2 * Copyright (c) 2007 S.Sam Arun Raj
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
41 ELFTC_VCSID("$Id: size.c 3183 2015-04-10 16:18:42Z emaste $");
44 #define ELF_ALIGN(val,x) (((val)+(x)-1) & ~((x)-1))
45 #define SIZE_VERSION_STRING "size 1.0"
65 static uint64_t bss_size, data_size, text_size, total_size;
66 static uint64_t bss_size_total, data_size_total, text_size_total;
67 static int show_totals;
68 static int size_option;
69 static enum radix_style radix = RADIX_DECIMAL;
70 static enum output_style style = STYLE_BERKELEY;
71 static const char *default_args[2] = { "a.out", NULL };
85 static struct option size_longopts[] = {
86 { "format", required_argument, &size_option, OPT_FORMAT },
87 { "help", no_argument, NULL, 'h' },
88 { "radix", required_argument, &size_option, OPT_RADIX },
89 { "totals", no_argument, NULL, 't' },
90 { "version", no_argument, NULL, 'V' },
94 static void berkeley_calc(GElf_Shdr *);
95 static void berkeley_footer(const char *, const char *, const char *);
96 static void berkeley_header(void);
97 static void berkeley_totals(void);
98 static int handle_core(char const *, Elf *elf, GElf_Ehdr *);
99 static void handle_core_note(Elf *, GElf_Ehdr *, GElf_Phdr *, char **);
100 static int handle_elf(char const *);
101 static void handle_phdr(Elf *, GElf_Ehdr *, GElf_Phdr *, uint32_t,
103 static void show_version(void);
104 static void sysv_header(const char *, Elf_Arhdr *);
105 static void sysv_footer(void);
106 static void sysv_calc(Elf *, GElf_Ehdr *, GElf_Shdr *);
107 static void usage(void);
108 static void tbl_new(int);
109 static void tbl_print(const char *, int);
110 static void tbl_print_num(uint64_t, enum radix_style, int);
111 static void tbl_append(void);
112 static void tbl_flush(void);
115 * size utility using elf(3) and gelf(3) API to list section sizes and
116 * total in elf files. Supports only elf files (core dumps in elf
117 * included) that can be opened by libelf, other formats are not supported.
120 main(int argc, char **argv)
123 const char **files, *fn;
127 if (elf_version(EV_CURRENT) == EV_NONE)
128 errx(EXIT_FAILURE, "ELF library initialization failed: %s",
131 while ((ch = getopt_long(argc, argv, "ABVdhotx", size_longopts,
138 style = STYLE_BERKELEY;
144 radix = RADIX_DECIMAL;
156 switch (size_option) {
158 if (*optarg == 's' || *optarg == 'S')
160 else if (*optarg == 'b' || *optarg == 'B')
161 style = STYLE_BERKELEY;
163 warnx("unrecognized format \"%s\".",
169 r = strtol(optarg, NULL, 10);
173 radix = RADIX_DECIMAL;
177 warnx("unsupported radix \"%s\".",
183 err(EXIT_FAILURE, "Error in option handling.");
196 files = (argc == 0) ? default_args : (void *) argv;
198 while ((fn = *files) != NULL) {
201 warnx(rc == RETURN_NOINPUT ?
202 "'%s': No such file" :
203 "%s: File format not recognized", fn);
206 if (style == STYLE_BERKELEY) {
215 xlatetom(Elf *elf, GElf_Ehdr *elfhdr, void *_src, void *_dst,
216 Elf_Type type, size_t size)
222 src.d_version = elfhdr->e_version;
225 dst.d_version = elfhdr->e_version;
227 return (gelf_xlatetom(elf, &dst, &src, elfhdr->e_ident[EI_DATA]));
230 #define NOTE_OFFSET_32(nhdr, namesz, offset) \
231 ((char *)nhdr + sizeof(Elf32_Nhdr) + \
232 ELF_ALIGN((int32_t)namesz, 4) + offset)
234 #define NOTE_OFFSET_64(nhdr, namesz, offset) \
235 ((char *)nhdr + sizeof(Elf32_Nhdr) + \
236 ELF_ALIGN((int32_t)namesz, 8) + offset)
238 #define PID32(nhdr, namesz, offset) \
239 (pid_t)*((int *)((uintptr_t)NOTE_OFFSET_32(nhdr, \
242 #define PID64(nhdr, namesz, offset) \
243 (pid_t)*((int *)((uintptr_t)NOTE_OFFSET_64(nhdr, \
246 #define NEXT_NOTE(elfhdr, descsz, namesz, offset) do { \
247 if (elfhdr->e_ident[EI_CLASS] == ELFCLASS32) { \
248 offset += ELF_ALIGN((int32_t)descsz, 4) + \
249 sizeof(Elf32_Nhdr) + \
250 ELF_ALIGN((int32_t)namesz, 4); \
252 offset += ELF_ALIGN((int32_t)descsz, 8) + \
253 sizeof(Elf32_Nhdr) + \
254 ELF_ALIGN((int32_t)namesz, 8); \
259 * Parse individual note entries inside a PT_NOTE segment.
262 handle_core_note(Elf *elf, GElf_Ehdr *elfhdr, GElf_Phdr *phdr,
270 Elf32_Nhdr *nhdr, nhdr_l;
271 static int reg_pseudo = 0, reg2_pseudo = 0 /*, regxfp_pseudo = 0*/;
272 char buf[BUF_SIZE], *data, *name;
274 if (elf == NULL || elfhdr == NULL || phdr == NULL)
277 data = elf_rawfile(elf, &max_size);
278 offset = phdr->p_offset;
279 while (data != NULL && offset < phdr->p_offset + phdr->p_filesz) {
280 nhdr = (Elf32_Nhdr *)(uintptr_t)((char*)data + offset);
281 memset(&nhdr_l, 0, sizeof(Elf32_Nhdr));
282 if (!xlatetom(elf, elfhdr, &nhdr->n_type, &nhdr_l.n_type,
283 ELF_T_WORD, sizeof(Elf32_Word)) ||
284 !xlatetom(elf, elfhdr, &nhdr->n_descsz, &nhdr_l.n_descsz,
285 ELF_T_WORD, sizeof(Elf32_Word)) ||
286 !xlatetom(elf, elfhdr, &nhdr->n_namesz, &nhdr_l.n_namesz,
287 ELF_T_WORD, sizeof(Elf32_Word)))
290 name = (char *)((char *)nhdr + sizeof(Elf32_Nhdr));
291 switch (nhdr_l.n_type) {
294 if (elfhdr->e_ident[EI_OSABI] == ELFOSABI_FREEBSD &&
295 nhdr_l.n_namesz == 0x8 &&
296 !strcmp(name,"FreeBSD")) {
297 if (elfhdr->e_ident[EI_CLASS] == ELFCLASS32) {
298 raw_size = (uint64_t)*((uint32_t *)
301 nhdr_l.n_namesz, 4) + 8));
302 ver = (uintptr_t)NOTE_OFFSET_32(nhdr,
304 if (*((int *)ver) == 1)
306 nhdr_l.n_namesz, 24);
308 raw_size = *((uint64_t *)(uintptr_t)
309 (name + ELF_ALIGN((int32_t)
310 nhdr_l.n_namesz, 8) + 16));
311 ver = (uintptr_t)NOTE_OFFSET_64(nhdr,
313 if (*((int *)ver) == 1)
315 nhdr_l.n_namesz, 40);
317 xlatetom(elf, elfhdr, &raw_size, &raw_size,
318 ELF_T_WORD, sizeof(uint64_t));
319 xlatetom(elf, elfhdr, &pid, &pid, ELF_T_WORD,
323 if (raw_size != 0 && style == STYLE_SYSV) {
324 (void) snprintf(buf, BUF_SIZE, "%s/%d",
328 tbl_print_num(raw_size, radix, 1);
329 tbl_print_num(0, radix, 2);
332 tbl_print(".reg", 0);
333 tbl_print_num(raw_size, radix, 1);
334 tbl_print_num(0, radix, 2);
336 text_size_total += raw_size;
338 text_size_total += raw_size;
342 case NT_FPREGSET: /* same as NT_PRFPREG */
343 if (style == STYLE_SYSV) {
344 (void) snprintf(buf, BUF_SIZE,
345 "%s/%d", ".reg2", pid);
348 tbl_print_num(nhdr_l.n_descsz, radix, 1);
349 tbl_print_num(0, radix, 2);
352 tbl_print(".reg2", 0);
353 tbl_print_num(nhdr_l.n_descsz, radix,
355 tbl_print_num(0, radix, 2);
357 text_size_total += nhdr_l.n_descsz;
359 text_size_total += nhdr_l.n_descsz;
364 if (style == STYLE_SYSV) {
366 tbl_print(".auxv", 0);
367 tbl_print_num(nhdr_l.n_descsz, radix, 1);
368 tbl_print_num(0, radix, 2);
369 text_size_total += nhdr_l.n_descsz;
373 if (style == STYLE_SYSV) {
374 (void) snprintf(buf, BUF_SIZE, "%s/%d",
378 tbl_print_num(nhdr_l.n_descsz, radix, 1);
379 tbl_print_num(0, radix, 2);
380 if (!regxfp_pseudo) {
382 tbl_print(".reg-xfp", 0);
383 tbl_print_num(nhdr_l.n_descsz, radix,
385 tbl_print_num(0, radix, 2);
387 text_size_total += nhdr_l.n_descsz;
389 text_size_total += nhdr_l.n_descsz;
396 if (nhdr_l.n_descsz == 0x78 &&
397 !strcmp(name,"FreeBSD")) {
398 *cmd_line = strdup(NOTE_OFFSET_64(nhdr,
399 nhdr_l.n_namesz, 33));
401 } else if (nhdr_l.n_descsz == 0x6c &&
402 !strcmp(name,"FreeBSD")) {
403 *cmd_line = strdup(NOTE_OFFSET_32(nhdr,
404 nhdr_l.n_namesz, 25));
406 /* Strip any trailing spaces */
407 if (*cmd_line != NULL) {
410 s = *cmd_line + strlen(*cmd_line);
411 while (s > *cmd_line) {
412 if (*(s-1) != 0x20) break;
426 NEXT_NOTE(elfhdr, nhdr_l.n_descsz, nhdr_l.n_namesz, offset);
431 * Handles program headers except for PT_NOTE, when sysv output stlye is
432 * choosen, prints out the segment name and length. For berkely output
433 * style only PT_LOAD segments are handled, and text,
434 * data, bss size is calculated for them.
437 handle_phdr(Elf *elf, GElf_Ehdr *elfhdr, GElf_Phdr *phdr,
438 uint32_t idx, const char *name)
444 if (elf == NULL || elfhdr == NULL || phdr == NULL)
448 split = (phdr->p_memsz > 0) && (phdr->p_filesz > 0) &&
449 (phdr->p_memsz > phdr->p_filesz);
451 if (style == STYLE_SYSV) {
452 (void) snprintf(buf, BUF_SIZE,
453 "%s%d%s", name, idx, (split ? "a" : ""));
456 tbl_print_num(phdr->p_filesz, radix, 1);
457 tbl_print_num(phdr->p_vaddr, radix, 2);
458 text_size_total += phdr->p_filesz;
460 size = phdr->p_memsz - phdr->p_filesz;
461 addr = phdr->p_vaddr + phdr->p_filesz;
462 (void) snprintf(buf, BUF_SIZE, "%s%d%s", name,
464 text_size_total += phdr->p_memsz - phdr->p_filesz;
467 tbl_print_num(size, radix, 1);
468 tbl_print_num(addr, radix, 2);
471 if (phdr->p_type != PT_LOAD)
473 if ((phdr->p_flags & PF_W) && !(phdr->p_flags & PF_X)) {
474 data_size += phdr->p_filesz;
476 data_size += phdr->p_memsz - phdr->p_filesz;
478 text_size += phdr->p_filesz;
480 text_size += phdr->p_memsz - phdr->p_filesz;
486 * Given a core dump file, this function maps program headers to segments.
489 handle_core(char const *name, Elf *elf, GElf_Ehdr *elfhdr)
494 const char *seg_name;
496 if (name == NULL || elf == NULL || elfhdr == NULL)
497 return (RETURN_DATAERR);
498 if (elfhdr->e_shnum != 0 || elfhdr->e_type != ET_CORE)
499 return (RETURN_DATAERR);
501 seg_name = core_cmdline = NULL;
502 if (style == STYLE_SYSV)
503 sysv_header(name, NULL);
507 for (i = 0; i < elfhdr->e_phnum; i++) {
508 if (gelf_getphdr(elf, i, &phdr) != NULL) {
509 if (phdr.p_type == PT_NOTE) {
510 handle_phdr(elf, elfhdr, &phdr, i, "note");
511 handle_core_note(elf, elfhdr, &phdr,
514 switch(phdr.p_type) {
522 seg_name = "dynamic";
533 case PT_GNU_EH_FRAME:
534 seg_name = "eh_frame_hdr";
540 seg_name = "segment";
542 handle_phdr(elf, elfhdr, &phdr, i, seg_name);
547 if (style == STYLE_BERKELEY) {
548 if (core_cmdline != NULL) {
549 berkeley_footer(core_cmdline, name,
550 "core file invoked as");
552 berkeley_footer(core_cmdline, name, "core file");
556 if (core_cmdline != NULL) {
557 (void) printf(" (core file invoked as %s)\n\n",
560 (void) printf(" (core file)\n\n");
568 * Given an elf object,ar(1) filename, and based on the output style
569 * and radix format the various sections and their length will be printed
570 * or the size of the text, data, bss sections will be printed out.
573 handle_elf(char const *name)
584 return (RETURN_NOINPUT);
586 if ((fd = open(name, O_RDONLY, 0)) < 0)
587 return (RETURN_NOINPUT);
589 elf_cmd = ELF_C_READ;
590 elf1 = elf_begin(fd, elf_cmd, NULL);
591 while ((elf = elf_begin(fd, elf_cmd, elf1)) != NULL) {
592 arhdr = elf_getarhdr(elf);
593 if (elf_kind(elf) == ELF_K_NONE && arhdr == NULL) {
595 (void) elf_end(elf1);
597 return (RETURN_DATAERR);
599 if (elf_kind(elf) != ELF_K_ELF ||
600 (gelf_getehdr(elf, &elfhdr) == NULL)) {
601 elf_cmd = elf_next(elf);
603 warnx("%s: File format not recognized",
607 /* Core dumps are handled separately */
608 if (elfhdr.e_shnum == 0 && elfhdr.e_type == ET_CORE) {
609 exit_code = handle_core(name, elf, &elfhdr);
611 (void) elf_end(elf1);
616 if (style == STYLE_BERKELEY) {
618 while ((scn = elf_nextscn(elf, scn)) != NULL) {
619 if (gelf_getshdr(scn, &shdr) != NULL)
620 berkeley_calc(&shdr);
623 sysv_header(name, arhdr);
625 while ((scn = elf_nextscn(elf, scn)) != NULL) {
626 if (gelf_getshdr(scn, &shdr) != NULL)
627 sysv_calc(elf, &elfhdr, &shdr);
630 if (style == STYLE_BERKELEY) {
632 berkeley_footer(name, arhdr->ar_name,
635 berkeley_footer(name, NULL, "ex");
641 elf_cmd = elf_next(elf);
644 (void) elf_end(elf1);
650 * Sysv formatting helper functions.
653 sysv_header(const char *name, Elf_Arhdr *arhdr)
658 (void) printf("%s (ex %s):\n", arhdr->ar_name, name);
660 (void) printf("%s :\n", name);
663 tbl_print("section", 0);
664 tbl_print("size", 1);
665 tbl_print("addr", 2);
669 sysv_calc(Elf *elf, GElf_Ehdr *elfhdr, GElf_Shdr *shdr)
673 section_name = elf_strptr(elf, elfhdr->e_shstrndx,
674 (size_t) shdr->sh_name);
675 if ((shdr->sh_type == SHT_SYMTAB ||
676 shdr->sh_type == SHT_STRTAB || shdr->sh_type == SHT_RELA ||
677 shdr->sh_type == SHT_REL) && shdr->sh_addr == 0)
680 tbl_print(section_name, 0);
681 tbl_print_num(shdr->sh_size, radix, 1);
682 tbl_print_num(shdr->sh_addr, radix, 2);
683 text_size_total += shdr->sh_size;
690 tbl_print("Total", 0);
691 tbl_print_num(text_size_total, radix, 1);
697 * berkeley style output formatting helper functions.
700 berkeley_header(void)
704 text_size = data_size = bss_size = 0;
708 tbl_print("text", 0);
709 tbl_print("data", 1);
711 if (radix == RADIX_OCTAL)
716 tbl_print("filename", 5);
722 berkeley_calc(GElf_Shdr *shdr)
725 if (!(shdr->sh_flags & SHF_ALLOC))
727 if ((shdr->sh_flags & SHF_ALLOC) &&
728 ((shdr->sh_flags & SHF_EXECINSTR) ||
729 !(shdr->sh_flags & SHF_WRITE)))
730 text_size += shdr->sh_size;
731 else if ((shdr->sh_flags & SHF_ALLOC) &&
732 (shdr->sh_flags & SHF_WRITE) &&
733 (shdr->sh_type != SHT_NOBITS))
734 data_size += shdr->sh_size;
736 bss_size += shdr->sh_size;
741 berkeley_totals(void)
743 long unsigned int grand_total;
745 grand_total = text_size_total + data_size_total + bss_size_total;
747 tbl_print_num(text_size_total, radix, 0);
748 tbl_print_num(data_size_total, radix, 1);
749 tbl_print_num(bss_size_total, radix, 2);
750 if (radix == RADIX_OCTAL)
751 tbl_print_num(grand_total, RADIX_OCTAL, 3);
753 tbl_print_num(grand_total, RADIX_DECIMAL, 3);
754 tbl_print_num(grand_total, RADIX_HEX, 4);
758 berkeley_footer(const char *name, const char *ar_name, const char *msg)
762 total_size = text_size + data_size + bss_size;
764 text_size_total += text_size;
765 bss_size_total += bss_size;
766 data_size_total += data_size;
770 tbl_print_num(text_size, radix, 0);
771 tbl_print_num(data_size, radix, 1);
772 tbl_print_num(bss_size, radix, 2);
773 if (radix == RADIX_OCTAL)
774 tbl_print_num(total_size, RADIX_OCTAL, 3);
776 tbl_print_num(total_size, RADIX_DECIMAL, 3);
777 tbl_print_num(total_size, RADIX_HEX, 4);
778 if (ar_name != NULL && name != NULL)
779 (void) snprintf(buf, BUF_SIZE, "%s (%s %s)", ar_name, msg,
781 else if (ar_name != NULL && name == NULL)
782 (void) snprintf(buf, BUF_SIZE, "%s (%s)", ar_name, msg);
784 (void) snprintf(buf, BUF_SIZE, "%s", name);
795 if ((tb = calloc(1, sizeof(*tb))) == NULL)
796 err(EXIT_FAILURE, "calloc");
797 if ((tb->tbl = calloc(col, sizeof(*tb->tbl))) == NULL)
798 err(EXIT_FAILURE, "calloc");
799 if ((tb->width = calloc(col, sizeof(*tb->width))) == NULL)
800 err(EXIT_FAILURE, "calloc");
806 tbl_print(const char *s, int col)
810 assert(tb != NULL && tb->col > 0 && tb->row > 0 && col < tb->col);
811 assert(s != NULL && tb->tbl[col][tb->row - 1] == NULL);
812 if ((tb->tbl[col][tb->row - 1] = strdup(s)) == NULL)
813 err(EXIT_FAILURE, "strdup");
815 if (len > tb->width[col])
816 tb->width[col] = len;
820 tbl_print_num(uint64_t num, enum radix_style rad, int col)
824 (void) snprintf(buf, BUF_SIZE, (rad == RADIX_DECIMAL ? "%ju" :
825 ((rad == RADIX_OCTAL) ? "0%jo" : "0x%jx")), (uintmax_t) num);
834 assert(tb != NULL && tb->col > 0);
836 for (i = 0; i < tb->col; i++) {
837 tb->tbl[i] = realloc(tb->tbl[i], sizeof(*tb->tbl[i]) * tb->row);
838 if (tb->tbl[i] == NULL)
839 err(EXIT_FAILURE, "realloc");
840 tb->tbl[i][tb->row - 1] = NULL;
854 for (i = 0; i < tb->row; i++) {
855 if (style == STYLE_BERKELEY)
857 for (j = 0; j < tb->col; j++) {
858 str = (tb->tbl[j][i] != NULL ? tb->tbl[j][i] : "");
859 if (style == STYLE_SYSV && j == 0)
860 printf("%-*s", tb->width[j], str);
861 else if (style == STYLE_BERKELEY && j == tb->col - 1)
864 printf("%*s", tb->width[j], str);
872 for (i = 0; i < tb->col; i++) {
873 for (j = 0; j < tb->row; j++) {
885 #define USAGE_MESSAGE "\
886 Usage: %s [options] file ...\n\
887 Display sizes of ELF sections.\n\n\
889 --format=format Display output in specified format. Supported\n\
890 values are `berkeley' and `sysv'.\n\
891 --help Display this help message and exit.\n\
892 --radix=radix Display numeric values in the specified radix.\n\
893 Supported values are: 8, 10 and 16.\n\
894 --totals Show cumulative totals of section sizes.\n\
895 --version Display a version identifier and exit.\n\
896 -A Equivalent to `--format=sysv'.\n\
897 -B Equivalent to `--format=berkeley'.\n\
898 -V Equivalent to `--version'.\n\
899 -d Equivalent to `--radix=10'.\n\
900 -h Same as option --help.\n\
901 -o Equivalent to `--radix=8'.\n\
902 -t Equivalent to option --totals.\n\
903 -x Equivalent to `--radix=16'.\n"
908 (void) fprintf(stderr, USAGE_MESSAGE, ELFTC_GETPROGNAME());
915 (void) printf("%s (%s)\n", ELFTC_GETPROGNAME(), elftc_version());