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_PPC64)
  72
  73 #define ELF_CLASS       ELFCLASS64
  74 #define ELF_ARCH        EM_PPC64
  75 #define elf_check_arch(x) ((x) == EM_PPC64)
  76 #define ELF_USES_RELOCA
  77
  78 #elif defined(HOST_S390)
  79
  80 #define ELF_CLASS       ELFCLASS32
  81 #define ELF_ARCH        EM_S390
  82 #define elf_check_arch(x) ((x) == EM_S390)
  83 #define ELF_USES_RELOCA
  84
  85 #elif defined(HOST_ALPHA)
  86
  87 #define ELF_CLASS       ELFCLASS64
  88 #define ELF_ARCH        EM_ALPHA
  89 #define elf_check_arch(x) ((x) == EM_ALPHA)
  90 #define ELF_USES_RELOCA
  91
  92 #elif defined(HOST_IA64)
  93
  94 #define ELF_CLASS       ELFCLASS64
  95 #define ELF_ARCH        EM_IA_64
  96 #define elf_check_arch(x) ((x) == EM_IA_64)
  97 #define ELF_USES_RELOCA
  98
  99 #elif defined(HOST_SPARC)
 100
 101 #define ELF_CLASS       ELFCLASS32
 102 #define ELF_ARCH        EM_SPARC
 103 #define elf_check_arch(x) ((x) == EM_SPARC || (x) == EM_SPARC32PLUS)
 104 #define ELF_USES_RELOCA
 105
 106 #elif defined(HOST_SPARC64)
 107
 108 #define ELF_CLASS       ELFCLASS64
 109 #define ELF_ARCH        EM_SPARCV9
 110 #define elf_check_arch(x) ((x) == EM_SPARCV9)
 111 #define ELF_USES_RELOCA
 112
 113 #elif defined(HOST_ARM)
 114
 115 #define ELF_CLASS       ELFCLASS32
 116 #define ELF_ARCH        EM_ARM
 117 #define elf_check_arch(x) ((x) == EM_ARM)
 118 #define ELF_USES_RELOC
 119
 120 #elif defined(HOST_M68K)
 121
 122 #define ELF_CLASS       ELFCLASS32
 123 #define ELF_ARCH        EM_68K
 124 #define elf_check_arch(x) ((x) == EM_68K)
 125 #define ELF_USES_RELOCA
 126
 127 #elif defined(HOST_HPPA)
 128
 129 #define ELF_CLASS   ELFCLASS32
 130 #define ELF_ARCH    EM_PARISC
 131 #define elf_check_arch(x) ((x) == EM_PARISC)
 132 #define ELF_USES_RELOCA
 133
 134 #elif defined(HOST_MIPS)
 135
 136 #define ELF_CLASS       ELFCLASS32
 137 #define ELF_ARCH        EM_MIPS
 138 #define elf_check_arch(x) ((x) == EM_MIPS)
 139 #define ELF_USES_RELOC
 140
 141 #elif defined(HOST_MIPS64)
 142
 143 /* Assume n32 ABI here, which is ELF32. */
 144 #define ELF_CLASS       ELFCLASS32
 145 #define ELF_ARCH        EM_MIPS
 146 #define elf_check_arch(x) ((x) == EM_MIPS)
 147 #define ELF_USES_RELOCA
 148
 149 #else
 150 #error unsupported CPU - please update the code
 151 #endif
 152
 153 #include "elf.h"
 154
 155 #if ELF_CLASS == ELFCLASS32
 156 typedef int32_t host_long;
 157 typedef uint32_t host_ulong;
 158 #define swabls(x) swab32s(x)
 159 #define swablss(x) swab32ss(x)
 160 #else
 161 typedef int64_t host_long;
 162 typedef uint64_t host_ulong;
 163 #define swabls(x) swab64s(x)
 164 #define swablss(x) swab64ss(x)
 165 #endif
 166
 167 #ifdef ELF_USES_RELOCA
 168 #define SHT_RELOC SHT_RELA
 169 #else
 170 #define SHT_RELOC SHT_REL
 171 #endif
 172
 173 #define EXE_RELOC ELF_RELOC
 174 #define EXE_SYM ElfW(Sym)
 175
 176 #endif /* CONFIG_FORMAT_ELF */
 177
 178 #ifdef CONFIG_FORMAT_COFF
 179
 180 typedef int32_t host_long;
 181 typedef uint32_t host_ulong;
 182
 183 #include "a.out.h"
 184
 185 #define FILENAMELEN 256
 186
 187 typedef struct coff_sym {
 188     struct external_syment *st_syment;
 189     char st_name[FILENAMELEN];
 190     uint32_t st_value;
 191     int  st_size;
 192     uint8_t st_type;
 193     uint8_t st_shndx;
 194 } coff_Sym;
 195
 196 typedef struct coff_rel {
 197     struct external_reloc *r_reloc;
 198     int  r_offset;
 199     uint8_t r_type;
 200 } coff_Rel;
 201
 202 #define EXE_RELOC struct coff_rel
 203 #define EXE_SYM struct coff_sym
 204
 205 #endif /* CONFIG_FORMAT_COFF */
 206
 207 #ifdef CONFIG_FORMAT_MACH
 208
 209 #include <mach-o/loader.h>
 210 #include <mach-o/nlist.h>
 211 #include <mach-o/reloc.h>
 212 #include <mach-o/ppc/reloc.h>
 213
 214 # define check_mach_header(x) (x.magic == MH_MAGIC)
 215 typedef int32_t host_long;
 216 typedef uint32_t host_ulong;
 217
 218 struct nlist_extended
 219 {
 220    union {
 221    char *n_name;
 222    long  n_strx;
 223    } n_un;
 224    unsigned char n_type;
 225    unsigned char n_sect;
 226    short st_desc;
 227    unsigned long st_value;
 228    unsigned long st_size;
 229 };
 230
 231 #define EXE_RELOC struct relocation_info
 232 #define EXE_SYM struct nlist_extended
 233
 234 #endif /* CONFIG_FORMAT_MACH */
 235
 236 #include "bswap.h"
 237
 238 enum {
 239     OUT_GEN_OP,
 240     OUT_CODE,
 241     OUT_INDEX_OP,
 242 };
 243
 244 /* all dynamically generated functions begin with this code */
 245 #define OP_PREFIX "op_"
 246
 247 int do_swap;
 248
 249 static void __attribute__((noreturn)) __attribute__((format (printf, 1, 2))) error(const char *fmt, ...)
 250 {
 251     va_list ap;
 252     va_start(ap, fmt);
 253     fprintf(stderr, "dyngen: ");
 254     vfprintf(stderr, fmt, ap);
 255     fprintf(stderr, "\n");
 256     va_end(ap);
 257     exit(1);
 258 }
 259
 260 static void *load_data(int fd, long offset, unsigned int size)
 261 {
 262     char *data;
 263
 264     data = malloc(size);
 265     if (!data)
 266         return NULL;
 267     lseek(fd, offset, SEEK_SET);
 268     if (read(fd, data, size) != size) {
 269         free(data);
 270         return NULL;
 271     }
 272     return data;
 273 }
 274
 275 static int strstart(const char *str, const char *val, const char **ptr)
 276 {
 277     const char *p, *q;
 278     p = str;
 279     q = val;
 280     while (*q != '\0') {
 281         if (*p != *q)
 282             return 0;
 283         p++;
 284         q++;
 285     }
 286     if (ptr)
 287         *ptr = p;
 288     return 1;
 289 }
 290
 291 static void pstrcpy(char *buf, int buf_size, const char *str)
 292 {
 293     int c;
 294     char *q = buf;
 295
 296     if (buf_size <= 0)
 297         return;
 298
 299     for(;;) {
 300         c = *str++;
 301         if (c == 0 || q >= buf + buf_size - 1)
 302             break;
 303         *q++ = c;
 304     }
 305     *q = '\0';
 306 }
 307
 308 static void swab16s(uint16_t *p)
 309 {
 310     *p = bswap16(*p);
 311 }
 312
 313 static void swab32s(uint32_t *p)
 314 {
 315     *p = bswap32(*p);
 316 }
 317
 318 static void swab32ss(int32_t *p)
 319 {
 320     *p = bswap32(*p);
 321 }
 322
 323 static void swab64s(uint64_t *p)
 324 {
 325     *p = bswap64(*p);
 326 }
 327
 328 static void swab64ss(int64_t *p)
 329 {
 330     *p = bswap64(*p);
 331 }
 332
 333 static uint16_t get16(uint16_t *p)
 334 {
 335     uint16_t val;
 336     val = *p;
 337     if (do_swap)
 338         val = bswap16(val);
 339     return val;
 340 }
 341
 342 static uint32_t get32(uint32_t *p)
 343 {
 344     uint32_t val;
 345     val = *p;
 346     if (do_swap)
 347         val = bswap32(val);
 348     return val;
 349 }
 350
 351 static void put16(uint16_t *p, uint16_t val)
 352 {
 353     if (do_swap)
 354         val = bswap16(val);
 355     *p = val;
 356 }
 357
 358 static void put32(uint32_t *p, uint32_t val)
 359 {
 360     if (do_swap)
 361         val = bswap32(val);
 362     *p = val;
 363 }
 364
 365 /* executable information */
 366 EXE_SYM *symtab;
 367 int nb_syms;
 368 int text_shndx;
 369 uint8_t *text;
 370 EXE_RELOC *relocs;
 371 int nb_relocs;
 372
 373 #ifdef CONFIG_FORMAT_ELF
 374
 375 /* ELF file info */
 376 struct elf_shdr *shdr;
 377 uint8_t **sdata;
 378 struct elfhdr ehdr;
 379 char *strtab;
 380
 381 static int elf_must_swap(struct elfhdr *h)
 382 {
 383   union {
 384       uint32_t i;
 385       uint8_t b[4];
 386   } swaptest;
 387
 388   swaptest.i = 1;
 389   return (h->e_ident[EI_DATA] == ELFDATA2MSB) !=
 390       (swaptest.b[0] == 0);
 391 }
 392
 393 static void elf_swap_ehdr(struct elfhdr *h)
 394 {
 395     swab16s(&h->e_type);                        /* Object file type */
 396     swab16s(&h->        e_machine);             /* Architecture */
 397     swab32s(&h->        e_version);             /* Object file version */
 398     swabls(&h-> e_entry);               /* Entry point virtual address */
 399     swabls(&h-> e_phoff);               /* Program header table file offset */
 400     swabls(&h-> e_shoff);               /* Section header table file offset */
 401     swab32s(&h->        e_flags);               /* Processor-specific flags */
 402     swab16s(&h->        e_ehsize);              /* ELF header size in bytes */
 403     swab16s(&h->        e_phentsize);           /* Program header table entry size */
 404     swab16s(&h->        e_phnum);               /* Program header table entry count */
 405     swab16s(&h->        e_shentsize);           /* Section header table entry size */
 406     swab16s(&h->        e_shnum);               /* Section header table entry count */
 407     swab16s(&h->        e_shstrndx);            /* Section header string table index */
 408 }
 409
 410 static void elf_swap_shdr(struct elf_shdr *h)
 411 {
 412   swab32s(&h->  sh_name);               /* Section name (string tbl index) */
 413   swab32s(&h->  sh_type);               /* Section type */
 414   swabls(&h->   sh_flags);              /* Section flags */
 415   swabls(&h->   sh_addr);               /* Section virtual addr at execution */
 416   swabls(&h->   sh_offset);             /* Section file offset */
 417   swabls(&h->   sh_size);               /* Section size in bytes */
 418   swab32s(&h->  sh_link);               /* Link to another section */
 419   swab32s(&h->  sh_info);               /* Additional section information */
 420   swabls(&h->   sh_addralign);          /* Section alignment */
 421   swabls(&h->   sh_entsize);            /* Entry size if section holds table */
 422 }
 423
 424 static void elf_swap_phdr(struct elf_phdr *h)
 425 {
 426     swab32s(&h->p_type);                        /* Segment type */
 427     swabls(&h->p_offset);               /* Segment file offset */
 428     swabls(&h->p_vaddr);                /* Segment virtual address */
 429     swabls(&h->p_paddr);                /* Segment physical address */
 430     swabls(&h->p_filesz);               /* Segment size in file */
 431     swabls(&h->p_memsz);                /* Segment size in memory */
 432     swab32s(&h->p_flags);               /* Segment flags */
 433     swabls(&h->p_align);                /* Segment alignment */
 434 }
 435
 436 static void elf_swap_rel(ELF_RELOC *rel)
 437 {
 438     swabls(&rel->r_offset);
 439     swabls(&rel->r_info);
 440 #ifdef ELF_USES_RELOCA
 441     swablss(&rel->r_addend);
 442 #endif
 443 }
 444
 445 static struct elf_shdr *find_elf_section(struct elf_shdr *shdr, int shnum,
 446                                          const char *shstr, const char *name)
 447 {
 448     int i;
 449     const char *shname;
 450     struct elf_shdr *sec;
 451
 452     for(i = 0; i < shnum; i++) {
 453         sec = &shdr[i];
 454         if (!sec->sh_name)
 455             continue;
 456         shname = shstr + sec->sh_name;
 457         if (!strcmp(shname, name))
 458             return sec;
 459     }
 460     return NULL;
 461 }
 462
 463 static int find_reloc(int sh_index)
 464 {
 465     struct elf_shdr *sec;
 466     int i;
 467
 468     for(i = 0; i < ehdr.e_shnum; i++) {
 469         sec = &shdr[i];
 470         if (sec->sh_type == SHT_RELOC && sec->sh_info == sh_index)
 471             return i;
 472     }
 473     return 0;
 474 }
 475
 476 static host_ulong get_rel_offset(EXE_RELOC *rel)
 477 {
 478     return rel->r_offset;
 479 }
 480
 481 static char *get_rel_sym_name(EXE_RELOC *rel)
 482 {
 483     return strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
 484 }
 485
 486 static char *get_sym_name(EXE_SYM *sym)
 487 {
 488     return strtab + sym->st_name;
 489 }
 490
 491 /* load an elf object file */
 492 static int load_object(const char *filename)
 493 {
 494     int fd;
 495     struct elf_shdr *sec, *symtab_sec, *strtab_sec, *text_sec;
 496     int i, j;
 497     ElfW(Sym) *sym;
 498     char *shstr;
 499     ELF_RELOC *rel;
 500
 501     fd = open(filename, O_RDONLY);
 502     if (fd < 0)
 503         error("can't open file '%s'", filename);
 504
 505     /* Read ELF header.  */
 506     if (read(fd, &ehdr, sizeof (ehdr)) != sizeof (ehdr))
 507         error("unable to read file header");
 508
 509     /* Check ELF identification.  */
 510     if (ehdr.e_ident[EI_MAG0] != ELFMAG0
 511      || ehdr.e_ident[EI_MAG1] != ELFMAG1
 512      || ehdr.e_ident[EI_MAG2] != ELFMAG2
 513      || ehdr.e_ident[EI_MAG3] != ELFMAG3
 514      || ehdr.e_ident[EI_VERSION] != EV_CURRENT) {
 515         error("bad ELF header");
 516     }
 517
 518     do_swap = elf_must_swap(&ehdr);
 519     if (do_swap)
 520         elf_swap_ehdr(&ehdr);
 521     if (ehdr.e_ident[EI_CLASS] != ELF_CLASS)
 522         error("Unsupported ELF class");
 523     if (ehdr.e_type != ET_REL)
 524         error("ELF object file expected");
 525     if (ehdr.e_version != EV_CURRENT)
 526         error("Invalid ELF version");
 527     if (!elf_check_arch(ehdr.e_machine))
 528         error("Unsupported CPU (e_machine=%d)", ehdr.e_machine);
 529
 530     /* read section headers */
 531     shdr = load_data(fd, ehdr.e_shoff, ehdr.e_shnum * sizeof(struct elf_shdr));
 532     if (do_swap) {
 533         for(i = 0; i < ehdr.e_shnum; i++) {
 534             elf_swap_shdr(&shdr[i]);
 535         }
 536     }
 537
 538     /* read all section data */
 539     sdata = malloc(sizeof(void *) * ehdr.e_shnum);
 540     memset(sdata, 0, sizeof(void *) * ehdr.e_shnum);
 541
 542     for(i = 0;i < ehdr.e_shnum; i++) {
 543         sec = &shdr[i];
 544         if (sec->sh_type != SHT_NOBITS)
 545             sdata[i] = load_data(fd, sec->sh_offset, sec->sh_size);
 546     }
 547
 548     sec = &shdr[ehdr.e_shstrndx];
 549     shstr = (char *)sdata[ehdr.e_shstrndx];
 550
 551     /* swap relocations */
 552     for(i = 0; i < ehdr.e_shnum; i++) {
 553         sec = &shdr[i];
 554         if (sec->sh_type == SHT_RELOC) {
 555             nb_relocs = sec->sh_size / sec->sh_entsize;
 556             if (do_swap) {
 557                 for(j = 0, rel = (ELF_RELOC *)sdata[i]; j < nb_relocs; j++, rel++)
 558                     elf_swap_rel(rel);
 559             }
 560         }
 561     }
 562     /* text section */
 563
 564     text_sec = find_elf_section(shdr, ehdr.e_shnum, shstr, ".text");
 565     if (!text_sec)
 566         error("could not find .text section");
 567     text_shndx = text_sec - shdr;
 568     text = sdata[text_shndx];
 569
 570     /* find text relocations, if any */
 571     relocs = NULL;
 572     nb_relocs = 0;
 573     i = find_reloc(text_shndx);
 574     if (i != 0) {
 575         relocs = (ELF_RELOC *)sdata[i];
 576         nb_relocs = shdr[i].sh_size / shdr[i].sh_entsize;
 577     }
 578
 579     symtab_sec = find_elf_section(shdr, ehdr.e_shnum, shstr, ".symtab");
 580     if (!symtab_sec)
 581         error("could not find .symtab section");
 582     strtab_sec = &shdr[symtab_sec->sh_link];
 583
 584     symtab = (ElfW(Sym) *)sdata[symtab_sec - shdr];
 585     strtab = (char *)sdata[symtab_sec->sh_link];
 586
 587     nb_syms = symtab_sec->sh_size / sizeof(ElfW(Sym));
 588     if (do_swap) {
 589         for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
 590             swab32s(&sym->st_name);
 591             swabls(&sym->st_value);
 592             swabls(&sym->st_size);
 593             swab16s(&sym->st_shndx);
 594         }
 595     }
 596     close(fd);
 597     return 0;
 598 }
 599
 600 #endif /* CONFIG_FORMAT_ELF */
 601
 602 #ifdef CONFIG_FORMAT_COFF
 603
 604 /* COFF file info */
 605 struct external_scnhdr *shdr;
 606 uint8_t **sdata;
 607 struct external_filehdr fhdr;
 608 struct external_syment *coff_symtab;
 609 char *strtab;
 610 int coff_text_shndx, coff_data_shndx;
 611
 612 int data_shndx;
 613
 614 #define STRTAB_SIZE 4
 615
 616 #define DIR32   0x06
 617 #define DISP32  0x14
 618
 619 #define T_FUNCTION  0x20
 620 #define C_EXTERNAL  2
 621
 622 void sym_ent_name(struct external_syment *ext_sym, EXE_SYM *sym)
 623 {
 624     char *q;
 625     int c, i, len;
 626
 627     if (ext_sym->e.e.e_zeroes != 0) {
 628         q = sym->st_name;
 629         for(i = 0; i < 8; i++) {
 630             c = ext_sym->e.e_name[i];
 631             if (c == '\0')
 632                 break;
 633             *q++ = c;
 634         }
 635         *q = '\0';
 636     } else {
 637         pstrcpy(sym->st_name, sizeof(sym->st_name), strtab + ext_sym->e.e.e_offset);
 638     }
 639
 640     /* now convert the name to a C name (suppress the leading '_') */
 641     if (sym->st_name[0] == '_') {
 642         len = strlen(sym->st_name);
 643         memmove(sym->st_name, sym->st_name + 1, len - 1);
 644         sym->st_name[len - 1] = '\0';
 645     }
 646 }
 647
 648 char *name_for_dotdata(struct coff_rel *rel)
 649 {
 650         int i;
 651         struct coff_sym *sym;
 652         uint32_t text_data;
 653
 654         text_data = *(uint32_t *)(text + rel->r_offset);
 655
 656         for (i = 0, sym = symtab; i < nb_syms; i++, sym++) {
 657                 if (sym->st_syment->e_scnum == data_shndx &&
 658                     text_data >= sym->st_value &&
 659                     text_data < sym->st_value + sym->st_size) {
 660
 661                     return sym->st_name;
 662
 663                 }
 664         }
 665         return NULL;
 666 }
 667
 668 static char *get_sym_name(EXE_SYM *sym)
 669 {
 670     return sym->st_name;
 671 }
 672
 673 static char *get_rel_sym_name(EXE_RELOC *rel)
 674 {
 675     char *name;
 676     name = get_sym_name(symtab + *(uint32_t *)(rel->r_reloc->r_symndx));
 677     if (!strcmp(name, ".data"))
 678         name = name_for_dotdata(rel);
 679     if (name[0] == '.')
 680         return NULL;
 681     return name;
 682 }
 683
 684 static host_ulong get_rel_offset(EXE_RELOC *rel)
 685 {
 686     return rel->r_offset;
 687 }
 688
 689 struct external_scnhdr *find_coff_section(struct external_scnhdr *shdr, int shnum, const char *name)
 690 {
 691     int i;
 692     const char *shname;
 693     struct external_scnhdr *sec;
 694
 695     for(i = 0; i < shnum; i++) {
 696         sec = &shdr[i];
 697         if (!sec->s_name)
 698             continue;
 699         shname = sec->s_name;
 700         if (!strcmp(shname, name))
 701             return sec;
 702     }
 703     return NULL;
 704 }
 705
 706 /* load a coff object file */
 707 int load_object(const char *filename)
 708 {
 709     int fd;
 710     struct external_scnhdr *sec, *text_sec, *data_sec;
 711     int i;
 712     struct external_syment *ext_sym;
 713     struct external_reloc *coff_relocs;
 714     struct external_reloc *ext_rel;
 715     uint32_t *n_strtab;
 716     EXE_SYM *sym;
 717     EXE_RELOC *rel;
 718     const char *p;
 719     int aux_size, j;
 720
 721     fd = open(filename, O_RDONLY
 722 #ifdef _WIN32
 723               | O_BINARY
 724 #endif
 725               );
 726     if (fd < 0)
 727         error("can't open file '%s'", filename);
 728
 729     /* Read COFF header.  */
 730     if (read(fd, &fhdr, sizeof (fhdr)) != sizeof (fhdr))
 731         error("unable to read file header");
 732
 733     /* Check COFF identification.  */
 734     if (fhdr.f_magic != I386MAGIC) {
 735         error("bad COFF header");
 736     }
 737     do_swap = 0;
 738
 739     /* read section headers */
 740     shdr = load_data(fd, sizeof(struct external_filehdr) + fhdr.f_opthdr, fhdr.f_nscns * sizeof(struct external_scnhdr));
 741
 742     /* read all section data */
 743     sdata = malloc(sizeof(void *) * fhdr.f_nscns);
 744     memset(sdata, 0, sizeof(void *) * fhdr.f_nscns);
 745
 746     for(i = 0;i < fhdr.f_nscns; i++) {
 747         sec = &shdr[i];
 748         if (!strstart(sec->s_name,  ".bss", &p))
 749             sdata[i] = load_data(fd, sec->s_scnptr, sec->s_size);
 750     }
 751
 752
 753     /* text section */
 754     text_sec = find_coff_section(shdr, fhdr.f_nscns, ".text");
 755     if (!text_sec)
 756         error("could not find .text section");
 757     coff_text_shndx = text_sec - shdr;
 758     text = sdata[coff_text_shndx];
 759
 760     /* data section */
 761     data_sec = find_coff_section(shdr, fhdr.f_nscns, ".data");
 762     if (!data_sec)
 763         error("could not find .data section");
 764     coff_data_shndx = data_sec - shdr;
 765
 766     coff_symtab = load_data(fd, fhdr.f_symptr, fhdr.f_nsyms*SYMESZ);
 767     for (i = 0, ext_sym = coff_symtab; i < nb_syms; i++, ext_sym++) {
 768         for(i=0;i<8;i++)
 769             printf(" %02x", ((uint8_t *)ext_sym->e.e_name)[i]);
 770         printf("\n");
 771     }
 772
 773
 774     n_strtab = load_data(fd, (fhdr.f_symptr + fhdr.f_nsyms*SYMESZ), STRTAB_SIZE);
 775     strtab = load_data(fd, (fhdr.f_symptr + fhdr.f_nsyms*SYMESZ), *n_strtab);
 776
 777     nb_syms = fhdr.f_nsyms;
 778
 779     for (i = 0, ext_sym = coff_symtab; i < nb_syms; i++, ext_sym++) {
 780       if (strstart(ext_sym->e.e_name, ".text", NULL))
 781                   text_shndx = ext_sym->e_scnum;
 782           if (strstart(ext_sym->e.e_name, ".data", NULL))
 783                   data_shndx = ext_sym->e_scnum;
 784     }
 785
 786         /* set coff symbol */
 787         symtab = malloc(sizeof(struct coff_sym) * nb_syms);
 788
 789         for (i = 0, ext_sym = coff_symtab, sym = symtab; i < nb_syms; i++, ext_sym++, sym++) {
 790                 memset(sym, 0, sizeof(*sym));
 791                 sym->st_syment = ext_sym;
 792                 sym_ent_name(ext_sym, sym);
 793                 sym->st_value = ext_sym->e_value;
 794
 795                 aux_size = *(int8_t *)ext_sym->e_numaux;
 796                 if (ext_sym->e_scnum == text_shndx && ext_sym->e_type == T_FUNCTION) {
 797                         for (j = aux_size + 1; j < nb_syms - i; j++) {
 798                                 if ((ext_sym + j)->e_scnum == text_shndx &&
 799                                         (ext_sym + j)->e_type == T_FUNCTION ){
 800                                         sym->st_size = (ext_sym + j)->e_value - ext_sym->e_value;
 801                                         break;
 802                                 } else if (j == nb_syms - i - 1) {
 803                                         sec = &shdr[coff_text_shndx];
 804                                         sym->st_size = sec->s_size - ext_sym->e_value;
 805                                         break;
 806                                 }
 807                         }
 808                 } else if (ext_sym->e_scnum == data_shndx && *(uint8_t *)ext_sym->e_sclass == C_EXTERNAL) {
 809                         for (j = aux_size + 1; j < nb_syms - i; j++) {
 810                                 if ((ext_sym + j)->e_scnum == data_shndx) {
 811                                         sym->st_size = (ext_sym + j)->e_value - ext_sym->e_value;
 812                                         break;
 813                                 } else if (j == nb_syms - i - 1) {
 814                                         sec = &shdr[coff_data_shndx];
 815                                         sym->st_size = sec->s_size - ext_sym->e_value;
 816                                         break;
 817                                 }
 818                         }
 819                 } else {
 820                         sym->st_size = 0;
 821                 }
 822
 823                 sym->st_type = ext_sym->e_type;
 824                 sym->st_shndx = ext_sym->e_scnum;
 825         }
 826
 827
 828     /* find text relocations, if any */
 829     sec = &shdr[coff_text_shndx];
 830     coff_relocs = load_data(fd, sec->s_relptr, sec->s_nreloc*RELSZ);
 831     nb_relocs = sec->s_nreloc;
 832
 833     /* set coff relocation */
 834     relocs = malloc(sizeof(struct coff_rel) * nb_relocs);
 835     for (i = 0, ext_rel = coff_relocs, rel = relocs; i < nb_relocs;
 836          i++, ext_rel++, rel++) {
 837         memset(rel, 0, sizeof(*rel));
 838         rel->r_reloc = ext_rel;
 839         rel->r_offset = *(uint32_t *)ext_rel->r_vaddr;
 840         rel->r_type = *(uint16_t *)ext_rel->r_type;
 841     }
 842     return 0;
 843 }
 844
 845 #endif /* CONFIG_FORMAT_COFF */
 846
 847 #ifdef CONFIG_FORMAT_MACH
 848
 849 /* File Header */
 850 struct mach_header      mach_hdr;
 851
 852 /* commands */
 853 struct segment_command  *segment = 0;
 854 struct dysymtab_command *dysymtabcmd = 0;
 855 struct symtab_command   *symtabcmd = 0;
 856
 857 /* section */
 858 struct section  *section_hdr;
 859 struct section *text_sec_hdr;
 860 uint8_t         **sdata;
 861
 862 /* relocs */
 863 struct relocation_info *relocs;
 864
 865 /* symbols */
 866 EXE_SYM                 *symtab;
 867 struct nlist    *symtab_std;
 868 char                    *strtab;
 869
 870 /* indirect symbols */
 871 uint32_t        *tocdylib;
 872
 873 /* Utility functions */
 874
 875 static inline char *find_str_by_index(int index)
 876 {
 877     return strtab+index;
 878 }
 879
 880 /* Used by dyngen common code */
 881 static char *get_sym_name(EXE_SYM *sym)
 882 {
 883         char *name = find_str_by_index(sym->n_un.n_strx);
 884
 885         if ( sym->n_type & N_STAB ) /* Debug symbols are ignored */
 886                 return "debug";
 887
 888         if(!name)
 889                 return name;
 890         if(name[0]=='_')
 891                 return name + 1;
 892         else
 893                 return name;
 894 }
 895
 896 /* find a section index given its segname, sectname */
 897 static int find_mach_sec_index(struct section *section_hdr, int shnum, const char *segname,
 898                                   const char *sectname)
 899 {
 900     int i;
 901     struct section *sec = section_hdr;
 902
 903     for(i = 0; i < shnum; i++, sec++) {
 904         if (!sec->segname || !sec->sectname)
 905             continue;
 906         if (!strcmp(sec->sectname, sectname) && !strcmp(sec->segname, segname))
 907             return i;
 908     }
 909     return -1;
 910 }
 911
 912 /* find a section header given its segname, sectname */
 913 struct section *find_mach_sec_hdr(struct section *section_hdr, int shnum, const char *segname,
 914                                   const char *sectname)
 915 {
 916     int index = find_mach_sec_index(section_hdr, shnum, segname, sectname);
 917         if(index == -1)
 918                 return NULL;
 919         return section_hdr+index;
 920 }
 921
 922
 923 static inline void fetch_next_pair_value(struct relocation_info * rel, unsigned int *value)
 924 {
 925     struct scattered_relocation_info * scarel;
 926
 927     if(R_SCATTERED & rel->r_address) {
 928         scarel = (struct scattered_relocation_info*)rel;
 929         if(scarel->r_type != PPC_RELOC_PAIR)
 930             error("fetch_next_pair_value: looking for a pair which was not found (1)");
 931         *value = scarel->r_value;
 932     } else {
 933                 if(rel->r_type != PPC_RELOC_PAIR)
 934                         error("fetch_next_pair_value: looking for a pair which was not found (2)");
 935                 *value = rel->r_address;
 936         }
 937 }
 938
 939 /* find a sym name given its value, in a section number */
 940 static const char * find_sym_with_value_and_sec_number( int value, int sectnum, int * offset )
 941 {
 942         int i, ret = -1;
 943
 944         for( i = 0 ; i < nb_syms; i++ )
 945         {
 946             if( !(symtab[i].n_type & N_STAB) && (symtab[i].n_type & N_SECT) &&
 947                          (symtab[i].n_sect ==  sectnum) && (symtab[i].st_value <= value) )
 948                 {
 949                         if( (ret<0) || (symtab[i].st_value >= symtab[ret].st_value) )
 950                                 ret = i;
 951                 }
 952         }
 953         if( ret < 0 ) {
 954                 *offset = 0;
 955                 return 0;
 956         } else {
 957                 *offset = value - symtab[ret].st_value;
 958                 return get_sym_name(&symtab[ret]);
 959         }
 960 }
 961
 962 /*
 963  *  Find symbol name given a (virtual) address, and a section which is of type
 964  *  S_NON_LAZY_SYMBOL_POINTERS or S_LAZY_SYMBOL_POINTERS or S_SYMBOL_STUBS
 965  */
 966 static const char * find_reloc_name_in_sec_ptr(int address, struct section * sec_hdr)
 967 {
 968     unsigned int tocindex, symindex, size;
 969     const char *name = 0;
 970
 971     /* Sanity check */
 972     if(!( address >= sec_hdr->addr && address < (sec_hdr->addr + sec_hdr->size) ) )
 973         return (char*)0;
 974
 975         if( sec_hdr->flags & S_SYMBOL_STUBS ){
 976                 size = sec_hdr->reserved2;
 977                 if(size == 0)
 978                     error("size = 0");
 979
 980         }
 981         else if( sec_hdr->flags & S_LAZY_SYMBOL_POINTERS ||
 982                     sec_hdr->flags & S_NON_LAZY_SYMBOL_POINTERS)
 983                 size = sizeof(unsigned long);
 984         else
 985                 return 0;
 986
 987     /* Compute our index in toc */
 988         tocindex = (address - sec_hdr->addr)/size;
 989         symindex = tocdylib[sec_hdr->reserved1 + tocindex];
 990
 991         name = get_sym_name(&symtab[symindex]);
 992
 993     return name;
 994 }
 995
 996 static const char * find_reloc_name_given_its_address(int address)
 997 {
 998     unsigned int i;
 999     for(i = 0; i < segment->nsects ; i++)
1000     {
1001         const char * name = find_reloc_name_in_sec_ptr(address, &section_hdr[i]);
1002         if((long)name != -1)
1003             return name;
1004     }
1005     return 0;
1006 }
1007
1008 static const char * get_reloc_name(EXE_RELOC * rel, int * sslide)
1009 {
1010         char * name = 0;
1011         struct scattered_relocation_info * sca_rel = (struct scattered_relocation_info*)rel;
1012         int sectnum = rel->r_symbolnum;
1013         int sectoffset;
1014         int other_half=0;
1015
1016         /* init the slide value */
1017         *sslide = 0;
1018
1019         if(R_SCATTERED & rel->r_address)
1020                 return (char *)find_reloc_name_given_its_address(sca_rel->r_value);
1021
1022         if(rel->r_extern)
1023         {
1024                 /* ignore debug sym */
1025                 if ( symtab[rel->r_symbolnum].n_type & N_STAB )
1026                         return 0;
1027                 return get_sym_name(&symtab[rel->r_symbolnum]);
1028         }
1029
1030         /* Intruction contains an offset to the symbols pointed to, in the rel->r_symbolnum section */
1031         sectoffset = *(uint32_t *)(text + rel->r_address) & 0xffff;
1032
1033         if(sectnum==0xffffff)
1034                 return 0;
1035
1036         /* Sanity Check */
1037         if(sectnum > segment->nsects)
1038                 error("sectnum > segment->nsects");
1039
1040         switch(rel->r_type)
1041         {
1042                 case PPC_RELOC_LO16: fetch_next_pair_value(rel+1, &other_half); sectoffset |= (other_half << 16);
1043                         break;
1044                 case PPC_RELOC_HI16: fetch_next_pair_value(rel+1, &other_half); sectoffset = (sectoffset << 16) | (uint16_t)(other_half & 0xffff);
1045                         break;
1046                 case PPC_RELOC_HA16: fetch_next_pair_value(rel+1, &other_half); sectoffset = (sectoffset << 16) + (int16_t)(other_half & 0xffff);
1047                         break;
1048                 case PPC_RELOC_BR24:
1049                         sectoffset = ( *(uint32_t *)(text + rel->r_address) & 0x03fffffc );
1050                         if (sectoffset & 0x02000000) sectoffset |= 0xfc000000;
1051                         break;
1052                 default:
1053                         error("switch(rel->type) not found");
1054         }
1055
1056         if(rel->r_pcrel)
1057                 sectoffset += rel->r_address;
1058
1059         if (rel->r_type == PPC_RELOC_BR24)
1060                 name = (char *)find_reloc_name_in_sec_ptr((int)sectoffset, &section_hdr[sectnum-1]);
1061
1062         /* search it in the full symbol list, if not found */
1063         if(!name)
1064                 name = (char *)find_sym_with_value_and_sec_number(sectoffset, sectnum, sslide);
1065
1066         return name;
1067 }
1068
1069 /* Used by dyngen common code */
1070 static const char * get_rel_sym_name(EXE_RELOC * rel)
1071 {
1072         int sslide;
1073         return get_reloc_name( rel, &sslide);
1074 }
1075
1076 /* Used by dyngen common code */
1077 static host_ulong get_rel_offset(EXE_RELOC *rel)
1078 {
1079         struct scattered_relocation_info * sca_rel = (struct scattered_relocation_info*)rel;
1080     if(R_SCATTERED & rel->r_address)
1081                 return sca_rel->r_address;
1082         else
1083                 return rel->r_address;
1084 }
1085
1086 /* load a mach-o object file */
1087 int load_object(const char *filename)
1088 {
1089         int fd;
1090         unsigned int offset_to_segment = 0;
1091     unsigned int offset_to_dysymtab = 0;
1092     unsigned int offset_to_symtab = 0;
1093     struct load_command lc;
1094     unsigned int i, j;
1095         EXE_SYM *sym;
1096         struct nlist *syment;
1097
1098         fd = open(filename, O_RDONLY);
1099     if (fd < 0)
1100         error("can't open file '%s'", filename);
1101
1102     /* Read Mach header.  */
1103     if (read(fd, &mach_hdr, sizeof (mach_hdr)) != sizeof (mach_hdr))
1104         error("unable to read file header");
1105
1106     /* Check Mach identification.  */
1107     if (!check_mach_header(mach_hdr)) {
1108         error("bad Mach header");
1109     }
1110
1111     if (mach_hdr.cputype != CPU_TYPE_POWERPC)
1112         error("Unsupported CPU");
1113
1114     if (mach_hdr.filetype != MH_OBJECT)
1115         error("Unsupported Mach Object");
1116
1117     /* read segment headers */
1118     for(i=0, j=sizeof(mach_hdr); i<mach_hdr.ncmds ; i++)
1119     {
1120         if(read(fd, &lc, sizeof(struct load_command)) != sizeof(struct load_command))
1121             error("unable to read load_command");
1122         if(lc.cmd == LC_SEGMENT)
1123         {
1124             offset_to_segment = j;
1125             lseek(fd, offset_to_segment, SEEK_SET);
1126             segment = malloc(sizeof(struct segment_command));
1127             if(read(fd, segment, sizeof(struct segment_command)) != sizeof(struct segment_command))
1128                 error("unable to read LC_SEGMENT");
1129         }
1130         if(lc.cmd == LC_DYSYMTAB)
1131         {
1132             offset_to_dysymtab = j;
1133             lseek(fd, offset_to_dysymtab, SEEK_SET);
1134             dysymtabcmd = malloc(sizeof(struct dysymtab_command));
1135             if(read(fd, dysymtabcmd, sizeof(struct dysymtab_command)) != sizeof(struct dysymtab_command))
1136                 error("unable to read LC_DYSYMTAB");
1137         }
1138         if(lc.cmd == LC_SYMTAB)
1139         {
1140             offset_to_symtab = j;
1141             lseek(fd, offset_to_symtab, SEEK_SET);
1142             symtabcmd = malloc(sizeof(struct symtab_command));
1143             if(read(fd, symtabcmd, sizeof(struct symtab_command)) != sizeof(struct symtab_command))
1144                 error("unable to read LC_SYMTAB");
1145         }
1146         j+=lc.cmdsize;
1147
1148         lseek(fd, j, SEEK_SET);
1149     }
1150
1151     if(!segment)
1152         error("unable to find LC_SEGMENT");
1153
1154     /* read section headers */
1155     section_hdr = load_data(fd, offset_to_segment + sizeof(struct segment_command), segment->nsects * sizeof(struct section));
1156
1157     /* read all section data */
1158     sdata = (uint8_t **)malloc(sizeof(void *) * segment->nsects);
1159     memset(sdata, 0, sizeof(void *) * segment->nsects);
1160
1161         /* Load the data in section data */
1162         for(i = 0; i < segment->nsects; i++) {
1163         sdata[i] = load_data(fd, section_hdr[i].offset, section_hdr[i].size);
1164     }
1165
1166     /* text section */
1167         text_sec_hdr = find_mach_sec_hdr(section_hdr, segment->nsects, SEG_TEXT, SECT_TEXT);
1168         i = find_mach_sec_index(section_hdr, segment->nsects, SEG_TEXT, SECT_TEXT);
1169         if (i == -1 || !text_sec_hdr)
1170         error("could not find __TEXT,__text section");
1171     text = sdata[i];
1172
1173     /* Make sure dysym was loaded */
1174     if(!(int)dysymtabcmd)
1175         error("could not find __DYSYMTAB segment");
1176
1177     /* read the table of content of the indirect sym */
1178     tocdylib = load_data( fd, dysymtabcmd->indirectsymoff, dysymtabcmd->nindirectsyms * sizeof(uint32_t) );
1179
1180     /* Make sure symtab was loaded  */
1181     if(!(int)symtabcmd)
1182         error("could not find __SYMTAB segment");
1183     nb_syms = symtabcmd->nsyms;
1184
1185     symtab_std = load_data(fd, symtabcmd->symoff, symtabcmd->nsyms * sizeof(struct nlist));
1186     strtab = load_data(fd, symtabcmd->stroff, symtabcmd->strsize);
1187
1188         symtab = malloc(sizeof(EXE_SYM) * nb_syms);
1189
1190         /* Now transform the symtab, to an extended version, with the sym size, and the C name */
1191         for(i = 0, sym = symtab, syment = symtab_std; i < nb_syms; i++, sym++, syment++) {
1192         struct nlist *sym_follow, *sym_next = 0;
1193         unsigned int j;
1194                 memset(sym, 0, sizeof(*sym));
1195
1196                 if ( syment->n_type & N_STAB ) /* Debug symbols are skipped */
1197             continue;
1198
1199                 memcpy(sym, syment, sizeof(*syment));
1200
1201                 /* Find the following symbol in order to get the current symbol size */
1202         for(j = 0, sym_follow = symtab_std; j < nb_syms; j++, sym_follow++) {
1203             if ( sym_follow->n_sect != 1 || sym_follow->n_type & N_STAB || !(sym_follow->n_value > sym->st_value))
1204                 continue;
1205             if(!sym_next) {
1206                 sym_next = sym_follow;
1207                 continue;
1208             }
1209             if(!(sym_next->n_value > sym_follow->n_value))
1210                 continue;
1211             sym_next = sym_follow;
1212         }
1213                 if(sym_next)
1214             sym->st_size = sym_next->n_value - sym->st_value;
1215                 else
1216             sym->st_size = text_sec_hdr->size - sym->st_value;
1217         }
1218
1219     /* Find Reloc */
1220     relocs = load_data(fd, text_sec_hdr->reloff, text_sec_hdr->nreloc * sizeof(struct relocation_info));
1221     nb_relocs = text_sec_hdr->nreloc;
1222
1223         close(fd);
1224         return 0;
1225 }
1226
1227 #endif /* CONFIG_FORMAT_MACH */
1228
1229 /* return true if the expression is a label reference */
1230 static int get_reloc_expr(char *name, int name_size, const char *sym_name)
1231 {
1232     const char *p;
1233
1234     if (strstart(sym_name, "__op_param", &p)) {
1235         snprintf(name, name_size, "param%s", p);
1236     } else if (strstart(sym_name, "__op_gen_label", &p)) {
1237         snprintf(name, name_size, "param%s", p);
1238         return 1;
1239     } else {
1240 #if defined(HOST_SPARC) || defined(HOST_HPPA)
1241         if (sym_name[0] == '.')
1242             snprintf(name, name_size,
1243                      "(long)(&__dot_%s)",
1244                      sym_name + 1);
1245         else
1246 #endif
1247             snprintf(name, name_size, "(long)(&%s)", sym_name);
1248     }
1249     return 0;
1250 }
1251
1252 #ifdef HOST_IA64
1253
1254 #define PLT_ENTRY_SIZE  16      /* 1 bundle containing "brl" */
1255
1256 struct plt_entry {
1257     struct plt_entry *next;
1258     const char *name;
1259     unsigned long addend;
1260 } *plt_list;
1261
1262 static int
1263 get_plt_index (const char *name, unsigned long addend)
1264 {
1265     struct plt_entry *plt, *prev= NULL;
1266     int index = 0;
1267
1268     /* see if we already have an entry for this target: */
1269     for (plt = plt_list; plt; ++index, prev = plt, plt = plt->next)
1270         if (strcmp(plt->name, name) == 0 && plt->addend == addend)
1271             return index;
1272
1273     /* nope; create a new PLT entry: */
1274
1275     plt = malloc(sizeof(*plt));
1276     if (!plt) {
1277         perror("malloc");
1278         exit(1);
1279     }
1280     memset(plt, 0, sizeof(*plt));
1281     plt->name = strdup(name);
1282     plt->addend = addend;
1283
1284     /* append to plt-list: */
1285     if (prev)
1286         prev->next = plt;
1287     else
1288         plt_list = plt;
1289     return index;
1290 }
1291
1292 #endif
1293
1294 #define MAX_ARGS 3
1295
1296 /* generate op code */
1297 static void gen_code(const char *name, host_ulong offset, host_ulong size,
1298                      FILE *outfile, int gen_switch)
1299 {
1300     int copy_size = 0;
1301     uint8_t *p_start, *p_end;
1302     host_ulong start_offset;
1303     int nb_args, i, n;
1304     uint8_t args_present[MAX_ARGS];
1305     const char *sym_name, *p;
1306     EXE_RELOC *rel;
1307
1308     /* Compute exact size excluding prologue and epilogue instructions.
1309      * Increment start_offset to skip epilogue instructions, then compute
1310      * copy_size the indicate the size of the remaining instructions (in
1311      * bytes).
1312      */
1313     p_start = text + offset;
1314     p_end = p_start + size;
1315     start_offset = offset;
1316 #if defined(HOST_I386) || defined(HOST_X86_64)
1317 #ifdef CONFIG_FORMAT_COFF
1318     {
1319         uint8_t *p;
1320         p = p_end - 1;
1321         if (p == p_start)
1322             error("empty code for %s", name);
1323         while (*p != 0xc3) {
1324             p--;
1325             if (p <= p_start)
1326                 error("ret or jmp expected at the end of %s", name);
1327         }
1328         copy_size = p - p_start;
1329     }
1330 #else
1331     {
1332         int len;
1333         len = p_end - p_start;
1334         if (len == 0)
1335             error("empty code for %s", name);
1336         if (p_end[-1] == 0xc3) {
1337             len--;
1338         } else {
1339             error("ret or jmp expected at the end of %s", name);
1340         }
1341         copy_size = len;
1342     }
1343 #endif
1344 #elif defined(HOST_PPC)
1345     {
1346         uint8_t *p;
1347         p = (void *)(p_end - 4);
1348         if (p == p_start)
1349             error("empty code for %s", name);
1350         if (get32((uint32_t *)p) != 0x4e800020)
1351             error("blr expected at the end of %s", name);
1352         copy_size = p - p_start;
1353     }
1354 #elif defined(HOST_S390)
1355     {
1356         uint8_t *p;
1357         p = (void *)(p_end - 2);
1358         if (p == p_start)
1359             error("empty code for %s", name);
1360         if ((get16((uint16_t *)p) & 0xfff0) != 0x07f0)
1361             error("br expected at the end of %s", name);
1362         copy_size = p - p_start;
1363     }
1364 #elif defined(HOST_ALPHA)
1365     {
1366         uint8_t *p;
1367         p = p_end - 4;
1368 #if 0
1369         /* XXX: check why it occurs */
1370         if (p == p_start)
1371             error("empty code for %s", name);
1372 #endif
1373         if (get32((uint32_t *)p) != 0x6bfa8001)
1374             error("ret expected at the end of %s", name);
1375         copy_size = p - p_start;
1376     }
1377 #elif defined(HOST_IA64)
1378     {
1379         uint8_t *p;
1380         p = (void *)(p_end - 4);
1381         if (p == p_start)
1382             error("empty code for %s", name);
1383         /* br.ret.sptk.many b0;; */
1384         /* 08 00 84 00 */
1385         if (get32((uint32_t *)p) != 0x00840008)
1386             error("br.ret.sptk.many b0;; expected at the end of %s", name);
1387         copy_size = p_end - p_start;
1388     }
1389 #elif defined(HOST_SPARC)
1390     {
1391 #define INSN_SAVE       0x9de3a000
1392 #define INSN_RET        0x81c7e008
1393 #define INSN_RETL       0x81c3e008
1394 #define INSN_RESTORE    0x81e80000
1395 #define INSN_RETURN     0x81cfe008
1396 #define INSN_NOP        0x01000000
1397 #define INSN_ADD_SP     0x9c03a000 // add %sp, nn, %sp
1398 #define INSN_SUB_SP     0x9c23a000 // sub %sp, nn, %sp
1399
1400         uint32_t start_insn, end_insn1, end_insn2;
1401         uint8_t *p;
1402         p = (void *)(p_end - 8);
1403         if (p <= p_start)
1404             error("empty code for %s", name);
1405         start_insn = get32((uint32_t *)(p_start + 0x0));
1406         end_insn1 = get32((uint32_t *)(p + 0x0));
1407         end_insn2 = get32((uint32_t *)(p + 0x4));
1408         if (((start_insn & ~0x1fff) == INSN_SAVE) ||
1409             (start_insn & ~0x1fff) == INSN_ADD_SP) {
1410             p_start += 0x4;
1411             start_offset += 0x4;
1412             if (end_insn1 == INSN_RET && end_insn2 == INSN_RESTORE)
1413                 /* SPARC v7: ret; restore; */ ;
1414             else if (end_insn1 == INSN_RETURN && end_insn2 == INSN_NOP)
1415                 /* SPARC v9: return; nop; */ ;
1416             else if (end_insn1 == INSN_RETL && (end_insn2 & ~0x1fff) == INSN_SUB_SP)
1417                 /* SPARC v7: retl; sub %sp, nn, %sp; */ ;
1418             else
1419
1420                 error("ret; restore; not found at end of %s", name);
1421         } else if (end_insn1 == INSN_RETL && end_insn2 == INSN_NOP) {
1422             ;
1423         } else {
1424             error("No save at the beginning of %s", name);
1425         }
1426 #if 0
1427         /* Skip a preceeding nop, if present.  */
1428         if (p > p_start) {
1429             skip_insn = get32((uint32_t *)(p - 0x4));
1430             if (skip_insn == INSN_NOP)
1431                 p -= 4;
1432         }
1433 #endif
1434         copy_size = p - p_start;
1435     }
1436 #elif defined(HOST_SPARC64)
1437     {
1438 #define INSN_SAVE       0x9de3a000
1439 #define INSN_RET        0x81c7e008
1440 #define INSN_RETL       0x81c3e008
1441 #define INSN_RESTORE    0x81e80000
1442 #define INSN_RETURN     0x81cfe008
1443 #define INSN_NOP        0x01000000
1444 #define INSN_ADD_SP     0x9c03a000 // add %sp, nn, %sp
1445 #define INSN_SUB_SP     0x9c23a000 // sub %sp, nn, %sp
1446
1447         uint32_t start_insn, end_insn1, end_insn2, skip_insn;
1448         uint8_t *p;
1449         p = (void *)(p_end - 8);
1450 #if 0
1451         /* XXX: check why it occurs */
1452         if (p <= p_start)
1453             error("empty code for %s", name);
1454 #endif
1455         start_insn = get32((uint32_t *)(p_start + 0x0));
1456         end_insn1 = get32((uint32_t *)(p + 0x0));
1457         end_insn2 = get32((uint32_t *)(p + 0x4));
1458         if (((start_insn & ~0x1fff) == INSN_SAVE) ||
1459             (start_insn & ~0x1fff) == INSN_ADD_SP) {
1460             p_start += 0x4;
1461             start_offset += 0x4;
1462             if (end_insn1 == INSN_RET && end_insn2 == INSN_RESTORE)
1463                 /* SPARC v7: ret; restore; */ ;
1464             else if (end_insn1 == INSN_RETURN && end_insn2 == INSN_NOP)
1465                 /* SPARC v9: return; nop; */ ;
1466             else if (end_insn1 == INSN_RETL && (end_insn2 & ~0x1fff) == INSN_SUB_SP)
1467                 /* SPARC v7: retl; sub %sp, nn, %sp; */ ;
1468             else
1469
1470                 error("ret; restore; not found at end of %s", name);
1471         } else if (end_insn1 == INSN_RETL && end_insn2 == INSN_NOP) {
1472             ;
1473         } else {
1474             error("No save at the beginning of %s", name);
1475         }
1476
1477 #if 0
1478         /* Skip a preceeding nop, if present.  */
1479         if (p > p_start) {
1480             skip_insn = get32((uint32_t *)(p - 0x4));
1481             if (skip_insn == 0x01000000)
1482                 p -= 4;
1483         }
1484 #endif
1485
1486         copy_size = p - p_start;
1487     }
1488 #elif defined(HOST_M68K)
1489     {
1490         uint8_t *p;
1491         p = (void *)(p_end - 2);
1492         if (p == p_start)
1493             error("empty code for %s", name);
1494         // remove NOP's, probably added for alignment
1495         while ((get16((uint16_t *)p) == 0x4e71) &&
1496                (p>p_start))
1497             p -= 2;
1498         if (get16((uint16_t *)p) != 0x4e75)
1499             error("rts expected at the end of %s", name);
1500         copy_size = p - p_start;
1501     }
1502 #elif defined(HOST_HPPA)
1503     {
1504         uint8_t *p;
1505         p = p_start;
1506         while (p < p_end) {
1507             uint32_t insn = get32((uint32_t *)p);
1508             if (insn == 0x6bc23fd9 ||                /* stw rp,-14(sp) */
1509                 insn == 0x08030241 ||                /* copy r3,r1 */
1510                 insn == 0x081e0243 ||                /* copy sp,r3 */
1511                 (insn & 0xffffc000) == 0x37de0000 || /* ldo x(sp),sp */
1512                 (insn & 0xffffc000) == 0x6fc10000)   /* stwm r1,x(sp) */
1513                 p += 4;
1514             else
1515                 break;
1516         }
1517         start_offset += p - p_start;
1518         p_start = p;
1519         p = p_end - 4;
1520
1521         while (p > p_start) {
1522             uint32_t insn = get32((uint32_t *)p);
1523             if ((insn & 0xffffc000) == 0x347e0000 || /* ldo x(r3),sp */
1524                 (insn & 0xffe0c000) == 0x4fc00000 || /* ldwm x(sp),rx */
1525                 (insn & 0xffffc000) == 0x37de0000 || /* ldo x(sp),sp */
1526                 insn == 0x48623fd9 ||                /* ldw -14(r3),rp */
1527                 insn == 0xe840c000 ||                /* bv r0(rp) */
1528                 insn == 0xe840c002)                  /* bv,n r0(rp) */
1529                 p -= 4;
1530             else
1531                 break;
1532         }
1533         p += 4;
1534         if (p <= p_start)
1535             error("empty code for %s", name);
1536
1537         copy_size = p - p_start;
1538     }
1539 #elif defined(HOST_MIPS) || defined(HOST_MIPS64)
1540     {
1541 #define INSN_RETURN     0x03e00008
1542 #define INSN_NOP        0x00000000
1543
1544         uint8_t *p = p_end;
1545
1546         if (p < (p_start + 0x8)) {
1547             error("empty code for %s", name);
1548         } else {
1549             uint32_t end_insn1, end_insn2;
1550
1551             p -= 0x8;
1552             end_insn1 = get32((uint32_t *)(p + 0x0));
1553             end_insn2 = get32((uint32_t *)(p + 0x4));
1554             if (end_insn1 != INSN_RETURN && end_insn2 != INSN_NOP)
1555                 error("jr ra not found at end of %s", name);
1556         }
1557         copy_size = p - p_start;
1558     }
1559 #elif defined(HOST_ARM)
1560     error("dyngen targets not supported on ARM");
1561 #elif defined(HOST_PPC64)
1562     error("dyngen targets not supported on PPC64");
1563 #else
1564 #error unsupported CPU
1565 #endif
1566
1567     /* compute the number of arguments by looking at the relocations */
1568     for(i = 0;i < MAX_ARGS; i++)
1569         args_present[i] = 0;
1570
1571     for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1572         host_ulong offset = get_rel_offset(rel);
1573         if (offset >= start_offset &&
1574             offset < start_offset + (p_end - p_start)) {
1575             sym_name = get_rel_sym_name(rel);
1576             if(!sym_name)
1577                 continue;
1578             if (strstart(sym_name, "__op_param", &p) ||
1579                 strstart(sym_name, "__op_gen_label", &p)) {
1580                 n = strtoul(p, NULL, 10);
1581                 if (n > MAX_ARGS)
1582                     error("too many arguments in %s", name);
1583                 args_present[n - 1] = 1;
1584             }
1585         }
1586     }
1587
1588     nb_args = 0;
1589     while (nb_args < MAX_ARGS && args_present[nb_args])
1590         nb_args++;
1591     for(i = nb_args; i < MAX_ARGS; i++) {
1592         if (args_present[i])
1593             error("inconsistent argument numbering in %s", name);
1594     }
1595
1596     if (gen_switch == 2) {
1597
1598 #if defined(HOST_HPPA)
1599         int op_size = copy_size;
1600         int has_stubs = 0;
1601         char relname[256];
1602         int type, is_label;
1603
1604         for (i = 0, rel = relocs; i < nb_relocs; i++, rel++) {
1605             if (rel->r_offset >= start_offset &&
1606                 rel->r_offset < start_offset + copy_size) {
1607                 sym_name = get_rel_sym_name(rel);
1608                 sym_name = strtab + symtab[ELF32_R_SYM(rel->r_info)].st_name;
1609                 is_label = get_reloc_expr(relname, sizeof(relname), sym_name);
1610                 type = ELF32_R_TYPE(rel->r_info);
1611
1612                 if (!is_label && type == R_PARISC_PCREL17F) {
1613                     has_stubs = 1;
1614                     op_size += 8; /* ldil and be,n instructions */
1615                 }
1616             }
1617         }
1618
1619         if (has_stubs)
1620             op_size += 4; /* b,l,n instruction, to skip past the stubs */
1621
1622         fprintf(outfile, "DEF(%s, %d, %d)\n", name + 3, nb_args, op_size);
1623 #else
1624         fprintf(outfile, "DEF(%s, %d, %d)\n", name + 3, nb_args, copy_size);
1625 #endif
1626
1627     } else if (gen_switch == 1) {
1628
1629         /* output C code */
1630         fprintf(outfile, "case INDEX_%s: {\n", name);
1631         if (nb_args > 0) {
1632             fprintf(outfile, "    long ");
1633             for(i = 0; i < nb_args; i++) {
1634                 if (i != 0)
1635                     fprintf(outfile, ", ");
1636                 fprintf(outfile, "param%d", i + 1);
1637             }
1638             fprintf(outfile, ";\n");
1639         }
1640 #if defined(HOST_IA64)
1641         fprintf(outfile, "    extern char %s;\n", name);
1642 #else
1643         fprintf(outfile, "    extern void %s();\n", name);
1644 #endif
1645
1646         for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1647             host_ulong offset = get_rel_offset(rel);
1648             if (offset >= start_offset &&
1649                 offset < start_offset + (p_end - p_start)) {
1650                 sym_name = get_rel_sym_name(rel);
1651                 if(!sym_name)
1652                     continue;
1653                 if (*sym_name &&
1654                     !strstart(sym_name, "__op_param", NULL) &&
1655                     !strstart(sym_name, "__op_jmp", NULL) &&
1656                     !strstart(sym_name, "__op_gen_label", NULL)) {
1657 #if defined(HOST_SPARC) || defined(HOST_HPPA)
1658                     if (sym_name[0] == '.') {
1659                         fprintf(outfile,
1660                                 "extern char __dot_%s __asm__(\"%s\");\n",
1661                                 sym_name+1, sym_name);
1662                         continue;
1663                     }
1664 #endif
1665 #if defined(__APPLE__)
1666                     /* Set __attribute((unused)) on darwin because we
1667                        want to avoid warning when we don't use the symbol.  */
1668                     fprintf(outfile, "    extern char %s __attribute__((unused));\n", sym_name);
1669 #elif defined(HOST_IA64)
1670                         if (ELF64_R_TYPE(rel->r_info) != R_IA64_PCREL21B)
1671                                 /*
1672                                  * PCREL21 br.call targets generally
1673                                  * are out of range and need to go
1674                                  * through an "import stub".
1675                                  */
1676                                 fprintf(outfile, "    extern char %s;\n",
1677                                         sym_name);
1678 #else
1679                     fprintf(outfile, "extern char %s;\n", sym_name);
1680 #endif
1681                 }
1682             }
1683         }
1684
1685 #ifdef __hppa__
1686         fprintf(outfile, "    memcpy(gen_code_ptr, (void *)((char *)__canonicalize_funcptr_for_compare(%s)+%d), %d);\n",
1687                                         name, (int)(start_offset - offset), copy_size);
1688 #else
1689         fprintf(outfile, "    memcpy(gen_code_ptr, (void *)((char *)&%s+%d), %d);\n",
1690                                         name, (int)(start_offset - offset), copy_size);
1691 #endif
1692
1693         /* emit code offset information */
1694         {
1695             EXE_SYM *sym;
1696             const char *sym_name, *p;
1697             host_ulong val;
1698             int n;
1699
1700             for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
1701                 sym_name = get_sym_name(sym);
1702                 if (strstart(sym_name, "__op_label", &p)) {
1703                     uint8_t *ptr;
1704                     unsigned long offset;
1705
1706                     /* test if the variable refers to a label inside
1707                        the code we are generating */
1708 #ifdef CONFIG_FORMAT_COFF
1709                     if (sym->st_shndx == text_shndx) {
1710                         ptr = sdata[coff_text_shndx];
1711                     } else if (sym->st_shndx == data_shndx) {
1712                         ptr = sdata[coff_data_shndx];
1713                     } else {
1714                         ptr = NULL;
1715                     }
1716 #elif defined(CONFIG_FORMAT_MACH)
1717                     if(!sym->n_sect)
1718                         continue;
1719                     ptr = sdata[sym->n_sect-1];
1720 #else
1721                     ptr = sdata[sym->st_shndx];
1722 #endif
1723                     if (!ptr)
1724                         error("__op_labelN in invalid section");
1725                     offset = sym->st_value;
1726 #ifdef CONFIG_FORMAT_MACH
1727                     offset -= section_hdr[sym->n_sect-1].addr;
1728 #endif
1729                     val = *(host_ulong *)(ptr + offset);
1730 #ifdef ELF_USES_RELOCA
1731                     {
1732                         int reloc_shndx, nb_relocs1, j;
1733
1734                         /* try to find a matching relocation */
1735                         reloc_shndx = find_reloc(sym->st_shndx);
1736                         if (reloc_shndx) {
1737                             nb_relocs1 = shdr[reloc_shndx].sh_size /
1738                                 shdr[reloc_shndx].sh_entsize;
1739                             rel = (ELF_RELOC *)sdata[reloc_shndx];
1740                             for(j = 0; j < nb_relocs1; j++) {
1741                                 if (rel->r_offset == offset) {
1742                                     val = rel->r_addend;
1743                                     break;
1744                                 }
1745                                 rel++;
1746                             }
1747                         }
1748                     }
1749 #endif
1750                     if (val >= start_offset && val <= start_offset + copy_size) {
1751                         n = strtol(p, NULL, 10);
1752                         fprintf(outfile, "    label_offsets[%d] = %ld + (gen_code_ptr - gen_code_buf);\n", n, (long)(val - start_offset));
1753                     }
1754                 }
1755             }
1756         }
1757
1758         /* load parameters in variables */
1759         for(i = 0; i < nb_args; i++) {
1760             fprintf(outfile, "    param%d = *opparam_ptr++;\n", i + 1);
1761         }
1762
1763         /* patch relocations */
1764 #if defined(HOST_I386)
1765             {
1766                 char relname[256];
1767                 int type, is_label;
1768                 int addend;
1769                 int reloc_offset;
1770                 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1771                 if (rel->r_offset >= start_offset &&
1772                     rel->r_offset < start_offset + copy_size) {
1773                     sym_name = get_rel_sym_name(rel);
1774                     if (!sym_name)
1775                         continue;
1776                     reloc_offset = rel->r_offset - start_offset;
1777                     if (strstart(sym_name, "__op_jmp", &p)) {
1778                         int n;
1779                         n = strtol(p, NULL, 10);
1780                         /* __op_jmp relocations are done at
1781                            runtime to do translated block
1782                            chaining: the offset of the instruction
1783                            needs to be stored */
1784                         fprintf(outfile, "    jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
1785                                 n, reloc_offset);
1786                         continue;
1787                     }
1788
1789                     is_label = get_reloc_expr(relname, sizeof(relname), sym_name);
1790                     addend = get32((uint32_t *)(text + rel->r_offset));
1791 #ifdef CONFIG_FORMAT_ELF
1792                     type = ELF32_R_TYPE(rel->r_info);
1793                     if (is_label) {
1794                         switch(type) {
1795                         case R_386_32:
1796                         case R_386_PC32:
1797                             fprintf(outfile, "    tcg_out_reloc(s, gen_code_ptr + %d, %d, %s, %d);\n",
1798                                     reloc_offset, type, relname, addend);
1799                             break;
1800                         default:
1801                             error("unsupported i386 relocation (%d)", type);
1802                         }
1803                     } else {
1804                         switch(type) {
1805                         case R_386_32:
1806                             fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
1807                                     reloc_offset, relname, addend);
1808                             break;
1809                         case R_386_PC32:
1810                             fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d;\n",
1811                                     reloc_offset, relname, reloc_offset, addend);
1812                             break;
1813                         default:
1814                             error("unsupported i386 relocation (%d)", type);
1815                         }
1816                     }
1817 #elif defined(CONFIG_FORMAT_COFF)
1818                     {
1819                         char *temp_name;
1820                         int j;
1821                         EXE_SYM *sym;
1822                         temp_name = get_sym_name(symtab + *(uint32_t *)(rel->r_reloc->r_symndx));
1823                         if (!strcmp(temp_name, ".data")) {
1824                             for (j = 0, sym = symtab; j < nb_syms; j++, sym++) {
1825                                 if (strstart(sym->st_name, sym_name, NULL)) {
1826                                     addend -= sym->st_value;
1827                                 }
1828                             }
1829                         }
1830                     }
1831                     type = rel->r_type;
1832                     if (is_label) {
1833 /* TCG uses elf relocation constants */
1834 #define R_386_32        1
1835 #define R_386_PC32      2
1836                         switch(type) {
1837                         case DIR32:
1838                             type = R_386_32;
1839                             goto do_reloc;
1840                         case DISP32:
1841                             type = R_386_PC32;
1842                             addend -= 4;
1843                         do_reloc:
1844                             fprintf(outfile, "    tcg_out_reloc(s, gen_code_ptr + %d, %d, %s, %d);\n",
1845                                     reloc_offset, type, relname, addend);
1846                             break;
1847                         default:
1848                             error("unsupported i386 relocation (%d)", type);
1849                         }
1850                     } else {
1851                         switch(type) {
1852                         case DIR32:
1853                             fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
1854                                     reloc_offset, relname, addend);
1855                             break;
1856                         case DISP32:
1857                             fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d -4;\n",
1858                                     reloc_offset, relname, reloc_offset, addend);
1859                             break;
1860                         default:
1861                             error("unsupported i386 relocation (%d)", type);
1862                         }
1863                     }
1864 #else
1865 #error unsupport object format
1866 #endif
1867                 }
1868                 }
1869             }
1870 #elif defined(HOST_X86_64)
1871             {
1872                 char relname[256];
1873                 int type, is_label;
1874                 int addend;
1875                 int reloc_offset;
1876                 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1877                 if (rel->r_offset >= start_offset &&
1878                     rel->r_offset < start_offset + copy_size) {
1879                     sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
1880                     is_label = get_reloc_expr(relname, sizeof(relname), sym_name);
1881                     type = ELF32_R_TYPE(rel->r_info);
1882                     addend = rel->r_addend;
1883                     reloc_offset = rel->r_offset - start_offset;
1884                     if (is_label) {
1885                         switch(type) {
1886                         case R_X86_64_32:
1887                         case R_X86_64_32S:
1888                         case R_X86_64_PC32:
1889                             fprintf(outfile, "    tcg_out_reloc(s, gen_code_ptr + %d, %d, %s, %d);\n",
1890                                     reloc_offset, type, relname, addend);
1891                             break;
1892                         default:
1893                             error("unsupported X86_64 relocation (%d)", type);
1894                         }
1895                     } else {
1896                         switch(type) {
1897                         case R_X86_64_32:
1898                             fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = (uint32_t)%s + %d;\n",
1899                                     reloc_offset, relname, addend);
1900                             break;
1901                         case R_X86_64_32S:
1902                             fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = (int32_t)%s + %d;\n",
1903                                     reloc_offset, relname, addend);
1904                             break;
1905                         case R_X86_64_PC32:
1906                             fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d;\n",
1907                                     reloc_offset, relname, reloc_offset, addend);
1908                             break;
1909                         default:
1910                             error("unsupported X86_64 relocation (%d)", type);
1911                         }
1912                     }
1913                 }
1914                 }
1915             }
1916 #elif defined(HOST_PPC)
1917             {
1918 #ifdef CONFIG_FORMAT_ELF
1919                 char relname[256];
1920                 int type;
1921                 int addend;
1922                 int is_label;
1923                 int reloc_offset;
1924                 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1925                     if (rel->r_offset >= start_offset &&
1926                         rel->r_offset < start_offset + copy_size) {
1927                         sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
1928                         reloc_offset = rel->r_offset - start_offset;
1929                         if (strstart(sym_name, "__op_jmp", &p)) {
1930                             int n;
1931                             n = strtol(p, NULL, 10);
1932                             /* __op_jmp relocations are done at
1933                                runtime to do translated block
1934                                chaining: the offset of the instruction
1935                                needs to be stored */
1936                             fprintf(outfile, "    jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
1937                                     n, reloc_offset);
1938                             continue;
1939                         }
1940
1941                         get_reloc_expr(relname, sizeof(relname), sym_name);
1942                         type = ELF32_R_TYPE(rel->r_info);
1943                         is_label = get_reloc_expr(relname, sizeof(relname), sym_name);
1944                         addend = rel->r_addend;
1945                         if (is_label) {
1946                             switch (type) {
1947                             case R_PPC_REL24:
1948                                 fprintf (outfile, "    tcg_out_reloc(s, gen_code_ptr + %d, %d, %s, %d);\n",
1949                                          reloc_offset, type, relname, addend);
1950                                 break;
1951                             default:
1952                                 error ("unsupported ppc relocation (%d)", type);
1953                             }
1954                         }
1955                         else {
1956                             switch(type) {
1957                             case R_PPC_ADDR32:
1958                                 fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
1959                                         reloc_offset, relname, addend);
1960                                 break;
1961                             case R_PPC_ADDR16_LO:
1962                                 fprintf(outfile, "    *(uint16_t *)(gen_code_ptr + %d) = (%s + %d);\n",
1963                                         reloc_offset, relname, addend);
1964                                 break;
1965                             case R_PPC_ADDR16_HI:
1966                                 fprintf(outfile, "    *(uint16_t *)(gen_code_ptr + %d) = (%s + %d) >> 16;\n",
1967                                         reloc_offset, relname, addend);
1968                                 break;
1969                             case R_PPC_ADDR16_HA:
1970                                 fprintf(outfile, "    *(uint16_t *)(gen_code_ptr + %d) = (%s + %d + 0x8000) >> 16;\n",
1971                                         reloc_offset, relname, addend);
1972                                 break;
1973                             case R_PPC_REL24:
1974                                 /* warning: must be at 32 MB distancy */
1975                                 fprintf(outfile, "{\n"
1976                                         "    long disp = (%s - (long)(gen_code_ptr + %d) + %d);\n"
1977                                         "    if ((disp << 6) >> 6 != disp) {;\n"
1978                                         "        fprintf(stderr, \"Branch target is too far away\\n\");"
1979                                         "        abort();\n"
1980                                         "    }\n"
1981                                         "}\n",
1982                                         relname, reloc_offset, addend);
1983                                 fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | ((%s - (long)(gen_code_ptr + %d) + %d) & 0x03fffffc);\n",
1984                                         reloc_offset, reloc_offset, relname, reloc_offset, addend);
1985                                 break;
1986                             default:
1987                                 error("unsupported powerpc relocation (%d)", type);
1988                             }
1989                         }
1990                     }
1991                 }
1992 #elif defined(CONFIG_FORMAT_MACH)
1993                 struct scattered_relocation_info *scarel;
1994                 struct relocation_info * rel;
1995                 char final_sym_name[256];
1996                 const char *sym_name;
1997                 const char *p;
1998                 int slide, sslide;
1999                 int i;
2000
2001                 for(i = 0, rel = relocs; i < nb_relocs; i++, rel++) {
2002                     unsigned int offset, length, value = 0;
2003                     unsigned int type, pcrel, isym = 0;
2004                     unsigned int usesym = 0;
2005
2006                     if(R_SCATTERED & rel->r_address) {
2007                         scarel = (struct scattered_relocation_info*)rel;
2008                         offset = (unsigned int)scarel->r_address;
2009                         length = scarel->r_length;
2010                         pcrel = scarel->r_pcrel;
2011                         type = scarel->r_type;
2012                         value = scarel->r_value;
2013                     } else {
2014                         value = isym = rel->r_symbolnum;
2015                         usesym = (rel->r_extern);
2016                         offset = rel->r_address;
2017                         length = rel->r_length;
2018                         pcrel = rel->r_pcrel;
2019                         type = rel->r_type;
2020                     }
2021
2022                     slide = offset - start_offset;
2023
2024                     if (!(offset >= start_offset && offset < start_offset + size))
2025                         continue;  /* not in our range */
2026
2027                         sym_name = get_reloc_name(rel, &sslide);
2028
2029                         if(usesym && symtab[isym].n_type & N_STAB)
2030                             continue; /* don't handle STAB (debug sym) */
2031
2032                         if (sym_name && strstart(sym_name, "__op_jmp", &p)) {
2033                             int n;
2034                             n = strtol(p, NULL, 10);
2035                             fprintf(outfile, "    jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
2036                                     n, slide);
2037                             continue; /* Nothing more to do */
2038                         }
2039
2040                         if(!sym_name) {
2041                             fprintf(outfile, "/* #warning relocation not handled in %s (value 0x%x, %s, offset 0x%x, length 0x%x, %s, type 0x%x) */\n",
2042                                     name, value, usesym ? "use sym" : "don't use sym", offset, length, pcrel ? "pcrel":"", type);
2043                             continue; /* dunno how to handle without final_sym_name */
2044                         }
2045
2046                         get_reloc_expr(final_sym_name, sizeof(final_sym_name),
2047                                        sym_name);
2048                         switch(type) {
2049                         case PPC_RELOC_BR24:
2050                             if (!strstart(sym_name,"__op_gen_label",&p)) {
2051                                 fprintf(outfile, "{\n");
2052                                 fprintf(outfile, "    uint32_t imm = *(uint32_t *)(gen_code_ptr + %d) & 0x3fffffc;\n", slide);
2053                                 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",
2054                                         slide, slide, name, sslide);
2055                                 fprintf(outfile, "}\n");
2056                             } else {
2057                                 fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | (((long)%s - (long)gen_code_ptr - %d) & 0x03fffffc);\n",
2058                                         slide, slide, final_sym_name, slide);
2059                             }
2060                             break;
2061                         case PPC_RELOC_HI16:
2062                             fprintf(outfile, "    *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d) >> 16;\n",
2063                                     slide, final_sym_name, sslide);
2064                             break;
2065                         case PPC_RELOC_LO16:
2066                             fprintf(outfile, "    *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d);\n",
2067                                     slide, final_sym_name, sslide);
2068                             break;
2069                         case PPC_RELOC_HA16:
2070                             fprintf(outfile, "    *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d + 0x8000) >> 16;\n",
2071                                     slide, final_sym_name, sslide);
2072                             break;
2073                         default:
2074                             error("unsupported powerpc relocation (%d)", type);
2075                     }
2076                 }
2077 #else
2078 #error unsupport object format
2079 #endif
2080             }
2081 #elif defined(HOST_S390)
2082             {
2083                 char relname[256];
2084                 int type;
2085                 int addend;
2086                 int reloc_offset;
2087                 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2088                     if (rel->r_offset >= start_offset &&
2089                         rel->r_offset < start_offset + copy_size) {
2090                         sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
2091                         get_reloc_expr(relname, sizeof(relname), sym_name);
2092                         type = ELF32_R_TYPE(rel->r_info);
2093                         addend = rel->r_addend;
2094                         reloc_offset = rel->r_offset - start_offset;
2095                         switch(type) {
2096                         case R_390_32:
2097                             fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
2098                                     reloc_offset, relname, addend);
2099                             break;
2100                         case R_390_16:
2101                             fprintf(outfile, "    *(uint16_t *)(gen_code_ptr + %d) = %s + %d;\n",
2102                                     reloc_offset, relname, addend);
2103                             break;
2104                         case R_390_8:
2105                             fprintf(outfile, "    *(uint8_t *)(gen_code_ptr + %d) = %s + %d;\n",
2106                                     reloc_offset, relname, addend);
2107                             break;
2108                         case R_390_PC32DBL:
2109                             if (ELF32_ST_TYPE(symtab[ELFW(R_SYM)(rel->r_info)].st_info) == STT_SECTION) {
2110                                 fprintf(outfile,
2111                                         "    *(uint32_t *)(gen_code_ptr + %d) += "
2112                                         "((long)&%s - (long)gen_code_ptr) >> 1;\n",
2113                                         reloc_offset, name);
2114                             }
2115                             else
2116                                 fprintf(outfile,
2117                                         "    *(uint32_t *)(gen_code_ptr + %d) = "
2118                                         "(%s + %d - ((uint32_t)gen_code_ptr + %d)) >> 1;\n",
2119                                         reloc_offset, relname, addend, reloc_offset);
2120                             break;
2121                         default:
2122                             error("unsupported s390 relocation (%d)", type);
2123                         }
2124                     }
2125                 }
2126             }
2127 #elif defined(HOST_ALPHA)
2128             {
2129                 for (i = 0, rel = relocs; i < nb_relocs; i++, rel++) {
2130                     if (rel->r_offset >= start_offset && rel->r_offset < start_offset + copy_size) {
2131                         int type;
2132                         long reloc_offset;
2133
2134                         type = ELF64_R_TYPE(rel->r_info);
2135                         sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name;
2136                         reloc_offset = rel->r_offset - start_offset;
2137                         switch (type) {
2138                         case R_ALPHA_GPDISP:
2139                             /* The gp is just 32 bit, and never changes, so it's easiest to emit it
2140                                as an immediate instead of constructing it from the pv or ra.  */
2141                             fprintf(outfile, "    immediate_ldah(gen_code_ptr + %ld, gp);\n",
2142                                     reloc_offset);
2143                             fprintf(outfile, "    immediate_lda(gen_code_ptr + %ld, gp);\n",
2144                                     reloc_offset + (int)rel->r_addend);
2145                             break;
2146                         case R_ALPHA_LITUSE:
2147                             /* jsr to literal hint. Could be used to optimize to bsr. Ignore for
2148                                now, since some called functions (libc) need pv to be set up.  */
2149                             break;
2150                         case R_ALPHA_HINT:
2151                             /* Branch target prediction hint. Ignore for now.  Should be already
2152                                correct for in-function jumps.  */
2153                             break;
2154                         case R_ALPHA_LITERAL:
2155                             /* Load a literal from the GOT relative to the gp.  Since there's only a
2156                                single gp, nothing is to be done.  */
2157                             break;
2158                         case R_ALPHA_GPRELHIGH:
2159                             /* Handle fake relocations against __op_param symbol.  Need to emit the
2160                                high part of the immediate value instead.  Other symbols need no
2161                                special treatment.  */
2162                             if (strstart(sym_name, "__op_param", &p))
2163                                 fprintf(outfile, "    immediate_ldah(gen_code_ptr + %ld, param%s);\n",
2164                                         reloc_offset, p);
2165                             break;
2166                         case R_ALPHA_GPRELLOW:
2167                             if (strstart(sym_name, "__op_param", &p))
2168                                 fprintf(outfile, "    immediate_lda(gen_code_ptr + %ld, param%s);\n",
2169                                         reloc_offset, p);
2170                             break;
2171                         case R_ALPHA_BRSGP:
2172                             /* PC-relative jump. Tweak offset to skip the two instructions that try to
2173                                set up the gp from the pv.  */
2174                             fprintf(outfile, "    fix_bsr(gen_code_ptr + %ld, (uint8_t *) &%s - (gen_code_ptr + %ld + 4) + 8);\n",
2175                                     reloc_offset, sym_name, reloc_offset);
2176                             break;
2177                         default:
2178                             error("unsupported Alpha relocation (%d)", type);
2179                         }
2180                     }
2181                 }
2182             }
2183 #elif defined(HOST_IA64)
2184             {
2185                 unsigned long sym_idx;
2186                 long code_offset;
2187                 char relname[256];
2188                 int type;
2189                 long addend;
2190
2191                 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2192                     sym_idx = ELF64_R_SYM(rel->r_info);
2193                     if (rel->r_offset < start_offset
2194                         || rel->r_offset >= start_offset + copy_size)
2195                         continue;
2196                     sym_name = (strtab + symtab[sym_idx].st_name);
2197                     code_offset = rel->r_offset - start_offset;
2198                     if (strstart(sym_name, "__op_jmp", &p)) {
2199                         int n;
2200                         n = strtol(p, NULL, 10);
2201                         /* __op_jmp relocations are done at
2202                            runtime to do translated block
2203                            chaining: the offset of the instruction
2204                            needs to be stored */
2205                         fprintf(outfile, "    jmp_offsets[%d] ="
2206                                 "%ld + (gen_code_ptr - gen_code_buf);\n",
2207                                 n, code_offset);
2208                         continue;
2209                     }
2210                     get_reloc_expr(relname, sizeof(relname), sym_name);
2211                     type = ELF64_R_TYPE(rel->r_info);
2212                     addend = rel->r_addend;
2213                     switch(type) {
2214                       case R_IA64_IMM64:
2215                           fprintf(outfile,
2216                                   "    ia64_imm64(gen_code_ptr + %ld, "
2217                                   "%s + %ld);\n",
2218                                   code_offset, relname, addend);
2219                           break;
2220                       case R_IA64_LTOFF22X:
2221                       case R_IA64_LTOFF22:
2222                           fprintf(outfile, "    IA64_LTOFF(gen_code_ptr + %ld,"
2223                                   " %s + %ld, %d);\n",
2224                                   code_offset, relname, addend,
2225                                   (type == R_IA64_LTOFF22X));
2226                           break;
2227                       case R_IA64_LDXMOV:
2228                           fprintf(outfile,
2229                                   "    ia64_ldxmov(gen_code_ptr + %ld,"
2230                                   " %s + %ld);\n", code_offset, relname, addend);
2231                           break;
2232
2233                       case R_IA64_PCREL21B:
2234                           if (strstart(sym_name, "__op_gen_label", NULL)) {
2235                               fprintf(outfile,
2236                                       "    ia64_imm21b(gen_code_ptr + %ld,"
2237                                       " (long) (%s + %ld -\n\t\t"
2238                                       "((long) gen_code_ptr + %ld)) >> 4);\n",
2239                                       code_offset, relname, addend,
2240                                       code_offset & ~0xfUL);
2241                           } else {
2242                               fprintf(outfile,
2243                                       "    IA64_PLT(gen_code_ptr + %ld, "
2244                                       "%d);\t/* %s + %ld */\n",
2245                                       code_offset,
2246                                       get_plt_index(sym_name, addend),
2247                                       sym_name, addend);
2248                           }
2249                           break;
2250                       default:
2251                           error("unsupported ia64 relocation (0x%x)",
2252                                 type);
2253                     }
2254                 }
2255                 fprintf(outfile, "    ia64_nop_b(gen_code_ptr + %d);\n",
2256                         copy_size - 16 + 2);
2257             }
2258 #elif defined(HOST_SPARC)
2259             {
2260                 char relname[256];
2261                 int type;
2262                 int addend;
2263                 int reloc_offset;
2264                 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2265                     if (rel->r_offset >= start_offset &&
2266                         rel->r_offset < start_offset + copy_size) {
2267                         sym_name = strtab + symtab[ELF32_R_SYM(rel->r_info)].st_name;
2268                         get_reloc_expr(relname, sizeof(relname), sym_name);
2269                         type = ELF32_R_TYPE(rel->r_info);
2270                         addend = rel->r_addend;
2271                         reloc_offset = rel->r_offset - start_offset;
2272                         switch(type) {
2273                         case R_SPARC_32:
2274                             fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
2275                                     reloc_offset, relname, addend);
2276                             break;
2277                         case R_SPARC_HI22:
2278                             fprintf(outfile,
2279                                     "    *(uint32_t *)(gen_code_ptr + %d) = "
2280                                     "((*(uint32_t *)(gen_code_ptr + %d)) "
2281                                     " & ~0x3fffff) "
2282                                     " | (((%s + %d) >> 10) & 0x3fffff);\n",
2283                                     reloc_offset, reloc_offset, relname, addend);
2284                             break;
2285                         case R_SPARC_LO10:
2286                             fprintf(outfile,
2287                                     "    *(uint32_t *)(gen_code_ptr + %d) = "
2288                                     "((*(uint32_t *)(gen_code_ptr + %d)) "
2289                                     " & ~0x3ff) "
2290                                     " | ((%s + %d) & 0x3ff);\n",
2291                                     reloc_offset, reloc_offset, relname, addend);
2292                             break;
2293                         case R_SPARC_WDISP30:
2294                             fprintf(outfile,
2295                                     "    *(uint32_t *)(gen_code_ptr + %d) = "
2296                                     "((*(uint32_t *)(gen_code_ptr + %d)) "
2297                                     " & ~0x3fffffff) "
2298                                     " | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
2299                                     "    & 0x3fffffff);\n",
2300                                     reloc_offset, reloc_offset, relname, addend,
2301                                     reloc_offset);
2302                             break;
2303                         case R_SPARC_WDISP22:
2304                             fprintf(outfile,
2305                                     "    *(uint32_t *)(gen_code_ptr + %d) = "
2306                                     "((*(uint32_t *)(gen_code_ptr + %d)) "
2307                                     " & ~0x3fffff) "
2308                                     " | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
2309                                     "    & 0x3fffff);\n",
2310                                     rel->r_offset - start_offset,
2311                                     rel->r_offset - start_offset,
2312                                     relname, addend,
2313                                     rel->r_offset - start_offset);
2314                             break;
2315                         default:
2316                             error("unsupported sparc relocation (%d)", type);
2317                         }
2318                     }
2319                 }
2320             }
2321 #elif defined(HOST_SPARC64)
2322             {
2323                 char relname[256];
2324                 int type;
2325                 int addend;
2326                 int reloc_offset;
2327                 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2328                     if (rel->r_offset >= start_offset &&
2329                         rel->r_offset < start_offset + copy_size) {
2330                         sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name;
2331                         get_reloc_expr(relname, sizeof(relname), sym_name);
2332                         type = ELF32_R_TYPE(rel->r_info);
2333                         addend = rel->r_addend;
2334                         reloc_offset = rel->r_offset - start_offset;
2335                         switch(type) {
2336                         case R_SPARC_32:
2337                             fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
2338                                     reloc_offset, relname, addend);
2339                             break;
2340                         case R_SPARC_HI22:
2341                             fprintf(outfile,
2342                                     "    *(uint32_t *)(gen_code_ptr + %d) = "
2343                                     "((*(uint32_t *)(gen_code_ptr + %d)) "
2344                                     " & ~0x3fffff) "
2345                                     " | (((%s + %d) >> 10) & 0x3fffff);\n",
2346                                     reloc_offset, reloc_offset, relname, addend);
2347                             break;
2348                         case R_SPARC_LO10:
2349                             fprintf(outfile,
2350                                     "    *(uint32_t *)(gen_code_ptr + %d) = "
2351                                     "((*(uint32_t *)(gen_code_ptr + %d)) "
2352                                     " & ~0x3ff) "
2353                                     " | ((%s + %d) & 0x3ff);\n",
2354                                     reloc_offset, reloc_offset, relname, addend);
2355                             break;
2356                         case R_SPARC_OLO10:
2357                             addend += ELF64_R_TYPE_DATA (rel->r_info);
2358                             fprintf(outfile,
2359                                     "    *(uint32_t *)(gen_code_ptr + %d) = "
2360                                     "((*(uint32_t *)(gen_code_ptr + %d)) "
2361                                     " & ~0x3ff) "
2362                                     " | ((%s + %d) & 0x3ff);\n",
2363                                     reloc_offset, reloc_offset, relname, addend);
2364                             break;
2365                         case R_SPARC_WDISP30:
2366                             fprintf(outfile,
2367                                     "    *(uint32_t *)(gen_code_ptr + %d) = "
2368                                     "((*(uint32_t *)(gen_code_ptr + %d)) "
2369                                     " & ~0x3fffffff) "
2370                                     " | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
2371                                     "    & 0x3fffffff);\n",
2372                                     reloc_offset, reloc_offset, relname, addend,
2373                                     reloc_offset);
2374                             break;
2375                         case R_SPARC_WDISP22:
2376                             fprintf(outfile,
2377                                     "    *(uint32_t *)(gen_code_ptr + %d) = "
2378                                     "((*(uint32_t *)(gen_code_ptr + %d)) "
2379                                     " & ~0x3fffff) "
2380                                     " | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
2381                                     "    & 0x3fffff);\n",
2382                                     reloc_offset, reloc_offset, relname, addend,
2383                                     reloc_offset);
2384                             break;
2385                         case R_SPARC_HH22:
2386                             fprintf(outfile,
2387                                     "    *(uint32_t *)(gen_code_ptr + %d) = "
2388                                     "((*(uint32_t *)(gen_code_ptr + %d)) "
2389                                     " & ~0x00000000) "
2390                                     " | (((%s + %d) >> 42) & 0x00000000);\n",
2391                                     reloc_offset, reloc_offset, relname, addend);
2392                              break;
2393
2394                         case R_SPARC_LM22:
2395                             fprintf(outfile,
2396                                     "    *(uint32_t *)(gen_code_ptr + %d) = "
2397                                     "((*(uint32_t *)(gen_code_ptr + %d)) "
2398                                     " & ~0x00000000) "
2399                                     " | (((%s + %d) >> 10) & 0x00000000);\n",
2400                                     reloc_offset, reloc_offset, relname, addend);
2401                             break;
2402
2403                         case R_SPARC_HM10:
2404                             fprintf(outfile,
2405                                     "    *(uint32_t *)(gen_code_ptr + %d) = "
2406                                     "((*(uint32_t *)(gen_code_ptr + %d)) "
2407                                     " & ~0x00000000) "
2408                                     " | ((((%s + %d) >> 32 & 0x3ff)) & 0x00000000);\n",
2409                                     reloc_offset, reloc_offset, relname, addend);
2410                             break;
2411
2412                         default:
2413                             error("unsupported sparc64 relocation (%d) for symbol %s", type, relname);
2414                         }
2415                     }
2416                 }
2417             }
2418 #elif defined(HOST_M68K)
2419             {
2420                 char relname[256];
2421                 int type;
2422                 int addend;
2423                 int reloc_offset;
2424                 Elf32_Sym *sym;
2425                 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2426                 if (rel->r_offset >= start_offset &&
2427                     rel->r_offset < start_offset + copy_size) {
2428                     sym = &(symtab[ELFW(R_SYM)(rel->r_info)]);
2429                     sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
2430                     get_reloc_expr(relname, sizeof(relname), sym_name);
2431                     type = ELF32_R_TYPE(rel->r_info);
2432                     addend = get32((uint32_t *)(text + rel->r_offset)) + rel->r_addend;
2433                     reloc_offset = rel->r_offset - start_offset;
2434                     switch(type) {
2435                     case R_68K_32:
2436                         fprintf(outfile, "    /* R_68K_32 RELOC, offset %x */\n", rel->r_offset) ;
2437                         fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %#x;\n",
2438                                 reloc_offset, relname, addend );
2439                         break;
2440                     case R_68K_PC32:
2441                         fprintf(outfile, "    /* R_68K_PC32 RELOC, offset %x */\n", rel->r_offset);
2442                         fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %#x) + %#x;\n",
2443                                 reloc_offset, relname, reloc_offset, /*sym->st_value+*/ addend);
2444                         break;
2445                     default:
2446                         error("unsupported m68k relocation (%d)", type);
2447                     }
2448                 }
2449                 }
2450             }
2451 #elif defined(HOST_HPPA)
2452             {
2453                 char relname[256];
2454                 int type, is_label;
2455                 int addend;
2456                 int reloc_offset;
2457                 for (i = 0, rel = relocs; i < nb_relocs; i++, rel++) {
2458                 if (rel->r_offset >= start_offset &&
2459                     rel->r_offset < start_offset + copy_size) {
2460                     sym_name = get_rel_sym_name(rel);
2461                     sym_name = strtab + symtab[ELF32_R_SYM(rel->r_info)].st_name;
2462                     is_label = get_reloc_expr(relname, sizeof(relname), sym_name);
2463                     type = ELF32_R_TYPE(rel->r_info);
2464                     addend = rel->r_addend;
2465                     reloc_offset = rel->r_offset - start_offset;
2466
2467                     if (is_label) {
2468                         switch (type) {
2469                         case R_PARISC_PCREL17F:
2470                             fprintf(outfile,
2471 "    tcg_out_reloc(s, gen_code_ptr + %d, %d, %s, %d);\n",
2472                                     reloc_offset, type, relname, addend);
2473                             break;
2474                         default:
2475                             error("unsupported hppa label relocation (%d)", type);
2476                         }
2477                     } else {
2478                         switch (type) {
2479                         case R_PARISC_DIR21L:
2480                             fprintf(outfile,
2481 "    hppa_patch21l((uint32_t *)(gen_code_ptr + %d), %s, %d);\n",
2482                                     reloc_offset, relname, addend);
2483                             break;
2484                         case R_PARISC_DIR14R:
2485                             fprintf(outfile,
2486 "    hppa_patch14r((uint32_t *)(gen_code_ptr + %d), %s, %d);\n",
2487                                     reloc_offset, relname, addend);
2488                             break;
2489                         case R_PARISC_PCREL17F:
2490                             if (strstart(sym_name, "__op_gen_label", NULL)) {
2491                                 fprintf(outfile,
2492 "    hppa_patch17f((uint32_t *)(gen_code_ptr + %d), %s, %d);\n",
2493                                         reloc_offset, relname, addend);
2494                             } else {
2495                                 fprintf(outfile,
2496 "    HPPA_RECORD_BRANCH(hppa_stubs, (uint32_t *)(gen_code_ptr + %d), %s);\n",
2497                                         reloc_offset, relname);
2498                             }
2499                             break;
2500                         case R_PARISC_DPREL21L:
2501                             if (strstart(sym_name, "__op_param", &p))
2502                                 fprintf(outfile,
2503 "    hppa_load_imm21l((uint32_t *)(gen_code_ptr + %d), param%s, %d);\n",
2504                                         reloc_offset, p, addend);
2505                             else
2506                                 fprintf(outfile,
2507 "    hppa_patch21l_dprel((uint32_t *)(gen_code_ptr + %d), %s, %d);\n",
2508                                         reloc_offset, relname, addend);
2509                             break;
2510                         case R_PARISC_DPREL14R:
2511                             if (strstart(sym_name, "__op_param", &p))
2512                                 fprintf(outfile,
2513 "    hppa_load_imm14r((uint32_t *)(gen_code_ptr + %d), param%s, %d);\n",
2514                                         reloc_offset, p, addend);
2515                             else
2516                                 fprintf(outfile,
2517 "    hppa_patch14r_dprel((uint32_t *)(gen_code_ptr + %d), %s, %d);\n",
2518                                         reloc_offset, relname, addend);
2519                             break;
2520                         default:
2521                             error("unsupported hppa relocation (%d)", type);
2522                         }
2523                     }
2524                 }
2525                 }
2526             }
2527 #elif defined(HOST_MIPS) || defined(HOST_MIPS64)
2528             {
2529                 for (i = 0, rel = relocs; i < nb_relocs; i++, rel++) {
2530                     if (rel->r_offset >= start_offset && rel->r_offset < start_offset + copy_size) {
2531                         char relname[256];
2532                         int type;
2533                         int addend;
2534                         int reloc_offset;
2535
2536                         sym_name = strtab + symtab[ELF32_R_SYM(rel->r_info)].st_name;
2537                         /* the compiler leave some unnecessary references to the code */
2538                         if (sym_name[0] == '\0')
2539                             continue;
2540                         get_reloc_expr(relname, sizeof(relname), sym_name);
2541                         type = ELF32_R_TYPE(rel->r_info);
2542                         addend = get32((uint32_t *)(text + rel->r_offset));
2543                         reloc_offset = rel->r_offset - start_offset;
2544                         switch (type) {
2545                         case R_MIPS_26:
2546                             fprintf(outfile, "    /* R_MIPS_26 RELOC, offset 0x%x, name %s */\n",
2547                                     rel->r_offset, sym_name);
2548                             fprintf(outfile,
2549                                     "    *(uint32_t *)(gen_code_ptr + 0x%x) = "
2550                                     "(0x%x & ~0x3fffff) "
2551                                     "| ((0x%x + ((%s - (*(uint32_t *)(gen_code_ptr + 0x%x))) >> 2)) "
2552                                     "   & 0x3fffff);\n",
2553                                     reloc_offset, addend, addend, relname, reloc_offset);
2554                             break;
2555                         case R_MIPS_HI16:
2556                             fprintf(outfile, "    /* R_MIPS_HI16 RELOC, offset 0x%x, name %s */\n",
2557                                     rel->r_offset, sym_name);
2558                             fprintf(outfile,
2559                                     "    *(uint32_t *)(gen_code_ptr + 0x%x) = "
2560                                     "((*(uint32_t *)(gen_code_ptr + 0x%x)) "
2561                                     " & ~0xffff) "
2562                                     " | (((%s - 0x8000) >> 16) & 0xffff);\n",
2563                                     reloc_offset, reloc_offset, relname);
2564                             break;
2565                         case R_MIPS_LO16:
2566                             fprintf(outfile, "    /* R_MIPS_LO16 RELOC, offset 0x%x, name %s */\n",
2567                                     rel->r_offset, sym_name);
2568                             fprintf(outfile,
2569                                     "    *(uint32_t *)(gen_code_ptr + 0x%x) = "
2570                                     "((*(uint32_t *)(gen_code_ptr + 0x%x)) "
2571                                     " & ~0xffff) "
2572                                     " | (%s & 0xffff);\n",
2573                                     reloc_offset, reloc_offset, relname);
2574                             break;
2575                         case R_MIPS_PC16:
2576                             fprintf(outfile, "    /* R_MIPS_PC16 RELOC, offset 0x%x, name %s */\n",
2577                                     rel->r_offset, sym_name);
2578                             fprintf(outfile,
2579                                     "    *(uint32_t *)(gen_code_ptr + 0x%x) = "
2580                                     "(0x%x & ~0xffff) "
2581                                     "| ((0x%x + ((%s - (*(uint32_t *)(gen_code_ptr + 0x%x))) >> 2)) "
2582                                     "   & 0xffff);\n",
2583                                     reloc_offset, addend, addend, relname, reloc_offset);
2584                             break;
2585                         case R_MIPS_GOT16:
2586                         case R_MIPS_CALL16:
2587                             fprintf(outfile, "    /* R_MIPS_GOT16 RELOC, offset 0x%x, name %s */\n",
2588                                     rel->r_offset, sym_name);
2589                             fprintf(outfile,
2590                                     "    *(uint32_t *)(gen_code_ptr + 0x%x) = "
2591                                     "((*(uint32_t *)(gen_code_ptr + 0x%x)) "
2592                                     " & ~0xffff) "
2593                                     " | (((%s - 0x8000) >> 16) & 0xffff);\n",
2594                                     reloc_offset, reloc_offset, relname);
2595                             break;
2596                         default:
2597                             error("unsupported MIPS relocation (%d)", type);
2598                         }
2599                     }
2600                 }
2601             }
2602 #elif defined(HOST_ARM)
2603     error("dyngen targets not supported on ARM");
2604 #elif defined(HOST_PPC64)
2605     error("dyngen targets not supported on PPC64");
2606 #else
2607 #error unsupported CPU
2608 #endif
2609         fprintf(outfile, "    gen_code_ptr += %d;\n", copy_size);
2610         fprintf(outfile, "}\n");
2611         fprintf(outfile, "break;\n\n");
2612     } else {
2613         fprintf(outfile, "static inline void gen_%s(", name);
2614         if (nb_args == 0) {
2615             fprintf(outfile, "void");
2616         } else {
2617             for(i = 0; i < nb_args; i++) {
2618                 if (i != 0)
2619                     fprintf(outfile, ", ");
2620                 fprintf(outfile, "long param%d", i + 1);
2621             }
2622         }
2623         fprintf(outfile, ")\n");
2624         fprintf(outfile, "{\n");
2625         for(i = 0; i < nb_args; i++) {
2626             fprintf(outfile, "    *gen_opparam_ptr++ = param%d;\n", i + 1);
2627         }
2628         fprintf(outfile, "    *gen_opc_ptr++ = INDEX_%s;\n", name);
2629         fprintf(outfile, "}\n\n");
2630     }
2631 }
2632
2633 static int gen_file(FILE *outfile, int out_type)
2634 {
2635     int i;
2636     EXE_SYM *sym;
2637
2638     if (out_type == OUT_INDEX_OP) {
2639         for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
2640             const char *name;
2641             name = get_sym_name(sym);
2642             if (strstart(name, OP_PREFIX, NULL)) {
2643                 gen_code(name, sym->st_value, sym->st_size, outfile, 2);
2644             }
2645         }
2646     } else if (out_type == OUT_GEN_OP) {
2647         /* generate gen_xxx functions */
2648         for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
2649             const char *name;
2650             name = get_sym_name(sym);
2651             if (strstart(name, OP_PREFIX, NULL)) {
2652 #if defined(CONFIG_FORMAT_ELF) || defined(CONFIG_FORMAT_COFF)
2653                 if (sym->st_shndx != text_shndx)
2654                     error("invalid section for opcode (0x%x)", sym->st_shndx);
2655 #endif
2656                 gen_code(name, sym->st_value, sym->st_size, outfile, 0);
2657             }
2658         }
2659
2660     } else {
2661         /* generate big code generation switch */
2662
2663 #ifdef HOST_ARM
2664     error("dyngen targets not supported on ARM");
2665 #endif
2666 #ifdef HOST_IA64
2667 #error broken
2668     {
2669         long addend, not_first = 0;
2670         unsigned long sym_idx;
2671         int index, max_index;
2672         const char *sym_name;
2673         EXE_RELOC *rel;
2674
2675         max_index = -1;
2676         for (i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2677             sym_idx = ELF64_R_SYM(rel->r_info);
2678             sym_name = (strtab + symtab[sym_idx].st_name);
2679             if (strstart(sym_name, "__op_gen_label", NULL))
2680                 continue;
2681             if (ELF64_R_TYPE(rel->r_info) != R_IA64_PCREL21B)
2682                 continue;
2683
2684             addend = rel->r_addend;
2685             index = get_plt_index(sym_name, addend);
2686             if (index <= max_index)
2687                 continue;
2688             max_index = index;
2689             fprintf(outfile, "    extern void %s(void);\n", sym_name);
2690         }
2691
2692         fprintf(outfile,
2693                 "    struct ia64_fixup *plt_fixes = NULL, "
2694                 "*ltoff_fixes = NULL;\n"
2695                 "    static long plt_target[] = {\n\t");
2696
2697         max_index = -1;
2698         for (i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2699             sym_idx = ELF64_R_SYM(rel->r_info);
2700             sym_name = (strtab + symtab[sym_idx].st_name);
2701             if (strstart(sym_name, "__op_gen_label", NULL))
2702                 continue;
2703             if (ELF64_R_TYPE(rel->r_info) != R_IA64_PCREL21B)
2704                 continue;
2705
2706             addend = rel->r_addend;
2707             index = get_plt_index(sym_name, addend);
2708             if (index <= max_index)
2709                 continue;
2710             max_index = index;
2711
2712             if (not_first)
2713                 fprintf(outfile, ",\n\t");
2714             not_first = 1;
2715             if (addend)
2716                 fprintf(outfile, "(long) &%s + %ld", sym_name, addend);
2717             else
2718                 fprintf(outfile, "(long) &%s", sym_name);
2719         }
2720         fprintf(outfile, "\n    };\n"
2721             "    unsigned int plt_offset[%u] = { 0 };\n", max_index + 1);
2722     }
2723 #endif
2724
2725         for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
2726             const char *name;
2727             name = get_sym_name(sym);
2728             if (strstart(name, OP_PREFIX, NULL)) {
2729 #if 0
2730                 printf("%4d: %s pos=0x%08x len=%d\n",
2731                        i, name, sym->st_value, sym->st_size);
2732 #endif
2733 #if defined(CONFIG_FORMAT_ELF) || defined(CONFIG_FORMAT_COFF)
2734                 if (sym->st_shndx != text_shndx)
2735                     error("invalid section for opcode (0x%x)", sym->st_shndx);
2736 #endif
2737                 gen_code(name, sym->st_value, sym->st_size, outfile, 1);
2738             }
2739         }
2740     }
2741
2742     return 0;
2743 }
2744
2745 static void usage(void)
2746 {
2747     printf("dyngen (c) 2003 Fabrice Bellard\n"
2748            "usage: dyngen [-o outfile] [-c] objfile\n"
2749            "Generate a dynamic code generator from an object file\n"
2750            "-c     output enum of operations\n"
2751            "-g     output gen_op_xx() functions\n"
2752            );
2753     exit(1);
2754 }
2755
2756 int main(int argc, char **argv)
2757 {
2758     int c, out_type;
2759     const char *filename, *outfilename;
2760     FILE *outfile;
2761
2762     outfilename = "out.c";
2763     out_type = OUT_CODE;
2764     for(;;) {
2765         c = getopt(argc, argv, "ho:cg");
2766         if (c == -1)
2767             break;
2768         switch(c) {
2769         case 'h':
2770             usage();
2771             break;
2772         case 'o':
2773             outfilename = optarg;
2774             break;
2775         case 'c':
2776             out_type = OUT_INDEX_OP;
2777             break;
2778         case 'g':
2779             out_type = OUT_GEN_OP;
2780             break;
2781         }
2782     }
2783     if (optind >= argc)
2784         usage();
2785     filename = argv[optind];
2786     outfile = fopen(outfilename, "w");
2787     if (!outfile)
2788         error("could not open '%s'", outfilename);
2789
2790     load_object(filename);
2791     gen_file(outfile, out_type);
2792     fclose(outfile);
2793     return 0;
2794 }