dyngen.c

   1 /*
   2  *  Generic Dynamic compiler generator
   3  *
   4  *  Copyright (c) 2003 Fabrice Bellard
   5  *
   6  *  The COFF object format support was extracted from Kazu's QEMU port
   7  *  to Win32.
   8  *
   9  *  Mach-O Support by Matt Reda and Pierre d'Herbemont
  10  *
  11  *  This program is free software; you can redistribute it and/or modify
  12  *  it under the terms of the GNU General Public License as published by
  13  *  the Free Software Foundation; either version 2 of the License, or
  14  *  (at your option) any later version.
  15  *
  16  *  This program is distributed in the hope that it will be useful,
  17  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  *  GNU General Public License for more details.
  20  *
  21  *  You should have received a copy of the GNU General Public License
  22  *  along with this program; if not, write to the Free Software
  23  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24  */
  25 #include <stdlib.h>
  26 #include <stdio.h>
  27 #include <string.h>
  28 #include <stdarg.h>
  29 #include <inttypes.h>
  30 #include <unistd.h>
  31 #include <fcntl.h>
  32
  33 #include "config-host.h"
  34
  35 /* NOTE: we test CONFIG_WIN32 instead of _WIN32 to enabled cross
  36    compilation */
  37 #if defined(CONFIG_WIN32)
  38 #define CONFIG_FORMAT_COFF
  39 #elif defined(CONFIG_DARWIN)
  40 #define CONFIG_FORMAT_MACH
  41 #else
  42 #define CONFIG_FORMAT_ELF
  43 #endif
  44
  45 #ifdef CONFIG_FORMAT_ELF
  46
  47 /* elf format definitions. We use these macros to test the CPU to
  48    allow cross compilation (this tool must be ran on the build
  49    platform) */
  50 #if defined(HOST_I386)
  51
  52 #define ELF_CLASS       ELFCLASS32
  53 #define ELF_ARCH        EM_386
  54 #define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) )
  55 #undef ELF_USES_RELOCA
  56
  57 #elif defined(HOST_X86_64)
  58
  59 #define ELF_CLASS       ELFCLASS64
  60 #define ELF_ARCH        EM_X86_64
  61 #define elf_check_arch(x) ((x) == EM_X86_64)
  62 #define ELF_USES_RELOCA
  63
  64 #elif defined(HOST_PPC)
  65
  66 #define ELF_CLASS       ELFCLASS32
  67 #define ELF_ARCH        EM_PPC
  68 #define elf_check_arch(x) ((x) == EM_PPC)
  69 #define ELF_USES_RELOCA
  70
  71 #elif defined(HOST_S390)
  72
  73 #define ELF_CLASS       ELFCLASS32
  74 #define ELF_ARCH        EM_S390
  75 #define elf_check_arch(x) ((x) == EM_S390)
  76 #define ELF_USES_RELOCA
  77
  78 #elif defined(HOST_ALPHA)
  79
  80 #define ELF_CLASS       ELFCLASS64
  81 #define ELF_ARCH        EM_ALPHA
  82 #define elf_check_arch(x) ((x) == EM_ALPHA)
  83 #define ELF_USES_RELOCA
  84
  85 #elif defined(HOST_IA64)
  86
  87 #define ELF_CLASS       ELFCLASS64
  88 #define ELF_ARCH        EM_IA_64
  89 #define elf_check_arch(x) ((x) == EM_IA_64)
  90 #define ELF_USES_RELOCA
  91
  92 #elif defined(HOST_SPARC)
  93
  94 #define ELF_CLASS       ELFCLASS32
  95 #define ELF_ARCH        EM_SPARC
  96 #define elf_check_arch(x) ((x) == EM_SPARC || (x) == EM_SPARC32PLUS)
  97 #define ELF_USES_RELOCA
  98
  99 #elif defined(HOST_SPARC64)
 100
 101 #define ELF_CLASS       ELFCLASS64
 102 #define ELF_ARCH        EM_SPARCV9
 103 #define elf_check_arch(x) ((x) == EM_SPARCV9)
 104 #define ELF_USES_RELOCA
 105
 106 #elif defined(HOST_ARM)
 107
 108 #define ELF_CLASS       ELFCLASS32
 109 #define ELF_ARCH        EM_ARM
 110 #define elf_check_arch(x) ((x) == EM_ARM)
 111 #define ELF_USES_RELOC
 112
 113 #elif defined(HOST_M68K)
 114
 115 #define ELF_CLASS       ELFCLASS32
 116 #define ELF_ARCH        EM_68K
 117 #define elf_check_arch(x) ((x) == EM_68K)
 118 #define ELF_USES_RELOCA
 119
 120 #else
 121 #error unsupported CPU - please update the code
 122 #endif
 123
 124 #include "elf.h"
 125
 126 #if ELF_CLASS == ELFCLASS32
 127 typedef int32_t host_long;
 128 typedef uint32_t host_ulong;
 129 #define swabls(x) swab32s(x)
 130 #else
 131 typedef int64_t host_long;
 132 typedef uint64_t host_ulong;
 133 #define swabls(x) swab64s(x)
 134 #endif
 135
 136 #ifdef ELF_USES_RELOCA
 137 #define SHT_RELOC SHT_RELA
 138 #else
 139 #define SHT_RELOC SHT_REL
 140 #endif
 141
 142 #define EXE_RELOC ELF_RELOC
 143 #define EXE_SYM ElfW(Sym)
 144
 145 #endif /* CONFIG_FORMAT_ELF */
 146
 147 #ifdef CONFIG_FORMAT_COFF
 148
 149 #include "a.out.h"
 150
 151 typedef int32_t host_long;
 152 typedef uint32_t host_ulong;
 153
 154 #define FILENAMELEN 256
 155
 156 typedef struct coff_sym {
 157     struct external_syment *st_syment;
 158     char st_name[FILENAMELEN];
 159     uint32_t st_value;
 160     int  st_size;
 161     uint8_t st_type;
 162     uint8_t st_shndx;
 163 } coff_Sym;
 164
 165 typedef struct coff_rel {
 166     struct external_reloc *r_reloc;
 167     int  r_offset;
 168     uint8_t r_type;
 169 } coff_Rel;
 170
 171 #define EXE_RELOC struct coff_rel
 172 #define EXE_SYM struct coff_sym
 173
 174 #endif /* CONFIG_FORMAT_COFF */
 175
 176 #ifdef CONFIG_FORMAT_MACH
 177
 178 #include <mach-o/loader.h>
 179 #include <mach-o/nlist.h>
 180 #include <mach-o/reloc.h>
 181 #include <mach-o/ppc/reloc.h>
 182
 183 # define check_mach_header(x) (x.magic == MH_MAGIC)
 184 typedef int32_t host_long;
 185 typedef uint32_t host_ulong;
 186
 187 struct nlist_extended
 188 {
 189    union {
 190    char *n_name;
 191    long  n_strx;
 192    } n_un;
 193    unsigned char n_type;
 194    unsigned char n_sect;
 195    short st_desc;
 196    unsigned long st_value;
 197    unsigned long st_size;
 198 };
 199
 200 #define EXE_RELOC struct relocation_info
 201 #define EXE_SYM struct nlist_extended
 202
 203 #endif /* CONFIG_FORMAT_MACH */
 204
 205 #include "bswap.h"
 206
 207 enum {
 208     OUT_GEN_OP,
 209     OUT_CODE,
 210     OUT_INDEX_OP,
 211 };
 212
 213 /* all dynamically generated functions begin with this code */
 214 #define OP_PREFIX "op_"
 215
 216 int do_swap;
 217
 218 void __attribute__((noreturn)) __attribute__((format (printf, 1, 2))) error(const char *fmt, ...)
 219 {
 220     va_list ap;
 221     va_start(ap, fmt);
 222     fprintf(stderr, "dyngen: ");
 223     vfprintf(stderr, fmt, ap);
 224     fprintf(stderr, "\n");
 225     va_end(ap);
 226     exit(1);
 227 }
 228
 229 void *load_data(int fd, long offset, unsigned int size)
 230 {
 231     char *data;
 232
 233     data = malloc(size);
 234     if (!data)
 235         return NULL;
 236     lseek(fd, offset, SEEK_SET);
 237     if (read(fd, data, size) != size) {
 238         free(data);
 239         return NULL;
 240     }
 241     return data;
 242 }
 243
 244 int strstart(const char *str, const char *val, const char **ptr)
 245 {
 246     const char *p, *q;
 247     p = str;
 248     q = val;
 249     while (*q != '\0') {
 250         if (*p != *q)
 251             return 0;
 252         p++;
 253         q++;
 254     }
 255     if (ptr)
 256         *ptr = p;
 257     return 1;
 258 }
 259
 260 void pstrcpy(char *buf, int buf_size, const char *str)
 261 {
 262     int c;
 263     char *q = buf;
 264
 265     if (buf_size <= 0)
 266         return;
 267
 268     for(;;) {
 269         c = *str++;
 270         if (c == 0 || q >= buf + buf_size - 1)
 271             break;
 272         *q++ = c;
 273     }
 274     *q = '\0';
 275 }
 276
 277 void swab16s(uint16_t *p)
 278 {
 279     *p = bswap16(*p);
 280 }
 281
 282 void swab32s(uint32_t *p)
 283 {
 284     *p = bswap32(*p);
 285 }
 286
 287 void swab64s(uint64_t *p)
 288 {
 289     *p = bswap64(*p);
 290 }
 291
 292 uint16_t get16(uint16_t *p)
 293 {
 294     uint16_t val;
 295     val = *p;
 296     if (do_swap)
 297         val = bswap16(val);
 298     return val;
 299 }
 300
 301 uint32_t get32(uint32_t *p)
 302 {
 303     uint32_t val;
 304     val = *p;
 305     if (do_swap)
 306         val = bswap32(val);
 307     return val;
 308 }
 309
 310 void put16(uint16_t *p, uint16_t val)
 311 {
 312     if (do_swap)
 313         val = bswap16(val);
 314     *p = val;
 315 }
 316
 317 void put32(uint32_t *p, uint32_t val)
 318 {
 319     if (do_swap)
 320         val = bswap32(val);
 321     *p = val;
 322 }
 323
 324 /* executable information */
 325 EXE_SYM *symtab;
 326 int nb_syms;
 327 int text_shndx;
 328 uint8_t *text;
 329 EXE_RELOC *relocs;
 330 int nb_relocs;
 331
 332 #ifdef CONFIG_FORMAT_ELF
 333
 334 /* ELF file info */
 335 struct elf_shdr *shdr;
 336 uint8_t **sdata;
 337 struct elfhdr ehdr;
 338 char *strtab;
 339
 340 int elf_must_swap(struct elfhdr *h)
 341 {
 342   union {
 343       uint32_t i;
 344       uint8_t b[4];
 345   } swaptest;
 346
 347   swaptest.i = 1;
 348   return (h->e_ident[EI_DATA] == ELFDATA2MSB) !=
 349       (swaptest.b[0] == 0);
 350 }
 351
 352 void elf_swap_ehdr(struct elfhdr *h)
 353 {
 354     swab16s(&h->e_type);                        /* Object file type */
 355     swab16s(&h->        e_machine);             /* Architecture */
 356     swab32s(&h->        e_version);             /* Object file version */
 357     swabls(&h-> e_entry);               /* Entry point virtual address */
 358     swabls(&h-> e_phoff);               /* Program header table file offset */
 359     swabls(&h-> e_shoff);               /* Section header table file offset */
 360     swab32s(&h->        e_flags);               /* Processor-specific flags */
 361     swab16s(&h->        e_ehsize);              /* ELF header size in bytes */
 362     swab16s(&h->        e_phentsize);           /* Program header table entry size */
 363     swab16s(&h->        e_phnum);               /* Program header table entry count */
 364     swab16s(&h->        e_shentsize);           /* Section header table entry size */
 365     swab16s(&h->        e_shnum);               /* Section header table entry count */
 366     swab16s(&h->        e_shstrndx);            /* Section header string table index */
 367 }
 368
 369 void elf_swap_shdr(struct elf_shdr *h)
 370 {
 371   swab32s(&h->  sh_name);               /* Section name (string tbl index) */
 372   swab32s(&h->  sh_type);               /* Section type */
 373   swabls(&h->   sh_flags);              /* Section flags */
 374   swabls(&h->   sh_addr);               /* Section virtual addr at execution */
 375   swabls(&h->   sh_offset);             /* Section file offset */
 376   swabls(&h->   sh_size);               /* Section size in bytes */
 377   swab32s(&h->  sh_link);               /* Link to another section */
 378   swab32s(&h->  sh_info);               /* Additional section information */
 379   swabls(&h->   sh_addralign);          /* Section alignment */
 380   swabls(&h->   sh_entsize);            /* Entry size if section holds table */
 381 }
 382
 383 void elf_swap_phdr(struct elf_phdr *h)
 384 {
 385     swab32s(&h->p_type);                        /* Segment type */
 386     swabls(&h->p_offset);               /* Segment file offset */
 387     swabls(&h->p_vaddr);                /* Segment virtual address */
 388     swabls(&h->p_paddr);                /* Segment physical address */
 389     swabls(&h->p_filesz);               /* Segment size in file */
 390     swabls(&h->p_memsz);                /* Segment size in memory */
 391     swab32s(&h->p_flags);               /* Segment flags */
 392     swabls(&h->p_align);                /* Segment alignment */
 393 }
 394
 395 void elf_swap_rel(ELF_RELOC *rel)
 396 {
 397     swabls(&rel->r_offset);
 398     swabls(&rel->r_info);
 399 #ifdef ELF_USES_RELOCA
 400     swabls(&rel->r_addend);
 401 #endif
 402 }
 403
 404 struct elf_shdr *find_elf_section(struct elf_shdr *shdr, int shnum, const char *shstr,
 405                                   const char *name)
 406 {
 407     int i;
 408     const char *shname;
 409     struct elf_shdr *sec;
 410
 411     for(i = 0; i < shnum; i++) {
 412         sec = &shdr[i];
 413         if (!sec->sh_name)
 414             continue;
 415         shname = shstr + sec->sh_name;
 416         if (!strcmp(shname, name))
 417             return sec;
 418     }
 419     return NULL;
 420 }
 421
 422 int find_reloc(int sh_index)
 423 {
 424     struct elf_shdr *sec;
 425     int i;
 426
 427     for(i = 0; i < ehdr.e_shnum; i++) {
 428         sec = &shdr[i];
 429         if (sec->sh_type == SHT_RELOC && sec->sh_info == sh_index)
 430             return i;
 431     }
 432     return 0;
 433 }
 434
 435 static host_ulong get_rel_offset(EXE_RELOC *rel)
 436 {
 437     return rel->r_offset;
 438 }
 439
 440 static char *get_rel_sym_name(EXE_RELOC *rel)
 441 {
 442     return strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
 443 }
 444
 445 static char *get_sym_name(EXE_SYM *sym)
 446 {
 447     return strtab + sym->st_name;
 448 }
 449
 450 /* load an elf object file */
 451 int load_object(const char *filename)
 452 {
 453     int fd;
 454     struct elf_shdr *sec, *symtab_sec, *strtab_sec, *text_sec;
 455     int i, j;
 456     ElfW(Sym) *sym;
 457     char *shstr;
 458     ELF_RELOC *rel;
 459
 460     fd = open(filename, O_RDONLY);
 461     if (fd < 0)
 462         error("can't open file '%s'", filename);
 463
 464     /* Read ELF header.  */
 465     if (read(fd, &ehdr, sizeof (ehdr)) != sizeof (ehdr))
 466         error("unable to read file header");
 467
 468     /* Check ELF identification.  */
 469     if (ehdr.e_ident[EI_MAG0] != ELFMAG0
 470      || ehdr.e_ident[EI_MAG1] != ELFMAG1
 471      || ehdr.e_ident[EI_MAG2] != ELFMAG2
 472      || ehdr.e_ident[EI_MAG3] != ELFMAG3
 473      || ehdr.e_ident[EI_VERSION] != EV_CURRENT) {
 474         error("bad ELF header");
 475     }
 476
 477     do_swap = elf_must_swap(&ehdr);
 478     if (do_swap)
 479         elf_swap_ehdr(&ehdr);
 480     if (ehdr.e_ident[EI_CLASS] != ELF_CLASS)
 481         error("Unsupported ELF class");
 482     if (ehdr.e_type != ET_REL)
 483         error("ELF object file expected");
 484     if (ehdr.e_version != EV_CURRENT)
 485         error("Invalid ELF version");
 486     if (!elf_check_arch(ehdr.e_machine))
 487         error("Unsupported CPU (e_machine=%d)", ehdr.e_machine);
 488
 489     /* read section headers */
 490     shdr = load_data(fd, ehdr.e_shoff, ehdr.e_shnum * sizeof(struct elf_shdr));
 491     if (do_swap) {
 492         for(i = 0; i < ehdr.e_shnum; i++) {
 493             elf_swap_shdr(&shdr[i]);
 494         }
 495     }
 496
 497     /* read all section data */
 498     sdata = malloc(sizeof(void *) * ehdr.e_shnum);
 499     memset(sdata, 0, sizeof(void *) * ehdr.e_shnum);
 500
 501     for(i = 0;i < ehdr.e_shnum; i++) {
 502         sec = &shdr[i];
 503         if (sec->sh_type != SHT_NOBITS)
 504             sdata[i] = load_data(fd, sec->sh_offset, sec->sh_size);
 505     }
 506
 507     sec = &shdr[ehdr.e_shstrndx];
 508     shstr = sdata[ehdr.e_shstrndx];
 509
 510     /* swap relocations */
 511     for(i = 0; i < ehdr.e_shnum; i++) {
 512         sec = &shdr[i];
 513         if (sec->sh_type == SHT_RELOC) {
 514             nb_relocs = sec->sh_size / sec->sh_entsize;
 515             if (do_swap) {
 516                 for(j = 0, rel = (ELF_RELOC *)sdata[i]; j < nb_relocs; j++, rel++)
 517                     elf_swap_rel(rel);
 518             }
 519         }
 520     }
 521     /* text section */
 522
 523     text_sec = find_elf_section(shdr, ehdr.e_shnum, shstr, ".text");
 524     if (!text_sec)
 525         error("could not find .text section");
 526     text_shndx = text_sec - shdr;
 527     text = sdata[text_shndx];
 528
 529     /* find text relocations, if any */
 530     relocs = NULL;
 531     nb_relocs = 0;
 532     i = find_reloc(text_shndx);
 533     if (i != 0) {
 534         relocs = (ELF_RELOC *)sdata[i];
 535         nb_relocs = shdr[i].sh_size / shdr[i].sh_entsize;
 536     }
 537
 538     symtab_sec = find_elf_section(shdr, ehdr.e_shnum, shstr, ".symtab");
 539     if (!symtab_sec)
 540         error("could not find .symtab section");
 541     strtab_sec = &shdr[symtab_sec->sh_link];
 542
 543     symtab = (ElfW(Sym) *)sdata[symtab_sec - shdr];
 544     strtab = sdata[symtab_sec->sh_link];
 545
 546     nb_syms = symtab_sec->sh_size / sizeof(ElfW(Sym));
 547     if (do_swap) {
 548         for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
 549             swab32s(&sym->st_name);
 550             swabls(&sym->st_value);
 551             swabls(&sym->st_size);
 552             swab16s(&sym->st_shndx);
 553         }
 554     }
 555     close(fd);
 556     return 0;
 557 }
 558
 559 #endif /* CONFIG_FORMAT_ELF */
 560
 561 #ifdef CONFIG_FORMAT_COFF
 562
 563 /* COFF file info */
 564 struct external_scnhdr *shdr;
 565 uint8_t **sdata;
 566 struct external_filehdr fhdr;
 567 struct external_syment *coff_symtab;
 568 char *strtab;
 569 int coff_text_shndx, coff_data_shndx;
 570
 571 int data_shndx;
 572
 573 #define STRTAB_SIZE 4
 574
 575 #define DIR32   0x06
 576 #define DISP32  0x14
 577
 578 #define T_FUNCTION  0x20
 579 #define C_EXTERNAL  2
 580
 581 void sym_ent_name(struct external_syment *ext_sym, EXE_SYM *sym)
 582 {
 583     char *q;
 584     int c, i, len;
 585
 586     if (ext_sym->e.e.e_zeroes != 0) {
 587         q = sym->st_name;
 588         for(i = 0; i < 8; i++) {
 589             c = ext_sym->e.e_name[i];
 590             if (c == '\0')
 591                 break;
 592             *q++ = c;
 593         }
 594         *q = '\0';
 595     } else {
 596         pstrcpy(sym->st_name, sizeof(sym->st_name), strtab + ext_sym->e.e.e_offset);
 597     }
 598
 599     /* now convert the name to a C name (suppress the leading '_') */
 600     if (sym->st_name[0] == '_') {
 601         len = strlen(sym->st_name);
 602         memmove(sym->st_name, sym->st_name + 1, len - 1);
 603         sym->st_name[len - 1] = '\0';
 604     }
 605 }
 606
 607 char *name_for_dotdata(struct coff_rel *rel)
 608 {
 609         int i;
 610         struct coff_sym *sym;
 611         uint32_t text_data;
 612
 613         text_data = *(uint32_t *)(text + rel->r_offset);
 614
 615         for (i = 0, sym = symtab; i < nb_syms; i++, sym++) {
 616                 if (sym->st_syment->e_scnum == data_shndx &&
 617                     text_data >= sym->st_value &&
 618                     text_data < sym->st_value + sym->st_size) {
 619
 620                     return sym->st_name;
 621
 622                 }
 623         }
 624         return NULL;
 625 }
 626
 627 static char *get_sym_name(EXE_SYM *sym)
 628 {
 629     return sym->st_name;
 630 }
 631
 632 static char *get_rel_sym_name(EXE_RELOC *rel)
 633 {
 634     char *name;
 635     name = get_sym_name(symtab + *(uint32_t *)(rel->r_reloc->r_symndx));
 636     if (!strcmp(name, ".data"))
 637         name = name_for_dotdata(rel);
 638     if (name[0] == '.')
 639         return NULL;
 640     return name;
 641 }
 642
 643 static host_ulong get_rel_offset(EXE_RELOC *rel)
 644 {
 645     return rel->r_offset;
 646 }
 647
 648 struct external_scnhdr *find_coff_section(struct external_scnhdr *shdr, int shnum, const char *name)
 649 {
 650     int i;
 651     const char *shname;
 652     struct external_scnhdr *sec;
 653
 654     for(i = 0; i < shnum; i++) {
 655         sec = &shdr[i];
 656         if (!sec->s_name)
 657             continue;
 658         shname = sec->s_name;
 659         if (!strcmp(shname, name))
 660             return sec;
 661     }
 662     return NULL;
 663 }
 664
 665 /* load a coff object file */
 666 int load_object(const char *filename)
 667 {
 668     int fd;
 669     struct external_scnhdr *sec, *text_sec, *data_sec;
 670     int i;
 671     struct external_syment *ext_sym;
 672     struct external_reloc *coff_relocs;
 673     struct external_reloc *ext_rel;
 674     uint32_t *n_strtab;
 675     EXE_SYM *sym;
 676     EXE_RELOC *rel;
 677
 678     fd = open(filename, O_RDONLY
 679 #ifdef _WIN32
 680               | O_BINARY
 681 #endif
 682               );
 683     if (fd < 0)
 684         error("can't open file '%s'", filename);
 685
 686     /* Read COFF header.  */
 687     if (read(fd, &fhdr, sizeof (fhdr)) != sizeof (fhdr))
 688         error("unable to read file header");
 689
 690     /* Check COFF identification.  */
 691     if (fhdr.f_magic != I386MAGIC) {
 692         error("bad COFF header");
 693     }
 694     do_swap = 0;
 695
 696     /* read section headers */
 697     shdr = load_data(fd, sizeof(struct external_filehdr) + fhdr.f_opthdr, fhdr.f_nscns * sizeof(struct external_scnhdr));
 698
 699     /* read all section data */
 700     sdata = malloc(sizeof(void *) * fhdr.f_nscns);
 701     memset(sdata, 0, sizeof(void *) * fhdr.f_nscns);
 702
 703     const char *p;
 704     for(i = 0;i < fhdr.f_nscns; i++) {
 705         sec = &shdr[i];
 706         if (!strstart(sec->s_name,  ".bss", &p))
 707             sdata[i] = load_data(fd, sec->s_scnptr, sec->s_size);
 708     }
 709
 710
 711     /* text section */
 712     text_sec = find_coff_section(shdr, fhdr.f_nscns, ".text");
 713     if (!text_sec)
 714         error("could not find .text section");
 715     coff_text_shndx = text_sec - shdr;
 716     text = sdata[coff_text_shndx];
 717
 718     /* data section */
 719     data_sec = find_coff_section(shdr, fhdr.f_nscns, ".data");
 720     if (!data_sec)
 721         error("could not find .data section");
 722     coff_data_shndx = data_sec - shdr;
 723
 724     coff_symtab = load_data(fd, fhdr.f_symptr, fhdr.f_nsyms*SYMESZ);
 725     for (i = 0, ext_sym = coff_symtab; i < nb_syms; i++, ext_sym++) {
 726         for(i=0;i<8;i++)
 727             printf(" %02x", ((uint8_t *)ext_sym->e.e_name)[i]);
 728         printf("\n");
 729     }
 730
 731
 732     n_strtab = load_data(fd, (fhdr.f_symptr + fhdr.f_nsyms*SYMESZ), STRTAB_SIZE);
 733     strtab = load_data(fd, (fhdr.f_symptr + fhdr.f_nsyms*SYMESZ), *n_strtab);
 734
 735     nb_syms = fhdr.f_nsyms;
 736
 737     for (i = 0, ext_sym = coff_symtab; i < nb_syms; i++, ext_sym++) {
 738       if (strstart(ext_sym->e.e_name, ".text", NULL))
 739                   text_shndx = ext_sym->e_scnum;
 740           if (strstart(ext_sym->e.e_name, ".data", NULL))
 741                   data_shndx = ext_sym->e_scnum;
 742     }
 743
 744         /* set coff symbol */
 745         symtab = malloc(sizeof(struct coff_sym) * nb_syms);
 746
 747         int aux_size, j;
 748         for (i = 0, ext_sym = coff_symtab, sym = symtab; i < nb_syms; i++, ext_sym++, sym++) {
 749                 memset(sym, 0, sizeof(*sym));
 750                 sym->st_syment = ext_sym;
 751                 sym_ent_name(ext_sym, sym);
 752                 sym->st_value = ext_sym->e_value;
 753
 754                 aux_size = *(int8_t *)ext_sym->e_numaux;
 755                 if (ext_sym->e_scnum == text_shndx && ext_sym->e_type == T_FUNCTION) {
 756                         for (j = aux_size + 1; j < nb_syms - i; j++) {
 757                                 if ((ext_sym + j)->e_scnum == text_shndx &&
 758                                         (ext_sym + j)->e_type == T_FUNCTION ){
 759                                         sym->st_size = (ext_sym + j)->e_value - ext_sym->e_value;
 760                                         break;
 761                                 } else if (j == nb_syms - i - 1) {
 762                                         sec = &shdr[coff_text_shndx];
 763                                         sym->st_size = sec->s_size - ext_sym->e_value;
 764                                         break;
 765                                 }
 766                         }
 767                 } else if (ext_sym->e_scnum == data_shndx && *(uint8_t *)ext_sym->e_sclass == C_EXTERNAL) {
 768                         for (j = aux_size + 1; j < nb_syms - i; j++) {
 769                                 if ((ext_sym + j)->e_scnum == data_shndx) {
 770                                         sym->st_size = (ext_sym + j)->e_value - ext_sym->e_value;
 771                                         break;
 772                                 } else if (j == nb_syms - i - 1) {
 773                                         sec = &shdr[coff_data_shndx];
 774                                         sym->st_size = sec->s_size - ext_sym->e_value;
 775                                         break;
 776                                 }
 777                         }
 778                 } else {
 779                         sym->st_size = 0;
 780                 }
 781
 782                 sym->st_type = ext_sym->e_type;
 783                 sym->st_shndx = ext_sym->e_scnum;
 784         }
 785
 786
 787     /* find text relocations, if any */
 788     sec = &shdr[coff_text_shndx];
 789     coff_relocs = load_data(fd, sec->s_relptr, sec->s_nreloc*RELSZ);
 790     nb_relocs = sec->s_nreloc;
 791
 792     /* set coff relocation */
 793     relocs = malloc(sizeof(struct coff_rel) * nb_relocs);
 794     for (i = 0, ext_rel = coff_relocs, rel = relocs; i < nb_relocs;
 795          i++, ext_rel++, rel++) {
 796         memset(rel, 0, sizeof(*rel));
 797         rel->r_reloc = ext_rel;
 798         rel->r_offset = *(uint32_t *)ext_rel->r_vaddr;
 799         rel->r_type = *(uint16_t *)ext_rel->r_type;
 800     }
 801     return 0;
 802 }
 803
 804 #endif /* CONFIG_FORMAT_COFF */
 805
 806 #ifdef CONFIG_FORMAT_MACH
 807
 808 /* File Header */
 809 struct mach_header      mach_hdr;
 810
 811 /* commands */
 812 struct segment_command  *segment = 0;
 813 struct dysymtab_command *dysymtabcmd = 0;
 814 struct symtab_command   *symtabcmd = 0;
 815
 816 /* section */
 817 struct section  *section_hdr;
 818 struct section *text_sec_hdr;
 819 uint8_t         **sdata;
 820
 821 /* relocs */
 822 struct relocation_info *relocs;
 823
 824 /* symbols */
 825 EXE_SYM                 *symtab;
 826 struct nlist    *symtab_std;
 827 char                    *strtab;
 828
 829 /* indirect symbols */
 830 uint32_t        *tocdylib;
 831
 832 /* Utility functions */
 833
 834 static inline char *find_str_by_index(int index)
 835 {
 836     return strtab+index;
 837 }
 838
 839 /* Used by dyngen common code */
 840 static char *get_sym_name(EXE_SYM *sym)
 841 {
 842         char *name = find_str_by_index(sym->n_un.n_strx);
 843
 844         if ( sym->n_type & N_STAB ) /* Debug symbols are ignored */
 845                 return "debug";
 846
 847         if(!name)
 848                 return name;
 849         if(name[0]=='_')
 850                 return name + 1;
 851         else
 852                 return name;
 853 }
 854
 855 /* find a section index given its segname, sectname */
 856 static int find_mach_sec_index(struct section *section_hdr, int shnum, const char *segname,
 857                                   const char *sectname)
 858 {
 859     int i;
 860     struct section *sec = section_hdr;
 861
 862     for(i = 0; i < shnum; i++, sec++) {
 863         if (!sec->segname || !sec->sectname)
 864             continue;
 865         if (!strcmp(sec->sectname, sectname) && !strcmp(sec->segname, segname))
 866             return i;
 867     }
 868     return -1;
 869 }
 870
 871 /* find a section header given its segname, sectname */
 872 struct section *find_mach_sec_hdr(struct section *section_hdr, int shnum, const char *segname,
 873                                   const char *sectname)
 874 {
 875     int index = find_mach_sec_index(section_hdr, shnum, segname, sectname);
 876         if(index == -1)
 877                 return NULL;
 878         return section_hdr+index;
 879 }
 880
 881
 882 static inline void fetch_next_pair_value(struct relocation_info * rel, unsigned int *value)
 883 {
 884     struct scattered_relocation_info * scarel;
 885
 886     if(R_SCATTERED & rel->r_address) {
 887         scarel = (struct scattered_relocation_info*)rel;
 888         if(scarel->r_type != PPC_RELOC_PAIR)
 889             error("fetch_next_pair_value: looking for a pair which was not found (1)");
 890         *value = scarel->r_value;
 891     } else {
 892                 if(rel->r_type != PPC_RELOC_PAIR)
 893                         error("fetch_next_pair_value: looking for a pair which was not found (2)");
 894                 *value = rel->r_address;
 895         }
 896 }
 897
 898 /* find a sym name given its value, in a section number */
 899 static const char * find_sym_with_value_and_sec_number( int value, int sectnum, int * offset )
 900 {
 901         int i, ret = -1;
 902
 903         for( i = 0 ; i < nb_syms; i++ )
 904         {
 905             if( !(symtab[i].n_type & N_STAB) && (symtab[i].n_type & N_SECT) &&
 906                          (symtab[i].n_sect ==  sectnum) && (symtab[i].st_value <= value) )
 907                 {
 908                         if( (ret<0) || (symtab[i].st_value >= symtab[ret].st_value) )
 909                                 ret = i;
 910                 }
 911         }
 912         if( ret < 0 ) {
 913                 *offset = 0;
 914                 return 0;
 915         } else {
 916                 *offset = value - symtab[ret].st_value;
 917                 return get_sym_name(&symtab[ret]);
 918         }
 919 }
 920
 921 /*
 922  *  Find symbol name given a (virtual) address, and a section which is of type
 923  *  S_NON_LAZY_SYMBOL_POINTERS or S_LAZY_SYMBOL_POINTERS or S_SYMBOL_STUBS
 924  */
 925 static const char * find_reloc_name_in_sec_ptr(int address, struct section * sec_hdr)
 926 {
 927     unsigned int tocindex, symindex, size;
 928     const char *name = 0;
 929
 930     /* Sanity check */
 931     if(!( address >= sec_hdr->addr && address < (sec_hdr->addr + sec_hdr->size) ) )
 932         return (char*)0;
 933
 934         if( sec_hdr->flags & S_SYMBOL_STUBS ){
 935                 size = sec_hdr->reserved2;
 936                 if(size == 0)
 937                     error("size = 0");
 938
 939         }
 940         else if( sec_hdr->flags & S_LAZY_SYMBOL_POINTERS ||
 941                     sec_hdr->flags & S_NON_LAZY_SYMBOL_POINTERS)
 942                 size = sizeof(unsigned long);
 943         else
 944                 return 0;
 945
 946     /* Compute our index in toc */
 947         tocindex = (address - sec_hdr->addr)/size;
 948         symindex = tocdylib[sec_hdr->reserved1 + tocindex];
 949
 950         name = get_sym_name(&symtab[symindex]);
 951
 952     return name;
 953 }
 954
 955 static const char * find_reloc_name_given_its_address(int address)
 956 {
 957     unsigned int i;
 958     for(i = 0; i < segment->nsects ; i++)
 959     {
 960         const char * name = find_reloc_name_in_sec_ptr(address, &section_hdr[i]);
 961         if((long)name != -1)
 962             return name;
 963     }
 964     return 0;
 965 }
 966
 967 static const char * get_reloc_name(EXE_RELOC * rel, int * sslide)
 968 {
 969         char * name = 0;
 970         struct scattered_relocation_info * sca_rel = (struct scattered_relocation_info*)rel;
 971         int sectnum = rel->r_symbolnum;
 972         int sectoffset;
 973         int other_half=0;
 974
 975         /* init the slide value */
 976         *sslide = 0;
 977
 978         if(R_SCATTERED & rel->r_address)
 979                 return (char *)find_reloc_name_given_its_address(sca_rel->r_value);
 980
 981         if(rel->r_extern)
 982         {
 983                 /* ignore debug sym */
 984                 if ( symtab[rel->r_symbolnum].n_type & N_STAB )
 985                         return 0;
 986                 return get_sym_name(&symtab[rel->r_symbolnum]);
 987         }
 988
 989         /* Intruction contains an offset to the symbols pointed to, in the rel->r_symbolnum section */
 990         sectoffset = *(uint32_t *)(text + rel->r_address) & 0xffff;
 991
 992         if(sectnum==0xffffff)
 993                 return 0;
 994
 995         /* Sanity Check */
 996         if(sectnum > segment->nsects)
 997                 error("sectnum > segment->nsects");
 998
 999         switch(rel->r_type)
1000         {
1001                 case PPC_RELOC_LO16: fetch_next_pair_value(rel+1, &other_half); sectoffset |= (other_half << 16);
1002                         break;
1003                 case PPC_RELOC_HI16: fetch_next_pair_value(rel+1, &other_half); sectoffset = (sectoffset << 16) | (uint16_t)(other_half & 0xffff);
1004                         break;
1005                 case PPC_RELOC_HA16: fetch_next_pair_value(rel+1, &other_half); sectoffset = (sectoffset << 16) + (int16_t)(other_half & 0xffff);
1006                         break;
1007                 case PPC_RELOC_BR24:
1008                         sectoffset = ( *(uint32_t *)(text + rel->r_address) & 0x03fffffc );
1009                         if (sectoffset & 0x02000000) sectoffset |= 0xfc000000;
1010                         break;
1011                 default:
1012                         error("switch(rel->type) not found");
1013         }
1014
1015         if(rel->r_pcrel)
1016                 sectoffset += rel->r_address;
1017
1018         if (rel->r_type == PPC_RELOC_BR24)
1019                 name = (char *)find_reloc_name_in_sec_ptr((int)sectoffset, &section_hdr[sectnum-1]);
1020
1021         /* search it in the full symbol list, if not found */
1022         if(!name)
1023                 name = (char *)find_sym_with_value_and_sec_number(sectoffset, sectnum, sslide);
1024
1025         return name;
1026 }
1027
1028 /* Used by dyngen common code */
1029 static const char * get_rel_sym_name(EXE_RELOC * rel)
1030 {
1031         int sslide;
1032         return get_reloc_name( rel, &sslide);
1033 }
1034
1035 /* Used by dyngen common code */
1036 static host_ulong get_rel_offset(EXE_RELOC *rel)
1037 {
1038         struct scattered_relocation_info * sca_rel = (struct scattered_relocation_info*)rel;
1039     if(R_SCATTERED & rel->r_address)
1040                 return sca_rel->r_address;
1041         else
1042                 return rel->r_address;
1043 }
1044
1045 /* load a mach-o object file */
1046 int load_object(const char *filename)
1047 {
1048         int fd;
1049         unsigned int offset_to_segment = 0;
1050     unsigned int offset_to_dysymtab = 0;
1051     unsigned int offset_to_symtab = 0;
1052     struct load_command lc;
1053     unsigned int i, j;
1054         EXE_SYM *sym;
1055         struct nlist *syment;
1056
1057         fd = open(filename, O_RDONLY);
1058     if (fd < 0)
1059         error("can't open file '%s'", filename);
1060
1061     /* Read Mach header.  */
1062     if (read(fd, &mach_hdr, sizeof (mach_hdr)) != sizeof (mach_hdr))
1063         error("unable to read file header");
1064
1065     /* Check Mach identification.  */
1066     if (!check_mach_header(mach_hdr)) {
1067         error("bad Mach header");
1068     }
1069
1070     if (mach_hdr.cputype != CPU_TYPE_POWERPC)
1071         error("Unsupported CPU");
1072
1073     if (mach_hdr.filetype != MH_OBJECT)
1074         error("Unsupported Mach Object");
1075
1076     /* read segment headers */
1077     for(i=0, j=sizeof(mach_hdr); i<mach_hdr.ncmds ; i++)
1078     {
1079         if(read(fd, &lc, sizeof(struct load_command)) != sizeof(struct load_command))
1080             error("unable to read load_command");
1081         if(lc.cmd == LC_SEGMENT)
1082         {
1083             offset_to_segment = j;
1084             lseek(fd, offset_to_segment, SEEK_SET);
1085             segment = malloc(sizeof(struct segment_command));
1086             if(read(fd, segment, sizeof(struct segment_command)) != sizeof(struct segment_command))
1087                 error("unable to read LC_SEGMENT");
1088         }
1089         if(lc.cmd == LC_DYSYMTAB)
1090         {
1091             offset_to_dysymtab = j;
1092             lseek(fd, offset_to_dysymtab, SEEK_SET);
1093             dysymtabcmd = malloc(sizeof(struct dysymtab_command));
1094             if(read(fd, dysymtabcmd, sizeof(struct dysymtab_command)) != sizeof(struct dysymtab_command))
1095                 error("unable to read LC_DYSYMTAB");
1096         }
1097         if(lc.cmd == LC_SYMTAB)
1098         {
1099             offset_to_symtab = j;
1100             lseek(fd, offset_to_symtab, SEEK_SET);
1101             symtabcmd = malloc(sizeof(struct symtab_command));
1102             if(read(fd, symtabcmd, sizeof(struct symtab_command)) != sizeof(struct symtab_command))
1103                 error("unable to read LC_SYMTAB");
1104         }
1105         j+=lc.cmdsize;
1106
1107         lseek(fd, j, SEEK_SET);
1108     }
1109
1110     if(!segment)
1111         error("unable to find LC_SEGMENT");
1112
1113     /* read section headers */
1114     section_hdr = load_data(fd, offset_to_segment + sizeof(struct segment_command), segment->nsects * sizeof(struct section));
1115
1116     /* read all section data */
1117     sdata = (uint8_t **)malloc(sizeof(void *) * segment->nsects);
1118     memset(sdata, 0, sizeof(void *) * segment->nsects);
1119
1120         /* Load the data in section data */
1121         for(i = 0; i < segment->nsects; i++) {
1122         sdata[i] = load_data(fd, section_hdr[i].offset, section_hdr[i].size);
1123     }
1124
1125     /* text section */
1126         text_sec_hdr = find_mach_sec_hdr(section_hdr, segment->nsects, SEG_TEXT, SECT_TEXT);
1127         i = find_mach_sec_index(section_hdr, segment->nsects, SEG_TEXT, SECT_TEXT);
1128         if (i == -1 || !text_sec_hdr)
1129         error("could not find __TEXT,__text section");
1130     text = sdata[i];
1131
1132     /* Make sure dysym was loaded */
1133     if(!(int)dysymtabcmd)
1134         error("could not find __DYSYMTAB segment");
1135
1136     /* read the table of content of the indirect sym */
1137     tocdylib = load_data( fd, dysymtabcmd->indirectsymoff, dysymtabcmd->nindirectsyms * sizeof(uint32_t) );
1138
1139     /* Make sure symtab was loaded  */
1140     if(!(int)symtabcmd)
1141         error("could not find __SYMTAB segment");
1142     nb_syms = symtabcmd->nsyms;
1143
1144     symtab_std = load_data(fd, symtabcmd->symoff, symtabcmd->nsyms * sizeof(struct nlist));
1145     strtab = load_data(fd, symtabcmd->stroff, symtabcmd->strsize);
1146
1147         symtab = malloc(sizeof(EXE_SYM) * nb_syms);
1148
1149         /* Now transform the symtab, to an extended version, with the sym size, and the C name */
1150         for(i = 0, sym = symtab, syment = symtab_std; i < nb_syms; i++, sym++, syment++) {
1151         struct nlist *sym_follow, *sym_next = 0;
1152         unsigned int j;
1153                 memset(sym, 0, sizeof(*sym));
1154
1155                 if ( syment->n_type & N_STAB ) /* Debug symbols are skipped */
1156             continue;
1157
1158                 memcpy(sym, syment, sizeof(*syment));
1159
1160                 /* Find the following symbol in order to get the current symbol size */
1161         for(j = 0, sym_follow = symtab_std; j < nb_syms; j++, sym_follow++) {
1162             if ( sym_follow->n_sect != 1 || sym_follow->n_type & N_STAB || !(sym_follow->n_value > sym->st_value))
1163                 continue;
1164             if(!sym_next) {
1165                 sym_next = sym_follow;
1166                 continue;
1167             }
1168             if(!(sym_next->n_value > sym_follow->n_value))
1169                 continue;
1170             sym_next = sym_follow;
1171         }
1172                 if(sym_next)
1173             sym->st_size = sym_next->n_value - sym->st_value;
1174                 else
1175             sym->st_size = text_sec_hdr->size - sym->st_value;
1176         }
1177
1178     /* Find Reloc */
1179     relocs = load_data(fd, text_sec_hdr->reloff, text_sec_hdr->nreloc * sizeof(struct relocation_info));
1180     nb_relocs = text_sec_hdr->nreloc;
1181
1182         close(fd);
1183         return 0;
1184 }
1185
1186 #endif /* CONFIG_FORMAT_MACH */
1187
1188 void get_reloc_expr(char *name, int name_size, const char *sym_name)
1189 {
1190     const char *p;
1191
1192     if (strstart(sym_name, "__op_param", &p)) {
1193         snprintf(name, name_size, "param%s", p);
1194     } else if (strstart(sym_name, "__op_gen_label", &p)) {
1195         snprintf(name, name_size, "gen_labels[param%s]", p);
1196     } else {
1197 #ifdef HOST_SPARC
1198         if (sym_name[0] == '.')
1199             snprintf(name, name_size,
1200                      "(long)(&__dot_%s)",
1201                      sym_name + 1);
1202         else
1203 #endif
1204             snprintf(name, name_size, "(long)(&%s)", sym_name);
1205     }
1206 }
1207
1208 #ifdef HOST_IA64
1209
1210 #define PLT_ENTRY_SIZE  16      /* 1 bundle containing "brl" */
1211
1212 struct plt_entry {
1213     struct plt_entry *next;
1214     const char *name;
1215     unsigned long addend;
1216 } *plt_list;
1217
1218 static int
1219 get_plt_index (const char *name, unsigned long addend)
1220 {
1221     struct plt_entry *plt, *prev= NULL;
1222     int index = 0;
1223
1224     /* see if we already have an entry for this target: */
1225     for (plt = plt_list; plt; ++index, prev = plt, plt = plt->next)
1226         if (strcmp(plt->name, name) == 0 && plt->addend == addend)
1227             return index;
1228
1229     /* nope; create a new PLT entry: */
1230
1231     plt = malloc(sizeof(*plt));
1232     if (!plt) {
1233         perror("malloc");
1234         exit(1);
1235     }
1236     memset(plt, 0, sizeof(*plt));
1237     plt->name = strdup(name);
1238     plt->addend = addend;
1239
1240     /* append to plt-list: */
1241     if (prev)
1242         prev->next = plt;
1243     else
1244         plt_list = plt;
1245     return index;
1246 }
1247
1248 #endif
1249
1250 #ifdef HOST_ARM
1251
1252 int arm_emit_ldr_info(const char *name, unsigned long start_offset,
1253                       FILE *outfile, uint8_t *p_start, uint8_t *p_end,
1254                       ELF_RELOC *relocs, int nb_relocs)
1255 {
1256     uint8_t *p;
1257     uint32_t insn;
1258     int offset, min_offset, pc_offset, data_size;
1259     uint8_t data_allocated[1024];
1260     unsigned int data_index;
1261
1262     memset(data_allocated, 0, sizeof(data_allocated));
1263
1264     p = p_start;
1265     min_offset = p_end - p_start;
1266     while (p < p_start + min_offset) {
1267         insn = get32((uint32_t *)p);
1268         if ((insn & 0x0d5f0000) == 0x051f0000) {
1269             /* ldr reg, [pc, #im] */
1270             offset = insn & 0xfff;
1271             if (!(insn & 0x00800000))
1272                         offset = -offset;
1273             if ((offset & 3) !=0)
1274                 error("%s:%04x: ldr pc offset must be 32 bit aligned",
1275                       name, start_offset + p - p_start);
1276             pc_offset = p - p_start + offset + 8;
1277             if (pc_offset <= (p - p_start) ||
1278                 pc_offset >= (p_end - p_start))
1279                 error("%s:%04x: ldr pc offset must point inside the function code",
1280                       name, start_offset + p - p_start);
1281             if (pc_offset < min_offset)
1282                 min_offset = pc_offset;
1283             if (outfile) {
1284                 /* ldr position */
1285                 fprintf(outfile, "    arm_ldr_ptr->ptr = gen_code_ptr + %d;\n",
1286                         p - p_start);
1287                 /* ldr data index */
1288                 data_index = ((p_end - p_start) - pc_offset - 4) >> 2;
1289                 fprintf(outfile, "    arm_ldr_ptr->data_ptr = arm_data_ptr + %d;\n",
1290                         data_index);
1291                 fprintf(outfile, "    arm_ldr_ptr++;\n");
1292                 if (data_index >= sizeof(data_allocated))
1293                     error("%s: too many data", name);
1294                 if (!data_allocated[data_index]) {
1295                     ELF_RELOC *rel;
1296                     int i, addend, type;
1297                     const char *sym_name, *p;
1298                     char relname[1024];
1299
1300                     data_allocated[data_index] = 1;
1301
1302                     /* data value */
1303                     addend = get32((uint32_t *)(p_start + pc_offset));
1304                     relname[0] = '\0';
1305                     for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1306                         if (rel->r_offset == (pc_offset + start_offset)) {
1307                             sym_name = get_rel_sym_name(rel);
1308                             /* the compiler leave some unnecessary references to the code */
1309                             get_reloc_expr(relname, sizeof(relname), sym_name);
1310                             type = ELF32_R_TYPE(rel->r_info);
1311                             if (type != R_ARM_ABS32)
1312                                 error("%s: unsupported data relocation", name);
1313                             break;
1314                         }
1315                     }
1316                     fprintf(outfile, "    arm_data_ptr[%d] = 0x%x",
1317                             data_index, addend);
1318                     if (relname[0] != '\0')
1319                         fprintf(outfile, " + %s", relname);
1320                     fprintf(outfile, ";\n");
1321                 }
1322             }
1323         }
1324         p += 4;
1325     }
1326     data_size = (p_end - p_start) - min_offset;
1327     if (data_size > 0 && outfile) {
1328         fprintf(outfile, "    arm_data_ptr += %d;\n", data_size >> 2);
1329     }
1330
1331     /* the last instruction must be a mov pc, lr */
1332     if (p == p_start)
1333         goto arm_ret_error;
1334     p -= 4;
1335     insn = get32((uint32_t *)p);
1336     if ((insn & 0xffff0000) != 0xe91b0000) {
1337     arm_ret_error:
1338         if (!outfile)
1339             printf("%s: invalid epilog\n", name);
1340     }
1341     return p - p_start;
1342 }
1343 #endif
1344
1345
1346 #define MAX_ARGS 3
1347
1348 /* generate op code */
1349 void gen_code(const char *name, host_ulong offset, host_ulong size,
1350               FILE *outfile, int gen_switch)
1351 {
1352     int copy_size = 0;
1353     uint8_t *p_start, *p_end;
1354     host_ulong start_offset;
1355     int nb_args, i, n;
1356     uint8_t args_present[MAX_ARGS];
1357     const char *sym_name, *p;
1358     EXE_RELOC *rel;
1359
1360     /* Compute exact size excluding prologue and epilogue instructions.
1361      * Increment start_offset to skip epilogue instructions, then compute
1362      * copy_size the indicate the size of the remaining instructions (in
1363      * bytes).
1364      */
1365     p_start = text + offset;
1366     p_end = p_start + size;
1367     start_offset = offset;
1368 #if defined(HOST_I386) || defined(HOST_X86_64)
1369 #ifdef CONFIG_FORMAT_COFF
1370     {
1371         uint8_t *p;
1372         p = p_end - 1;
1373         if (p == p_start)
1374             error("empty code for %s", name);
1375         while (*p != 0xc3) {
1376             p--;
1377             if (p <= p_start)
1378                 error("ret or jmp expected at the end of %s", name);
1379         }
1380         copy_size = p - p_start;
1381     }
1382 #else
1383     {
1384         int len;
1385         len = p_end - p_start;
1386         if (len == 0)
1387             error("empty code for %s", name);
1388         if (p_end[-1] == 0xc3) {
1389             len--;
1390         } else {
1391             error("ret or jmp expected at the end of %s", name);
1392         }
1393         copy_size = len;
1394     }
1395 #endif
1396 #elif defined(HOST_PPC)
1397     {
1398         uint8_t *p;
1399         p = (void *)(p_end - 4);
1400         if (p == p_start)
1401             error("empty code for %s", name);
1402         if (get32((uint32_t *)p) != 0x4e800020)
1403             error("blr expected at the end of %s", name);
1404         copy_size = p - p_start;
1405     }
1406 #elif defined(HOST_S390)
1407     {
1408         uint8_t *p;
1409         p = (void *)(p_end - 2);
1410         if (p == p_start)
1411             error("empty code for %s", name);
1412         if (get16((uint16_t *)p) != 0x07fe && get16((uint16_t *)p) != 0x07f4)
1413             error("br %%r14 expected at the end of %s", name);
1414         copy_size = p - p_start;
1415     }
1416 #elif defined(HOST_ALPHA)
1417     {
1418         uint8_t *p;
1419         p = p_end - 4;
1420 #if 0
1421         /* XXX: check why it occurs */
1422         if (p == p_start)
1423             error("empty code for %s", name);
1424 #endif
1425         if (get32((uint32_t *)p) != 0x6bfa8001)
1426             error("ret expected at the end of %s", name);
1427         copy_size = p - p_start;
1428     }
1429 #elif defined(HOST_IA64)
1430     {
1431         uint8_t *p;
1432         p = (void *)(p_end - 4);
1433         if (p == p_start)
1434             error("empty code for %s", name);
1435         /* br.ret.sptk.many b0;; */
1436         /* 08 00 84 00 */
1437         if (get32((uint32_t *)p) != 0x00840008)
1438             error("br.ret.sptk.many b0;; expected at the end of %s", name);
1439         copy_size = p_end - p_start;
1440     }
1441 #elif defined(HOST_SPARC)
1442     {
1443         uint32_t start_insn, end_insn1, end_insn2;
1444         uint8_t *p;
1445         p = (void *)(p_end - 8);
1446         if (p <= p_start)
1447             error("empty code for %s", name);
1448         start_insn = get32((uint32_t *)(p_start + 0x0));
1449         end_insn1 = get32((uint32_t *)(p + 0x0));
1450         end_insn2 = get32((uint32_t *)(p + 0x4));
1451         if ((start_insn & ~0x1fff) == 0x9de3a000) {
1452             p_start += 0x4;
1453             start_offset += 0x4;
1454             if ((int)(start_insn | ~0x1fff) < -128)
1455                 error("Found bogus save at the start of %s", name);
1456             if (end_insn1 != 0x81c7e008 || end_insn2 != 0x81e80000)
1457                 error("ret; restore; not found at end of %s", name);
1458         } else {
1459             error("No save at the beginning of %s", name);
1460         }
1461 #if 0
1462         /* Skip a preceeding nop, if present.  */
1463         if (p > p_start) {
1464             skip_insn = get32((uint32_t *)(p - 0x4));
1465             if (skip_insn == 0x01000000)
1466                 p -= 4;
1467         }
1468 #endif
1469         copy_size = p - p_start;
1470     }
1471 #elif defined(HOST_SPARC64)
1472     {
1473         uint32_t start_insn, end_insn1, end_insn2, skip_insn;
1474         uint8_t *p;
1475         p = (void *)(p_end - 8);
1476         if (p <= p_start)
1477             error("empty code for %s", name);
1478         start_insn = get32((uint32_t *)(p_start + 0x0));
1479         end_insn1 = get32((uint32_t *)(p + 0x0));
1480         end_insn2 = get32((uint32_t *)(p + 0x4));
1481         if ((start_insn & ~0x1fff) == 0x9de3a000) {
1482             p_start += 0x4;
1483             start_offset += 0x4;
1484             if ((int)(start_insn | ~0x1fff) < -256)
1485                 error("Found bogus save at the start of %s", name);
1486             if (end_insn1 != 0x81c7e008 || end_insn2 != 0x81e80000)
1487                 error("ret; restore; not found at end of %s", name);
1488         } else {
1489             error("No save at the beginning of %s", name);
1490         }
1491
1492         /* Skip a preceeding nop, if present.  */
1493         if (p > p_start) {
1494             skip_insn = get32((uint32_t *)(p - 0x4));
1495             if (skip_insn == 0x01000000)
1496                 p -= 4;
1497         }
1498
1499         copy_size = p - p_start;
1500     }
1501 #elif defined(HOST_ARM)
1502     {
1503         if ((p_end - p_start) <= 16)
1504             error("%s: function too small", name);
1505         if (get32((uint32_t *)p_start) != 0xe1a0c00d ||
1506             (get32((uint32_t *)(p_start + 4)) & 0xffff0000) != 0xe92d0000 ||
1507             get32((uint32_t *)(p_start + 8)) != 0xe24cb004)
1508             error("%s: invalid prolog", name);
1509         p_start += 12;
1510         start_offset += 12;
1511         copy_size = arm_emit_ldr_info(name, start_offset, NULL, p_start, p_end,
1512                                       relocs, nb_relocs);
1513     }
1514 #elif defined(HOST_M68K)
1515     {
1516         uint8_t *p;
1517         p = (void *)(p_end - 2);
1518         if (p == p_start)
1519             error("empty code for %s", name);
1520         // remove NOP's, probably added for alignment
1521         while ((get16((uint16_t *)p) == 0x4e71) &&
1522                (p>p_start))
1523             p -= 2;
1524         if (get16((uint16_t *)p) != 0x4e75)
1525             error("rts expected at the end of %s", name);
1526         copy_size = p - p_start;
1527     }
1528 #else
1529 #error unsupported CPU
1530 #endif
1531
1532     /* compute the number of arguments by looking at the relocations */
1533     for(i = 0;i < MAX_ARGS; i++)
1534         args_present[i] = 0;
1535
1536     for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1537         host_ulong offset = get_rel_offset(rel);
1538         if (offset >= start_offset &&
1539             offset < start_offset + (p_end - p_start)) {
1540             sym_name = get_rel_sym_name(rel);
1541             if(!sym_name)
1542                 continue;
1543             if (strstart(sym_name, "__op_param", &p) ||
1544                 strstart(sym_name, "__op_gen_label", &p)) {
1545                 n = strtoul(p, NULL, 10);
1546                 if (n > MAX_ARGS)
1547                     error("too many arguments in %s", name);
1548                 args_present[n - 1] = 1;
1549             }
1550         }
1551     }
1552
1553     nb_args = 0;
1554     while (nb_args < MAX_ARGS && args_present[nb_args])
1555         nb_args++;
1556     for(i = nb_args; i < MAX_ARGS; i++) {
1557         if (args_present[i])
1558             error("inconsistent argument numbering in %s", name);
1559     }
1560
1561     if (gen_switch == 2) {
1562         fprintf(outfile, "DEF(%s, %d, %d)\n", name + 3, nb_args, copy_size);
1563     } else if (gen_switch == 1) {
1564
1565         /* output C code */
1566         fprintf(outfile, "case INDEX_%s: {\n", name);
1567         if (nb_args > 0) {
1568             fprintf(outfile, "    long ");
1569             for(i = 0; i < nb_args; i++) {
1570                 if (i != 0)
1571                     fprintf(outfile, ", ");
1572                 fprintf(outfile, "param%d", i + 1);
1573             }
1574             fprintf(outfile, ";\n");
1575         }
1576 #if defined(HOST_IA64)
1577         fprintf(outfile, "    extern char %s;\n", name);
1578 #else
1579         fprintf(outfile, "    extern void %s();\n", name);
1580 #endif
1581
1582         for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1583             host_ulong offset = get_rel_offset(rel);
1584             if (offset >= start_offset &&
1585                 offset < start_offset + (p_end - p_start)) {
1586                 sym_name = get_rel_sym_name(rel);
1587                 if(!sym_name)
1588                     continue;
1589                 if (*sym_name &&
1590                     !strstart(sym_name, "__op_param", NULL) &&
1591                     !strstart(sym_name, "__op_jmp", NULL) &&
1592                     !strstart(sym_name, "__op_gen_label", NULL)) {
1593 #if defined(HOST_SPARC)
1594                     if (sym_name[0] == '.') {
1595                         fprintf(outfile,
1596                                 "extern char __dot_%s __asm__(\"%s\");\n",
1597                                 sym_name+1, sym_name);
1598                         continue;
1599                     }
1600 #endif
1601 #if defined(__APPLE__)
1602 /* set __attribute((unused)) on darwin because we wan't to avoid warning when we don't use the symbol */
1603                     fprintf(outfile, "extern char %s __attribute__((unused));\n", sym_name);
1604 #elif defined(HOST_IA64)
1605                         if (ELF64_R_TYPE(rel->r_info) != R_IA64_PCREL21B)
1606                                 /*
1607                                  * PCREL21 br.call targets generally
1608                                  * are out of range and need to go
1609                                  * through an "import stub".
1610                                  */
1611                                 fprintf(outfile, "    extern char %s;\n",
1612                                         sym_name);
1613 #else
1614                     fprintf(outfile, "extern char %s;\n", sym_name);
1615 #endif
1616                 }
1617             }
1618         }
1619
1620         fprintf(outfile, "    memcpy(gen_code_ptr, (void *)((char *)&%s+%d), %d);\n",
1621                                         name, (int)(start_offset - offset), copy_size);
1622
1623         /* emit code offset information */
1624         {
1625             EXE_SYM *sym;
1626             const char *sym_name, *p;
1627             unsigned long val;
1628             int n;
1629
1630             for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
1631                 sym_name = get_sym_name(sym);
1632                 if (strstart(sym_name, "__op_label", &p)) {
1633                     uint8_t *ptr;
1634                     unsigned long offset;
1635
1636                     /* test if the variable refers to a label inside
1637                        the code we are generating */
1638 #ifdef CONFIG_FORMAT_COFF
1639                     if (sym->st_shndx == text_shndx) {
1640                         ptr = sdata[coff_text_shndx];
1641                     } else if (sym->st_shndx == data_shndx) {
1642                         ptr = sdata[coff_data_shndx];
1643                     } else {
1644                         ptr = NULL;
1645                     }
1646 #elif defined(CONFIG_FORMAT_MACH)
1647                     if(!sym->n_sect)
1648                         continue;
1649                     ptr = sdata[sym->n_sect-1];
1650 #else
1651                     ptr = sdata[sym->st_shndx];
1652 #endif
1653                     if (!ptr)
1654                         error("__op_labelN in invalid section");
1655                     offset = sym->st_value;
1656 #ifdef CONFIG_FORMAT_MACH
1657                     offset -= section_hdr[sym->n_sect-1].addr;
1658 #endif
1659                     val = *(unsigned long *)(ptr + offset);
1660 #ifdef ELF_USES_RELOCA
1661                     {
1662                         int reloc_shndx, nb_relocs1, j;
1663
1664                         /* try to find a matching relocation */
1665                         reloc_shndx = find_reloc(sym->st_shndx);
1666                         if (reloc_shndx) {
1667                             nb_relocs1 = shdr[reloc_shndx].sh_size /
1668                                 shdr[reloc_shndx].sh_entsize;
1669                             rel = (ELF_RELOC *)sdata[reloc_shndx];
1670                             for(j = 0; j < nb_relocs1; j++) {
1671                                 if (rel->r_offset == offset) {
1672                                     val = rel->r_addend;
1673                                     break;
1674                                 }
1675                                 rel++;
1676                             }
1677                         }
1678                     }
1679 #endif
1680                     if (val >= start_offset && val <= start_offset + copy_size) {
1681                         n = strtol(p, NULL, 10);
1682                         fprintf(outfile, "    label_offsets[%d] = %ld + (gen_code_ptr - gen_code_buf);\n", n, (long)(val - start_offset));
1683                     }
1684                 }
1685             }
1686         }
1687
1688         /* load parameres in variables */
1689         for(i = 0; i < nb_args; i++) {
1690             fprintf(outfile, "    param%d = *opparam_ptr++;\n", i + 1);
1691         }
1692
1693         /* patch relocations */
1694 #if defined(HOST_I386)
1695             {
1696                 char name[256];
1697                 int type;
1698                 int addend;
1699                 int reloc_offset;
1700                 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1701                 if (rel->r_offset >= start_offset &&
1702                     rel->r_offset < start_offset + copy_size) {
1703                     sym_name = get_rel_sym_name(rel);
1704                     if (!sym_name)
1705                         continue;
1706                     reloc_offset = rel->r_offset - start_offset;
1707                     if (strstart(sym_name, "__op_jmp", &p)) {
1708                         int n;
1709                         n = strtol(p, NULL, 10);
1710                         /* __op_jmp relocations are done at
1711                            runtime to do translated block
1712                            chaining: the offset of the instruction
1713                            needs to be stored */
1714                         fprintf(outfile, "    jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
1715                                 n, reloc_offset);
1716                         continue;
1717                     }
1718
1719                     get_reloc_expr(name, sizeof(name), sym_name);
1720                     addend = get32((uint32_t *)(text + rel->r_offset));
1721 #ifdef CONFIG_FORMAT_ELF
1722                     type = ELF32_R_TYPE(rel->r_info);
1723                     switch(type) {
1724                     case R_386_32:
1725                         fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
1726                                 reloc_offset, name, addend);
1727                         break;
1728                     case R_386_PC32:
1729                         fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d;\n",
1730                                 reloc_offset, name, reloc_offset, addend);
1731                         break;
1732                     default:
1733                         error("unsupported i386 relocation (%d)", type);
1734                     }
1735 #elif defined(CONFIG_FORMAT_COFF)
1736                     {
1737                         char *temp_name;
1738                         int j;
1739                         EXE_SYM *sym;
1740                         temp_name = get_sym_name(symtab + *(uint32_t *)(rel->r_reloc->r_symndx));
1741                         if (!strcmp(temp_name, ".data")) {
1742                             for (j = 0, sym = symtab; j < nb_syms; j++, sym++) {
1743                                 if (strstart(sym->st_name, sym_name, NULL)) {
1744                                     addend -= sym->st_value;
1745                                 }
1746                             }
1747                         }
1748                     }
1749                     type = rel->r_type;
1750                     switch(type) {
1751                     case DIR32:
1752                         fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
1753                                 reloc_offset, name, addend);
1754                         break;
1755                     case DISP32:
1756                         fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d -4;\n",
1757                                 reloc_offset, name, reloc_offset, addend);
1758                         break;
1759                     default:
1760                         error("unsupported i386 relocation (%d)", type);
1761                     }
1762 #else
1763 #error unsupport object format
1764 #endif
1765                 }
1766                 }
1767             }
1768 #elif defined(HOST_X86_64)
1769             {
1770                 char name[256];
1771                 int type;
1772                 int addend;
1773                 int reloc_offset;
1774                 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1775                 if (rel->r_offset >= start_offset &&
1776                     rel->r_offset < start_offset + copy_size) {
1777                     sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
1778                     get_reloc_expr(name, sizeof(name), sym_name);
1779                     type = ELF32_R_TYPE(rel->r_info);
1780                     addend = rel->r_addend;
1781                     reloc_offset = rel->r_offset - start_offset;
1782                     switch(type) {
1783                     case R_X86_64_32:
1784                         fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = (uint32_t)%s + %d;\n",
1785                                 reloc_offset, name, addend);
1786                         break;
1787                     case R_X86_64_32S:
1788                         fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = (int32_t)%s + %d;\n",
1789                                 reloc_offset, name, addend);
1790                         break;
1791                     case R_X86_64_PC32:
1792                         fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d;\n",
1793                                 reloc_offset, name, reloc_offset, addend);
1794                         break;
1795                     default:
1796                         error("unsupported X86_64 relocation (%d)", type);
1797                     }
1798                 }
1799                 }
1800             }
1801 #elif defined(HOST_PPC)
1802             {
1803 #ifdef CONFIG_FORMAT_ELF
1804                 char name[256];
1805                 int type;
1806                 int addend;
1807                 int reloc_offset;
1808                 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1809                     if (rel->r_offset >= start_offset &&
1810                         rel->r_offset < start_offset + copy_size) {
1811                         sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
1812                         reloc_offset = rel->r_offset - start_offset;
1813                         if (strstart(sym_name, "__op_jmp", &p)) {
1814                             int n;
1815                             n = strtol(p, NULL, 10);
1816                             /* __op_jmp relocations are done at
1817                                runtime to do translated block
1818                                chaining: the offset of the instruction
1819                                needs to be stored */
1820                             fprintf(outfile, "    jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
1821                                     n, reloc_offset);
1822                             continue;
1823                         }
1824
1825                         get_reloc_expr(name, sizeof(name), sym_name);
1826                         type = ELF32_R_TYPE(rel->r_info);
1827                         addend = rel->r_addend;
1828                         switch(type) {
1829                         case R_PPC_ADDR32:
1830                             fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
1831                                     reloc_offset, name, addend);
1832                             break;
1833                         case R_PPC_ADDR16_LO:
1834                             fprintf(outfile, "    *(uint16_t *)(gen_code_ptr + %d) = (%s + %d);\n",
1835                                     reloc_offset, name, addend);
1836                             break;
1837                         case R_PPC_ADDR16_HI:
1838                             fprintf(outfile, "    *(uint16_t *)(gen_code_ptr + %d) = (%s + %d) >> 16;\n",
1839                                     reloc_offset, name, addend);
1840                             break;
1841                         case R_PPC_ADDR16_HA:
1842                             fprintf(outfile, "    *(uint16_t *)(gen_code_ptr + %d) = (%s + %d + 0x8000) >> 16;\n",
1843                                     reloc_offset, name, addend);
1844                             break;
1845                         case R_PPC_REL24:
1846                             /* warning: must be at 32 MB distancy */
1847                             fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | ((%s - (long)(gen_code_ptr + %d) + %d) & 0x03fffffc);\n",
1848                                     reloc_offset, reloc_offset, name, reloc_offset, addend);
1849                             break;
1850                         default:
1851                             error("unsupported powerpc relocation (%d)", type);
1852                         }
1853                     }
1854                 }
1855 #elif defined(CONFIG_FORMAT_MACH)
1856                                 struct scattered_relocation_info *scarel;
1857                                 struct relocation_info * rel;
1858                                 char final_sym_name[256];
1859                                 const char *sym_name;
1860                                 const char *p;
1861                                 int slide, sslide;
1862                                 int i;
1863
1864                                 for(i = 0, rel = relocs; i < nb_relocs; i++, rel++) {
1865                                         unsigned int offset, length, value = 0;
1866                                         unsigned int type, pcrel, isym = 0;
1867                                         unsigned int usesym = 0;
1868
1869                                         if(R_SCATTERED & rel->r_address) {
1870                                                 scarel = (struct scattered_relocation_info*)rel;
1871                                                 offset = (unsigned int)scarel->r_address;
1872                                                 length = scarel->r_length;
1873                                                 pcrel = scarel->r_pcrel;
1874                                                 type = scarel->r_type;
1875                                                 value = scarel->r_value;
1876                                         } else {
1877                                                 value = isym = rel->r_symbolnum;
1878                                                 usesym = (rel->r_extern);
1879                                                 offset = rel->r_address;
1880                                                 length = rel->r_length;
1881                                                 pcrel = rel->r_pcrel;
1882                                                 type = rel->r_type;
1883                                         }
1884
1885                                         slide = offset - start_offset;
1886
1887                                         if (!(offset >= start_offset && offset < start_offset + size))
1888                                                 continue;  /* not in our range */
1889
1890                                         sym_name = get_reloc_name(rel, &sslide);
1891
1892                                         if(usesym && symtab[isym].n_type & N_STAB)
1893                                                 continue; /* don't handle STAB (debug sym) */
1894
1895                                         if (sym_name && strstart(sym_name, "__op_jmp", &p)) {
1896                                                 int n;
1897                                                 n = strtol(p, NULL, 10);
1898                                                 fprintf(outfile, "    jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
1899                                                         n, slide);
1900                                                 continue; /* Nothing more to do */
1901                                         }
1902
1903                                         if(!sym_name)
1904                                         {
1905                                                 fprintf(outfile, "/* #warning relocation not handled in %s (value 0x%x, %s, offset 0x%x, length 0x%x, %s, type 0x%x) */\n",
1906                                                            name, value, usesym ? "use sym" : "don't use sym", offset, length, pcrel ? "pcrel":"", type);
1907                                                 continue; /* dunno how to handle without final_sym_name */
1908                                         }
1909
1910                                         get_reloc_expr(final_sym_name, sizeof(final_sym_name),
1911                                                        sym_name);
1912                                         switch(type) {
1913                                         case PPC_RELOC_BR24:
1914                                             if (!strstart(sym_name,"__op_gen_label",&p)) {
1915                                                 fprintf(outfile, "{\n");
1916                                                 fprintf(outfile, "    uint32_t imm = *(uint32_t *)(gen_code_ptr + %d) & 0x3fffffc;\n", slide);
1917                                                 fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | ((imm + ((long)%s - (long)gen_code_ptr) + %d) & 0x03fffffc);\n",
1918                                                                                         slide, slide, name, sslide );
1919                                                 fprintf(outfile, "}\n");
1920                                         } else {
1921                                                         fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | (((long)%s - (long)gen_code_ptr - %d) & 0x03fffffc);\n",
1922                                                                                         slide, slide, final_sym_name, slide);
1923                                         }
1924                                                 break;
1925                                         case PPC_RELOC_HI16:
1926                                                 fprintf(outfile, "    *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d) >> 16;\n",
1927                                                         slide, final_sym_name, sslide);
1928                                                 break;
1929                                         case PPC_RELOC_LO16:
1930                                                 fprintf(outfile, "    *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d);\n",
1931                                         slide, final_sym_name, sslide);
1932                             break;
1933                                         case PPC_RELOC_HA16:
1934                                                 fprintf(outfile, "    *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d + 0x8000) >> 16;\n",
1935                                                         slide, final_sym_name, sslide);
1936                                                 break;
1937                                 default:
1938                                         error("unsupported powerpc relocation (%d)", type);
1939                                 }
1940                         }
1941 #else
1942 #error unsupport object format
1943 #endif
1944             }
1945 #elif defined(HOST_S390)
1946             {
1947                 char name[256];
1948                 int type;
1949                 int addend;
1950                 int reloc_offset;
1951                 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1952                     if (rel->r_offset >= start_offset &&
1953                         rel->r_offset < start_offset + copy_size) {
1954                         sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
1955                         get_reloc_expr(name, sizeof(name), sym_name);
1956                         type = ELF32_R_TYPE(rel->r_info);
1957                         addend = rel->r_addend;
1958                         reloc_offset = rel->r_offset - start_offset;
1959                         switch(type) {
1960                         case R_390_32:
1961                             fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
1962                                     reloc_offset, name, addend);
1963                             break;
1964                         case R_390_16:
1965                             fprintf(outfile, "    *(uint16_t *)(gen_code_ptr + %d) = %s + %d;\n",
1966                                     reloc_offset, name, addend);
1967                             break;
1968                         case R_390_8:
1969                             fprintf(outfile, "    *(uint8_t *)(gen_code_ptr + %d) = %s + %d;\n",
1970                                     reloc_offset, name, addend);
1971                             break;
1972                         default:
1973                             error("unsupported s390 relocation (%d)", type);
1974                         }
1975                     }
1976                 }
1977             }
1978 #elif defined(HOST_ALPHA)
1979             {
1980                 for (i = 0, rel = relocs; i < nb_relocs; i++, rel++) {
1981                     if (rel->r_offset >= start_offset && rel->r_offset < start_offset + copy_size) {
1982                         int type;
1983                         long reloc_offset;
1984
1985                         type = ELF64_R_TYPE(rel->r_info);
1986                         sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name;
1987                         reloc_offset = rel->r_offset - start_offset;
1988                         switch (type) {
1989                         case R_ALPHA_GPDISP:
1990                             /* The gp is just 32 bit, and never changes, so it's easiest to emit it
1991                                as an immediate instead of constructing it from the pv or ra.  */
1992                             fprintf(outfile, "    immediate_ldah(gen_code_ptr + %ld, gp);\n",
1993                                     reloc_offset);
1994                             fprintf(outfile, "    immediate_lda(gen_code_ptr + %ld, gp);\n",
1995                                     reloc_offset + (int)rel->r_addend);
1996                             break;
1997                         case R_ALPHA_LITUSE:
1998                             /* jsr to literal hint. Could be used to optimize to bsr. Ignore for
1999                                now, since some called functions (libc) need pv to be set up.  */
2000                             break;
2001                         case R_ALPHA_HINT:
2002                             /* Branch target prediction hint. Ignore for now.  Should be already
2003                                correct for in-function jumps.  */
2004                             break;
2005                         case R_ALPHA_LITERAL:
2006                             /* Load a literal from the GOT relative to the gp.  Since there's only a
2007                                single gp, nothing is to be done.  */
2008                             break;
2009                         case R_ALPHA_GPRELHIGH:
2010                             /* Handle fake relocations against __op_param symbol.  Need to emit the
2011                                high part of the immediate value instead.  Other symbols need no
2012                                special treatment.  */
2013                             if (strstart(sym_name, "__op_param", &p))
2014                                 fprintf(outfile, "    immediate_ldah(gen_code_ptr + %ld, param%s);\n",
2015                                         reloc_offset, p);
2016                             break;
2017                         case R_ALPHA_GPRELLOW:
2018                             if (strstart(sym_name, "__op_param", &p))
2019                                 fprintf(outfile, "    immediate_lda(gen_code_ptr + %ld, param%s);\n",
2020                                         reloc_offset, p);
2021                             break;
2022                         case R_ALPHA_BRSGP:
2023                             /* PC-relative jump. Tweak offset to skip the two instructions that try to
2024                                set up the gp from the pv.  */
2025                             fprintf(outfile, "    fix_bsr(gen_code_ptr + %ld, (uint8_t *) &%s - (gen_code_ptr + %ld + 4) + 8);\n",
2026                                     reloc_offset, sym_name, reloc_offset);
2027                             break;
2028                         default:
2029                             error("unsupported Alpha relocation (%d)", type);
2030                         }
2031                     }
2032                 }
2033             }
2034 #elif defined(HOST_IA64)
2035             {
2036                 unsigned long sym_idx;
2037                 long code_offset;
2038                 char name[256];
2039                 int type;
2040                 long addend;
2041
2042                 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2043                     sym_idx = ELF64_R_SYM(rel->r_info);
2044                     if (rel->r_offset < start_offset
2045                         || rel->r_offset >= start_offset + copy_size)
2046                         continue;
2047                     sym_name = (strtab + symtab[sym_idx].st_name);
2048                     code_offset = rel->r_offset - start_offset;
2049                     if (strstart(sym_name, "__op_jmp", &p)) {
2050                         int n;
2051                         n = strtol(p, NULL, 10);
2052                         /* __op_jmp relocations are done at
2053                            runtime to do translated block
2054                            chaining: the offset of the instruction
2055                            needs to be stored */
2056                         fprintf(outfile, "    jmp_offsets[%d] ="
2057                                 "%ld + (gen_code_ptr - gen_code_buf);\n",
2058                                 n, code_offset);
2059                         continue;
2060                     }
2061                     get_reloc_expr(name, sizeof(name), sym_name);
2062                     type = ELF64_R_TYPE(rel->r_info);
2063                     addend = rel->r_addend;
2064                     switch(type) {
2065                       case R_IA64_IMM64:
2066                           fprintf(outfile,
2067                                   "    ia64_imm64(gen_code_ptr + %ld, "
2068                                   "%s + %ld);\n",
2069                                   code_offset, name, addend);
2070                           break;
2071                       case R_IA64_LTOFF22X:
2072                       case R_IA64_LTOFF22:
2073                           fprintf(outfile, "    IA64_LTOFF(gen_code_ptr + %ld,"
2074                                   " %s + %ld, %d);\n",
2075                                   code_offset, name, addend,
2076                                   (type == R_IA64_LTOFF22X));
2077                           break;
2078                       case R_IA64_LDXMOV:
2079                           fprintf(outfile,
2080                                   "    ia64_ldxmov(gen_code_ptr + %ld,"
2081                                   " %s + %ld);\n", code_offset, name, addend);
2082                           break;
2083
2084                       case R_IA64_PCREL21B:
2085                           if (strstart(sym_name, "__op_gen_label", NULL)) {
2086                               fprintf(outfile,
2087                                       "    ia64_imm21b(gen_code_ptr + %ld,"
2088                                       " (long) (%s + %ld -\n\t\t"
2089                                       "((long) gen_code_ptr + %ld)) >> 4);\n",
2090                                       code_offset, name, addend,
2091                                       code_offset & ~0xfUL);
2092                           } else {
2093                               fprintf(outfile,
2094                                       "    IA64_PLT(gen_code_ptr + %ld, "
2095                                       "%d);\t/* %s + %ld */\n",
2096                                       code_offset,
2097                                       get_plt_index(sym_name, addend),
2098                                       sym_name, addend);
2099                           }
2100                           break;
2101                       default:
2102                           error("unsupported ia64 relocation (0x%x)",
2103                                 type);
2104                     }
2105                 }
2106                 fprintf(outfile, "    ia64_nop_b(gen_code_ptr + %d);\n",
2107                         copy_size - 16 + 2);
2108             }
2109 #elif defined(HOST_SPARC)
2110             {
2111                 char name[256];
2112                 int type;
2113                 int addend;
2114                 int reloc_offset;
2115                 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2116                     if (rel->r_offset >= start_offset &&
2117                         rel->r_offset < start_offset + copy_size) {
2118                         sym_name = strtab + symtab[ELF32_R_SYM(rel->r_info)].st_name;
2119                         get_reloc_expr(name, sizeof(name), sym_name);
2120                         type = ELF32_R_TYPE(rel->r_info);
2121                         addend = rel->r_addend;
2122                         reloc_offset = rel->r_offset - start_offset;
2123                         switch(type) {
2124                         case R_SPARC_32:
2125                             fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
2126                                     reloc_offset, name, addend);
2127                             break;
2128                         case R_SPARC_HI22:
2129                             fprintf(outfile,
2130                                     "    *(uint32_t *)(gen_code_ptr + %d) = "
2131                                     "((*(uint32_t *)(gen_code_ptr + %d)) "
2132                                     " & ~0x3fffff) "
2133                                     " | (((%s + %d) >> 10) & 0x3fffff);\n",
2134                                     reloc_offset, reloc_offset, name, addend);
2135                             break;
2136                         case R_SPARC_LO10:
2137                             fprintf(outfile,
2138                                     "    *(uint32_t *)(gen_code_ptr + %d) = "
2139                                     "((*(uint32_t *)(gen_code_ptr + %d)) "
2140                                     " & ~0x3ff) "
2141                                     " | ((%s + %d) & 0x3ff);\n",
2142                                     reloc_offset, reloc_offset, name, addend);
2143                             break;
2144                         case R_SPARC_WDISP30:
2145                             fprintf(outfile,
2146                                     "    *(uint32_t *)(gen_code_ptr + %d) = "
2147                                     "((*(uint32_t *)(gen_code_ptr + %d)) "
2148                                     " & ~0x3fffffff) "
2149                                     " | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
2150                                     "    & 0x3fffffff);\n",
2151                                     reloc_offset, reloc_offset, name, addend,
2152                                     reloc_offset);
2153                             break;
2154                         default:
2155                             error("unsupported sparc relocation (%d)", type);
2156                         }
2157                     }
2158                 }
2159             }
2160 #elif defined(HOST_SPARC64)
2161             {
2162                 char name[256];
2163                 int type;
2164                 int addend;
2165                 int reloc_offset;
2166                 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2167                     if (rel->r_offset >= start_offset &&
2168                         rel->r_offset < start_offset + copy_size) {
2169                         sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name;
2170                         get_reloc_expr(name, sizeof(name), sym_name);
2171                         type = ELF64_R_TYPE(rel->r_info);
2172                         addend = rel->r_addend;
2173                         reloc_offset = rel->r_offset - start_offset;
2174                         switch(type) {
2175                         case R_SPARC_32:
2176                             fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
2177                                     reloc_offset, name, addend);
2178                             break;
2179                         case R_SPARC_HI22:
2180                             fprintf(outfile,
2181                                     "    *(uint32_t *)(gen_code_ptr + %d) = "
2182                                     "((*(uint32_t *)(gen_code_ptr + %d)) "
2183                                     " & ~0x3fffff) "
2184                                     " | (((%s + %d) >> 10) & 0x3fffff);\n",
2185                                     reloc_offset, reloc_offset, name, addend);
2186                             break;
2187                         case R_SPARC_LO10:
2188                             fprintf(outfile,
2189                                     "    *(uint32_t *)(gen_code_ptr + %d) = "
2190                                     "((*(uint32_t *)(gen_code_ptr + %d)) "
2191                                     " & ~0x3ff) "
2192                                     " | ((%s + %d) & 0x3ff);\n",
2193                                     reloc_offset, reloc_offset, name, addend);
2194                             break;
2195                         case R_SPARC_WDISP30:
2196                             fprintf(outfile,
2197                                     "    *(uint32_t *)(gen_code_ptr + %d) = "
2198                                     "((*(uint32_t *)(gen_code_ptr + %d)) "
2199                                     " & ~0x3fffffff) "
2200                                     " | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
2201                                     "    & 0x3fffffff);\n",
2202                                     reloc_offset, reloc_offset, name, addend,
2203                                     reloc_offset);
2204                             break;
2205                         default:
2206                             error("unsupported sparc64 relocation (%d)", type);
2207                         }
2208                     }
2209                 }
2210             }
2211 #elif defined(HOST_ARM)
2212             {
2213                 char name[256];
2214                 int type;
2215                 int addend;
2216                 int reloc_offset;
2217
2218                 arm_emit_ldr_info(name, start_offset, outfile, p_start, p_end,
2219                                   relocs, nb_relocs);
2220
2221                 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2222                 if (rel->r_offset >= start_offset &&
2223                     rel->r_offset < start_offset + copy_size) {
2224                     sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
2225                     /* the compiler leave some unnecessary references to the code */
2226                     if (sym_name[0] == '\0')
2227                         continue;
2228                     get_reloc_expr(name, sizeof(name), sym_name);
2229                     type = ELF32_R_TYPE(rel->r_info);
2230                     addend = get32((uint32_t *)(text + rel->r_offset));
2231                     reloc_offset = rel->r_offset - start_offset;
2232                     switch(type) {
2233                     case R_ARM_ABS32:
2234                         fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
2235                                 reloc_offset, name, addend);
2236                         break;
2237                     case R_ARM_PC24:
2238                         fprintf(outfile, "    arm_reloc_pc24((uint32_t *)(gen_code_ptr + %d), 0x%x, %s);\n",
2239                                 reloc_offset, addend, name);
2240                         break;
2241                     default:
2242                         error("unsupported arm relocation (%d)", type);
2243                     }
2244                 }
2245                 }
2246             }
2247 #elif defined(HOST_M68K)
2248             {
2249                 char name[256];
2250                 int type;
2251                 int addend;
2252                 int reloc_offset;
2253                 Elf32_Sym *sym;
2254                 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2255                 if (rel->r_offset >= start_offset &&
2256                     rel->r_offset < start_offset + copy_size) {
2257                     sym = &(symtab[ELFW(R_SYM)(rel->r_info)]);
2258                     sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
2259                     get_reloc_expr(name, sizeof(name), sym_name);
2260                     type = ELF32_R_TYPE(rel->r_info);
2261                     addend = get32((uint32_t *)(text + rel->r_offset)) + rel->r_addend;
2262                     reloc_offset = rel->r_offset - start_offset;
2263                     switch(type) {
2264                     case R_68K_32:
2265                         fprintf(outfile, "    /* R_68K_32 RELOC, offset %x */\n", rel->r_offset) ;
2266                         fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %#x;\n",
2267                                 reloc_offset, name, addend );
2268                         break;
2269                     case R_68K_PC32:
2270                         fprintf(outfile, "    /* R_68K_PC32 RELOC, offset %x */\n", rel->r_offset);
2271                         fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %#x) + %#x;\n",
2272                                 reloc_offset, name, reloc_offset, /*sym->st_value+*/ addend);
2273                         break;
2274                     default:
2275                         error("unsupported m68k relocation (%d)", type);
2276                     }
2277                 }
2278                 }
2279             }
2280 #else
2281 #error unsupported CPU
2282 #endif
2283         fprintf(outfile, "    gen_code_ptr += %d;\n", copy_size);
2284         fprintf(outfile, "}\n");
2285         fprintf(outfile, "break;\n\n");
2286     } else {
2287         fprintf(outfile, "static inline void gen_%s(", name);
2288         if (nb_args == 0) {
2289             fprintf(outfile, "void");
2290         } else {
2291             for(i = 0; i < nb_args; i++) {
2292                 if (i != 0)
2293                     fprintf(outfile, ", ");
2294                 fprintf(outfile, "long param%d", i + 1);
2295             }
2296         }
2297         fprintf(outfile, ")\n");
2298         fprintf(outfile, "{\n");
2299         for(i = 0; i < nb_args; i++) {
2300             fprintf(outfile, "    *gen_opparam_ptr++ = param%d;\n", i + 1);
2301         }
2302         fprintf(outfile, "    *gen_opc_ptr++ = INDEX_%s;\n", name);
2303         fprintf(outfile, "}\n\n");
2304     }
2305 }
2306
2307 int gen_file(FILE *outfile, int out_type)
2308 {
2309     int i;
2310     EXE_SYM *sym;
2311
2312     if (out_type == OUT_INDEX_OP) {
2313         fprintf(outfile, "DEF(end, 0, 0)\n");
2314         fprintf(outfile, "DEF(nop, 0, 0)\n");
2315         fprintf(outfile, "DEF(nop1, 1, 0)\n");
2316         fprintf(outfile, "DEF(nop2, 2, 0)\n");
2317         fprintf(outfile, "DEF(nop3, 3, 0)\n");
2318         for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
2319             const char *name;
2320             name = get_sym_name(sym);
2321             if (strstart(name, OP_PREFIX, NULL)) {
2322                 gen_code(name, sym->st_value, sym->st_size, outfile, 2);
2323             }
2324         }
2325     } else if (out_type == OUT_GEN_OP) {
2326         /* generate gen_xxx functions */
2327         fprintf(outfile, "#include \"dyngen-op.h\"\n");
2328         for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
2329             const char *name;
2330             name = get_sym_name(sym);
2331             if (strstart(name, OP_PREFIX, NULL)) {
2332 #if defined(CONFIG_FORMAT_ELF) || defined(CONFIG_FORMAT_COFF)
2333                 if (sym->st_shndx != text_shndx)
2334                     error("invalid section for opcode (0x%x)", sym->st_shndx);
2335 #endif
2336                 gen_code(name, sym->st_value, sym->st_size, outfile, 0);
2337             }
2338         }
2339
2340     } else {
2341         /* generate big code generation switch */
2342 fprintf(outfile,
2343 "int dyngen_code(uint8_t *gen_code_buf,\n"
2344 "                uint16_t *label_offsets, uint16_t *jmp_offsets,\n"
2345 "                const uint16_t *opc_buf, const uint32_t *opparam_buf, const long *gen_labels)\n"
2346 "{\n"
2347 "    uint8_t *gen_code_ptr;\n"
2348 "    const uint16_t *opc_ptr;\n"
2349 "    const uint32_t *opparam_ptr;\n");
2350
2351 #ifdef HOST_ARM
2352 fprintf(outfile,
2353 "    uint8_t *last_gen_code_ptr = gen_code_buf;\n"
2354 "    LDREntry *arm_ldr_ptr = arm_ldr_table;\n"
2355 "    uint32_t *arm_data_ptr = arm_data_table;\n");
2356 #endif
2357 #ifdef HOST_IA64
2358     {
2359         long addend, not_first = 0;
2360         unsigned long sym_idx;
2361         int index, max_index;
2362         const char *sym_name;
2363         EXE_RELOC *rel;
2364
2365         max_index = -1;
2366         for (i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2367             sym_idx = ELF64_R_SYM(rel->r_info);
2368             sym_name = (strtab + symtab[sym_idx].st_name);
2369             if (strstart(sym_name, "__op_gen_label", NULL))
2370                 continue;
2371             if (ELF64_R_TYPE(rel->r_info) != R_IA64_PCREL21B)
2372                 continue;
2373
2374             addend = rel->r_addend;
2375             index = get_plt_index(sym_name, addend);
2376             if (index <= max_index)
2377                 continue;
2378             max_index = index;
2379             fprintf(outfile, "    extern void %s(void);\n", sym_name);
2380         }
2381
2382         fprintf(outfile,
2383                 "    struct ia64_fixup *plt_fixes = NULL, "
2384                 "*ltoff_fixes = NULL;\n"
2385                 "    static long plt_target[] = {\n\t");
2386
2387         max_index = -1;
2388         for (i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2389             sym_idx = ELF64_R_SYM(rel->r_info);
2390             sym_name = (strtab + symtab[sym_idx].st_name);
2391             if (strstart(sym_name, "__op_gen_label", NULL))
2392                 continue;
2393             if (ELF64_R_TYPE(rel->r_info) != R_IA64_PCREL21B)
2394                 continue;
2395
2396             addend = rel->r_addend;
2397             index = get_plt_index(sym_name, addend);
2398             if (index <= max_index)
2399                 continue;
2400             max_index = index;
2401
2402             if (not_first)
2403                 fprintf(outfile, ",\n\t");
2404             not_first = 1;
2405             if (addend)
2406                 fprintf(outfile, "(long) &%s + %ld", sym_name, addend);
2407             else
2408                 fprintf(outfile, "(long) &%s", sym_name);
2409         }
2410         fprintf(outfile, "\n    };\n"
2411             "    unsigned int plt_offset[%u] = { 0 };\n", max_index + 1);
2412     }
2413 #endif
2414
2415 fprintf(outfile,
2416 "\n"
2417 "    gen_code_ptr = gen_code_buf;\n"
2418 "    opc_ptr = opc_buf;\n"
2419 "    opparam_ptr = opparam_buf;\n");
2420
2421         /* Generate prologue, if needed. */
2422
2423 fprintf(outfile,
2424 "    for(;;) {\n"
2425 "        switch(*opc_ptr++) {\n"
2426 );
2427
2428         for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
2429             const char *name;
2430             name = get_sym_name(sym);
2431             if (strstart(name, OP_PREFIX, NULL)) {
2432 #if 0
2433                 printf("%4d: %s pos=0x%08x len=%d\n",
2434                        i, name, sym->st_value, sym->st_size);
2435 #endif
2436 #if defined(CONFIG_FORMAT_ELF) || defined(CONFIG_FORMAT_COFF)
2437                 if (sym->st_shndx != text_shndx)
2438                     error("invalid section for opcode (0x%x)", sym->st_shndx);
2439 #endif
2440                 gen_code(name, sym->st_value, sym->st_size, outfile, 1);
2441             }
2442         }
2443
2444 fprintf(outfile,
2445 "        case INDEX_op_nop:\n"
2446 "            break;\n"
2447 "        case INDEX_op_nop1:\n"
2448 "            opparam_ptr++;\n"
2449 "            break;\n"
2450 "        case INDEX_op_nop2:\n"
2451 "            opparam_ptr += 2;\n"
2452 "            break;\n"
2453 "        case INDEX_op_nop3:\n"
2454 "            opparam_ptr += 3;\n"
2455 "            break;\n"
2456 "        default:\n"
2457 "            goto the_end;\n"
2458 "        }\n");
2459
2460 #ifdef HOST_ARM
2461 /* generate constant table if needed */
2462 fprintf(outfile,
2463 "        if ((gen_code_ptr - last_gen_code_ptr) >= (MAX_FRAG_SIZE - MAX_OP_SIZE)) {\n"
2464 "            gen_code_ptr = arm_flush_ldr(gen_code_ptr, arm_ldr_table, arm_ldr_ptr, arm_data_table, arm_data_ptr, 1);\n"
2465 "            last_gen_code_ptr = gen_code_ptr;\n"
2466 "            arm_ldr_ptr = arm_ldr_table;\n"
2467 "            arm_data_ptr = arm_data_table;\n"
2468 "        }\n");
2469 #endif
2470
2471
2472 fprintf(outfile,
2473 "    }\n"
2474 " the_end:\n"
2475 );
2476 #ifdef HOST_IA64
2477     fprintf(outfile,
2478             "    {\n"
2479             "      extern char code_gen_buffer[];\n"
2480             "      ia64_apply_fixes(&gen_code_ptr, ltoff_fixes, "
2481             "(uint64_t) code_gen_buffer + 2*(1<<20), plt_fixes,\n\t\t\t"
2482             "sizeof(plt_target)/sizeof(plt_target[0]),\n\t\t\t"
2483             "plt_target, plt_offset);\n    }\n");
2484 #endif
2485
2486 /* generate some code patching */
2487 #ifdef HOST_ARM
2488 fprintf(outfile, "gen_code_ptr = arm_flush_ldr(gen_code_ptr, arm_ldr_table, arm_ldr_ptr, arm_data_table, arm_data_ptr, 0);\n");
2489 #endif
2490     /* flush instruction cache */
2491     fprintf(outfile, "flush_icache_range((unsigned long)gen_code_buf, (unsigned long)gen_code_ptr);\n");
2492
2493     fprintf(outfile, "return gen_code_ptr -  gen_code_buf;\n");
2494     fprintf(outfile, "}\n\n");
2495
2496     }
2497
2498     return 0;
2499 }
2500
2501 void usage(void)
2502 {
2503     printf("dyngen (c) 2003 Fabrice Bellard\n"
2504            "usage: dyngen [-o outfile] [-c] objfile\n"
2505            "Generate a dynamic code generator from an object file\n"
2506            "-c     output enum of operations\n"
2507            "-g     output gen_op_xx() functions\n"
2508            );
2509     exit(1);
2510 }
2511
2512 int main(int argc, char **argv)
2513 {
2514     int c, out_type;
2515     const char *filename, *outfilename;
2516     FILE *outfile;
2517
2518     outfilename = "out.c";
2519     out_type = OUT_CODE;
2520     for(;;) {
2521         c = getopt(argc, argv, "ho:cg");
2522         if (c == -1)
2523             break;
2524         switch(c) {
2525         case 'h':
2526             usage();
2527             break;
2528         case 'o':
2529             outfilename = optarg;
2530             break;
2531         case 'c':
2532             out_type = OUT_INDEX_OP;
2533             break;
2534         case 'g':
2535             out_type = OUT_GEN_OP;
2536             break;
2537         }
2538     }
2539     if (optind >= argc)
2540         usage();
2541     filename = argv[optind];
2542     outfile = fopen(outfilename, "w");
2543     if (!outfile)
2544         error("could not open '%s'", outfilename);
2545
2546     load_object(filename);
2547     gen_file(outfile, out_type);
2548     fclose(outfile);
2549     return 0;
2550 }