tools/elf2hunk/elf2hunk.c

   1 /*
   2     Copyright © 1995-2001, The AROS Development Team. All rights reserved.
   3     $Id$
   4 */
   5
   6 #define PROTOTYPES
   7 #define HAVE_STDARG_H
   8
   9 #include <stdio.h>
  10 #include <string.h>
  11 #include <stdlib.h>
  12 #include <stdint.h>
  13 #include <assert.h>
  14 #include <ctype.h>
  15 #include <errno.h>
  16 #include <unistd.h>
  17 #include <fcntl.h>
  18 #include <limits.h>
  19 #include <dirent.h>
  20
  21 #include <sys/types.h>
  22 #include <sys/stat.h>
  23
  24 #define F_VERBOSE       (1 << 0)
  25 #define F_NOCONVERT     (1 << 1)
  26
  27 #if defined(__GNUC__)&&defined(WIN32)
  28 #include <winsock2.h>
  29 #define mkdir(path, mode) mkdir(path)
  30 #else
  31 #include <arpa/inet.h>
  32 typedef uint32_t ULONG;
  33 typedef int      BOOL;
  34 #endif
  35 typedef uint8_t  UBYTE;
  36 typedef uint16_t UWORD;
  37 typedef uint32_t IPTR;
  38 typedef int32_t  SIPTR;
  39 typedef char *   STRPTR;
  40
  41 #if !defined(FALSE)&&!defined(TRUE)
  42 #define FALSE 0
  43 #define TRUE (!FALSE)
  44 #endif
  45
  46 /* Memory allocation flags */
  47 #define MEMF_ANY           0L
  48 #define MEMF_PUBLIC        (1L<<0)
  49 #define MEMF_CHIP          (1L<<1)
  50 #define MEMF_FAST          (1L<<2)
  51 #define MEMF_EXECUTABLE    (1L<<4)  /* AmigaOS v4 compatible */
  52 #define MEMF_LOCAL         (1L<<8)
  53 #define MEMF_24BITDMA      (1L<<9)
  54 #define MEMF_KICK          (1L<<10)
  55 #define MEMF_31BIT         (1L<<12) /* Low address space (<2GB). Effective only on 64 bit machines. */
  56 #define MEMF_CLEAR         (1L<<16) /* Explicitly clear memory after allocation */
  57 #define MEMF_LARGEST       (1L<<17)
  58 #define MEMF_REVERSE       (1L<<18)
  59 #define MEMF_TOTAL         (1L<<19)
  60 #define MEMF_HWALIGNED     (1L<<20) /* For AllocMem() - align address and size to physical page boundary */
  61 #define MEMF_SEM_PROTECTED (1L<<20) /* For CreatePool() - add semaphore protection to the pool */
  62 #define MEMF_NO_EXPUNGE    (1L<<31)
  63
  64 #define HUNKF_ADVISORY     (1L<<29)
  65 #define HUNKF_CHIP         (1L<<30)
  66 #define HUNKF_FAST         (1L<<31)
  67 #define HUNKF_MEMFLAGS     (HUNKF_CHIP | HUNKF_FAST)
  68
  69
  70 #define HUNK_CODE       1001
  71 #define HUNK_DATA       1002
  72 #define HUNK_BSS        1003
  73 #define HUNK_RELOC32    1004
  74 #define HUNK_SYMBOL     1008
  75 #define HUNK_END        1010
  76 #define HUNK_HEADER     1011
  77
  78 #define SHT_PROGBITS    1
  79 #define SHT_SYMTAB      2
  80 #define SHT_STRTAB      3
  81 #define SHT_RELA        4
  82 #define SHT_NOBITS      8
  83 #define SHT_REL         9
  84 #define SHT_SYMTAB_SHNDX 18
  85
  86 #define ET_REL          1
  87 #define ET_EXEC         2
  88
  89 #define EM_386          3
  90 #define EM_68K          4
  91 #define EM_PPC         20
  92 #define EM_ARM         40
  93 #define EM_X86_64       62      /* AMD x86-64 */
  94
  95 #define R_386_NONE      0
  96 #define R_386_32        1
  97 #define R_386_PC32      2
  98
  99 /* AMD x86-64 relocations.  */
 100 #define R_X86_64_NONE   0       /* No reloc */
 101 #define R_X86_64_64     1       /* Direct 64 bit  */
 102 #define R_X86_64_PC32   2       /* PC relative 32 bit signed */
 103 #define R_X86_64_32     10
 104 #define R_X86_64_32S    11
 105
 106 #define R_68k_NONE      0
 107 #define R_68K_32        1
 108 #define R_68K_PC32      4
 109 #define R_68K_PC16      5
 110
 111 #define R_PPC_NONE      0
 112 #define R_PPC_ADDR32    1
 113 #define R_PPC_ADDR16_LO 4
 114 #define R_PPC_ADDR16_HA 6
 115 #define R_PPC_REL24     10
 116 #define R_PPC_REL32     26
 117 #define R_PPC_REL16_LO  250
 118 #define R_PPC_REL16_HA  252
 119
 120 #define R_ARM_NONE        0
 121 #define R_ARM_PC24        1
 122 #define R_ARM_ABS32       2
 123 #define R_ARM_CALL        28
 124 #define R_ARM_JUMP24      29
 125 #define R_ARM_V4BX        40
 126 #define R_ARM_PREL31      42
 127 #define R_ARM_MOVW_ABS_NC 43
 128 #define R_ARM_MOVT_ABS    44
 129
 130 #define STT_NOTYPE      0
 131 #define STT_OBJECT      1
 132 #define STT_FUNC        2
 133 #define STT_SECTION     3
 134 #define STT_FILE        4
 135 #define STT_LOPROC      13
 136 #define STT_HIPROC      15
 137
 138 #define SHN_UNDEF       0
 139 #define SHN_LORESERVE   0xff00
 140 #define SHN_ABS         0xfff1
 141 #define SHN_COMMON      0xfff2
 142 #define SHN_XINDEX      0xffff
 143 #define SHN_HIRESERVE   0xffff
 144
 145 #define SHF_WRITE       (1 << 0)
 146 #define SHF_ALLOC       (1 << 1)
 147 #define SHF_EXECINSTR   (1 << 2)
 148
 149 #define ELF_ST_TYPE(i)    ((i) & 0x0F)
 150
 151 #define EI_VERSION      6
 152 #define EV_CURRENT      1
 153
 154 #define EI_DATA         5
 155 #define ELFDATA2LSB     1
 156 #define ELFDATA2MSB     2
 157
 158 #define EI_CLASS        4
 159 #define ELFCLASS32      1
 160 #define ELFCLASS64      2               /* 64-bit objects */
 161
 162 #define EI_OSABI        7
 163 #define EI_ABIVERSION   8
 164
 165 #define ELFOSABI_AROS   15
 166
 167 #define PF_X            (1 << 0)
 168
 169 struct elfheader
 170 {
 171     UBYTE ident[16];
 172     UWORD type;
 173     UWORD machine;
 174     ULONG version;
 175     IPTR  entry;
 176     IPTR  phoff;
 177     IPTR  shoff;
 178     ULONG flags;
 179     UWORD ehsize;
 180     UWORD phentsize;
 181     UWORD phnum;
 182     UWORD shentsize;
 183     UWORD shnum;
 184     UWORD shstrndx;
 185 } __attribute__((packed));
 186
 187 struct sheader
 188 {
 189     ULONG name;
 190     ULONG type;
 191     IPTR  flags;
 192     IPTR  addr;
 193     IPTR  offset;
 194     IPTR  size;
 195     ULONG link;
 196     ULONG info;
 197     IPTR  addralign;
 198     IPTR  entsize;
 199 } __attribute__((packed));
 200
 201 #define PT_LOAD 1
 202
 203 struct pheader
 204 {
 205     ULONG type;
 206     ULONG offset;
 207     IPTR  vaddr;
 208     IPTR  paddr;
 209     ULONG filesz;
 210     ULONG memsz;
 211     ULONG flags;
 212     ULONG align;
 213 } __attribute__((packed));
 214
 215 struct symbol
 216 {
 217     ULONG name;     /* Offset of the name string in the string table */
 218     IPTR  value;    /* Varies; eg. the offset of the symbol in its hunk */
 219     IPTR  size;     /* How much memory does the symbol occupy */
 220     UBYTE info;     /* What kind of symbol is this ? (global, variable, etc) */
 221     UBYTE other;    /* undefined */
 222     UWORD shindex;  /* In which section is the symbol defined ? */
 223 } __attribute__((packed));
 224
 225 #define ELF_R_SYM(val)        ((val) >> 8)
 226 #define ELF_R_TYPE(val)       ((val) & 0xff)
 227 #define ELF_R_INFO(sym, type) (((sym) << 8) + ((type) & 0xff))
 228
 229 struct relo
 230 {
 231     IPTR  offset;   /* Address of the relocation relative to the section it refers to */
 232     IPTR  info;     /* Type of the relocation */
 233     SIPTR addend;   /* Constant addend used to compute value */
 234 };
 235
 236 /* convert section header number to array index */
 237 #define SHINDEX(n) \
 238     ((n) < SHN_LORESERVE ? (n) : ((n) <= SHN_HIRESERVE ? 0 : (n) - (SHN_HIRESERVE + 1 - SHN_LORESERVE)))
 239
 240 /* convert section header array index to section number */
 241 #define SHNUM(i) \
 242     ((i) < SHN_LORESERVE ? (i) : (i) + (SHN_HIRESERVE + 1 - SHN_LORESERVE))
 243
 244 /* m68k Machine's native values */
 245 #define AROS_ELF_CLASS ELFCLASS32
 246 #define AROS_ELF_DATA ELFDATA2MSB
 247 #define AROS_ELF_MACHINE EM_68K
 248 #define AROS_ELF_REL     SHT_RELA
 249
 250
 251 #if defined(HAVE_STDARG_H) && defined(__STDC__) && __STDC__
 252 #   include <stdarg.h>
 253 #   define VA_START(args, lastarg) va_start(args, lastarg)
 254 #else
 255 #   include <varargs.h>
 256 #   define VA_START(args, lastarg) va_start(args)
 257 #endif
 258
 259 #ifdef PROTOTYPES
 260 #   define PARAMS(x) x
 261 #else
 262 #   define PARAMS(x) ()
 263 #endif /* PROTOTYPES */
 264
 265 static void set_error(int err)
 266 {
 267     errno = err;
 268 }
 269
 270 #if defined(DEBUG) && DEBUG
 271 #define D(x)    x
 272 #define DB2(x)  x
 273 #else
 274 #define D(x)
 275 #define DB2(x)
 276 #endif
 277 #define bug(fmt,args...)        fprintf(stderr, fmt ,##args )
 278
 279 static int must_swap = -1;
 280
 281 static void eh_fixup(struct elfheader *eh)
 282 {
 283     /* Endian swaps */
 284     if (eh->type == 256) {
 285         must_swap = 1;
 286         eh->type = ntohs(eh->type);
 287         eh->machine = ntohs(eh->machine);
 288         eh->version = ntohl(eh->version);
 289         eh->entry = ntohl(eh->entry);
 290         eh->phoff = ntohl(eh->phoff);
 291         eh->shoff = ntohl(eh->shoff);
 292         eh->flags = ntohl(eh->flags);
 293         eh->ehsize = ntohs(eh->ehsize);
 294         eh->phentsize = ntohs(eh->phentsize);
 295         eh->phnum = ntohs(eh->phnum);
 296         eh->shentsize = ntohs(eh->shentsize);
 297         eh->shnum = ntohs(eh->shnum);
 298         eh->shstrndx = ntohs(eh->shstrndx);
 299     } else {
 300         must_swap = 0;
 301     }
 302 }
 303
 304 static void sh_fixup(struct sheader *sh, int n)
 305 {
 306     if (must_swap == 0)
 307         return;
 308
 309     for (; n > 0; n--, sh++) {
 310         sh->name = ntohl(sh->name);
 311         sh->type = ntohl(sh->type);
 312         sh->flags = ntohl(sh->flags);
 313         sh->addr  = ntohl(sh->addr);
 314         sh->offset = ntohl(sh->offset);
 315         sh->size = ntohl(sh->size);
 316         sh->link = ntohl(sh->link);
 317         sh->info = ntohl(sh->info);
 318         sh->addralign = ntohl(sh->addralign);
 319         sh->entsize = ntohl(sh->entsize);
 320     }
 321 }
 322
 323 static void rel_fixup(struct relo *rel)
 324 {
 325     if (must_swap == 0)
 326         return;
 327
 328     rel->offset = ntohl(rel->offset);
 329     rel->info   = ntohl(rel->info);
 330     rel->addend = ntohl(rel->addend);
 331 }
 332
 333 void sym_fixup(struct symbol *sym)
 334 {
 335     if (must_swap == 0)
 336         return;
 337
 338     sym->name = ntohl(sym->name);
 339     sym->value = ntohl(sym->value);
 340     sym->size = ntohl(sym->size);
 341     sym->shindex = ntohs(sym->shindex);
 342 }
 343
 344 static void *load_block (int file,ULONG offset,ULONG size)
 345 {
 346     ULONG lsize = (size + sizeof(ULONG) - 1) / sizeof(ULONG);
 347     D(bug("[ELF2HUNK] Load Block\n"));
 348     D(bug("[ELF2HUNK] (size=%d)\n",(int)size));
 349     void *block = malloc(lsize * sizeof(ULONG));
 350     if (block) {
 351         lseek(file, offset, SEEK_SET);
 352         if (read(file, block, size) == size) {
 353             return block;
 354         }
 355
 356         free(block);
 357         set_error(EIO);
 358     } else
 359         set_error(ENOMEM);
 360
 361     return NULL;
 362 }
 363
 364 static ULONG read_shnum(int file, struct elfheader *eh)
 365 {
 366     ULONG shnum = eh->shnum;
 367
 368     /* the ELF header only uses 16 bits to store the count of section headers,
 369      * so it can't handle more than 65535 headers. if the count is 0, and an
 370      * offset is defined, then the real count can be found in the first
 371      * section header (which always exists).
 372      *
 373      * similarly, if the string table index is SHN_XINDEX, then the actual
 374      * index is found in the first section header also.
 375      *
 376      * see the System V ABI 2001-04-24 draft for more details.
 377      */
 378     if (eh->shnum == 0)
 379     {
 380         struct sheader sh;
 381
 382         if (eh->shoff == 0) {
 383             set_error(ENOEXEC);
 384             return 0;
 385         }
 386
 387         lseek(file, eh->shoff, SEEK_SET);
 388         if (read(file, &sh, sizeof(sh)) != sizeof(sh))
 389             return 0;
 390
 391         sh_fixup(&sh, 1);
 392
 393         /* wider section header count is in the size field */
 394         shnum = sh.size;
 395
 396         /* sanity, if they're still invalid then this isn't elf */
 397         if (shnum == 0)
 398             set_error(ENOEXEC);
 399     }
 400
 401     return shnum;
 402 }
 403
 404 static int load_header(int file, struct elfheader *eh)
 405 {
 406     lseek(file, 0, SEEK_SET);
 407     if (read(file, eh, sizeof(struct elfheader)) != sizeof(struct elfheader)) {
 408         D(bug("[ELF2HUNK] Can't read the %d byte ELF header\n", (int)sizeof(struct elfheader)));
 409         return 0;
 410     }
 411
 412     eh_fixup(eh);
 413
 414     if (eh->ident[0] != 0x7f || eh->ident[1] != 'E'  ||
 415         eh->ident[2] != 'L'  || eh->ident[3] != 'F') {
 416         D(bug("[ELF2HUNK] Not an ELF object\n"));
 417         return 0;
 418     }
 419     D(bug("[ELF2HUNK] ELF object\n"));
 420
 421     /* WANT_CLASS should be defined for your target */
 422     if (eh->ident[EI_CLASS]   != AROS_ELF_CLASS  ||
 423         eh->ident[EI_VERSION] != EV_CURRENT      ||
 424         eh->type              != ET_REL          ||
 425         eh->ident[EI_DATA]    != AROS_ELF_DATA   ||
 426         eh->machine           != AROS_ELF_MACHINE)
 427     {
 428         D(bug("[ELF2HUNK] Object is of wrong type\n"));
 429         D(bug("[ELF2HUNK] EI_CLASS   is %d - should be %d\n", eh->ident[EI_CLASS]  , AROS_ELF_CLASS ));
 430         D(bug("[ELF2HUNK] EI_VERSION is %d - should be %d\n", eh->ident[EI_VERSION], EV_CURRENT     ));
 431         D(bug("[ELF2HUNK] type       is %d - should be %d\n", eh->type             , ET_REL         ));
 432         D(bug("[ELF2HUNK] EI_DATA    is %d - should be %d\n", eh->ident[EI_DATA]   , AROS_ELF_DATA  ));
 433         D(bug("[ELF2HUNK] machine    is %d - should be %d\n", eh->machine          , AROS_ELF_MACHINE));
 434
 435         set_error(ENOEXEC);
 436         return 0;
 437     }
 438
 439     return 1;
 440 }
 441
 442 struct hunkheader {
 443     ULONG type;
 444     ULONG memflags; /* Memory flags */
 445     ULONG size; /* Size in ULONGs */
 446     void *data;
 447     ULONG relocs;
 448     int   hunk; /* Allocatable hunk ID */
 449     struct hunkreloc {
 450         ULONG shid;     /* ELF hunk base to add to... */
 451         ULONG offset;   /* offset in this hunk. */
 452         const char *symbol;
 453     } *reloc;
 454 };
 455
 456 static int relocate
 457 (
 458     struct elfheader  *eh,
 459     struct sheader    *sh,
 460     ULONG              shrel_idx,
 461     int                symtab_shndx,
 462     struct relo       *rel,
 463     struct hunkheader **hh
 464 )
 465 {
 466     struct sheader *shrel    = &sh[shrel_idx];
 467     struct sheader *shsymtab = &sh[SHINDEX(shrel->link)];
 468     struct sheader *toreloc  = &sh[SHINDEX(shrel->info)];
 469
 470     struct symbol *symtab   = (struct symbol *)hh[SHINDEX(shrel->link)]->data;
 471     struct hunkheader *h    = hh[SHINDEX(shrel->info)];
 472
 473     /*
 474      * Ignore relocs if the target section has no allocation. that can happen
 475      * eg. with a .debug PROGBITS and a .rel.debug section
 476      */
 477     D(bug("[ELF2HUNK] sh[%d].flags = 0x%x\n", (int)SHINDEX(shrel->info), (int)toreloc->flags));
 478     if (!(toreloc->flags & SHF_ALLOC))
 479         return 1;
 480
 481     ULONG numrel = shrel->size / shrel->entsize;
 482     ULONG i;
 483     ULONG hrels;
 484
 485     hrels = h->relocs;
 486     h->relocs += numrel;
 487     h->reloc = realloc(h->reloc, h->relocs * sizeof(struct hunkreloc));
 488     struct hunkreloc *hrel = &h->reloc[hrels];
 489
 490     for (i=0; i<numrel; i++, rel++)
 491     {
 492         struct symbol sym;
 493         ULONG offset;
 494         ULONG shindex;
 495         ULONG hunk;
 496         ULONG value;
 497         const char *symname;
 498
 499         rel_fixup(rel);
 500
 501 #ifdef __arm__
 502         /*
 503          * R_ARM_V4BX are actually special marks for the linker.
 504          * They even never have a target (shindex == SHN_UNDEF),
 505          * so we simply ignore them before doing any checks.
 506          */
 507         if (ELF_R_TYPE(rel->info) == R_ARM_V4BX)
 508             continue;
 509 #endif
 510
 511         sym = symtab[ELF_R_SYM(rel->info)];
 512         sym_fixup(&sym);
 513         offset = rel->offset;
 514         symname = (const char *)(hh[SHINDEX(shsymtab->link)]->data + sym.name);
 515
 516         if (sym.shindex != SHN_XINDEX)
 517             shindex = sym.shindex;
 518
 519         else {
 520             if (symtab_shndx < 0) {
 521                 bug("[ELF2HUNK] got symbol with shndx 0xfff, but there's no symtab shndx table\n");
 522                 set_error(EINVAL);
 523                 return 0;
 524             }
 525             shindex = ntohl(((ULONG *)hh[symtab_shndx]->data)[ELF_R_SYM(rel->info)]);
 526         }
 527
 528         D(bug("[ELF2HUNK] Processing %d symbol %s\n", (int)shindex, symname));
 529
 530         switch (shindex)
 531         {
 532
 533             case SHN_UNDEF:
 534                 if (ELF_R_TYPE(rel->info) != 0) {
 535                     bug("[ELF2HUNK] SHN_UNDEF symbol '%s', type %d unsupported\n", symname, ELF_R_TYPE(rel->info));
 536                     set_error(EINVAL);
 537                     return 0;
 538                 }
 539                 break;
 540
 541             case SHN_COMMON:
 542                 bug("[ELF2HUNK] SHN_COMMON symbol '%s' unsupported\n", symname);
 543                       set_error(EINVAL);
 544
 545                 return 0;
 546
 547             case SHN_ABS:
 548                 hunk = ~0; value = sym.value;
 549                 break;
 550
 551             default:
 552                 hunk = SHINDEX(shindex);
 553                 value = sym.value;
 554                 break;
 555         }
 556
 557         switch (ELF_R_TYPE(rel->info))
 558         {
 559             case R_68K_32:
 560                 value += rel->addend;
 561                 break;
 562
 563             case R_68K_PC32:
 564                 value += rel->addend - offset;
 565                 break;
 566
 567             case R_68K_PC16:
 568                 bug("[ELF2HUNK] Unsupported relocation type R_68K_PC16\n");
 569                 set_error(EINVAL);
 570                 return 0;
 571                 break;
 572
 573             case R_68k_NONE:
 574                 break;
 575
 576             default:
 577                 bug("[ELF2HUNK] Unrecognized relocation type %d %d\n", (int)i, (int)ELF_R_TYPE(rel->info));
 578                 set_error(EINVAL);
 579                 return 0;
 580         }
 581
 582         D(bug("[ELF2HUNK]   Hunk %d, offset 0x%x: base 0x%x\n", (int)hunk, (int)offset, (int)value));
 583         *(ULONG *)(h->data + offset) = htonl(value + ntohl(*(ULONG *)(h->data + offset)));
 584         if (hunk == ~0) {
 585             h->relocs--;
 586             continue;
 587         }
 588         hrel->shid = hunk;
 589         hrel->offset = offset;
 590         hrel->symbol = symname;
 591         hrel++;
 592     }
 593
 594     return 1;
 595 }
 596
 597 int reloc_cmp(const void *a, const void *b)
 598 {
 599     const struct hunkreloc *ha = a, *hb = b;
 600
 601     if (ha->shid != hb->shid)
 602         return hb->shid - ha->shid;
 603     return hb->offset - ha->offset;
 604 }
 605
 606 static int wlong(int fd, ULONG val)
 607 {
 608     val = htonl(val);
 609     return write(fd, &val, sizeof(val));
 610 }
 611
 612 int sym_dump(int hunk_fd, struct sheader *sh, struct hunkheader **hh, int shid, int symtabndx)
 613 {
 614     int i, err, syms;
 615     struct symbol *sym = hh[symtabndx]->data;
 616     struct sheader *symtab = &sh[SHINDEX(symtabndx)];
 617
 618     syms = symtab->size / sizeof(struct symbol);
 619
 620     if (syms == 0)
 621         return 1;
 622
 623     wlong(hunk_fd, HUNK_SYMBOL);
 624     wlong(hunk_fd, syms);
 625
 626     /* Dump symbols for this hunk */
 627     for (i = 0; i < syms ; i++) {
 628         struct symbol s;
 629         const char *name;
 630         int lsize;
 631
 632         s = sym[i];
 633         sym_fixup(&s);
 634
 635         if (SHINDEX(s.shindex) != shid)
 636             continue;
 637
 638         name = (const char *)(hh[SHINDEX(symtab->link)]->data + s.name);
 639         D(bug("\t0x%08x: %s\n", (int)s.value, name));
 640         lsize = (strlen(name) + 4) / 4;
 641         wlong(hunk_fd, lsize);
 642         err = write(hunk_fd, name, lsize * 4);
 643         if (err < 0)
 644             return 0;
 645         wlong(hunk_fd, s.value);
 646     }
 647     wlong(hunk_fd, 0);
 648
 649     return 1;
 650 }
 651
 652 static void reloc_dump(int hunk_fd, struct hunkheader **hh, int h)
 653 {
 654     int i;
 655
 656     if (hh[h]->relocs == 0)
 657         return;
 658
 659     /* Sort the relocations by reference hunk id */
 660     qsort(hh[h]->reloc, hh[h]->relocs, sizeof(hh[h]->reloc[0]), reloc_cmp);
 661
 662     wlong(hunk_fd, HUNK_RELOC32);
 663     D(bug("\tHUNK_RELOC32: %d relocations\n", (int)hh[h]->relocs));
 664
 665     for (i = 0; i < hh[h]->relocs; ) {
 666         int count;
 667         int shid = hh[h]->reloc[i].shid;
 668         for (count = i; count < hh[h]->relocs; count++)
 669             if (hh[h]->reloc[count].shid != shid)
 670                 break;
 671         count -= i;
 672         wlong(hunk_fd, count);
 673         D(bug("\t  %d relocations relative to Hunk %d\n", count, hh[shid]->hunk));
 674         /* Convert from ELF hunk ID to AOS hunk ID */
 675         wlong(hunk_fd, hh[shid]->hunk);
 676         for (; count > 0; i++, count--) {
 677             D(bug("\t\t%d: 0x%08x %s\n", i, (int)hh[h]->reloc[i].offset, hh[h]->reloc[i].symbol));
 678             wlong(hunk_fd, hh[h]->reloc[i].offset);
 679         }
 680     }
 681     wlong(hunk_fd, 0);
 682 }
 683
 684 static int copy_to(int in, int out)
 685 {
 686     static char buff[64*1024];
 687     int len, err = 0;
 688
 689     do {
 690         len = read(in, buff, sizeof(buff));
 691         if (len < 0) {
 692             perror("Can't read from input file\n");
 693             err = len;
 694         }
 695         if (len == 0)
 696             break;
 697     } while ((err = write(out, buff, len)) == len);
 698
 699     if (err < 0) {
 700             perror("Can't write to output file\n");
 701             return -errno;
 702     }
 703
 704     return 0;
 705 }
 706
 707 int elf2hunk(int file, int hunk_fd, const char *libname, int flags)
 708 {
 709     const __attribute__((unused)) char *names[3]={ "CODE", "DATA", "BSS" };
 710     struct hunkheader **hh;
 711     struct elfheader  eh;
 712     struct sheader   *sh;
 713     char *strtab;
 714     int symtab_shndx = -1;
 715     int err;
 716     ULONG  i;
 717     BOOL   exec_hunk_seen = FALSE;
 718     ULONG  int_shnum;
 719     int hunks = 0;
 720
 721     /* load and validate ELF header */
 722     D(bug("Load header\n"));
 723     if ((flags & F_NOCONVERT) || !load_header(file, &eh)) {
 724         /* If it's not an ELF, just copy it.
 725          *
 726          * This simplifies a number of mmakefiles
 727          * for the m68k-amiga boot and ISO creation
 728          */
 729         lseek(file, 0, SEEK_SET);
 730         return (copy_to(file, hunk_fd) == 0) ? EXIT_SUCCESS : EXIT_FAILURE;
 731     }
 732
 733     D(bug("Read SHNum\n"));
 734     int_shnum = read_shnum(file, &eh);
 735     if (!int_shnum)
 736         return EXIT_FAILURE;
 737
 738     /* load section headers */
 739     D(bug("Load %d Section Headers @0x%08x\n", int_shnum, (int)eh.shoff));
 740     if (!(sh = load_block(file, eh.shoff, int_shnum * eh.shentsize)))
 741         return EXIT_FAILURE;
 742
 743     sh_fixup(sh, int_shnum);
 744
 745     /* Looks like we have a valid executable. Generate a
 746      * HUNK header set. Not all may be filled in.
 747      */
 748     hh = calloc(sizeof(*hh), int_shnum);
 749
 750     /* Look for the string table */
 751     D(bug("Look for string table\n"));
 752     for (i = 0; i < int_shnum; i++) {
 753         if (sh[i].type == SHT_STRTAB) {
 754             strtab = load_block(file, sh[i].offset, sh[i].size);
 755             break;
 756         }
 757     }
 758
 759     /* Iterate over the section headers in order to do some stuff... */
 760     D(bug("Look for symbol tables\n"));
 761     for (i = 0; i < int_shnum; i++)
 762     {
 763         /*
 764            Load the symbol and string table(s).
 765
 766            NOTICE: the ELF standard, at the moment (Nov 2002) explicitely states
 767                    that only one symbol table per file is allowed. However, it
 768                    also states that this may change in future... we already handle it.
 769         */
 770         D(bug("sh[%d].type = 0x%08x, .offset = 0x%08x, .size = 0x%08x\n",
 771                     (int)i, (int)sh[i].type, (int)sh[i].offset, (int)sh[i].size));
 772         if (sh[i].type == SHT_SYMTAB || sh[i].type == SHT_STRTAB || sh[i].type == SHT_SYMTAB_SHNDX)
 773         {
 774             hh[i] = calloc(sizeof(struct hunkheader), 1);
 775             hh[i]->type = (sh[i].type == SHT_SYMTAB) ? HUNK_SYMBOL : 0;
 776             hh[i]->memflags = 0;
 777             hh[i]->hunk = -1;
 778             hh[i]->data = load_block(file, sh[i].offset, sh[i].size);
 779             if (!hh[i]->data)
 780                 goto error;
 781
 782             if (sh[i].type == SHT_SYMTAB_SHNDX) {
 783                 if (symtab_shndx == -1)
 784                     symtab_shndx = i;
 785                 else
 786                     D(bug("[ELF2HUNK] file contains multiple symtab shndx tables. only using the first one\n"));
 787             }
 788         }
 789         else
 790         /* Load the section in memory if needed, and make an hunk out of it */
 791         if (sh[i].flags & SHF_ALLOC && sh[i].size > 0)
 792         {
 793             hh[i] = calloc(sizeof(struct hunkheader), 1);
 794             hh[i]->size = sh[i].size;
 795             hh[i]->hunk = hunks++;
 796
 797             if (sh[i].type == SHT_NOBITS) {
 798                 /* BSS area */
 799                 hh[i]->type = HUNK_BSS;
 800                 hh[i]->memflags = 0;
 801                 hh[i]->data = NULL;
 802             } else {
 803                 if (sh[i].flags & SHF_EXECINSTR) {
 804                     hh[i]->type = HUNK_CODE;
 805                     exec_hunk_seen = TRUE;
 806                 } else {
 807                     hh[i]->type = HUNK_DATA;
 808                 }
 809                 hh[i]->data = load_block(file, sh[i].offset, sh[i].size);
 810             }
 811
 812             if (strtab) {
 813                 const char *nameext;
 814
 815                 D(bug("section %s\n", strtab + sh[i].name));
 816                 nameext = strrchr(strtab + sh[i].name, '.');
 817                 if (nameext) {
 818                     if (strcmp(nameext, ".MEMF_CHIP")==0) {
 819                         hh[i]->memflags |= MEMF_CHIP;
 820                     } else if (strcmp(nameext, ".MEMF_LOCAL")==0) {
 821                         hh[i]->memflags |= MEMF_LOCAL;
 822                     } else if (strcmp(nameext, ".MEMF_KICK")==0) {
 823                         hh[i]->memflags |= MEMF_KICK;
 824                     } else if (strcmp(nameext, ".MEMF_FAST")==0) {
 825                         hh[i]->memflags |= MEMF_FAST;
 826                     }
 827                 }
 828             }
 829         }
 830     }
 831
 832     /* Relocate the sections */
 833     D(bug("Convert relocation tables\n"));
 834     for (i = 0; i < int_shnum; i++)
 835     {
 836         /* Does this relocation section refer to a hunk? If so, addr must be != 0 */
 837         if ((sh[i].type == AROS_ELF_REL)
 838                 && hh[SHINDEX(sh[i].info)]
 839                 && hh[SHINDEX(sh[i].info)]->data)
 840         {
 841             void *reloc = load_block(file, sh[i].offset, sh[i].size);
 842
 843             if (!relocate(&eh, sh, i, symtab_shndx, reloc, hh))
 844                     return EXIT_FAILURE;
 845
 846             free(reloc);
 847         }
 848     }
 849
 850     D(bug("HUNK_HEADER: \"%s\", hunks=%d, first=%d, last=%d\n", libname, hunks, 0, hunks-1));
 851
 852     wlong(hunk_fd, HUNK_HEADER);
 853     if (libname == NULL) {
 854         wlong(hunk_fd, 0);      /* No name */
 855     } else {
 856         int lsize = (strlen(libname) + 4) / 4;
 857         wlong(hunk_fd, lsize);
 858         err = write(hunk_fd, libname, lsize * 4);
 859         if (err < 0)
 860             return EXIT_FAILURE;
 861     }
 862     wlong(hunk_fd, hunks);
 863     wlong(hunk_fd, 0);  /* First hunk is #0 */
 864     wlong(hunk_fd, hunks - 1); /* Last hunk is hunks-1 */
 865
 866     /* Write all allocatable hunk sizes */
 867     for (i = 0; i < int_shnum; i++) {
 868         ULONG count;
 869
 870         if (hh[i]==NULL || hh[i]->hunk < 0)
 871             continue;
 872
 873         count = (hh[i]->size + 4) / 4;
 874         switch (hh[i]->memflags) {
 875         case MEMF_CHIP:
 876             count |= HUNKF_CHIP;
 877             break;
 878         case MEMF_FAST:
 879             count |= HUNKF_FAST;
 880             break;
 881         case 0:
 882             break;
 883         default:
 884             count |= HUNKF_MEMFLAGS;
 885             break;
 886         }
 887
 888         D(bug("\tHunk #%d, %s, lsize=%d\n", hh[i]->hunk, names[hh[i]->type - HUNK_CODE], (int)(hh[i]->size+4)/4));
 889         wlong(hunk_fd, count);
 890
 891         if ((count & HUNKF_MEMFLAGS) == HUNKF_MEMFLAGS)
 892             wlong(hunk_fd, hh[i]->memflags | MEMF_PUBLIC | MEMF_CLEAR);
 893     }
 894
 895     /* Write all hunks */
 896     for (i = hunks = 0; i < int_shnum; i++) {
 897         int s;
 898
 899         if (hh[i]==NULL || hh[i]->hunk < 0)
 900             continue;
 901
 902         wlong(hunk_fd, hh[i]->type);
 903         wlong(hunk_fd, (hh[i]->size + 4) / 4);
 904
 905         switch (hh[i]->type) {
 906         case HUNK_BSS:
 907             D(bug("HUNK_BSS: %d longs\n", (int)((hh[i]->size + 4) / 4)));
 908 if (0) {
 909             for (s = 0; s < int_shnum; s++) {
 910                 if (hh[s] && hh[s]->type == HUNK_SYMBOL)
 911                     sym_dump(hunk_fd, sh, hh, i, s);
 912             }
 913 }
 914             wlong(hunk_fd, HUNK_END);
 915             hunks++;
 916             break;
 917         case HUNK_CODE:
 918         case HUNK_DATA:
 919             D(bug("#%d HUNK_%s: %d longs\n", hh[i]->hunk, hh[i]->type == HUNK_CODE ? "CODE" : "DATA", (int)((hh[i]->size + 4) / 4)));
 920             err = write(hunk_fd, hh[i]->data, ((hh[i]->size + 4)/4)*4);
 921             if (err < 0)
 922                 return EXIT_FAILURE;
 923 if (0) {
 924             for (s = 0; s < int_shnum; s++) {
 925                 if (hh[s] && hh[s]->type == HUNK_SYMBOL)
 926                     sym_dump(hunk_fd, sh, hh, i, s);
 927             }
 928 }
 929             reloc_dump(hunk_fd, hh, i);
 930             wlong(hunk_fd, HUNK_END);
 931             D(bug("\tHUNK_END\n"));
 932             break;
 933         default:
 934             D(bug("Unsupported allocatable hunk type %d\n", (int)hh[i]->type));
 935             return EXIT_FAILURE;
 936         }
 937     }
 938
 939     /* Free all blocks */
 940     for (i = 0; i < int_shnum; i++) {
 941         if (hh[i]) {
 942             if (hh[i]->data)
 943                 free(hh[i]->data);
 944             if (hh[i]->reloc)
 945                 free(hh[i]->reloc);
 946             free(hh[i]);
 947         }
 948     }
 949     free(hh);
 950     free(sh);
 951
 952     if (strtab)
 953         free(strtab);
 954
 955     D(bug("All good, all done.\n"));
 956     return EXIT_SUCCESS;
 957
 958 error:
 959     return EXIT_FAILURE;
 960 }
 961
 962 static int copy(const char *src, const char *dst, int flags);
 963
 964 static int copy_dir(const char *src, const char *dst, int flags)
 965 {
 966     DIR *sdir;
 967     struct dirent *de;
 968     char spath[PATH_MAX], dpath[PATH_MAX];
 969     char *sp, *dp;
 970     int sleft, dleft;
 971     int err = EXIT_SUCCESS;
 972
 973     sdir = opendir(src);
 974     if (sdir == NULL) {
 975         perror(src);
 976         return EXIT_FAILURE;
 977     }
 978
 979     snprintf(spath, sizeof(spath), "%s/", src);
 980     spath[sizeof(spath)-1] = 0;
 981     sp = &spath[strlen(spath)];
 982     sleft = &spath[sizeof(spath)-1] - sp;
 983
 984     snprintf(dpath, sizeof(dpath), "%s/", dst);
 985     dpath[sizeof(dpath)-1] = 0;
 986     dp = &dpath[strlen(dpath)];
 987     dleft = &dpath[sizeof(dpath)-1] - dp;
 988
 989     while ((de = readdir(sdir)) != NULL) {
 990         int eflags = 0;
 991
 992         if ((strcmp(de->d_name, ".") == 0) ||
 993             (strcmp(de->d_name, "..") == 0))
 994             continue;
 995
 996         /* Don't convert anything in a Development directory */
 997         if (strcasecmp(de->d_name, "Development") == 0)
 998             eflags |= F_NOCONVERT;
 999
1000         strncpy(sp, de->d_name, sleft);
1001         sp[sleft-1] = 0;
1002         strncpy(dp, de->d_name, dleft);
1003         dp[dleft-1] = 0;
1004         err = copy(spath, dpath, flags | eflags);
1005         if (err != EXIT_SUCCESS)
1006             break;
1007     }
1008
1009     closedir(sdir);
1010
1011     return err;
1012 }
1013
1014 static int copy(const char *src, const char *dst, int flags)
1015 {
1016     int src_fd, hunk_fd;
1017     struct stat st;
1018     int mode, ret;
1019
1020     if (flags & F_VERBOSE)
1021        printf("%s ->\n  %s\n", src, dst);
1022
1023     if (stat(src, &st) >= 0) {
1024         mode = st.st_mode;
1025     } else {
1026         mode = 0755;
1027     }
1028
1029     if (S_ISDIR(mode)) {
1030         unlink(dst);
1031         mkdir(dst, mode);
1032         return copy_dir(src, dst, flags);
1033     }
1034
1035     src_fd = open(src, O_RDONLY);
1036     if (src_fd < 0) {
1037         perror(src);
1038         return EXIT_FAILURE;
1039     }
1040
1041     if (strcmp(dst,"-") == 0)
1042         hunk_fd = 1; /* stdout */
1043     else {
1044         unlink(dst);
1045         hunk_fd = open(dst, O_RDWR | O_CREAT | O_TRUNC, mode);
1046     }
1047     if (hunk_fd < 0) {
1048         perror(dst);
1049         return EXIT_FAILURE;
1050     }
1051
1052     ret = elf2hunk(src_fd, hunk_fd, NULL, flags);
1053     if (ret != 0)
1054         perror(src);
1055
1056     close(src_fd);
1057     if (hunk_fd != 1)
1058         close(hunk_fd);
1059
1060     return ret;
1061 }
1062
1063 int main(int argc, char **argv)
1064 {
1065     int flags = 0;
1066
1067     if (argc == 4 && strcmp(argv[1],"-v") == 0) {
1068         flags |= F_VERBOSE;
1069         argc--;
1070         argv++;
1071     }
1072
1073     if (argc != 3) {
1074         fprintf(stderr, "Usage:\n%s file.elf file.hunk\n", argv[0]);
1075         fprintf(stderr, "%s src-dir dest-dir\n", argv[0]);
1076         return EXIT_FAILURE;
1077     }
1078
1079     return copy(argv[1], argv[2], flags);
1080 }