptr; - break; - - case COFF_SYMBOL_PE_SECTION: - flags = BSF_SECTION_SYM | BSF_GLOBAL; - section = coff_section_from_bfd_index (abfd, sym.n_scnum); - break; - } - - if (IS_WEAK_EXTERNAL (abfd, sym)) - flags = BSF_WEAK; - - addit = TRUE; - - /* In the PE format, section symbols actually refer to the - start of the output section. We handle them specially - here. */ - if (obj_pe (abfd) && (flags & BSF_SECTION_SYM) != 0) - { - *sym_hash = coff_link_hash_lookup (coff_hash_table (info), - name, FALSE, copy, FALSE); - if (*sym_hash != NULL) - { - if (((*sym_hash)->coff_link_hash_flags - & COFF_LINK_HASH_PE_SECTION_SYMBOL) == 0 - && (*sym_hash)->root.type != bfd_link_hash_undefined - && (*sym_hash)->root.type != bfd_link_hash_undefweak) - (*_bfd_error_handler) - ("Warning: symbol `%s' is both section and non-section", - name); - - addit = FALSE; - } - } - - /* The Microsoft Visual C compiler does string pooling by - hashing the constants to an internal symbol name, and - relying on the linker comdat support to discard - duplicate names. However, if one string is a literal and - one is a data initializer, one will end up in the .data - section and one will end up in the .rdata section. The - Microsoft linker will combine them into the .data - section, which seems to be wrong since it might cause the - literal to change. - - As long as there are no external references to the - symbols, which there shouldn't be, we can treat the .data - and .rdata instances as separate symbols. The comdat - code in the linker will do the appropriate merging. Here - we avoid getting a multiple definition error for one of - these special symbols. - - FIXME: I don't think this will work in the case where - there are two object files which use the constants as a - literal and two object files which use it as a data - initializer. One or the other of the second object files - is going to wind up with an inappropriate reference. */ - if (obj_pe (abfd) - && (classification == COFF_SYMBOL_GLOBAL - || classification == COFF_SYMBOL_PE_SECTION) - && coff_section_data (abfd, section) != NULL - && coff_section_data (abfd, section)->comdat != NULL - && CONST_STRNEQ (name, "??_") - && strcmp (name, coff_section_data (abfd, section)->comdat->name) == 0) - { - if (*sym_hash == NULL) - *sym_hash = coff_link_hash_lookup (coff_hash_table (info), - name, FALSE, copy, FALSE); - if (*sym_hash != NULL - && (*sym_hash)->root.type == bfd_link_hash_defined - && coff_section_data (abfd, (*sym_hash)->root.u.def.section)->comdat != NULL - && strcmp (coff_section_data (abfd, (*sym_hash)->root.u.def.section)->comdat->name, - coff_section_data (abfd, section)->comdat->name) == 0) - addit = FALSE; - } - - if (addit) - { - if (! (bfd_coff_link_add_one_symbol - (info, abfd, name, flags, section, value, - (const char *) NULL, copy, FALSE, - (struct bfd_link_hash_entry **) sym_hash))) - goto error_return; - } - - if (obj_pe (abfd) && (flags & BSF_SECTION_SYM) != 0) - (*sym_hash)->coff_link_hash_flags |= - COFF_LINK_HASH_PE_SECTION_SYMBOL; - - /* Limit the alignment of a common symbol to the possible - alignment of a section. There is no point to permitting - a higher alignment for a common symbol: we can not - guarantee it, and it may cause us to allocate extra space - in the common section. */ - if (section == bfd_com_section_ptr - && (*sym_hash)->root.type == bfd_link_hash_common - && ((*sym_hash)->root.u.c.p->alignment_power - > bfd_coff_default_section_alignment_power (abfd))) - (*sym_hash)->root.u.c.p->alignment_power - = bfd_coff_default_section_alignment_power (abfd); - - if (bfd_get_flavour (info->output_bfd) == bfd_get_flavour (abfd)) - { - /* If we don't have any symbol information currently in - the hash table, or if we are looking at a symbol - definition, then update the symbol class and type in - the hash table. */ - if (((*sym_hash)->symbol_class == C_NULL - && (*sym_hash)->type == T_NULL) - || sym.n_scnum != 0 - || (sym.n_value != 0 - && (*sym_hash)->root.type != bfd_link_hash_defined - && (*sym_hash)->root.type != bfd_link_hash_defweak)) - { - (*sym_hash)->symbol_class = sym.n_sclass; - if (sym.n_type != T_NULL) - { - /* We want to warn if the type changed, but not - if it changed from an unspecified type. - Testing the whole type byte may work, but the - change from (e.g.) a function of unspecified - type to function of known type also wants to - skip the warning. */ - if ((*sym_hash)->type != T_NULL - && (*sym_hash)->type != sym.n_type - && !(DTYPE ((*sym_hash)->type) == DTYPE (sym.n_type) - && (BTYPE ((*sym_hash)->type) == T_NULL - || BTYPE (sym.n_type) == T_NULL))) - (*_bfd_error_handler) - (_("Warning: type of symbol `%s' changed from %d to %d in %B"), - abfd, name, (*sym_hash)->type, sym.n_type); - - /* We don't want to change from a meaningful - base type to a null one, but if we know - nothing, take what little we might now know. */ - if (BTYPE (sym.n_type) != T_NULL - || (*sym_hash)->type == T_NULL) - (*sym_hash)->type = sym.n_type; - } - (*sym_hash)->auxbfd = abfd; - if (sym.n_numaux != 0) - { - union internal_auxent *alloc; - unsigned int i; - bfd_byte *eaux; - union internal_auxent *iaux; - - (*sym_hash)->numaux = sym.n_numaux; - alloc = ((union internal_auxent *) - bfd_hash_allocate (&info->hash->table, - (sym.n_numaux - * sizeof (*alloc)))); - if (alloc == NULL) - goto error_return; - for (i = 0, eaux = esym + symesz, iaux = alloc; - i < sym.n_numaux; - i++, eaux += symesz, iaux++) - bfd_coff_swap_aux_in (abfd, eaux, sym.n_type, - sym.n_sclass, (int) i, - sym.n_numaux, iaux); - (*sym_hash)->aux = alloc; - } - } - } - - if (classification == COFF_SYMBOL_PE_SECTION - && (*sym_hash)->numaux != 0) - { - /* Some PE sections (such as .bss) have a zero size in - the section header, but a non-zero size in the AUX - record. Correct that here. - - FIXME: This is not at all the right place to do this. - For example, it won't help objdump. This needs to be - done when we swap in the section header. */ - BFD_ASSERT ((*sym_hash)->numaux == 1); - if (section->size == 0) - section->size = (*sym_hash)->aux[0].x_scn.x_scnlen; - - /* FIXME: We could test whether the section sizes - matches the size in the aux entry, but apparently - that sometimes fails unexpectedly. */ - } - } - - esym += (sym.n_numaux + 1) * symesz; - sym_hash += sym.n_numaux + 1; - } - - /* If this is a non-traditional, non-relocatable link, try to - optimize the handling of any .stab/.stabstr sections. */ - if (! info->relocatable - && ! info->traditional_format - && bfd_get_flavour (info->output_bfd) == bfd_get_flavour (abfd) - && (info->strip != strip_all && info->strip != strip_debugger)) - { - asection *stabstr; - - stabstr = bfd_get_section_by_name (abfd, ".stabstr"); - - if (stabstr != NULL) - { - bfd_size_type string_offset = 0; - asection *stab; - - for (stab = abfd->sections; stab; stab = stab->next) - if (CONST_STRNEQ (stab->name, ".stab") - && (!stab->name[5] - || (stab->name[5] == '.' && ISDIGIT (stab->name[6])))) - { - struct coff_link_hash_table *table; - struct coff_section_tdata *secdata - = coff_section_data (abfd, stab); - - if (secdata == NULL) - { - amt = sizeof (struct coff_section_tdata); - stab->used_by_bfd = bfd_zalloc (abfd, amt); - if (stab->used_by_bfd == NULL) - goto error_return; - secdata = coff_section_data (abfd, stab); - } - - table = coff_hash_table (info); - - if (! _bfd_link_section_stabs (abfd, &table->stab_info, - stab, stabstr, - &secdata->stab_info, - &string_offset)) - goto error_return; - } - } - } - - obj_coff_keep_syms (abfd) = keep_syms; - - return TRUE; - - error_return: - obj_coff_keep_syms (abfd) = keep_syms; - return FALSE; -} - -/* Do the final link step. */ - -bfd_boolean -_bfd_coff_final_link (bfd *abfd, - struct bfd_link_info *info) -{ - bfd_size_type symesz; - struct coff_final_link_info flaginfo; - bfd_boolean debug_merge_allocated; - bfd_boolean long_section_names; - asection *o; - struct bfd_link_order *p; - bfd_size_type max_sym_count; - bfd_size_type max_lineno_count; - bfd_size_type max_reloc_count; - bfd_size_type max_output_reloc_count; - bfd_size_type max_contents_size; - file_ptr rel_filepos; - unsigned int relsz; - file_ptr line_filepos; - unsigned int linesz; - bfd *sub; - bfd_byte *external_relocs = NULL; - char strbuf[STRING_SIZE_SIZE]; - bfd_size_type amt; - - symesz = bfd_coff_symesz (abfd); - - flaginfo.info = info; - flaginfo.output_bfd = abfd; - flaginfo.strtab = NULL; - flaginfo.section_info = NULL; - flaginfo.last_file_index = -1; - flaginfo.last_bf_index = -1; - flaginfo.internal_syms = NULL; - flaginfo.sec_ptrs = NULL; - flaginfo.sym_indices = NULL; - flaginfo.outsyms = NULL; - flaginfo.linenos = NULL; - flaginfo.contents = NULL; - flaginfo.external_relocs = NULL; - flaginfo.internal_relocs = NULL; - flaginfo.global_to_static = FALSE; - debug_merge_allocated = FALSE; - - coff_data (abfd)->link_info = info; - - flaginfo.strtab = _bfd_stringtab_init (); - if (flaginfo.strtab == NULL) - goto error_return; - - if (! coff_debug_merge_hash_table_init (&flaginfo.debug_merge)) - goto error_return; - debug_merge_allocated = TRUE; - - /* Compute the file positions for all the sections. */ - if (! abfd->output_has_begun) - { - if (! bfd_coff_compute_section_file_positions (abfd)) - goto error_return; - } - - /* Count the line numbers and relocation entries required for the - output file. Set the file positions for the relocs. */ - rel_filepos = obj_relocbase (abfd); - relsz = bfd_coff_relsz (abfd); - max_contents_size = 0; - max_lineno_count = 0; - max_reloc_count = 0; - - long_section_names = FALSE; - for (o = abfd->sections; o != NULL; o = o->next) - { - o->reloc_count = 0; - o->lineno_count = 0; - for (p = o->map_head.link_order; p != NULL; p = p->next) - { - if (p->type == bfd_indirect_link_order) - { - asection *sec; - - sec = p->u.indirect.section; - - /* Mark all sections which are to be included in the - link. This will normally be every section. We need - to do this so that we can identify any sections which - the linker has decided to not include. */ - sec->linker_mark = TRUE; - - if (info->strip == strip_none - || info->strip == strip_some) - o->lineno_count += sec->lineno_count; - - if (info->relocatable) - o->reloc_count += sec->reloc_count; - - if (sec->rawsize > max_contents_size) - max_contents_size = sec->rawsize; - if (sec->size > max_contents_size) - max_contents_size = sec->size; - if (sec->lineno_count > max_lineno_count) - max_lineno_count = sec->lineno_count; - if (sec->reloc_count > max_reloc_count) - max_reloc_count = sec->reloc_count; - } - else if (info->relocatable - && (p->type == bfd_section_reloc_link_order - || p->type == bfd_symbol_reloc_link_order)) - ++o->reloc_count; - } - if (o->reloc_count == 0) - o->rel_filepos = 0; - else - { - o->flags |= SEC_RELOC; - o->rel_filepos = rel_filepos; - rel_filepos += o->reloc_count * relsz; - /* In PE COFF, if there are at least 0xffff relocations an - extra relocation will be written out to encode the count. */ - if (obj_pe (abfd) && o->reloc_count >= 0xffff) - rel_filepos += relsz; - } - - if (bfd_coff_long_section_names (abfd) - && strlen (o->name) > SCNNMLEN) - { - /* This section has a long name which must go in the string - table. This must correspond to the code in - coff_write_object_contents which puts the string index - into the s_name field of the section header. That is why - we pass hash as FALSE. */ - if (_bfd_stringtab_add (flaginfo.strtab, o->name, FALSE, FALSE) - == (bfd_size_type) -1) - goto error_return; - long_section_names = TRUE; - } - } - - /* If doing a relocatable link, allocate space for the pointers we - need to keep. */ - if (info->relocatable) - { - unsigned int i; - - /* We use section_count + 1, rather than section_count, because - the target_index fields are 1 based. */ - amt = abfd->section_count + 1; - amt *= sizeof (struct coff_link_section_info); - flaginfo.section_info = (struct coff_link_section_info *) bfd_malloc (amt); - if (flaginfo.section_info == NULL) - goto error_return; - for (i = 0; i <= abfd->section_count; i++) - { - flaginfo.section_info[i].relocs = NULL; - flaginfo.section_info[i].rel_hashes = NULL; - } - } - - /* We now know the size of the relocs, so we can determine the file - positions of the line numbers. */ - line_filepos = rel_filepos; - linesz = bfd_coff_linesz (abfd); - max_output_reloc_count = 0; - for (o = abfd->sections; o != NULL; o = o->next) - { - if (o->lineno_count == 0) - o->line_filepos = 0; - else - { - o->line_filepos = line_filepos; - line_filepos += o->lineno_count * linesz; - } - - if (o->reloc_count != 0) - { - /* We don't know the indices of global symbols until we have - written out all the local symbols. For each section in - the output file, we keep an array of pointers to hash - table entries. Each entry in the array corresponds to a - reloc. When we find a reloc against a global symbol, we - set the corresponding entry in this array so that we can - fix up the symbol index after we have written out all the - local symbols. - - Because of this problem, we also keep the relocs in - memory until the end of the link. This wastes memory, - but only when doing a relocatable link, which is not the - common case. */ - BFD_ASSERT (info->relocatable); - amt = o->reloc_count; - amt *= sizeof (struct internal_reloc); - flaginfo.section_info[o->target_index].relocs = - (struct internal_reloc *) bfd_malloc (amt); - amt = o->reloc_count; - amt *= sizeof (struct coff_link_hash_entry *); - flaginfo.section_info[o->target_index].rel_hashes = - (struct coff_link_hash_entry **) bfd_malloc (amt); - if (flaginfo.section_info[o->target_index].relocs == NULL - || flaginfo.section_info[o->target_index].rel_hashes == NULL) - goto error_return; - - if (o->reloc_count > max_output_reloc_count) - max_output_reloc_count = o->reloc_count; - } - - /* Reset the reloc and lineno counts, so that we can use them to - count the number of entries we have output so far. */ - o->reloc_count = 0; - o->lineno_count = 0; - } - - obj_sym_filepos (abfd) = line_filepos; - - /* Figure out the largest number of symbols in an input BFD. Take - the opportunity to clear the output_has_begun fields of all the - input BFD's. */ - max_sym_count = 0; - for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) - { - size_t sz; - - sub->output_has_begun = FALSE; - sz = bfd_family_coff (sub) ? obj_raw_syment_count (sub) : 2; - if (sz > max_sym_count) - max_sym_count = sz; - } - - /* Allocate some buffers used while linking. */ - amt = max_sym_count * sizeof (struct internal_syment); - flaginfo.internal_syms = (struct internal_syment *) bfd_malloc (amt); - amt = max_sym_count * sizeof (asection *); - flaginfo.sec_ptrs = (asection **) bfd_malloc (amt); - amt = max_sym_count * sizeof (long); - flaginfo.sym_indices = (long int *) bfd_malloc (amt); - flaginfo.outsyms = (bfd_byte *) bfd_malloc ((max_sym_count + 1) * symesz); - amt = max_lineno_count * bfd_coff_linesz (abfd); - flaginfo.linenos = (bfd_byte *) bfd_malloc (amt); - flaginfo.contents = (bfd_byte *) bfd_malloc (max_contents_size); - amt = max_reloc_count * relsz; - flaginfo.external_relocs = (bfd_byte *) bfd_malloc (amt); - if (! info->relocatable) - { - amt = max_reloc_count * sizeof (struct internal_reloc); - flaginfo.internal_relocs = (struct internal_reloc *) bfd_malloc (amt); - } - if ((flaginfo.internal_syms == NULL && max_sym_count > 0) - || (flaginfo.sec_ptrs == NULL && max_sym_count > 0) - || (flaginfo.sym_indices == NULL && max_sym_count > 0) - || flaginfo.outsyms == NULL - || (flaginfo.linenos == NULL && max_lineno_count > 0) - || (flaginfo.contents == NULL && max_contents_size > 0) - || (flaginfo.external_relocs == NULL && max_reloc_count > 0) - || (! info->relocatable - && flaginfo.internal_relocs == NULL - && max_reloc_count > 0)) - goto error_return; - - /* We now know the position of everything in the file, except that - we don't know the size of the symbol table and therefore we don't - know where the string table starts. We just build the string - table in memory as we go along. We process all the relocations - for a single input file at once. */ - obj_raw_syment_count (abfd) = 0; - - if (coff_backend_info (abfd)->_bfd_coff_start_final_link) - { - if (! bfd_coff_start_final_link (abfd, info)) - goto error_return; - } - - for (o = abfd->sections; o != NULL; o = o->next) - { - for (p = o->map_head.link_order; p != NULL; p = p->next) - { - if (p->type == bfd_indirect_link_order - && bfd_family_coff (p->u.indirect.section->owner)) - { - sub = p->u.indirect.section->owner; - if (! bfd_coff_link_output_has_begun (sub, & flaginfo)) - { - if (! _bfd_coff_link_input_bfd (&flaginfo, sub)) - goto error_return; - sub->output_has_begun = TRUE; - } - } - else if (p->type == bfd_section_reloc_link_order - || p->type == bfd_symbol_reloc_link_order) - { - if (! _bfd_coff_reloc_link_order (abfd, &flaginfo, o, p)) - goto error_return; - } - else - { - if (! _bfd_default_link_order (abfd, info, o, p)) - goto error_return; - } - } - } - - if (flaginfo.info->strip != strip_all && flaginfo.info->discard != discard_all) - { - /* Add local symbols from foreign inputs. */ - for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) - { - unsigned int i; - - if (bfd_family_coff (sub) || ! bfd_get_outsymbols (sub)) - continue; - for (i = 0; i < bfd_get_symcount (sub); ++i) - { - asymbol *sym = bfd_get_outsymbols (sub) [i]; - file_ptr pos; - struct internal_syment isym; - bfd_size_type string_size = 0; - bfd_vma written = 0; - bfd_boolean rewrite = FALSE; - - if (! (sym->flags & BSF_LOCAL) - || (sym->flags & (BSF_SECTION_SYM | BSF_DEBUGGING_RELOC - | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC - | BSF_SYNTHETIC)) - || ((sym->flags & BSF_DEBUGGING) - && ! (sym->flags & BSF_FILE))) - continue; - - /* See if we are discarding symbols with this name. */ - if ((flaginfo.info->strip == strip_some - && (bfd_hash_lookup (flaginfo.info->keep_hash, - bfd_asymbol_name(sym), FALSE, FALSE) - == NULL)) - || (((flaginfo.info->discard == discard_sec_merge - && (bfd_get_section (sym)->flags & SEC_MERGE) - && ! flaginfo.info->relocatable) - || flaginfo.info->discard == discard_l) - && bfd_is_local_label_name (sub, bfd_asymbol_name(sym)))) - continue; - - pos = obj_sym_filepos (abfd) + obj_raw_syment_count (abfd) - * symesz; - if (bfd_seek (abfd, pos, SEEK_SET) != 0) - goto error_return; - if (! coff_write_alien_symbol(abfd, sym, &isym, &written, - &string_size, NULL, NULL)) - goto error_return; - - if (string_size) - { - bfd_boolean hash = ! (abfd->flags & BFD_TRADITIONAL_FORMAT); - bfd_size_type indx; - - indx = _bfd_stringtab_add (flaginfo.strtab, - bfd_asymbol_name (sym), hash, - FALSE); - if (indx == (bfd_size_type) -1) - goto error_return; - isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx; - bfd_coff_swap_sym_out (abfd, &isym, flaginfo.outsyms); - rewrite = TRUE; - } - - if (isym.n_sclass == C_FILE) - { - if (flaginfo.last_file_index != -1) - { - flaginfo.last_file.n_value = obj_raw_syment_count (abfd); - bfd_coff_swap_sym_out (abfd, &flaginfo.last_file, - flaginfo.outsyms); - pos = obj_sym_filepos (abfd) + flaginfo.last_file_index - * symesz; - rewrite = TRUE; - } - flaginfo.last_file_index = obj_raw_syment_count (abfd); - flaginfo.last_file = isym; - } - - if (rewrite - && (bfd_seek (abfd, pos, SEEK_SET) != 0 - || bfd_bwrite (flaginfo.outsyms, symesz, abfd) != symesz)) - goto error_return; - - obj_raw_syment_count (abfd) += written; - } - } - } - - if (! bfd_coff_final_link_postscript (abfd, & flaginfo)) - goto error_return; - - /* Free up the buffers used by _bfd_coff_link_input_bfd. */ - - coff_debug_merge_hash_table_free (&flaginfo.debug_merge); - debug_merge_allocated = FALSE; - - if (flaginfo.internal_syms != NULL) - { - free (flaginfo.internal_syms); - flaginfo.internal_syms = NULL; - } - if (flaginfo.sec_ptrs != NULL) - { - free (flaginfo.sec_ptrs); - flaginfo.sec_ptrs = NULL; - } - if (flaginfo.sym_indices != NULL) - { - free (flaginfo.sym_indices); - flaginfo.sym_indices = NULL; - } - if (flaginfo.linenos != NULL) - { - free (flaginfo.linenos); - flaginfo.linenos = NULL; - } - if (flaginfo.contents != NULL) - { - free (flaginfo.contents); - flaginfo.contents = NULL; - } - if (flaginfo.external_relocs != NULL) - { - free (flaginfo.external_relocs); - flaginfo.external_relocs = NULL; - } - if (flaginfo.internal_relocs != NULL) - { - free (flaginfo.internal_relocs); - flaginfo.internal_relocs = NULL; - } - - /* The value of the last C_FILE symbol is supposed to be the symbol - index of the first external symbol. Write it out again if - necessary. */ - if (flaginfo.last_file_index != -1 - && (unsigned int) flaginfo.last_file.n_value != obj_raw_syment_count (abfd)) - { - file_ptr pos; - - flaginfo.last_file.n_value = obj_raw_syment_count (abfd); - bfd_coff_swap_sym_out (abfd, &flaginfo.last_file, - flaginfo.outsyms); - - pos = obj_sym_filepos (abfd) + flaginfo.last_file_index * symesz; - if (bfd_seek (abfd, pos, SEEK_SET) != 0 - || bfd_bwrite (flaginfo.outsyms, symesz, abfd) != symesz) - return FALSE; - } - - /* If doing task linking (ld --task-link) then make a pass through the - global symbols, writing out any that are defined, and making them - static. */ - if (info->task_link) - { - flaginfo.failed = FALSE; - coff_link_hash_traverse (coff_hash_table (info), - _bfd_coff_write_task_globals, &flaginfo); - if (flaginfo.failed) - goto error_return; - } - - /* Write out the global symbols. */ - flaginfo.failed = FALSE; - bfd_hash_traverse (&info->hash->table, _bfd_coff_write_global_sym, &flaginfo); - if (flaginfo.failed) - goto error_return; - - /* The outsyms buffer is used by _bfd_coff_write_global_sym. */ - if (flaginfo.outsyms != NULL) - { - free (flaginfo.outsyms); - flaginfo.outsyms = NULL; - } - - if (info->relocatable && max_output_reloc_count > 0) - { - /* Now that we have written out all the global symbols, we know - the symbol indices to use for relocs against them, and we can - finally write out the relocs. */ - amt = max_output_reloc_count * relsz; - external_relocs = (bfd_byte *) bfd_malloc (amt); - if (external_relocs == NULL) - goto error_return; - - for (o = abfd->sections; o != NULL; o = o->next) - { - struct internal_reloc *irel; - struct internal_reloc *irelend; - struct coff_link_hash_entry **rel_hash; - bfd_byte *erel; - - if (o->reloc_count == 0) - continue; - - irel = flaginfo.section_info[o->target_index].relocs; - irelend = irel + o->reloc_count; - rel_hash = flaginfo.section_info[o->target_index].rel_hashes; - erel = external_relocs; - for (; irel < irelend; irel++, rel_hash++, erel += relsz) - { - if (*rel_hash != NULL) - { - BFD_ASSERT ((*rel_hash)->indx >= 0); - irel->r_symndx = (*rel_hash)->indx; - } - bfd_coff_swap_reloc_out (abfd, irel, erel); - } - - if (bfd_seek (abfd, o->rel_filepos, SEEK_SET) != 0) - goto error_return; - if (obj_pe (abfd) && o->reloc_count >= 0xffff) - { - /* In PE COFF, write the count of relocs as the first - reloc. The header overflow bit will be set - elsewhere. */ - struct internal_reloc incount; - bfd_byte *excount = (bfd_byte *)bfd_malloc (relsz); - - memset (&incount, 0, sizeof (incount)); - incount.r_vaddr = o->reloc_count + 1; - bfd_coff_swap_reloc_out (abfd, &incount, excount); - if (bfd_bwrite (excount, relsz, abfd) != relsz) - /* We'll leak, but it's an error anyway. */ - goto error_return; - free (excount); - } - if (bfd_bwrite (external_relocs, - (bfd_size_type) relsz * o->reloc_count, abfd) - != (bfd_size_type) relsz * o->reloc_count) - goto error_return; - } - - free (external_relocs); - external_relocs = NULL; - } - - /* Free up the section information. */ - if (flaginfo.section_info != NULL) - { - unsigned int i; - - for (i = 0; i < abfd->section_count; i++) - { - if (flaginfo.section_info[i].relocs != NULL) - free (flaginfo.section_info[i].relocs); - if (flaginfo.section_info[i].rel_hashes != NULL) - free (flaginfo.section_info[i].rel_hashes); - } - free (flaginfo.section_info); - flaginfo.section_info = NULL; - } - - /* If we have optimized stabs strings, output them. */ - if (coff_hash_table (info)->stab_info.stabstr != NULL) - { - if (! _bfd_write_stab_strings (abfd, &coff_hash_table (info)->stab_info)) - return FALSE; - } - - /* Write out the string table. */ - if (obj_raw_syment_count (abfd) != 0 || long_section_names) - { - file_ptr pos; - - pos = obj_sym_filepos (abfd) + obj_raw_syment_count (abfd) * symesz; - if (bfd_seek (abfd, pos, SEEK_SET) != 0) - return FALSE; - -#if STRING_SIZE_SIZE == 4 - H_PUT_32 (abfd, - _bfd_stringtab_size (flaginfo.strtab) + STRING_SIZE_SIZE, - strbuf); -#else - #error Change H_PUT_32 above -#endif - - if (bfd_bwrite (strbuf, (bfd_size_type) STRING_SIZE_SIZE, abfd) - != STRING_SIZE_SIZE) - return FALSE; - - if (! _bfd_stringtab_emit (abfd, flaginfo.strtab)) - return FALSE; - - obj_coff_strings_written (abfd) = TRUE; - } - - _bfd_stringtab_free (flaginfo.strtab); - - /* Setting bfd_get_symcount to 0 will cause write_object_contents to - not try to write out the symbols. */ - bfd_get_symcount (abfd) = 0; - - return TRUE; - - error_return: - if (debug_merge_allocated) - coff_debug_merge_hash_table_free (&flaginfo.debug_merge); - if (flaginfo.strtab != NULL) - _bfd_stringtab_free (flaginfo.strtab); - if (flaginfo.section_info != NULL) - { - unsigned int i; - - for (i = 0; i < abfd->section_count; i++) - { - if (flaginfo.section_info[i].relocs != NULL) - free (flaginfo.section_info[i].relocs); - if (flaginfo.section_info[i].rel_hashes != NULL) - free (flaginfo.section_info[i].rel_hashes); - } - free (flaginfo.section_info); - } - if (flaginfo.internal_syms != NULL) - free (flaginfo.internal_syms); - if (flaginfo.sec_ptrs != NULL) - free (flaginfo.sec_ptrs); - if (flaginfo.sym_indices != NULL) - free (flaginfo.sym_indices); - if (flaginfo.outsyms != NULL) - free (flaginfo.outsyms); - if (flaginfo.linenos != NULL) - free (flaginfo.linenos); - if (flaginfo.contents != NULL) - free (flaginfo.contents); - if (flaginfo.external_relocs != NULL) - free (flaginfo.external_relocs); - if (flaginfo.internal_relocs != NULL) - free (flaginfo.internal_relocs); - if (external_relocs != NULL) - free (external_relocs); - return FALSE; -} - -/* Parse out a -heap <reserved>,<commit> line. */ - -static char * -dores_com (char *ptr, bfd *output_bfd, int heap) -{ - if (coff_data(output_bfd)->pe) - { - int val = strtoul (ptr, &ptr, 0); - - if (heap) - pe_data(output_bfd)->pe_opthdr.SizeOfHeapReserve = val; - else - pe_data(output_bfd)->pe_opthdr.SizeOfStackReserve = val; - - if (ptr[0] == ',') - { - val = strtoul (ptr+1, &ptr, 0); - if (heap) - pe_data(output_bfd)->pe_opthdr.SizeOfHeapCommit = val; - else - pe_data(output_bfd)->pe_opthdr.SizeOfStackCommit = val; - } - } - return ptr; -} - -static char * -get_name (char *ptr, char **dst) -{ - while (*ptr == ' ') - ptr++; - *dst = ptr; - while (*ptr && *ptr != ' ') - ptr++; - *ptr = 0; - return ptr+1; -} - -/* Process any magic embedded commands in a section called .drectve. */ - -static int -process_embedded_commands (bfd *output_bfd, - struct bfd_link_info *info ATTRIBUTE_UNUSED, - bfd *abfd) -{ - asection *sec = bfd_get_section_by_name (abfd, ".drectve"); - char *s; - char *e; - bfd_byte *copy; - - if (!sec) - return 1; - - if (!bfd_malloc_and_get_section (abfd, sec, ©)) - { - if (copy != NULL) - free (copy); - return 0; - } - e = (char *) copy + sec->size; - - for (s = (char *) copy; s < e ; ) - { - if (s[0] != '-') - { - s++; - continue; - } - if (CONST_STRNEQ (s, "-attr")) - { - char *name; - char *attribs; - asection *asec; - int loop = 1; - int had_write = 0; - int had_exec= 0; - - s += 5; - s = get_name (s, &name); - s = get_name (s, &attribs); - - while (loop) - { - switch (*attribs++) - { - case 'W': - had_write = 1; - break; - case 'R': - break; - case 'S': - break; - case 'X': - had_exec = 1; - break; - default: - loop = 0; - } - } - asec = bfd_get_section_by_name (abfd, name); - if (asec) - { - if (had_exec) - asec->flags |= SEC_CODE; - if (!had_write) - asec->flags |= SEC_READONLY; - } - } - else if (CONST_STRNEQ (s, "-heap")) - s = dores_com (s + 5, output_bfd, 1); - - else if (CONST_STRNEQ (s, "-stack")) - s = dores_com (s + 6, output_bfd, 0); - - /* GNU extension for aligned commons. */ - else if (CONST_STRNEQ (s, "-aligncomm:")) - { - /* Common symbols must be aligned on reading, as it - is too late to do anything here, after they have - already been allocated, so just skip the directive. */ - s += 11; - } - - else - s++; - } - free (copy); - return 1; -} - -/* Place a marker against all symbols which are used by relocations. - This marker can be picked up by the 'do we skip this symbol ?' - loop in _bfd_coff_link_input_bfd() and used to prevent skipping - that symbol. */ - -static void -mark_relocs (struct coff_final_link_info *flaginfo, bfd *input_bfd) -{ - asection * a; - - if ((bfd_get_file_flags (input_bfd) & HAS_SYMS) == 0) - return; - - for (a = input_bfd->sections; a != (asection *) NULL; a = a->next) - { - struct internal_reloc * internal_relocs; - struct internal_reloc * irel; - struct internal_reloc * irelend; - - if ((a->flags & SEC_RELOC) == 0 || a->reloc_count < 1 - || a->linker_mark == 0) - continue; - /* Don't mark relocs in excluded sections. */ - if (a->output_section == bfd_abs_section_ptr) - continue; - - /* Read in the relocs. */ - internal_relocs = _bfd_coff_read_internal_relocs - (input_bfd, a, FALSE, - flaginfo->external_relocs, - flaginfo->info->relocatable, - (flaginfo->info->relocatable - ? (flaginfo->section_info[ a->output_section->target_index ].relocs + a->output_section->reloc_count) - : flaginfo->internal_relocs) - ); - - if (internal_relocs == NULL) - continue; - - irel = internal_relocs; - irelend = irel + a->reloc_count; - - /* Place a mark in the sym_indices array (whose entries have - been initialised to 0) for all of the symbols that are used - in the relocation table. This will then be picked up in the - skip/don't-skip pass. */ - for (; irel < irelend; irel++) - flaginfo->sym_indices[ irel->r_symndx ] = -1; - } -} - -/* Link an input file into the linker output file. This function - handles all the sections and relocations of the input file at once. */ - -bfd_boolean -_bfd_coff_link_input_bfd (struct coff_final_link_info *flaginfo, bfd *input_bfd) -{ - unsigned int n_tmask = coff_data (input_bfd)->local_n_tmask; - unsigned int n_btshft = coff_data (input_bfd)->local_n_btshft; - bfd_boolean (*adjust_symndx) - (bfd *, struct bfd_link_info *, bfd *, asection *, - struct internal_reloc *, bfd_boolean *); - bfd *output_bfd; - const char *strings; - bfd_size_type syment_base; - bfd_boolean copy, hash; - bfd_size_type isymesz; - bfd_size_type osymesz; - bfd_size_type linesz; - bfd_byte *esym; - bfd_byte *esym_end; - struct internal_syment *isymp; - asection **secpp; - long *indexp; - unsigned long output_index; - bfd_byte *outsym; - struct coff_link_hash_entry **sym_hash; - asection *o; - - /* Move all the symbols to the output file. */ - - output_bfd = flaginfo->output_bfd; - strings = NULL; - syment_base = obj_raw_syment_count (output_bfd); - isymesz = bfd_coff_symesz (input_bfd); - osymesz = bfd_coff_symesz (output_bfd); - linesz = bfd_coff_linesz (input_bfd); - BFD_ASSERT (linesz == bfd_coff_linesz (output_bfd)); - - copy = FALSE; - if (! flaginfo->info->keep_memory) - copy = TRUE; - hash = TRUE; - if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0) - hash = FALSE; - - if (! _bfd_coff_get_external_symbols (input_bfd)) - return FALSE; - - esym = (bfd_byte *) obj_coff_external_syms (input_bfd); - esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz; - isymp = flaginfo->internal_syms; - secpp = flaginfo->sec_ptrs; - indexp = flaginfo->sym_indices; - output_index = syment_base; - outsym = flaginfo->outsyms; - - if (coff_data (output_bfd)->pe - && ! process_embedded_commands (output_bfd, flaginfo->info, input_bfd)) - return FALSE; - - /* If we are going to perform relocations and also strip/discard some - symbols then we must make sure that we do not strip/discard those - symbols that are going to be involved in the relocations. */ - if (( flaginfo->info->strip != strip_none - || flaginfo->info->discard != discard_none) - && flaginfo->info->relocatable) - { - /* Mark the symbol array as 'not-used'. */ - memset (indexp, 0, obj_raw_syment_count (input_bfd) * sizeof * indexp); - - mark_relocs (flaginfo, input_bfd); - } - - while (esym < esym_end) - { - struct internal_syment isym; - enum coff_symbol_classification classification; - bfd_boolean skip; - bfd_boolean global; - bfd_boolean dont_skip_symbol; - int add; - - bfd_coff_swap_sym_in (input_bfd, esym, isymp); - - /* Make a copy of *isymp so that the relocate_section function - always sees the original values. This is more reliable than - always recomputing the symbol value even if we are stripping - the symbol. */ - isym = *isymp; - - classification = bfd_coff_classify_symbol (input_bfd, &isym); - switch (classification) - { - default: - abort (); - case COFF_SYMBOL_GLOBAL: - case COFF_SYMBOL_PE_SECTION: - case COFF_SYMBOL_LOCAL: - *secpp = coff_section_from_bfd_index (input_bfd, isym.n_scnum); - break; - case COFF_SYMBOL_COMMON: - *secpp = bfd_com_section_ptr; - break; - case COFF_SYMBOL_UNDEFINED: - *secpp = bfd_und_section_ptr; - break; - } - - /* Extract the flag indicating if this symbol is used by a - relocation. */ - if ((flaginfo->info->strip != strip_none - || flaginfo->info->discard != discard_none) - && flaginfo->info->relocatable) - dont_skip_symbol = *indexp; - else - dont_skip_symbol = FALSE; - - *indexp = -1; - - skip = FALSE; - global = FALSE; - add = 1 + isym.n_numaux; - - /* If we are stripping all symbols, we want to skip this one. */ - if (flaginfo->info->strip == strip_all && ! dont_skip_symbol) - skip = TRUE; - - if (! skip) - { - switch (classification) - { - default: - abort (); - case COFF_SYMBOL_GLOBAL: - case COFF_SYMBOL_COMMON: - case COFF_SYMBOL_PE_SECTION: - /* This is a global symbol. Global symbols come at the - end of the symbol table, so skip them for now. - Locally defined function symbols, however, are an - exception, and are not moved to the end. */ - global = TRUE; - if (! ISFCN (isym.n_type)) - skip = TRUE; - break; - - case COFF_SYMBOL_UNDEFINED: - /* Undefined symbols are left for the end. */ - global = TRUE; - skip = TRUE; - break; - - case COFF_SYMBOL_LOCAL: - /* This is a local symbol. Skip it if we are discarding - local symbols. */ - if (flaginfo->info->discard == discard_all && ! dont_skip_symbol) - skip = TRUE; - break; - } - } - -#ifndef COFF_WITH_PE - /* Skip section symbols for sections which are not going to be - emitted. */ - if (!skip - && !dont_skip_symbol - && isym.n_sclass == C_STAT - && isym.n_type == T_NULL - && isym.n_numaux > 0 - && ((*secpp)->output_section == bfd_abs_section_ptr - || bfd_section_removed_from_list (output_bfd, - (*secpp)->output_section))) - skip = TRUE; -#endif - - /* If we stripping debugging symbols, and this is a debugging - symbol, then skip it. FIXME: gas sets the section to N_ABS - for some types of debugging symbols; I don't know if this is - a bug or not. In any case, we handle it here. */ - if (! skip - && flaginfo->info->strip == strip_debugger - && ! dont_skip_symbol - && (isym.n_scnum == N_DEBUG - || (isym.n_scnum == N_ABS - && (isym.n_sclass == C_AUTO - || isym.n_sclass == C_REG - || isym.n_sclass == C_MOS - || isym.n_sclass == C_MOE - || isym.n_sclass == C_MOU - || isym.n_sclass == C_ARG - || isym.n_sclass == C_REGPARM - || isym.n_sclass == C_FIELD - || isym.n_sclass == C_EOS)))) - skip = TRUE; - - /* If some symbols are stripped based on the name, work out the - name and decide whether to skip this symbol. */ - if (! skip - && (flaginfo->info->strip == strip_some - || flaginfo->info->discard == discard_l)) - { - const char *name; - char buf[SYMNMLEN + 1]; - - name = _bfd_coff_internal_syment_name (input_bfd, &isym, buf); - if (name == NULL) - return FALSE; - - if (! dont_skip_symbol - && ((flaginfo->info->strip == strip_some - && (bfd_hash_lookup (flaginfo->info->keep_hash, name, FALSE, - FALSE) == NULL)) - || (! global - && flaginfo->info->discard == discard_l - && bfd_is_local_label_name (input_bfd, name)))) - skip = TRUE; - } - - /* If this is an enum, struct, or union tag, see if we have - already output an identical type. */ - if (! skip - && (flaginfo->output_bfd->flags & BFD_TRADITIONAL_FORMAT) == 0 - && (isym.n_sclass == C_ENTAG - || isym.n_sclass == C_STRTAG - || isym.n_sclass == C_UNTAG) - && isym.n_numaux == 1) - { - const char *name; - char buf[SYMNMLEN + 1]; - struct coff_debug_merge_hash_entry *mh; - struct coff_debug_merge_type *mt; - union internal_auxent aux; - struct coff_debug_merge_element **epp; - bfd_byte *esl, *eslend; - struct internal_syment *islp; - bfd_size_type amt; - - name = _bfd_coff_internal_syment_name (input_bfd, &isym, buf); - if (name == NULL) - return FALSE; - - /* Ignore fake names invented by compiler; treat them all as - the same name. */ - if (*name == '~' || *name == '.' || *name == '$' - || (*name == bfd_get_symbol_leading_char (input_bfd) - && (name[1] == '~' || name[1] == '.' || name[1] == '$'))) - name = ""; - - mh = coff_debug_merge_hash_lookup (&flaginfo->debug_merge, name, - TRUE, TRUE); - if (mh == NULL) - return FALSE; - - /* Allocate memory to hold type information. If this turns - out to be a duplicate, we pass this address to - bfd_release. */ - amt = sizeof (struct coff_debug_merge_type); - mt = (struct coff_debug_merge_type *) bfd_alloc (input_bfd, amt); - if (mt == NULL) - return FALSE; - mt->type_class = isym.n_sclass; - - /* Pick up the aux entry, which points to the end of the tag - entries. */ - bfd_coff_swap_aux_in (input_bfd, (esym + isymesz), - isym.n_type, isym.n_sclass, 0, isym.n_numaux, - &aux); - - /* Gather the elements. */ - epp = &mt->elements; - mt->elements = NULL; - islp = isymp + 2; - esl = esym + 2 * isymesz; - eslend = ((bfd_byte *) obj_coff_external_syms (input_bfd) - + aux.x_sym.x_fcnary.x_fcn.x_endndx.l * isymesz); - while (esl < eslend) - { - const char *elename; - char elebuf[SYMNMLEN + 1]; - char *name_copy; - - bfd_coff_swap_sym_in (input_bfd, esl, islp); - - amt = sizeof (struct coff_debug_merge_element); - *epp = (struct coff_debug_merge_element *) - bfd_alloc (input_bfd, amt); - if (*epp == NULL) - return FALSE; - - elename = _bfd_coff_internal_syment_name (input_bfd, islp, - elebuf); - if (elename == NULL) - return FALSE; - - amt = strlen (elename) + 1; - name_copy = (char *) bfd_alloc (input_bfd, amt); - if (name_copy == NULL) - return FALSE; - strcpy (name_copy, elename); - - (*epp)->name = name_copy; - (*epp)->type = islp->n_type; - (*epp)->tagndx = 0; - if (islp->n_numaux >= 1 - && islp->n_type != T_NULL - && islp->n_sclass != C_EOS) - { - union internal_auxent eleaux; - long indx; - - bfd_coff_swap_aux_in (input_bfd, (esl + isymesz), - islp->n_type, islp->n_sclass, 0, - islp->n_numaux, &eleaux); - indx = eleaux.x_sym.x_tagndx.l; - - /* FIXME: If this tagndx entry refers to a symbol - defined later in this file, we just ignore it. - Handling this correctly would be tedious, and may - not be required. */ - if (indx > 0 - && (indx - < ((esym - - (bfd_byte *) obj_coff_external_syms (input_bfd)) - / (long) isymesz))) - { - (*epp)->tagndx = flaginfo->sym_indices[indx]; - if ((*epp)->tagndx < 0) - (*epp)->tagndx = 0; - } - } - epp = &(*epp)->next; - *epp = NULL; - - esl += (islp->n_numaux + 1) * isymesz; - islp += islp->n_numaux + 1; - } - - /* See if we already have a definition which matches this - type. We always output the type if it has no elements, - for simplicity. */ - if (mt->elements == NULL) - bfd_release (input_bfd, mt); - else - { - struct coff_debug_merge_type *mtl; - - for (mtl = mh->types; mtl != NULL; mtl = mtl->next) - { - struct coff_debug_merge_element *me, *mel; - - if (mtl->type_class != mt->type_class) - continue; - - for (me = mt->elements, mel = mtl->elements; - me != NULL && mel != NULL; - me = me->next, mel = mel->next) - { - if (strcmp (me->name, mel->name) != 0 - || me->type != mel->type - || me->tagndx != mel->tagndx) - break; - } - - if (me == NULL && mel == NULL) - break; - } - - if (mtl == NULL || (bfd_size_type) mtl->indx >= syment_base) - { - /* This is the first definition of this type. */ - mt->indx = output_index; - mt->next = mh->types; - mh->types = mt; - } - else - { - /* This is a redefinition which can be merged. */ - bfd_release (input_bfd, mt); - *indexp = mtl->indx; - add = (eslend - esym) / isymesz; - skip = TRUE; - } - } - } - - /* We now know whether we are to skip this symbol or not. */ - if (! skip) - { - /* Adjust the symbol in order to output it. */ - - if (isym._n._n_n._n_zeroes == 0 - && isym._n._n_n._n_offset != 0) - { - const char *name; - bfd_size_type indx; - - /* This symbol has a long name. Enter it in the string - table we are building. Note that we do not check - bfd_coff_symname_in_debug. That is only true for - XCOFF, and XCOFF requires different linking code - anyhow. */ - name = _bfd_coff_internal_syment_name (input_bfd, &isym, NULL); - if (name == NULL) - return FALSE; - indx = _bfd_stringtab_add (flaginfo->strtab, name, hash, copy); - if (indx == (bfd_size_type) -1) - return FALSE; - isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx; - } - - switch (isym.n_sclass) - { - case C_AUTO: - case C_MOS: - case C_EOS: - case C_MOE: - case C_MOU: - case C_UNTAG: - case C_STRTAG: - case C_ENTAG: - case C_TPDEF: - case C_ARG: - case C_USTATIC: - case C_REG: - case C_REGPARM: - case C_FIELD: - /* The symbol value should not be modified. */ - break; - - case C_FCN: - if (obj_pe (input_bfd) - && strcmp (isym.n_name, ".bf") != 0 - && isym.n_scnum > 0) - { - /* For PE, .lf and .ef get their value left alone, - while .bf gets relocated. However, they all have - "real" section numbers, and need to be moved into - the new section. */ - isym.n_scnum = (*secpp)->output_section->target_index; - break; - } - /* Fall through. */ - default: - case C_LABEL: /* Not completely sure about these 2 */ - case C_EXTDEF: - case C_BLOCK: - case C_EFCN: - case C_NULL: - case C_EXT: - case C_STAT: - case C_SECTION: - case C_NT_WEAK: - /* Compute new symbol location. */ - if (isym.n_scnum > 0) - { - isym.n_scnum = (*secpp)->output_section->target_index; - isym.n_value += (*secpp)->output_offset; - if (! obj_pe (input_bfd)) - isym.n_value -= (*secpp)->vma; - if (! obj_pe (flaginfo->output_bfd)) - isym.n_value += (*secpp)->output_section->vma; - } - break; - - case C_FILE: - /* The value of a C_FILE symbol is the symbol index of - the next C_FILE symbol. The value of the last C_FILE - symbol is the symbol index to the first external - symbol (actually, coff_renumber_symbols does not get - this right--it just sets the value of the last C_FILE - symbol to zero--and nobody has ever complained about - it). We try to get this right, below, just before we - write the symbols out, but in the general case we may - have to write the symbol out twice. */ - if (flaginfo->last_file_index != -1 - && flaginfo->last_file.n_value != (bfd_vma) output_index) - { - /* We must correct the value of the last C_FILE - entry. */ - flaginfo->last_file.n_value = output_index; - if ((bfd_size_type) flaginfo->last_file_index >= syment_base) - { - /* The last C_FILE symbol is in this input file. */ - bfd_coff_swap_sym_out (output_bfd, - &flaginfo->last_file, - (flaginfo->outsyms - + ((flaginfo->last_file_index - - syment_base) - * osymesz))); - } - else - { - file_ptr pos; - - /* We have already written out the last C_FILE - symbol. We need to write it out again. We - borrow *outsym temporarily. */ - bfd_coff_swap_sym_out (output_bfd, - &flaginfo->last_file, outsym); - pos = obj_sym_filepos (output_bfd); - pos += flaginfo->last_file_index * osymesz; - if (bfd_seek (output_bfd, pos, SEEK_SET) != 0 - || bfd_bwrite (outsym, osymesz, output_bfd) != osymesz) - return FALSE; - } - } - - flaginfo->last_file_index = output_index; - flaginfo->last_file = isym; - break; - } - - /* If doing task linking, convert normal global function symbols to - static functions. */ - if (flaginfo->info->task_link && IS_EXTERNAL (input_bfd, isym)) - isym.n_sclass = C_STAT; - - /* Output the symbol. */ - bfd_coff_swap_sym_out (output_bfd, &isym, outsym); - - *indexp = output_index; - - if (global) - { - long indx; - struct coff_link_hash_entry *h; - - indx = ((esym - (bfd_byte *) obj_coff_external_syms (input_bfd)) - / isymesz); - h = obj_coff_sym_hashes (input_bfd)[indx]; - if (h == NULL) - { - /* This can happen if there were errors earlier in - the link. */ - bfd_set_error (bfd_error_bad_value); - return FALSE; - } - h->indx = output_index; - } - - output_index += add; - outsym += add * osymesz; - } - - esym += add * isymesz; - isymp += add; - ++secpp; - ++indexp; - for (--add; add > 0; --add) - { - *secpp++ = NULL; - *indexp++ = -1; - } - } - - /* Fix up the aux entries. This must be done in a separate pass, - because we don't know the correct symbol indices until we have - already decided which symbols we are going to keep. */ - esym = (bfd_byte *) obj_coff_external_syms (input_bfd); - esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz; - isymp = flaginfo->internal_syms; - indexp = flaginfo->sym_indices; - sym_hash = obj_coff_sym_hashes (input_bfd); - outsym = flaginfo->outsyms; - - while (esym < esym_end) - { - int add; - - add = 1 + isymp->n_numaux; - - if ((*indexp < 0 - || (bfd_size_type) *indexp < syment_base) - && (*sym_hash == NULL - || (*sym_hash)->auxbfd != input_bfd)) - esym += add * isymesz; - else - { - struct coff_link_hash_entry *h; - int i; - - h = NULL; - if (*indexp < 0) - { - h = *sym_hash; - - /* The m68k-motorola-sysv assembler will sometimes - generate two symbols with the same name, but only one - will have aux entries. */ - BFD_ASSERT (isymp->n_numaux == 0 - || h->numaux == 0 - || h->numaux == isymp->n_numaux); - } - - esym += isymesz; - - if (h == NULL) - outsym += osymesz; - - /* Handle the aux entries. This handling is based on - coff_pointerize_aux. I don't know if it always correct. */ - for (i = 0; i < isymp->n_numaux && esym < esym_end; i++) - { - union internal_auxent aux; - union internal_auxent *auxp; - - if (h != NULL && h->aux != NULL && (h->numaux > i)) - auxp = h->aux + i; - else - { - bfd_coff_swap_aux_in (input_bfd, esym, isymp->n_type, - isymp->n_sclass, i, isymp->n_numaux, &aux); - auxp = &aux; - } - - if (isymp->n_sclass == C_FILE) - { - /* If this is a long filename, we must put it in the - string table. */ - if (auxp->x_file.x_n.x_zeroes == 0 - && auxp->x_file.x_n.x_offset != 0) - { - const char *filename; - bfd_size_type indx; - - BFD_ASSERT (auxp->x_file.x_n.x_offset - >= STRING_SIZE_SIZE); - if (strings == NULL) - { - strings = _bfd_coff_read_string_table (input_bfd); - if (strings == NULL) - return FALSE; - } - filename = strings + auxp->x_file.x_n.x_offset; - indx = _bfd_stringtab_add (flaginfo->strtab, filename, - hash, copy); - if (indx == (bfd_size_type) -1) - return FALSE; - auxp->x_file.x_n.x_offset = STRING_SIZE_SIZE + indx; - } - } - else if ((isymp->n_sclass != C_STAT || isymp->n_type != T_NULL) - && isymp->n_sclass != C_NT_WEAK) - { - unsigned long indx; - - if (ISFCN (isymp->n_type) - || ISTAG (isymp->n_sclass) - || isymp->n_sclass == C_BLOCK - || isymp->n_sclass == C_FCN) - { - indx = auxp->x_sym.x_fcnary.x_fcn.x_endndx.l; - if (indx > 0 - && indx < obj_raw_syment_count (input_bfd)) - { - /* We look forward through the symbol for - the index of the next symbol we are going - to include. I don't know if this is - entirely right. */ - while ((flaginfo->sym_indices[indx] < 0 - || ((bfd_size_type) flaginfo->sym_indices[indx] - < syment_base)) - && indx < obj_raw_syment_count (input_bfd)) - ++indx; - if (indx >= obj_raw_syment_count (input_bfd)) - indx = output_index; - else - indx = flaginfo->sym_indices[indx]; - auxp->x_sym.x_fcnary.x_fcn.x_endndx.l = indx; - } - } - - indx = auxp->x_sym.x_tagndx.l; - if (indx > 0 && indx < obj_raw_syment_count (input_bfd)) - { - long symindx; - - symindx = flaginfo->sym_indices[indx]; - if (symindx < 0) - auxp->x_sym.x_tagndx.l = 0; - else - auxp->x_sym.x_tagndx.l = symindx; - } - - /* The .bf symbols are supposed to be linked through - the endndx field. We need to carry this list - across object files. */ - if (i == 0 - && h == NULL - && isymp->n_sclass == C_FCN - && (isymp->_n._n_n._n_zeroes != 0 - || isymp->_n._n_n._n_offset == 0) - && isymp->_n._n_name[0] == '.' - && isymp->_n._n_name[1] == 'b' - && isymp->_n._n_name[2] == 'f' - && isymp->_n._n_name[3] == '\0') - { - if (flaginfo->last_bf_index != -1) - { - flaginfo->last_bf.x_sym.x_fcnary.x_fcn.x_endndx.l = - *indexp; - - if ((bfd_size_type) flaginfo->last_bf_index - >= syment_base) - { - void *auxout; - - /* The last .bf symbol is in this input - file. This will only happen if the - assembler did not set up the .bf - endndx symbols correctly. */ - auxout = (flaginfo->outsyms - + ((flaginfo->last_bf_index - - syment_base) - * osymesz)); - - bfd_coff_swap_aux_out (output_bfd, - &flaginfo->last_bf, - isymp->n_type, - isymp->n_sclass, - 0, isymp->n_numaux, - auxout); - } - else - { - file_ptr pos; - - /* We have already written out the last - .bf aux entry. We need to write it - out again. We borrow *outsym - temporarily. FIXME: This case should - be made faster. */ - bfd_coff_swap_aux_out (output_bfd, - &flaginfo->last_bf, - isymp->n_type, - isymp->n_sclass, - 0, isymp->n_numaux, - outsym); - pos = obj_sym_filepos (output_bfd); - pos += flaginfo->last_bf_index * osymesz; - if (bfd_seek (output_bfd, pos, SEEK_SET) != 0 - || (bfd_bwrite (outsym, osymesz, output_bfd) - != osymesz)) - return FALSE; - } - } - - if (auxp->x_sym.x_fcnary.x_fcn.x_endndx.l != 0) - flaginfo->last_bf_index = -1; - else - { - /* The endndx field of this aux entry must - be updated with the symbol number of the - next .bf symbol. */ - flaginfo->last_bf = *auxp; - flaginfo->last_bf_index = (((outsym - flaginfo->outsyms) - / osymesz) - + syment_base); - } - } - } - - if (h == NULL) - { - bfd_coff_swap_aux_out (output_bfd, auxp, isymp->n_type, - isymp->n_sclass, i, isymp->n_numaux, - outsym); - outsym += osymesz; - } - - esym += isymesz; - } - } - - indexp += add; - isymp += add; - sym_hash += add; - } - - /* Relocate the line numbers, unless we are stripping them. */ - if (flaginfo->info->strip == strip_none - || flaginfo->info->strip == strip_some) - { - for (o = input_bfd->sections; o != NULL; o = o->next) - { - bfd_vma offset; - bfd_byte *eline; - bfd_byte *elineend; - bfd_byte *oeline; - bfd_boolean skipping; - file_ptr pos; - bfd_size_type amt; - - /* FIXME: If SEC_HAS_CONTENTS is not for the section, then - build_link_order in ldwrite.c will not have created a - link order, which means that we will not have seen this - input section in _bfd_coff_final_link, which means that - we will not have allocated space for the line numbers of - this section. I don't think line numbers can be - meaningful for a section which does not have - SEC_HAS_CONTENTS set, but, if they do, this must be - changed. */ - if (o->lineno_count == 0 - || (o->output_section->flags & SEC_HAS_CONTENTS) == 0) - continue; - - if (bfd_seek (input_bfd, o->line_filepos, SEEK_SET) != 0 - || bfd_bread (flaginfo->linenos, linesz * o->lineno_count, - input_bfd) != linesz * o->lineno_count) - return FALSE; - - offset = o->output_section->vma + o->output_offset - o->vma; - eline = flaginfo->linenos; - oeline = flaginfo->linenos; - elineend = eline + linesz * o->lineno_count; - skipping = FALSE; - for (; eline < elineend; eline += linesz) - { - struct internal_lineno iline; - - bfd_coff_swap_lineno_in (input_bfd, eline, &iline); - - if (iline.l_lnno != 0) - iline.l_addr.l_paddr += offset; - else if (iline.l_addr.l_symndx >= 0 - && ((unsigned long) iline.l_addr.l_symndx - < obj_raw_syment_count (input_bfd))) - { - long indx; - - indx = flaginfo->sym_indices[iline.l_addr.l_symndx]; - - if (indx < 0) - { - /* These line numbers are attached to a symbol - which we are stripping. We must discard the - line numbers because reading them back with - no associated symbol (or associating them all - with symbol #0) will fail. We can't regain - the space in the output file, but at least - they're dense. */ - skipping = TRUE; - } - else - { - struct internal_syment is; - union internal_auxent ia; - - /* Fix up the lnnoptr field in the aux entry of - the symbol. It turns out that we can't do - this when we modify the symbol aux entries, - because gas sometimes screws up the lnnoptr - field and makes it an offset from the start - of the line numbers rather than an absolute - file index. */ - bfd_coff_swap_sym_in (output_bfd, - (flaginfo->outsyms - + ((indx - syment_base) - * osymesz)), &is); - if ((ISFCN (is.n_type) - || is.n_sclass == C_BLOCK) - && is.n_numaux >= 1) - { - void *auxptr; - - auxptr = (flaginfo->outsyms - + ((indx - syment_base + 1) - * osymesz)); - bfd_coff_swap_aux_in (output_bfd, auxptr, - is.n_type, is.n_sclass, - 0, is.n_numaux, &ia); - ia.x_sym.x_fcnary.x_fcn.x_lnnoptr = - (o->output_section->line_filepos - + o->output_section->lineno_count * linesz - + eline - flaginfo->linenos); - bfd_coff_swap_aux_out (output_bfd, &ia, - is.n_type, is.n_sclass, 0, - is.n_numaux, auxptr); - } - - skipping = FALSE; - } - - iline.l_addr.l_symndx = indx; - } - - if (!skipping) - { - bfd_coff_swap_lineno_out (output_bfd, &iline, oeline); - oeline += linesz; - } - } - - pos = o->output_section->line_filepos; - pos += o->output_section->lineno_count * linesz; - amt = oeline - flaginfo->linenos; - if (bfd_seek (output_bfd, pos, SEEK_SET) != 0 - || bfd_bwrite (flaginfo->linenos, amt, output_bfd) != amt) - return FALSE; - - o->output_section->lineno_count += amt / linesz; - } - } - - /* If we swapped out a C_FILE symbol, guess that the next C_FILE - symbol will be the first symbol in the next input file. In the - normal case, this will save us from writing out the C_FILE symbol - again. */ - if (flaginfo->last_file_index != -1 - && (bfd_size_type) flaginfo->last_file_index >= syment_base) - { - flaginfo->last_file.n_value = output_index; - bfd_coff_swap_sym_out (output_bfd, &flaginfo->last_file, - (flaginfo->outsyms - + ((flaginfo->last_file_index - syment_base) - * osymesz))); - } - - /* Write the modified symbols to the output file. */ - if (outsym > flaginfo->outsyms) - { - file_ptr pos; - bfd_size_type amt; - - pos = obj_sym_filepos (output_bfd) + syment_base * osymesz; - amt = outsym - flaginfo->outsyms; - if (bfd_seek (output_bfd, pos, SEEK_SET) != 0 - || bfd_bwrite (flaginfo->outsyms, amt, output_bfd) != amt) - return FALSE; - - BFD_ASSERT ((obj_raw_syment_count (output_bfd) - + (outsym - flaginfo->outsyms) / osymesz) - == output_index); - - obj_raw_syment_count (output_bfd) = output_index; - } - - /* Relocate the contents of each section. */ - adjust_symndx = coff_backend_info (input_bfd)->_bfd_coff_adjust_symndx; - for (o = input_bfd->sections; o != NULL; o = o->next) - { - bfd_byte *contents; - struct coff_section_tdata *secdata; - - if (! o->linker_mark) - /* This section was omitted from the link. */ - continue; - - if ((o->flags & SEC_LINKER_CREATED) != 0) - continue; - - if ((o->flags & SEC_HAS_CONTENTS) == 0 - || (o->size == 0 && (o->flags & SEC_RELOC) == 0)) - { - if ((o->flags & SEC_RELOC) != 0 - && o->reloc_count != 0) - { - (*_bfd_error_handler) - (_("%B: relocs in section `%A', but it has no contents"), - input_bfd, o); - bfd_set_error (bfd_error_no_contents); - return FALSE; - } - - continue; - } - - secdata = coff_section_data (input_bfd, o); - if (secdata != NULL && secdata->contents != NULL) - contents = secdata->contents; - else - { - contents = flaginfo->contents; - if (! bfd_get_full_section_contents (input_bfd, o, &contents)) - return FALSE; - } - - if ((o->flags & SEC_RELOC) != 0) - { - int target_index; - struct internal_reloc *internal_relocs; - struct internal_reloc *irel; - - /* Read in the relocs. */ - target_index = o->output_section->target_index; - internal_relocs = (_bfd_coff_read_internal_relocs - (input_bfd, o, FALSE, flaginfo->external_relocs, - flaginfo->info->relocatable, - (flaginfo->info->relocatable - ? (flaginfo->section_info[target_index].relocs - + o->output_section->reloc_count) - : flaginfo->internal_relocs))); - if (internal_relocs == NULL - && o->reloc_count > 0) - return FALSE; - - /* Run through the relocs looking for relocs against symbols - coming from discarded sections and complain about them. */ - irel = internal_relocs; - for (; irel < &internal_relocs[o->reloc_count]; irel++) - { - struct coff_link_hash_entry *h; - asection *ps = NULL; - long symndx = irel->r_symndx; - if (symndx < 0) - continue; - h = obj_coff_sym_hashes (input_bfd)[symndx]; - if (h == NULL) - continue; - while (h->root.type == bfd_link_hash_indirect - || h->root.type == bfd_link_hash_warning) - h = (struct coff_link_hash_entry *) h->root.u.i.link; - if (h->root.type == bfd_link_hash_defined - || h->root.type == bfd_link_hash_defweak) - ps = h->root.u.def.section; - if (ps == NULL) - continue; - /* Complain if definition comes from an excluded section. */ - if (ps->flags & SEC_EXCLUDE) - (*flaginfo->info->callbacks->einfo) - (_("%X`%s' referenced in section `%A' of %B: " - "defined in discarded section `%A' of %B\n"), - h->root.root.string, o, input_bfd, ps, ps->owner); - } - - /* Call processor specific code to relocate the section - contents. */ - if (! bfd_coff_relocate_section (output_bfd, flaginfo->info, - input_bfd, o, - contents, - internal_relocs, - flaginfo->internal_syms, - flaginfo->sec_ptrs)) - return FALSE; - - if (flaginfo->info->relocatable) - { - bfd_vma offset; - struct internal_reloc *irelend; - struct coff_link_hash_entry **rel_hash; - - offset = o->output_section->vma + o->output_offset - o->vma; - irel = internal_relocs; - irelend = irel + o->reloc_count; - rel_hash = (flaginfo->section_info[target_index].rel_hashes - + o->output_section->reloc_count); - for (; irel < irelend; irel++, rel_hash++) - { - struct coff_link_hash_entry *h; - bfd_boolean adjusted; - - *rel_hash = NULL; - - /* Adjust the reloc address and symbol index. */ - irel->r_vaddr += offset; - - if (irel->r_symndx == -1) - continue; - - if (adjust_symndx) - { - if (! (*adjust_symndx) (output_bfd, flaginfo->info, - input_bfd, o, irel, - &adjusted)) - return FALSE; - if (adjusted) - continue; - } - - h = obj_coff_sym_hashes (input_bfd)[irel->r_symndx]; - if (h != NULL) - { - /* This is a global symbol. */ - if (h->indx >= 0) - irel->r_symndx = h->indx; - else - { - /* This symbol is being written at the end - of the file, and we do not yet know the - symbol index. We save the pointer to the - hash table entry in the rel_hash list. - We set the indx field to -2 to indicate - that this symbol must not be stripped. */ - *rel_hash = h; - h->indx = -2; - } - } - else - { - long indx; - - indx = flaginfo->sym_indices[irel->r_symndx]; - if (indx != -1) - irel->r_symndx = indx; - else - { - struct internal_syment *is; - const char *name; - char buf[SYMNMLEN + 1]; - - /* This reloc is against a symbol we are - stripping. This should have been handled - by the 'dont_skip_symbol' code in the while - loop at the top of this function. */ - is = flaginfo->internal_syms + irel->r_symndx; - - name = (_bfd_coff_internal_syment_name - (input_bfd, is, buf)); - if (name == NULL) - return FALSE; - - if (! ((*flaginfo->info->callbacks->unattached_reloc) - (flaginfo->info, name, input_bfd, o, - irel->r_vaddr))) - return FALSE; - } - } - } - - o->output_section->reloc_count += o->reloc_count; - } - } - - /* Write out the modified section contents. */ - if (secdata == NULL || secdata->stab_info == NULL) - { - file_ptr loc = o->output_offset * bfd_octets_per_byte (output_bfd); - if (! bfd_set_section_contents (output_bfd, o->output_section, - contents, loc, o->size)) - return FALSE; - } - else - { - if (! (_bfd_write_section_stabs - (output_bfd, &coff_hash_table (flaginfo->info)->stab_info, - o, &secdata->stab_info, contents))) - return FALSE; - } - } - - if (! flaginfo->info->keep_memory - && ! _bfd_coff_free_symbols (input_bfd)) - return FALSE; - - return TRUE; -} - -/* Write out a global symbol. Called via bfd_hash_traverse. */ - -bfd_boolean -_bfd_coff_write_global_sym (struct bfd_hash_entry *bh, void *data) -{ - struct coff_link_hash_entry *h = (struct coff_link_hash_entry *) bh; - struct coff_final_link_info *flaginfo = (struct coff_final_link_info *) data; - bfd *output_bfd; - struct internal_syment isym; - bfd_size_type symesz; - unsigned int i; - file_ptr pos; - - output_bfd = flaginfo->output_bfd; - - if (h->root.type == bfd_link_hash_warning) - { - h = (struct coff_link_hash_entry *) h->root.u.i.link; - if (h->root.type == bfd_link_hash_new) - return TRUE; - } - - if (h->indx >= 0) - return TRUE; - - if (h->indx != -2 - && (flaginfo->info->strip == strip_all - || (flaginfo->info->strip == strip_some - && (bfd_hash_lookup (flaginfo->info->keep_hash, - h->root.root.string, FALSE, FALSE) - == NULL)))) - return TRUE; - - switch (h->root.type) - { - default: - case bfd_link_hash_new: - case bfd_link_hash_warning: - abort (); - return FALSE; - - case bfd_link_hash_undefined: - case bfd_link_hash_undefweak: - isym.n_scnum = N_UNDEF; - isym.n_value = 0; - break; - - case bfd_link_hash_defined: - case bfd_link_hash_defweak: - { - asection *sec; - - sec = h->root.u.def.section->output_section; - if (bfd_is_abs_section (sec)) - isym.n_scnum = N_ABS; - else - isym.n_scnum = sec->target_index; - isym.n_value = (h->root.u.def.value - + h->root.u.def.section->output_offset); - if (! obj_pe (flaginfo->output_bfd)) - isym.n_value += sec->vma; - } - break; - - case bfd_link_hash_common: - isym.n_scnum = N_UNDEF; - isym.n_value = h->root.u.c.size; - break; - - case bfd_link_hash_indirect: - /* Just ignore these. They can't be handled anyhow. */ - return TRUE; - } - - if (strlen (h->root.root.string) <= SYMNMLEN) - strncpy (isym._n._n_name, h->root.root.string, SYMNMLEN); - else - { - bfd_boolean hash; - bfd_size_type indx; - - hash = TRUE; - if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0) - hash = FALSE; - indx = _bfd_stringtab_add (flaginfo->strtab, h->root.root.string, hash, - FALSE); - if (indx == (bfd_size_type) -1) - { - flaginfo->failed = TRUE; - return FALSE; - } - isym._n._n_n._n_zeroes = 0; - isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx; - } - - isym.n_sclass = h->symbol_class; - isym.n_type = h->type; - - if (isym.n_sclass == C_NULL) - isym.n_sclass = C_EXT; - - /* If doing task linking and this is the pass where we convert - defined globals to statics, then do that conversion now. If the - symbol is not being converted, just ignore it and it will be - output during a later pass. */ - if (flaginfo->global_to_static) - { - if (! IS_EXTERNAL (output_bfd, isym)) - return TRUE; - - isym.n_sclass = C_STAT; - } - - /* When a weak symbol is not overridden by a strong one, - turn it into an external symbol when not building a - shared or relocatable object. */ - if (! flaginfo->info->shared - && ! flaginfo->info->relocatable - && IS_WEAK_EXTERNAL (flaginfo->output_bfd, isym)) - isym.n_sclass = C_EXT; - - isym.n_numaux = h->numaux; - - bfd_coff_swap_sym_out (output_bfd, &isym, flaginfo->outsyms); - - symesz = bfd_coff_symesz (output_bfd); - - pos = obj_sym_filepos (output_bfd); - pos += obj_raw_syment_count (output_bfd) * symesz; - if (bfd_seek (output_bfd, pos, SEEK_SET) != 0 - || bfd_bwrite (flaginfo->outsyms, symesz, output_bfd) != symesz) - { - flaginfo->failed = TRUE; - return FALSE; - } - - h->indx = obj_raw_syment_count (output_bfd); - - ++obj_raw_syment_count (output_bfd); - - /* Write out any associated aux entries. Most of the aux entries - will have been modified in _bfd_coff_link_input_bfd. We have to - handle section aux entries here, now that we have the final - relocation and line number counts. */ - for (i = 0; i < isym.n_numaux; i++) - { - union internal_auxent *auxp; - - auxp = h->aux + i; - - /* Look for a section aux entry here using the same tests that - coff_swap_aux_out uses. */ - if (i == 0 - && (isym.n_sclass == C_STAT - || isym.n_sclass == C_HIDDEN) - && isym.n_type == T_NULL - && (h->root.type == bfd_link_hash_defined - || h->root.type == bfd_link_hash_defweak)) - { - asection *sec; - - sec = h->root.u.def.section->output_section; - if (sec != NULL) - { - auxp->x_scn.x_scnlen = sec->size; - - /* For PE, an overflow on the final link reportedly does - not matter. FIXME: Why not? */ - if (sec->reloc_count > 0xffff - && (! obj_pe (output_bfd) - || flaginfo->info->relocatable)) - (*_bfd_error_handler) - (_("%s: %s: reloc overflow: 0x%lx > 0xffff"), - bfd_get_filename (output_bfd), - bfd_get_section_name (output_bfd, sec), - sec->reloc_count); - - if (sec->lineno_count > 0xffff - && (! obj_pe (output_bfd) - || flaginfo->info->relocatable)) - (*_bfd_error_handler) - (_("%s: warning: %s: line number overflow: 0x%lx > 0xffff"), - bfd_get_filename (output_bfd), - bfd_get_section_name (output_bfd, sec), - sec->lineno_count); - - auxp->x_scn.x_nreloc = sec->reloc_count; - auxp->x_scn.x_nlinno = sec->lineno_count; - auxp->x_scn.x_checksum = 0; - auxp->x_scn.x_associated = 0; - auxp->x_scn.x_comdat = 0; - } - } - - bfd_coff_swap_aux_out (output_bfd, auxp, isym.n_type, - isym.n_sclass, (int) i, isym.n_numaux, - flaginfo->outsyms); - if (bfd_bwrite (flaginfo->outsyms, symesz, output_bfd) != symesz) - { - flaginfo->failed = TRUE; - return FALSE; - } - ++obj_raw_syment_count (output_bfd); - } - - return TRUE; -} - -/* Write out task global symbols, converting them to statics. Called - via coff_link_hash_traverse. Calls bfd_coff_write_global_sym to do - the dirty work, if the symbol we are processing needs conversion. */ - -bfd_boolean -_bfd_coff_write_task_globals (struct coff_link_hash_entry *h, void *data) -{ - struct coff_final_link_info *flaginfo = (struct coff_final_link_info *) data; - bfd_boolean rtnval = TRUE; - bfd_boolean save_global_to_static; - - if (h->root.type == bfd_link_hash_warning) - h = (struct coff_link_hash_entry *) h->root.u.i.link; - - if (h->indx < 0) - { - switch (h->root.type) - { - case bfd_link_hash_defined: - case bfd_link_hash_defweak: - save_global_to_static = flaginfo->global_to_static; - flaginfo->global_to_static = TRUE; - rtnval = _bfd_coff_write_global_sym (&h->root.root, data); - flaginfo->global_to_static = save_global_to_static; - break; - default: - break; - } - } - return (rtnval); -} - -/* Handle a link order which is supposed to generate a reloc. */ - -bfd_boolean -_bfd_coff_reloc_link_order (bfd *output_bfd, - struct coff_final_link_info *flaginfo, - asection *output_section, - struct bfd_link_order *link_order) -{ - reloc_howto_type *howto; - struct internal_reloc *irel; - struct coff_link_hash_entry **rel_hash_ptr; - - howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc); - if (howto == NULL) - { - bfd_set_error (bfd_error_bad_value); - return FALSE; - } - - if (link_order->u.reloc.p->addend != 0) - { - bfd_size_type size; - bfd_byte *buf; - bfd_reloc_status_type rstat; - bfd_boolean ok; - file_ptr loc; - - size = bfd_get_reloc_size (howto); - buf = (bfd_byte *) bfd_zmalloc (size); - if (buf == NULL) - return FALSE; - - rstat = _bfd_relocate_contents (howto, output_bfd, - (bfd_vma) link_order->u.reloc.p->addend,\ - buf); - switch (rstat) - { - case bfd_reloc_ok: - break; - default: - case bfd_reloc_outofrange: - abort (); - case bfd_reloc_overflow: - if (! ((*flaginfo->info->callbacks->reloc_overflow) - (flaginfo->info, NULL, - (link_order->type == bfd_section_reloc_link_order - ? bfd_section_name (output_bfd, - link_order->u.reloc.p->u.section) - : link_order->u.reloc.p->u.name), - howto->name, link_order->u.reloc.p->addend, - (bfd *) NULL, (asection *) NULL, (bfd_vma) 0))) - { - free (buf); - return FALSE; - } - break; - } - loc = link_order->offset * bfd_octets_per_byte (output_bfd); - ok = bfd_set_section_contents (output_bfd, output_section, buf, - loc, size); - free (buf); - if (! ok) - return FALSE; - } - - /* Store the reloc information in the right place. It will get - swapped and written out at the end of the final_link routine. */ - irel = (flaginfo->section_info[output_section->target_index].relocs - + output_section->reloc_count); - rel_hash_ptr = (flaginfo->section_info[output_section->target_index].rel_hashes - + output_section->reloc_count); - - memset (irel, 0, sizeof (struct internal_reloc)); - *rel_hash_ptr = NULL; - - irel->r_vaddr = output_section->vma + link_order->offset; - - if (link_order->type == bfd_section_reloc_link_order) - { - /* We need to somehow locate a symbol in the right section. The - symbol must either have a value of zero, or we must adjust - the addend by the value of the symbol. FIXME: Write this - when we need it. The old linker couldn't handle this anyhow. */ - abort (); - *rel_hash_ptr = NULL; - irel->r_symndx = 0; - } - else - { - struct coff_link_hash_entry *h; - - h = ((struct coff_link_hash_entry *) - bfd_wrapped_link_hash_lookup (output_bfd, flaginfo->info, - link_order->u.reloc.p->u.name, - FALSE, FALSE, TRUE)); - if (h != NULL) - { - if (h->indx >= 0) - irel->r_symndx = h->indx; - else - { - /* Set the index to -2 to force this symbol to get - written out. */ - h->indx = -2; - *rel_hash_ptr = h; - irel->r_symndx = 0; - } - } - else - { - if (! ((*flaginfo->info->callbacks->unattached_reloc) - (flaginfo->info, link_order->u.reloc.p->u.name, (bfd *) NULL, - (asection *) NULL, (bfd_vma) 0))) - return FALSE; - irel->r_symndx = 0; - } - } - - /* FIXME: Is this always right? */ - irel->r_type = howto->type; - - /* r_size is only used on the RS/6000, which needs its own linker - routines anyhow. r_extern is only used for ECOFF. */ - - /* FIXME: What is the right value for r_offset? Is zero OK? */ - ++output_section->reloc_count; - - return TRUE; -} - -/* A basic reloc handling routine which may be used by processors with - simple relocs. */ - -bfd_boolean -_bfd_coff_generic_relocate_section (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; - - rel = relocs; - relend = rel + input_section->reloc_count; - for (; rel < relend; rel++) - { - long symndx; - struct coff_link_hash_entry *h; - struct internal_syment *sym; - bfd_vma addend; - bfd_vma val; - reloc_howto_type *howto; - bfd_reloc_status_type rstat; - - symndx = rel->r_symndx; - - if (symndx == -1) - { - h = NULL; - sym = NULL; - } - else if (symndx < 0 - || (unsigned long) symndx >= obj_raw_syment_count (input_bfd)) - { - (*_bfd_error_handler) - ("%B: illegal symbol index %ld in relocs", input_bfd, symndx); - return FALSE; - } - else - { - h = obj_coff_sym_hashes (input_bfd)[symndx]; - sym = syms + symndx; - } - - /* COFF treats common symbols in one of two ways. Either the - size of the symbol is included in the section contents, or it - is not. We assume that the size is not included, and force - the rtype_to_howto function to adjust the addend as needed. */ - if (sym != NULL && sym->n_scnum != 0) - addend = - sym->n_value; - else - addend = 0; - - howto = bfd_coff_rtype_to_howto (input_bfd, input_section, rel, h, - sym, &addend); - if (howto == NULL) - return FALSE; - - /* If we are doing a relocatable link, then we can just ignore - a PC relative reloc that is pcrel_offset. It will already - have the correct value. If this is not a relocatable link, - then we should ignore the symbol value. */ - if (howto->pc_relative && howto->pcrel_offset) - { - if (info->relocatable) - continue; - if (sym != NULL && sym->n_scnum != 0) - addend += sym->n_value; - } - - val = 0; - - if (h == NULL) - { - asection *sec; - - if (symndx == -1) - { - sec = bfd_abs_section_ptr; - val = 0; - } - else - { - sec = sections[symndx]; - val = (sec->output_section->vma - + sec->output_offset - + sym->n_value); - if (! obj_pe (input_bfd)) - val -= sec->vma; - } - } - else - { - if (h->root.type == bfd_link_hash_defined - || h->root.type == bfd_link_hash_defweak) - { - /* Defined weak symbols are a GNU extension. */ - asection *sec; - - sec = h->root.u.def.section; - val = (h->root.u.def.value - + sec->output_section->vma - + sec->output_offset); - } - - else if (h->root.type == bfd_link_hash_undefweak) - { - if (h->symbol_class == C_NT_WEAK && h->numaux == 1) - { - /* See _Microsoft Portable Executable and Common Object - File Format Specification_, section 5.5.3. - Note that weak symbols without aux records are a GNU - extension. - FIXME: All weak externals are treated as having - characteristic IMAGE_WEAK_EXTERN_SEARCH_NOLIBRARY (1). - These behave as per SVR4 ABI: A library member - will resolve a weak external only if a normal - external causes the library member to be linked. - See also linker.c: generic_link_check_archive_element. */ - asection *sec; - struct coff_link_hash_entry *h2 = - h->auxbfd->tdata.coff_obj_data->sym_hashes[ - h->aux->x_sym.x_tagndx.l]; - - if (!h2 || h2->root.type == bfd_link_hash_undefined) - { - sec = bfd_abs_section_ptr; - val = 0; - } - else - { - sec = h2->root.u.def.section; - val = h2->root.u.def.value - + sec->output_section->vma + sec->output_offset; - } - } - else - /* This is a GNU extension. */ - val = 0; - } - - else if (! info->relocatable) - { - if (! ((*info->callbacks->undefined_symbol) - (info, h->root.root.string, input_bfd, input_section, - rel->r_vaddr - input_section->vma, TRUE))) - return FALSE; - } - } - - if (info->base_file) - { - /* Emit a reloc if the backend thinks it needs it. */ - if (sym && pe_data (output_bfd)->in_reloc_p (output_bfd, howto)) - { - /* Relocation to a symbol in a section which isn't - absolute. We output the address here to a file. - This file is then read by dlltool when generating the - reloc section. Note that the base file is not - portable between systems. We write out a bfd_vma here, - and dlltool reads in a bfd_vma. */ - bfd_vma addr = (rel->r_vaddr - - input_section->vma - + input_section->output_offset - + input_section->output_section->vma); - if (coff_data (output_bfd)->pe) - addr -= pe_data(output_bfd)->pe_opthdr.ImageBase; - if (fwrite (&addr, 1, sizeof (bfd_vma), (FILE *) info->base_file) - != sizeof (bfd_vma)) - { - bfd_set_error (bfd_error_system_call); - return FALSE; - } - } - } - - rstat = _bfd_final_link_relocate (howto, input_bfd, input_section, - contents, - rel->r_vaddr - input_section->vma, - val, addend); - - switch (rstat) - { - default: - abort (); - case bfd_reloc_ok: - break; - case bfd_reloc_outofrange: - (*_bfd_error_handler) - (_("%B: bad reloc address 0x%lx in section `%A'"), - input_bfd, input_section, (unsigned long) rel->r_vaddr); - return FALSE; - case bfd_reloc_overflow: - { - const char *name; - char buf[SYMNMLEN + 1]; - - if (symndx == -1) - name = "*ABS*"; - else if (h != NULL) - name = NULL; - else - { - name = _bfd_coff_internal_syment_name (input_bfd, sym, buf); - if (name == NULL) - return FALSE; - } - - if (! ((*info->callbacks->reloc_overflow) - (info, (h ? &h->root : NULL), name, howto->name, - (bfd_vma) 0, input_bfd, input_section, - rel->r_vaddr - input_section->vma))) - return FALSE; - } - } - } - return TRUE; -} |