diff options
author | obrien <obrien@FreeBSD.org> | 2002-09-17 01:54:56 +0000 |
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committer | obrien <obrien@FreeBSD.org> | 2002-09-17 01:54:56 +0000 |
commit | b58b89fc83e89a880dc747f252347d46a4dd4953 (patch) | |
tree | b6b6d8cb20d6e54de2ab2460a8990997c9ba68c2 /gnu/usr.bin/ld/ld.c | |
parent | a51c9b66271f0551fb83b90a7db6c464eac2318b (diff) | |
download | FreeBSD-src-b58b89fc83e89a880dc747f252347d46a4dd4953.zip FreeBSD-src-b58b89fc83e89a880dc747f252347d46a4dd4953.tar.gz |
BANG! BANG! BANG! Put these bits out of their misery.
Murdered by members of: a.out.die.die.die
ELF is the 1 true path now. So make good on the src/Makefile threat that
building a.out will not be supported post 4.x. These bits should either
resurface as a port, or a new port using the latest Binutils bits. The
later will not support our SunOS-style shared a.out libs; but we shouldn't
need such support by this point in time.
Diffstat (limited to 'gnu/usr.bin/ld/ld.c')
-rw-r--r-- | gnu/usr.bin/ld/ld.c | 3825 |
1 files changed, 0 insertions, 3825 deletions
diff --git a/gnu/usr.bin/ld/ld.c b/gnu/usr.bin/ld/ld.c deleted file mode 100644 index 316df28..0000000 --- a/gnu/usr.bin/ld/ld.c +++ /dev/null @@ -1,3825 +0,0 @@ -/*- - * This code is derived from software copyrighted by the Free Software - * Foundation. - * - * Modified 1991 by Donn Seeley at UUNET Technologies, Inc. - * - * Modified 1993 by Paul Kranenburg, Erasmus University - */ - -#ifndef lint -static char sccsid[] = "@(#)ld.c 6.10 (Berkeley) 5/22/91"; -#endif /* not lint */ - -/* Linker `ld' for GNU - Copyright (C) 1988 Free Software Foundation, Inc. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 1, or (at your option) - any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ - -/* Written by Richard Stallman with some help from Eric Albert. - Set, indirect, and warning symbol features added by Randy Smith. */ - -/* - * $FreeBSD$ - */ - -/* Define how to initialize system-dependent header fields. */ - -#include <sys/param.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <sys/file.h> -#include <sys/time.h> -#include <sys/resource.h> -#include <limits.h> -#include <stdio.h> -#include <stdlib.h> -#include <unistd.h> -#include <err.h> -#include <fcntl.h> -#include <ar.h> -#include <ranlib.h> -#include <a.out.h> -#include <stab.h> -#include <string.h> - -#include "ld.h" -#include "dynamic.h" - -/* Vector of entries for input files specified by arguments. - These are all the input files except for members of specified libraries. */ -struct file_entry *file_table; -int number_of_files; - -/* 1 => write relocation into output file so can re-input it later. */ -int relocatable_output; - -/* 1 => building a shared object, set by `-Bshareable'. */ -int building_shared_object; - -/* 1 => create the output executable. */ -int make_executable; - -/* Force the executable to be output, even if there are non-fatal errors */ -int force_executable; - -/* 1 => assign space to common symbols even if `relocatable_output'. */ -int force_common_definition; - -/* 1 => assign jmp slots to text symbols in shared objects even if non-PIC */ -int force_alias_definition; - -/* 1 => some files contain PIC code, affects relocation bits - if `relocatable_output'. */ -int pic_code_seen; - -/* 1 => segments must be page aligned (ZMAGIC, QMAGIC) */ -int page_align_segments; - -/* 1 => data segment must be page aligned, even if `-n' or `-N' */ -int page_align_data; - -/* 1 => do not use standard library search path */ -int nostdlib; - -/* Version number to put in __DYNAMIC (set by -V) */ -int soversion; - -int text_size; /* total size of text. */ -int text_start; /* start of text */ -int text_pad; /* clear space between text and data */ -int data_size; /* total size of data. */ -int data_start; /* start of data */ -int data_pad; /* part of bss segment as part of data */ - -int bss_size; /* total size of bss. */ -int bss_start; /* start of bss */ - -int text_reloc_size; /* total size of text relocation. */ -int data_reloc_size; /* total size of data relocation. */ - -int rrs_section_type; /* What's in the RRS section */ -int rrs_text_size; /* Size of RRS text additions */ -int rrs_text_start; /* Location of above */ -int rrs_data_size; /* Size of RRS data additions */ -int rrs_data_start; /* Location of above */ - -/* Specifications of start and length of the area reserved at the end - of the data segment for the set vectors. Computed in 'digest_symbols' */ -int set_sect_start; /* start of set element vectors */ -int set_sect_size; /* size of above */ - -int link_mode; /* Current link mode */ -int pic_type; /* PIC type */ - -/* - * When loading the text and data, we can avoid doing a close - * and another open between members of the same library. - * - * These two variables remember the file that is currently open. - * Both are zero if no file is open. - * - * See `each_file' and `file_close'. - */ -struct file_entry *input_file; -int input_desc; - -/* The name of the file to write; "a.out" by default. */ -char *output_filename; /* Output file name. */ -char *real_output_filename; /* Output file name. */ -FILE *outstream; /* Output file descriptor. */ -struct exec outheader; /* Output file header. */ -int magic; /* Output file magic. */ -int oldmagic; -int relocatable_output; /* `-r'-ed output */ - -symbol *entry_symbol; /* specified by `-e' */ -int entry_offset; /* program entry if no `-e' given */ - -int page_size; /* Size of a page (machine dependent) */ - -/* - * Keep a list of any symbols referenced from the command line (so - * that error messages for these guys can be generated). This list is - * zero terminated. - */ -symbol **cmdline_references; -int cl_refs_allocated; - -/* - * Which symbols should be stripped (omitted from the output): none, all, or - * debugger symbols. - */ -enum { - STRIP_NONE, STRIP_ALL, STRIP_DEBUGGER -} strip_symbols; - -/* - * Which local symbols should be omitted: none, all, or those starting with L. - * This is irrelevant if STRIP_NONE. - */ -enum { - DISCARD_NONE, DISCARD_ALL, DISCARD_L -} discard_locals; - -int global_sym_count; /* # of nlist entries for global symbols */ -int size_sym_count; /* # of N_SIZE nlist entries for output - (relocatable_output only) */ -int local_sym_count; /* # of nlist entries for local symbols. */ -int non_L_local_sym_count; /* # of nlist entries for non-L symbols */ -int debugger_sym_count; /* # of nlist entries for debugger info. */ -int undefined_global_sym_count; /* # of global symbols referenced and - not defined. */ -int undefined_shobj_sym_count; /* # of undefined symbols referenced - by shared objects */ -int multiple_def_count; /* # of multiply defined symbols. */ -int defined_global_sym_count; /* # of defined global symbols. */ -int common_defined_global_count; /* # of common symbols. */ -int undefined_weak_sym_count; /* # of weak symbols referenced and - not defined. */ - -#if notused -int special_sym_count; /* # of linker defined symbols. */ - /* XXX - Currently, only __DYNAMIC and _G_O_T_ go here if required, - * perhaps _etext, _edata and _end should go here too. - */ -#endif -int global_alias_count; /* # of aliased symbols */ -int set_symbol_count; /* # of N_SET* symbols. */ -int set_vector_count; /* # of set vectors in output. */ -int warn_sym_count; /* # of warning symbols encountered. */ -int flag_list_files; /* 1 => print pathnames of files, don't link */ -int list_warning_symbols; /* 1 => warning symbols referenced */ - -struct string_list_element *set_element_prefixes; - -int trace_files; /* print names of input files as processed (`-t'). */ -int write_map; /* write a load map (`-M') */ - -/* - * `text-start' address is normally this much plus a page boundary. - * This is not a user option; it is fixed for each system. - */ -int text_start_alignment; - -/* - * Nonzero if -T was specified in the command line. - * This prevents text_start from being set later to default values. - */ -int T_flag_specified; - -/* - * Nonzero if -Tdata was specified in the command line. - * This prevents data_start from being set later to default values. - */ -int Tdata_flag_specified; - -/* - * Size to pad data section up to. - * We simply increase the size of the data section, padding with zeros, - * and reduce the size of the bss section to match. - */ -int specified_data_size; - -long *set_vectors; -int setv_fill_count; - -static void decode_option __P((char *, char *)); -static void decode_command __P((int, char **)); -static int classify_arg __P((char *)); -static void load_symbols __P((void)); -static void enter_global_ref __P((struct localsymbol *, - char *, struct file_entry *)); -static void digest_symbols __P((void)); -static void digest_pass1 __P((void)), digest_pass2 __P((void)); -static void consider_file_section_lengths __P((struct file_entry *)); -static void relocate_file_addresses __P((struct file_entry *)); -static void consider_relocation __P((struct file_entry *, int)); -static void consider_local_symbols __P((struct file_entry *)); -static void perform_relocation __P((char *, int, - struct relocation_info *, int, - struct file_entry *, int)); -static void copy_text __P((struct file_entry *)); -static void copy_data __P((struct file_entry *)); -static void coptxtrel __P((struct file_entry *)); -static void copdatrel __P((struct file_entry *)); -static void write_output __P((void)); -static void write_header __P((void)); -static void write_text __P((void)); -static void write_data __P((void)); -static void write_rel __P((void)); -static void write_syms __P((void)); -static void assign_symbolnums __P((struct file_entry *, int *)); -static void cleanup __P((void)); -static int parse __P((char *, char *, char *)); -static void list_files __P((void)); - - -int -main(argc, argv) - int argc; - char *argv[]; -{ - - /* Added this to stop ld core-dumping on very large .o files. */ -#ifdef RLIMIT_STACK - /* Get rid of any avoidable limit on stack size. */ - { - struct rlimit rlim; - - /* Set the stack limit huge so that alloca does not fail. */ - if (getrlimit(RLIMIT_STACK, &rlim) != 0) - warn("getrlimit"); - else { - rlim.rlim_cur = rlim.rlim_max; - if (setrlimit(RLIMIT_STACK, &rlim) != 0) - warn("setrlimit"); - } - } -#endif /* RLIMIT_STACK */ - - page_size = PAGSIZ; - - /* Clear the cumulative info on the output file. */ - - text_size = 0; - data_size = 0; - bss_size = 0; - text_reloc_size = 0; - data_reloc_size = 0; - - data_pad = 0; - text_pad = 0; - page_align_segments = 0; - page_align_data = 0; - - /* Initialize the data about options. */ - - specified_data_size = 0; - strip_symbols = STRIP_NONE; - trace_files = 0; - discard_locals = DISCARD_NONE; - entry_symbol = 0; - write_map = 0; - relocatable_output = 0; - force_common_definition = 0; - T_flag_specified = 0; - Tdata_flag_specified = 0; - magic = DEFAULT_MAGIC; - make_executable = 1; - force_executable = 0; - link_mode = DYNAMIC; -#ifdef SUNOS4 - link_mode |= SILLYARCHIVE; -#endif - soversion = DEFAULT_SOVERSION; - - /* Initialize the cumulative counts of symbols. */ - - local_sym_count = 0; - non_L_local_sym_count = 0; - debugger_sym_count = 0; - undefined_global_sym_count = 0; - warn_sym_count = 0; - list_warning_symbols = 0; - multiple_def_count = 0; - common_defined_global_count = 0; - - /* Keep a list of symbols referenced from the command line */ - cl_refs_allocated = 10; - cmdline_references = (symbol **) - xmalloc(cl_refs_allocated * sizeof(symbol *)); - *cmdline_references = 0; - - /* Completely decode ARGV. */ - decode_command(argc, argv); - - if (flag_list_files) - list_files(); - - building_shared_object = - (!relocatable_output && (link_mode & SHAREABLE)); - - if (building_shared_object && entry_symbol) { - errx(1,"`-Bshareable' and `-e' options are mutually exclusive"); - } - - /* Create the symbols `etext', `edata' and `end'. */ - symtab_init(relocatable_output); - - /* - * Determine whether to count the header as part of the text size, - * and initialize the text size accordingly. This depends on the kind - * of system and on the output format selected. - */ - - if (magic == ZMAGIC || magic == QMAGIC) - page_align_segments = 1; - - md_init_header(&outheader, magic, 0); - - text_size = sizeof(struct exec); - text_size -= N_TXTOFF(outheader); - - if (text_size < 0) - text_size = 0; - entry_offset = text_size; - - if (!T_flag_specified && !relocatable_output) - text_start = TEXT_START(outheader); - - /* The text-start address is normally this far past a page boundary. */ - text_start_alignment = text_start % page_size; - - /* - * Load symbols of all input files. Also search all libraries and - * decide which library members to load. - */ - load_symbols(); - - /* Compute where each file's sections go, and relocate symbols. */ - digest_symbols(); - - /* - * Print error messages for any missing symbols, for any warning - * symbols, and possibly multiple definitions - */ - make_executable &= do_warnings(stderr); - - /* Print a map, if requested. */ - if (write_map) - print_symbols(stdout); - - /* Write the output file. */ - if (make_executable || force_executable) - write_output(); - - exit(!make_executable); -} - -/* - * Analyze a command line argument. Return 0 if the argument is a filename. - * Return 1 if the argument is a option complete in itself. Return 2 if the - * argument is a option which uses an argument. - * - * Thus, the value is the number of consecutive arguments that are part of - * options. - */ - -static int -classify_arg(arg) - register char *arg; -{ - if (*arg != '-') - return 0; - switch (arg[1]) { - case 'a': - if (!strcmp(&arg[2], "ssert")) - return 2; - case 'A': - case 'D': - case 'e': - case 'L': - case 'l': - case 'O': - case 'o': - case 'R': - case 'u': - case 'V': - case 'y': - if (arg[2]) - return 1; - return 2; - - case 'B': - if (!strcmp(&arg[2], "static")) - return 1; - if (!strcmp(&arg[2], "dynamic")) - return 1; - if (!strcmp(&arg[2], "forcedynamic")) - return 1; - - case 'T': - if (arg[2] == 0) - return 2; - if (!strcmp(&arg[2], "text")) - return 2; - if (!strcmp(&arg[2], "data")) - return 2; - return 1; - } - - return 1; -} - -/* - * Process the command arguments, setting up file_table with an entry for - * each input file, and setting variables according to the options. - */ - -static void -decode_command(argc, argv) - int argc; - char **argv; -{ - register int i; - register struct file_entry *p; - - number_of_files = 0; - output_filename = "a.out"; - - /* - * First compute number_of_files so we know how long to make - * file_table. - * Also process most options completely. - */ - - for (i = 1; i < argc; i++) { - register int code = classify_arg(argv[i]); - if (code) { - if (i + code > argc) - errx(1, "no argument following %s", argv[i]); - - decode_option(argv[i], argv[i + 1]); - - if (argv[i][1] == 'l' || argv[i][1] == 'A') - number_of_files++; - - i += code - 1; - } else - number_of_files++; - } - - if (!number_of_files) { - if (flag_list_files) - exit(0); - errx(1, "No input files specified"); - } - - p = file_table = (struct file_entry *) - xmalloc(number_of_files * sizeof(struct file_entry)); - bzero(p, number_of_files * sizeof(struct file_entry)); - - /* Now scan again and fill in file_table. */ - /* All options except -A and -l are ignored here. */ - - for (i = 1; i < argc; i++) { - char *string; - register int code = classify_arg(argv[i]); - - if (code == 0) { - p->filename = argv[i]; - p->local_sym_name = argv[i]; - p++; - continue; - } - if (code == 2) - string = argv[i + 1]; - else - string = &argv[i][2]; - - if (argv[i][1] == 'B') { - if (strcmp(string, "static") == 0) - link_mode &= ~DYNAMIC; - else if (strcmp(string, "dynamic") == 0) - link_mode |= DYNAMIC; - else if (strcmp(string, "forcedynamic") == 0) - link_mode |= DYNAMIC|FORCEDYNAMIC; - else if (strcmp(string, "symbolic") == 0) - link_mode |= SYMBOLIC; - else if (strcmp(string, "forcearchive") == 0) - link_mode |= FORCEARCHIVE; - else if (strcmp(string, "shareable") == 0) - link_mode |= SHAREABLE; -#ifdef SUN_COMPAT - else if (strcmp(string, "silly") == 0) - link_mode |= SILLYARCHIVE; - else if (strcmp(string, "~silly") == 0) - link_mode &= ~SILLYARCHIVE; -#endif - } - if (!strcmp(argv[i] + 1, "assert")) { - if (!strcmp(string, "pure-text")) - link_mode |= WARNRRSTEXT; - } - if (argv[i][1] == 'A') { - if (p != file_table) - errx(1, "-A specified before an input file other than the first"); - p->filename = string; - p->local_sym_name = string; - p->flags |= E_JUST_SYMS; - link_mode &= ~DYNAMIC; - p++; - } - if (argv[i][1] == 'l') { - p->filename = string; - p->local_sym_name = concat("-l", string, ""); - p->flags |= E_SEARCH_DIRS; - if (link_mode & DYNAMIC && !relocatable_output) - p->flags |= E_SEARCH_DYNAMIC; - p++; - } - i += code - 1; - } - - /* Now check some option settings for consistency. */ - - if (page_align_segments && - (text_start - text_start_alignment) & (page_size - 1)) - errx(1, "incorrect alignment of text start address"); - - /* Append the standard search directories to the user-specified ones. */ - add_search_path(getenv("LD_LIBRARY_PATH")); - if (!nostdlib) - std_search_path(); -} - -void -add_cmdline_ref(sp) - symbol *sp; -{ - symbol **ptr; - - for (ptr = cmdline_references; - ptr < cmdline_references + cl_refs_allocated && *ptr; - ptr++); - - if (ptr >= cmdline_references + cl_refs_allocated - 1) { - int diff = ptr - cmdline_references; - - cl_refs_allocated *= 2; - cmdline_references = (symbol **) - xrealloc(cmdline_references, - cl_refs_allocated * sizeof(symbol *)); - ptr = cmdline_references + diff; - } - *ptr++ = sp; - *ptr = (symbol *)0; -} - -int -set_element_prefixed_p(name) - char *name; -{ - struct string_list_element *p; - int i; - - for (p = set_element_prefixes; p; p = p->next) { - - for (i = 0; p->str[i] != '\0' && (p->str[i] == name[i]); i++); - if (p->str[i] == '\0') - return 1; - } - return 0; -} - -/* - * Record an option and arrange to act on it later. ARG should be the - * following command argument, which may or may not be used by this option. - * - * The `l' and `A' options are ignored here since they actually specify input - * files. - */ - -static void -decode_option(swt, arg) - register char *swt, *arg; -{ - if (!strcmp(swt + 1, "Bstatic")) - return; - if (!strcmp(swt + 1, "Bdynamic")) - return; - if (!strcmp(swt + 1, "Bforcedynamic")) - return; - if (!strcmp(swt + 1, "Bsymbolic")) - return; - if (!strcmp(swt + 1, "Bforcearchive")) - return; - if (!strcmp(swt + 1, "Bshareable")) - return; - if (!strcmp(swt + 1, "assert")) - return; -#ifdef SUN_COMPAT - if (!strcmp(swt + 1, "Bsilly")) - return; -#endif - if (!strcmp(swt + 1, "Ttext")) { - text_start = parse(arg, "%x", "invalid argument to -Ttext"); - T_flag_specified = 1; - return; - } - if (!strcmp(swt + 1, "Tdata")) { - rrs_data_start = parse(arg, "%x", "invalid argument to -Tdata"); - Tdata_flag_specified = 1; - return; - } - if (!strcmp(swt + 1, "noinhibit-exec")) { - force_executable = 1; - return; - } - if (!strcmp(swt + 1, "nostdlib")) { - nostdlib = 1; - return; - } - if (swt[2] != 0) - arg = &swt[2]; - - switch (swt[1]) { - case 'A': - return; - - case 'D': - specified_data_size = parse(arg, "%x", "invalid argument to -D"); - return; - - case 'd': - if (swt[2] == 0 || *arg == 'c') - force_common_definition = 1; - else if (*arg == 'p') - force_alias_definition = 1; - else - errx(1, "-d option takes 'c' or 'p' argument"); - return; - - case 'e': - entry_symbol = getsym(arg); - if (!entry_symbol->defined && - !(entry_symbol->flags & GS_REFERENCED)) - undefined_global_sym_count++; - entry_symbol->flags |= GS_REFERENCED; - add_cmdline_ref(entry_symbol); - return; - - case 'f': - flag_list_files = 1; - return; - - case 'l': - return; - - case 'L': - add_search_dir(arg); - return; - - case 'M': - write_map = 1; - return; - - case 'N': - magic = OMAGIC; - return; - - case 'n': - magic = NMAGIC; - return; - - case 'O': - output_filename = xmalloc(strlen(arg)+5); - strcpy(output_filename, arg); - strcat(output_filename, ".tmp"); - real_output_filename = arg; - return; - - case 'o': - output_filename = arg; - return; - - case 'p': - page_align_data = 1; - return; - -#ifdef QMAGIC - case 'Q': - magic = QMAGIC; - return; -#endif - - case 'r': - relocatable_output = 1; - magic = OMAGIC; - text_start = 0; - return; - - case 'R': - rrs_search_paths = (rrs_search_paths == NULL) - ? strdup(arg) - : concat(rrs_search_paths, ":", arg); - return; - - case 'S': - strip_symbols = STRIP_DEBUGGER; - return; - - case 's': - strip_symbols = STRIP_ALL; - return; - - case 'T': - text_start = parse(arg, "%x", "invalid argument to -T"); - T_flag_specified = 1; - return; - - case 't': - trace_files = 1; - return; - - case 'u': - { - register symbol *sp = getsym(arg); - - if (!sp->defined && !(sp->flags & GS_REFERENCED)) - undefined_global_sym_count++; - sp->flags |= GS_REFERENCED; - add_cmdline_ref(sp); - } - return; - -#if 1 - case 'V': - soversion = parse(arg, "%d", "invalid argument to -V"); - return; -#endif - - case 'X': - discard_locals = DISCARD_L; - return; - - case 'x': - discard_locals = DISCARD_ALL; - return; - - case 'y': - { - register symbol *sp = getsym(&swt[2]); - sp->flags |= GS_TRACE; - } - return; - - case 'z': - magic = ZMAGIC; - oldmagic = 0; -#ifdef __FreeBSD__ - netzmagic = 1; -#endif - return; - - case 'Z': - magic = oldmagic = ZMAGIC; -#ifdef __FreeBSD__ - netzmagic = 0; -#endif - return; - - default: - errx(1, "invalid command option `%s'", swt); - } -} - -/* Convenient functions for operating on one or all files being loaded. */ - -/* - * Call FUNCTION on each input file entry. Do not call for entries for - * libraries; instead, call once for each library member that is being - * loaded. - * - * FUNCTION receives two arguments: the entry, and ARG. - */ - -void -each_file(function, arg) - register void (*function)(); - register void *arg; -{ - register int i; - - for (i = 0; i < number_of_files; i++) { - register struct file_entry *entry = &file_table[i]; - register struct file_entry *subentry; - - if (entry->flags & E_SCRAPPED) - continue; - - if (!(entry->flags & E_IS_LIBRARY)) - (*function)(entry, arg); - - subentry = entry->subfiles; - for (; subentry; subentry = subentry->chain) { - if (subentry->flags & E_SCRAPPED) - continue; - (*function)(subentry, arg); - } - -#ifdef SUN_COMPAT - if (entry->silly_archive) { - - if (!(entry->flags & E_DYNAMIC)) - warnx("Silly"); - - if (!(entry->silly_archive->flags & E_IS_LIBRARY)) - warnx("Sillier"); - - subentry = entry->silly_archive->subfiles; - for (; subentry; subentry = subentry->chain) { - if (subentry->flags & E_SCRAPPED) - continue; - (*function)(subentry, arg); - } - } -#endif - } -} - -/* - * Call FUNCTION on each input file entry until it returns a non-zero value. - * Return this value. Do not call for entries for libraries; instead, call - * once for each library member that is being loaded. - * - * FUNCTION receives two arguments: the entry, and ARG. It must be a function - * returning unsigned long (though this can probably be fudged). - */ - -unsigned long -check_each_file(function, arg) - register unsigned long (*function)(); - register void *arg; -{ - register int i; - register unsigned long return_val; - - for (i = 0; i < number_of_files; i++) { - register struct file_entry *entry = &file_table[i]; - if (entry->flags & E_SCRAPPED) - continue; - if (entry->flags & E_IS_LIBRARY) { - register struct file_entry *subentry = entry->subfiles; - for (; subentry; subentry = subentry->chain) { - if (subentry->flags & E_SCRAPPED) - continue; - if ( (return_val = (*function)(subentry, arg)) ) - return return_val; - } - } else if ( (return_val = (*function)(entry, arg)) ) - return return_val; - } - return 0; -} - -/* Like `each_file' but ignore files that were just for symbol definitions. */ - -void -each_full_file(function, arg) - register void (*function)(); - register void *arg; -{ - register int i; - - for (i = 0; i < number_of_files; i++) { - register struct file_entry *entry = &file_table[i]; - register struct file_entry *subentry; - - if (entry->flags & (E_SCRAPPED | E_JUST_SYMS)) - continue; - -#ifdef SUN_COMPAT - if (entry->silly_archive) { - - if (!(entry->flags & E_DYNAMIC)) - warnx("Silly"); - - if (!(entry->silly_archive->flags & E_IS_LIBRARY)) - warnx("Sillier"); - - subentry = entry->silly_archive->subfiles; - for (; subentry; subentry = subentry->chain) { - if (subentry->flags & E_SCRAPPED) - continue; - (*function)(subentry, arg); - } - } -#endif - if (entry->flags & E_DYNAMIC) - continue; - - if (!(entry->flags & E_IS_LIBRARY)) - (*function)(entry, arg); - - subentry = entry->subfiles; - for (; subentry; subentry = subentry->chain) { - if (subentry->flags & E_SCRAPPED) - continue; - (*function)(subentry, arg); - } - - } -} - -/* Close the input file that is now open. */ - -void -file_close() -{ - close(input_desc); - input_desc = 0; - input_file = 0; -} - -/* - * Open the input file specified by 'entry', and return a descriptor. The - * open file is remembered; if the same file is opened twice in a row, a new - * open is not actually done. - */ -int -file_open(entry) - register struct file_entry *entry; -{ - register int fd; - - if (entry->superfile && (entry->superfile->flags & E_IS_LIBRARY)) - return file_open(entry->superfile); - - if (entry == input_file) - return input_desc; - - if (input_file) - file_close(); - - if (entry->flags & E_SEARCH_DIRS) { - fd = findlib(entry); - } else - fd = open(entry->filename, O_RDONLY, 0); - - if (fd >= 0) { - input_file = entry; - input_desc = fd; - return fd; - } - - if (entry->flags & E_SEARCH_DIRS) - errx(1, "%s: no match", entry->local_sym_name); - else - err(1, "%s", entry->filename); - return fd; -} - -int -text_offset(entry) - struct file_entry *entry; -{ - return entry->starting_offset + N_TXTOFF (entry->header); -} - -/*---------------------------------------------------------------------------*/ - -/* - * Read a file's header into the proper place in the file_entry. FD is the - * descriptor on which the file is open. ENTRY is the file's entry. - */ -void -read_header(fd, entry) - int fd; - struct file_entry *entry; -{ - register int len; - - if (lseek(fd, entry->starting_offset, L_SET) != - entry->starting_offset) - err(1, "%s: read_header: lseek", get_file_name(entry)); - - len = read(fd, &entry->header, sizeof(struct exec)); - if (len != sizeof (struct exec)) - err(1, "%s: read_header: read", get_file_name(entry)); - - md_swapin_exec_hdr(&entry->header); - - if (N_BADMAG (entry->header)) - errx(1, "%s: bad magic", get_file_name(entry)); - - if (N_BADMID(entry->header)) - errx(1, "%s: non-native input file", get_file_name(entry)); - - entry->flags |= E_HEADER_VALID; -} - -/* - * Read the symbols of file ENTRY into core. Assume it is already open, on - * descriptor FD. Also read the length of the string table, which follows - * the symbol table, but don't read the contents of the string table. - */ - -void -read_entry_symbols(fd, entry) - struct file_entry *entry; - int fd; -{ - int str_size; - struct nlist *np; - int i; - - if (!(entry->flags & E_HEADER_VALID)) - read_header(fd, entry); - - np = (struct nlist *)alloca(entry->header.a_syms); - entry->nsymbols = entry->header.a_syms / sizeof(struct nlist); - if (entry->nsymbols == 0) - return; - - entry->symbols = (struct localsymbol *) - xmalloc(entry->nsymbols * sizeof(struct localsymbol)); - - if (lseek(fd, N_SYMOFF(entry->header) + entry->starting_offset, L_SET) - != N_SYMOFF(entry->header) + entry->starting_offset) - err(1, "%s: read_symbols: lseek(syms)", get_file_name(entry)); - - if (entry->header.a_syms != read(fd, np, entry->header.a_syms)) - errx(1, "%s: read_symbols: premature end of file in symbols", - get_file_name(entry)); - - md_swapin_symbols(np, entry->header.a_syms / sizeof(struct nlist)); - - for (i = 0; i < entry->nsymbols; i++) { - entry->symbols[i].nzlist.nlist = *np++; - entry->symbols[i].nzlist.nz_size = 0; - entry->symbols[i].symbol = NULL; - entry->symbols[i].next = NULL; - entry->symbols[i].entry = entry; - entry->symbols[i].gotslot_offset = -1; - entry->symbols[i].flags = 0; - } - - entry->strings_offset = N_STROFF(entry->header) + - entry->starting_offset; - if (lseek(fd, entry->strings_offset, 0) == (off_t)-1) - err(1, "%s: read_symbols: lseek(strings)", - get_file_name(entry)); - if (sizeof str_size != read(fd, &str_size, sizeof str_size)) - errx(1, "%s: read_symbols: cannot read string table size", - get_file_name(entry)); - - entry->string_size = md_swap_long(str_size); -} - -/* - * Read the string table of file ENTRY open on descriptor FD, into core. - */ -void -read_entry_strings(fd, entry) - struct file_entry *entry; - int fd; -{ - - if (entry->string_size == 0) - return; - - if (!(entry->flags & E_HEADER_VALID) || !entry->strings_offset) - errx(1, "%s: read_strings: string table unavailable", - get_file_name(entry)); - - if (lseek(fd, entry->strings_offset, L_SET) != - entry->strings_offset) - err(1, "%s: read_strings: lseek", - get_file_name(entry)); - - if (read(fd, entry->strings, entry->string_size) != - entry->string_size) - errx(1, "%s: read_strings: premature end of file in strings", - get_file_name(entry)); - - return; -} - -/* Read in the relocation sections of ENTRY if necessary */ - -void -read_entry_relocation(fd, entry) - int fd; - struct file_entry *entry; -{ - register struct relocation_info *reloc; - off_t pos; - - if (!entry->textrel) { - - reloc = (struct relocation_info *) - xmalloc(entry->header.a_trsize); - - pos = text_offset(entry) + - entry->header.a_text + entry->header.a_data; - - if (lseek(fd, pos, L_SET) != pos) - err(1, "%s: read_reloc(text): lseek", - get_file_name(entry)); - - if (read(fd, reloc, entry->header.a_trsize) != - entry->header.a_trsize) - errx(1, "%s: read_reloc(text): premature EOF", - get_file_name(entry)); - - md_swapin_reloc(reloc, entry->header.a_trsize / sizeof(*reloc)); - entry->textrel = reloc; - entry->ntextrel = entry->header.a_trsize / sizeof(*reloc); - - } - - if (!entry->datarel) { - - reloc = (struct relocation_info *) - xmalloc(entry->header.a_drsize); - - pos = text_offset(entry) + entry->header.a_text + - entry->header.a_data + entry->header.a_trsize; - - if (lseek(fd, pos, L_SET) != pos) - err(1, "%s: read_reloc(data): lseek", - get_file_name(entry)); - - if (read(fd, reloc, entry->header.a_drsize) != - entry->header.a_drsize) - errx(1, "%s: read_reloc(data): premature EOF", - get_file_name(entry)); - - md_swapin_reloc(reloc, entry->header.a_drsize / sizeof(*reloc)); - entry->datarel = reloc; - entry->ndatarel = entry->header.a_drsize / sizeof(*reloc); - - } -} - -/*---------------------------------------------------------------------------*/ - -/* - * Read in the symbols of all input files. - */ -static void -load_symbols() -{ - register int i; - - if (trace_files) - fprintf(stderr, "Loading symbols:\n\n"); - - for (i = 0; i < number_of_files; i++) - read_file_symbols(&file_table[i]); - - if (trace_files) - fprintf(stderr, "\n"); -} - -/* - * If ENTRY is a rel file, read its symbol and string sections into core. If - * it is a library, search it and load the appropriate members (which means - * calling this function recursively on those members). - */ - -void -read_file_symbols(entry) - register struct file_entry *entry; -{ - register int fd; - register int len; - struct exec hdr; - - fd = file_open(entry); - - len = read(fd, &hdr, sizeof hdr); - if (len != sizeof hdr) - errx(1, "%s: read_file_symbols(header): premature EOF", - get_file_name(entry)); - - md_swapin_exec_hdr(&hdr); - - if (!N_BADMAG (hdr)) { - if (N_IS_DYNAMIC(hdr) && !(entry->flags & E_JUST_SYMS)) { - if (relocatable_output) { - errx(1, - "%s: -r and shared objects currently not supported", - get_file_name(entry)); - return; - } -#if notyet /* Compatibility */ - if (!(N_GETFLAG(hdr) & EX_PIC)) - warnx("%s: EX_PIC not set", - get_file_name(entry)); -#endif - entry->flags |= E_DYNAMIC; - if (entry->superfile || rrs_add_shobj(entry)) - read_shared_object(fd, entry); - else - entry->flags |= E_SCRAPPED; - } else { - if (N_GETFLAG(hdr) & EX_PIC) - pic_code_seen = 1; - read_entry_symbols(fd, entry); - entry->strings = (char *)alloca(entry->string_size); - read_entry_strings(fd, entry); - read_entry_relocation(fd, entry); - enter_file_symbols(entry); - entry->strings = 0; - } - } else { - char armag[SARMAG]; - - lseek (fd, 0, 0); - if (SARMAG != read(fd, armag, SARMAG) || - strncmp (armag, ARMAG, SARMAG)) - errx(1, - "%s: malformed input file (not rel or archive)", - get_file_name(entry)); - entry->flags |= E_IS_LIBRARY; - search_library(fd, entry); - } - - file_close(); -} - - -/* - * Enter the external symbol defs and refs of ENTRY in the hash table. - */ - -void -enter_file_symbols(entry) - struct file_entry *entry; -{ - struct localsymbol *lsp, *lspend; - - if (trace_files) - prline_file_name(entry, stderr); - - lspend = entry->symbols + entry->nsymbols; - - for (lsp = entry->symbols; lsp < lspend; lsp++) { - register struct nlist *p = &lsp->nzlist.nlist; - - if (p->n_type == (N_SETV | N_EXT)) - continue; - - /* - * Turn magically prefixed symbols into set symbols of - * a corresponding type. - */ - if (set_element_prefixes && - set_element_prefixed_p(entry->strings+lsp->nzlist.nz_strx)) - lsp->nzlist.nz_type += (N_SETA - N_ABS); - - if (SET_ELEMENT_P(p->n_type)) { - set_symbol_count++; - if (!relocatable_output) - enter_global_ref(lsp, - p->n_un.n_strx + entry->strings, entry); - } else if (p->n_type == N_WARNING) { - char *msg = p->n_un.n_strx + entry->strings; - - /* Grab the next entry. */ - lsp++; - p = &lsp->nzlist.nlist; - if (p->n_type != (N_UNDF | N_EXT)) { - warnx( - "%s: Warning symbol without external reference following.", - get_file_name(entry)); - make_executable = 0; - lsp--; /* Process normally. */ - } else { - symbol *sp; - char *name = p->n_un.n_strx + entry->strings; - /* Deal with the warning symbol. */ - lsp->flags |= LS_WARNING; - enter_global_ref(lsp, name, entry); - sp = getsym(name); - if (sp->warning == NULL) { - sp->warning = (char *) - xmalloc(strlen(msg)+1); - strcpy(sp->warning, msg); - warn_sym_count++; - } else if (strcmp(sp->warning, msg)) - warnx( - "%s: multiple definitions for warning symbol `%s'", - get_file_name(entry), demangle(sp->name)); - } - } else if (p->n_type & N_EXT) { - enter_global_ref(lsp, - p->n_un.n_strx + entry->strings, entry); - } else if (p->n_un.n_strx && - (p->n_un.n_strx + entry->strings)[0] == LPREFIX) - lsp->flags |= LS_L_SYMBOL; - } - -} - -/* - * Enter one global symbol in the hash table. LSP points to the `struct - * localsymbol' from the file that describes the global symbol. NAME is the - * symbol's name. ENTRY is the file entry for the file the symbol comes from. - * - * LSP is put on the chain of all such structs that refer to the same symbol. - * This chain starts in the `refs' for symbols from relocatable objects. A - * backpointer to the global symbol is kept in LSP. - * - * Symbols from shared objects are linked through `soref'. For such symbols - * that's all we do at this stage, with the exception of the case where the - * symbol is a common. The `referenced' bit is only set for references from - * relocatable objects. - * - */ - -static void -enter_global_ref(lsp, name, entry) - struct localsymbol *lsp; - char *name; - struct file_entry *entry; -{ - register struct nzlist *nzp = &lsp->nzlist; - register symbol *sp = getsym(name); - register int type = nzp->nz_type; - int oldref = (sp->flags & GS_REFERENCED); - int olddef = sp->defined; - int com = sp->defined && sp->common_size; - - if (type == (N_INDR | N_EXT) && !olddef) { - sp->alias = getsym(entry->strings + (lsp + 1)->nzlist.nz_strx); - if (sp == sp->alias) { - warnx("%s: %s is alias for itself", - get_file_name(entry), name); - /* Rewrite symbol as global text symbol with value 0 */ - lsp->nzlist.nz_type = N_TEXT|N_EXT; - lsp->nzlist.nz_value = 0; - make_executable = 0; - } -#if 0 - if (sp->flags & GS_REFERENCED) - sp->alias->flags |= GS_REFERENCED; -#endif - } - - if (entry->flags & E_DYNAMIC) { - lsp->next = sp->sorefs; - sp->sorefs = lsp; - lsp->symbol = sp; - - /* - * Handle commons from shared objects: - * 1) If symbol hitherto undefined, turn it into a common. - * 2) If symbol already common, update size if necessary. - */ -/*XXX - look at case where commons are only in shared objects */ - if (type == (N_UNDF | N_EXT) && nzp->nz_value) { - if (!olddef) { - if (oldref) - undefined_global_sym_count--; - common_defined_global_count++; - sp->common_size = nzp->nz_value; - sp->defined = N_UNDF | N_EXT; - } else if (com && sp->common_size < nzp->nz_value) { - sp->common_size = nzp->nz_value; - } - } else if (type != (N_UNDF | N_EXT) && !oldref) { - /* - * This is an ex common... - */ - if (com) - common_defined_global_count--; - sp->common_size = 0; - sp->defined = 0; - } - - /* - * Handle size information in shared objects. - */ - if (nzp->nz_size > sp->size) - sp->size = nzp->nz_size; - - if ((lsp->flags & LS_WARNING) && (sp->flags & GS_REFERENCED)) - /* - * Prevent warning symbols from getting - * gratuitously referenced. - */ - list_warning_symbols = 1; - return; - } - - lsp->next = sp->refs; - sp->refs = lsp; - lsp->symbol = sp; - - if (lsp->flags & LS_WARNING) { - /* - * Prevent warning symbols from getting - * gratuitously referenced. - */ - if (sp->flags & GS_REFERENCED) - list_warning_symbols = 1; - return; - } - - if (sp->warning) - list_warning_symbols = 1; - - sp->flags |= GS_REFERENCED; - - if (sp == dynamic_symbol || sp == got_symbol) { - if (type != (N_UNDF | N_EXT) && !(entry->flags & E_JUST_SYMS)) - errx(1,"Linker reserved symbol %s defined as type %x ", - name, type); - return; - } - - if (olddef && N_ISWEAK(&nzp->nlist) && !(sp->flags & GS_WEAK)) { -#ifdef DEBUG - printf("%s: not overridden by weak symbol from %s\n", - demangle(sp->name), get_file_name(entry)); -#endif - return; - } - - if (type == (N_SIZE | N_EXT)) { - - if (relocatable_output && nzp->nz_value != 0 && sp->size == 0) - size_sym_count++; - if (sp->size < nzp->nz_value) - sp->size = nzp->nz_value; - - } else if (type != (N_UNDF | N_EXT) || nzp->nz_value) { - - /* - * Set `->defined' here, so commons and undefined globals - * can be counted correctly. - */ - if (!sp->defined || sp->defined == (N_UNDF | N_EXT)) { - sp->defined = type; - } - - if ((sp->flags & GS_WEAK) && !N_ISWEAK(&nzp->nlist)) { - /* - * Upgrade an existing weak definition. - * We fake it by pretending the symbol is undefined; - * must undo any common fiddling, however. - */ - if (!oldref) - errx(1, "internal error: enter_glob_ref: " - "weak symbol not referenced"); - if (!olddef && !com) - undefined_weak_sym_count--; - undefined_global_sym_count++; - sp->defined = type; - sp->flags &= ~GS_WEAK; - olddef = 0; - if (com) - common_defined_global_count--; - com = 0; - sp->common_size = 0; - } - if (oldref && !olddef) { - /* - * It used to be undefined and we're defining it. - */ - undefined_global_sym_count--; - if (sp->flags & GS_WEAK) - /* Used to be a weak reference */ - undefined_weak_sym_count--; - if (undefined_global_sym_count < 0 || - undefined_weak_sym_count < 0) - errx(1, "internal error: enter_glob_ref: " - "undefined_global_sym_count = %d, " - "undefined_weak_sym_count = %d", - undefined_global_sym_count, - undefined_weak_sym_count); - - } - - if (N_ISWEAK(&nzp->nlist)) - /* The definition is weak */ - sp->flags |= GS_WEAK; - - if (!olddef && type == (N_UNDF | N_EXT) && nzp->nz_value) { - /* - * First definition and it's common. - */ - common_defined_global_count++; - sp->common_size = nzp->nz_value; - } else if (com && type != (N_UNDF | N_EXT)) { - /* - * It used to be common and we're defining - * it as something else. - */ - common_defined_global_count--; - sp->common_size = 0; - } else if (com && type == (N_UNDF | N_EXT) && - sp->common_size < nzp->nz_value) - /* - * It used to be common and this is a new common entry - * to which we need to pay attention. - */ - sp->common_size = nzp->nz_value; - - if (SET_ELEMENT_P(type) && (!olddef || com)) - set_vector_count++; - - } else if (!oldref && !com) { - /* - * An unreferenced symbol can already be defined - * as common by shared objects. - */ - undefined_global_sym_count++; - if (N_ISWEAK(&nzp->nlist)) { - /* The reference is weak */ - sp->flags |= GS_WEAK; - undefined_weak_sym_count++; - } - } - - if (sp == end_symbol && (entry->flags & E_JUST_SYMS) && - !T_flag_specified) - text_start = nzp->nz_value; - - if (sp->flags & GS_TRACE) { - register char *reftype; - switch (type & N_TYPE) { - case N_UNDF: - reftype = nzp->nz_value - ? "defined as common" : "referenced"; - break; - - case N_ABS: - reftype = "defined as absolute"; - break; - - case N_TEXT: - reftype = "defined in text section"; - break; - - case N_DATA: - reftype = "defined in data section"; - break; - - case N_BSS: - reftype = "defined in BSS section"; - break; - - case N_INDR: - reftype = "alias"; - break; - - case N_SIZE: - reftype = "size spec"; - break; - - default: - reftype = "I don't know this type"; - break; - } - - fprintf(stderr, "symbol %s %s%s in ", demangle(sp->name), - (N_ISWEAK(&nzp->nlist))?"weakly ":"", reftype); - print_file_name (entry, stderr); - fprintf(stderr, "\n"); - } -} - -/* - * This returns 0 if the given file entry's symbol table does *not* contain - * the nlist point entry, and it returns the files entry pointer (cast to - * unsigned long) if it does. - */ - -unsigned long -contains_symbol(entry, np) - struct file_entry *entry; - register struct nlist *np; -{ - if (np >= &entry->symbols->nzlist.nlist && - np < &(entry->symbols + entry->nsymbols)->nzlist.nlist) - return (unsigned long) entry; - return 0; -} - - -/* - * Having entered all the global symbols and found the sizes of sections of - * all files to be linked, make all appropriate deductions from this data. - * - * We propagate global symbol values from definitions to references. We compute - * the layout of the output file and where each input file's contents fit - * into it. - * - * This is now done in several stages. - * - * 1) All global symbols are examined for definitions in relocatable (.o) - * files. The symbols' type is set according to the definition found, - * but its value can not yet be determined. In stead, we keep a pointer - * to the file entry's localsymbol that bequeathed the global symbol with - * its definition. Also, multiple (incompatible) definitions are checked - * for in this pass. If no definition comes forward, the set of local - * symbols originating from shared objects is searched for a definition. - * - * 2) Then the relocation information of each relocatable file is examined - * for possible contributions to the RRS section. - * - * 3) When this is done, the sizes and start addresses are set of all segments - * that will appear in the output file (including the RRS segment). - * - * 4) Finally, all symbols are relocated according according to the start - * of the entry they are part of. Then global symbols are assigned their - * final values. Also, space for commons and imported data are allocated - * during this pass, if the link mode in effect so demands. - * - */ - -static void -digest_symbols() -{ - - if (trace_files) - fprintf(stderr, "Digesting symbol information:\n\n"); - - if (!relocatable_output) { - /* - * The set sector size is the number of set elements + a word - * for each symbol for the length word at the beginning of - * the vector, plus a word for each symbol for a zero at the - * end of the vector (for incremental linking). - */ - set_sect_size = (set_symbol_count + 2 * set_vector_count) * - sizeof (unsigned long); - set_vectors = (long *)xmalloc (set_sect_size); - setv_fill_count = 0; - } - - /* Pass 1: check and define symbols */ - defined_global_sym_count = 0; - digest_pass1(); - - each_full_file(consider_relocation, (void *)0); /* Text */ - each_full_file(consider_relocation, (void *)1); /* Data */ - - each_file(consider_local_symbols, (void *)0); - - /* - * Compute total size of sections. - * RRS data is the first output data section, RRS text is the last - * text section. Thus, DATA_START is calculated from RRS_DATA_START - * and RRS_DATA_SIZE, while RRS_TEXT_START is derived from TEXT_START - * and TEXT_SIZE. - */ - consider_rrs_section_lengths(); - each_full_file(consider_file_section_lengths, 0); - rrs_text_start = text_start + text_size; - text_size += rrs_text_size; - data_size += rrs_data_size; - - /* - * If necessary, pad text section to full page in the file. Include - * the padding in the text segment size. - */ - - if (page_align_segments || page_align_data) { - int text_end = text_size + N_TXTOFF(outheader); - text_pad = PALIGN(text_end, page_size) - text_end; - text_size += text_pad; - } - outheader.a_text = text_size; - - /* - * Make the data segment address start in memory on a suitable - * boundary. - */ - - if (!Tdata_flag_specified) - rrs_data_start = text_start + - DATA_START(outheader) - TEXT_START(outheader); - - data_start = rrs_data_start + rrs_data_size; - if (!relocatable_output) { - set_sect_start = rrs_data_start + data_size; - data_size += MALIGN(set_sect_size); - } - bss_start = rrs_data_start + data_size; - -#ifdef DEBUG -printf("textstart = %#x, textsize = %#x, rrs_text_start = %#x, rrs_text_size %#x\n", - text_start, text_size, rrs_text_start, rrs_text_size); -printf("datastart = %#x, datasize = %#x, rrs_data_start %#x, rrs_data_size %#x\n", - data_start, data_size, rrs_data_start, rrs_data_size); -printf("bssstart = %#x, bsssize = %#x\n", - bss_start, bss_size); -printf("set_sect_start = %#x, set_sect_size = %#x\n", - set_sect_start, set_sect_size); -#endif - - /* Compute start addresses of each file's sections and symbols. */ - - each_full_file(relocate_file_addresses, 0); - relocate_rrs_addresses(); - - /* Pass 2: assign values to symbols */ - digest_pass2(); - - if (end_symbol) { /* These are null if -r. */ - etext_symbol->value = text_start + text_size - text_pad; - edata_symbol->value = rrs_data_start + data_size; - end_symbol->value = rrs_data_start + data_size + bss_size; - } - /* - * Figure the data_pad now, so that it overlaps with the bss - * addresses. - */ - - if (specified_data_size && specified_data_size > data_size) - data_pad = specified_data_size - data_size; - - if (page_align_segments) - data_pad = PALIGN(data_pad + data_size, page_size) - data_size; - - bss_size -= data_pad; - if (bss_size < 0) - bss_size = 0; - - data_size += data_pad; - - /* - * Calculate total number of symbols that will go into - * the output symbol table (barring DISCARD_* settings). - */ - global_sym_count = defined_global_sym_count + - undefined_global_sym_count; - - if (dynamic_symbol->flags & GS_REFERENCED) - global_sym_count++; - - if (got_symbol->flags & GS_REFERENCED) - global_sym_count++; - - if (relocatable_output || building_shared_object) { - /* For each alias we write out two struct nlists */ - global_sym_count += global_alias_count; - /* Propagate warning symbols; costs two extra struct nlists */ - global_sym_count += 2 * warn_sym_count; - } - - if (relocatable_output) - /* We write out the original N_SIZE symbols */ - global_sym_count += size_sym_count; - -#ifdef DEBUG -printf( -"global symbols %d " -"(defined %d, undefined %d, weak %d, aliases %d, warnings 2 * %d, " -"size symbols %d)\ncommons %d, locals: %d, debug symbols: %d, set_symbols %d\n", - global_sym_count, - defined_global_sym_count, undefined_global_sym_count, - undefined_weak_sym_count, - global_alias_count, warn_sym_count, size_sym_count, - common_defined_global_count, local_sym_count, - debugger_sym_count, set_symbol_count); -#endif -} - -/* - * Determine the definition of each global symbol. - */ -static void -digest_pass1() -{ - - /* - * For each symbol, verify that it is defined globally at most - * once within relocatable files (except when building a shared lib). - * and set the `defined' field if there is a definition. - * - * Then check the shared object symbol chain for any remaining - * undefined symbols. Set the `so_defined' field for any - * definition find this way. - */ - FOR_EACH_SYMBOL(i, sp) { - symbol *spsave; - struct localsymbol *lsp; - int defs = 0; - - if (!(sp->flags & GS_REFERENCED)) { -#if 0 - /* Check for undefined symbols in shared objects */ - int type; - for (lsp = sp->sorefs; lsp; lsp = lsp->next) { - type = lsp->nzlist.nlist.n_type; - if ((type & N_EXT) && type != (N_UNDF | N_EXT)) - break; - } - if ((type & N_EXT) && type == (N_UNDF | N_EXT)) - undefined_shobj_sym_count++; -#endif - - /* Superfluous symbol from shared object */ - continue; - } - if (sp->so_defined) - /* Already examined; must have been an alias */ - continue; - - if (sp == got_symbol || sp == dynamic_symbol) - continue; - - for (lsp = sp->refs; lsp; lsp = lsp->next) { - register struct nlist *p = &lsp->nzlist.nlist; - register int type = p->n_type; - - if (SET_ELEMENT_P(type)) { - if (relocatable_output) - errx(1, - "internal error: global ref to set el %s with -r", - demangle(sp->name)); - if (!defs++) { - sp->defined = N_SETV | N_EXT; - sp->value = - setv_fill_count++ * sizeof(long); - } else if ((sp->defined & N_TYPE) != N_SETV) { - sp->mult_defs = 1; - multiple_def_count++; - } - /* Keep count and remember symbol */ - sp->setv_count++; - set_vectors[setv_fill_count++] = (long)p; - if (building_shared_object) { - struct relocation_info reloc; - - /* - * Make sure to relocate the contents - * of this set vector. - */ - bzero(&reloc, sizeof(reloc)); - RELOC_INIT_SEGMENT_RELOC(&reloc); - RELOC_ADDRESS(&reloc) = - setv_fill_count * sizeof(long); - alloc_rrs_segment_reloc(NULL, &reloc); - } - - } else if ((type & N_EXT) && type != (N_UNDF | N_EXT) - && (type & N_TYPE) != N_FN - && (type & N_TYPE) != N_SIZE) { - /* non-common definition */ - if (!N_ISWEAK(p)) - ++defs; - if (defs > 1) { - sp->mult_defs = 1; - multiple_def_count++; - } else if (!N_ISWEAK(p) || - (!sp->def_lsp && !sp->common_size)) { - sp->def_lsp = lsp; - lsp->entry->flags |= E_SYMBOLS_USED; - sp->defined = type; - sp->aux = N_AUX(p); - } - } - } - - /* - * If this symbol has acquired final definition, we're done. - * Commons must be allowed to bind to shared object data - * definitions. - */ - if (sp->defined && - (sp->common_size == 0 || - relocatable_output || building_shared_object)) { - if ((sp->defined & N_TYPE) == N_SETV) - /* Allocate zero entry in set vector */ - setv_fill_count++; - /* - * At this stage, we do not know whether an alias - * is going to be defined for real here, or whether - * it refers to a shared object symbol. The decision - * is deferred until digest_pass2(). - */ - if (!sp->alias) - defined_global_sym_count++; - continue; - } - - if (relocatable_output) - /* We're done */ - continue; - - /* - * Still undefined, search the shared object symbols for a - * definition. This symbol must go into the RRS. - */ - if (building_shared_object) { - /* Just punt for now */ - undefined_global_sym_count--; - if (undefined_global_sym_count < 0) - errx(1, - "internal error: digest_pass1,1: %s: undefined_global_sym_count = %d", - demangle(sp->name), undefined_global_sym_count); - continue; - } - - spsave=sp; /*XXX*/ - again: - for (lsp = sp->sorefs; lsp; lsp = lsp->next) { - register struct nlist *p = &lsp->nzlist.nlist; - register int type = p->n_type; - - if ((type & N_EXT) && type != (N_UNDF | N_EXT) && - (type & N_TYPE) != N_FN) { - /* non-common definition */ - if (sp->common_size) { - /* - * This common has an so defn; switch - * to it iff defn is: data, first-class - * and not weak. - */ - if (N_AUX(p) != AUX_OBJECT || - N_ISWEAK(p) || - (lsp->entry->flags & E_SECONDCLASS)) - continue; - - /* - * Change common to so ref. First, - * downgrade common to undefined. - */ - sp->common_size = 0; - sp->defined = 0; - common_defined_global_count--; - undefined_global_sym_count++; - } - sp->def_lsp = lsp; - sp->so_defined = type; - sp->aux = N_AUX(p); - if (lsp->entry->flags & E_SECONDCLASS) - /* Keep looking for something better */ - continue; - if (N_ISWEAK(p)) - /* Keep looking for something better */ - continue; - break; - } - } - if (sp->def_lsp) { -#ifdef DEBUG -printf("pass1: SO definition for %s, type %x in %s at %#x\n", - demangle(sp->name), sp->so_defined, get_file_name(sp->def_lsp->entry), - sp->def_lsp->nzlist.nz_value); -#endif - sp->def_lsp->entry->flags |= E_SYMBOLS_USED; - if (sp->flags & GS_REFERENCED) { - undefined_global_sym_count--; - } else - sp->flags |= GS_REFERENCED; - if (undefined_global_sym_count < 0) - errx(1, "internal error: digest_pass1,2: " - "%s: undefined_global_sym_count = %d", - demangle(sp->name), undefined_global_sym_count); - if (sp->alias && - !(sp->alias->flags & GS_REFERENCED)) { - sp = sp->alias; - goto again; - } - } else if (sp->defined) { - if (sp->common_size == 0) - errx(1, "internal error: digest_pass1,3: " - "%s: not a common: %x", - demangle(sp->name), sp->defined); - /* - * Common not bound to shared object data; treat - * it now like other defined symbols were above. - */ - if (!sp->alias) - defined_global_sym_count++; - } - sp=spsave; /*XXX*/ - } END_EACH_SYMBOL; - - if (setv_fill_count != set_sect_size/sizeof(long)) - errx(1, "internal error: allocated set symbol space (%d) " - "doesn't match actual (%d)", - set_sect_size/sizeof(long), setv_fill_count); -} - - -/* - * Scan relocation info in ENTRY for contributions to the RRS section - * of the output file. - */ -static void -consider_relocation(entry, dataseg) - struct file_entry *entry; - int dataseg; -{ - struct relocation_info *reloc, *end; - struct localsymbol *lsp; - symbol *sp; - - if (dataseg == 0) { - /* Text relocations */ - reloc = entry->textrel; - end = entry->textrel + entry->ntextrel; - } else { - /* Data relocations */ - reloc = entry->datarel; - end = entry->datarel + entry->ndatarel; - } - - for (; reloc < end; reloc++) { - - if (relocatable_output) { - lsp = &entry->symbols[reloc->r_symbolnum]; - if (RELOC_BASEREL_P(reloc)) { - pic_code_seen = 1; /* Compatibility */ - if (!RELOC_EXTERN_P(reloc)) - lsp->flags |= LS_RENAME; - } - continue; - } - - /* - * First, do the PIC specific relocs. - * r_relative and r_copy should not occur at this point - * (we do output them). The others break down to these - * combinations: - * - * jmptab: extern: needs jmp slot - * !extern: "intersegment" jump/call, - * should get resolved in output - * - * baserel: extern: need GOT entry - * !extern: may need GOT entry, - * machine dependent - * - * baserel's always refer to symbol through `r_symbolnum' - * whether extern or not. Internal baserels refer to statics - * that must be accessed either *through* the GOT table like - * global data, or by means of an offset from the GOT table. - * The macro RELOC_STATICS_THROUGH_GOT_P() determines which - * applies, since this is a machine (compiler?) dependent - * addressing mode. - */ - - if (RELOC_JMPTAB_P(reloc)) { - - if (!RELOC_EXTERN_P(reloc)) - continue; - - lsp = &entry->symbols[reloc->r_symbolnum]; - sp = lsp->symbol; - if (sp->alias) - sp = sp->alias; - if (sp->flags & GS_TRACE) { - fprintf(stderr, "symbol %s has jmpslot in %s\n", - demangle(sp->name), get_file_name(entry)); - } - alloc_rrs_jmpslot(entry, sp); - - } else if (RELOC_BASEREL_P(reloc)) { - - lsp = &entry->symbols[reloc->r_symbolnum]; - alloc_rrs_gotslot(entry, reloc, lsp); - if (pic_type != PIC_TYPE_NONE && - RELOC_PIC_TYPE(reloc) != pic_type) - errx(1, "%s: illegal reloc type mix", - get_file_name(entry)); - pic_type = RELOC_PIC_TYPE(reloc); - - } else if (RELOC_EXTERN_P(reloc)) { - - /* - * Non-PIC relocations. - * If the definition comes from a shared object - * we need a relocation entry in RRS. - * - * If the .so definition is N_TEXT a jmpslot is - * allocated. - * - * If it is N_DATA we allocate an address in BSS (?) - * and arrange for the data to be copied at run-time. - * The symbol is temporarily marked with N_SIZE in - * the `defined' field, so we know what to do in - * pass2() and during actual relocation. We convert - * the type back to something real again when writing - * out the symbols. - * - */ - lsp = &entry->symbols[reloc->r_symbolnum]; - sp = lsp->symbol; - if (sp == NULL) - errx(1, "%s: bogus relocation record", - get_file_name(entry)); - - if (sp->alias) - sp = sp->alias; - - /* - * Skip refs to _GLOBAL_OFFSET_TABLE_ and __DYNAMIC - */ - if (sp == got_symbol) { - if (!CHECK_GOT_RELOC(reloc)) - errx(1, - "%s: Unexpected relocation type for GOT symbol", - get_file_name(entry)); - continue; - } - - /* - * This symbol gives rise to a RRS entry - */ - - if (building_shared_object) { - if (sp->flags & GS_TRACE) { - fprintf(stderr, - "symbol %s RRS entry in %s\n", - demangle(sp->name), get_file_name(entry)); - } - alloc_rrs_reloc(entry, sp); - continue; - } - - if (force_alias_definition && sp->so_defined && - sp->aux == AUX_FUNC) { - - /* Call to shared library procedure */ - alloc_rrs_jmpslot(entry, sp); - - } else if (sp->size && sp->so_defined && - sp->aux == AUX_OBJECT) { - - /* Reference to shared library data */ - alloc_rrs_cpy_reloc(entry, sp); - sp->defined = N_SIZE; - - } else if (!sp->defined && sp->common_size == 0 && - sp->so_defined) - alloc_rrs_reloc(entry, sp); - - } else { - /* - * Segment relocation. - * Prepare an RRS relocation as these are load - * address dependent. - */ - if (building_shared_object && !RELOC_PCREL_P(reloc)) { - alloc_rrs_segment_reloc(entry, reloc); - } - } - } -} - -/* - * Determine the disposition of each local symbol. - */ -static void -consider_local_symbols(entry) - register struct file_entry *entry; -{ - register struct localsymbol *lsp, *lspend; - - if (entry->flags & E_DYNAMIC) - return; - - lspend = entry->symbols + entry->nsymbols; - - /* - * For each symbol determine whether it should go - * in the output symbol table. - */ - - for (lsp = entry->symbols; lsp < lspend; lsp++) { - register struct nlist *p = &lsp->nzlist.nlist; - register int type = p->n_type; - - if (type == N_WARNING) - continue; - - if (SET_ELEMENT_P (type)) { - /* - * This occurs even if global. These types of - * symbols are never written globally, though - * they are stored globally. - */ - if (relocatable_output) - lsp->flags |= LS_WRITE; - - } else if (!(type & (N_STAB | N_EXT))) { - - /* - * Ordinary local symbol - */ - if ((lsp->flags & LS_RENAME) || ( - discard_locals != DISCARD_ALL && - !(discard_locals == DISCARD_L && - (lsp->flags & LS_L_SYMBOL))) ) { - - lsp->flags |= LS_WRITE; - local_sym_count++; - } - - } else if (!(type & N_EXT)) { - - /* - * Debugger symbol - */ - if (strip_symbols == STRIP_NONE) { - lsp->flags |= LS_WRITE; - debugger_sym_count++; - } - } - } - - /* - * Count one for the local symbol that we generate, - * whose name is the file's name (usually) and whose address - * is the start of the file's text. - */ - if (discard_locals != DISCARD_ALL) - local_sym_count++; -} - -/* - * Accumulate the section sizes of input file ENTRY into the section sizes of - * the output file. - */ -static void -consider_file_section_lengths(entry) - register struct file_entry *entry; -{ - - entry->text_start_address = text_size; - /* If there were any vectors, we need to chop them off */ - text_size += entry->header.a_text; - entry->data_start_address = data_size; - data_size += entry->header.a_data; - entry->bss_start_address = bss_size; - bss_size += MALIGN(entry->header.a_bss); - - text_reloc_size += entry->header.a_trsize; - data_reloc_size += entry->header.a_drsize; -} - -/* - * Determine where the sections of ENTRY go into the output file, - * whose total section sizes are already known. - * Also relocate the addresses of the file's local and debugger symbols. - */ -static void -relocate_file_addresses(entry) - register struct file_entry *entry; -{ - register struct localsymbol *lsp, *lspend; - - entry->text_start_address += text_start; - /* - * Note that `data_start' and `data_size' have not yet been - * adjusted for `data_pad'. If they had been, we would get the wrong - * results here. - */ - entry->data_start_address += data_start; - entry->bss_start_address += bss_start; -#ifdef DEBUG -printf("%s: datastart: %#x, bss %#x\n", get_file_name(entry), - entry->data_start_address, entry->bss_start_address); -#endif - - lspend = entry->symbols + entry->nsymbols; - - for (lsp = entry->symbols; lsp < lspend; lsp++) { - register struct nlist *p = &lsp->nzlist.nlist; - register int type = p->n_type; - - /* - * If this belongs to a section, update it - * by the section's start address - */ - - switch (type & N_TYPE) { - case N_TEXT: - case N_SETT: - p->n_value += entry->text_start_address; - break; - case N_DATA: - case N_SETD: - case N_SETV: - /* - * A symbol whose value is in the data section is - * present in the input file as if the data section - * started at an address equal to the length of the - * file's text. - */ - p->n_value += entry->data_start_address - - entry->header.a_text; - break; - case N_BSS: - case N_SETB: - /* likewise for symbols with value in BSS. */ - p->n_value += entry->bss_start_address - - (entry->header.a_text + - entry->header.a_data); - break; - } - - } - -} - -/* - * Assign a value to each global symbol. - */ -static void -digest_pass2() -{ - FOR_EACH_SYMBOL(i, sp) { - int size; - int align = sizeof(int); - - if (!(sp->flags & GS_REFERENCED)) - continue; - - if (sp->alias && - (relocatable_output || building_shared_object || - (sp->alias->defined && !sp->alias->so_defined))) { - /* - * The alias points at a defined symbol, so it - * must itself be counted as one too, in order to - * compute the correct number of symbol table entries. - */ - if (!sp->defined) { - /* - * Change aliased symbol's definition too. - * These things happen if shared object commons - * or data is going into our symbol table. - */ - if (sp->so_defined != (N_INDR+N_EXT)) - warnx( "pass2: %s: alias isn't", - demangle(sp->name)); - sp->defined = sp->so_defined; - sp->so_defined = 0; - } - defined_global_sym_count++; - } - - /* - * Count the aliases that will appear in the output. - */ - if (sp->alias && !sp->so_defined && !sp->alias->so_defined && - (sp->defined || relocatable_output || - !building_shared_object)) - global_alias_count++; - - if ((sp->defined & N_TYPE) == N_SETV) { - /* - * Set length word at front of vector and zero byte - * at end. Reverse the vector itself to put it in - * file order. - */ - unsigned long i, *p, *q; - unsigned long length_word_index = - sp->value / sizeof(long); - - /* Relocate symbol value */ - sp->value += set_sect_start; - - set_vectors[length_word_index] = sp->setv_count; - - /* - * Relocate vector to final address. - */ - for (i = 0; i < sp->setv_count; i++) { - struct nlist *p = (struct nlist *) - set_vectors[1+i+length_word_index]; - - set_vectors[1+i+length_word_index] = p->n_value; - if (building_shared_object) { - struct relocation_info reloc; - - bzero(&reloc, sizeof(reloc)); - RELOC_INIT_SEGMENT_RELOC(&reloc); - RELOC_ADDRESS(&reloc) = - (1 + i + length_word_index) * - sizeof(long) - + set_sect_start; - RELOC_TYPE(&reloc) = - (p->n_type - (N_SETA - N_ABS)) & N_TYPE; - claim_rrs_segment_reloc(NULL, &reloc); - } - } - - /* - * Reverse the vector. - */ - p = &set_vectors[length_word_index + 1]; - q = &set_vectors[length_word_index + sp->setv_count]; - while (p < q) { - unsigned long tmp = *p; - *p++ = *q; - *q-- = tmp; - } - - /* Clear terminating entry */ - set_vectors[length_word_index + sp->setv_count + 1] = 0; - continue; - } - - if (sp->def_lsp) { - if (sp->defined && (sp->defined & ~N_EXT) != N_SETV) - sp->value = sp->def_lsp->nzlist.nz_value; - if (sp->so_defined && - (sp->def_lsp->entry->flags & E_SECONDCLASS)) - /* Flag second-hand definitions */ - undefined_global_sym_count++; - if (sp->flags & GS_TRACE) - printf("symbol %s assigned to location %#lx\n", - demangle(sp->name), sp->value); - } - - /* - * If not -r'ing, allocate common symbols in the BSS section. - */ - if (building_shared_object && !(link_mode & SYMBOLIC)) - /* No common allocation in shared objects */ - continue; - - if ((size = sp->common_size) != 0) { - /* - * It's a common. - */ - if (sp->defined != (N_UNDF + N_EXT)) - errx(1, "%s: common isn't", demangle(sp->name)); - - } else if ((size = sp->size) != 0 && sp->defined == N_SIZE) { - /* - * It's data from shared object with size info. - */ - if (!sp->so_defined) - errx(1, "%s: Bogus N_SIZE item", demangle(sp->name)); - - } else - /* - * It's neither - */ - continue; - - - if (relocatable_output && !force_common_definition) { - sp->defined = 0; - undefined_global_sym_count++; - defined_global_sym_count--; - continue; - } - - /* - * Round up to nearest sizeof (int). I don't know whether - * this is necessary or not (given that alignment is taken - * care of later), but it's traditional, so I'll leave it in. - * Note that if this size alignment is ever removed, ALIGN - * above will have to be initialized to 1 instead of sizeof - * (int). - */ - - size = PALIGN(size, sizeof(int)); - - while (align < MAX_ALIGNMENT && !(size & align)) - align <<= 1; - - bss_size = PALIGN(bss_size + data_size + rrs_data_start, align) - - (data_size + rrs_data_start); - - sp->value = rrs_data_start + data_size + bss_size; - if (sp->defined == (N_UNDF | N_EXT)) - sp->defined = N_BSS | N_EXT; - else { - sp->so_defined = 0; - defined_global_sym_count++; - } - bss_size += size; - if (write_map) - printf("Allocating %s %s: %x at %lx\n", - sp->defined==(N_BSS|N_EXT)?"common":"data", - demangle(sp->name), size, sp->value); - - } END_EACH_SYMBOL; -} - - -/* -------------------------------------------------------------------*/ - -/* Write the output file */ -void -write_output() -{ - struct stat statbuf; - int filemode; - mode_t u_mask; - - if (lstat(output_filename, &statbuf) == 0) { - if (S_ISREG(statbuf.st_mode)) - (void)unlink(output_filename); - } - - u_mask = umask(0); - (void)umask(u_mask); - - outstream = fopen(output_filename, "w"); - if (outstream == NULL) - err(1, "fopen: %s", output_filename); - - if (atexit(cleanup)) - err(1, "atexit"); - - if (fstat(fileno(outstream), &statbuf) < 0) - err(1, "fstat: %s", output_filename); - - filemode = statbuf.st_mode; - - if (S_ISREG(statbuf.st_mode) && - chmod(output_filename, filemode & ~0111) == -1) - err(1, "chmod: %s", output_filename); - - /* Output the a.out header. */ - write_header(); - - /* Output the text and data segments, relocating as we go. */ - write_text(); - write_data(); - - /* Output the merged relocation info, if requested with `-r'. */ - if (relocatable_output) - write_rel(); - - /* Output the symbol table (both globals and locals). */ - write_syms(); - - /* Output the RSS section */ - write_rrs(); - - if (chmod (output_filename, filemode | (0111 & ~u_mask)) == -1) - err(1, "chmod: %s", output_filename); - - fflush(outstream); - /* Report I/O error such as disk full. */ - if (ferror(outstream) || fclose(outstream) != 0) - err(1, "write_output: %s", output_filename); - outstream = 0; - if (real_output_filename) - if (rename(output_filename, real_output_filename)) - err(1, "rename output: %s to %s", - output_filename, real_output_filename); -} - -/* Total number of symbols to be written in the output file. */ -static int nsyms; - -void -write_header() -{ - int flags; - - if (link_mode & SHAREABLE) - /* Output is shared object */ - flags = EX_DYNAMIC | EX_PIC; - else if (relocatable_output && pic_code_seen) - /* Output is relocatable and contains PIC code */ - flags = EX_PIC; - else if (rrs_section_type == RRS_FULL) - /* Output is a dynamic executable */ - flags = EX_DYNAMIC; - else - /* - * Output is a static executable - * or a non-PIC relocatable object - */ - flags = 0; - - if (oldmagic && (flags & EX_DPMASK) && !(link_mode & FORCEDYNAMIC)) - warnx("Cannot set flag in old magic headers\n"); - - N_SET_FLAG (outheader, flags); - - outheader.a_text = text_size; - outheader.a_data = data_size; - outheader.a_bss = bss_size; - outheader.a_entry = (entry_symbol ? entry_symbol->value - : text_start + entry_offset); - - if (strip_symbols == STRIP_ALL) - nsyms = 0; - else - nsyms = global_sym_count + local_sym_count + debugger_sym_count; - - if (relocatable_output) - nsyms += set_symbol_count; - - outheader.a_syms = nsyms * sizeof (struct nlist); - - if (relocatable_output) { - outheader.a_trsize = text_reloc_size; - outheader.a_drsize = data_reloc_size; - } else { - outheader.a_trsize = 0; - outheader.a_drsize = 0; - } - - md_swapout_exec_hdr(&outheader); - mywrite(&outheader, 1, sizeof (struct exec), outstream); - md_swapin_exec_hdr(&outheader); - - /* - * Output whatever padding is required in the executable file - * between the header and the start of the text. - */ - -#ifndef COFF_ENCAPSULATE - padfile(N_TXTOFF(outheader) - sizeof outheader, outstream); -#endif -} - -/* - * Relocate the text segment of each input file - * and write to the output file. - */ -void -write_text() -{ - - if (trace_files) - fprintf(stderr, "Copying and relocating text:\n\n"); - - each_full_file(copy_text, 0); - file_close(); - - if (trace_files) - fprintf(stderr, "\n"); - - padfile(text_pad, outstream); -} - -/* - * Read the text segment contents of ENTRY, relocate them, and write the - * result to the output file. If `-r', save the text relocation for later - * reuse. - */ -void -copy_text(entry) - struct file_entry *entry; -{ - register char *bytes; - register int fd; - - if (trace_files) - prline_file_name(entry, stderr); - - fd = file_open(entry); - - /* Allocate space for the file's text section */ - bytes = (char *)alloca(entry->header.a_text); - - /* Deal with relocation information however is appropriate */ - if (entry->textrel == NULL) - errx(1, "%s: no text relocation", get_file_name(entry)); - - /* Read the text section into core. */ - if (lseek(fd, text_offset(entry), L_SET) == (off_t)-1) - err(1, "%s: copy_text: lseek", get_file_name(entry)); - if (entry->header.a_text != read(fd, bytes, entry->header.a_text)) - errx(1, "%s: copy_text: premature EOF", get_file_name(entry)); - - /* Relocate the text according to the text relocation. */ - perform_relocation (bytes, entry->header.a_text, - entry->textrel, entry->ntextrel, entry, 0); - - /* Write the relocated text to the output file. */ - mywrite(bytes, entry->header.a_text, 1, outstream); -} - -/* - * Relocate the data segment of each input file - * and write to the output file. - */ - -void -write_data() -{ - off_t pos; - - if (trace_files) - fprintf(stderr, "Copying and relocating data:\n\n"); - - pos = N_DATOFF(outheader) + data_start - rrs_data_start; - if (fseek(outstream, pos, SEEK_SET) != 0) - errx(1, "write_data: fseek"); - - each_full_file(copy_data, 0); - file_close(); - - /* - * Write out the set element vectors. See digest symbols for - * description of length of the set vector section. - */ - - if (set_vector_count) { - swap_longs(set_vectors, set_symbol_count + 2*set_vector_count); - mywrite(set_vectors, set_symbol_count + 2*set_vector_count, - sizeof (unsigned long), outstream); - } - - if (trace_files) - fprintf(stderr, "\n"); - - padfile(data_pad, outstream); -} - -/* - * Read the data segment contents of ENTRY, relocate them, and write the - * result to the output file. If `-r', save the data relocation for later - * reuse. See comments in `copy_text'. - */ -void -copy_data(entry) - struct file_entry *entry; -{ - register char *bytes; - register int fd; - - if (trace_files) - prline_file_name (entry, stderr); - - fd = file_open(entry); - - bytes = (char *)alloca(entry->header.a_data); - - if (entry->datarel == NULL) - errx(1, "%s: no data relocation", get_file_name(entry)); - - if (lseek(fd, text_offset(entry) + entry->header.a_text, L_SET) == - (off_t)-1) - err(1, "%s: copy_data: lseek", get_file_name(entry)); - if (entry->header.a_data != read(fd, bytes, entry->header.a_data)) - errx(1, "%s: copy_data: premature EOF", get_file_name(entry)); - - perform_relocation(bytes, entry->header.a_data, - entry->datarel, entry->ndatarel, entry, 1); - - mywrite(bytes, entry->header.a_data, 1, outstream); -} - -/* - * Relocate ENTRY's text or data section contents. DATA is the address of the - * contents, in core. DATA_SIZE is the length of the contents. PC_RELOCATION - * is the difference between the address of the contents in the output file - * and its address in the input file. RELOC is the address of the - * relocation info, in core. NRELOC says how many there are. - */ - -int pc_relocation; - -void -perform_relocation(data, data_size, reloc, nreloc, entry, dataseg) - char *data; - int data_size; - struct relocation_info *reloc; - int nreloc; - struct file_entry *entry; - int dataseg; -{ - - register struct relocation_info *r = reloc; - struct relocation_info *end = reloc + nreloc; - - int text_relocation = entry->text_start_address; - int data_relocation = entry->data_start_address - entry->header.a_text; - int bss_relocation = entry->bss_start_address - - entry->header.a_text - entry->header.a_data; - pc_relocation = dataseg - ? entry->data_start_address - entry->header.a_text - : entry->text_start_address; - - for (; r < end; r++) { - int addr = RELOC_ADDRESS(r); - long addend = md_get_addend(r, data+addr); - long relocation; - - /* - * Loop over the relocations again as we did in - * consider_relocation(), claiming the reserved RRS - * relocations. - */ - - if (addr >= data_size) - errx(1, "%s: relocation address out of range", - get_file_name(entry)); - - if (RELOC_JMPTAB_P(r)) { - - int symindex = RELOC_SYMBOL(r); - struct localsymbol *lsp = &entry->symbols[symindex]; - symbol *sp; - - if (symindex >= entry->nsymbols) - errx(1, "%s: relocation symbolnum out of range", - get_file_name(entry)); - - sp = lsp->symbol; - if (sp == NULL) - errx(1, "%s: bogus relocation record", - get_file_name(entry)); - if (sp->alias) - sp = sp->alias; - - if (relocatable_output) - relocation = addend; - else if (!RELOC_EXTERN_P(r)) { - relocation = addend + - data_relocation - text_relocation; - } else - relocation = addend + - claim_rrs_jmpslot(entry, r, sp, addend); - - } else if (RELOC_BASEREL_P(r)) { - - int symindex = RELOC_SYMBOL(r); - struct localsymbol *lsp = &entry->symbols[symindex]; - - if (symindex >= entry->nsymbols) - errx(1, "%s: relocation symbolnum out of range", - get_file_name(entry)); - - if (relocatable_output) - relocation = addend; - else if (!RELOC_EXTERN_P(r)) - relocation = claim_rrs_internal_gotslot( - entry, r, lsp, addend); - else - relocation = claim_rrs_gotslot( - entry, r, lsp, addend); - - } else if (RELOC_EXTERN_P(r)) { - - int symindex = RELOC_SYMBOL(r); - symbol *sp; - - if (symindex >= entry->nsymbols) - errx(1, "%s: relocation symbolnum out of range", - get_file_name(entry)); - - sp = entry->symbols[symindex].symbol; - if (sp == NULL) - errx(1, "%s: bogus relocation record", - get_file_name(entry)); - if (sp->alias) - sp = sp->alias; - - if (relocatable_output) { - relocation = addend; - /* - * In PIC code, we keep the reference to the - * external symbol, even if defined now. - */ - if (!pic_code_seen) - relocation += sp->value; - } else if (sp->defined) { - if (sp->flags & GS_TRACE) { - fprintf(stderr, - "symbol %s defined as %x in %s\n", - demangle(sp->name), sp->defined, - get_file_name(entry) ); - } - if (sp == got_symbol) { - /* Handle _GOT_ refs */ - relocation = addend + sp->value - + md_got_reloc(r); - } else if (building_shared_object) { - /* - * Normal (non-PIC) relocation needs - * to be converted into an RRS reloc - * when building a shared object. - */ - r->r_address += dataseg? - entry->data_start_address: - entry->text_start_address; - relocation = addend; - if (claim_rrs_reloc( - entry, r, sp, &relocation)) - continue; - } else if (sp->defined == N_SIZE) { - /* - * If size is known, arrange a - * run-time copy. - */ - if (!sp->size) - errx(1, "Copy item isn't: %s", - demangle(sp->name)); - - relocation = addend + sp->value; - r->r_address = sp->value; - claim_rrs_cpy_reloc(entry, r, sp); - } else - /* Plain old relocation */ - relocation = addend + sp->value; - } else { - /* - * If the symbol is undefined, we relocate it - * in a way similar to -r case. We use an - * RRS relocation to resolve the symbol at - * run-time. The r_address field is updated - * to reflect the changed position in the - * output file. - */ - if (sp->flags & GS_TRACE) { - fprintf(stderr, - "symbol %s claims RRS in %s%s\n", - demangle(sp->name), get_file_name(entry), - (sp->so_defined == (N_TEXT+N_EXT) && - sp->flags & GS_HASJMPSLOT)? - " (JMPSLOT)":""); - } - if (sp->so_defined == (N_TEXT+N_EXT) && - sp->flags & GS_HASJMPSLOT) { - /* - * Claim a jmpslot if one was allocated. - * - * At this point, a jmpslot can only - * result from a shared object reference - * while `force_alias' is in effect. - */ - relocation = addend + - claim_rrs_jmpslot( - entry, r, sp, addend); - } else { - r->r_address += dataseg? - entry->data_start_address: - entry->text_start_address; - relocation = addend; - if ((building_shared_object || - sp->so_defined) && - claim_rrs_reloc(entry, r, sp, - &relocation)) - continue; - } - } - - } else { - - switch (RELOC_TYPE(r)) { - case N_TEXT: - case N_TEXT | N_EXT: - relocation = addend + text_relocation; - break; - - case N_DATA: - case N_DATA | N_EXT: - /* - * A word that points to beginning of the the - * data section initially contains not 0 but - * rather the "address" of that section in - * the input file, which is the length of the - * file's text. - */ - relocation = addend + data_relocation; - break; - - case N_BSS: - case N_BSS | N_EXT: - /* - * Similarly, an input word pointing to the - * beginning of the bss initially contains - * the length of text plus data of the file. - */ - relocation = addend + bss_relocation; - break; - - case N_ABS: - case N_ABS | N_EXT: - /* - * Don't know why this code would occur, but - * apparently it does. - */ - break; - - default: - errx(1, "%s: nonexternal relocation invalid", - get_file_name(entry)); - } - - /* - * When building a shared object, these segment - * relocations need a "load address relative" - * RRS fixup. - */ - if (building_shared_object && !RELOC_PCREL_P(r)) { - r->r_address += dataseg? - entry->data_start_address: - entry->text_start_address; - claim_rrs_segment_reloc(entry, r); - } - } - - if (RELOC_PCREL_P(r)) - relocation -= pc_relocation; - - md_relocate(r, relocation, data+addr, relocatable_output); - - } -} - - -/* - * For relocatable_output only: write out the relocation, - * relocating the addresses-to-be-relocated. - */ -void -write_rel() -{ - int count = 0; - - if (trace_files) - fprintf(stderr, "Writing text relocation:\n\n"); - - /* - * Assign each global symbol a sequence number, giving the order - * in which `write_syms' will write it. - * This is so we can store the proper symbolnum fields - * in relocation entries we write. - */ - - /* BLECH - Assign number 0 to __DYNAMIC (!! Sun compatibility) */ - - if (dynamic_symbol->flags & GS_REFERENCED) - dynamic_symbol->symbolnum = count++; - FOR_EACH_SYMBOL(i, sp) { - if (sp == dynamic_symbol) - continue; - if (sp->warning) - count += 2; - if (!(sp->flags & GS_REFERENCED)) - continue; - sp->symbolnum = count++; - if (sp->size) - count++; - if (sp->alias) - count++; - } END_EACH_SYMBOL; - - if (count != global_sym_count) - errx(1, "internal error: write_rel: count = %d", count); - - each_full_file(assign_symbolnums, &count); - - /* Write out the relocations of all files, remembered from copy_text. */ - each_full_file(coptxtrel, 0); - - if (trace_files) - fprintf(stderr, "\nWriting data relocation:\n\n"); - - each_full_file(copdatrel, 0); - - if (trace_files) - fprintf(stderr, "\n"); -} - - -/* - * Assign symbol ordinal numbers to local symbols in each entry. - */ -static void -assign_symbolnums(entry, countp) - struct file_entry *entry; - int *countp; -{ - struct localsymbol *lsp, *lspend; - int n = *countp; - - lspend = entry->symbols + entry->nsymbols; - - if (discard_locals != DISCARD_ALL) - /* Count the N_FN symbol for this entry */ - n++; - - for (lsp = entry->symbols; lsp < lspend; lsp++) { - if (lsp->flags & LS_WRITE) - lsp->symbolnum = n++; - } - *countp = n; -} - -static void -coptxtrel(entry) - struct file_entry *entry; -{ - register struct relocation_info *r, *end; - register int reloc = entry->text_start_address; - - r = entry->textrel; - end = r + entry->ntextrel; - - for (; r < end; r++) { - register int symindex; - struct localsymbol *lsp; - symbol *sp; - - RELOC_ADDRESS(r) += reloc; - - symindex = RELOC_SYMBOL(r); - lsp = &entry->symbols[symindex]; - - if (!RELOC_EXTERN_P(r)) { - if (!pic_code_seen) - continue; - if (RELOC_BASEREL_P(r)) - RELOC_SYMBOL(r) = lsp->symbolnum; - continue; - } - - if (symindex >= entry->nsymbols) - errx(1, "%s: relocation symbolnum out of range", - get_file_name(entry)); - - sp = lsp->symbol; - -#ifdef N_INDR - /* Resolve indirection. */ - if ((sp->defined & ~N_EXT) == N_INDR) { - if (sp->alias == NULL) - errx(1, "internal error: alias in hyperspace"); - sp = sp->alias; - } -#endif - - /* - * If the symbol is now defined, change the external - * relocation to an internal one. - */ - - if (sp->defined) { - if (!pic_code_seen) { - RELOC_EXTERN_P(r) = 0; - RELOC_SYMBOL(r) = (sp->defined & N_TYPE); - } else - RELOC_SYMBOL(r) = sp->symbolnum; - } else - /* - * Global symbols come first. - */ - RELOC_SYMBOL(r) = sp->symbolnum; - } - md_swapout_reloc(entry->textrel, entry->ntextrel); - mywrite(entry->textrel, entry->ntextrel, - sizeof(struct relocation_info), outstream); -} - -static void -copdatrel(entry) - struct file_entry *entry; -{ - register struct relocation_info *r, *end; - /* - * Relocate the address of the relocation. Old address is relative to - * start of the input file's data section. New address is relative to - * start of the output file's data section. - */ - register int reloc = entry->data_start_address - text_size; - - r = entry->datarel; - end = r + entry->ndatarel; - - for (; r < end; r++) { - register int symindex; - symbol *sp; - int symtype; - - RELOC_ADDRESS(r) += reloc; - - if (!RELOC_EXTERN_P(r)) { - if (RELOC_BASEREL_P(r)) - errx(1, "%s: Unsupported relocation type", - get_file_name(entry)); - continue; - } - - symindex = RELOC_SYMBOL(r); - sp = entry->symbols[symindex].symbol; - - if (symindex >= entry->header.a_syms) - errx(1, "%s: relocation symbolnum out of range", - get_file_name(entry)); - -#ifdef N_INDR - /* Resolve indirection. */ - if ((sp->defined & ~N_EXT) == N_INDR) { - if (sp->alias == NULL) - errx(1, "internal error: alias in hyperspace"); - sp = sp->alias; - } -#endif - - symtype = sp->defined & N_TYPE; - - if (!pic_code_seen && ( symtype == N_BSS || - symtype == N_DATA || - symtype == N_TEXT || - symtype == N_ABS)) { - RELOC_EXTERN_P(r) = 0; - RELOC_SYMBOL(r) = symtype; - } else - /* - * Global symbols come first. - */ - RELOC_SYMBOL(r) = - entry->symbols[symindex].symbol->symbolnum; - } - md_swapout_reloc(entry->datarel, entry->ndatarel); - mywrite(entry->datarel, entry->ndatarel, - sizeof(struct relocation_info), outstream); -} - -void write_file_syms __P((struct file_entry *, int *)); -void write_string_table __P((void)); - -/* Offsets and current lengths of symbol and string tables in output file. */ - -static int symtab_offset; -static int symtab_len; - -/* Address in output file where string table starts. */ -static int strtab_offset; - -/* Offset within string table - where the strings in `strtab_vector' should be written. */ -static int strtab_len; - -/* Total size of string table strings allocated so far, - including strings in `strtab_vector'. */ -static int strtab_size; - -/* Vector whose elements are strings to be added to the string table. */ -static char **strtab_vector; - -/* Vector whose elements are the lengths of those strings. */ -static int *strtab_lens; - -/* Index in `strtab_vector' at which the next string will be stored. */ -static int strtab_index; - -/* - * Add the string NAME to the output file string table. Record it in - * `strtab_vector' to be output later. Return the index within the string - * table that this string will have. - */ - -static int -assign_string_table_index(name) - char *name; -{ - register int index = strtab_size; - register int len = strlen(name) + 1; - - strtab_size += len; - strtab_vector[strtab_index] = name; - strtab_lens[strtab_index++] = len; - - return index; -} - -/* - * Write the contents of `strtab_vector' into the string table. This is done - * once for each file's local&debugger symbols and once for the global - * symbols. - */ -void -write_string_table() -{ - register int i; - - if (fseek(outstream, strtab_offset + strtab_len, SEEK_SET) != 0) - err(1, "write_string_table: %s: fseek", output_filename); - - for (i = 0; i < strtab_index; i++) { - mywrite(strtab_vector[i], strtab_lens[i], 1, outstream); - strtab_len += strtab_lens[i]; - } -} - -/* Write the symbol table and string table of the output file. */ - -void -write_syms() -{ - /* Number of symbols written so far. */ - int syms_written = 0; - struct nlist nl; - - /* - * Buffer big enough for all the global symbols. One extra struct - * for each indirect symbol to hold the extra reference following. - */ - struct nlist *buf = (struct nlist *) - alloca(global_sym_count * sizeof(struct nlist)); - /* Pointer for storing into BUF. */ - register struct nlist *bufp = buf; - - /* Size of string table includes the bytes that store the size. */ - strtab_size = sizeof strtab_size; - - symtab_offset = N_SYMOFF(outheader); - symtab_len = 0; - strtab_offset = N_STROFF(outheader); - strtab_len = strtab_size; - - if (strip_symbols == STRIP_ALL) - return; - - /* First, write out the global symbols. */ - - /* - * Allocate two vectors that record the data to generate the string - * table from the global symbols written so far. This must include - * extra space for the references following indirect outputs. - */ - - strtab_vector = (char **)alloca((global_sym_count) * sizeof(char *)); - strtab_lens = (int *)alloca((global_sym_count) * sizeof(int)); - strtab_index = 0; - - /* - * __DYNAMIC symbol *must* be first for Sun compatibility, as Sun's - * ld.so reads the shared object's first symbol. This means that - * (Sun's) shared libraries cannot be stripped! (We only assume - * that __DYNAMIC is the first item in the data segment) - * - * If defined (ie. not relocatable_output), make it look - * like an internal symbol. - */ - if (dynamic_symbol->flags & GS_REFERENCED) { - nl.n_other = 0; - nl.n_desc = 0; - nl.n_type = dynamic_symbol->defined; - if (nl.n_type == N_UNDF) - nl.n_type |= N_EXT; - else - nl.n_type &= ~N_EXT; - nl.n_value = dynamic_symbol->value; - nl.n_un.n_strx = assign_string_table_index(dynamic_symbol->name); - *bufp++ = nl; - syms_written++; - } - - /* Scan the symbol hash table, bucket by bucket. */ - - FOR_EACH_SYMBOL(i, sp) { - - if (sp == dynamic_symbol) - /* Already dealt with above */ - continue; - - /* - * Propagate N_WARNING symbols. - */ - if ((relocatable_output || building_shared_object) - && sp->warning) { - nl.n_type = N_WARNING; - nl.n_un.n_strx = assign_string_table_index(sp->warning); - nl.n_value = 0; - nl.n_other = 0; - nl.n_desc = 0; - *bufp++ = nl; - syms_written++; - - nl.n_type = N_UNDF + N_EXT; - nl.n_un.n_strx = assign_string_table_index(sp->name); - nl.n_value = 0; - nl.n_other = 0; - nl.n_desc = 0; - *bufp++ = nl; - syms_written++; - } - - if (!(sp->flags & GS_REFERENCED)) - /* Came from shared object but was not used */ - continue; - - if (sp->so_defined || (sp->alias && sp->alias->so_defined)) - /* - * Definition came from shared object, - * don't mention it here - */ - continue; - - if (!sp->defined && !relocatable_output) { - /* - * We're building a shared object and there - * are still undefined symbols. Don't output - * these, symbol was discounted in digest_pass1() - * (they are in the RRS symbol table). - */ - if (building_shared_object) - continue; - if (!(sp->flags & GS_WEAK)) - warnx("symbol %s remains undefined", demangle(sp->name)); - } - - if (syms_written >= global_sym_count) - errx(1, - "internal error: number of symbols exceeds alloc'd %d", - global_sym_count); - - /* - * Construct a `struct nlist' for the symbol. - */ - nl.n_other = 0; - nl.n_desc = 0; - - if (sp->defined > 1) { - /* - * defined with known type - */ - if (!relocatable_output && !building_shared_object && - sp->alias && sp->alias->defined > 1) { - /* - * If the target of an indirect symbol has - * been defined and we are outputting an - * executable, resolve the indirection; it's - * no longer needed. - */ - nl.n_type = sp->alias->defined; - nl.n_value = sp->alias->value; - nl.n_other = N_OTHER(0, sp->alias->aux); - } else { - int bind = 0; - - if (sp->defined == N_SIZE) - nl.n_type = N_DATA | N_EXT; - else - nl.n_type = sp->defined; - if (nl.n_type == (N_INDR|N_EXT) && - sp->value != 0) - errx(1, "%s: N_INDR has value %#lx", - demangle(sp->name), sp->value); - nl.n_value = sp->value; - if (sp->def_lsp) - bind = N_BIND(&sp->def_lsp->nzlist.nlist); - nl.n_other = N_OTHER(bind, sp->aux); - } - - } else if (sp->common_size) { - /* - * defined as common but not allocated, - * happens only with -r and not -d, write out - * a common definition. - * - * common condition needs to be before undefined - * condition because unallocated commons are set - * undefined in digest_symbols. - */ - nl.n_type = N_UNDF | N_EXT; - nl.n_value = sp->common_size; - } else if (!sp->defined) { - /* undefined -- legit only if -r */ - nl.n_type = N_UNDF | N_EXT; - nl.n_value = 0; - } else - errx(1, - "internal error: %s defined in mysterious way", - demangle(sp->name)); - - /* - * Allocate string table space for the symbol name. - */ - - nl.n_un.n_strx = assign_string_table_index(sp->name); - - /* Output to the buffer and count it. */ - - *bufp++ = nl; - syms_written++; - - /* - * Write second symbol of an alias pair. - */ - if (nl.n_type == N_INDR + N_EXT) { - if (sp->alias == NULL) - errx(1, "internal error: alias in hyperspace"); - nl.n_type = N_UNDF + N_EXT; - nl.n_un.n_strx = - assign_string_table_index(sp->alias->name); - nl.n_value = 0; - nl.n_other = 0; - nl.n_desc = 0; - *bufp++ = nl; - syms_written++; - } - - /* - * Write N_SIZE symbol for a symbol with a known size. - */ - if (relocatable_output && sp->size) { - nl.n_type = N_SIZE + N_EXT; - nl.n_un.n_strx = assign_string_table_index(sp->name); - nl.n_value = sp->size; - nl.n_other = 0; - nl.n_desc = 0; - *bufp++ = nl; - syms_written++; - } - -#ifdef DEBUG -printf("writesym(#%d): %s, type %x\n", syms_written, demangle(sp->name), sp->defined); -#endif - } END_EACH_SYMBOL; - - if (syms_written != strtab_index || strtab_index != global_sym_count) - errx(1, "internal error: wrong number (%d) of global symbols " - "written into output file, should be %d", - syms_written, global_sym_count); - - /* Output the buffer full of `struct nlist's. */ - - if (fseek(outstream, symtab_offset + symtab_len, SEEK_SET) != 0) - err(1, "write_syms: fseek"); - md_swapout_symbols(buf, bufp - buf); - mywrite(buf, bufp - buf, sizeof(struct nlist), outstream); - symtab_len += sizeof(struct nlist) * (bufp - buf); - - /* Write the strings for the global symbols. */ - write_string_table(); - - /* Write the local symbols defined by the various files. */ - each_file(write_file_syms, (void *)&syms_written); - file_close(); - - if (syms_written != nsyms) - errx(1, "internal error: wrong number of symbols (%d) " - "written into output file, should be %d", - syms_written, nsyms); - - if (symtab_offset + symtab_len != strtab_offset) - errx(1, - "internal error: inconsistent symbol table length: %d vs %d", - symtab_offset + symtab_len, strtab_offset); - - if (fseek(outstream, strtab_offset, SEEK_SET) != 0) - err(1, "write_syms: fseek"); - strtab_size = md_swap_long(strtab_size); - mywrite(&strtab_size, sizeof(int), 1, outstream); -} - - -/* - * Write the local and debugger symbols of file ENTRY. Increment - * *SYMS_WRITTEN_ADDR for each symbol that is written. - */ - -/* - * Note that we do not combine identical names of local symbols. dbx or gdb - * would be confused if we did that. - */ -void -write_file_syms(entry, syms_written_addr) - struct file_entry *entry; - int *syms_written_addr; -{ - struct localsymbol *lsp, *lspend; - - /* Upper bound on number of syms to be written here. */ - int max_syms = entry->nsymbols + 1; - - /* - * Buffer to accumulate all the syms before writing them. It has one - * extra slot for the local symbol we generate here. - */ - struct nlist *buf = (struct nlist *) - alloca(max_syms * sizeof(struct nlist)); - - register struct nlist *bufp = buf; - - if (entry->flags & E_DYNAMIC) - return; - - /* - * Make tables that record, for each symbol, its name and its name's - * length. The elements are filled in by `assign_string_table_index'. - */ - - strtab_vector = (char **)alloca(max_syms * sizeof(char *)); - strtab_lens = (int *)alloca(max_syms * sizeof(int)); - strtab_index = 0; - - /* Generate a local symbol for the start of this file's text. */ - - if (discard_locals != DISCARD_ALL) { - struct nlist nl; - - nl.n_type = N_FN | N_EXT; - nl.n_un.n_strx = - assign_string_table_index(entry->local_sym_name); - nl.n_value = entry->text_start_address; - nl.n_desc = 0; - nl.n_other = 0; - *bufp++ = nl; - (*syms_written_addr)++; - } - /* Read the file's string table. */ - - entry->strings = (char *)alloca(entry->string_size); - read_entry_strings(file_open(entry), entry); - - lspend = entry->symbols + entry->nsymbols; - - for (lsp = entry->symbols; lsp < lspend; lsp++) { - register struct nlist *p = &lsp->nzlist.nlist; - char *name; - - if (!(lsp->flags & LS_WRITE)) - continue; - - if (discard_locals == DISCARD_ALL || - (discard_locals == DISCARD_L && - (lsp->flags & LS_L_SYMBOL))) { - /* - * The user wants to discard this symbol, but it - * is referenced by a relocation. We can still - * save some file space by suppressing the unique - * renaming of the symbol. - */ - lsp->flags &= ~LS_RENAME; - } - - if (p->n_un.n_strx == 0) - name = NULL; - else if (!(lsp->flags & LS_RENAME)) - name = p->n_un.n_strx + entry->strings; - else { - char *cp = p->n_un.n_strx + entry->strings; - name = (char *)alloca( - strlen(entry->local_sym_name) + - strlen(cp) + 2 ); - (void)sprintf(name, "%s.%s", entry->local_sym_name, cp); - } - - /* - * If this symbol has a name, allocate space for it - * in the output string table. - */ - - if (name) - p->n_un.n_strx = assign_string_table_index(name); - - /* Output this symbol to the buffer and count it. */ - - *bufp++ = *p; - (*syms_written_addr)++; - } - - /* All the symbols are now in BUF; write them. */ - - if (fseek(outstream, symtab_offset + symtab_len, SEEK_SET) != 0) - err(1, "write local symbols: fseek"); - md_swapout_symbols(buf, bufp - buf); - mywrite(buf, bufp - buf, sizeof(struct nlist), outstream); - symtab_len += sizeof(struct nlist) * (bufp - buf); - - /* - * Write the string-table data for the symbols just written, using - * the data in vectors `strtab_vector' and `strtab_lens'. - */ - - write_string_table(); - entry->strings = 0; /* Since it will disappear anyway. */ -} - -/* - * Parse the string ARG using scanf format FORMAT, and return the result. - * If it does not parse, report fatal error - * generating the error message using format string ERROR and ARG as arg. - */ - -static int -parse(arg, format, error) - char *arg, *format, *error; -{ - int x; - - if (1 != sscanf(arg, format, &x)) - errx(1, error, arg); - return x; -} - -/* - * Output COUNT*ELTSIZE bytes of data at BUF to the descriptor FD. - */ -void -mywrite(buf, count, eltsize, fd) - void *buf; - int count; - int eltsize; - FILE *fd; -{ - - if (fwrite(buf, eltsize, count, fd) != count) - err(1, "write"); -} - -static void -cleanup() -{ - struct stat statbuf; - - if (outstream == 0) - return; - - if (fstat(fileno(outstream), &statbuf) == 0) { - if (S_ISREG(statbuf.st_mode)) - (void)unlink(output_filename); - } -} - -/* - * Output PADDING zero-bytes to descriptor FD. - * PADDING may be negative; in that case, do nothing. - */ -void -padfile(padding, fd) - int padding; - FILE *fd; -{ - register char *buf; - if (padding <= 0) - return; - - buf = (char *)alloca(padding); - bzero(buf, padding); - mywrite(buf, padding, 1, fd); -} - -static void -list_files() -{ - int error, i; - - error = 0; - for (i = 0; i < number_of_files; i++) { - register struct file_entry *entry = &file_table[i]; - int fd; - - if (entry->flags & E_SEARCH_DIRS) - fd = findlib(entry); - else - fd = open(entry->filename, O_RDONLY, 0); - if (fd < 0) - error = 1; - else - close(fd); - - /* - * Print the name even if the file doesn't exist except in - * the -lfoo case. This allows `ld -f' to work as well as - * possible when it is used to generate dependencies before - * the libraries exist. - */ - if (fd >= 0 || !(entry->flags & E_SEARCH_DIRS)) - printf("%s\n", entry->filename); - } - exit(error); -} |