contrib/elftoolchain/size/size.c

   1 /*-
   2  * Copyright (c) 2007 S.Sam Arun Raj
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   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.
  13  *
  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
  24  * SUCH DAMAGE.
  25  */
  26
  27 #include <assert.h>
  28 #include <capsicum_helpers.h>
  29 #include <err.h>
  30 #include <fcntl.h>
  31 #include <gelf.h>
  32 #include <getopt.h>
  33 #include <libelftc.h>
  34 #include <stdint.h>
  35 #include <stdio.h>
  36 #include <stdlib.h>
  37 #include <string.h>
  38 #include <unistd.h>
  39
  40 #include <libcasper.h>
  41 #include <casper/cap_fileargs.h>
  42
  43 #include "_elftc.h"
  44
  45 ELFTC_VCSID("$Id: size.c 3458 2016-05-09 15:01:25Z emaste $");
  46
  47 #define BUF_SIZE                        1024
  48 #define ELF_ALIGN(val,x) (((val)+(x)-1) & ~((x)-1))
  49 #define SIZE_VERSION_STRING             "size 1.0"
  50
  51 enum return_code {
  52         RETURN_OK,
  53         RETURN_DATAERR,
  54         RETURN_USAGE
  55 };
  56
  57 enum output_style {
  58         STYLE_BERKELEY,
  59         STYLE_SYSV
  60 };
  61
  62 enum radix_style {
  63         RADIX_OCTAL,
  64         RADIX_DECIMAL,
  65         RADIX_HEX
  66 };
  67
  68 static uint64_t bss_size, data_size, text_size, total_size;
  69 static uint64_t bss_size_total, data_size_total, text_size_total;
  70 static int show_totals;
  71 static int size_option;
  72 static enum radix_style radix = RADIX_DECIMAL;
  73 static enum output_style style = STYLE_BERKELEY;
  74
  75 static struct {
  76         int row;
  77         int col;
  78         int *width;
  79         char ***tbl;
  80 } *tb;
  81
  82 enum {
  83         OPT_FORMAT,
  84         OPT_RADIX
  85 };
  86
  87 static struct option size_longopts[] = {
  88         { "format",     required_argument, &size_option, OPT_FORMAT },
  89         { "help",       no_argument,    NULL,   'h' },
  90         { "radix",      required_argument, &size_option, OPT_RADIX },
  91         { "totals",     no_argument,    NULL,   't' },
  92         { "version",    no_argument,    NULL,   'V' },
  93         { NULL, 0, NULL, 0 }
  94 };
  95
  96 static void     berkeley_calc(GElf_Shdr *);
  97 static void     berkeley_footer(const char *, const char *, const char *);
  98 static void     berkeley_header(void);
  99 static void     berkeley_totals(void);
 100 static int      handle_core(char const *, Elf *elf, GElf_Ehdr *);
 101 static void     handle_core_note(Elf *, GElf_Ehdr *, GElf_Phdr *, char **);
 102 static int      handle_elf(int, char const *);
 103 static void     handle_phdr(Elf *, GElf_Ehdr *, GElf_Phdr *, uint32_t,
 104                     const char *);
 105 static void     show_version(void);
 106 static void     sysv_header(const char *, Elf_Arhdr *);
 107 static void     sysv_footer(void);
 108 static void     sysv_calc(Elf *, GElf_Ehdr *, GElf_Shdr *);
 109 static void     usage(void);
 110 static void     tbl_new(int);
 111 static void     tbl_print(const char *, int);
 112 static void     tbl_print_num(uint64_t, enum radix_style, int);
 113 static void     tbl_append(void);
 114 static void     tbl_flush(void);
 115
 116 /*
 117  * size utility using elf(3) and gelf(3) API to list section sizes and
 118  * total in elf files. Supports only elf files (core dumps in elf
 119  * included) that can be opened by libelf, other formats are not supported.
 120  */
 121 int
 122 main(int argc, char **argv)
 123 {
 124         cap_rights_t rights;
 125         fileargs_t *fa;
 126         int ch, fd, r, rc;
 127         const char *fn;
 128         char *defaultfn;
 129
 130         rc = RETURN_OK;
 131
 132         if (elf_version(EV_CURRENT) == EV_NONE)
 133                 errx(EXIT_FAILURE, "ELF library initialization failed: %s",
 134                     elf_errmsg(-1));
 135
 136         while ((ch = getopt_long(argc, argv, "ABVdhotx", size_longopts,
 137             NULL)) != -1)
 138                 switch((char)ch) {
 139                 case 'A':
 140                         style = STYLE_SYSV;
 141                         break;
 142                 case 'B':
 143                         style = STYLE_BERKELEY;
 144                         break;
 145                 case 'V':
 146                         show_version();
 147                         break;
 148                 case 'd':
 149                         radix = RADIX_DECIMAL;
 150                         break;
 151                 case 'o':
 152                         radix = RADIX_OCTAL;
 153                         break;
 154                 case 't':
 155                         show_totals = 1;
 156                         break;
 157                 case 'x':
 158                         radix = RADIX_HEX;
 159                         break;
 160                 case 0:
 161                         switch (size_option) {
 162                         case OPT_FORMAT:
 163                                 if (*optarg == 's' || *optarg == 'S')
 164                                         style = STYLE_SYSV;
 165                                 else if (*optarg == 'b' || *optarg == 'B')
 166                                         style = STYLE_BERKELEY;
 167                                 else {
 168                                         warnx("unrecognized format \"%s\".",
 169                                               optarg);
 170                                         usage();
 171                                 }
 172                                 break;
 173                         case OPT_RADIX:
 174                                 r = strtol(optarg, NULL, 10);
 175                                 if (r == 8)
 176                                         radix = RADIX_OCTAL;
 177                                 else if (r == 10)
 178                                         radix = RADIX_DECIMAL;
 179                                 else if (r == 16)
 180                                         radix = RADIX_HEX;
 181                                 else {
 182                                         warnx("unsupported radix \"%s\".",
 183                                               optarg);
 184                                         usage();
 185                                 }
 186                                 break;
 187                         default:
 188                                 err(EXIT_FAILURE, "Error in option handling.");
 189                                 /*NOTREACHED*/
 190                         }
 191                         break;
 192                 case 'h':
 193                 case '?':
 194                 default:
 195                         usage();
 196                         /* NOTREACHED */
 197                 }
 198         argc -= optind;
 199         argv += optind;
 200
 201         if (argc == 0) {
 202                 defaultfn = strdup("a.out");
 203                 if (defaultfn == NULL)
 204                         err(EXIT_FAILURE, "strdup");
 205                 argc = 1;
 206                 argv = &defaultfn;
 207         } else {
 208                 defaultfn = NULL;
 209         }
 210
 211         cap_rights_init(&rights, CAP_FSTAT, CAP_MMAP_R);
 212         fa = fileargs_init(argc, argv, O_RDONLY, 0, &rights, FA_OPEN);
 213         if (fa == NULL)
 214                 err(EXIT_FAILURE, "failed to initialize fileargs");
 215
 216         caph_cache_catpages();
 217         if (caph_limit_stdio() < 0)
 218                 err(EXIT_FAILURE, "failed to limit stdio rights");
 219         if (caph_enter_casper() < 0)
 220                 err(EXIT_FAILURE, "failed to enter capability mode");
 221
 222         for (; argc > 0; argc--, argv++) {
 223                 fn = argv[0];
 224                 fd = fileargs_open(fa, fn);
 225                 if (fd < 0) {
 226                         warn("%s: Failed to open", fn);
 227                         continue;
 228                 }
 229                 rc = handle_elf(fd, fn);
 230                 if (rc != RETURN_OK)
 231                         warnx("%s: File format not recognized", fn);
 232         }
 233         if (style == STYLE_BERKELEY) {
 234                 if (show_totals)
 235                         berkeley_totals();
 236                 tbl_flush();
 237         }
 238         fileargs_free(fa);
 239         free(defaultfn);
 240         return (rc);
 241 }
 242
 243 static Elf_Data *
 244 xlatetom(Elf *elf, GElf_Ehdr *elfhdr, void *_src, void *_dst,
 245     Elf_Type type, size_t size)
 246 {
 247         Elf_Data src, dst;
 248
 249         src.d_buf = _src;
 250         src.d_type = type;
 251         src.d_version = elfhdr->e_version;
 252         src.d_size = size;
 253         dst.d_buf = _dst;
 254         dst.d_version = elfhdr->e_version;
 255         dst.d_size = size;
 256         return (gelf_xlatetom(elf, &dst, &src, elfhdr->e_ident[EI_DATA]));
 257 }
 258
 259 #define NOTE_OFFSET_32(nhdr, namesz, offset)                    \
 260         ((char *)nhdr + sizeof(Elf32_Nhdr) +                    \
 261             ELF_ALIGN((int32_t)namesz, 4) + offset)
 262
 263 #define NOTE_OFFSET_64(nhdr, namesz, offset)                    \
 264         ((char *)nhdr + sizeof(Elf32_Nhdr) +                    \
 265             ELF_ALIGN((int32_t)namesz, 8) + offset)
 266
 267 #define PID32(nhdr, namesz, offset)                             \
 268         (pid_t)*((int *)((uintptr_t)NOTE_OFFSET_32(nhdr,        \
 269             namesz, offset)));
 270
 271 #define PID64(nhdr, namesz, offset)                             \
 272         (pid_t)*((int *)((uintptr_t)NOTE_OFFSET_64(nhdr,        \
 273             namesz, offset)));
 274
 275 #define NEXT_NOTE(elfhdr, descsz, namesz, offset) do {          \
 276         if (elfhdr->e_ident[EI_CLASS] == ELFCLASS32) {          \
 277                 offset += ELF_ALIGN((int32_t)descsz, 4) +       \
 278                     sizeof(Elf32_Nhdr) +                        \
 279                         ELF_ALIGN((int32_t)namesz, 4);          \
 280         } else {                                                \
 281                 offset += ELF_ALIGN((int32_t)descsz, 8) +       \
 282                     sizeof(Elf32_Nhdr) +                        \
 283                         ELF_ALIGN((int32_t)namesz, 8);          \
 284         }                                                       \
 285 } while (0)
 286
 287 /*
 288  * Parse individual note entries inside a PT_NOTE segment.
 289  */
 290 static void
 291 handle_core_note(Elf *elf, GElf_Ehdr *elfhdr, GElf_Phdr *phdr,
 292     char **cmd_line)
 293 {
 294         size_t max_size, segment_end;
 295         uint64_t raw_size;
 296         GElf_Off offset;
 297         static pid_t pid;
 298         uintptr_t ver;
 299         Elf32_Nhdr *nhdr, nhdr_l;
 300         static int reg_pseudo = 0, reg2_pseudo = 0 /*, regxfp_pseudo = 0*/;
 301         char buf[BUF_SIZE], *data, *name;
 302
 303         if (elf == NULL || elfhdr == NULL || phdr == NULL)
 304                 return;
 305
 306         data = elf_rawfile(elf, &max_size);
 307         offset = phdr->p_offset;
 308         if (offset >= max_size || phdr->p_filesz > max_size - offset) {
 309                 warnx("invalid PHDR offset");
 310                 return;
 311         }
 312         segment_end = phdr->p_offset + phdr->p_filesz;
 313
 314         while (data != NULL && offset + sizeof(Elf32_Nhdr) < segment_end) {
 315                 nhdr = (Elf32_Nhdr *)(uintptr_t)((char*)data + offset);
 316                 memset(&nhdr_l, 0, sizeof(Elf32_Nhdr));
 317                 if (!xlatetom(elf, elfhdr, &nhdr->n_type, &nhdr_l.n_type,
 318                         ELF_T_WORD, sizeof(Elf32_Word)) ||
 319                     !xlatetom(elf, elfhdr, &nhdr->n_descsz, &nhdr_l.n_descsz,
 320                         ELF_T_WORD, sizeof(Elf32_Word)) ||
 321                     !xlatetom(elf, elfhdr, &nhdr->n_namesz, &nhdr_l.n_namesz,
 322                         ELF_T_WORD, sizeof(Elf32_Word)))
 323                         break;
 324
 325                 if (offset + sizeof(Elf32_Nhdr) +
 326                     ELF_ALIGN(nhdr_l.n_namesz, 4) +
 327                     ELF_ALIGN(nhdr_l.n_descsz, 4) >= segment_end) {
 328                         warnx("invalid note header");
 329                         return;
 330                 }
 331
 332                 name = (char *)((char *)nhdr + sizeof(Elf32_Nhdr));
 333                 switch (nhdr_l.n_type) {
 334                 case NT_PRSTATUS: {
 335                         raw_size = 0;
 336                         if (elfhdr->e_ident[EI_OSABI] == ELFOSABI_FREEBSD &&
 337                             nhdr_l.n_namesz == 0x8 &&
 338                             !strcmp(name,"FreeBSD")) {
 339                                 if (elfhdr->e_ident[EI_CLASS] == ELFCLASS32) {
 340                                         raw_size = (uint64_t)*((uint32_t *)
 341                                             (uintptr_t)(name +
 342                                                 ELF_ALIGN((int32_t)
 343                                                 nhdr_l.n_namesz, 4) + 8));
 344                                         ver = (uintptr_t)NOTE_OFFSET_32(nhdr,
 345                                             nhdr_l.n_namesz,0);
 346                                         if (*((int *)ver) == 1)
 347                                                 pid = PID32(nhdr,
 348                                                     nhdr_l.n_namesz, 24);
 349                                 } else {
 350                                         raw_size = *((uint64_t *)(uintptr_t)
 351                                             (name + ELF_ALIGN((int32_t)
 352                                                 nhdr_l.n_namesz, 8) + 16));
 353                                         ver = (uintptr_t)NOTE_OFFSET_64(nhdr,
 354                                             nhdr_l.n_namesz,0);
 355                                         if (*((int *)ver) == 1)
 356                                                 pid = PID64(nhdr,
 357                                                     nhdr_l.n_namesz, 40);
 358                                 }
 359                                 xlatetom(elf, elfhdr, &raw_size, &raw_size,
 360                                     ELF_T_WORD, sizeof(uint64_t));
 361                                 xlatetom(elf, elfhdr, &pid, &pid, ELF_T_WORD,
 362                                     sizeof(pid_t));
 363                         }
 364
 365                         if (raw_size != 0 && style == STYLE_SYSV) {
 366                                 (void) snprintf(buf, BUF_SIZE, "%s/%d",
 367                                     ".reg", pid);
 368                                 tbl_append();
 369                                 tbl_print(buf, 0);
 370                                 tbl_print_num(raw_size, radix, 1);
 371                                 tbl_print_num(0, radix, 2);
 372                                 if (!reg_pseudo) {
 373                                         tbl_append();
 374                                         tbl_print(".reg", 0);
 375                                         tbl_print_num(raw_size, radix, 1);
 376                                         tbl_print_num(0, radix, 2);
 377                                         reg_pseudo = 1;
 378                                         text_size_total += raw_size;
 379                                 }
 380                                 text_size_total += raw_size;
 381                         }
 382                 }
 383                 break;
 384                 case NT_FPREGSET:       /* same as NT_PRFPREG */
 385                         if (style == STYLE_SYSV) {
 386                                 (void) snprintf(buf, BUF_SIZE,
 387                                     "%s/%d", ".reg2", pid);
 388                                 tbl_append();
 389                                 tbl_print(buf, 0);
 390                                 tbl_print_num(nhdr_l.n_descsz, radix, 1);
 391                                 tbl_print_num(0, radix, 2);
 392                                 if (!reg2_pseudo) {
 393                                         tbl_append();
 394                                         tbl_print(".reg2", 0);
 395                                         tbl_print_num(nhdr_l.n_descsz, radix,
 396                                             1);
 397                                         tbl_print_num(0, radix, 2);
 398                                         reg2_pseudo = 1;
 399                                         text_size_total += nhdr_l.n_descsz;
 400                                 }
 401                                 text_size_total += nhdr_l.n_descsz;
 402                         }
 403                         break;
 404 #if 0
 405                 case NT_AUXV:
 406                         if (style == STYLE_SYSV) {
 407                                 tbl_append();
 408                                 tbl_print(".auxv", 0);
 409                                 tbl_print_num(nhdr_l.n_descsz, radix, 1);
 410                                 tbl_print_num(0, radix, 2);
 411                                 text_size_total += nhdr_l.n_descsz;
 412                         }
 413                         break;
 414                 case NT_PRXFPREG:
 415                         if (style == STYLE_SYSV) {
 416                                 (void) snprintf(buf, BUF_SIZE, "%s/%d",
 417                                     ".reg-xfp", pid);
 418                                 tbl_append();
 419                                 tbl_print(buf, 0);
 420                                 tbl_print_num(nhdr_l.n_descsz, radix, 1);
 421                                 tbl_print_num(0, radix, 2);
 422                                 if (!regxfp_pseudo) {
 423                                         tbl_append();
 424                                         tbl_print(".reg-xfp", 0);
 425                                         tbl_print_num(nhdr_l.n_descsz, radix,
 426                                             1);
 427                                         tbl_print_num(0, radix, 2);
 428                                         regxfp_pseudo = 1;
 429                                         text_size_total += nhdr_l.n_descsz;
 430                                 }
 431                                 text_size_total += nhdr_l.n_descsz;
 432                         }
 433                         break;
 434                 case NT_PSINFO:
 435 #endif
 436                 case NT_PRPSINFO: {
 437                         /* FreeBSD 64-bit */
 438                         if (nhdr_l.n_descsz == 0x78 &&
 439                                 !strcmp(name,"FreeBSD")) {
 440                                 *cmd_line = strdup(NOTE_OFFSET_64(nhdr,
 441                                     nhdr_l.n_namesz, 33));
 442                         /* FreeBSD 32-bit */
 443                         } else if (nhdr_l.n_descsz == 0x6c &&
 444                                 !strcmp(name,"FreeBSD")) {
 445                                 *cmd_line = strdup(NOTE_OFFSET_32(nhdr,
 446                                     nhdr_l.n_namesz, 25));
 447                         }
 448                         /* Strip any trailing spaces */
 449                         if (*cmd_line != NULL) {
 450                                 char *s;
 451
 452                                 s = *cmd_line + strlen(*cmd_line);
 453                                 while (s > *cmd_line) {
 454                                         if (*(s-1) != 0x20) break;
 455                                         s--;
 456                                 }
 457                                 *s = 0;
 458                         }
 459                         break;
 460                 }
 461 #if 0
 462                 case NT_PSTATUS:
 463                 case NT_LWPSTATUS:
 464 #endif
 465                 default:
 466                         break;
 467                 }
 468                 NEXT_NOTE(elfhdr, nhdr_l.n_descsz, nhdr_l.n_namesz, offset);
 469         }
 470 }
 471
 472 /*
 473  * Handles program headers except for PT_NOTE, when sysv output style is
 474  * chosen, prints out the segment name and length. For berkely output
 475  * style only PT_LOAD segments are handled, and text,
 476  * data, bss size is calculated for them.
 477  */
 478 static void
 479 handle_phdr(Elf *elf, GElf_Ehdr *elfhdr, GElf_Phdr *phdr,
 480     uint32_t idx, const char *name)
 481 {
 482         uint64_t addr, size;
 483         int split;
 484         char buf[BUF_SIZE];
 485
 486         if (elf == NULL || elfhdr == NULL || phdr == NULL)
 487                 return;
 488
 489         split = (phdr->p_memsz > 0) &&  (phdr->p_filesz > 0) &&
 490             (phdr->p_memsz > phdr->p_filesz);
 491
 492         if (style == STYLE_SYSV) {
 493                 (void) snprintf(buf, BUF_SIZE,
 494                     "%s%d%s", name, idx, (split ? "a" : ""));
 495                 tbl_append();
 496                 tbl_print(buf, 0);
 497                 tbl_print_num(phdr->p_filesz, radix, 1);
 498                 tbl_print_num(phdr->p_vaddr, radix, 2);
 499                 text_size_total += phdr->p_filesz;
 500                 if (split) {
 501                         size = phdr->p_memsz - phdr->p_filesz;
 502                         addr = phdr->p_vaddr + phdr->p_filesz;
 503                         (void) snprintf(buf, BUF_SIZE, "%s%d%s", name,
 504                             idx, "b");
 505                         text_size_total += phdr->p_memsz - phdr->p_filesz;
 506                         tbl_append();
 507                         tbl_print(buf, 0);
 508                         tbl_print_num(size, radix, 1);
 509                         tbl_print_num(addr, radix, 2);
 510                 }
 511         } else {
 512                 if (phdr->p_type != PT_LOAD)
 513                         return;
 514                 if ((phdr->p_flags & PF_W) && !(phdr->p_flags & PF_X)) {
 515                         data_size += phdr->p_filesz;
 516                         if (split)
 517                                 data_size += phdr->p_memsz - phdr->p_filesz;
 518                 } else {
 519                         text_size += phdr->p_filesz;
 520                         if (split)
 521                                 text_size += phdr->p_memsz - phdr->p_filesz;
 522                 }
 523         }
 524 }
 525
 526 /*
 527  * Given a core dump file, this function maps program headers to segments.
 528  */
 529 static int
 530 handle_core(char const *name, Elf *elf, GElf_Ehdr *elfhdr)
 531 {
 532         GElf_Phdr phdr;
 533         uint32_t i;
 534         char *core_cmdline;
 535         const char *seg_name;
 536
 537         if (name == NULL || elf == NULL || elfhdr == NULL)
 538                 return (RETURN_DATAERR);
 539         if  (elfhdr->e_shnum != 0 || elfhdr->e_type != ET_CORE)
 540                 return (RETURN_DATAERR);
 541
 542         seg_name = core_cmdline = NULL;
 543         if (style == STYLE_SYSV)
 544                 sysv_header(name, NULL);
 545         else
 546                 berkeley_header();
 547
 548         for (i = 0; i < elfhdr->e_phnum; i++) {
 549                 if (gelf_getphdr(elf, i, &phdr) != NULL) {
 550                         if (phdr.p_type == PT_NOTE) {
 551                                 handle_phdr(elf, elfhdr, &phdr, i, "note");
 552                                 handle_core_note(elf, elfhdr, &phdr,
 553                                     &core_cmdline);
 554                         } else {
 555                                 switch(phdr.p_type) {
 556                                 case PT_NULL:
 557                                         seg_name = "null";
 558                                         break;
 559                                 case PT_LOAD:
 560                                         seg_name = "load";
 561                                         break;
 562                                 case PT_DYNAMIC:
 563                                         seg_name = "dynamic";
 564                                         break;
 565                                 case PT_INTERP:
 566                                         seg_name = "interp";
 567                                         break;
 568                                 case PT_SHLIB:
 569                                         seg_name = "shlib";
 570                                         break;
 571                                 case PT_PHDR:
 572                                         seg_name = "phdr";
 573                                         break;
 574                                 case PT_GNU_EH_FRAME:
 575                                         seg_name = "eh_frame_hdr";
 576                                         break;
 577                                 case PT_GNU_STACK:
 578                                         seg_name = "stack";
 579                                         break;
 580                                 default:
 581                                         seg_name = "segment";
 582                                 }
 583                                 handle_phdr(elf, elfhdr, &phdr, i, seg_name);
 584                         }
 585                 }
 586         }
 587
 588         if (style == STYLE_BERKELEY) {
 589                 if (core_cmdline != NULL) {
 590                         berkeley_footer(core_cmdline, name,
 591                             "core file invoked as");
 592                 } else {
 593                         berkeley_footer(core_cmdline, name, "core file");
 594                 }
 595         } else {
 596                 sysv_footer();
 597                 if (core_cmdline != NULL) {
 598                         (void) printf(" (core file invoked as %s)\n\n",
 599                             core_cmdline);
 600                 } else {
 601                         (void) printf(" (core file)\n\n");
 602                 }
 603         }
 604         free(core_cmdline);
 605         return (RETURN_OK);
 606 }
 607
 608 /*
 609  * Given an elf object,ar(1) filename, and based on the output style
 610  * and radix format the various sections and their length will be printed
 611  * or the size of the text, data, bss sections will be printed out.
 612  */
 613 static int
 614 handle_elf(int fd, const char *name)
 615 {
 616         GElf_Ehdr elfhdr;
 617         GElf_Shdr shdr;
 618         Elf *elf, *elf1;
 619         Elf_Arhdr *arhdr;
 620         Elf_Scn *scn;
 621         Elf_Cmd elf_cmd;
 622         int exit_code;
 623
 624         elf_cmd = ELF_C_READ;
 625         elf1 = elf_begin(fd, elf_cmd, NULL);
 626         while ((elf = elf_begin(fd, elf_cmd, elf1)) != NULL) {
 627                 arhdr = elf_getarhdr(elf);
 628                 if (elf_kind(elf) == ELF_K_NONE && arhdr == NULL) {
 629                         (void) elf_end(elf);
 630                         (void) elf_end(elf1);
 631                         (void) close(fd);
 632                         return (RETURN_DATAERR);
 633                 }
 634                 if (elf_kind(elf) != ELF_K_ELF ||
 635                     (gelf_getehdr(elf, &elfhdr) == NULL)) {
 636                         elf_cmd = elf_next(elf);
 637                         (void) elf_end(elf);
 638                         warnx("%s: File format not recognized",
 639                             arhdr != NULL ? arhdr->ar_name : name);
 640                         continue;
 641                 }
 642                 /* Core dumps are handled separately */
 643                 if (elfhdr.e_shnum == 0 && elfhdr.e_type == ET_CORE) {
 644                         exit_code = handle_core(name, elf, &elfhdr);
 645                         (void) elf_end(elf);
 646                         (void) elf_end(elf1);
 647                         (void) close(fd);
 648                         return (exit_code);
 649                 } else {
 650                         scn = NULL;
 651                         if (style == STYLE_BERKELEY) {
 652                                 berkeley_header();
 653                                 while ((scn = elf_nextscn(elf, scn)) != NULL) {
 654                                         if (gelf_getshdr(scn, &shdr) != NULL)
 655                                                 berkeley_calc(&shdr);
 656                                 }
 657                         } else {
 658                                 sysv_header(name, arhdr);
 659                                 scn = NULL;
 660                                 while ((scn = elf_nextscn(elf, scn)) != NULL) {
 661                                         if (gelf_getshdr(scn, &shdr) != NULL)
 662                                                 sysv_calc(elf, &elfhdr, &shdr);
 663                                 }
 664                         }
 665                         if (style == STYLE_BERKELEY) {
 666                                 if (arhdr != NULL) {
 667                                         berkeley_footer(name, arhdr->ar_name,
 668                                             "ex");
 669                                 } else {
 670                                         berkeley_footer(name, NULL, "ex");
 671                                 }
 672                         } else {
 673                                 sysv_footer();
 674                         }
 675                 }
 676                 elf_cmd = elf_next(elf);
 677                 (void) elf_end(elf);
 678         }
 679         (void) elf_end(elf1);
 680         (void) close(fd);
 681         return (RETURN_OK);
 682 }
 683
 684 /*
 685  * Sysv formatting helper functions.
 686  */
 687 static void
 688 sysv_header(const char *name, Elf_Arhdr *arhdr)
 689 {
 690
 691         text_size_total = 0;
 692         if (arhdr != NULL)
 693                 (void) printf("%s   (ex %s):\n", arhdr->ar_name, name);
 694         else
 695                 (void) printf("%s  :\n", name);
 696         tbl_new(3);
 697         tbl_append();
 698         tbl_print("section", 0);
 699         tbl_print("size", 1);
 700         tbl_print("addr", 2);
 701 }
 702
 703 static void
 704 sysv_calc(Elf *elf, GElf_Ehdr *elfhdr, GElf_Shdr *shdr)
 705 {
 706         char *section_name;
 707
 708         section_name = elf_strptr(elf, elfhdr->e_shstrndx,
 709             (size_t) shdr->sh_name);
 710         if ((shdr->sh_type == SHT_SYMTAB ||
 711             shdr->sh_type == SHT_STRTAB || shdr->sh_type == SHT_RELA ||
 712             shdr->sh_type == SHT_REL) && shdr->sh_addr == 0)
 713                 return;
 714         tbl_append();
 715         tbl_print(section_name, 0);
 716         tbl_print_num(shdr->sh_size, radix, 1);
 717         tbl_print_num(shdr->sh_addr, radix, 2);
 718         text_size_total += shdr->sh_size;
 719 }
 720
 721 static void
 722 sysv_footer(void)
 723 {
 724         tbl_append();
 725         tbl_print("Total", 0);
 726         tbl_print_num(text_size_total, radix, 1);
 727         tbl_flush();
 728         putchar('\n');
 729 }
 730
 731 /*
 732  * berkeley style output formatting helper functions.
 733  */
 734 static void
 735 berkeley_header(void)
 736 {
 737         static int printed;
 738
 739         text_size = data_size = bss_size = 0;
 740         if (!printed) {
 741                 tbl_new(6);
 742                 tbl_append();
 743                 tbl_print("text", 0);
 744                 tbl_print("data", 1);
 745                 tbl_print("bss", 2);
 746                 if (radix == RADIX_OCTAL)
 747                         tbl_print("oct", 3);
 748                 else
 749                         tbl_print("dec", 3);
 750                 tbl_print("hex", 4);
 751                 tbl_print("filename", 5);
 752                 printed = 1;
 753         }
 754 }
 755
 756 static void
 757 berkeley_calc(GElf_Shdr *shdr)
 758 {
 759         if (shdr != NULL) {
 760                 if (!(shdr->sh_flags & SHF_ALLOC))
 761                         return;
 762                 if ((shdr->sh_flags & SHF_ALLOC) &&
 763                     ((shdr->sh_flags & SHF_EXECINSTR) ||
 764                     !(shdr->sh_flags & SHF_WRITE)))
 765                         text_size += shdr->sh_size;
 766                 else if ((shdr->sh_flags & SHF_ALLOC) &&
 767                     (shdr->sh_flags & SHF_WRITE) &&
 768                     (shdr->sh_type != SHT_NOBITS))
 769                         data_size += shdr->sh_size;
 770                 else
 771                         bss_size += shdr->sh_size;
 772         }
 773 }
 774
 775 static void
 776 berkeley_totals(void)
 777 {
 778         uint64_t grand_total;
 779
 780         grand_total = text_size_total + data_size_total + bss_size_total;
 781         tbl_append();
 782         tbl_print_num(text_size_total, radix, 0);
 783         tbl_print_num(data_size_total, radix, 1);
 784         tbl_print_num(bss_size_total, radix, 2);
 785         if (radix == RADIX_OCTAL)
 786                 tbl_print_num(grand_total, RADIX_OCTAL, 3);
 787         else
 788                 tbl_print_num(grand_total, RADIX_DECIMAL, 3);
 789         tbl_print_num(grand_total, RADIX_HEX, 4);
 790 }
 791
 792 static void
 793 berkeley_footer(const char *name, const char *ar_name, const char *msg)
 794 {
 795         char buf[BUF_SIZE];
 796
 797         total_size = text_size + data_size + bss_size;
 798         if (show_totals) {
 799                 text_size_total += text_size;
 800                 bss_size_total += bss_size;
 801                 data_size_total += data_size;
 802         }
 803
 804         tbl_append();
 805         tbl_print_num(text_size, radix, 0);
 806         tbl_print_num(data_size, radix, 1);
 807         tbl_print_num(bss_size, radix, 2);
 808         if (radix == RADIX_OCTAL)
 809                 tbl_print_num(total_size, RADIX_OCTAL, 3);
 810         else
 811                 tbl_print_num(total_size, RADIX_DECIMAL, 3);
 812         tbl_print_num(total_size, RADIX_HEX, 4);
 813         if (ar_name != NULL && name != NULL)
 814                 (void) snprintf(buf, BUF_SIZE, "%s (%s %s)", ar_name, msg,
 815                     name);
 816         else if (ar_name != NULL && name == NULL)
 817                 (void) snprintf(buf, BUF_SIZE, "%s (%s)", ar_name, msg);
 818         else
 819                 (void) snprintf(buf, BUF_SIZE, "%s", name);
 820         tbl_print(buf, 5);
 821 }
 822
 823
 824 static void
 825 tbl_new(int col)
 826 {
 827
 828         assert(tb == NULL);
 829         assert(col > 0);
 830         if ((tb = calloc(1, sizeof(*tb))) == NULL)
 831                 err(EXIT_FAILURE, "calloc");
 832         if ((tb->tbl = calloc(col, sizeof(*tb->tbl))) == NULL)
 833                 err(EXIT_FAILURE, "calloc");
 834         if ((tb->width = calloc(col, sizeof(*tb->width))) == NULL)
 835                 err(EXIT_FAILURE, "calloc");
 836         tb->col = col;
 837         tb->row = 0;
 838 }
 839
 840 static void
 841 tbl_print(const char *s, int col)
 842 {
 843         int len;
 844
 845         assert(tb != NULL && tb->col > 0 && tb->row > 0 && col < tb->col);
 846         assert(s != NULL && tb->tbl[col][tb->row - 1] == NULL);
 847         if ((tb->tbl[col][tb->row - 1] = strdup(s)) == NULL)
 848                 err(EXIT_FAILURE, "strdup");
 849         len = strlen(s);
 850         if (len > tb->width[col])
 851                 tb->width[col] = len;
 852 }
 853
 854 static void
 855 tbl_print_num(uint64_t num, enum radix_style rad, int col)
 856 {
 857         char buf[BUF_SIZE];
 858
 859         (void) snprintf(buf, BUF_SIZE, (rad == RADIX_DECIMAL ? "%ju" :
 860             ((rad == RADIX_OCTAL) ? "0%jo" : "0x%jx")), (uintmax_t) num);
 861         tbl_print(buf, col);
 862 }
 863
 864 static void
 865 tbl_append(void)
 866 {
 867         int i;
 868
 869         assert(tb != NULL && tb->col > 0);
 870         tb->row++;
 871         for (i = 0; i < tb->col; i++) {
 872                 tb->tbl[i] = realloc(tb->tbl[i], sizeof(*tb->tbl[i]) * tb->row);
 873                 if (tb->tbl[i] == NULL)
 874                         err(EXIT_FAILURE, "realloc");
 875                 tb->tbl[i][tb->row - 1] = NULL;
 876         }
 877 }
 878
 879 static void
 880 tbl_flush(void)
 881 {
 882         const char *str;
 883         int i, j;
 884
 885         if (tb == NULL)
 886                 return;
 887
 888         assert(tb->col > 0);
 889         for (i = 0; i < tb->row; i++) {
 890                 if (style == STYLE_BERKELEY)
 891                         printf("  ");
 892                 for (j = 0; j < tb->col; j++) {
 893                         str = (tb->tbl[j][i] != NULL ? tb->tbl[j][i] : "");
 894                         if (style == STYLE_SYSV && j == 0)
 895                                 printf("%-*s", tb->width[j], str);
 896                         else if (style == STYLE_BERKELEY && j == tb->col - 1)
 897                                 printf("%s", str);
 898                         else
 899                                 printf("%*s", tb->width[j], str);
 900                         if (j == tb->col -1)
 901                                 putchar('\n');
 902                         else
 903                                 printf("   ");
 904                 }
 905         }
 906
 907         for (i = 0; i < tb->col; i++) {
 908                 for (j = 0; j < tb->row; j++) {
 909                         if (tb->tbl[i][j])
 910                                 free(tb->tbl[i][j]);
 911                 }
 912                 free(tb->tbl[i]);
 913         }
 914         free(tb->tbl);
 915         free(tb->width);
 916         free(tb);
 917         tb = NULL;
 918 }
 919
 920 #define USAGE_MESSAGE   "\
 921 Usage: %s [options] file ...\n\
 922   Display sizes of ELF sections.\n\n\
 923   Options:\n\
 924   --format=format    Display output in specified format.  Supported\n\
 925                      values are `berkeley' and `sysv'.\n\
 926   --help             Display this help message and exit.\n\
 927   --radix=radix      Display numeric values in the specified radix.\n\
 928                      Supported values are: 8, 10 and 16.\n\
 929   --totals           Show cumulative totals of section sizes.\n\
 930   --version          Display a version identifier and exit.\n\
 931   -A                 Equivalent to `--format=sysv'.\n\
 932   -B                 Equivalent to `--format=berkeley'.\n\
 933   -V                 Equivalent to `--version'.\n\
 934   -d                 Equivalent to `--radix=10'.\n\
 935   -h                 Same as option --help.\n\
 936   -o                 Equivalent to `--radix=8'.\n\
 937   -t                 Equivalent to option --totals.\n\
 938   -x                 Equivalent to `--radix=16'.\n"
 939
 940 static void
 941 usage(void)
 942 {
 943         (void) fprintf(stderr, USAGE_MESSAGE, ELFTC_GETPROGNAME());
 944         exit(EXIT_FAILURE);
 945 }
 946
 947 static void
 948 show_version(void)
 949 {
 950         (void) printf("%s (%s)\n", ELFTC_GETPROGNAME(), elftc_version());
 951         exit(EXIT_SUCCESS);
 952 }