X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=ld%2Fldmain.c;h=392d302588ce10a2178756be7c9894e7cf861790;hb=8e0e09f60077b422ae510f191d6f4de5be42b391;hp=f3770c07f69c681f560d792ae6b635c27fdfb967;hpb=3e4c643dc1401a42066b09f94e02eb433e6eeeda;p=deliverable%2Fbinutils-gdb.git diff --git a/ld/ldmain.c b/ld/ldmain.c index f3770c07f6..392d302588 100644 --- a/ld/ldmain.c +++ b/ld/ldmain.c @@ -1,10 +1,12 @@ -/* Copyright (C) 1991 Free Software Foundation, Inc. - +/* Main program of GNU linker. + Copyright (C) 1991, 92, 93, 94 Free Software Foundation, Inc. + Written by Steve Chamberlain steve@cygnus.com + This file is part of GLD, the Gnu Linker. GLD 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 1, or (at your option) +the Free Software Foundation; either version 2, or (at your option) any later version. GLD is distributed in the hope that it will be useful, @@ -16,17 +18,12 @@ You should have received a copy of the GNU General Public License along with GLD; see the file COPYING. If not, write to the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ -/* - * Written by Steve Chamberlain steve@cygnus.com - * - * $Id$ - * - * - */ - -#include "sysdep.h" #include "bfd.h" +#include "sysdep.h" +#include +#include "libiberty.h" +#include "bfdlink.h" #include "config.h" #include "ld.h" @@ -34,830 +31,878 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ #include "ldmisc.h" #include "ldwrite.h" #include "ldgram.h" -#include "ldsym.h" +#include "ldexp.h" #include "ldlang.h" #include "ldemul.h" #include "ldlex.h" #include "ldfile.h" +#include "ldctor.h" + +/* Somewhere above, sys/stat.h got included . . . . */ +#if !defined(S_ISDIR) && defined(S_IFDIR) +#define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR) +#endif + +#include + +static char *get_emulation PARAMS ((int, char **)); +static void set_scripts_dir PARAMS ((void)); -/* IMPORTS */ -extern boolean lang_has_input_file; -extern boolean trace_files; /* EXPORTS */ char *default_target; -char *output_filename = "a.out"; +const char *output_filename = "a.out"; + /* Name this program was invoked by. */ char *program_name; /* The file that we're creating */ bfd *output_bfd = 0; -extern boolean option_v; - -/* The local symbol prefix */ -char lprefix = 'L'; - -/* Count the number of global symbols multiply defined. */ -int multiple_def_count; - - -/* Count the number of symbols defined through common declarations. - This count is referenced in symdef_library, linear_library, and - modified by enter_global_ref. - - It is incremented when a symbol is created as a common, and - decremented when the common declaration is overridden - - Another way of thinking of it is that this is a count of - all ldsym_types with a ->scoms field */ - -unsigned int commons_pending; - -/* Count the number of global symbols referenced and not defined. - common symbols are not included in this count. */ - -unsigned int undefined_global_sym_count; - - - -/* Count the number of warning symbols encountered. */ -int warning_count; - -/* have we had a load script ? */ -extern boolean had_script; +/* Set by -G argument, for MIPS ECOFF target. */ +int g_switch_value = 8; /* Nonzero means print names of input files as processed. */ boolean trace_files; +/* Nonzero means same, but note open failures, too. */ +boolean trace_file_tries; +/* Nonzero means version number was printed, so exit successfully + instead of complaining if no input files are given. */ +boolean version_printed; -/* 1 => write load map. */ -boolean write_map; - - -int unix_relocate; -#ifdef GNU960 -/* Indicates whether output file will be b.out (default) or coff */ -enum target_flavour_enum output_flavor = BFD_BOUT_FORMAT; -#endif - -/* Force the make_executable to be output, even if there are non-fatal - errors */ -boolean force_make_executable; - -/* A count of the total number of local symbols ever seen - by adding - the symbol_count field of each newly read afile.*/ +args_type command_line; -unsigned int total_symbols_seen; +ld_config_type config; -/* A count of the number of read files - the same as the number of elements - in file_chain - */ -unsigned int total_files_seen; +static boolean check_for_scripts_dir PARAMS ((char *dir)); +static boolean add_archive_element PARAMS ((struct bfd_link_info *, bfd *, + const char *)); +static boolean multiple_definition PARAMS ((struct bfd_link_info *, + const char *, + bfd *, asection *, bfd_vma, + bfd *, asection *, bfd_vma)); +static boolean multiple_common PARAMS ((struct bfd_link_info *, + const char *, bfd *, + enum bfd_link_hash_type, bfd_vma, + bfd *, enum bfd_link_hash_type, + bfd_vma)); +static boolean add_to_set PARAMS ((struct bfd_link_info *, + struct bfd_link_hash_entry *, + bfd_reloc_code_real_type, + bfd *, asection *, bfd_vma)); +static boolean constructor_callback PARAMS ((struct bfd_link_info *, + boolean constructor, + const char *name, + bfd *, asection *, bfd_vma)); +static boolean warning_callback PARAMS ((struct bfd_link_info *, + const char *)); +static boolean undefined_symbol PARAMS ((struct bfd_link_info *, + const char *, bfd *, + asection *, bfd_vma)); +static boolean reloc_overflow PARAMS ((struct bfd_link_info *, const char *, + const char *, bfd_vma, + bfd *, asection *, bfd_vma)); +static boolean reloc_dangerous PARAMS ((struct bfd_link_info *, const char *, + bfd *, asection *, bfd_vma)); +static boolean unattached_reloc PARAMS ((struct bfd_link_info *, + const char *, bfd *, asection *, + bfd_vma)); +static boolean notice_ysym PARAMS ((struct bfd_link_info *, const char *, + bfd *, asection *, bfd_vma)); + +static struct bfd_link_callbacks link_callbacks = +{ + add_archive_element, + multiple_definition, + multiple_common, + add_to_set, + constructor_callback, + warning_callback, + undefined_symbol, + reloc_overflow, + reloc_dangerous, + unattached_reloc, + notice_ysym +}; + +struct bfd_link_info link_info; + +static void +remove_output () +{ + if (output_filename) + { + if (output_bfd && output_bfd->iostream) + fclose((FILE *)(output_bfd->iostream)); + if (delete_output_file_on_failure) + unlink (output_filename); + } +} -/* IMPORTS */ -args_type command_line; -ld_config_type config; int main (argc, argv) - char **argv; int argc; + char **argv; { char *emulation; + long start_time = get_run_time (); + program_name = argv[0]; - output_filename = "a.out"; - - bfd_init(); -#ifdef GNU960 - { - int i; - - check_v960( argc, argv ); - emulation = GLD960_EMULATION_NAME; - for ( i = 1; i < argc; i++ ){ - if ( !strcmp(argv[i],"-Fcoff") ){ - emulation = LNK960_EMULATION_NAME; - output_flavor = BFD_COFF_FORMAT; - break; - } - } - } -#else - emulation = (char *) getenv(EMULATION_ENVIRON); -#endif + xmalloc_set_program_name (program_name); - /* Initialize the data about options. */ + bfd_init (); + + xatexit (remove_output); - trace_files = false; - write_map = false; - config.relocateable_output = false; - unix_relocate = 0; + /* Initialize the data about options. */ + trace_files = trace_file_tries = version_printed = false; + config.traditional_format = false; + config.build_constructors = true; + config.dynamic_link = false; command_line.force_common_definition = false; + command_line.interpreter = NULL; + command_line.rpath = NULL; + + link_info.callbacks = &link_callbacks; + link_info.relocateable = false; + link_info.shared = false; + link_info.strip = strip_none; + link_info.discard = discard_none; + link_info.lprefix_len = 1; + link_info.lprefix = "L"; + link_info.keep_memory = true; + link_info.input_bfds = NULL; + link_info.create_object_symbols_section = NULL; + link_info.hash = NULL; + link_info.keep_hash = NULL; + link_info.notice_hash = NULL; + + ldfile_add_arch (""); - ldfile_add_arch(""); - ldfile_add_library_path("./"); config.make_executable = true; force_make_executable = false; - - - /* Initialize the cumulative counts of symbols. */ - undefined_global_sym_count = 0; - warning_count = 0; - multiple_def_count = 0; - commons_pending = 0; - - config.magic_demand_paged = true ; + config.magic_demand_paged = true; + config.text_read_only = true; config.make_executable = true; - if (emulation == (char *)NULL) { - emulation= DEFAULT_EMULATION; - } - - ldemul_choose_mode(emulation); - default_target = ldemul_choose_target(); - lang_init(); - ldemul_before_parse(); - lang_has_input_file = false; - parse_args(argc, argv); - lang_final(); - if (trace_files) { - info("%P: mode %s\n", emulation); - } - if (lang_has_input_file == false) { - info("%P%F: No input files\n"); - } - - ldemul_after_parse(); - lang_process(); - /* Print error messages for any missing symbols, for any warning - symbols, and possibly multiple definitions */ + emulation = get_emulation (argc, argv); + ldemul_choose_mode (emulation); + default_target = ldemul_choose_target (); + lang_init (); + ldemul_before_parse (); + lang_has_input_file = false; + parse_args (argc, argv); - /* Print a map, if requested. */ + if (link_info.relocateable) + { + if (command_line.relax) + einfo ("%P%F: -relax and -r may not be used together\n"); + if (config.dynamic_link) + einfo ("%P%F: -r and -call_shared may not be used together\n"); + if (link_info.strip == strip_all) + einfo ("%P%F: -r and -s may not be used together\n"); + if (link_info.shared) + einfo ("%P%F: -r and -shared may not be used together\n"); + } - if (write_map) { - ldsym_print_symbol_table (); - lang_map(stdout); - } + /* This essentially adds another -L directory so this must be done after + the -L's in argv have been processed. */ + set_scripts_dir (); - if (config.text_read_only) { - /* Look for a text section and mark the readonly attribute in it */ - asection *found = bfd_get_section_by_name(output_bfd, ".text"); - if (found == (asection *)NULL) { - info("%P%F: text marked read only, but no text section present"); + if (had_script == false) + { + /* Read the emulation's appropriate default script. */ + int isfile; + char *s = ldemul_get_script (&isfile); + + if (isfile) + ldfile_open_command_file (s); + else + lex_redirect (s); + parser_input = input_script; + yyparse (); } - found->flags |= SEC_READONLY; - output_bfd->flags |= WP_TEXT; - } - else { - output_bfd->flags |= WP_TEXT; - } - - - if (config.relocateable_output) { - output_bfd->flags &= ~( D_PAGED); - output_bfd->flags |= EXEC_P; - ldwrite(); - bfd_close(output_bfd); - } - else { - output_bfd->flags |= EXEC_P; - ldwrite(); - bfd_close(output_bfd); - if (config.make_executable == false && force_make_executable == false) { - unlink(output_filename); - } - return (!config.make_executable); - } + lang_final (); - return(0); -} /* main() */ + if (lang_has_input_file == false) + { + if (version_printed) + xexit (0); + einfo ("%P%F: no input files\n"); + } + if (trace_files) + { + info_msg ("%P: mode %s\n", emulation); + } -void -Q_read_entry_symbols (desc, entry) - bfd *desc; - struct lang_input_statement_struct *entry; -{ - if (entry->asymbols == (asymbol **)NULL) { - bfd_size_type table_size = get_symtab_upper_bound(desc); - entry->asymbols = (asymbol **)ldmalloc(table_size); - entry->symbol_count = bfd_canonicalize_symtab(desc, entry->asymbols) ; - } -} + ldemul_after_parse (); -/* - * turn this item into a reference - */ -static void -refize(sp, nlist_p) -ldsym_type *sp; -asymbol **nlist_p; -{ - asymbol *sym = *nlist_p; - sym->value = 0; - sym->flags = BSF_UNDEFINED; - sym->section = (asection *)NULL; - sym->udata =(PTR)( sp->srefs_chain); - sp->srefs_chain = nlist_p; -} -/* -This function is called for each name which is seen which has a global -scope. It enters the name into the global symbol table in the correct -symbol on the correct chain. Remember that each ldsym_type has three -chains attatched, one of all definitions of a symbol, one of all -references of a symbol and one of all common definitions of a symbol. - -When the function is over, the supplied is left connected to the bfd -to which is was born, with its udata field pointing to the next member -on the chain in which it has been inserted. - -A certain amount of jigery pokery is necessary since commons come -along and upset things, we only keep one item in the common chain; the -one with the biggest size seen sofar. When another common comes along -it either bumps the previous definition into the ref chain, since it -is bigger, or gets turned into a ref on the spot since the one on the -common chain is already bigger. If a real definition comes along then -the common gets bumped off anyway. - -Whilst all this is going on we keep a count of the number of multiple -definitions seen, undefined global symbols and pending commons. -*/ + if (config.map_filename) + { + if (strcmp (config.map_filename, "-") == 0) + { + config.map_file = stdout; + } + else + { + config.map_file = fopen (config.map_filename, FOPEN_WT); + if (config.map_file == (FILE *) NULL) + { + einfo ("%P%F: cannot open map file %s: %E\n", + config.map_filename); + } + } + } -void -Q_enter_global_ref (nlist_p) - asymbol **nlist_p; + lang_process (); -{ - asymbol *sym = *nlist_p; - CONST char *name = sym->name; - ldsym_type *sp = ldsym_get (name); + /* Print error messages for any missing symbols, for any warning + symbols, and possibly multiple definitions */ - flagword this_symbol_flags = sym->flags; + if (config.text_read_only) + { + /* Look for a text section and mark the readonly attribute in it */ + asection *found = bfd_get_section_by_name (output_bfd, ".text"); - ASSERT(sym->udata == 0); + if (found != (asection *) NULL) + { + found->flags |= SEC_READONLY; + } + } + if (link_info.relocateable) + output_bfd->flags &= ~EXEC_P; + else + output_bfd->flags |= EXEC_P; - if (flag_is_constructor(this_symbol_flags)) { - /* Add this constructor to the list we keep */ - ldlang_add_constructor(sp); - /* Turn any commons into refs */ - if (sp->scoms_chain != (asymbol **)NULL) { - refize(sp, sp->scoms_chain); - sp->scoms_chain = 0; - } + ldwrite (); + /* Even if we're producing relocateable output, some non-fatal errors should + be reported in the exit status. (What non-fatal errors, if any, do we + want to ignore for relocateable output?) */ - } - else { - if (flag_is_common(this_symbol_flags)) { - /* If we have a definition of this symbol already then - this common turns into a reference. Also we only - ever point to the largest common, so if we - have a common, but it's bigger that the new symbol - the turn this into a reference too. */ - if (sp->sdefs_chain) - { - /* This is a common symbol, but we already have a definition - for it, so just link it into the ref chain as if - it were a reference */ - refize(sp, nlist_p); - } - else if (sp->scoms_chain) { - /* If we have a previous common, keep only the biggest */ - if ( (*(sp->scoms_chain))->value > sym->value) { - /* other common is bigger, throw this one away */ - refize(sp, nlist_p); - } - else if (sp->scoms_chain != nlist_p) { - /* other common is smaller, throw that away */ - refize(sp, sp->scoms_chain); - sp->scoms_chain = nlist_p; - } - } - else { - /* This is the first time we've seen a common, so remember it - - if it was undefined before, we know it's defined now. If - the symbol has been marked as really being a constructor, - then treat this as a ref - */ - if (sp->flags & SYM_CONSTRUCTOR) { - /* Turn this into a ref */ - refize(sp, nlist_p); + if (config.make_executable == false && force_make_executable == false) + { + if (trace_files == true) + { + einfo ("%P: link errors found, deleting executable `%s'\n", + output_filename); } - else { - /* treat like a common */ - if (sp->srefs_chain) - undefined_global_sym_count--; - commons_pending++; - sp->scoms_chain = nlist_p; - } - } - } + if (output_bfd->iostream) + fclose ((FILE *) (output_bfd->iostream)); - else if (flag_is_defined(this_symbol_flags)) { - /* This is the definition of a symbol, add to def chain */ - if (sp->sdefs_chain && (*(sp->sdefs_chain))->section != sym->section) { - /* Multiple definition */ - asymbol *sy = *(sp->sdefs_chain); - lang_input_statement_type *stat = (lang_input_statement_type *) sy->the_bfd->usrdata; - lang_input_statement_type *stat1 = (lang_input_statement_type *) sym->the_bfd->usrdata; - asymbol ** stat1_symbols = stat1 ? stat1->asymbols: 0; - asymbol ** stat_symbols = stat ? stat->asymbols:0; - - multiple_def_count++; - info("%C: multiple definition of `%T'\n", - sym->the_bfd, - sym->section, - stat1_symbols, - sym->value, - sym); - - info("%C: first seen here\n", - sy->the_bfd, - sy->section, - stat_symbols, - sy->value); - } - else { - sym->udata =(PTR)( sp->sdefs_chain); - sp->sdefs_chain = nlist_p; - } - /* A definition overrides a common symbol */ - if (sp->scoms_chain) { - refize(sp, sp->scoms_chain); - sp->scoms_chain = 0; - commons_pending--; - } - else if (sp->srefs_chain) { - /* If previously was undefined, then remember as defined */ - undefined_global_sym_count--; - } + unlink (output_filename); + xexit (1); } - else { - if (sp->scoms_chain == (asymbol **)NULL - && sp->srefs_chain == (asymbol **)NULL - && sp->sdefs_chain == (asymbol **)NULL) { - /* And it's the first time we've seen it */ - undefined_global_sym_count++; - - } - - refize(sp, nlist_p); + else + { + if (! bfd_close (output_bfd)) + einfo ("%F%B: final close failed: %E\n", output_bfd); } - } - ASSERT(sp->sdefs_chain == 0 || sp->scoms_chain == 0); - ASSERT(sp->scoms_chain ==0 || (*(sp->scoms_chain))->udata == 0); + if (config.stats) + { + extern char **environ; + char *lim = (char *) sbrk (0); + long run_time = get_run_time () - start_time; + + fprintf (stderr, "%s: total time in link: %ld.%06ld\n", + program_name, run_time / 1000000, run_time % 1000000); + fprintf (stderr, "%s: data size %ld\n", program_name, + (long) (lim - (char *) &environ)); + } + /* Prevent remove_output from doing anything, after a successful link. */ + output_filename = NULL; + xexit (0); + return 0; } -static void -Q_enter_file_symbols (entry) -lang_input_statement_type *entry; -{ - asymbol **q ; - entry->common_section = - bfd_make_section(entry->the_bfd, "COMMON"); - - ldlang_add_file(entry); +/* We need to find any explicitly given emulation in order to initialize the + state that's needed by the lex&yacc argument parser (parse_args). */ +static char * +get_emulation (argc, argv) + int argc; + char **argv; +{ + char *emulation; + int i; - if (trace_files || option_v) { - info("%I\n", entry); - } + emulation = (char *) getenv (EMULATION_ENVIRON); + if (emulation == NULL) + emulation = DEFAULT_EMULATION; - total_symbols_seen += entry->symbol_count; - total_files_seen ++; - for (q = entry->asymbols; *q; q++) + for (i = 1; i < argc; i++) { - asymbol *p = *q; - - if (flag_is_undefined_or_global_or_common_or_constructor(p->flags)) + if (!strncmp (argv[i], "-m", 2)) { - Q_enter_global_ref(q); + if (argv[i][2] == '\0') + { + /* -m EMUL */ + if (i < argc - 1) + { + emulation = argv[i + 1]; + i++; + } + else + { + einfo("%P%F: missing argument to -m\n"); + } + } + else if (strcmp (argv[i], "-mips1") == 0 + || strcmp (argv[i], "-mips2") == 0 + || strcmp (argv[i], "-mips3") == 0) + { + /* FIXME: The arguments -mips1, -mips2 and -mips3 are + passed to the linker by some MIPS compilers. They + generally tell the linker to use a slightly different + library path. Perhaps someday these should be + implemented as emulations; until then, we just ignore + the arguments and hope that nobody ever creates + emulations named ips1, ips2 or ips3. */ + } + else if (strcmp (argv[i], "-m486") == 0) + { + /* FIXME: The argument -m486 is passed to the linker on + some Linux systems. Hope that nobody creates an + emulation named 486. */ + } + else + { + /* -mEMUL */ + emulation = &argv[i][2]; + } } - if (p->flags & BSF_INDIRECT) { - add_indirect(q); - } - - if (p->flags & BSF_WARNING) { - add_warning(p); - } - ASSERT(p->flags != 0); } -} + return emulation; +} +/* If directory DIR contains an "ldscripts" subdirectory, + add DIR to the library search path and return true, + else return false. */ -/* Searching libraries */ +static boolean +check_for_scripts_dir (dir) + char *dir; +{ + size_t dirlen; + char *buf; + struct stat s; + boolean res; + + dirlen = strlen (dir); + /* sizeof counts the terminating NUL. */ + buf = (char *) xmalloc (dirlen + sizeof("/ldscripts")); + sprintf (buf, "%s/ldscripts", dir); + + res = stat (buf, &s) == 0 && S_ISDIR (s.st_mode); + free (buf); + if (res) + ldfile_add_library_path (dir, false); + return res; +} -struct lang_input_statement_struct *decode_library_subfile (); -void linear_library (), symdef_library (); +/* Set the default directory for finding script files. + Libraries will be searched for here too, but that's ok. + We look for the "ldscripts" directory in: -/* Search the library ENTRY, already open on descriptor DESC. - This means deciding which library members to load, - making a chain of `struct lang_input_statement_struct' for those members, - and entering their global symbols in the hash table. */ + SCRIPTDIR (passed from Makefile) + the dir where this program is (for using it from the build tree) + the dir where this program is/../lib (for installing the tool suite elsewhere) */ -void -search_library (entry) - struct lang_input_statement_struct *entry; +static void +set_scripts_dir () { + char *end, *dir; + size_t dirlen; - /* No need to load a library if no undefined symbols */ - if (!undefined_global_sym_count) return; + if (check_for_scripts_dir (SCRIPTDIR)) + return; /* We've been installed normally. */ - if (bfd_has_map(entry->the_bfd)) - symdef_library (entry); + /* Look for "ldscripts" in the dir where our binary is. */ + end = strrchr (program_name, '/'); + if (end) + { + dirlen = end - program_name; + /* Make a copy of program_name in dir. + Leave room for later "/../lib". */ + dir = (char *) xmalloc (dirlen + 8); + strncpy (dir, program_name, dirlen); + dir[dirlen] = '\0'; + } else - linear_library (entry); + { + dirlen = 1; + dir = (char *) xmalloc (dirlen + 8); + strcpy (dir, "."); + } + + if (check_for_scripts_dir (dir)) + return; /* Don't free dir. */ + /* Look for "ldscripts" in /../lib. */ + strcpy (dir + dirlen, "/../lib"); + if (check_for_scripts_dir (dir)) + return; + + free (dir); /* Well, we tried. */ } +void +add_ysym (name) + const char *name; +{ + if (link_info.notice_hash == (struct bfd_hash_table *) NULL) + { + link_info.notice_hash = ((struct bfd_hash_table *) + xmalloc (sizeof (struct bfd_hash_table))); + if (! bfd_hash_table_init_n (link_info.notice_hash, + bfd_hash_newfunc, + 61)) + einfo ("%P%F: bfd_hash_table_init failed: %E\n"); + } + + if (bfd_hash_lookup (link_info.notice_hash, name, true, true) + == (struct bfd_hash_entry *) NULL) + einfo ("%P%F: bfd_hash_lookup failed: %E\n"); +} -#ifdef GNU960 -static -boolean -gnu960_check_format (abfd, format) -bfd *abfd; -bfd_format format; +/* Handle the -retain-symbols-file option. */ + +void +add_keepsyms_file (filename) + const char *filename; { - boolean retval; + FILE *file; + char *buf; + size_t bufsize; + int c; - if ((bfd_check_format(abfd,format) == true) - && (abfd->xvec->flavour == output_flavor) ){ - return true; - } + if (link_info.strip == strip_some) + einfo ("%X%P: error: duplicate retain-symbols-file\n"); + + file = fopen (filename, "r"); + if (file == (FILE *) NULL) + { + bfd_set_error (bfd_error_system_call); + einfo ("%X%P: %s: %E", filename); + return; + } + link_info.keep_hash = ((struct bfd_hash_table *) + xmalloc (sizeof (struct bfd_hash_table))); + if (! bfd_hash_table_init (link_info.keep_hash, bfd_hash_newfunc)) + einfo ("%P%F: bfd_hash_table_init failed: %E\n"); - return false; -} -#endif + bufsize = 100; + buf = (char *) xmalloc (bufsize); -void -ldmain_open_file_read_symbol (entry) -struct lang_input_statement_struct *entry; -{ - if (entry->asymbols == (asymbol **)NULL - &&entry->real == true - && entry->filename != (char *)NULL) + c = getc (file); + while (c != EOF) { - ldfile_open_file (entry); + while (isspace (c)) + c = getc (file); -#ifdef GNU960 - if (gnu960_check_format(entry->the_bfd, bfd_object)) -#else - if (bfd_check_format(entry->the_bfd, bfd_object)) -#endif + if (c != EOF) { - entry->the_bfd->usrdata = (PTR)entry; + size_t len = 0; + while (! isspace (c) && c != EOF) + { + buf[len] = c; + ++len; + if (len >= bufsize) + { + bufsize *= 2; + buf = xrealloc (buf, bufsize); + } + c = getc (file); + } - Q_read_entry_symbols (entry->the_bfd, entry); - Q_enter_file_symbols (entry); - } -#ifdef GNU960 - else if (gnu960_check_format(entry->the_bfd, bfd_archive)) -#else - else if (bfd_check_format(entry->the_bfd, bfd_archive)) -#endif - { - entry->the_bfd->usrdata = (PTR)entry; + buf[len] = '\0'; - entry->subfiles = (lang_input_statement_type *)NULL; - search_library (entry); - } - else - { - info("%F%B: malformed input file (not rel or archive) \n", - entry->the_bfd); + if (bfd_hash_lookup (link_info.keep_hash, buf, true, true) + == (struct bfd_hash_entry *) NULL) + einfo ("%P%F: bfd_hash_lookup for insertion failed: %E"); } } -} - + if (link_info.strip != strip_none) + einfo ("%P: `-retain-symbols-file' overrides `-s' and `-S'\n"); -/* Construct and return a lang_input_statement_struct for a library member. - The library's lang_input_statement_struct is library_entry, - and the library is open on DESC. - SUBFILE_OFFSET is the byte index in the library of this member's header. - We store the length of the member into *LENGTH_LOC. */ - -lang_input_statement_type * -decode_library_subfile (library_entry, subfile_offset) - struct lang_input_statement_struct *library_entry; - bfd *subfile_offset; + link_info.strip = strip_some; +} + +/* Callbacks from the BFD linker routines. */ + +/* This is called when BFD has decided to include an archive member in + a link. */ + +/*ARGSUSED*/ +static boolean +add_archive_element (info, abfd, name) + struct bfd_link_info *info; + bfd *abfd; + const char *name; { - register struct lang_input_statement_struct *subentry; - subentry = (struct lang_input_statement_struct *) ldmalloc ((bfd_size_type)(sizeof (struct lang_input_statement_struct))); - subentry->filename = subfile_offset -> filename; - subentry->local_sym_name = subfile_offset->filename; - subentry->asymbols = 0; - subentry->the_bfd = subfile_offset; - subentry->subfiles = 0; - subentry->next = 0; - subentry->superfile = library_entry; - subentry->is_archive = false; - - subentry->just_syms_flag = false; - subentry->loaded = false; - subentry->chain = 0; - - return subentry; + lang_input_statement_type *input; + + input = ((lang_input_statement_type *) + xmalloc ((bfd_size_type) sizeof (lang_input_statement_type))); + input->filename = abfd->filename; + input->local_sym_name = abfd->filename; + input->the_bfd = abfd; + input->asymbols = NULL; + input->next = NULL; + input->just_syms_flag = false; + input->loaded = false; + input->search_dirs_flag = false; + + /* FIXME: The following fields are not set: header.next, + header.type, closed, passive_position, symbol_count, + next_real_file, is_archive, target, real, common_section, + common_output_section, complained. This bit of code is from the + old decode_library_subfile function. I don't know whether any of + those fields matters. */ + + ldlang_add_file (input); + + if (config.map_file != (FILE *) NULL) + minfo ("%s needed due to %T\n", abfd->filename, name); + + if (trace_files || trace_file_tries) + info_msg ("%I\n", input); + + return true; } -boolean subfile_wanted_p (); -void -clear_syms(entry, offset) -struct lang_input_statement_struct *entry; -file_ptr offset; +/* This is called when BFD has discovered a symbol which is defined + multiple times. */ + +/*ARGSUSED*/ +static boolean +multiple_definition (info, name, obfd, osec, oval, nbfd, nsec, nval) + struct bfd_link_info *info; + const char *name; + bfd *obfd; + asection *osec; + bfd_vma oval; + bfd *nbfd; + asection *nsec; + bfd_vma nval; { - carsym *car; - unsigned long indx = bfd_get_next_mapent(entry->the_bfd, - BFD_NO_MORE_SYMBOLS, - &car); - while (indx != BFD_NO_MORE_SYMBOLS) { - if (car->file_offset == offset) { - car->name = 0; - } - indx = bfd_get_next_mapent(entry->the_bfd, indx, &car); - } - + einfo ("%X%C: multiple definition of `%T'\n", + nbfd, nsec, nval, name); + if (obfd != (bfd *) NULL) + einfo ("%D: first defined here\n", obfd, osec, oval); + return true; } -/* Search a library that has a map - */ -void -symdef_library (entry) - struct lang_input_statement_struct *entry; - +/* This is called when there is a definition of a common symbol, or + when a common symbol is found for a symbol that is already defined, + or when two common symbols are found. We only do something if + -warn-common was used. */ + +/*ARGSUSED*/ +static boolean +multiple_common (info, name, obfd, otype, osize, nbfd, ntype, nsize) + struct bfd_link_info *info; + const char *name; + bfd *obfd; + enum bfd_link_hash_type otype; + bfd_vma osize; + bfd *nbfd; + enum bfd_link_hash_type ntype; + bfd_vma nsize; { - register struct lang_input_statement_struct *prev = 0; - - boolean not_finished = true; - - - while (not_finished == true) - { - carsym *exported_library_name; - bfd *prev_archive_member_bfd = 0; - - int idx = bfd_get_next_mapent(entry->the_bfd, - BFD_NO_MORE_SYMBOLS, - &exported_library_name); - - not_finished = false; + if (! config.warn_common) + return true; - while (idx != BFD_NO_MORE_SYMBOLS && undefined_global_sym_count) - { + if (ntype == bfd_link_hash_defined) + { + ASSERT (otype == bfd_link_hash_common); + einfo ("%B: warning: definition of `%T' overriding common\n", + nbfd, name); + einfo ("%B: warning: common is here\n", obfd); + } + else if (otype == bfd_link_hash_defined) + { + ASSERT (ntype == bfd_link_hash_common); + einfo ("%B: warning: common of `%T' overridden by definition\n", + nbfd, name); + einfo ("%B: warning: defined here\n", obfd); + } + else + { + ASSERT (otype == bfd_link_hash_common && ntype == bfd_link_hash_common); + if (osize > nsize) + { + einfo ("%B: warning: common of `%T' overridden by larger common\n", + nbfd, name); + einfo ("%B: warning: larger common is here\n", obfd); + } + else if (nsize > osize) + { + einfo ("%B: warning: common of `%T' overriding smaller common\n", + nbfd, name); + einfo ("%B: warning: smaller common is here\n", obfd); + } + else + { + einfo ("%B: warning: multiple common of `%T'\n", nbfd, name); + einfo ("%B: warning: previous common is here\n", obfd); + } + } - if (exported_library_name->name) - { + return true; +} - ldsym_type *sp = ldsym_get_soft (exported_library_name->name); +/* This is called when BFD has discovered a set element. H is the + entry in the linker hash table for the set. SECTION and VALUE + represent a value which should be added to the set. */ + +/*ARGSUSED*/ +static boolean +add_to_set (info, h, reloc, abfd, section, value) + struct bfd_link_info *info; + struct bfd_link_hash_entry *h; + bfd_reloc_code_real_type reloc; + bfd *abfd; + asection *section; + bfd_vma value; +{ + if (! config.build_constructors) + return true; - /* If we find a symbol that appears to be needed, think carefully - about the archive member that the symbol is in. */ - /* So - if it exists, and is referenced somewhere and is - undefined or */ - if (sp && sp->srefs_chain && !sp->sdefs_chain) - { - bfd *archive_member_bfd = bfd_get_elt_at_index(entry->the_bfd, idx); - struct lang_input_statement_struct *archive_member_lang_input_statement_struct; + ldctor_add_set_entry (h, reloc, section, value); -#ifdef GNU960 - if (archive_member_bfd && gnu960_check_format(archive_member_bfd, bfd_object)) -#else - if (archive_member_bfd && bfd_check_format(archive_member_bfd, bfd_object)) -#endif - { + if (h->type == bfd_link_hash_new) + { + h->type = bfd_link_hash_undefined; + h->u.undef.abfd = abfd; + /* We don't call bfd_link_add_undef to add this to the list of + undefined symbols because we are going to define it + ourselves. */ + } - /* Don't think carefully about any archive member - more than once in a given pass. */ - if (prev_archive_member_bfd != archive_member_bfd) - { + return true; +} - prev_archive_member_bfd = archive_member_bfd; +/* This is called when BFD has discovered a constructor. This is only + called for some object file formats--those which do not handle + constructors in some more clever fashion. This is similar to + adding an element to a set, but less general. */ + +static boolean +constructor_callback (info, constructor, name, abfd, section, value) + struct bfd_link_info *info; + boolean constructor; + const char *name; + bfd *abfd; + asection *section; + bfd_vma value; +{ + char *set_name; + char *s; + struct bfd_link_hash_entry *h; - /* Read the symbol table of the archive member. */ + if (! config.build_constructors) + return true; - if (archive_member_bfd->usrdata != (PTR)NULL) { + /* Ensure that BFD_RELOC_CTOR exists now, so that we can give a + useful error message. */ + if (bfd_reloc_type_lookup (output_bfd, BFD_RELOC_CTOR) == NULL) + einfo ("%P%F: BFD backend error: BFD_RELOC_CTOR unsupported"); + + set_name = (char *) alloca (1 + sizeof "__CTOR_LIST__"); + s = set_name; + if (bfd_get_symbol_leading_char (abfd) != '\0') + *s++ = bfd_get_symbol_leading_char (abfd); + if (constructor) + strcpy (s, "__CTOR_LIST__"); + else + strcpy (s, "__DTOR_LIST__"); - archive_member_lang_input_statement_struct =(lang_input_statement_type *) archive_member_bfd->usrdata; - } - else { + if (config.map_file != (FILE *) NULL) + fprintf (config.map_file, + "Adding %s to constructor/destructor set %s\n", name, set_name); - archive_member_lang_input_statement_struct = - decode_library_subfile (entry, archive_member_bfd); - archive_member_bfd->usrdata = (PTR) archive_member_lang_input_statement_struct; + h = bfd_link_hash_lookup (info->hash, set_name, true, true, true); + if (h == (struct bfd_link_hash_entry *) NULL) + einfo ("%P%F: bfd_link_hash_lookup failed: %E"); + if (h->type == bfd_link_hash_new) + { + h->type = bfd_link_hash_undefined; + h->u.undef.abfd = abfd; + /* We don't call bfd_link_add_undef to add this to the list of + undefined symbols because we are going to define it + ourselves. */ + } - } + ldctor_add_set_entry (h, BFD_RELOC_CTOR, section, value); + return true; +} - if (archive_member_lang_input_statement_struct == 0) { - info ("%F%I contains invalid archive member %s\n", - entry, - sp->name); - } +/* This is called when there is a reference to a warning symbol. */ - if (archive_member_lang_input_statement_struct->loaded == false) - { +/*ARGSUSED*/ +static boolean +warning_callback (info, warning) + struct bfd_link_info *info; + const char *warning; +{ + einfo ("%P: %s\n", warning); + return true; +} - Q_read_entry_symbols (archive_member_bfd, archive_member_lang_input_statement_struct); - /* Now scan the symbol table and decide whether to load. */ +/* This is called when an undefined symbol is found. */ +/*ARGSUSED*/ +static boolean +undefined_symbol (info, name, abfd, section, address) + struct bfd_link_info *info; + const char *name; + bfd *abfd; + asection *section; + bfd_vma address; +{ + static char *error_name; + static unsigned int error_count; - if (subfile_wanted_p (archive_member_lang_input_statement_struct) == true) +#define MAX_ERRORS_IN_A_ROW 5 - { - /* This member is needed; load it. - Since we are loading something on this pass, - we must make another pass through the symdef data. */ + if (config.warn_once) + { + static struct bfd_hash_table *hash; - not_finished = true; + /* Only warn once about a particular undefined symbol. */ - Q_enter_file_symbols (archive_member_lang_input_statement_struct); + if (hash == NULL) + { + hash = ((struct bfd_hash_table *) + xmalloc (sizeof (struct bfd_hash_table))); + if (! bfd_hash_table_init (hash, bfd_hash_newfunc)) + einfo ("%F%P: bfd_hash_table_init failed: %E\n"); + } - if (prev) - prev->chain = archive_member_lang_input_statement_struct; - else - entry->subfiles = archive_member_lang_input_statement_struct; + if (bfd_hash_lookup (hash, name, false, false) != NULL) + return true; + if (bfd_hash_lookup (hash, name, true, true) == NULL) + einfo ("%F%P: bfd_hash_lookup failed: %E\n"); + } - prev = archive_member_lang_input_statement_struct; + /* We never print more than a reasonable number of errors in a row + for a single symbol. */ + if (error_name != (char *) NULL + && strcmp (name, error_name) == 0) + ++error_count; + else + { + error_count = 0; + if (error_name != (char *) NULL) + free (error_name); + error_name = buystring (name); + } + if (error_count < MAX_ERRORS_IN_A_ROW) + einfo ("%X%C: undefined reference to `%T'\n", + abfd, section, address, name); + else if (error_count == MAX_ERRORS_IN_A_ROW) + einfo ("%D: more undefined references to `%T' follow\n", + abfd, section, address, name); - /* Clear out this member's symbols from the symdef data - so that following passes won't waste time on them. */ - clear_syms(entry, exported_library_name->file_offset); - archive_member_lang_input_statement_struct->loaded = true; - } - } - } - } - } - } - idx = bfd_get_next_mapent(entry->the_bfd, idx, &exported_library_name); - } - } + return true; } -void -linear_library (entry) -struct lang_input_statement_struct *entry; +/* This is called when a reloc overflows. */ + +/*ARGSUSED*/ +static boolean +reloc_overflow (info, name, reloc_name, addend, abfd, section, address) + struct bfd_link_info *info; + const char *name; + const char *reloc_name; + bfd_vma addend; + bfd *abfd; + asection *section; + bfd_vma address; { - boolean more_to_do = true; - register struct lang_input_statement_struct *prev = 0; - - while (more_to_do) { - - bfd * archive = bfd_openr_next_archived_file(entry->the_bfd,0); - - more_to_do = false; - while (archive) { -#ifdef GNU960 - if (gnu960_check_format(archive, bfd_object)) -#else - if (bfd_check_format(archive, bfd_object)) -#endif - { - register struct lang_input_statement_struct *subentry; - - subentry = decode_library_subfile (entry, - archive); - - archive->usrdata = (PTR) subentry; - if (!subentry) return; - if (subentry->loaded == false) { - Q_read_entry_symbols (archive, subentry); - - if (subfile_wanted_p (subentry) == true) - { - Q_enter_file_symbols (subentry); - - if (prev) - prev->chain = subentry; - else - entry->subfiles = subentry; - prev = subentry; - - more_to_do = true; - subentry->loaded = true; - } - } - } - archive = bfd_openr_next_archived_file(entry->the_bfd,archive); - - } - - } + if (abfd == (bfd *) NULL) + einfo ("%P%X: generated"); + else + einfo ("%X%C:", abfd, section, address); + einfo (" relocation truncated to fit: %s %T", reloc_name, name); + if (addend != 0) + einfo ("+%v", addend); + einfo ("\n"); + return true; } - /* ENTRY is an entry for a library member. - Its symbols have been read into core, but not entered. - Return nonzero if we ought to load this member. */ +/* This is called when a dangerous relocation is made. */ -boolean -subfile_wanted_p (entry) -struct lang_input_statement_struct *entry; +/*ARGSUSED*/ +static boolean +reloc_dangerous (info, message, abfd, section, address) + struct bfd_link_info *info; + const char *message; + bfd *abfd; + asection *section; + bfd_vma address; { - asymbol **q; - - for (q = entry->asymbols; *q; q++) - { - asymbol *p = *q; - - /* If the symbol has an interesting definition, we could - potentially want it. */ - - if (p->flags & BSF_INDIRECT) { - /* Grab out the name we've indirected to, and keep the insides - */ - add_indirect(q); - } - - if (p->flags & BSF_FORT_COMM - || p->flags & BSF_GLOBAL) - { - register ldsym_type *sp = ldsym_get_soft (p->name); - - - /* If this symbol has not been hashed, - we can't be looking for it. */ - if (sp != (ldsym_type *)NULL - && sp->sdefs_chain == (asymbol **)NULL) { - if (sp->srefs_chain != (asymbol **)NULL - || sp->scoms_chain != (asymbol **)NULL) - { - /* This is a symbol we are looking for. It is either - not yet defined or common. */ - - if (flag_is_common(p->flags)) - { - - /* If the symbol in the table is a constructor, we won't to - anything fancy with it */ - if ((sp->flags & SYM_CONSTRUCTOR) == 0) { - /* This libary member has something to - say about this element. We should - remember if its a new size */ - /* Move something from the ref list to the com list */ - if(sp->scoms_chain) { - /* Already a common symbol, maybe update it */ - if (p->value > (*(sp->scoms_chain))->value) { - (*(sp->scoms_chain))->value = p->value; - } - } - else { - /* Take a value from the ref chain - Here we are moving a symbol from the owning bfd - to another bfd. We must set up the - common_section portion of the bfd thing */ - - - - sp->scoms_chain = sp->srefs_chain; - sp->srefs_chain = - (asymbol **)((*(sp->srefs_chain))->udata); - (*(sp->scoms_chain))->udata = (PTR)NULL; - - (*( sp->scoms_chain))->flags = BSF_FORT_COMM; - /* Remember the size of this item */ - sp->scoms_chain[0]->value = p->value; - commons_pending++; - undefined_global_sym_count--; - } { - asymbol *com = *(sp->scoms_chain); - if (((lang_input_statement_type *) - (com->the_bfd->usrdata))->common_section == - (asection *)NULL) { - ((lang_input_statement_type *) - (com->the_bfd->usrdata))->common_section = - bfd_make_section(com->the_bfd, "COMMON"); - } - } - } - ASSERT(p->udata == 0); - } - - else { - if (write_map) - { - info("%I needed due to %s\n",entry, sp->name); - } - return true; - } - } - } - } - } + if (abfd == (bfd *) NULL) + einfo ("%P%X: generated"); + else + einfo ("%X%C:", abfd, section, address); + einfo ("dangerous relocation: %s\n", message); + return true; +} - return false; +/* This is called when a reloc is being generated attached to a symbol + that is not being output. */ + +/*ARGSUSED*/ +static boolean +unattached_reloc (info, name, abfd, section, address) + struct bfd_link_info *info; + const char *name; + bfd *abfd; + asection *section; + bfd_vma address; +{ + if (abfd == (bfd *) NULL) + einfo ("%P%X: generated"); + else + einfo ("%X%C:", abfd, section, address); + einfo (" reloc refers to symbol `%T' which is not being output\n", name); + return true; } +/* This is called when a symbol in notice_hash is found. Symbols are + put in notice_hash using the -y option. */ + +/*ARGSUSED*/ +static boolean +notice_ysym (info, name, abfd, section, value) + struct bfd_link_info *info; + const char *name; + bfd *abfd; + asection *section; + bfd_vma value; +{ + einfo ("%B: %s %s\n", abfd, + bfd_is_und_section (section) ? "reference to" : "definition of", + name); + return true; +}