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https://github.com/topjohnwu/ndk-busybox.git
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modutils-24: code shrink
function old new delta helper_create_alloced_section - 117 +117 print_load_map 474 450 -24 bb_init_module_24 4615 4545 -70 obj_create_alloced_section 131 30 -101 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 0/3 up/down: 117/-195) Total: -78 bytes
This commit is contained in:
Denis Vlasenko
parent
4acdb46ff1
commit
49325969e7
@ -2135,7 +2135,7 @@ obj_insert_section_load_order(struct obj_file *f, struct obj_section *sec)
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*p = sec;
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}
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static struct obj_section *obj_create_alloced_section(struct obj_file *f,
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static struct obj_section *helper_create_alloced_section(struct obj_file *f,
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const char *name,
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unsigned long align,
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unsigned long size)
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@ -2155,8 +2155,18 @@ static struct obj_section *obj_create_alloced_section(struct obj_file *f,
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if (size)
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sec->contents = xzalloc(size);
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obj_insert_section_load_order(f, sec);
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return sec;
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}
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static struct obj_section *obj_create_alloced_section(struct obj_file *f,
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const char *name,
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unsigned long align,
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unsigned long size)
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{
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struct obj_section *sec;
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sec = helper_create_alloced_section(f, name, align, size);
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obj_insert_section_load_order(f, sec);
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return sec;
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}
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@ -2165,21 +2175,9 @@ static struct obj_section *obj_create_alloced_section_first(struct obj_file *f,
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unsigned long align,
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unsigned long size)
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{
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int newidx = f->header.e_shnum++;
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struct obj_section *sec;
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f->sections = xrealloc_vector(f->sections, 2, newidx);
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f->sections[newidx] = sec = arch_new_section();
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sec->header.sh_type = SHT_PROGBITS;
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sec->header.sh_flags = SHF_WRITE | SHF_ALLOC;
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sec->header.sh_size = size;
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sec->header.sh_addralign = align;
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sec->name = name;
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sec->idx = newidx;
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if (size)
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sec->contents = xzalloc(size);
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sec = helper_create_alloced_section(f, name, align, size);
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sec->load_next = f->load_order;
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f->load_order = sec;
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if (f->load_order_search_start == &f->load_order)
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@ -2202,15 +2200,16 @@ static void *obj_extend_section(struct obj_section *sec, unsigned long more)
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/* Conditionally add the symbols from the given symbol set to the
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new module. */
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static int
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add_symbols_from( struct obj_file *f,
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int idx, struct new_module_symbol *syms, size_t nsyms)
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static int add_symbols_from(struct obj_file *f,
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int idx,
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struct new_module_symbol *syms,
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size_t nsyms)
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{
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struct new_module_symbol *s;
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size_t i;
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int used = 0;
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#ifdef SYMBOL_PREFIX
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char *name_buf = 0;
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char *name_buf = NULL;
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size_t name_alloced_size = 0;
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#endif
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#if ENABLE_FEATURE_CHECK_TAINTED_MODULE
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@ -2900,7 +2899,7 @@ static void obj_check_undefineds(struct obj_file *f)
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for (i = 0; i < HASH_BUCKETS; ++i) {
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struct obj_symbol *sym;
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for (sym = f->symtab[i]; sym; sym = sym->next)
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for (sym = f->symtab[i]; sym; sym = sym->next) {
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if (sym->secidx == SHN_UNDEF) {
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if (ELF_ST_BIND(sym->info) == STB_WEAK) {
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sym->secidx = SHN_ABS;
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@ -2910,6 +2909,7 @@ static void obj_check_undefineds(struct obj_file *f)
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bb_error_msg_and_die("unresolved symbol %s", sym->name);
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}
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}
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}
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}
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}
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@ -3074,7 +3074,7 @@ static int obj_relocate(struct obj_file *f, ElfW(Addr) base)
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ElfW(Addr) value = 0;
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struct obj_symbol *intsym = NULL;
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unsigned long symndx;
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ElfW(Sym) * extsym = 0;
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ElfW(Sym) *extsym = NULL;
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const char *errmsg;
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/* Attempt to find a value to use for this relocation. */
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@ -3634,7 +3634,8 @@ add_ksymoops_symbols(struct obj_file *f, const char *filename,
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version = get_module_version(f, str); /* -1 if not found */
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name = xasprintf("%s%s_O%s_M%0*lX_V%d",
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symprefix, m_name, absolute_filename,
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(int)(2 * sizeof(statbuf.st_mtime)), statbuf.st_mtime,
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(int)(2 * sizeof(statbuf.st_mtime)),
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(long)statbuf.st_mtime,
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version);
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sym = obj_add_symbol(f, name, -1,
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ELF_ST_INFO(STB_GLOBAL, STT_NOTYPE),
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@ -3645,7 +3646,6 @@ add_ksymoops_symbols(struct obj_file *f, const char *filename,
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free(absolute_filename);
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#ifdef _NOT_SUPPORTED_
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/* record where the persistent data is going, same address as previous symbol */
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if (f->persist) {
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name = xasprintf("%s%s_P%s",
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symprefix, m_name, f->persist);
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@ -3656,7 +3656,6 @@ add_ksymoops_symbols(struct obj_file *f, const char *filename,
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}
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#endif
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/* tag the desired sections if size is non-zero */
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for (i = 0; i < ARRAY_SIZE(section_names); ++i) {
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sec = obj_find_section(f, section_names[i]);
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if (sec && sec->header.sh_size) {
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@ -3678,11 +3677,11 @@ static void print_load_map(struct obj_file *f)
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struct obj_section *sec;
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#if ENABLE_FEATURE_INSMOD_LOAD_MAP_FULL
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struct obj_symbol **all, **p;
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int i, nsyms, *loaded;
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int i, nsyms;
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char *loaded; /* array of booleans */
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struct obj_symbol *sym;
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#endif
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/* Report on the section layout. */
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printf("Sections: Size %-*s Align\n",
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(int) (2 * sizeof(void *)), "Address");
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@ -3704,14 +3703,12 @@ static void print_load_map(struct obj_file *f)
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}
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#if ENABLE_FEATURE_INSMOD_LOAD_MAP_FULL
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/* Quick reference which section indices are loaded. */
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i = f->header.e_shnum;
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loaded = alloca(sizeof(int) * i);
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loaded = alloca(i * sizeof(loaded[0]));
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while (--i >= 0)
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loaded[i] = ((f->sections[i]->header.sh_flags & SHF_ALLOC) != 0);
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/* Collect the symbols we'll be listing. */
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for (nsyms = i = 0; i < HASH_BUCKETS; ++i)
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for (sym = f->symtab[i]; sym; sym = sym->next)
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if (sym->secidx <= SHN_HIRESERVE
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@ -3720,7 +3717,7 @@ static void print_load_map(struct obj_file *f)
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++nsyms;
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}
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all = alloca(nsyms * sizeof(struct obj_symbol *));
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all = alloca(nsyms * sizeof(all[0]));
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for (i = 0, p = all; i < HASH_BUCKETS; ++i)
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for (sym = f->symtab[i]; sym; sym = sym->next)
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@ -3760,7 +3757,7 @@ static void print_load_map(struct obj_file *f)
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}
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if (ELF_ST_BIND(sym->info) == STB_LOCAL)
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type = tolower(type);
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type |= 0x20; /* tolower. safe for '?' too */
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printf("%0*lx %c %s\n", (int) (2 * sizeof(void *)), value,
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type, sym->name);
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@ -3799,10 +3796,7 @@ int FAST_FUNC bb_init_module_24(const char *m_filename, const char *options)
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f = obj_load(fp, LOADBITS);
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if (get_modinfo_value(f, "kernel_version") == NULL)
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m_has_modinfo = 0;
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else
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m_has_modinfo = 1;
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m_has_modinfo = (get_modinfo_value(f, "kernel_version") != NULL);
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#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
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/* Version correspondence? */
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@ -3846,13 +3840,12 @@ int FAST_FUNC bb_init_module_24(const char *m_filename, const char *options)
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add_kernel_symbols(f);
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/* Allocate common symbols, symbol tables, and string tables. */
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new_create_this_module(f, m_name);
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obj_check_undefineds(f);
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obj_allocate_commons(f);
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check_tainted_module(f, m_name);
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/* done with the module name, on to the optional var=value arguments */
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/* Done with the module name, on to the optional var=value arguments */
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new_process_module_arguments(f, options);
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arch_create_got(f);
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