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