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strip.c
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strip.c
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/*
* Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this
* file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/
/*
* The strip(1) and nmedit(l) program. This understands only Mach-O format
* files (with the restriction the symbol table is at the end of the file) and
* fat files with Mach-O files in them.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <ctype.h>
#include <libc.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <mach-o/loader.h>
#include <mach-o/reloc.h>
#include <mach-o/nlist.h>
#include <mach-o/stab.h>
#include "stuff/breakout.h"
#include "stuff/allocate.h"
#include "stuff/errors.h"
#include "stuff/rnd.h"
#include "stuff/reloc.h"
#include "stuff/reloc.h"
#include "stuff/symbol_list.h"
#include "stuff/unix_standard_mode.h"
#include "stuff/execute.h"
#ifdef TRIE_SUPPORT
#include <mach-o/prune_trie.h>
#endif /* TRIE_SUPPORT */
/* These are set from the command line arguments */
__private_extern__
char *progname = NULL; /* name of the program for error messages (argv[0]) */
static char *output_file;/* name of the output file */
static char *sfile; /* filename of global symbol names to keep */
static char *Rfile; /* filename of global symbol names to remove */
static uint32_t Aflag; /* save only absolute symbols with non-zero value and
.objc_class_name_* symbols */
static uint32_t iflag; /* -i ignore symbols in -s file not in object */
#ifdef NMEDIT
static uint32_t pflag; /* make all defined global symbols private extern */
#else /* !defined(NMEDIT) */
static char *dfile; /* filename of filenames of debugger symbols to keep */
static uint32_t uflag; /* save undefined symbols */
static uint32_t rflag; /* save symbols referenced dynamically */
static uint32_t nflag; /* save N_SECT global symbols */
static uint32_t Sflag; /* -S strip only debugger symbols N_STAB */
static uint32_t xflag; /* -x strip non-globals */
static uint32_t Xflag; /* -X strip local symbols with 'L' names */
static uint32_t cflag; /* -c strip section contents from dynamic libraries
files to create stub libraries */
static uint32_t no_uuid;/* -no_uuid strip LC_UUID load commands */
static uint32_t vflag; /* -v for verbose debugging ld -r executions */
static uint32_t lflag; /* -l do ld -r executions even if it has bugs */
static uint32_t strip_all = 1;
/*
* This is set on an object by object basis if the strip_all flag is still set
* and the object is an executable that is for use with the dynamic linker.
* This has the same effect as -r and -u.
*/
static enum bool default_dyld_executable = FALSE;
#endif /* NMEDIT */
/*
* Data structures to perform selective stripping of symbol table entries.
* save_symbols is the names of the symbols from the -s <file> argument.
* remove_symbols is the names of the symbols from the -R <file> argument.
*/
static struct symbol_list *save_symbols = NULL;
static uint32_t nsave_symbols = 0;
static struct symbol_list *remove_symbols = NULL;
static uint32_t nremove_symbols = 0;
/*
* saves points to an array of uint32_t's that is allocated. This array is a
* map of old symbol indexes to new symbol indexes. The new symbol indexes are
* plus 1 and zero value means that old symbol is not in the new symbol table.
* ref_saves is used in the same way but for the reference table.
* nmedits is an array and indexed by the symbol index the value indicates if
* the symbol was edited and turned into a non-global.
*/
static int32_t *saves = NULL;
#ifndef NMEDIT
static int32_t *ref_saves = NULL;
#else
static enum bool *nmedits = NULL;
#endif
/*
* These hold pointers to the symbol, string and indirect tables being worked on
* by strip_object and strip_symtab() from an input object file or possiblity
* changed to an ld -r (-S or -x) file by make_ld_r_object().
*/
static struct nlist *symbols = NULL;
static struct nlist_64 *symbols64 = NULL;
static uint32_t nsyms = 0;
static char *strings = NULL;
static uint32_t strsize = 0;
static uint32_t *indirectsyms = NULL;
static uint32_t nindirectsyms = 0;
/*
* These hold the new symbol and string table created by strip_symtab()
* and the new counts of local, defined external and undefined symbols.
*/
static struct nlist *new_symbols = NULL;
static struct nlist_64 *new_symbols64 = NULL;
static uint32_t new_nsyms = 0;
static char *new_strings = NULL;
static uint32_t new_strsize = 0;
static uint32_t new_nlocalsym = 0;
static uint32_t new_nextdefsym = 0;
static uint32_t new_nundefsym = 0;
#if defined(TRIE_SUPPORT) && !defined(NMEDIT)
/*
* The index into the new symbols where the defined external start.
*/
static uint32_t inew_nextdefsym = 0;
#endif
/*
* These hold the new table of contents, reference table and module table for
* dylibs.
*/
static struct dylib_table_of_contents *new_tocs = NULL;
static uint32_t new_ntoc = 0;
static struct dylib_reference *new_refs = NULL;
static uint32_t new_nextrefsyms = 0;
#ifdef NMEDIT
static struct dylib_module *new_mods = NULL;
static struct dylib_module_64 *new_mods64 = NULL;
static uint32_t new_nmodtab = 0;
#endif
#ifndef NMEDIT
/*
* The list of file names to save debugging symbols from.
*/
static char **debug_filenames = NULL;
static uint32_t ndebug_filenames = 0;
struct undef_map {
uint32_t index;
struct nlist symbol;
};
struct undef_map64 {
uint32_t index;
struct nlist_64 symbol64;
};
static char *qsort_strings = NULL;
#endif /* !defined(NMEDIT) */
/* Internal routines */
static void usage(
void);
static void strip_file(
char *input_file,
struct arch_flag *arch_flags,
uint32_t narch_flags,
enum bool all_archs);
static void strip_arch(
struct arch *archs,
uint32_t narchs,
struct arch_flag *arch_flags,
uint32_t narch_flags,
enum bool all_archs);
static void strip_object(
struct arch *arch,
struct member *member,
struct object *object);
static uint32_t get_starting_syminfo_offset(
struct object *object);
static void check_object_relocs(
struct arch *arch,
struct member *member,
struct object *object,
char *segname,
char *sectname,
uint64_t sectsize,
char *contents,
struct relocation_info *relocs,
uint32_t nreloc,
struct nlist *symbols,
struct nlist_64 *symbols64,
uint32_t nsyms,
char *strings,
int32_t *missing_reloc_symbols,
enum byte_sex host_byte_sex);
static void check_indirect_symtab(
struct arch *arch,
struct member *member,
struct object *object,
uint32_t nitems,
uint32_t reserved1,
uint32_t section_type,
char *contents,
struct nlist *symbols,
struct nlist_64 *symbols64,
uint32_t nsyms,
char *strings,
int32_t *missing_reloc_symbols,
enum byte_sex host_byte_sex);
#ifndef NMEDIT
static enum bool strip_symtab(
struct arch *arch,
struct member *member,
struct object *object,
struct dylib_table_of_contents *tocs,
uint32_t ntoc,
struct dylib_module *mods,
struct dylib_module_64 *mods64,
uint32_t nmodtab,
struct dylib_reference *refs,
uint32_t nextrefsyms);
#ifdef TRIE_SUPPORT
static int prune(
const char *name);
#endif /* TRIE_SUPPORT */
static void make_ld_r_object(
struct arch *arch,
struct member *member,
struct object *object);
static void strip_LC_UUID_commands(
struct arch *arch,
struct member *member,
struct object *object);
#ifndef NMEDIT
static void strip_LC_CODE_SIGNATURE_commands(
struct arch *arch,
struct member *member,
struct object *object);
#endif /* !(NMEDIT) */
static enum bool private_extern_reference_by_module(
uint32_t symbol_index,
struct dylib_reference *refs,
uint32_t nextrefsyms);
static enum bool symbol_pointer_used(
uint32_t symbol_index,
uint32_t *indirectsyms,
uint32_t nindirectsyms);
static int cmp_qsort_undef_map(
const struct undef_map *sym1,
const struct undef_map *sym2);
static int cmp_qsort_undef_map_64(
const struct undef_map64 *sym1,
const struct undef_map64 *sym2);
#endif /* !defined(NMEDIT) */
#ifdef NMEDIT
static enum bool edit_symtab(
struct arch *arch,
struct member *member,
struct object *object,
struct nlist *symbols,
struct nlist_64 *symbols64,
uint32_t nsyms,
char *strings,
uint32_t strsize,
struct dylib_table_of_contents *tocs,
uint32_t ntoc,
struct dylib_module *mods,
struct dylib_module_64 *mods64,
uint32_t nmodtab,
struct dylib_reference *refs,
uint32_t nextrefsyms);
#endif /* NMEDIT */
#ifndef NMEDIT
static void setup_debug_filenames(
char *dfile);
static int cmp_qsort_filename(
const char **name1,
const char **name2);
static int cmp_bsearch_filename(
const char *name1,
const char **name2);
#endif /* NMEDIT */
#ifdef NMEDIT
/*
* This variable and routines are used for nmedit(1) only.
*/
static char *global_strings = NULL;
static int cmp_qsort_global(
const struct nlist **sym1,
const struct nlist **sym2);
static int cmp_qsort_global_64(
const struct nlist_64 **sym1,
const struct nlist_64 **sym2);
static int cmp_bsearch_global_stab(
const char *name,
const struct nlist **sym);
static int cmp_bsearch_global_stab_64(
const char *name,
const struct nlist_64 **sym);
static int cmp_bsearch_global(
const char *name,
const struct nlist **sym);
static int cmp_bsearch_global_64(
const char *name,
const struct nlist_64 **sym);
#endif /* NMEDIT */
/* apple_version is created by the libstuff/Makefile */
extern char apple_version[];
char *version = apple_version;
int
main(
int argc,
char *argv[],
char *envp[])
{
int i;
uint32_t j, args_left, files_specified;
struct arch_flag *arch_flags;
uint32_t narch_flags;
enum bool all_archs;
struct symbol_list *sp;
progname = argv[0];
arch_flags = NULL;
narch_flags = 0;
all_archs = FALSE;
files_specified = 0;
args_left = 1;
for (i = 1; i < argc; i++){
if(argv[i][0] == '-'){
if(argv[i][1] == '\0'){
args_left = 0;
break;
}
if(strcmp(argv[i], "-o") == 0){
if(i + 1 >= argc)
fatal("-o requires an argument");
if(output_file != NULL)
fatal("only one -o option allowed");
output_file = argv[i + 1];
i++;
}
else if(strcmp(argv[i], "-s") == 0){
if(i + 1 >= argc)
fatal("-s requires an argument");
if(sfile != NULL)
fatal("only one -s option allowed");
sfile = argv[i + 1];
i++;
}
else if(strcmp(argv[i], "-R") == 0){
if(i + 1 >= argc)
fatal("-R requires an argument");
if(Rfile != NULL)
fatal("only one -R option allowed");
Rfile = argv[i + 1];
i++;
}
#ifndef NMEDIT
else if(strcmp(argv[i], "-d") == 0){
if(i + 1 >= argc)
fatal("-d requires an argument");
if(dfile != NULL)
fatal("only one -d option allowed");
dfile = argv[i + 1];
i++;
}
else if(strcmp(argv[i], "-no_uuid") == 0){
no_uuid = 1;
}
#endif /* !defined(NMEDIT) */
else if(strcmp(argv[i], "-arch") == 0){
if(i + 1 == argc){
error("missing argument(s) to %s option", argv[i]);
usage();
}
if(strcmp("all", argv[i+1]) == 0){
all_archs = TRUE;
}
else{
arch_flags = reallocate(arch_flags,
(narch_flags + 1) * sizeof(struct arch_flag));
if(get_arch_from_flag(argv[i+1],
arch_flags + narch_flags) == 0){
error("unknown architecture specification flag: "
"%s %s", argv[i], argv[i+1]);
arch_usage();
usage();
}
for(j = 0; j < narch_flags; j++){
if(arch_flags[j].cputype ==
arch_flags[narch_flags].cputype &&
(arch_flags[j].cpusubtype & ~CPU_SUBTYPE_MASK) ==
(arch_flags[narch_flags].cpusubtype &
~CPU_SUBTYPE_MASK) &&
strcmp(arch_flags[j].name,
arch_flags[narch_flags].name) == 0)
break;
}
if(j == narch_flags)
narch_flags++;
}
i++;
}
else{
for(j = 1; argv[i][j] != '\0'; j++){
switch(argv[i][j]){
#ifdef NMEDIT
case 'p':
pflag = 1;
break;
#else /* !defined(NMEDIT) */
case 'S':
Sflag = 1;
strip_all = 0;
break;
case 'X':
Xflag = 1;
strip_all = 0;
break;
case 'x':
xflag = 1;
strip_all = 0;
break;
case 'i':
iflag = 1;
break;
case 'u':
uflag = 1;
strip_all = 0;
break;
case 'r':
rflag = 1;
strip_all = 0;
break;
case 'n':
nflag = 1;
strip_all = 0;
break;
#endif /* !defined(NMEDIT) */
case 'A':
Aflag = 1;
#ifndef NMEDIT
strip_all = 0;
#endif /* !defined(NMEDIT) */
break;
#ifndef NMEDIT
case 'c':
cflag = 1;
strip_all = 0;
break;
case 'v':
vflag = 1;
break;
case 'l':
lflag = 1;
break;
#endif /* NMEDIT */
default:
error("unrecognized option: %s", argv[i]);
usage();
}
}
}
}
else
files_specified++;
}
if(args_left == 0)
files_specified += argc - (i + 1);
if(files_specified > 1 && output_file != NULL){
error("-o <filename> can only be used when one file is specified");
usage();
}
if(sfile){
setup_symbol_list(sfile, &save_symbols, &nsave_symbols);
}
#ifdef NMEDIT
else{
if(Rfile == NULL && pflag == 0){
error("-s <filename>, -R <filename> or -p argument required");
usage();
}
}
#endif /* NMEDIT */
if(Rfile){
setup_symbol_list(Rfile, &remove_symbols, &nremove_symbols);
if(sfile){
for(j = 0; j < nremove_symbols ; j++){
sp = bsearch(remove_symbols[j].name,
save_symbols, nsave_symbols,
sizeof(struct symbol_list),
(int (*)(const void *, const void *))
symbol_list_bsearch);
if(sp != NULL){
error("symbol name: %s is listed in both -s %s and -R "
"%s files (can't be both saved and removed)",
remove_symbols[j].name, sfile, Rfile);
}
}
if(errors)
exit(EXIT_FAILURE);
}
}
/* the default when no -arch flags is present is to strip all archs */
if(narch_flags == 0)
all_archs = TRUE;
#ifndef NMEDIT
if(dfile){
setup_debug_filenames(dfile);
}
#endif /* !defined(NMEDIT) */
files_specified = 0;
args_left = 1;
for (i = 1; i < argc; i++) {
if(args_left && argv[i][0] == '-'){
if(argv[i][1] == '\0')
args_left = 0;
else if(strcmp(argv[i], "-o") == 0 ||
strcmp(argv[i], "-s") == 0 ||
strcmp(argv[i], "-R") == 0 ||
#ifndef NMEDIT
strcmp(argv[i], "-d") == 0 ||
#endif /* !defined(NMEDIT) */
strcmp(argv[i], "-arch") == 0)
i++;
}
else{
char resolved_path[PATH_MAX + 1];
if(realpath(argv[i], resolved_path) == NULL)
strip_file(argv[i], arch_flags, narch_flags, all_archs);
else
strip_file(resolved_path, arch_flags,narch_flags,all_archs);
files_specified++;
}
}
if(files_specified == 0)
fatal("no files specified");
if(errors)
return(EXIT_FAILURE);
else
return(EXIT_SUCCESS);
}
static
void
usage(
void)
{
#ifndef NMEDIT
fprintf(stderr, "Usage: %s [-AnuSXx] [-] [-d filename] [-s filename] "
"[-R filename] [-o output] file [...] \n", progname);
#else /* defined(NMEDIT) */
fprintf(stderr, "Usage: %s -s filename [-R filename] [-p] [-A] [-] "
"[-o output] file [...] \n",
progname);
#endif /* NMEDIT */
exit(EXIT_FAILURE);
}
static
void
strip_file(
char *input_file,
struct arch_flag *arch_flags,
uint32_t narch_flags,
enum bool all_archs)
{
struct ofile *ofile;
struct arch *archs;
uint32_t narchs;
struct stat stat_buf;
uint32_t previous_errors;
enum bool unix_standard_mode;
int cwd_fd;
char *rename_file;
#ifndef NMEDIT
char *p;
#endif
archs = NULL;
narchs = 0;
previous_errors = errors;
errors = 0;
/* breakout the file for processing */
ofile = breakout(input_file, &archs, &narchs, FALSE);
if(errors)
return;
/* checkout the file for symbol table replacement processing */
checkout(archs, narchs);
/* process the symbols in the input file */
strip_arch(archs, narchs, arch_flags, narch_flags, all_archs);
if(errors){
free_archs(archs, narchs);
ofile_unmap(ofile);
return;
}
/* create the output file */
if(stat(input_file, &stat_buf) == -1)
system_error("can't stat input file: %s", input_file);
if(output_file != NULL){
writeout(archs, narchs, output_file, stat_buf.st_mode & 0777,
TRUE, FALSE, FALSE, NULL);
}
else{
unix_standard_mode = get_unix_standard_mode();
rename_file = NULL;
cwd_fd = -1;
#ifdef NMEDIT
output_file = makestr(input_file, ".nmedit", NULL);
#else /* !defined(NMEDIT) */
/*
* In UNIX standard conformance mode we are not allowed to replace
* a file that is not writeable.
*/
if(unix_standard_mode == TRUE &&
access(input_file, W_OK) == -1){
system_error("file: %s is not writable", input_file);
goto strip_file_return;
}
output_file = makestr(input_file, ".strip", NULL);
/*
* The UNIX standard conformance test suite expects files of
* MAXPATHLEN to work.
*/
if(strlen(output_file) >= MAXPATHLEN){
/*
* If there is a directory path in the name try to change
* the current working directory to that path.
*/
if((p = rindex(output_file, '/')) != NULL){
if((cwd_fd = open(".", O_RDONLY, 0)) == -1){
system_error("can't open current working directory");
goto strip_file_return;
}
*p = '\0';
if(chdir(output_file) == -1){
system_error("can't change current working directory "
"to: %s", output_file);
goto strip_file_return;
}
p = rindex(input_file, '/');
rename_file = makestr(p + 1, NULL);
}
/*
* Create what might be a short enough name.
*/
free(output_file);
output_file = makestr("strip.XXXXXX", NULL);
output_file = mktemp(output_file);
}
#endif /* NMEDIT */
writeout(archs, narchs, output_file, stat_buf.st_mode & 0777,
TRUE, FALSE, FALSE, NULL);
if(rename_file != NULL){
if(rename(output_file, rename_file) == -1)
system_error("can't move temporary file: %s to file: %s",
output_file, rename_file);
free(rename_file);
}
else{
if(rename(output_file, input_file) == -1)
system_error("can't move temporary file: %s to input "
"file: %s", output_file, input_file);
}
free(output_file);
output_file = NULL;
/*
* If we changed the current working directory change back to
* the previous working directory.
*/
if(cwd_fd != -1){
if(fchdir(cwd_fd) == -1)
system_error("can't change back to previous working "
"directory");
if(close(cwd_fd) == -1)
system_error("can't close previous working directory");
}
}
#ifndef NMEDIT
strip_file_return:
#endif /* !defined(NMEDIT) */
/* clean-up data structures */
free_archs(archs, narchs);
ofile_unmap(ofile);
errors += previous_errors;
}
static
void
strip_arch(
struct arch *archs,
uint32_t narchs,
struct arch_flag *arch_flags,
uint32_t narch_flags,
enum bool all_archs)
{
uint32_t i, j, k, offset, size, missing_syms;
cpu_type_t cputype;
cpu_subtype_t cpusubtype;
struct arch_flag host_arch_flag;
enum bool arch_process, any_processing, *arch_flag_processed, family;
const struct arch_flag *family_arch_flag;
/*
* Using the specified arch_flags process specified objects for those
* architecures.
*/
any_processing = FALSE;
arch_flag_processed = NULL;
if(narch_flags != 0)
arch_flag_processed = allocate(narch_flags * sizeof(enum bool));
memset(arch_flag_processed, '\0', narch_flags * sizeof(enum bool));
for(i = 0; i < narchs; i++){
/*
* Determine the architecture (cputype and cpusubtype) of arch[i]
*/
cputype = 0;
cpusubtype = 0;
if(archs[i].type == OFILE_ARCHIVE){
for(j = 0; j < archs[i].nmembers; j++){
if(archs[i].members[j].type == OFILE_Mach_O){
cputype = archs[i].members[j].object->mh_cputype;
cpusubtype = archs[i].members[j].object->mh_cpusubtype;
break;
}
}
}
else if(archs[i].type == OFILE_Mach_O){
cputype = archs[i].object->mh_cputype;
cpusubtype = archs[i].object->mh_cpusubtype;
}
else if(archs[i].fat_arch != NULL){
cputype = archs[i].fat_arch->cputype;
cpusubtype = archs[i].fat_arch->cpusubtype;
}
arch_process = FALSE;
if(all_archs == TRUE){
arch_process = TRUE;
}
else if(narch_flags != 0){
family = FALSE;
if(narch_flags == 1){
family_arch_flag =
get_arch_family_from_cputype(arch_flags[0].cputype);
if(family_arch_flag != NULL)
family = (enum bool)
((family_arch_flag->cpusubtype & ~CPU_SUBTYPE_MASK) ==
(arch_flags[0].cpusubtype & ~CPU_SUBTYPE_MASK));
}
for(j = 0; j < narch_flags; j++){
if(arch_flags[j].cputype == cputype &&
((arch_flags[j].cpusubtype & ~CPU_SUBTYPE_MASK) ==
(cpusubtype & ~CPU_SUBTYPE_MASK) ||
family == TRUE)){
arch_process = TRUE;
arch_flag_processed[j] = TRUE;
break;
}
}
}
else{
(void)get_arch_from_host(&host_arch_flag, NULL);
if(host_arch_flag.cputype == cputype &&
(host_arch_flag.cpusubtype & ~CPU_SUBTYPE_MASK) ==
(cpusubtype & ~CPU_SUBTYPE_MASK))
arch_process = TRUE;
}
if(narchs != 1 && arch_process == FALSE)
continue;
any_processing = TRUE;
/*
* Now this arch[i] has been selected to be processed so process it
* according to its type.
*/
if(archs[i].type == OFILE_ARCHIVE){
for(j = 0; j < archs[i].nmembers; j++){
if(archs[i].members[j].type == OFILE_Mach_O){
strip_object(archs + i, archs[i].members + j,
archs[i].members[j].object);
}
}
missing_syms = 0;
if(iflag == 0){
for(k = 0; k < nsave_symbols; k++){
if(save_symbols[k].seen == FALSE){
if(missing_syms == 0){
error_arch(archs + i, NULL, "symbols names "
"listed in: %s not in: ", sfile);
missing_syms = 1;
}
fprintf(stderr, "%s\n", save_symbols[k].name);
}
}
}
for(k = 0; k < nsave_symbols; k++){
save_symbols[k].seen = FALSE;
}
missing_syms = 0;
if(iflag == 0){
for(k = 0; k < nremove_symbols; k++){
if(remove_symbols[k].seen == FALSE){
if(missing_syms == 0){
error_arch(archs + i, NULL, "symbols names "
"listed in: %s not defined in: ",
Rfile);
missing_syms = 1;
}
fprintf(stderr, "%s\n", remove_symbols[k].name);
}
}
}
for(k = 0; k < nremove_symbols; k++){
remove_symbols[k].seen = FALSE;
}
/*
* Reset the library offsets and size.
*/
offset = 0;
for(j = 0; j < archs[i].nmembers; j++){
archs[i].members[j].offset = offset;
size = 0;
if(archs[i].members[j].member_long_name == TRUE){
size = rnd(archs[i].members[j].member_name_size, 8) +
(rnd(sizeof(struct ar_hdr), 8) -
sizeof(struct ar_hdr));
archs[i].toc_long_name = TRUE;
}
if(archs[i].members[j].object != NULL){
size +=
rnd(archs[i].members[j].object->object_size -
archs[i].members[j].object->input_sym_info_size +
archs[i].members[j].object->output_sym_info_size,
8);
sprintf(archs[i].members[j].ar_hdr->ar_size, "%-*ld",
(int)sizeof(archs[i].members[j].ar_hdr->ar_size),
(long)(size));
/*
* This has to be done by hand because sprintf puts a
* null at the end of the buffer.
*/
memcpy(archs[i].members[j].ar_hdr->ar_fmag, ARFMAG,
(int)sizeof(archs[i].members[j].ar_hdr->ar_fmag));
}
else{
size += archs[i].members[j].unknown_size;
}
offset += sizeof(struct ar_hdr) + size;
}
archs[i].library_size = offset;
}
else if(archs[i].type == OFILE_Mach_O){
strip_object(archs + i, NULL, archs[i].object);
}
else {
warning_arch(archs + i, NULL, "can't process non-object and "
"non-archive file: ");
return;
}
}
if(all_archs == FALSE && narch_flags != 0){
for(i = 0; i < narch_flags; i++){
if(arch_flag_processed[i] == FALSE)
error("file: %s does not contain architecture: %s",
archs[0].file_name, arch_flags[i].name);
}
free(arch_flag_processed);
}
if(any_processing == FALSE)
fatal("no processing done on input file: %s (specify a -arch flag)",
archs[0].file_name);
}
static
void
strip_object(
struct arch *arch,
struct member *member,
struct object *object)
{
enum byte_sex host_byte_sex;
uint32_t offset;
struct dylib_table_of_contents *tocs;
uint32_t ntoc;
struct dylib_module *mods;
struct dylib_module_64 *mods64;
uint32_t nmodtab;
struct dylib_reference *refs;
uint32_t nextrefsyms;
uint32_t i, j;
struct load_command *lc;
struct segment_command *sg;
struct segment_command_64 *sg64;
struct section *s;
struct section_64 *s64;
struct relocation_info *relocs;
struct scattered_relocation_info *sreloc;
int32_t missing_reloc_symbols;
uint32_t stride, section_type, nitems;
char *contents;
uint32_t dyld_info_start;
uint32_t dyld_info_end;
#ifndef NMEDIT
uint32_t flags;
uint32_t k;
#endif
uint32_t ncmds;
host_byte_sex = get_host_byte_sex();
/* Don't do anything to stub dylibs which have no load commands. */
if(object->mh_filetype == MH_DYLIB_STUB){
if((object->mh != NULL && object->mh->ncmds == 0) ||
(object->mh64 != NULL && object->mh64->ncmds == 0)){
return;
}
}
if(object->mh_filetype == MH_DSYM)
fatal_arch(arch, member, "can't process dSYM companion file: ");
if(object->st == NULL || object->st->nsyms == 0){
warning_arch(arch, member, "input object file stripped: ");
return;
}
nsyms = object->st->nsyms;
if(object->mh != NULL){
symbols = (struct nlist *)
(object->object_addr + object->st->symoff);
if(object->object_byte_sex != host_byte_sex)
swap_nlist(symbols, nsyms, host_byte_sex);
symbols64 = NULL;
}
else{
symbols = NULL;
symbols64 = (struct nlist_64 *)
(object->object_addr + object->st->symoff);
if(object->object_byte_sex != host_byte_sex)
swap_nlist_64(symbols64, nsyms, host_byte_sex);