X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=bfd%2Fcofflink.c;h=e99c470cf482db5504f965f64ccd9b9e6e641e99;hb=dc810e3900d47ab2eea86d50231ff2e70b596847;hp=ea99908644e9e3d814d9bad2b47da7b2a4cdcbab;hpb=ae115e5114deb0326333c80f7af9e689b2e7d01f;p=deliverable%2Fbinutils-gdb.git diff --git a/bfd/cofflink.c b/bfd/cofflink.c index ea99908644..e99c470cf4 100644 --- a/bfd/cofflink.c +++ b/bfd/cofflink.c @@ -1,5 +1,6 @@ /* COFF specific linker code. - Copyright 1994, 1995 Free Software Foundation, Inc. + Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001 + Free Software Foundation, Inc. Written by Ian Lance Taylor, Cygnus Support. This file is part of BFD, the Binary File Descriptor library. @@ -27,83 +28,42 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "coff/internal.h" #include "libcoff.h" -#define STRING_SIZE_SIZE (4) - -/* Information we keep for each section in the output file when doing - a relocateable link. */ - -struct coff_link_section_info -{ - /* The relocs to be output. */ - struct internal_reloc *relocs; - /* For each reloc against a global symbol whose index was not known - when the reloc was handled, the global hash table entry. */ - struct coff_link_hash_entry **rel_hashes; -}; - -/* Information that we pass around while doing the final link step. */ - -struct coff_final_link_info -{ - /* General link information. */ - struct bfd_link_info *info; - /* Output BFD. */ - bfd *output_bfd; - /* Used to indicate failure in traversal routine. */ - boolean failed; - /* Hash table for long symbol name. */ - struct bfd_strtab_hash *strtab; - /* When doing a relocateable link, an array of information kept for - each output section, indexed by the target_index field. */ - struct coff_link_section_info *section_info; - /* Symbol index of last C_FILE symbol (-1 if none). */ - long last_file_index; - /* Contents of last C_FILE symbol. */ - struct internal_syment last_file; - /* Buffer large enough to hold swapped symbols of any input file. */ - struct internal_syment *internal_syms; - /* Buffer large enough to hold sections of symbols of any input file. */ - asection **sec_ptrs; - /* Buffer large enough to hold output indices of symbols of any - input file. */ - long *sym_indices; - /* Buffer large enough to hold output symbols for any input file. */ - bfd_byte *outsyms; - /* Buffer large enough to hold external line numbers for any input - section. */ - bfd_byte *linenos; - /* Buffer large enough to hold any input section. */ - bfd_byte *contents; - /* Buffer large enough to hold external relocs of any input section. */ - bfd_byte *external_relocs; - /* Buffer large enough to hold swapped relocs of any input section. */ - struct internal_reloc *internal_relocs; - -}; - -static struct bfd_hash_entry *coff_link_hash_newfunc - PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); static boolean coff_link_add_object_symbols PARAMS ((bfd *, struct bfd_link_info *)); static boolean coff_link_check_archive_element PARAMS ((bfd *, struct bfd_link_info *, boolean *)); -static INLINE const char *_bfd_coff_internal_syment_name - PARAMS ((bfd *, const struct internal_syment *, char *)); static boolean coff_link_check_ar_symbols PARAMS ((bfd *, struct bfd_link_info *, boolean *)); static boolean coff_link_add_symbols PARAMS ((bfd *, struct bfd_link_info *)); -static boolean coff_link_input_bfd - PARAMS ((struct coff_final_link_info *, bfd *)); -static boolean coff_write_global_sym - PARAMS ((struct coff_link_hash_entry *, PTR)); -static boolean coff_reloc_link_order - PARAMS ((bfd *, struct coff_final_link_info *, asection *, - struct bfd_link_order *)); +static char *dores_com PARAMS ((char *, bfd *, int)); +static char *get_name PARAMS ((char *, char **)); +static int process_embedded_commands + PARAMS ((bfd *, struct bfd_link_info *, bfd *)); +static void mark_relocs PARAMS ((struct coff_final_link_info *, bfd *)); + +/* 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. */ -static struct bfd_hash_entry * -coff_link_hash_newfunc (entry, table, string) +struct bfd_hash_entry * +_bfd_coff_link_hash_newfunc (entry, table, string) struct bfd_hash_entry *entry; struct bfd_hash_table *table; const char *string; @@ -116,10 +76,7 @@ coff_link_hash_newfunc (entry, table, string) ret = ((struct coff_link_hash_entry *) bfd_hash_allocate (table, sizeof (struct coff_link_hash_entry))); if (ret == (struct coff_link_hash_entry *) NULL) - { - bfd_set_error (bfd_error_no_memory); - return (struct bfd_hash_entry *) ret; - } + return (struct bfd_hash_entry *) ret; /* Call the allocation method of the superclass. */ ret = ((struct coff_link_hash_entry *) @@ -139,6 +96,20 @@ coff_link_hash_newfunc (entry, table, string) return (struct bfd_hash_entry *) ret; } +/* Initialize a COFF linker hash table. */ + +boolean +_bfd_coff_link_hash_table_init (table, abfd, newfunc) + struct coff_link_hash_table *table; + bfd *abfd; + struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *, + struct bfd_hash_table *, + const char *)); +{ + table->stab_info = NULL; + return _bfd_link_hash_table_init (&table->root, abfd, newfunc); +} + /* Create a COFF linker hash table. */ struct bfd_link_hash_table * @@ -146,23 +117,52 @@ _bfd_coff_link_hash_table_create (abfd) 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_alloc (abfd, sizeof (struct coff_link_hash_table))); + ret = (struct coff_link_hash_table *) bfd_alloc (abfd, amt); if (ret == NULL) + return NULL; + if (! _bfd_coff_link_hash_table_init (ret, abfd, + _bfd_coff_link_hash_newfunc)) { - bfd_set_error (bfd_error_no_memory); - return NULL; - } - if (! _bfd_link_hash_table_init (&ret->root, abfd, - coff_link_hash_newfunc)) - { - free (ret); + bfd_release (abfd, 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 (entry, table, string) + 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. */ @@ -195,6 +195,7 @@ coff_link_add_object_symbols (abfd, info) return false; if (! coff_link_add_symbols (abfd, info)) return false; + if (! info->keep_memory) { if (! _bfd_coff_free_symbols (abfd)) @@ -235,40 +236,6 @@ coff_link_check_archive_element (abfd, info, pneeded) return true; } -/* Get the name of a symbol. The caller must pass in a buffer of size - >= SYMNMLEN + 1. */ - -static INLINE const char * -_bfd_coff_internal_syment_name (abfd, sym, buf) - bfd *abfd; - const struct internal_syment *sym; - char *buf; -{ - /* FIXME: It's not clear this will work correctly if sizeof - (_n_zeroes) != 4. */ - if (sym->_n._n_n._n_zeroes != 0 - || sym->_n._n_n._n_offset == 0) - { - memcpy (buf, sym->_n._n_name, SYMNMLEN); - buf[SYMNMLEN] = '\0'; - return buf; - } - else - { - const char *strings; - - BFD_ASSERT (sym->_n._n_n._n_offset >= STRING_SIZE_SIZE); - strings = obj_coff_strings (abfd); - if (strings == NULL) - { - strings = _bfd_coff_read_string_table (abfd); - if (strings == NULL) - return NULL; - } - return strings + sym->_n._n_n._n_offset; - } -} - /* Look through the symbols to see if this object file should be included in the link. */ @@ -278,27 +245,25 @@ coff_link_check_ar_symbols (abfd, info, pneeded) struct bfd_link_info *info; boolean *pneeded; { - boolean (*sym_is_global) PARAMS ((bfd *, struct internal_syment *)); bfd_size_type symesz; bfd_byte *esym; bfd_byte *esym_end; *pneeded = false; - sym_is_global = coff_backend_info (abfd)->_bfd_coff_sym_is_global; - 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, (PTR) esym, (PTR) &sym); - if ((sym.n_sclass == C_EXT - || (sym_is_global && (*sym_is_global) (abfd, &sym))) - && (sym.n_scnum != 0 || sym.n_value != 0)) + classification = bfd_coff_classify_symbol (abfd, &sym); + if (classification == COFF_SYMBOL_GLOBAL + || classification == COFF_SYMBOL_COMMON) { const char *name; char buf[SYMNMLEN + 1]; @@ -312,6 +277,16 @@ coff_link_check_ar_symbols (abfd, info, pneeded) return false; h = bfd_link_hash_lookup (info->hash, name, false, false, true); + /* auto import */ + if (!h && info->pei386_auto_import) + { + if (!strncmp (name,"__imp_", 6)) + { + 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 @@ -340,15 +315,22 @@ coff_link_add_symbols (abfd, info) bfd *abfd; struct bfd_link_info *info; { - boolean (*sym_is_global) PARAMS ((bfd *, struct internal_syment *)); + 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; + boolean keep_syms; 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; - sym_is_global = coff_backend_info (abfd)->_bfd_coff_sym_is_global; + /* 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; @@ -359,15 +341,10 @@ coff_link_add_symbols (abfd, info) /* We keep a list of the linker hash table entries that correspond to particular symbols. */ - sym_hash = ((struct coff_link_hash_entry **) - bfd_alloc (abfd, - ((size_t) symcount - * sizeof (struct coff_link_hash_entry *)))); + amt = symcount * sizeof (struct coff_link_hash_entry *); + sym_hash = (struct coff_link_hash_entry **) bfd_alloc (abfd, amt); if (sym_hash == NULL && symcount != 0) - { - bfd_set_error (bfd_error_no_memory); - return false; - } + goto error_return; obj_coff_sym_hashes (abfd) = sym_hash; memset (sym_hash, 0, (size_t) symcount * sizeof (struct coff_link_hash_entry *)); @@ -379,24 +356,26 @@ coff_link_add_symbols (abfd, info) while (esym < esym_end) { struct internal_syment sym; + enum coff_symbol_classification classification; boolean copy; bfd_coff_swap_sym_in (abfd, (PTR) esym, (PTR) &sym); - if (sym.n_sclass == C_EXT - || (sym_is_global && (*sym_is_global) (abfd, &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; + boolean addit; /* This symbol is externally visible. */ name = _bfd_coff_internal_syment_name (abfd, &sym, buf); if (name == NULL) - return false; + goto error_return; /* We must copy the name into memory if we got it from the syment itself, rather than the string table. */ @@ -407,44 +386,165 @@ coff_link_add_symbols (abfd, info) value = sym.n_value; - if (sym.n_scnum == 0) + switch (classification) { - if (value == 0) - { - flags = 0; - section = bfd_und_section_ptr; - } - else + 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) { - flags = BSF_GLOBAL; - section = bfd_com_section_ptr; + 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; } } - else + + /* The Microsoft Visual C compiler does string pooling by + hashing the constants to an internal symbol name, and + relying on the 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) + && section->comdat != NULL + && strncmp (name, "??_", 3) == 0 + && strcmp (name, section->comdat->name) == 0) { - flags = BSF_EXPORT | BSF_GLOBAL; - section = coff_section_from_bfd_index (abfd, sym.n_scnum); - value -= section->vma; + 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 + && (*sym_hash)->root.u.def.section->comdat != NULL + && strcmp ((*sym_hash)->root.u.def.section->comdat->name, + section->comdat->name) == 0) + addit = false; } - if (! (_bfd_generic_link_add_one_symbol - (info, abfd, name, flags, section, value, - (const char *) NULL, copy, false, - (struct bfd_link_hash_entry **) sym_hash))) - return 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 (info->hash->creator->flavour == bfd_get_flavour (abfd)) { - if (((*sym_hash)->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)->class = sym.n_sclass; - (*sym_hash)->type = sym.n_type; - (*sym_hash)->numaux = sym.n_numaux; - (*sym_hash)->auxbfd = 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)->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)->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 %s"), + name, (*sym_hash)->type, sym.n_type, + bfd_get_filename (abfd)); + + /* 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; @@ -452,35 +552,97 @@ coff_link_add_symbols (abfd, info) 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) - { - bfd_set_error (bfd_error_no_memory); - return false; - } + 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, (PTR) eaux, sym.n_type, - sym.n_sclass, i, sym.n_numaux, - (PTR) iaux); + sym.n_sclass, (int) i, + sym.n_numaux, (PTR) 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->_raw_size == 0) + section->_raw_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; } - return true; -} + /* If this is a non-traditional, non-relocateable link, try to + optimize the handling of any .stab/.stabstr sections. */ + if (! info->relocateable + && ! info->traditional_format + && info->hash->creator->flavour == bfd_get_flavour (abfd) + && (info->strip != strip_all && info->strip != strip_debugger)) + { + asection *stab, *stabstr; + stab = bfd_get_section_by_name (abfd, ".stab"); + if (stab != NULL) + { + stabstr = bfd_get_section_by_name (abfd, ".stabstr"); + + if (stabstr != NULL) + { + struct coff_link_hash_table *table; + struct coff_section_tdata *secdata; + secdata = coff_section_data (abfd, stab); + if (secdata == NULL) + { + amt = sizeof (struct coff_section_tdata); + stab->used_by_bfd = (PTR) 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)) + 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. */ boolean @@ -490,13 +652,15 @@ _bfd_coff_final_link (abfd, info) { bfd_size_type symesz; struct coff_final_link_info finfo; + boolean debug_merge_allocated; + boolean long_section_names; asection *o; struct bfd_link_order *p; - size_t max_contents_size; - size_t max_sym_count; - size_t max_lineno_count; - size_t max_reloc_count; - size_t max_output_reloc_count; + 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; @@ -504,6 +668,7 @@ _bfd_coff_final_link (abfd, info) bfd *sub; bfd_byte *external_relocs = NULL; char strbuf[STRING_SIZE_SIZE]; + bfd_size_type amt; symesz = bfd_coff_symesz (abfd); @@ -512,6 +677,7 @@ _bfd_coff_final_link (abfd, info) finfo.strtab = NULL; finfo.section_info = NULL; finfo.last_file_index = -1; + finfo.last_bf_index = -1; finfo.internal_syms = NULL; finfo.sec_ptrs = NULL; finfo.sym_indices = NULL; @@ -520,6 +686,8 @@ _bfd_coff_final_link (abfd, info) finfo.contents = NULL; finfo.external_relocs = NULL; finfo.internal_relocs = NULL; + finfo.global_to_static = false; + debug_merge_allocated = false; coff_data (abfd)->link_info = info; @@ -527,9 +695,16 @@ _bfd_coff_final_link (abfd, info) if (finfo.strtab == NULL) goto error_return; + if (! coff_debug_merge_hash_table_init (&finfo.debug_merge)) + goto error_return; + debug_merge_allocated = true; + /* Compute the file positions for all the sections. */ if (! abfd->output_has_begun) - bfd_coff_compute_section_file_positions (abfd); + { + 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. */ @@ -538,6 +713,8 @@ _bfd_coff_final_link (abfd, info) 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; @@ -550,6 +727,12 @@ _bfd_coff_final_link (abfd, info) 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; @@ -577,6 +760,20 @@ _bfd_coff_final_link (abfd, info) o->rel_filepos = rel_filepos; rel_filepos += o->reloc_count * 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 (finfo.strtab, o->name, false, false) + == (bfd_size_type) -1) + goto error_return; + long_section_names = true; + } } /* If doing a relocateable link, allocate space for the pointers we @@ -587,14 +784,11 @@ _bfd_coff_final_link (abfd, info) /* We use section_count + 1, rather than section_count, because the target_index fields are 1 based. */ - finfo.section_info = ((struct coff_link_section_info *) - malloc ((abfd->section_count + 1) - * sizeof (struct coff_link_section_info))); + amt = abfd->section_count + 1; + amt *= sizeof (struct coff_link_section_info); + finfo.section_info = (struct coff_link_section_info *) bfd_malloc (amt); if (finfo.section_info == NULL) - { - bfd_set_error (bfd_error_no_memory); - goto error_return; - } + goto error_return; for (i = 0; i <= abfd->section_count; i++) { finfo.section_info[i].relocs = NULL; @@ -633,19 +827,17 @@ _bfd_coff_final_link (abfd, info) but only when doing a relocateable link, which is not the common case. */ BFD_ASSERT (info->relocateable); + amt = o->reloc_count; + amt *= sizeof (struct internal_reloc); finfo.section_info[o->target_index].relocs = - ((struct internal_reloc *) - malloc (o->reloc_count * sizeof (struct internal_reloc))); + (struct internal_reloc *) bfd_malloc (amt); + amt = o->reloc_count; + amt *= sizeof (struct coff_link_hash_entry *); finfo.section_info[o->target_index].rel_hashes = - ((struct coff_link_hash_entry **) - malloc (o->reloc_count - * sizeof (struct coff_link_hash_entry *))); + (struct coff_link_hash_entry **) bfd_malloc (amt); if (finfo.section_info[o->target_index].relocs == NULL || finfo.section_info[o->target_index].rel_hashes == NULL) - { - bfd_set_error (bfd_error_no_memory); - goto error_return; - } + goto error_return; if (o->reloc_count > max_output_reloc_count) max_output_reloc_count = o->reloc_count; @@ -674,21 +866,23 @@ _bfd_coff_final_link (abfd, info) } /* Allocate some buffers used while linking. */ - finfo.internal_syms = ((struct internal_syment *) - malloc (max_sym_count - * sizeof (struct internal_syment))); - finfo.sec_ptrs = (asection **) malloc (max_sym_count * sizeof (asection *)); - finfo.sym_indices = (long *) malloc (max_sym_count * sizeof (long)); - finfo.outsyms = ((bfd_byte *) - malloc ((size_t) ((max_sym_count + 1) * symesz))); - finfo.linenos = (bfd_byte *) malloc (max_lineno_count - * bfd_coff_linesz (abfd)); - finfo.contents = (bfd_byte *) malloc (max_contents_size); - finfo.external_relocs = (bfd_byte *) malloc (max_reloc_count * relsz); + amt = max_sym_count * sizeof (struct internal_syment); + finfo.internal_syms = (struct internal_syment *) bfd_malloc (amt); + amt = max_sym_count * sizeof (asection *); + finfo.sec_ptrs = (asection **) bfd_malloc (amt); + amt = max_sym_count * sizeof (long); + finfo.sym_indices = (long *) bfd_malloc (amt); + finfo.outsyms = (bfd_byte *) bfd_malloc ((max_sym_count + 1) * symesz); + amt = max_lineno_count * bfd_coff_linesz (abfd); + finfo.linenos = (bfd_byte *) bfd_malloc (amt); + finfo.contents = (bfd_byte *) bfd_malloc (max_contents_size); + amt = max_reloc_count * relsz; + finfo.external_relocs = (bfd_byte *) bfd_malloc (amt); if (! info->relocateable) - finfo.internal_relocs = ((struct internal_reloc *) - malloc (max_reloc_count - * sizeof (struct internal_reloc))); + { + amt = max_reloc_count * sizeof (struct internal_reloc); + finfo.internal_relocs = (struct internal_reloc *) bfd_malloc (amt); + } if ((finfo.internal_syms == NULL && max_sym_count > 0) || (finfo.sec_ptrs == NULL && max_sym_count > 0) || (finfo.sym_indices == NULL && max_sym_count > 0) @@ -699,10 +893,7 @@ _bfd_coff_final_link (abfd, info) || (! info->relocateable && finfo.internal_relocs == NULL && max_reloc_count > 0)) - { - bfd_set_error (bfd_error_no_memory); - goto error_return; - } + 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 @@ -710,18 +901,24 @@ _bfd_coff_final_link (abfd, info) 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->link_order_head; p != NULL; p = p->next) { if (p->type == bfd_indirect_link_order - && (bfd_get_flavour (p->u.indirect.section->owner) - == bfd_target_coff_flavour)) + && bfd_family_coff (p->u.indirect.section->owner)) { sub = p->u.indirect.section->owner; - if (! sub->output_has_begun) + if (! bfd_coff_link_output_has_begun (sub, & finfo)) { - if (! coff_link_input_bfd (&finfo, sub)) + if (! _bfd_coff_link_input_bfd (&finfo, sub)) goto error_return; sub->output_has_begun = true; } @@ -729,7 +926,7 @@ _bfd_coff_final_link (abfd, info) else if (p->type == bfd_section_reloc_link_order || p->type == bfd_symbol_reloc_link_order) { - if (! coff_reloc_link_order (abfd, &finfo, o, p)) + if (! _bfd_coff_reloc_link_order (abfd, &finfo, o, p)) goto error_return; } else @@ -740,7 +937,14 @@ _bfd_coff_final_link (abfd, info) } } - /* Free up the buffers used by coff_link_input_bfd. */ + if (! bfd_coff_final_link_postscript (abfd, & finfo)) + goto error_return; + + /* Free up the buffers used by _bfd_coff_link_input_bfd. */ + + coff_debug_merge_hash_table_free (&finfo.debug_merge); + debug_merge_allocated = false; + if (finfo.internal_syms != NULL) { free (finfo.internal_syms); @@ -783,42 +987,53 @@ _bfd_coff_final_link (abfd, info) if (finfo.last_file_index != -1 && (unsigned int) finfo.last_file.n_value != obj_raw_syment_count (abfd)) { + file_ptr pos; + finfo.last_file.n_value = obj_raw_syment_count (abfd); bfd_coff_swap_sym_out (abfd, (PTR) &finfo.last_file, (PTR) finfo.outsyms); - if (bfd_seek (abfd, - (obj_sym_filepos (abfd) - + finfo.last_file_index * symesz), - SEEK_SET) != 0 - || bfd_write (finfo.outsyms, symesz, 1, abfd) != symesz) + + pos = obj_sym_filepos (abfd) + finfo.last_file_index * symesz; + if (bfd_seek (abfd, pos, SEEK_SET) != 0 + || bfd_bwrite (finfo.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) + { + finfo.failed = false; + coff_link_hash_traverse (coff_hash_table (info), _bfd_coff_write_task_globals, + (PTR) &finfo); + if (finfo.failed) + goto error_return; + } + /* Write out the global symbols. */ finfo.failed = false; - coff_link_hash_traverse (coff_hash_table (info), coff_write_global_sym, + coff_link_hash_traverse (coff_hash_table (info), _bfd_coff_write_global_sym, (PTR) &finfo); if (finfo.failed) goto error_return; - /* The outsyms buffer is used by coff_write_global_sym. */ + /* The outsyms buffer is used by _bfd_coff_write_global_sym. */ if (finfo.outsyms != NULL) { free (finfo.outsyms); finfo.outsyms = NULL; } - if (info->relocateable) + if (info->relocateable && 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. */ - external_relocs = (bfd_byte *) malloc (max_output_reloc_count * relsz); + amt = max_output_reloc_count * relsz; + external_relocs = (bfd_byte *) bfd_malloc (amt); if (external_relocs == NULL) - { - bfd_set_error (bfd_error_no_memory); - goto error_return; - } + goto error_return; for (o = abfd->sections; o != NULL; o = o->next) { @@ -845,8 +1060,9 @@ _bfd_coff_final_link (abfd, info) } if (bfd_seek (abfd, o->rel_filepos, SEEK_SET) != 0 - || bfd_write ((PTR) external_relocs, relsz, o->reloc_count, - abfd) != relsz * o->reloc_count) + || (bfd_bwrite ((PTR) external_relocs, + (bfd_size_type) relsz * o->reloc_count, abfd) + != (bfd_size_type) relsz * o->reloc_count)) goto error_return; } @@ -870,26 +1086,39 @@ _bfd_coff_final_link (abfd, info) finfo.section_info = NULL; } + /* If we have optimized stabs strings, output them. */ + if (coff_hash_table (info)->stab_info != NULL) + { + if (! _bfd_write_stab_strings (abfd, &coff_hash_table (info)->stab_info)) + return false; + } + /* Write out the string table. */ - if (bfd_seek (abfd, - (obj_sym_filepos (abfd) - + obj_raw_syment_count (abfd) * symesz), - SEEK_SET) != 0) - return false; + 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 - bfd_h_put_32 (abfd, + H_PUT_32 (abfd, _bfd_stringtab_size (finfo.strtab) + STRING_SIZE_SIZE, - (bfd_byte *) strbuf); + strbuf); #else - #error Change bfd_h_put_32 + #error Change H_PUT_32 above #endif - if (bfd_write (strbuf, 1, STRING_SIZE_SIZE, abfd) != STRING_SIZE_SIZE) - return false; + if (bfd_bwrite (strbuf, (bfd_size_type) STRING_SIZE_SIZE, abfd) + != STRING_SIZE_SIZE) + return false; - if (! _bfd_stringtab_emit (abfd, finfo.strtab)) - return false; + if (! _bfd_stringtab_emit (abfd, finfo.strtab)) + return false; + + obj_coff_strings_written (abfd) = true; + } _bfd_stringtab_free (finfo.strtab); @@ -900,6 +1129,8 @@ _bfd_coff_final_link (abfd, info) return true; error_return: + if (debug_merge_allocated) + coff_debug_merge_hash_table_free (&finfo.debug_merge); if (finfo.strtab != NULL) _bfd_stringtab_free (finfo.strtab); if (finfo.section_info != NULL) @@ -936,114 +1167,6 @@ _bfd_coff_final_link (abfd, info) return false; } -/* Read in and swap the relocs. This returns a buffer holding the - relocs for section SEC in file ABFD. If CACHE is true and - INTERNAL_RELOCS is NULL, the relocs read in wil be saved in case - the function is called again. If EXTERNAL_RELOCS is not NULL, it - is a buffer large enough to hold the unswapped relocs. If - INTERNAL_RELOCS is not NULL, it is a buffer large enough to hold - the swapped relocs. If REQUIRE_INTERNAL is true, then the return - value must be INTERNAL_RELOCS. The function returns NULL on error. */ - -struct internal_reloc * -_bfd_coff_read_internal_relocs (abfd, sec, cache, external_relocs, - require_internal, internal_relocs) - bfd *abfd; - asection *sec; - boolean cache; - bfd_byte *external_relocs; - boolean require_internal; - struct internal_reloc *internal_relocs; -{ - bfd_size_type relsz; - bfd_byte *free_external = NULL; - struct internal_reloc *free_internal = NULL; - bfd_byte *erel; - bfd_byte *erel_end; - struct internal_reloc *irel; - - if (coff_section_data (abfd, sec) != NULL - && coff_section_data (abfd, sec)->relocs != NULL) - { - if (! require_internal) - return coff_section_data (abfd, sec)->relocs; - memcpy (internal_relocs, coff_section_data (abfd, sec)->relocs, - sec->reloc_count * sizeof (struct internal_reloc)); - return internal_relocs; - } - - relsz = bfd_coff_relsz (abfd); - - if (external_relocs == NULL) - { - free_external = (bfd_byte *) malloc (sec->reloc_count * relsz); - if (free_external == NULL && sec->reloc_count > 0) - { - bfd_set_error (bfd_error_no_memory); - goto error_return; - } - external_relocs = free_external; - } - - if (bfd_seek (abfd, sec->rel_filepos, SEEK_SET) != 0 - || (bfd_read (external_relocs, relsz, sec->reloc_count, abfd) - != relsz * sec->reloc_count)) - goto error_return; - - if (internal_relocs == NULL) - { - free_internal = ((struct internal_reloc *) - malloc (sec->reloc_count - * sizeof (struct internal_reloc))); - if (free_internal == NULL && sec->reloc_count > 0) - { - bfd_set_error (bfd_error_no_memory); - goto error_return; - } - internal_relocs = free_internal; - } - - /* Swap in the relocs. */ - erel = external_relocs; - erel_end = erel + relsz * sec->reloc_count; - irel = internal_relocs; - for (; erel < erel_end; erel += relsz, irel++) - bfd_coff_swap_reloc_in (abfd, (PTR) erel, (PTR) irel); - - if (free_external != NULL) - { - free (free_external); - free_external = NULL; - } - - if (cache && free_internal != NULL) - { - if (coff_section_data (abfd, sec) == NULL) - { - sec->used_by_bfd = ((PTR) bfd_zalloc (abfd, - sizeof (struct coff_section_tdata))); - if (sec->used_by_bfd == NULL) - { - bfd_set_error (bfd_error_no_memory); - goto error_return; - } - coff_section_data (abfd, sec)->contents = NULL; - } - coff_section_data (abfd, sec)->relocs = free_internal; - } - - return internal_relocs; - - error_return: - if (free_external != NULL) - free (free_external); - if (free_internal != NULL) - free (free_internal); - return NULL; -} - - - /* parse out a -heap , line */ static char * @@ -1052,21 +1175,21 @@ dores_com (ptr, output_bfd, heap) bfd *output_bfd; int heap; { - if (coff_data(output_bfd)->pe) + if (coff_data(output_bfd)->pe) { int val = strtoul (ptr, &ptr, 0); if (heap) - pe_data(output_bfd)->pe_opthdr.SizeOfHeapReserve =val; + pe_data(output_bfd)->pe_opthdr.SizeOfHeapReserve = val; else - pe_data(output_bfd)->pe_opthdr.SizeOfStackReserve =val; + pe_data(output_bfd)->pe_opthdr.SizeOfStackReserve = val; - if (ptr[0] == ',') + if (ptr[0] == ',') { - int val = strtoul (ptr+1, &ptr, 0); + val = strtoul (ptr+1, &ptr, 0); if (heap) - pe_data(output_bfd)->pe_opthdr.SizeOfHeapCommit =val; + pe_data(output_bfd)->pe_opthdr.SizeOfHeapCommit = val; else - pe_data(output_bfd)->pe_opthdr.SizeOfStackCommit =val; + pe_data(output_bfd)->pe_opthdr.SizeOfStackCommit = val; } } return ptr; @@ -1084,34 +1207,32 @@ char **dst; *ptr = 0; return ptr+1; } + /* Process any magic embedded commands in a section called .drectve */ - -int + +static int process_embedded_commands (output_bfd, info, abfd) bfd *output_bfd; - struct bfd_link_info *info; + struct bfd_link_info *info ATTRIBUTE_UNUSED; bfd *abfd; { asection *sec = bfd_get_section_by_name (abfd, ".drectve"); char *s; char *e; char *copy; - if (!sec) + if (!sec) return 1; - - copy = malloc ((size_t) sec->_raw_size); - if (!copy) - { - bfd_set_error (bfd_error_no_memory); - return 0; - } - if (! bfd_get_section_contents(abfd, sec, copy, 0, sec->_raw_size)) + + copy = bfd_malloc (sec->_raw_size); + if (!copy) + return 0; + if (! bfd_get_section_contents(abfd, sec, copy, (bfd_vma) 0, sec->_raw_size)) { free (copy); return 0; } e = copy + sec->_raw_size; - for (s = copy; s < e ; ) + for (s = copy; s < e ; ) { if (s[0]!= '-') { s++; @@ -1132,7 +1253,7 @@ process_embedded_commands (output_bfd, info, abfd) s = get_name(s, &name); s = get_name(s, &attribs); while (loop) { - switch (*attribs++) + switch (*attribs++) { case 'W': had_write = 1; @@ -1166,30 +1287,85 @@ process_embedded_commands (output_bfd, info, abfd) { s = dores_com (s+6, output_bfd, 0); } - else + 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 (finfo, input_bfd) + struct coff_final_link_info * finfo; + 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) + continue; + + /* Read in the relocs. */ + internal_relocs = _bfd_coff_read_internal_relocs + (input_bfd, a, false, + finfo->external_relocs, + finfo->info->relocateable, + (finfo->info->relocateable + ? (finfo->section_info[ a->output_section->target_index ].relocs + a->output_section->reloc_count) + : finfo->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 pass */ + + for (; irel < irelend; irel++) + { + finfo->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. */ -static boolean -coff_link_input_bfd (finfo, input_bfd) +boolean +_bfd_coff_link_input_bfd (finfo, input_bfd) struct coff_final_link_info *finfo; bfd *input_bfd; { - boolean (*sym_is_global) PARAMS ((bfd *, struct internal_syment *)); + unsigned int n_tmask = coff_data (input_bfd)->local_n_tmask; + unsigned int n_btshft = coff_data (input_bfd)->local_n_btshft; +#if 0 + unsigned int n_btmask = coff_data (input_bfd)->local_n_btmask; +#endif boolean (*adjust_symndx) PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, struct internal_reloc *, boolean *)); bfd *output_bfd; const char *strings; bfd_size_type syment_base; - unsigned int n_tmask; - unsigned int n_btshft; boolean copy, hash; bfd_size_type isymesz; bfd_size_type osymesz; @@ -1207,7 +1383,6 @@ coff_link_input_bfd (finfo, input_bfd) /* Move all the symbols to the output file. */ output_bfd = finfo->output_bfd; - sym_is_global = coff_backend_info (input_bfd)->_bfd_coff_sym_is_global; strings = NULL; syment_base = obj_raw_syment_count (output_bfd); isymesz = bfd_coff_symesz (input_bfd); @@ -1215,13 +1390,6 @@ coff_link_input_bfd (finfo, input_bfd) linesz = bfd_coff_linesz (input_bfd); BFD_ASSERT (linesz == bfd_coff_linesz (output_bfd)); - n_tmask = coff_data (input_bfd)->local_n_tmask; - n_btshft = coff_data (input_bfd)->local_n_btshft; - - /* Define macros so that ISFCN, et. al., macros work correctly. */ -#define N_TMASK n_tmask -#define N_BTSHFT n_btshft - copy = false; if (! finfo->info->keep_memory) copy = true; @@ -1240,17 +1408,32 @@ coff_link_input_bfd (finfo, input_bfd) output_index = syment_base; outsym = finfo->outsyms; - if (coff_data(output_bfd)->pe) - { - if (!process_embedded_commands (output_bfd, finfo->info, input_bfd)) - return false; - } + if (coff_data (output_bfd)->pe) + { + if (! process_embedded_commands (output_bfd, finfo->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 (( finfo->info->strip != strip_none + || finfo->info->discard != discard_none) + && finfo->info->relocateable) + { + /* mark the symbol array as 'not-used' */ + memset (indexp, 0, obj_raw_syment_count (input_bfd) * sizeof * indexp); + + mark_relocs (finfo, input_bfd); + } while (esym < esym_end) { struct internal_syment isym; + enum coff_symbol_classification classification; boolean skip; boolean global; + boolean dont_skip_symbol; int add; bfd_coff_swap_sym_in (input_bfd, (PTR) esym, (PTR) isymp); @@ -1261,16 +1444,33 @@ coff_link_input_bfd (finfo, input_bfd) the symbol. */ isym = *isymp; - if (isym.n_scnum != 0) - *secpp = coff_section_from_bfd_index (input_bfd, isym.n_scnum); - else + classification = bfd_coff_classify_symbol (input_bfd, &isym); + switch (classification) { - if (isym.n_value == 0) - *secpp = bfd_und_section_ptr; - else - *secpp = bfd_com_section_ptr; + 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 ((finfo->info->strip != strip_none + || finfo->info->discard != discard_none) + && finfo->info->relocateable) + dont_skip_symbol = *indexp; + else + dont_skip_symbol = false; + *indexp = -1; skip = false; @@ -1278,36 +1478,75 @@ coff_link_input_bfd (finfo, input_bfd) add = 1 + isym.n_numaux; /* If we are stripping all symbols, we want to skip this one. */ - if (finfo->info->strip == strip_all) + if (finfo->info->strip == strip_all && ! dont_skip_symbol) skip = true; if (! skip) { - if (isym.n_sclass == C_EXT - || (sym_is_global && (*sym_is_global) (input_bfd, &isym))) + 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. - Function symbols, however, are an exception, and are - not moved to the end. */ + Locally defined function symbols, however, are an + exception, and are not moved to the end. */ global = true; if (! ISFCN (isym.n_type)) skip = true; - } - else - { + 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 (finfo->info->discard == discard_all) + if (finfo->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, or which belong to linkonce sections that are going + to be discarded. */ + if (!skip + && isym.n_sclass == C_STAT + && isym.n_type == T_NULL + && isym.n_numaux > 0) + { + if ((*secpp)->output_section == bfd_abs_section_ptr + || (*secpp)->kept_section) + skip = true; + } +#endif + /* If we stripping debugging symbols, and this is a debugging - symbol, then skip it. */ + 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 && finfo->info->strip == strip_debugger - && isym.n_scnum == N_DEBUG) + && ! 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 @@ -1323,16 +1562,184 @@ coff_link_input_bfd (finfo, input_bfd) if (name == NULL) return false; - if ((finfo->info->strip == strip_some - && (bfd_hash_lookup (finfo->info->keep_hash, name, false, + if (! dont_skip_symbol + && ((finfo->info->strip == strip_some + && (bfd_hash_lookup (finfo->info->keep_hash, name, false, false) == NULL)) - || (! global - && finfo->info->discard == discard_l - && strncmp (name, finfo->info->lprefix, - finfo->info->lprefix_len) == 0)) + || (! global + && finfo->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 + && (finfo->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 (&finfo->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->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, (PTR) (esym + isymesz), + isym.n_type, isym.n_sclass, 0, isym.n_numaux, + (PTR) &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, (PTR) esl, (PTR) 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, (PTR) (esl + isymesz), + islp->n_type, islp->n_sclass, 0, + islp->n_numaux, (PTR) &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 = finfo->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, (PTR) 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->class != mt->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, (PTR) mt); + *indexp = mtl->indx; + add = (eslend - esym) / isymesz; + skip = true; + } + } + } + /* We now know whether we are to skip this symbol or not. */ if (! skip) { @@ -1359,29 +1766,76 @@ coff_link_input_bfd (finfo, input_bfd) isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx; } - if (isym.n_scnum > 0) + switch (isym.n_sclass) { - isym.n_scnum = (*secpp)->output_section->target_index; - isym.n_value += ((*secpp)->output_section->vma - + (*secpp)->output_offset - - (*secpp)->vma); - } + 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 (finfo->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. */ - /* 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 (isym.n_sclass == C_FILE) - { if (finfo->last_file_index != -1 - && finfo->last_file.n_value != (long) output_index) + && finfo->last_file.n_value != (bfd_vma) output_index) { - /* We must correct the value of the last C_FILE entry. */ + /* We must correct the value of the last C_FILE + entry. */ finfo->last_file.n_value = output_index; if ((bfd_size_type) finfo->last_file_index >= syment_base) { @@ -1395,26 +1849,32 @@ coff_link_input_bfd (finfo, input_bfd) } 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, (PTR) &finfo->last_file, (PTR) outsym); - if (bfd_seek (output_bfd, - (obj_sym_filepos (output_bfd) - + finfo->last_file_index * osymesz), - SEEK_SET) != 0 - || (bfd_write (outsym, osymesz, 1, output_bfd) - != osymesz)) + pos = obj_sym_filepos (output_bfd); + pos += finfo->last_file_index * osymesz; + if (bfd_seek (output_bfd, pos, SEEK_SET) != 0 + || bfd_bwrite (outsym, osymesz, output_bfd) != osymesz) return false; } } finfo->last_file_index = output_index; finfo->last_file = isym; + break; } + /* If doing task linking, convert normal global function symbols to + static functions. */ + if (finfo->info->task_link && IS_EXTERNAL (input_bfd, isym)) + isym.n_sclass = C_STAT; + /* Output the symbol. */ bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) outsym); @@ -1429,7 +1889,13 @@ coff_link_input_bfd (finfo, input_bfd) indx = ((esym - (bfd_byte *) obj_coff_external_syms (input_bfd)) / isymesz); h = obj_coff_sym_hashes (input_bfd)[indx]; - BFD_ASSERT (h != NULL); + 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; } @@ -1464,7 +1930,8 @@ coff_link_input_bfd (finfo, input_bfd) add = 1 + isymp->n_numaux; - if (*indexp < 0 + if ((*indexp < 0 + || (bfd_size_type) *indexp < syment_base) && (*sym_hash == NULL || (*sym_hash)->auxbfd != input_bfd)) esym += add * isymesz; @@ -1477,7 +1944,12 @@ coff_link_input_bfd (finfo, input_bfd) if (*indexp < 0) { h = *sym_hash; - BFD_ASSERT (h->numaux == isymp->n_numaux); + + /* 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 == isymp->n_numaux); } esym += isymesz; @@ -1534,7 +2006,8 @@ coff_link_input_bfd (finfo, input_bfd) if (ISFCN (isymp->n_type) || ISTAG (isymp->n_sclass) - || isymp->n_sclass == C_BLOCK) + || isymp->n_sclass == C_BLOCK + || isymp->n_sclass == C_FCN) { indx = auxp->x_sym.x_fcnary.x_fcn.x_endndx.l; if (indx > 0 @@ -1544,7 +2017,9 @@ coff_link_input_bfd (finfo, input_bfd) the index of the next symbol we are going to include. I don't know if this is entirely right. */ - while (finfo->sym_indices[indx] < 0 + while ((finfo->sym_indices[indx] < 0 + || ((bfd_size_type) finfo->sym_indices[indx] + < syment_base)) && indx < obj_raw_syment_count (input_bfd)) ++indx; if (indx >= obj_raw_syment_count (input_bfd)) @@ -1566,6 +2041,82 @@ coff_link_input_bfd (finfo, input_bfd) 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 (finfo->last_bf_index != -1) + { + finfo->last_bf.x_sym.x_fcnary.x_fcn.x_endndx.l = + *indexp; + + if ((bfd_size_type) finfo->last_bf_index + >= syment_base) + { + PTR 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 = (PTR) (finfo->outsyms + + ((finfo->last_bf_index + - syment_base) + * osymesz)); + bfd_coff_swap_aux_out (output_bfd, + (PTR) &finfo->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, + (PTR) &finfo->last_bf, + isymp->n_type, + isymp->n_sclass, + 0, isymp->n_numaux, + (PTR) outsym); + pos = obj_sym_filepos (output_bfd); + pos += finfo->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) + finfo->last_bf_index = -1; + else + { + /* The endndx field of this aux entry must + be updated with the symbol number of the + next .bf symbol. */ + finfo->last_bf = *auxp; + finfo->last_bf_index = (((outsym - finfo->outsyms) + / osymesz) + + syment_base); + } + } } if (h == NULL) @@ -1594,6 +2145,10 @@ coff_link_input_bfd (finfo, input_bfd) bfd_vma offset; bfd_byte *eline; bfd_byte *elineend; + bfd_byte *oeline; + 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 @@ -1609,13 +2164,15 @@ coff_link_input_bfd (finfo, input_bfd) continue; if (bfd_seek (input_bfd, o->line_filepos, SEEK_SET) != 0 - || bfd_read (finfo->linenos, linesz, o->lineno_count, + || bfd_bread (finfo->linenos, linesz * o->lineno_count, input_bfd) != linesz * o->lineno_count) return false; offset = o->output_section->vma + o->output_offset - o->vma; eline = finfo->linenos; + oeline = finfo->linenos; elineend = eline + linesz * o->lineno_count; + skipping = false; for (; eline < elineend; eline += linesz) { struct internal_lineno iline; @@ -1635,11 +2192,13 @@ coff_link_input_bfd (finfo, input_bfd) if (indx < 0) { /* These line numbers are attached to a symbol - which we are stripping. We should really - just discard the line numbers, but that would - be a pain because we have already counted - them. */ - indx = 0; + 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 { @@ -1678,23 +2237,29 @@ coff_link_input_bfd (finfo, input_bfd) is.n_type, is.n_sclass, 0, is.n_numaux, auxptr); } + + skipping = false; } iline.l_addr.l_symndx = indx; } - bfd_coff_swap_lineno_out (output_bfd, (PTR) &iline, (PTR) eline); + if (!skipping) + { + bfd_coff_swap_lineno_out (output_bfd, (PTR) &iline, + (PTR) oeline); + oeline += linesz; + } } - if (bfd_seek (output_bfd, - (o->output_section->line_filepos - + o->output_section->lineno_count * linesz), - SEEK_SET) != 0 - || bfd_write (finfo->linenos, linesz, o->lineno_count, - output_bfd) != linesz * o->lineno_count) + pos = o->output_section->line_filepos; + pos += o->output_section->lineno_count * linesz; + amt = oeline - finfo->linenos; + if (bfd_seek (output_bfd, pos, SEEK_SET) != 0 + || bfd_bwrite (finfo->linenos, amt, output_bfd) != amt) return false; - o->output_section->lineno_count += o->lineno_count; + o->output_section->lineno_count += amt / linesz; } } @@ -1715,12 +2280,13 @@ coff_link_input_bfd (finfo, input_bfd) /* Write the modified symbols to the output file. */ if (outsym > finfo->outsyms) { - if (bfd_seek (output_bfd, - obj_sym_filepos (output_bfd) + syment_base * osymesz, - SEEK_SET) != 0 - || (bfd_write (finfo->outsyms, outsym - finfo->outsyms, 1, - output_bfd) - != (bfd_size_type) (outsym - finfo->outsyms))) + file_ptr pos; + bfd_size_type amt; + + pos = obj_sym_filepos (output_bfd) + syment_base * osymesz; + amt = outsym - finfo->outsyms; + if (bfd_seek (output_bfd, pos, SEEK_SET) != 0 + || bfd_bwrite (finfo->outsyms, amt, output_bfd) != amt) return false; BFD_ASSERT ((obj_raw_syment_count (output_bfd) @@ -1735,13 +2301,34 @@ coff_link_input_bfd (finfo, input_bfd) for (o = input_bfd->sections; o != NULL; o = o->next) { bfd_byte *contents; + struct coff_section_tdata *secdata; - if ((o->flags & SEC_HAS_CONTENTS) == 0) - continue; + if (! o->linker_mark) + { + /* This section was omitted from the link. */ + continue; + } - if (coff_section_data (input_bfd, o) != NULL - && coff_section_data (input_bfd, o)->contents != NULL) - contents = coff_section_data (input_bfd, o)->contents; + if ((o->flags & SEC_HAS_CONTENTS) == 0 + || (o->_raw_size == 0 && (o->flags & SEC_RELOC) == 0)) + { + if ((o->flags & SEC_RELOC) != 0 + && o->reloc_count != 0) + { + ((*_bfd_error_handler) + (_("%s: relocs in section `%s', but it has no contents"), + bfd_get_filename (input_bfd), + bfd_get_section_name (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 { if (! bfd_get_section_contents (input_bfd, o, finfo->contents, @@ -1845,9 +2432,10 @@ coff_link_input_bfd (finfo, input_bfd) char buf[SYMNMLEN + 1]; /* This reloc is against a symbol we are - stripping. It would be possible to - handle this case, but I don't think it's - worth it. */ + stripping. This should have been handled + by the 'dont_skip_symbol' code in the while + loop at the top of this function. */ + is = finfo->internal_syms + irel->r_symndx; name = (_bfd_coff_internal_syment_name @@ -1868,12 +2456,22 @@ coff_link_input_bfd (finfo, input_bfd) } /* Write out the modified section contents. */ - if (! bfd_set_section_contents (output_bfd, o->output_section, - contents, o->output_offset, - (o->_cooked_size != 0 - ? o->_cooked_size - : o->_raw_size))) - return false; + if (secdata == NULL || secdata->stab_info == NULL) + { + file_ptr loc = o->output_offset * bfd_octets_per_byte (output_bfd); + bfd_size_type amt = (o->_cooked_size != 0 + ? o->_cooked_size : o->_raw_size); + if (! bfd_set_section_contents (output_bfd, o->output_section, + contents, loc, amt)) + return false; + } + else + { + if (! (_bfd_write_section_stabs + (output_bfd, &coff_hash_table (finfo->info)->stab_info, + o, &secdata->stab_info, contents))) + return false; + } } if (! finfo->info->keep_memory) @@ -1887,8 +2485,8 @@ coff_link_input_bfd (finfo, input_bfd) /* Write out a global symbol. Called via coff_link_hash_traverse. */ -static boolean -coff_write_global_sym (h, data) +boolean +_bfd_coff_write_global_sym (h, data) struct coff_link_hash_entry *h; PTR data; { @@ -1897,6 +2495,7 @@ coff_write_global_sym (h, data) struct internal_syment isym; bfd_size_type symesz; unsigned int i; + file_ptr pos; output_bfd = finfo->output_bfd; @@ -1935,8 +2534,9 @@ coff_write_global_sym (h, data) else isym.n_scnum = sec->target_index; isym.n_value = (h->root.u.def.value - + sec->vma + h->root.u.def.section->output_offset); + if (! obj_pe (finfo->output_bfd)) + isym.n_value += sec->vma; } break; @@ -1978,17 +2578,36 @@ coff_write_global_sym (h, data) 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 (finfo->global_to_static) + { + if (! IS_EXTERNAL (output_bfd, isym)) + return true; + + isym.n_sclass = C_STAT; + } + + /* When a weak symbol is not overriden by a strong one, + turn it into an external symbol when not building a + shared or relocateable object. */ + if (! finfo->info->shared + && ! finfo->info->relocateable + && IS_WEAK_EXTERNAL (finfo->output_bfd, isym)) + isym.n_sclass = C_EXT; + isym.n_numaux = h->numaux; - + bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) finfo->outsyms); symesz = bfd_coff_symesz (output_bfd); - if (bfd_seek (output_bfd, - (obj_sym_filepos (output_bfd) - + obj_raw_syment_count (output_bfd) * symesz), - SEEK_SET) != 0 - || bfd_write (finfo->outsyms, symesz, 1, output_bfd) != symesz) + 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 (finfo->outsyms, symesz, output_bfd) != symesz) { finfo->failed = true; return false; @@ -1998,14 +2617,67 @@ coff_write_global_sym (h, data) ++obj_raw_syment_count (output_bfd); - /* Write out any associated aux entries. There normally will be - none. If there are any, I have no idea how to modify them. */ + /* 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++) { - bfd_coff_swap_aux_out (output_bfd, (PTR) (h->aux + i), isym.n_type, - isym.n_sclass, i, isym.n_numaux, + 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->_cooked_size != 0 + ? sec->_cooked_size + : sec->_raw_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) + || finfo->info->relocateable)) + (*_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) + || finfo->info->relocateable)) + (*_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, (PTR) auxp, isym.n_type, + isym.n_sclass, (int) i, isym.n_numaux, (PTR) finfo->outsyms); - if (bfd_write (finfo->outsyms, symesz, 1, output_bfd) != symesz) + if (bfd_bwrite (finfo->outsyms, symesz, output_bfd) != symesz) { finfo->failed = true; return false; @@ -2016,10 +2688,41 @@ coff_write_global_sym (h, data) 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. */ + +boolean +_bfd_coff_write_task_globals (h, data) + struct coff_link_hash_entry *h; + PTR data; +{ + struct coff_final_link_info *finfo = (struct coff_final_link_info *) data; + boolean rtnval = true; + boolean save_global_to_static; + + if (h->indx < 0) + { + switch (h->root.type) + { + case bfd_link_hash_defined: + case bfd_link_hash_defweak: + save_global_to_static = finfo->global_to_static; + finfo->global_to_static = true; + rtnval = _bfd_coff_write_global_sym (h, data); + finfo->global_to_static = save_global_to_static; + break; + default: + break; + } + } + return (rtnval); +} + /* Handle a link order which is supposed to generate a reloc. */ -static boolean -coff_reloc_link_order (output_bfd, finfo, output_section, link_order) +boolean +_bfd_coff_reloc_link_order (output_bfd, finfo, output_section, link_order) bfd *output_bfd; struct coff_final_link_info *finfo; asection *output_section; @@ -2042,17 +2745,16 @@ coff_reloc_link_order (output_bfd, finfo, output_section, link_order) bfd_byte *buf; bfd_reloc_status_type rstat; boolean ok; + file_ptr loc; size = bfd_get_reloc_size (howto); buf = (bfd_byte *) bfd_zmalloc (size); if (buf == NULL) - { - bfd_set_error (bfd_error_no_memory); - return false; - } + return false; rstat = _bfd_relocate_contents (howto, output_bfd, - link_order->u.reloc.p->addend, buf); + (bfd_vma) link_order->u.reloc.p->addend,\ + buf); switch (rstat) { case bfd_reloc_ok: @@ -2075,8 +2777,9 @@ coff_reloc_link_order (output_bfd, finfo, output_section, link_order) } break; } + loc = link_order->offset * bfd_octets_per_byte (output_bfd); ok = bfd_set_section_contents (output_bfd, output_section, (PTR) buf, - (file_ptr) link_order->offset, size); + loc, size); free (buf); if (! ok) return false; @@ -2109,9 +2812,10 @@ coff_reloc_link_order (output_bfd, finfo, output_section, link_order) { struct coff_link_hash_entry *h; - h = coff_link_hash_lookup (coff_hash_table (finfo->info), - link_order->u.reloc.p->u.name, - false, false, true); + h = ((struct coff_link_hash_entry *) + bfd_wrapped_link_hash_lookup (output_bfd, finfo->info, + link_order->u.reloc.p->u.name, + false, false, true)); if (h != NULL) { if (h->indx >= 0) @@ -2167,7 +2871,6 @@ _bfd_coff_generic_relocate_section (output_bfd, info, input_bfd, struct internal_reloc *rel; struct internal_reloc *relend; - rel = relocs; relend = rel + input_section->reloc_count; for (; rel < relend; rel++) @@ -2187,8 +2890,16 @@ _bfd_coff_generic_relocate_section (output_bfd, info, input_bfd, h = NULL; sym = NULL; } + else if (symndx < 0 + || (unsigned long) symndx >= obj_raw_syment_count (input_bfd)) + { + (*_bfd_error_handler) + ("%s: illegal symbol index %ld in relocs", + bfd_get_filename (input_bfd), symndx); + return false; + } else - { + { h = obj_coff_sym_hashes (input_bfd)[symndx]; sym = syms + symndx; } @@ -2203,12 +2914,23 @@ _bfd_coff_generic_relocate_section (output_bfd, info, input_bfd, 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 relocateable 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 relocateable link, + then we should ignore the symbol value. */ + if (howto->pc_relative && howto->pcrel_offset) + { + if (info->relocateable) + continue; + if (sym != NULL && sym->n_scnum != 0) + addend += sym->n_value; + } + val = 0; if (h == NULL) @@ -2225,8 +2947,9 @@ _bfd_coff_generic_relocate_section (output_bfd, info, input_bfd, sec = sections[symndx]; val = (sec->output_section->vma + sec->output_offset - + sym->n_value - - sec->vma); + + sym->n_value); + if (! obj_pe (input_bfd)) + val -= sec->vma; } } else @@ -2242,34 +2965,44 @@ _bfd_coff_generic_relocate_section (output_bfd, info, input_bfd, + sec->output_offset); } + else if (h->root.type == bfd_link_hash_undefweak) + val = 0; + else if (! info->relocateable) { if (! ((*info->callbacks->undefined_symbol) (info, h->root.root.string, input_bfd, input_section, - rel->r_vaddr - input_section->vma))) + rel->r_vaddr - input_section->vma, true))) return false; } } if (info->base_file) { - /* So if this is non pcrelative, and is referenced - to a section or a common symbol, then it needs a reloc */ - if (!howto->pc_relative - && sym && (sym->n_scnum || sym->n_value)) + /* 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 */ - bfd_vma addr = rel->r_vaddr - + input_section->output_offset - + input_section->output_section->vma; - if (coff_data(output_bfd)->pe) + /* 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 long here, + and dlltool reads in a long. */ + long 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; - fwrite (&addr, 1,4, (FILE *) info->base_file); + if (fwrite (&addr, 1, sizeof (long), (FILE *) info->base_file) + != sizeof (long)) + { + 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, @@ -2281,6 +3014,13 @@ _bfd_coff_generic_relocate_section (output_bfd, info, input_bfd, abort (); case bfd_reloc_ok: break; + case bfd_reloc_outofrange: + (*_bfd_error_handler) + (_("%s: bad reloc address 0x%lx in section `%s'"), + bfd_get_filename (input_bfd), + (unsigned long) rel->r_vaddr, + bfd_get_section_name (input_bfd, input_section)); + return false; case bfd_reloc_overflow: { const char *name; @@ -2304,6 +3044,5 @@ _bfd_coff_generic_relocate_section (output_bfd, info, input_bfd, } } } - return true; }