dyngen.c

   1 /*
   2  *  Generic Dynamic compiler generator
   3  *
   4  *  Copyright (c) 2003 Fabrice Bellard
   5  *
   6  *  The COFF object format support was extracted from Kazu's QEMU port
   7  *  to Win32.
   8  *
   9  *  Mach-O Support by Matt Reda and Pierre d'Herbemont
  10  *
  11  *  This program is free software; you can redistribute it and/or modify
  12  *  it under the terms of the GNU General Public License as published by
  13  *  the Free Software Foundation; either version 2 of the License, or
  14  *  (at your option) any later version.
  15  *
  16  *  This program is distributed in the hope that it will be useful,
  17  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  *  GNU General Public License for more details.
  20  *
  21  *  You should have received a copy of the GNU General Public License
  22  *  along with this program; if not, write to the Free Software
  23  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24  */
  25 #include <stdlib.h>
  26 #include <stdio.h>
  27 #include <string.h>
  28 #include <stdarg.h>
  29 #include <inttypes.h>
  30 #include <unistd.h>
  31 #include <fcntl.h>
  32
  33 #include "config-host.h"
  34
  35 /* NOTE: we test CONFIG_WIN32 instead of _WIN32 to enabled cross
  36    compilation */
  37 #if defined(CONFIG_WIN32)
  38 #define CONFIG_FORMAT_COFF
  39 #elif defined(CONFIG_DARWIN)
  40 #define CONFIG_FORMAT_MACH
  41 #else
  42 #define CONFIG_FORMAT_ELF
  43 #endif
  44
  45 #ifdef CONFIG_FORMAT_ELF
  46
  47 /* elf format definitions. We use these macros to test the CPU to
  48    allow cross compilation (this tool must be ran on the build
  49    platform) */
  50 #if defined(HOST_I386)
  51
  52 #define ELF_CLASS       ELFCLASS32
  53 #define ELF_ARCH        EM_386
  54 #define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) )
  55 #undef ELF_USES_RELOCA
  56
  57 #elif defined(HOST_X86_64)
  58
  59 #define ELF_CLASS       ELFCLASS64
  60 #define ELF_ARCH        EM_X86_64
  61 #define elf_check_arch(x) ((x) == EM_X86_64)
  62 #define ELF_USES_RELOCA
  63
  64 #elif defined(HOST_PPC)
  65
  66 #define ELF_CLASS       ELFCLASS32
  67 #define ELF_ARCH        EM_PPC
  68 #define elf_check_arch(x) ((x) == EM_PPC)
  69 #define ELF_USES_RELOCA
  70
  71 #elif defined(HOST_S390)
  72
  73 #define ELF_CLASS       ELFCLASS32
  74 #define ELF_ARCH        EM_S390
  75 #define elf_check_arch(x) ((x) == EM_S390)
  76 #define ELF_USES_RELOCA
  77
  78 #elif defined(HOST_ALPHA)
  79
  80 #define ELF_CLASS       ELFCLASS64
  81 #define ELF_ARCH        EM_ALPHA
  82 #define elf_check_arch(x) ((x) == EM_ALPHA)
  83 #define ELF_USES_RELOCA
  84
  85 #elif defined(HOST_IA64)
  86
  87 #define ELF_CLASS       ELFCLASS64
  88 #define ELF_ARCH        EM_IA_64
  89 #define elf_check_arch(x) ((x) == EM_IA_64)
  90 #define ELF_USES_RELOCA
  91
  92 #elif defined(HOST_SPARC)
  93
  94 #define ELF_CLASS       ELFCLASS32
  95 #define ELF_ARCH        EM_SPARC
  96 #define elf_check_arch(x) ((x) == EM_SPARC || (x) == EM_SPARC32PLUS)
  97 #define ELF_USES_RELOCA
  98
  99 #elif defined(HOST_SPARC64)
 100
 101 #define ELF_CLASS       ELFCLASS64
 102 #define ELF_ARCH        EM_SPARCV9
 103 #define elf_check_arch(x) ((x) == EM_SPARCV9)
 104 #define ELF_USES_RELOCA
 105
 106 #elif defined(HOST_ARM)
 107
 108 #define ELF_CLASS       ELFCLASS32
 109 #define ELF_ARCH        EM_ARM
 110 #define elf_check_arch(x) ((x) == EM_ARM)
 111 #define ELF_USES_RELOC
 112
 113 #elif defined(HOST_M68K)
 114
 115 #define ELF_CLASS       ELFCLASS32
 116 #define ELF_ARCH        EM_68K
 117 #define elf_check_arch(x) ((x) == EM_68K)
 118 #define ELF_USES_RELOCA
 119
 120 #elif defined(HOST_MIPS)
 121
 122 #define ELF_CLASS       ELFCLASS32
 123 #define ELF_ARCH        EM_MIPS
 124 #define elf_check_arch(x) ((x) == EM_MIPS)
 125 #define ELF_USES_RELOC
 126
 127 #elif defined(HOST_MIPS64)
 128
 129 /* Assume n32 ABI here, which is ELF32. */
 130 #define ELF_CLASS       ELFCLASS32
 131 #define ELF_ARCH        EM_MIPS
 132 #define elf_check_arch(x) ((x) == EM_MIPS)
 133 #define ELF_USES_RELOCA
 134
 135 #else
 136 #error unsupported CPU - please update the code
 137 #endif
 138
 139 #include "elf.h"
 140
 141 #if ELF_CLASS == ELFCLASS32
 142 typedef int32_t host_long;
 143 typedef uint32_t host_ulong;
 144 #define swabls(x) swab32s(x)
 145 #define swablss(x) swab32ss(x)
 146 #else
 147 typedef int64_t host_long;
 148 typedef uint64_t host_ulong;
 149 #define swabls(x) swab64s(x)
 150 #define swablss(x) swab64ss(x)
 151 #endif
 152
 153 #ifdef ELF_USES_RELOCA
 154 #define SHT_RELOC SHT_RELA
 155 #else
 156 #define SHT_RELOC SHT_REL
 157 #endif
 158
 159 #define EXE_RELOC ELF_RELOC
 160 #define EXE_SYM ElfW(Sym)
 161
 162 #endif /* CONFIG_FORMAT_ELF */
 163
 164 #ifdef CONFIG_FORMAT_COFF
 165
 166 typedef int32_t host_long;
 167 typedef uint32_t host_ulong;
 168
 169 #include "a.out.h"
 170
 171 #define FILENAMELEN 256
 172
 173 typedef struct coff_sym {
 174     struct external_syment *st_syment;
 175     char st_name[FILENAMELEN];
 176     uint32_t st_value;
 177     int  st_size;
 178     uint8_t st_type;
 179     uint8_t st_shndx;
 180 } coff_Sym;
 181
 182 typedef struct coff_rel {
 183     struct external_reloc *r_reloc;
 184     int  r_offset;
 185     uint8_t r_type;
 186 } coff_Rel;
 187
 188 #define EXE_RELOC struct coff_rel
 189 #define EXE_SYM struct coff_sym
 190
 191 #endif /* CONFIG_FORMAT_COFF */
 192
 193 #ifdef CONFIG_FORMAT_MACH
 194
 195 #include <mach-o/loader.h>
 196 #include <mach-o/nlist.h>
 197 #include <mach-o/reloc.h>
 198 #include <mach-o/ppc/reloc.h>
 199
 200 # define check_mach_header(x) (x.magic == MH_MAGIC)
 201 typedef int32_t host_long;
 202 typedef uint32_t host_ulong;
 203
 204 struct nlist_extended
 205 {
 206    union {
 207    char *n_name;
 208    long  n_strx;
 209    } n_un;
 210    unsigned char n_type;
 211    unsigned char n_sect;
 212    short st_desc;
 213    unsigned long st_value;
 214    unsigned long st_size;
 215 };
 216
 217 #define EXE_RELOC struct relocation_info
 218 #define EXE_SYM struct nlist_extended
 219
 220 #endif /* CONFIG_FORMAT_MACH */
 221
 222 #include "bswap.h"
 223
 224 enum {
 225     OUT_GEN_OP,
 226     OUT_CODE,
 227     OUT_INDEX_OP,
 228 };
 229
 230 /* all dynamically generated functions begin with this code */
 231 #define OP_PREFIX "op_"
 232
 233 int do_swap;
 234
 235 static void __attribute__((noreturn)) __attribute__((format (printf, 1, 2))) error(const char *fmt, ...)
 236 {
 237     va_list ap;
 238     va_start(ap, fmt);
 239     fprintf(stderr, "dyngen: ");
 240     vfprintf(stderr, fmt, ap);
 241     fprintf(stderr, "\n");
 242     va_end(ap);
 243     exit(1);
 244 }
 245
 246 static void *load_data(int fd, long offset, unsigned int size)
 247 {
 248     char *data;
 249
 250     data = malloc(size);
 251     if (!data)
 252         return NULL;
 253     lseek(fd, offset, SEEK_SET);
 254     if (read(fd, data, size) != size) {
 255         free(data);
 256         return NULL;
 257     }
 258     return data;
 259 }
 260
 261 int strstart(const char *str, const char *val, const char **ptr)
 262 {
 263     const char *p, *q;
 264     p = str;
 265     q = val;
 266     while (*q != '\0') {
 267         if (*p != *q)
 268             return 0;
 269         p++;
 270         q++;
 271     }
 272     if (ptr)
 273         *ptr = p;
 274     return 1;
 275 }
 276
 277 void pstrcpy(char *buf, int buf_size, const char *str)
 278 {
 279     int c;
 280     char *q = buf;
 281
 282     if (buf_size <= 0)
 283         return;
 284
 285     for(;;) {
 286         c = *str++;
 287         if (c == 0 || q >= buf + buf_size - 1)
 288             break;
 289         *q++ = c;
 290     }
 291     *q = '\0';
 292 }
 293
 294 void swab16s(uint16_t *p)
 295 {
 296     *p = bswap16(*p);
 297 }
 298
 299 void swab32s(uint32_t *p)
 300 {
 301     *p = bswap32(*p);
 302 }
 303
 304 void swab32ss(int32_t *p)
 305 {
 306     *p = bswap32(*p);
 307 }
 308
 309 void swab64s(uint64_t *p)
 310 {
 311     *p = bswap64(*p);
 312 }
 313
 314 void swab64ss(int64_t *p)
 315 {
 316     *p = bswap64(*p);
 317 }
 318
 319 uint16_t get16(uint16_t *p)
 320 {
 321     uint16_t val;
 322     val = *p;
 323     if (do_swap)
 324         val = bswap16(val);
 325     return val;
 326 }
 327
 328 uint32_t get32(uint32_t *p)
 329 {
 330     uint32_t val;
 331     val = *p;
 332     if (do_swap)
 333         val = bswap32(val);
 334     return val;
 335 }
 336
 337 void put16(uint16_t *p, uint16_t val)
 338 {
 339     if (do_swap)
 340         val = bswap16(val);
 341     *p = val;
 342 }
 343
 344 void put32(uint32_t *p, uint32_t val)
 345 {
 346     if (do_swap)
 347         val = bswap32(val);
 348     *p = val;
 349 }
 350
 351 /* executable information */
 352 EXE_SYM *symtab;
 353 int nb_syms;
 354 int text_shndx;
 355 uint8_t *text;
 356 EXE_RELOC *relocs;
 357 int nb_relocs;
 358
 359 #ifdef CONFIG_FORMAT_ELF
 360
 361 /* ELF file info */
 362 struct elf_shdr *shdr;
 363 uint8_t **sdata;
 364 struct elfhdr ehdr;
 365 char *strtab;
 366
 367 int elf_must_swap(struct elfhdr *h)
 368 {
 369   union {
 370       uint32_t i;
 371       uint8_t b[4];
 372   } swaptest;
 373
 374   swaptest.i = 1;
 375   return (h->e_ident[EI_DATA] == ELFDATA2MSB) !=
 376       (swaptest.b[0] == 0);
 377 }
 378
 379 void elf_swap_ehdr(struct elfhdr *h)
 380 {
 381     swab16s(&h->e_type);                        /* Object file type */
 382     swab16s(&h->        e_machine);             /* Architecture */
 383     swab32s(&h->        e_version);             /* Object file version */
 384     swabls(&h-> e_entry);               /* Entry point virtual address */
 385     swabls(&h-> e_phoff);               /* Program header table file offset */
 386     swabls(&h-> e_shoff);               /* Section header table file offset */
 387     swab32s(&h->        e_flags);               /* Processor-specific flags */
 388     swab16s(&h->        e_ehsize);              /* ELF header size in bytes */
 389     swab16s(&h->        e_phentsize);           /* Program header table entry size */
 390     swab16s(&h->        e_phnum);               /* Program header table entry count */
 391     swab16s(&h->        e_shentsize);           /* Section header table entry size */
 392     swab16s(&h->        e_shnum);               /* Section header table entry count */
 393     swab16s(&h->        e_shstrndx);            /* Section header string table index */
 394 }
 395
 396 void elf_swap_shdr(struct elf_shdr *h)
 397 {
 398   swab32s(&h->  sh_name);               /* Section name (string tbl index) */
 399   swab32s(&h->  sh_type);               /* Section type */
 400   swabls(&h->   sh_flags);              /* Section flags */
 401   swabls(&h->   sh_addr);               /* Section virtual addr at execution */
 402   swabls(&h->   sh_offset);             /* Section file offset */
 403   swabls(&h->   sh_size);               /* Section size in bytes */
 404   swab32s(&h->  sh_link);               /* Link to another section */
 405   swab32s(&h->  sh_info);               /* Additional section information */
 406   swabls(&h->   sh_addralign);          /* Section alignment */
 407   swabls(&h->   sh_entsize);            /* Entry size if section holds table */
 408 }
 409
 410 void elf_swap_phdr(struct elf_phdr *h)
 411 {
 412     swab32s(&h->p_type);                        /* Segment type */
 413     swabls(&h->p_offset);               /* Segment file offset */
 414     swabls(&h->p_vaddr);                /* Segment virtual address */
 415     swabls(&h->p_paddr);                /* Segment physical address */
 416     swabls(&h->p_filesz);               /* Segment size in file */
 417     swabls(&h->p_memsz);                /* Segment size in memory */
 418     swab32s(&h->p_flags);               /* Segment flags */
 419     swabls(&h->p_align);                /* Segment alignment */
 420 }
 421
 422 void elf_swap_rel(ELF_RELOC *rel)
 423 {
 424     swabls(&rel->r_offset);
 425     swabls(&rel->r_info);
 426 #ifdef ELF_USES_RELOCA
 427     swablss(&rel->r_addend);
 428 #endif
 429 }
 430
 431 struct elf_shdr *find_elf_section(struct elf_shdr *shdr, int shnum, const char *shstr,
 432                                   const char *name)
 433 {
 434     int i;
 435     const char *shname;
 436     struct elf_shdr *sec;
 437
 438     for(i = 0; i < shnum; i++) {
 439         sec = &shdr[i];
 440         if (!sec->sh_name)
 441             continue;
 442         shname = shstr + sec->sh_name;
 443         if (!strcmp(shname, name))
 444             return sec;
 445     }
 446     return NULL;
 447 }
 448
 449 int find_reloc(int sh_index)
 450 {
 451     struct elf_shdr *sec;
 452     int i;
 453
 454     for(i = 0; i < ehdr.e_shnum; i++) {
 455         sec = &shdr[i];
 456         if (sec->sh_type == SHT_RELOC && sec->sh_info == sh_index)
 457             return i;
 458     }
 459     return 0;
 460 }
 461
 462 static host_ulong get_rel_offset(EXE_RELOC *rel)
 463 {
 464     return rel->r_offset;
 465 }
 466
 467 static char *get_rel_sym_name(EXE_RELOC *rel)
 468 {
 469     return strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
 470 }
 471
 472 static char *get_sym_name(EXE_SYM *sym)
 473 {
 474     return strtab + sym->st_name;
 475 }
 476
 477 /* load an elf object file */
 478 int load_object(const char *filename)
 479 {
 480     int fd;
 481     struct elf_shdr *sec, *symtab_sec, *strtab_sec, *text_sec;
 482     int i, j;
 483     ElfW(Sym) *sym;
 484     char *shstr;
 485     ELF_RELOC *rel;
 486
 487     fd = open(filename, O_RDONLY);
 488     if (fd < 0)
 489         error("can't open file '%s'", filename);
 490
 491     /* Read ELF header.  */
 492     if (read(fd, &ehdr, sizeof (ehdr)) != sizeof (ehdr))
 493         error("unable to read file header");
 494
 495     /* Check ELF identification.  */
 496     if (ehdr.e_ident[EI_MAG0] != ELFMAG0
 497      || ehdr.e_ident[EI_MAG1] != ELFMAG1
 498      || ehdr.e_ident[EI_MAG2] != ELFMAG2
 499      || ehdr.e_ident[EI_MAG3] != ELFMAG3
 500      || ehdr.e_ident[EI_VERSION] != EV_CURRENT) {
 501         error("bad ELF header");
 502     }
 503
 504     do_swap = elf_must_swap(&ehdr);
 505     if (do_swap)
 506         elf_swap_ehdr(&ehdr);
 507     if (ehdr.e_ident[EI_CLASS] != ELF_CLASS)
 508         error("Unsupported ELF class");
 509     if (ehdr.e_type != ET_REL)
 510         error("ELF object file expected");
 511     if (ehdr.e_version != EV_CURRENT)
 512         error("Invalid ELF version");
 513     if (!elf_check_arch(ehdr.e_machine))
 514         error("Unsupported CPU (e_machine=%d)", ehdr.e_machine);
 515
 516     /* read section headers */
 517     shdr = load_data(fd, ehdr.e_shoff, ehdr.e_shnum * sizeof(struct elf_shdr));
 518     if (do_swap) {
 519         for(i = 0; i < ehdr.e_shnum; i++) {
 520             elf_swap_shdr(&shdr[i]);
 521         }
 522     }
 523
 524     /* read all section data */
 525     sdata = malloc(sizeof(void *) * ehdr.e_shnum);
 526     memset(sdata, 0, sizeof(void *) * ehdr.e_shnum);
 527
 528     for(i = 0;i < ehdr.e_shnum; i++) {
 529         sec = &shdr[i];
 530         if (sec->sh_type != SHT_NOBITS)
 531             sdata[i] = load_data(fd, sec->sh_offset, sec->sh_size);
 532     }
 533
 534     sec = &shdr[ehdr.e_shstrndx];
 535     shstr = (char *)sdata[ehdr.e_shstrndx];
 536
 537     /* swap relocations */
 538     for(i = 0; i < ehdr.e_shnum; i++) {
 539         sec = &shdr[i];
 540         if (sec->sh_type == SHT_RELOC) {
 541             nb_relocs = sec->sh_size / sec->sh_entsize;
 542             if (do_swap) {
 543                 for(j = 0, rel = (ELF_RELOC *)sdata[i]; j < nb_relocs; j++, rel++)
 544                     elf_swap_rel(rel);
 545             }
 546         }
 547     }
 548     /* text section */
 549
 550     text_sec = find_elf_section(shdr, ehdr.e_shnum, shstr, ".text");
 551     if (!text_sec)
 552         error("could not find .text section");
 553     text_shndx = text_sec - shdr;
 554     text = sdata[text_shndx];
 555
 556     /* find text relocations, if any */
 557     relocs = NULL;
 558     nb_relocs = 0;
 559     i = find_reloc(text_shndx);
 560     if (i != 0) {
 561         relocs = (ELF_RELOC *)sdata[i];
 562         nb_relocs = shdr[i].sh_size / shdr[i].sh_entsize;
 563     }
 564
 565     symtab_sec = find_elf_section(shdr, ehdr.e_shnum, shstr, ".symtab");
 566     if (!symtab_sec)
 567         error("could not find .symtab section");
 568     strtab_sec = &shdr[symtab_sec->sh_link];
 569
 570     symtab = (ElfW(Sym) *)sdata[symtab_sec - shdr];
 571     strtab = (char *)sdata[symtab_sec->sh_link];
 572
 573     nb_syms = symtab_sec->sh_size / sizeof(ElfW(Sym));
 574     if (do_swap) {
 575         for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
 576             swab32s(&sym->st_name);
 577             swabls(&sym->st_value);
 578             swabls(&sym->st_size);
 579             swab16s(&sym->st_shndx);
 580         }
 581     }
 582     close(fd);
 583     return 0;
 584 }
 585
 586 #endif /* CONFIG_FORMAT_ELF */
 587
 588 #ifdef CONFIG_FORMAT_COFF
 589
 590 /* COFF file info */
 591 struct external_scnhdr *shdr;
 592 uint8_t **sdata;
 593 struct external_filehdr fhdr;
 594 struct external_syment *coff_symtab;
 595 char *strtab;
 596 int coff_text_shndx, coff_data_shndx;
 597
 598 int data_shndx;
 599
 600 #define STRTAB_SIZE 4
 601
 602 #define DIR32   0x06
 603 #define DISP32  0x14
 604
 605 #define T_FUNCTION  0x20
 606 #define C_EXTERNAL  2
 607
 608 void sym_ent_name(struct external_syment *ext_sym, EXE_SYM *sym)
 609 {
 610     char *q;
 611     int c, i, len;
 612
 613     if (ext_sym->e.e.e_zeroes != 0) {
 614         q = sym->st_name;
 615         for(i = 0; i < 8; i++) {
 616             c = ext_sym->e.e_name[i];
 617             if (c == '\0')
 618                 break;
 619             *q++ = c;
 620         }
 621         *q = '\0';
 622     } else {
 623         pstrcpy(sym->st_name, sizeof(sym->st_name), strtab + ext_sym->e.e.e_offset);
 624     }
 625
 626     /* now convert the name to a C name (suppress the leading '_') */
 627     if (sym->st_name[0] == '_') {
 628         len = strlen(sym->st_name);
 629         memmove(sym->st_name, sym->st_name + 1, len - 1);
 630         sym->st_name[len - 1] = '\0';
 631     }
 632 }
 633
 634 char *name_for_dotdata(struct coff_rel *rel)
 635 {
 636         int i;
 637         struct coff_sym *sym;
 638         uint32_t text_data;
 639
 640         text_data = *(uint32_t *)(text + rel->r_offset);
 641
 642         for (i = 0, sym = symtab; i < nb_syms; i++, sym++) {
 643                 if (sym->st_syment->e_scnum == data_shndx &&
 644                     text_data >= sym->st_value &&
 645                     text_data < sym->st_value + sym->st_size) {
 646
 647                     return sym->st_name;
 648
 649                 }
 650         }
 651         return NULL;
 652 }
 653
 654 static char *get_sym_name(EXE_SYM *sym)
 655 {
 656     return sym->st_name;
 657 }
 658
 659 static char *get_rel_sym_name(EXE_RELOC *rel)
 660 {
 661     char *name;
 662     name = get_sym_name(symtab + *(uint32_t *)(rel->r_reloc->r_symndx));
 663     if (!strcmp(name, ".data"))
 664         name = name_for_dotdata(rel);
 665     if (name[0] == '.')
 666         return NULL;
 667     return name;
 668 }
 669
 670 static host_ulong get_rel_offset(EXE_RELOC *rel)
 671 {
 672     return rel->r_offset;
 673 }
 674
 675 struct external_scnhdr *find_coff_section(struct external_scnhdr *shdr, int shnum, const char *name)
 676 {
 677     int i;
 678     const char *shname;
 679     struct external_scnhdr *sec;
 680
 681     for(i = 0; i < shnum; i++) {
 682         sec = &shdr[i];
 683         if (!sec->s_name)
 684             continue;
 685         shname = sec->s_name;
 686         if (!strcmp(shname, name))
 687             return sec;
 688     }
 689     return NULL;
 690 }
 691
 692 /* load a coff object file */
 693 int load_object(const char *filename)
 694 {
 695     int fd;
 696     struct external_scnhdr *sec, *text_sec, *data_sec;
 697     int i;
 698     struct external_syment *ext_sym;
 699     struct external_reloc *coff_relocs;
 700     struct external_reloc *ext_rel;
 701     uint32_t *n_strtab;
 702     EXE_SYM *sym;
 703     EXE_RELOC *rel;
 704     const char *p;
 705     int aux_size, j;
 706
 707     fd = open(filename, O_RDONLY
 708 #ifdef _WIN32
 709               | O_BINARY
 710 #endif
 711               );
 712     if (fd < 0)
 713         error("can't open file '%s'", filename);
 714
 715     /* Read COFF header.  */
 716     if (read(fd, &fhdr, sizeof (fhdr)) != sizeof (fhdr))
 717         error("unable to read file header");
 718
 719     /* Check COFF identification.  */
 720     if (fhdr.f_magic != I386MAGIC) {
 721         error("bad COFF header");
 722     }
 723     do_swap = 0;
 724
 725     /* read section headers */
 726     shdr = load_data(fd, sizeof(struct external_filehdr) + fhdr.f_opthdr, fhdr.f_nscns * sizeof(struct external_scnhdr));
 727
 728     /* read all section data */
 729     sdata = malloc(sizeof(void *) * fhdr.f_nscns);
 730     memset(sdata, 0, sizeof(void *) * fhdr.f_nscns);
 731
 732     for(i = 0;i < fhdr.f_nscns; i++) {
 733         sec = &shdr[i];
 734         if (!strstart(sec->s_name,  ".bss", &p))
 735             sdata[i] = load_data(fd, sec->s_scnptr, sec->s_size);
 736     }
 737
 738
 739     /* text section */
 740     text_sec = find_coff_section(shdr, fhdr.f_nscns, ".text");
 741     if (!text_sec)
 742         error("could not find .text section");
 743     coff_text_shndx = text_sec - shdr;
 744     text = sdata[coff_text_shndx];
 745
 746     /* data section */
 747     data_sec = find_coff_section(shdr, fhdr.f_nscns, ".data");
 748     if (!data_sec)
 749         error("could not find .data section");
 750     coff_data_shndx = data_sec - shdr;
 751
 752     coff_symtab = load_data(fd, fhdr.f_symptr, fhdr.f_nsyms*SYMESZ);
 753     for (i = 0, ext_sym = coff_symtab; i < nb_syms; i++, ext_sym++) {
 754         for(i=0;i<8;i++)
 755             printf(" %02x", ((uint8_t *)ext_sym->e.e_name)[i]);
 756         printf("\n");
 757     }
 758
 759
 760     n_strtab = load_data(fd, (fhdr.f_symptr + fhdr.f_nsyms*SYMESZ), STRTAB_SIZE);
 761     strtab = load_data(fd, (fhdr.f_symptr + fhdr.f_nsyms*SYMESZ), *n_strtab);
 762
 763     nb_syms = fhdr.f_nsyms;
 764
 765     for (i = 0, ext_sym = coff_symtab; i < nb_syms; i++, ext_sym++) {
 766       if (strstart(ext_sym->e.e_name, ".text", NULL))
 767                   text_shndx = ext_sym->e_scnum;
 768           if (strstart(ext_sym->e.e_name, ".data", NULL))
 769                   data_shndx = ext_sym->e_scnum;
 770     }
 771
 772         /* set coff symbol */
 773         symtab = malloc(sizeof(struct coff_sym) * nb_syms);
 774
 775         for (i = 0, ext_sym = coff_symtab, sym = symtab; i < nb_syms; i++, ext_sym++, sym++) {
 776                 memset(sym, 0, sizeof(*sym));
 777                 sym->st_syment = ext_sym;
 778                 sym_ent_name(ext_sym, sym);
 779                 sym->st_value = ext_sym->e_value;
 780
 781                 aux_size = *(int8_t *)ext_sym->e_numaux;
 782                 if (ext_sym->e_scnum == text_shndx && ext_sym->e_type == T_FUNCTION) {
 783                         for (j = aux_size + 1; j < nb_syms - i; j++) {
 784                                 if ((ext_sym + j)->e_scnum == text_shndx &&
 785                                         (ext_sym + j)->e_type == T_FUNCTION ){
 786                                         sym->st_size = (ext_sym + j)->e_value - ext_sym->e_value;
 787                                         break;
 788                                 } else if (j == nb_syms - i - 1) {
 789                                         sec = &shdr[coff_text_shndx];
 790                                         sym->st_size = sec->s_size - ext_sym->e_value;
 791                                         break;
 792                                 }
 793                         }
 794                 } else if (ext_sym->e_scnum == data_shndx && *(uint8_t *)ext_sym->e_sclass == C_EXTERNAL) {
 795                         for (j = aux_size + 1; j < nb_syms - i; j++) {
 796                                 if ((ext_sym + j)->e_scnum == data_shndx) {
 797                                         sym->st_size = (ext_sym + j)->e_value - ext_sym->e_value;
 798                                         break;
 799                                 } else if (j == nb_syms - i - 1) {
 800                                         sec = &shdr[coff_data_shndx];
 801                                         sym->st_size = sec->s_size - ext_sym->e_value;
 802                                         break;
 803                                 }
 804                         }
 805                 } else {
 806                         sym->st_size = 0;
 807                 }
 808
 809                 sym->st_type = ext_sym->e_type;
 810                 sym->st_shndx = ext_sym->e_scnum;
 811         }
 812
 813
 814     /* find text relocations, if any */
 815     sec = &shdr[coff_text_shndx];
 816     coff_relocs = load_data(fd, sec->s_relptr, sec->s_nreloc*RELSZ);
 817     nb_relocs = sec->s_nreloc;
 818
 819     /* set coff relocation */
 820     relocs = malloc(sizeof(struct coff_rel) * nb_relocs);
 821     for (i = 0, ext_rel = coff_relocs, rel = relocs; i < nb_relocs;
 822          i++, ext_rel++, rel++) {
 823         memset(rel, 0, sizeof(*rel));
 824         rel->r_reloc = ext_rel;
 825         rel->r_offset = *(uint32_t *)ext_rel->r_vaddr;
 826         rel->r_type = *(uint16_t *)ext_rel->r_type;
 827     }
 828     return 0;
 829 }
 830
 831 #endif /* CONFIG_FORMAT_COFF */
 832
 833 #ifdef CONFIG_FORMAT_MACH
 834
 835 /* File Header */
 836 struct mach_header      mach_hdr;
 837
 838 /* commands */
 839 struct segment_command  *segment = 0;
 840 struct dysymtab_command *dysymtabcmd = 0;
 841 struct symtab_command   *symtabcmd = 0;
 842
 843 /* section */
 844 struct section  *section_hdr;
 845 struct section *text_sec_hdr;
 846 uint8_t         **sdata;
 847
 848 /* relocs */
 849 struct relocation_info *relocs;
 850
 851 /* symbols */
 852 EXE_SYM                 *symtab;
 853 struct nlist    *symtab_std;
 854 char                    *strtab;
 855
 856 /* indirect symbols */
 857 uint32_t        *tocdylib;
 858
 859 /* Utility functions */
 860
 861 static inline char *find_str_by_index(int index)
 862 {
 863     return strtab+index;
 864 }
 865
 866 /* Used by dyngen common code */
 867 static char *get_sym_name(EXE_SYM *sym)
 868 {
 869         char *name = find_str_by_index(sym->n_un.n_strx);
 870
 871         if ( sym->n_type & N_STAB ) /* Debug symbols are ignored */
 872                 return "debug";
 873
 874         if(!name)
 875                 return name;
 876         if(name[0]=='_')
 877                 return name + 1;
 878         else
 879                 return name;
 880 }
 881
 882 /* find a section index given its segname, sectname */
 883 static int find_mach_sec_index(struct section *section_hdr, int shnum, const char *segname,
 884                                   const char *sectname)
 885 {
 886     int i;
 887     struct section *sec = section_hdr;
 888
 889     for(i = 0; i < shnum; i++, sec++) {
 890         if (!sec->segname || !sec->sectname)
 891             continue;
 892         if (!strcmp(sec->sectname, sectname) && !strcmp(sec->segname, segname))
 893             return i;
 894     }
 895     return -1;
 896 }
 897
 898 /* find a section header given its segname, sectname */
 899 struct section *find_mach_sec_hdr(struct section *section_hdr, int shnum, const char *segname,
 900                                   const char *sectname)
 901 {
 902     int index = find_mach_sec_index(section_hdr, shnum, segname, sectname);
 903         if(index == -1)
 904                 return NULL;
 905         return section_hdr+index;
 906 }
 907
 908
 909 static inline void fetch_next_pair_value(struct relocation_info * rel, unsigned int *value)
 910 {
 911     struct scattered_relocation_info * scarel;
 912
 913     if(R_SCATTERED & rel->r_address) {
 914         scarel = (struct scattered_relocation_info*)rel;
 915         if(scarel->r_type != PPC_RELOC_PAIR)
 916             error("fetch_next_pair_value: looking for a pair which was not found (1)");
 917         *value = scarel->r_value;
 918     } else {
 919                 if(rel->r_type != PPC_RELOC_PAIR)
 920                         error("fetch_next_pair_value: looking for a pair which was not found (2)");
 921                 *value = rel->r_address;
 922         }
 923 }
 924
 925 /* find a sym name given its value, in a section number */
 926 static const char * find_sym_with_value_and_sec_number( int value, int sectnum, int * offset )
 927 {
 928         int i, ret = -1;
 929
 930         for( i = 0 ; i < nb_syms; i++ )
 931         {
 932             if( !(symtab[i].n_type & N_STAB) && (symtab[i].n_type & N_SECT) &&
 933                          (symtab[i].n_sect ==  sectnum) && (symtab[i].st_value <= value) )
 934                 {
 935                         if( (ret<0) || (symtab[i].st_value >= symtab[ret].st_value) )
 936                                 ret = i;
 937                 }
 938         }
 939         if( ret < 0 ) {
 940                 *offset = 0;
 941                 return 0;
 942         } else {
 943                 *offset = value - symtab[ret].st_value;
 944                 return get_sym_name(&symtab[ret]);
 945         }
 946 }
 947
 948 /*
 949  *  Find symbol name given a (virtual) address, and a section which is of type
 950  *  S_NON_LAZY_SYMBOL_POINTERS or S_LAZY_SYMBOL_POINTERS or S_SYMBOL_STUBS
 951  */
 952 static const char * find_reloc_name_in_sec_ptr(int address, struct section * sec_hdr)
 953 {
 954     unsigned int tocindex, symindex, size;
 955     const char *name = 0;
 956
 957     /* Sanity check */
 958     if(!( address >= sec_hdr->addr && address < (sec_hdr->addr + sec_hdr->size) ) )
 959         return (char*)0;
 960
 961         if( sec_hdr->flags & S_SYMBOL_STUBS ){
 962                 size = sec_hdr->reserved2;
 963                 if(size == 0)
 964                     error("size = 0");
 965
 966         }
 967         else if( sec_hdr->flags & S_LAZY_SYMBOL_POINTERS ||
 968                     sec_hdr->flags & S_NON_LAZY_SYMBOL_POINTERS)
 969                 size = sizeof(unsigned long);
 970         else
 971                 return 0;
 972
 973     /* Compute our index in toc */
 974         tocindex = (address - sec_hdr->addr)/size;
 975         symindex = tocdylib[sec_hdr->reserved1 + tocindex];
 976
 977         name = get_sym_name(&symtab[symindex]);
 978
 979     return name;
 980 }
 981
 982 static const char * find_reloc_name_given_its_address(int address)
 983 {
 984     unsigned int i;
 985     for(i = 0; i < segment->nsects ; i++)
 986     {
 987         const char * name = find_reloc_name_in_sec_ptr(address, &section_hdr[i]);
 988         if((long)name != -1)
 989             return name;
 990     }
 991     return 0;
 992 }
 993
 994 static const char * get_reloc_name(EXE_RELOC * rel, int * sslide)
 995 {
 996         char * name = 0;
 997         struct scattered_relocation_info * sca_rel = (struct scattered_relocation_info*)rel;
 998         int sectnum = rel->r_symbolnum;
 999         int sectoffset;
1000         int other_half=0;
1001
1002         /* init the slide value */
1003         *sslide = 0;
1004
1005         if(R_SCATTERED & rel->r_address)
1006                 return (char *)find_reloc_name_given_its_address(sca_rel->r_value);
1007
1008         if(rel->r_extern)
1009         {
1010                 /* ignore debug sym */
1011                 if ( symtab[rel->r_symbolnum].n_type & N_STAB )
1012                         return 0;
1013                 return get_sym_name(&symtab[rel->r_symbolnum]);
1014         }
1015
1016         /* Intruction contains an offset to the symbols pointed to, in the rel->r_symbolnum section */
1017         sectoffset = *(uint32_t *)(text + rel->r_address) & 0xffff;
1018
1019         if(sectnum==0xffffff)
1020                 return 0;
1021
1022         /* Sanity Check */
1023         if(sectnum > segment->nsects)
1024                 error("sectnum > segment->nsects");
1025
1026         switch(rel->r_type)
1027         {
1028                 case PPC_RELOC_LO16: fetch_next_pair_value(rel+1, &other_half); sectoffset |= (other_half << 16);
1029                         break;
1030                 case PPC_RELOC_HI16: fetch_next_pair_value(rel+1, &other_half); sectoffset = (sectoffset << 16) | (uint16_t)(other_half & 0xffff);
1031                         break;
1032                 case PPC_RELOC_HA16: fetch_next_pair_value(rel+1, &other_half); sectoffset = (sectoffset << 16) + (int16_t)(other_half & 0xffff);
1033                         break;
1034                 case PPC_RELOC_BR24:
1035                         sectoffset = ( *(uint32_t *)(text + rel->r_address) & 0x03fffffc );
1036                         if (sectoffset & 0x02000000) sectoffset |= 0xfc000000;
1037                         break;
1038                 default:
1039                         error("switch(rel->type) not found");
1040         }
1041
1042         if(rel->r_pcrel)
1043                 sectoffset += rel->r_address;
1044
1045         if (rel->r_type == PPC_RELOC_BR24)
1046                 name = (char *)find_reloc_name_in_sec_ptr((int)sectoffset, &section_hdr[sectnum-1]);
1047
1048         /* search it in the full symbol list, if not found */
1049         if(!name)
1050                 name = (char *)find_sym_with_value_and_sec_number(sectoffset, sectnum, sslide);
1051
1052         return name;
1053 }
1054
1055 /* Used by dyngen common code */
1056 static const char * get_rel_sym_name(EXE_RELOC * rel)
1057 {
1058         int sslide;
1059         return get_reloc_name( rel, &sslide);
1060 }
1061
1062 /* Used by dyngen common code */
1063 static host_ulong get_rel_offset(EXE_RELOC *rel)
1064 {
1065         struct scattered_relocation_info * sca_rel = (struct scattered_relocation_info*)rel;
1066     if(R_SCATTERED & rel->r_address)
1067                 return sca_rel->r_address;
1068         else
1069                 return rel->r_address;
1070 }
1071
1072 /* load a mach-o object file */
1073 int load_object(const char *filename)
1074 {
1075         int fd;
1076         unsigned int offset_to_segment = 0;
1077     unsigned int offset_to_dysymtab = 0;
1078     unsigned int offset_to_symtab = 0;
1079     struct load_command lc;
1080     unsigned int i, j;
1081         EXE_SYM *sym;
1082         struct nlist *syment;
1083
1084         fd = open(filename, O_RDONLY);
1085     if (fd < 0)
1086         error("can't open file '%s'", filename);
1087
1088     /* Read Mach header.  */
1089     if (read(fd, &mach_hdr, sizeof (mach_hdr)) != sizeof (mach_hdr))
1090         error("unable to read file header");
1091
1092     /* Check Mach identification.  */
1093     if (!check_mach_header(mach_hdr)) {
1094         error("bad Mach header");
1095     }
1096
1097     if (mach_hdr.cputype != CPU_TYPE_POWERPC)
1098         error("Unsupported CPU");
1099
1100     if (mach_hdr.filetype != MH_OBJECT)
1101         error("Unsupported Mach Object");
1102
1103     /* read segment headers */
1104     for(i=0, j=sizeof(mach_hdr); i<mach_hdr.ncmds ; i++)
1105     {
1106         if(read(fd, &lc, sizeof(struct load_command)) != sizeof(struct load_command))
1107             error("unable to read load_command");
1108         if(lc.cmd == LC_SEGMENT)
1109         {
1110             offset_to_segment = j;
1111             lseek(fd, offset_to_segment, SEEK_SET);
1112             segment = malloc(sizeof(struct segment_command));
1113             if(read(fd, segment, sizeof(struct segment_command)) != sizeof(struct segment_command))
1114                 error("unable to read LC_SEGMENT");
1115         }
1116         if(lc.cmd == LC_DYSYMTAB)
1117         {
1118             offset_to_dysymtab = j;
1119             lseek(fd, offset_to_dysymtab, SEEK_SET);
1120             dysymtabcmd = malloc(sizeof(struct dysymtab_command));
1121             if(read(fd, dysymtabcmd, sizeof(struct dysymtab_command)) != sizeof(struct dysymtab_command))
1122                 error("unable to read LC_DYSYMTAB");
1123         }
1124         if(lc.cmd == LC_SYMTAB)
1125         {
1126             offset_to_symtab = j;
1127             lseek(fd, offset_to_symtab, SEEK_SET);
1128             symtabcmd = malloc(sizeof(struct symtab_command));
1129             if(read(fd, symtabcmd, sizeof(struct symtab_command)) != sizeof(struct symtab_command))
1130                 error("unable to read LC_SYMTAB");
1131         }
1132         j+=lc.cmdsize;
1133
1134         lseek(fd, j, SEEK_SET);
1135     }
1136
1137     if(!segment)
1138         error("unable to find LC_SEGMENT");
1139
1140     /* read section headers */
1141     section_hdr = load_data(fd, offset_to_segment + sizeof(struct segment_command), segment->nsects * sizeof(struct section));
1142
1143     /* read all section data */
1144     sdata = (uint8_t **)malloc(sizeof(void *) * segment->nsects);
1145     memset(sdata, 0, sizeof(void *) * segment->nsects);
1146
1147         /* Load the data in section data */
1148         for(i = 0; i < segment->nsects; i++) {
1149         sdata[i] = load_data(fd, section_hdr[i].offset, section_hdr[i].size);
1150     }
1151
1152     /* text section */
1153         text_sec_hdr = find_mach_sec_hdr(section_hdr, segment->nsects, SEG_TEXT, SECT_TEXT);
1154         i = find_mach_sec_index(section_hdr, segment->nsects, SEG_TEXT, SECT_TEXT);
1155         if (i == -1 || !text_sec_hdr)
1156         error("could not find __TEXT,__text section");
1157     text = sdata[i];
1158
1159     /* Make sure dysym was loaded */
1160     if(!(int)dysymtabcmd)
1161         error("could not find __DYSYMTAB segment");
1162
1163     /* read the table of content of the indirect sym */
1164     tocdylib = load_data( fd, dysymtabcmd->indirectsymoff, dysymtabcmd->nindirectsyms * sizeof(uint32_t) );
1165
1166     /* Make sure symtab was loaded  */
1167     if(!(int)symtabcmd)
1168         error("could not find __SYMTAB segment");
1169     nb_syms = symtabcmd->nsyms;
1170
1171     symtab_std = load_data(fd, symtabcmd->symoff, symtabcmd->nsyms * sizeof(struct nlist));
1172     strtab = load_data(fd, symtabcmd->stroff, symtabcmd->strsize);
1173
1174         symtab = malloc(sizeof(EXE_SYM) * nb_syms);
1175
1176         /* Now transform the symtab, to an extended version, with the sym size, and the C name */
1177         for(i = 0, sym = symtab, syment = symtab_std; i < nb_syms; i++, sym++, syment++) {
1178         struct nlist *sym_follow, *sym_next = 0;
1179         unsigned int j;
1180                 memset(sym, 0, sizeof(*sym));
1181
1182                 if ( syment->n_type & N_STAB ) /* Debug symbols are skipped */
1183             continue;
1184
1185                 memcpy(sym, syment, sizeof(*syment));
1186
1187                 /* Find the following symbol in order to get the current symbol size */
1188         for(j = 0, sym_follow = symtab_std; j < nb_syms; j++, sym_follow++) {
1189             if ( sym_follow->n_sect != 1 || sym_follow->n_type & N_STAB || !(sym_follow->n_value > sym->st_value))
1190                 continue;
1191             if(!sym_next) {
1192                 sym_next = sym_follow;
1193                 continue;
1194             }
1195             if(!(sym_next->n_value > sym_follow->n_value))
1196                 continue;
1197             sym_next = sym_follow;
1198         }
1199                 if(sym_next)
1200             sym->st_size = sym_next->n_value - sym->st_value;
1201                 else
1202             sym->st_size = text_sec_hdr->size - sym->st_value;
1203         }
1204
1205     /* Find Reloc */
1206     relocs = load_data(fd, text_sec_hdr->reloff, text_sec_hdr->nreloc * sizeof(struct relocation_info));
1207     nb_relocs = text_sec_hdr->nreloc;
1208
1209         close(fd);
1210         return 0;
1211 }
1212
1213 #endif /* CONFIG_FORMAT_MACH */
1214
1215 /* return true if the expression is a label reference */
1216 int get_reloc_expr(char *name, int name_size, const char *sym_name)
1217 {
1218     const char *p;
1219
1220     if (strstart(sym_name, "__op_param", &p)) {
1221         snprintf(name, name_size, "param%s", p);
1222     } else if (strstart(sym_name, "__op_gen_label", &p)) {
1223         snprintf(name, name_size, "param%s", p);
1224         return 1;
1225     } else {
1226 #ifdef HOST_SPARC
1227         if (sym_name[0] == '.')
1228             snprintf(name, name_size,
1229                      "(long)(&__dot_%s)",
1230                      sym_name + 1);
1231         else
1232 #endif
1233             snprintf(name, name_size, "(long)(&%s)", sym_name);
1234     }
1235     return 0;
1236 }
1237
1238 #ifdef HOST_IA64
1239
1240 #define PLT_ENTRY_SIZE  16      /* 1 bundle containing "brl" */
1241
1242 struct plt_entry {
1243     struct plt_entry *next;
1244     const char *name;
1245     unsigned long addend;
1246 } *plt_list;
1247
1248 static int
1249 get_plt_index (const char *name, unsigned long addend)
1250 {
1251     struct plt_entry *plt, *prev= NULL;
1252     int index = 0;
1253
1254     /* see if we already have an entry for this target: */
1255     for (plt = plt_list; plt; ++index, prev = plt, plt = plt->next)
1256         if (strcmp(plt->name, name) == 0 && plt->addend == addend)
1257             return index;
1258
1259     /* nope; create a new PLT entry: */
1260
1261     plt = malloc(sizeof(*plt));
1262     if (!plt) {
1263         perror("malloc");
1264         exit(1);
1265     }
1266     memset(plt, 0, sizeof(*plt));
1267     plt->name = strdup(name);
1268     plt->addend = addend;
1269
1270     /* append to plt-list: */
1271     if (prev)
1272         prev->next = plt;
1273     else
1274         plt_list = plt;
1275     return index;
1276 }
1277
1278 #endif
1279
1280 #ifdef HOST_ARM
1281
1282 int arm_emit_ldr_info(const char *name, unsigned long start_offset,
1283                       FILE *outfile, uint8_t *p_start, uint8_t *p_end,
1284                       ELF_RELOC *relocs, int nb_relocs)
1285 {
1286     uint8_t *p;
1287     uint32_t insn;
1288     int offset, min_offset, pc_offset, data_size, spare, max_pool;
1289     uint8_t data_allocated[1024];
1290     unsigned int data_index;
1291     int type;
1292
1293     memset(data_allocated, 0, sizeof(data_allocated));
1294
1295     p = p_start;
1296     min_offset = p_end - p_start;
1297     spare = 0x7fffffff;
1298     while (p < p_start + min_offset) {
1299         insn = get32((uint32_t *)p);
1300         /* TODO: Armv5e ldrd.  */
1301         /* TODO: VFP load.  */
1302         if ((insn & 0x0d5f0000) == 0x051f0000) {
1303             /* ldr reg, [pc, #im] */
1304             offset = insn & 0xfff;
1305             if (!(insn & 0x00800000))
1306                 offset = -offset;
1307             max_pool = 4096;
1308             type = 0;
1309         } else if ((insn & 0x0e5f0f00) == 0x0c1f0100) {
1310             /* FPA ldf.  */
1311             offset = (insn & 0xff) << 2;
1312             if (!(insn & 0x00800000))
1313                 offset = -offset;
1314             max_pool = 1024;
1315             type = 1;
1316         } else if ((insn & 0x0fff0000) == 0x028f0000) {
1317             /* Some gcc load a doubleword immediate with
1318                add regN, pc, #imm
1319                ldmia regN, {regN, regM}
1320                Hope and pray the compiler never generates somethin like
1321                add reg, pc, #imm1; ldr reg, [reg, #-imm2]; */
1322             int r;
1323
1324             r = (insn & 0xf00) >> 7;
1325             offset = ((insn & 0xff) >> r) | ((insn & 0xff) << (32 - r));
1326             max_pool = 1024;
1327             type = 2;
1328         } else {
1329             max_pool = 0;
1330             type = -1;
1331         }
1332         if (type >= 0) {
1333             /* PC-relative load needs fixing up.  */
1334             if (spare > max_pool - offset)
1335                 spare = max_pool - offset;
1336             if ((offset & 3) !=0)
1337                 error("%s:%04x: pc offset must be 32 bit aligned",
1338                       name, start_offset + p - p_start);
1339             if (offset < 0)
1340                 error("%s:%04x: Embedded literal value",
1341                       name, start_offset + p - p_start);
1342             pc_offset = p - p_start + offset + 8;
1343             if (pc_offset <= (p - p_start) ||
1344                 pc_offset >= (p_end - p_start))
1345                 error("%s:%04x: pc offset must point inside the function code",
1346                       name, start_offset + p - p_start);
1347             if (pc_offset < min_offset)
1348                 min_offset = pc_offset;
1349             if (outfile) {
1350                 /* The intruction position */
1351                 fprintf(outfile, "    arm_ldr_ptr->ptr = gen_code_ptr + %d;\n",
1352                         p - p_start);
1353                 /* The position of the constant pool data.  */
1354                 data_index = ((p_end - p_start) - pc_offset) >> 2;
1355                 fprintf(outfile, "    arm_ldr_ptr->data_ptr = arm_data_ptr - %d;\n",
1356                         data_index);
1357                 fprintf(outfile, "    arm_ldr_ptr->type = %d;\n", type);
1358                 fprintf(outfile, "    arm_ldr_ptr++;\n");
1359             }
1360         }
1361         p += 4;
1362     }
1363
1364     /* Copy and relocate the constant pool data.  */
1365     data_size = (p_end - p_start) - min_offset;
1366     if (data_size > 0 && outfile) {
1367         spare += min_offset;
1368         fprintf(outfile, "    arm_data_ptr -= %d;\n", data_size >> 2);
1369         fprintf(outfile, "    arm_pool_ptr -= %d;\n", data_size);
1370         fprintf(outfile, "    if (arm_pool_ptr > gen_code_ptr + %d)\n"
1371                          "        arm_pool_ptr = gen_code_ptr + %d;\n",
1372                          spare, spare);
1373
1374         data_index = 0;
1375         for (pc_offset = min_offset;
1376              pc_offset < p_end - p_start;
1377              pc_offset += 4) {
1378
1379             ELF_RELOC *rel;
1380             int i, addend, type;
1381             const char *sym_name;
1382             char relname[1024];
1383
1384             /* data value */
1385             addend = get32((uint32_t *)(p_start + pc_offset));
1386             relname[0] = '\0';
1387             for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1388                 if (rel->r_offset == (pc_offset + start_offset)) {
1389                     sym_name = get_rel_sym_name(rel);
1390                     /* the compiler leave some unnecessary references to the code */
1391                     get_reloc_expr(relname, sizeof(relname), sym_name);
1392                     type = ELF32_R_TYPE(rel->r_info);
1393                     if (type != R_ARM_ABS32)
1394                         error("%s: unsupported data relocation", name);
1395                     break;
1396                 }
1397             }
1398             fprintf(outfile, "    arm_data_ptr[%d] = 0x%x",
1399                     data_index, addend);
1400             if (relname[0] != '\0')
1401                 fprintf(outfile, " + %s", relname);
1402             fprintf(outfile, ";\n");
1403
1404             data_index++;
1405         }
1406     }
1407
1408     if (p == p_start)
1409         goto arm_ret_error;
1410     p -= 4;
1411     insn = get32((uint32_t *)p);
1412     /* The last instruction must be an ldm instruction.  There are several
1413        forms generated by gcc:
1414         ldmib sp, {..., pc}  (implies a sp adjustment of +4)
1415         ldmia sp, {..., pc}
1416         ldmea fp, {..., pc} */
1417     if ((insn & 0xffff8000) == 0xe99d8000) {
1418         if (outfile) {
1419             fprintf(outfile,
1420                     "    *(uint32_t *)(gen_code_ptr + %d) = 0xe28dd004;\n",
1421                     p - p_start);
1422         }
1423         p += 4;
1424     } else if ((insn & 0xffff8000) != 0xe89d8000
1425         && (insn & 0xffff8000) != 0xe91b8000) {
1426     arm_ret_error:
1427         if (!outfile)
1428             printf("%s: invalid epilog\n", name);
1429     }
1430     return p - p_start;
1431 }
1432 #endif
1433
1434
1435 #define MAX_ARGS 3
1436
1437 /* generate op code */
1438 void gen_code(const char *name, host_ulong offset, host_ulong size,
1439               FILE *outfile, int gen_switch)
1440 {
1441     int copy_size = 0;
1442     uint8_t *p_start, *p_end;
1443     host_ulong start_offset;
1444     int nb_args, i, n;
1445     uint8_t args_present[MAX_ARGS];
1446     const char *sym_name, *p;
1447     EXE_RELOC *rel;
1448
1449     /* Compute exact size excluding prologue and epilogue instructions.
1450      * Increment start_offset to skip epilogue instructions, then compute
1451      * copy_size the indicate the size of the remaining instructions (in
1452      * bytes).
1453      */
1454     p_start = text + offset;
1455     p_end = p_start + size;
1456     start_offset = offset;
1457 #if defined(HOST_I386) || defined(HOST_X86_64)
1458 #ifdef CONFIG_FORMAT_COFF
1459     {
1460         uint8_t *p;
1461         p = p_end - 1;
1462         if (p == p_start)
1463             error("empty code for %s", name);
1464         while (*p != 0xc3) {
1465             p--;
1466             if (p <= p_start)
1467                 error("ret or jmp expected at the end of %s", name);
1468         }
1469         copy_size = p - p_start;
1470     }
1471 #else
1472     {
1473         int len;
1474         len = p_end - p_start;
1475         if (len == 0)
1476             error("empty code for %s", name);
1477         if (p_end[-1] == 0xc3) {
1478             len--;
1479         } else {
1480             error("ret or jmp expected at the end of %s", name);
1481         }
1482         copy_size = len;
1483     }
1484 #endif
1485 #elif defined(HOST_PPC)
1486     {
1487         uint8_t *p;
1488         p = (void *)(p_end - 4);
1489         if (p == p_start)
1490             error("empty code for %s", name);
1491         if (get32((uint32_t *)p) != 0x4e800020)
1492             error("blr expected at the end of %s", name);
1493         copy_size = p - p_start;
1494     }
1495 #elif defined(HOST_S390)
1496     {
1497         uint8_t *p;
1498         p = (void *)(p_end - 2);
1499         if (p == p_start)
1500             error("empty code for %s", name);
1501         if ((get16((uint16_t *)p) & 0xfff0) != 0x07f0)
1502             error("br expected at the end of %s", name);
1503         copy_size = p - p_start;
1504     }
1505 #elif defined(HOST_ALPHA)
1506     {
1507         uint8_t *p;
1508         p = p_end - 4;
1509 #if 0
1510         /* XXX: check why it occurs */
1511         if (p == p_start)
1512             error("empty code for %s", name);
1513 #endif
1514         if (get32((uint32_t *)p) != 0x6bfa8001)
1515             error("ret expected at the end of %s", name);
1516         copy_size = p - p_start;
1517     }
1518 #elif defined(HOST_IA64)
1519     {
1520         uint8_t *p;
1521         p = (void *)(p_end - 4);
1522         if (p == p_start)
1523             error("empty code for %s", name);
1524         /* br.ret.sptk.many b0;; */
1525         /* 08 00 84 00 */
1526         if (get32((uint32_t *)p) != 0x00840008)
1527             error("br.ret.sptk.many b0;; expected at the end of %s", name);
1528         copy_size = p_end - p_start;
1529     }
1530 #elif defined(HOST_SPARC)
1531     {
1532 #define INSN_SAVE       0x9de3a000
1533 #define INSN_RET        0x81c7e008
1534 #define INSN_RETL       0x81c3e008
1535 #define INSN_RESTORE    0x81e80000
1536 #define INSN_RETURN     0x81cfe008
1537 #define INSN_NOP        0x01000000
1538 #define INSN_ADD_SP     0x9c03a000 // add %sp, nn, %sp
1539 #define INSN_SUB_SP     0x9c23a000 // sub %sp, nn, %sp
1540
1541         uint32_t start_insn, end_insn1, end_insn2;
1542         uint8_t *p;
1543         p = (void *)(p_end - 8);
1544         if (p <= p_start)
1545             error("empty code for %s", name);
1546         start_insn = get32((uint32_t *)(p_start + 0x0));
1547         end_insn1 = get32((uint32_t *)(p + 0x0));
1548         end_insn2 = get32((uint32_t *)(p + 0x4));
1549         if (((start_insn & ~0x1fff) == INSN_SAVE) ||
1550             (start_insn & ~0x1fff) == INSN_ADD_SP) {
1551             p_start += 0x4;
1552             start_offset += 0x4;
1553             if (end_insn1 == INSN_RET && end_insn2 == INSN_RESTORE)
1554                 /* SPARC v7: ret; restore; */ ;
1555             else if (end_insn1 == INSN_RETURN && end_insn2 == INSN_NOP)
1556                 /* SPARC v9: return; nop; */ ;
1557             else if (end_insn1 == INSN_RETL && (end_insn2 & ~0x1fff) == INSN_SUB_SP)
1558                 /* SPARC v7: retl; sub %sp, nn, %sp; */ ;
1559             else
1560
1561                 error("ret; restore; not found at end of %s", name);
1562         } else if (end_insn1 == INSN_RETL && end_insn2 == INSN_NOP) {
1563             ;
1564         } else {
1565             error("No save at the beginning of %s", name);
1566         }
1567 #if 0
1568         /* Skip a preceeding nop, if present.  */
1569         if (p > p_start) {
1570             skip_insn = get32((uint32_t *)(p - 0x4));
1571             if (skip_insn == INSN_NOP)
1572                 p -= 4;
1573         }
1574 #endif
1575         copy_size = p - p_start;
1576     }
1577 #elif defined(HOST_SPARC64)
1578     {
1579 #define INSN_SAVE       0x9de3a000
1580 #define INSN_RET        0x81c7e008
1581 #define INSN_RETL       0x81c3e008
1582 #define INSN_RESTORE    0x81e80000
1583 #define INSN_RETURN     0x81cfe008
1584 #define INSN_NOP        0x01000000
1585 #define INSN_ADD_SP     0x9c03a000 // add %sp, nn, %sp
1586 #define INSN_SUB_SP     0x9c23a000 // sub %sp, nn, %sp
1587
1588         uint32_t start_insn, end_insn1, end_insn2, skip_insn;
1589         uint8_t *p;
1590         p = (void *)(p_end - 8);
1591 #if 0
1592         /* XXX: check why it occurs */
1593         if (p <= p_start)
1594             error("empty code for %s", name);
1595 #endif
1596         start_insn = get32((uint32_t *)(p_start + 0x0));
1597         end_insn1 = get32((uint32_t *)(p + 0x0));
1598         end_insn2 = get32((uint32_t *)(p + 0x4));
1599         if (((start_insn & ~0x1fff) == INSN_SAVE) ||
1600             (start_insn & ~0x1fff) == INSN_ADD_SP) {
1601             p_start += 0x4;
1602             start_offset += 0x4;
1603             if (end_insn1 == INSN_RET && end_insn2 == INSN_RESTORE)
1604                 /* SPARC v7: ret; restore; */ ;
1605             else if (end_insn1 == INSN_RETURN && end_insn2 == INSN_NOP)
1606                 /* SPARC v9: return; nop; */ ;
1607             else if (end_insn1 == INSN_RETL && (end_insn2 & ~0x1fff) == INSN_SUB_SP)
1608                 /* SPARC v7: retl; sub %sp, nn, %sp; */ ;
1609             else
1610
1611                 error("ret; restore; not found at end of %s", name);
1612         } else if (end_insn1 == INSN_RETL && end_insn2 == INSN_NOP) {
1613             ;
1614         } else {
1615             error("No save at the beginning of %s", name);
1616         }
1617
1618         /* Skip a preceeding nop, if present.  */
1619         if (p > p_start) {
1620             skip_insn = get32((uint32_t *)(p - 0x4));
1621             if (skip_insn == 0x01000000)
1622                 p -= 4;
1623         }
1624
1625         copy_size = p - p_start;
1626     }
1627 #elif defined(HOST_ARM)
1628     {
1629         uint32_t insn;
1630
1631         if ((p_end - p_start) <= 16)
1632             error("%s: function too small", name);
1633         if (get32((uint32_t *)p_start) != 0xe1a0c00d ||
1634             (get32((uint32_t *)(p_start + 4)) & 0xffff0000) != 0xe92d0000 ||
1635             get32((uint32_t *)(p_start + 8)) != 0xe24cb004)
1636             error("%s: invalid prolog", name);
1637         p_start += 12;
1638         start_offset += 12;
1639         insn = get32((uint32_t *)p_start);
1640         if ((insn & 0xffffff00) == 0xe24dd000) {
1641             /* Stack adjustment.  Assume op uses the frame pointer.  */
1642             p_start -= 4;
1643             start_offset -= 4;
1644         }
1645         copy_size = arm_emit_ldr_info(name, start_offset, NULL, p_start, p_end,
1646                                       relocs, nb_relocs);
1647     }
1648 #elif defined(HOST_M68K)
1649     {
1650         uint8_t *p;
1651         p = (void *)(p_end - 2);
1652         if (p == p_start)
1653             error("empty code for %s", name);
1654         // remove NOP's, probably added for alignment
1655         while ((get16((uint16_t *)p) == 0x4e71) &&
1656                (p>p_start))
1657             p -= 2;
1658         if (get16((uint16_t *)p) != 0x4e75)
1659             error("rts expected at the end of %s", name);
1660         copy_size = p - p_start;
1661     }
1662 #elif defined(HOST_MIPS) || defined(HOST_MIPS64)
1663     {
1664 #define INSN_RETURN     0x03e00008
1665 #define INSN_NOP        0x00000000
1666
1667         uint8_t *p = p_end;
1668
1669         if (p < (p_start + 0x8)) {
1670             error("empty code for %s", name);
1671         } else {
1672             uint32_t end_insn1, end_insn2;
1673
1674             p -= 0x8;
1675             end_insn1 = get32((uint32_t *)(p + 0x0));
1676             end_insn2 = get32((uint32_t *)(p + 0x4));
1677             if (end_insn1 != INSN_RETURN && end_insn2 != INSN_NOP)
1678                 error("jr ra not found at end of %s", name);
1679         }
1680         copy_size = p - p_start;
1681     }
1682 #else
1683 #error unsupported CPU
1684 #endif
1685
1686     /* compute the number of arguments by looking at the relocations */
1687     for(i = 0;i < MAX_ARGS; i++)
1688         args_present[i] = 0;
1689
1690     for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1691         host_ulong offset = get_rel_offset(rel);
1692         if (offset >= start_offset &&
1693             offset < start_offset + (p_end - p_start)) {
1694             sym_name = get_rel_sym_name(rel);
1695             if(!sym_name)
1696                 continue;
1697             if (strstart(sym_name, "__op_param", &p) ||
1698                 strstart(sym_name, "__op_gen_label", &p)) {
1699                 n = strtoul(p, NULL, 10);
1700                 if (n > MAX_ARGS)
1701                     error("too many arguments in %s", name);
1702                 args_present[n - 1] = 1;
1703             }
1704         }
1705     }
1706
1707     nb_args = 0;
1708     while (nb_args < MAX_ARGS && args_present[nb_args])
1709         nb_args++;
1710     for(i = nb_args; i < MAX_ARGS; i++) {
1711         if (args_present[i])
1712             error("inconsistent argument numbering in %s", name);
1713     }
1714
1715     if (gen_switch == 2) {
1716         fprintf(outfile, "DEF(%s, %d, %d)\n", name + 3, nb_args, copy_size);
1717     } else if (gen_switch == 1) {
1718
1719         /* output C code */
1720         fprintf(outfile, "case INDEX_%s: {\n", name);
1721         if (nb_args > 0) {
1722             fprintf(outfile, "    long ");
1723             for(i = 0; i < nb_args; i++) {
1724                 if (i != 0)
1725                     fprintf(outfile, ", ");
1726                 fprintf(outfile, "param%d", i + 1);
1727             }
1728             fprintf(outfile, ";\n");
1729         }
1730 #if defined(HOST_IA64)
1731         fprintf(outfile, "    extern char %s;\n", name);
1732 #else
1733         fprintf(outfile, "    extern void %s();\n", name);
1734 #endif
1735
1736         for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1737             host_ulong offset = get_rel_offset(rel);
1738             if (offset >= start_offset &&
1739                 offset < start_offset + (p_end - p_start)) {
1740                 sym_name = get_rel_sym_name(rel);
1741                 if(!sym_name)
1742                     continue;
1743                 if (*sym_name &&
1744                     !strstart(sym_name, "__op_param", NULL) &&
1745                     !strstart(sym_name, "__op_jmp", NULL) &&
1746                     !strstart(sym_name, "__op_gen_label", NULL)) {
1747 #if defined(HOST_SPARC)
1748                     if (sym_name[0] == '.') {
1749                         fprintf(outfile,
1750                                 "extern char __dot_%s __asm__(\"%s\");\n",
1751                                 sym_name+1, sym_name);
1752                         continue;
1753                     }
1754 #endif
1755 #if defined(__APPLE__)
1756                     /* Set __attribute((unused)) on darwin because we
1757                        want to avoid warning when we don't use the symbol.  */
1758                     fprintf(outfile, "    extern char %s __attribute__((unused));\n", sym_name);
1759 #elif defined(HOST_IA64)
1760                         if (ELF64_R_TYPE(rel->r_info) != R_IA64_PCREL21B)
1761                                 /*
1762                                  * PCREL21 br.call targets generally
1763                                  * are out of range and need to go
1764                                  * through an "import stub".
1765                                  */
1766                                 fprintf(outfile, "    extern char %s;\n",
1767                                         sym_name);
1768 #else
1769                     fprintf(outfile, "extern char %s;\n", sym_name);
1770 #endif
1771                 }
1772             }
1773         }
1774
1775         fprintf(outfile, "    memcpy(gen_code_ptr, (void *)((char *)&%s+%d), %d);\n",
1776                                         name, (int)(start_offset - offset), copy_size);
1777
1778         /* emit code offset information */
1779         {
1780             EXE_SYM *sym;
1781             const char *sym_name, *p;
1782             host_ulong val;
1783             int n;
1784
1785             for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
1786                 sym_name = get_sym_name(sym);
1787                 if (strstart(sym_name, "__op_label", &p)) {
1788                     uint8_t *ptr;
1789                     unsigned long offset;
1790
1791                     /* test if the variable refers to a label inside
1792                        the code we are generating */
1793 #ifdef CONFIG_FORMAT_COFF
1794                     if (sym->st_shndx == text_shndx) {
1795                         ptr = sdata[coff_text_shndx];
1796                     } else if (sym->st_shndx == data_shndx) {
1797                         ptr = sdata[coff_data_shndx];
1798                     } else {
1799                         ptr = NULL;
1800                     }
1801 #elif defined(CONFIG_FORMAT_MACH)
1802                     if(!sym->n_sect)
1803                         continue;
1804                     ptr = sdata[sym->n_sect-1];
1805 #else
1806                     ptr = sdata[sym->st_shndx];
1807 #endif
1808                     if (!ptr)
1809                         error("__op_labelN in invalid section");
1810                     offset = sym->st_value;
1811 #ifdef CONFIG_FORMAT_MACH
1812                     offset -= section_hdr[sym->n_sect-1].addr;
1813 #endif
1814                     val = *(host_ulong *)(ptr + offset);
1815 #ifdef ELF_USES_RELOCA
1816                     {
1817                         int reloc_shndx, nb_relocs1, j;
1818
1819                         /* try to find a matching relocation */
1820                         reloc_shndx = find_reloc(sym->st_shndx);
1821                         if (reloc_shndx) {
1822                             nb_relocs1 = shdr[reloc_shndx].sh_size /
1823                                 shdr[reloc_shndx].sh_entsize;
1824                             rel = (ELF_RELOC *)sdata[reloc_shndx];
1825                             for(j = 0; j < nb_relocs1; j++) {
1826                                 if (rel->r_offset == offset) {
1827                                     val = rel->r_addend;
1828                                     break;
1829                                 }
1830                                 rel++;
1831                             }
1832                         }
1833                     }
1834 #endif
1835                     if (val >= start_offset && val <= start_offset + copy_size) {
1836                         n = strtol(p, NULL, 10);
1837                         fprintf(outfile, "    label_offsets[%d] = %ld + (gen_code_ptr - gen_code_buf);\n", n, (long)(val - start_offset));
1838                     }
1839                 }
1840             }
1841         }
1842
1843         /* load parameters in variables */
1844         for(i = 0; i < nb_args; i++) {
1845             fprintf(outfile, "    param%d = *opparam_ptr++;\n", i + 1);
1846         }
1847
1848         /* patch relocations */
1849 #if defined(HOST_I386)
1850             {
1851                 char relname[256];
1852                 int type, is_label;
1853                 int addend;
1854                 int reloc_offset;
1855                 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1856                 if (rel->r_offset >= start_offset &&
1857                     rel->r_offset < start_offset + copy_size) {
1858                     sym_name = get_rel_sym_name(rel);
1859                     if (!sym_name)
1860                         continue;
1861                     reloc_offset = rel->r_offset - start_offset;
1862                     if (strstart(sym_name, "__op_jmp", &p)) {
1863                         int n;
1864                         n = strtol(p, NULL, 10);
1865                         /* __op_jmp relocations are done at
1866                            runtime to do translated block
1867                            chaining: the offset of the instruction
1868                            needs to be stored */
1869                         fprintf(outfile, "    jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
1870                                 n, reloc_offset);
1871                         continue;
1872                     }
1873
1874                     is_label = get_reloc_expr(relname, sizeof(relname), sym_name);
1875                     addend = get32((uint32_t *)(text + rel->r_offset));
1876 #ifdef CONFIG_FORMAT_ELF
1877                     type = ELF32_R_TYPE(rel->r_info);
1878                     if (is_label) {
1879                         switch(type) {
1880                         case R_386_32:
1881                         case R_386_PC32:
1882                             fprintf(outfile, "    tcg_out_reloc(s, gen_code_ptr + %d, %d, %s, %d);\n",
1883                                     reloc_offset, type, relname, addend);
1884                             break;
1885                         default:
1886                             error("unsupported i386 relocation (%d)", type);
1887                         }
1888                     } else {
1889                         switch(type) {
1890                         case R_386_32:
1891                             fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
1892                                     reloc_offset, relname, addend);
1893                             break;
1894                         case R_386_PC32:
1895                             fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d;\n",
1896                                     reloc_offset, relname, reloc_offset, addend);
1897                             break;
1898                         default:
1899                             error("unsupported i386 relocation (%d)", type);
1900                         }
1901                     }
1902 #elif defined(CONFIG_FORMAT_COFF)
1903                     {
1904                         char *temp_name;
1905                         int j;
1906                         EXE_SYM *sym;
1907                         temp_name = get_sym_name(symtab + *(uint32_t *)(rel->r_reloc->r_symndx));
1908                         if (!strcmp(temp_name, ".data")) {
1909                             for (j = 0, sym = symtab; j < nb_syms; j++, sym++) {
1910                                 if (strstart(sym->st_name, sym_name, NULL)) {
1911                                     addend -= sym->st_value;
1912                                 }
1913                             }
1914                         }
1915                     }
1916                     type = rel->r_type;
1917                     if (is_label) {
1918 /* TCG uses elf relocation constants */
1919 #define R_386_32        1
1920 #define R_386_PC32      2
1921                         switch(type) {
1922                         case DIR32:
1923                             type = R_386_32;
1924                             goto do_reloc;
1925                         case DISP32:
1926                             type = R_386_PC32;
1927                             addend -= 4;
1928                         do_reloc:
1929                             fprintf(outfile, "    tcg_out_reloc(s, gen_code_ptr + %d, %d, %s, %d);\n",
1930                                     reloc_offset, type, relname, addend);
1931                             break;
1932                         default:
1933                             error("unsupported i386 relocation (%d)", type);
1934                         }
1935                     } else {
1936                         switch(type) {
1937                         case DIR32:
1938                             fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
1939                                     reloc_offset, relname, addend);
1940                             break;
1941                         case DISP32:
1942                             fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d -4;\n",
1943                                     reloc_offset, relname, reloc_offset, addend);
1944                             break;
1945                         default:
1946                             error("unsupported i386 relocation (%d)", type);
1947                         }
1948                     }
1949 #else
1950 #error unsupport object format
1951 #endif
1952                 }
1953                 }
1954             }
1955 #elif defined(HOST_X86_64)
1956             {
1957                 char relname[256];
1958                 int type, is_label;
1959                 int addend;
1960                 int reloc_offset;
1961                 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1962                 if (rel->r_offset >= start_offset &&
1963                     rel->r_offset < start_offset + copy_size) {
1964                     sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
1965                     is_label = get_reloc_expr(relname, sizeof(relname), sym_name);
1966                     type = ELF32_R_TYPE(rel->r_info);
1967                     addend = rel->r_addend;
1968                     reloc_offset = rel->r_offset - start_offset;
1969                     if (is_label) {
1970                         switch(type) {
1971                         case R_X86_64_32:
1972                         case R_X86_64_32S:
1973                         case R_X86_64_PC32:
1974                             fprintf(outfile, "    tcg_out_reloc(s, gen_code_ptr + %d, %d, %s, %d);\n",
1975                                     reloc_offset, type, relname, addend);
1976                             break;
1977                         default:
1978                             error("unsupported X86_64 relocation (%d)", type);
1979                         }
1980                     } else {
1981                         switch(type) {
1982                         case R_X86_64_32:
1983                             fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = (uint32_t)%s + %d;\n",
1984                                     reloc_offset, relname, addend);
1985                             break;
1986                         case R_X86_64_32S:
1987                             fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = (int32_t)%s + %d;\n",
1988                                     reloc_offset, relname, addend);
1989                             break;
1990                         case R_X86_64_PC32:
1991                             fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d;\n",
1992                                     reloc_offset, relname, reloc_offset, addend);
1993                             break;
1994                         default:
1995                             error("unsupported X86_64 relocation (%d)", type);
1996                         }
1997                     }
1998                 }
1999                 }
2000             }
2001 #elif defined(HOST_PPC)
2002             {
2003 #ifdef CONFIG_FORMAT_ELF
2004                 char relname[256];
2005                 int type;
2006                 int addend;
2007                 int reloc_offset;
2008                 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2009                     if (rel->r_offset >= start_offset &&
2010                         rel->r_offset < start_offset + copy_size) {
2011                         sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
2012                         reloc_offset = rel->r_offset - start_offset;
2013                         if (strstart(sym_name, "__op_jmp", &p)) {
2014                             int n;
2015                             n = strtol(p, NULL, 10);
2016                             /* __op_jmp relocations are done at
2017                                runtime to do translated block
2018                                chaining: the offset of the instruction
2019                                needs to be stored */
2020                             fprintf(outfile, "    jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
2021                                     n, reloc_offset);
2022                             continue;
2023                         }
2024
2025                         get_reloc_expr(relname, sizeof(relname), sym_name);
2026                         type = ELF32_R_TYPE(rel->r_info);
2027                         addend = rel->r_addend;
2028                         switch(type) {
2029                         case R_PPC_ADDR32:
2030                             fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
2031                                     reloc_offset, relname, addend);
2032                             break;
2033                         case R_PPC_ADDR16_LO:
2034                             fprintf(outfile, "    *(uint16_t *)(gen_code_ptr + %d) = (%s + %d);\n",
2035                                     reloc_offset, relname, addend);
2036                             break;
2037                         case R_PPC_ADDR16_HI:
2038                             fprintf(outfile, "    *(uint16_t *)(gen_code_ptr + %d) = (%s + %d) >> 16;\n",
2039                                     reloc_offset, relname, addend);
2040                             break;
2041                         case R_PPC_ADDR16_HA:
2042                             fprintf(outfile, "    *(uint16_t *)(gen_code_ptr + %d) = (%s + %d + 0x8000) >> 16;\n",
2043                                     reloc_offset, relname, addend);
2044                             break;
2045                         case R_PPC_REL24:
2046                             /* warning: must be at 32 MB distancy */
2047                             fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | ((%s - (long)(gen_code_ptr + %d) + %d) & 0x03fffffc);\n",
2048                                     reloc_offset, reloc_offset, relname, reloc_offset, addend);
2049                             break;
2050                         default:
2051                             error("unsupported powerpc relocation (%d)", type);
2052                         }
2053                     }
2054                 }
2055 #elif defined(CONFIG_FORMAT_MACH)
2056                 struct scattered_relocation_info *scarel;
2057                 struct relocation_info * rel;
2058                 char final_sym_name[256];
2059                 const char *sym_name;
2060                 const char *p;
2061                 int slide, sslide;
2062                 int i;
2063
2064                 for(i = 0, rel = relocs; i < nb_relocs; i++, rel++) {
2065                     unsigned int offset, length, value = 0;
2066                     unsigned int type, pcrel, isym = 0;
2067                     unsigned int usesym = 0;
2068
2069                     if(R_SCATTERED & rel->r_address) {
2070                         scarel = (struct scattered_relocation_info*)rel;
2071                         offset = (unsigned int)scarel->r_address;
2072                         length = scarel->r_length;
2073                         pcrel = scarel->r_pcrel;
2074                         type = scarel->r_type;
2075                         value = scarel->r_value;
2076                     } else {
2077                         value = isym = rel->r_symbolnum;
2078                         usesym = (rel->r_extern);
2079                         offset = rel->r_address;
2080                         length = rel->r_length;
2081                         pcrel = rel->r_pcrel;
2082                         type = rel->r_type;
2083                     }
2084
2085                     slide = offset - start_offset;
2086
2087                     if (!(offset >= start_offset && offset < start_offset + size))
2088                         continue;  /* not in our range */
2089
2090                         sym_name = get_reloc_name(rel, &sslide);
2091
2092                         if(usesym && symtab[isym].n_type & N_STAB)
2093                             continue; /* don't handle STAB (debug sym) */
2094
2095                         if (sym_name && strstart(sym_name, "__op_jmp", &p)) {
2096                             int n;
2097                             n = strtol(p, NULL, 10);
2098                             fprintf(outfile, "    jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
2099                                     n, slide);
2100                             continue; /* Nothing more to do */
2101                         }
2102
2103                         if(!sym_name) {
2104                             fprintf(outfile, "/* #warning relocation not handled in %s (value 0x%x, %s, offset 0x%x, length 0x%x, %s, type 0x%x) */\n",
2105                                     name, value, usesym ? "use sym" : "don't use sym", offset, length, pcrel ? "pcrel":"", type);
2106                             continue; /* dunno how to handle without final_sym_name */
2107                         }
2108
2109                         get_reloc_expr(final_sym_name, sizeof(final_sym_name),
2110                                        sym_name);
2111                         switch(type) {
2112                         case PPC_RELOC_BR24:
2113                             if (!strstart(sym_name,"__op_gen_label",&p)) {
2114                                 fprintf(outfile, "{\n");
2115                                 fprintf(outfile, "    uint32_t imm = *(uint32_t *)(gen_code_ptr + %d) & 0x3fffffc;\n", slide);
2116                                 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",
2117                                         slide, slide, name, sslide);
2118                                 fprintf(outfile, "}\n");
2119                             } else {
2120                                 fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | (((long)%s - (long)gen_code_ptr - %d) & 0x03fffffc);\n",
2121                                         slide, slide, final_sym_name, slide);
2122                             }
2123                             break;
2124                         case PPC_RELOC_HI16:
2125                             fprintf(outfile, "    *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d) >> 16;\n",
2126                                     slide, final_sym_name, sslide);
2127                             break;
2128                         case PPC_RELOC_LO16:
2129                             fprintf(outfile, "    *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d);\n",
2130                                     slide, final_sym_name, sslide);
2131                             break;
2132                         case PPC_RELOC_HA16:
2133                             fprintf(outfile, "    *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d + 0x8000) >> 16;\n",
2134                                     slide, final_sym_name, sslide);
2135                             break;
2136                         default:
2137                             error("unsupported powerpc relocation (%d)", type);
2138                     }
2139                 }
2140 #else
2141 #error unsupport object format
2142 #endif
2143             }
2144 #elif defined(HOST_S390)
2145             {
2146                 char relname[256];
2147                 int type;
2148                 int addend;
2149                 int reloc_offset;
2150                 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2151                     if (rel->r_offset >= start_offset &&
2152                         rel->r_offset < start_offset + copy_size) {
2153                         sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
2154                         get_reloc_expr(relname, sizeof(relname), sym_name);
2155                         type = ELF32_R_TYPE(rel->r_info);
2156                         addend = rel->r_addend;
2157                         reloc_offset = rel->r_offset - start_offset;
2158                         switch(type) {
2159                         case R_390_32:
2160                             fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
2161                                     reloc_offset, relname, addend);
2162                             break;
2163                         case R_390_16:
2164                             fprintf(outfile, "    *(uint16_t *)(gen_code_ptr + %d) = %s + %d;\n",
2165                                     reloc_offset, relname, addend);
2166                             break;
2167                         case R_390_8:
2168                             fprintf(outfile, "    *(uint8_t *)(gen_code_ptr + %d) = %s + %d;\n",
2169                                     reloc_offset, relname, addend);
2170                             break;
2171                         case R_390_PC32DBL:
2172                             if (ELF32_ST_TYPE(symtab[ELFW(R_SYM)(rel->r_info)].st_info) == STT_SECTION) {
2173                                 fprintf(outfile,
2174                                         "    *(uint32_t *)(gen_code_ptr + %d) += "
2175                                         "((long)&%s - (long)gen_code_ptr) >> 1;\n",
2176                                         reloc_offset, name);
2177                             }
2178                             else
2179                                 fprintf(outfile,
2180                                         "    *(uint32_t *)(gen_code_ptr + %d) = "
2181                                         "(%s + %d - ((uint32_t)gen_code_ptr + %d)) >> 1;\n",
2182                                         reloc_offset, relname, addend, reloc_offset);
2183                             break;
2184                         default:
2185                             error("unsupported s390 relocation (%d)", type);
2186                         }
2187                     }
2188                 }
2189             }
2190 #elif defined(HOST_ALPHA)
2191             {
2192                 for (i = 0, rel = relocs; i < nb_relocs; i++, rel++) {
2193                     if (rel->r_offset >= start_offset && rel->r_offset < start_offset + copy_size) {
2194                         int type;
2195                         long reloc_offset;
2196
2197                         type = ELF64_R_TYPE(rel->r_info);
2198                         sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name;
2199                         reloc_offset = rel->r_offset - start_offset;
2200                         switch (type) {
2201                         case R_ALPHA_GPDISP:
2202                             /* The gp is just 32 bit, and never changes, so it's easiest to emit it
2203                                as an immediate instead of constructing it from the pv or ra.  */
2204                             fprintf(outfile, "    immediate_ldah(gen_code_ptr + %ld, gp);\n",
2205                                     reloc_offset);
2206                             fprintf(outfile, "    immediate_lda(gen_code_ptr + %ld, gp);\n",
2207                                     reloc_offset + (int)rel->r_addend);
2208                             break;
2209                         case R_ALPHA_LITUSE:
2210                             /* jsr to literal hint. Could be used to optimize to bsr. Ignore for
2211                                now, since some called functions (libc) need pv to be set up.  */
2212                             break;
2213                         case R_ALPHA_HINT:
2214                             /* Branch target prediction hint. Ignore for now.  Should be already
2215                                correct for in-function jumps.  */
2216                             break;
2217                         case R_ALPHA_LITERAL:
2218                             /* Load a literal from the GOT relative to the gp.  Since there's only a
2219                                single gp, nothing is to be done.  */
2220                             break;
2221                         case R_ALPHA_GPRELHIGH:
2222                             /* Handle fake relocations against __op_param symbol.  Need to emit the
2223                                high part of the immediate value instead.  Other symbols need no
2224                                special treatment.  */
2225                             if (strstart(sym_name, "__op_param", &p))
2226                                 fprintf(outfile, "    immediate_ldah(gen_code_ptr + %ld, param%s);\n",
2227                                         reloc_offset, p);
2228                             break;
2229                         case R_ALPHA_GPRELLOW:
2230                             if (strstart(sym_name, "__op_param", &p))
2231                                 fprintf(outfile, "    immediate_lda(gen_code_ptr + %ld, param%s);\n",
2232                                         reloc_offset, p);
2233                             break;
2234                         case R_ALPHA_BRSGP:
2235                             /* PC-relative jump. Tweak offset to skip the two instructions that try to
2236                                set up the gp from the pv.  */
2237                             fprintf(outfile, "    fix_bsr(gen_code_ptr + %ld, (uint8_t *) &%s - (gen_code_ptr + %ld + 4) + 8);\n",
2238                                     reloc_offset, sym_name, reloc_offset);
2239                             break;
2240                         default:
2241                             error("unsupported Alpha relocation (%d)", type);
2242                         }
2243                     }
2244                 }
2245             }
2246 #elif defined(HOST_IA64)
2247             {
2248                 unsigned long sym_idx;
2249                 long code_offset;
2250                 char relname[256];
2251                 int type;
2252                 long addend;
2253
2254                 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2255                     sym_idx = ELF64_R_SYM(rel->r_info);
2256                     if (rel->r_offset < start_offset
2257                         || rel->r_offset >= start_offset + copy_size)
2258                         continue;
2259                     sym_name = (strtab + symtab[sym_idx].st_name);
2260                     code_offset = rel->r_offset - start_offset;
2261                     if (strstart(sym_name, "__op_jmp", &p)) {
2262                         int n;
2263                         n = strtol(p, NULL, 10);
2264                         /* __op_jmp relocations are done at
2265                            runtime to do translated block
2266                            chaining: the offset of the instruction
2267                            needs to be stored */
2268                         fprintf(outfile, "    jmp_offsets[%d] ="
2269                                 "%ld + (gen_code_ptr - gen_code_buf);\n",
2270                                 n, code_offset);
2271                         continue;
2272                     }
2273                     get_reloc_expr(relname, sizeof(relname), sym_name);
2274                     type = ELF64_R_TYPE(rel->r_info);
2275                     addend = rel->r_addend;
2276                     switch(type) {
2277                       case R_IA64_IMM64:
2278                           fprintf(outfile,
2279                                   "    ia64_imm64(gen_code_ptr + %ld, "
2280                                   "%s + %ld);\n",
2281                                   code_offset, relname, addend);
2282                           break;
2283                       case R_IA64_LTOFF22X:
2284                       case R_IA64_LTOFF22:
2285                           fprintf(outfile, "    IA64_LTOFF(gen_code_ptr + %ld,"
2286                                   " %s + %ld, %d);\n",
2287                                   code_offset, relname, addend,
2288                                   (type == R_IA64_LTOFF22X));
2289                           break;
2290                       case R_IA64_LDXMOV:
2291                           fprintf(outfile,
2292                                   "    ia64_ldxmov(gen_code_ptr + %ld,"
2293                                   " %s + %ld);\n", code_offset, relname, addend);
2294                           break;
2295
2296                       case R_IA64_PCREL21B:
2297                           if (strstart(sym_name, "__op_gen_label", NULL)) {
2298                               fprintf(outfile,
2299                                       "    ia64_imm21b(gen_code_ptr + %ld,"
2300                                       " (long) (%s + %ld -\n\t\t"
2301                                       "((long) gen_code_ptr + %ld)) >> 4);\n",
2302                                       code_offset, relname, addend,
2303                                       code_offset & ~0xfUL);
2304                           } else {
2305                               fprintf(outfile,
2306                                       "    IA64_PLT(gen_code_ptr + %ld, "
2307                                       "%d);\t/* %s + %ld */\n",
2308                                       code_offset,
2309                                       get_plt_index(sym_name, addend),
2310                                       sym_name, addend);
2311                           }
2312                           break;
2313                       default:
2314                           error("unsupported ia64 relocation (0x%x)",
2315                                 type);
2316                     }
2317                 }
2318                 fprintf(outfile, "    ia64_nop_b(gen_code_ptr + %d);\n",
2319                         copy_size - 16 + 2);
2320             }
2321 #elif defined(HOST_SPARC)
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[ELF32_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_WDISP30:
2357                             fprintf(outfile,
2358                                     "    *(uint32_t *)(gen_code_ptr + %d) = "
2359                                     "((*(uint32_t *)(gen_code_ptr + %d)) "
2360                                     " & ~0x3fffffff) "
2361                                     " | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
2362                                     "    & 0x3fffffff);\n",
2363                                     reloc_offset, reloc_offset, relname, addend,
2364                                     reloc_offset);
2365                             break;
2366                         case R_SPARC_WDISP22:
2367                             fprintf(outfile,
2368                                     "    *(uint32_t *)(gen_code_ptr + %d) = "
2369                                     "((*(uint32_t *)(gen_code_ptr + %d)) "
2370                                     " & ~0x3fffff) "
2371                                     " | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
2372                                     "    & 0x3fffff);\n",
2373                                     rel->r_offset - start_offset,
2374                                     rel->r_offset - start_offset,
2375                                     relname, addend,
2376                                     rel->r_offset - start_offset);
2377                             break;
2378                         default:
2379                             error("unsupported sparc relocation (%d)", type);
2380                         }
2381                     }
2382                 }
2383             }
2384 #elif defined(HOST_SPARC64)
2385             {
2386                 char relname[256];
2387                 int type;
2388                 int addend;
2389                 int reloc_offset;
2390                 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2391                     if (rel->r_offset >= start_offset &&
2392                         rel->r_offset < start_offset + copy_size) {
2393                         sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name;
2394                         get_reloc_expr(relname, sizeof(relname), sym_name);
2395                         type = ELF32_R_TYPE(rel->r_info);
2396                         addend = rel->r_addend;
2397                         reloc_offset = rel->r_offset - start_offset;
2398                         switch(type) {
2399                         case R_SPARC_32:
2400                             fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
2401                                     reloc_offset, relname, addend);
2402                             break;
2403                         case R_SPARC_HI22:
2404                             fprintf(outfile,
2405                                     "    *(uint32_t *)(gen_code_ptr + %d) = "
2406                                     "((*(uint32_t *)(gen_code_ptr + %d)) "
2407                                     " & ~0x3fffff) "
2408                                     " | (((%s + %d) >> 10) & 0x3fffff);\n",
2409                                     reloc_offset, reloc_offset, relname, addend);
2410                             break;
2411                         case R_SPARC_LO10:
2412                             fprintf(outfile,
2413                                     "    *(uint32_t *)(gen_code_ptr + %d) = "
2414                                     "((*(uint32_t *)(gen_code_ptr + %d)) "
2415                                     " & ~0x3ff) "
2416                                     " | ((%s + %d) & 0x3ff);\n",
2417                                     reloc_offset, reloc_offset, relname, addend);
2418                             break;
2419                         case R_SPARC_OLO10:
2420                             addend += ELF64_R_TYPE_DATA (rel->r_info);
2421                             fprintf(outfile,
2422                                     "    *(uint32_t *)(gen_code_ptr + %d) = "
2423                                     "((*(uint32_t *)(gen_code_ptr + %d)) "
2424                                     " & ~0x3ff) "
2425                                     " | ((%s + %d) & 0x3ff);\n",
2426                                     reloc_offset, reloc_offset, relname, addend);
2427                             break;
2428                         case R_SPARC_WDISP30:
2429                             fprintf(outfile,
2430                                     "    *(uint32_t *)(gen_code_ptr + %d) = "
2431                                     "((*(uint32_t *)(gen_code_ptr + %d)) "
2432                                     " & ~0x3fffffff) "
2433                                     " | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
2434                                     "    & 0x3fffffff);\n",
2435                                     reloc_offset, reloc_offset, relname, addend,
2436                                     reloc_offset);
2437                             break;
2438                         case R_SPARC_WDISP22:
2439                             fprintf(outfile,
2440                                     "    *(uint32_t *)(gen_code_ptr + %d) = "
2441                                     "((*(uint32_t *)(gen_code_ptr + %d)) "
2442                                     " & ~0x3fffff) "
2443                                     " | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
2444                                     "    & 0x3fffff);\n",
2445                                     reloc_offset, reloc_offset, relname, addend,
2446                                     reloc_offset);
2447                             break;
2448                         case R_SPARC_HH22:
2449                             fprintf(outfile,
2450                                     "    *(uint32_t *)(gen_code_ptr + %d) = "
2451                                     "((*(uint32_t *)(gen_code_ptr + %d)) "
2452                                     " & ~0x00000000) "
2453                                     " | (((%s + %d) >> 42) & 0x00000000);\n",
2454                                     reloc_offset, reloc_offset, relname, addend);
2455                              break;
2456
2457                         case R_SPARC_LM22:
2458                             fprintf(outfile,
2459                                     "    *(uint32_t *)(gen_code_ptr + %d) = "
2460                                     "((*(uint32_t *)(gen_code_ptr + %d)) "
2461                                     " & ~0x00000000) "
2462                                     " | (((%s + %d) >> 10) & 0x00000000);\n",
2463                                     reloc_offset, reloc_offset, relname, addend);
2464                             break;
2465
2466                         case R_SPARC_HM10:
2467                             fprintf(outfile,
2468                                     "    *(uint32_t *)(gen_code_ptr + %d) = "
2469                                     "((*(uint32_t *)(gen_code_ptr + %d)) "
2470                                     " & ~0x00000000) "
2471                                     " | ((((%s + %d) >> 32 & 0x3ff)) & 0x00000000);\n",
2472                                     reloc_offset, reloc_offset, relname, addend);
2473                             break;
2474
2475                         default:
2476                             error("unsupported sparc64 relocation (%d) for symbol %s", type, relname);
2477                         }
2478                     }
2479                 }
2480             }
2481 #elif defined(HOST_ARM)
2482             {
2483                 char relname[256];
2484                 int type;
2485                 int addend;
2486                 int reloc_offset;
2487                 uint32_t insn;
2488
2489                 insn = get32((uint32_t *)(p_start + 4));
2490                 /* If prologue ends in sub sp, sp, #const then assume
2491                    op has a stack frame and needs the frame pointer.  */
2492                 if ((insn & 0xffffff00) == 0xe24dd000) {
2493                     int i;
2494                     uint32_t opcode;
2495                     opcode = 0xe28db000; /* add fp, sp, #0.  */
2496 #if 0
2497 /* ??? Need to undo the extra stack adjustment at the end of the op.
2498    For now just leave the stack misaligned and hope it doesn't break anything
2499    too important.  */
2500                     if ((insn & 4) != 0) {
2501                         /* Preserve doubleword stack alignment.  */
2502                         fprintf(outfile,
2503                                 "    *(uint32_t *)(gen_code_ptr + 4)= 0x%x;\n",
2504                                 insn + 4);
2505                         opcode -= 4;
2506                     }
2507 #endif
2508                     insn = get32((uint32_t *)(p_start - 4));
2509                     /* Calculate the size of the saved registers,
2510                        excluding pc.  */
2511                     for (i = 0; i < 15; i++) {
2512                         if (insn & (1 << i))
2513                             opcode += 4;
2514                     }
2515                     fprintf(outfile,
2516                             "    *(uint32_t *)gen_code_ptr = 0x%x;\n", opcode);
2517                 }
2518                 arm_emit_ldr_info(relname, start_offset, outfile, p_start, p_end,
2519                                   relocs, nb_relocs);
2520
2521                 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2522                 if (rel->r_offset >= start_offset &&
2523                     rel->r_offset < start_offset + copy_size) {
2524                     sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
2525                     /* the compiler leave some unnecessary references to the code */
2526                     if (sym_name[0] == '\0')
2527                         continue;
2528                     get_reloc_expr(relname, sizeof(relname), sym_name);
2529                     type = ELF32_R_TYPE(rel->r_info);
2530                     addend = get32((uint32_t *)(text + rel->r_offset));
2531                     reloc_offset = rel->r_offset - start_offset;
2532                     switch(type) {
2533                     case R_ARM_ABS32:
2534                         fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
2535                                 reloc_offset, relname, addend);
2536                         break;
2537                     case R_ARM_PC24:
2538                     case R_ARM_JUMP24:
2539                     case R_ARM_CALL:
2540                         fprintf(outfile, "    arm_reloc_pc24((uint32_t *)(gen_code_ptr + %d), 0x%x, %s);\n",
2541                                 reloc_offset, addend, relname);
2542                         break;
2543                     default:
2544                         error("unsupported arm relocation (%d)", type);
2545                     }
2546                 }
2547                 }
2548             }
2549 #elif defined(HOST_M68K)
2550             {
2551                 char relname[256];
2552                 int type;
2553                 int addend;
2554                 int reloc_offset;
2555                 Elf32_Sym *sym;
2556                 for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2557                 if (rel->r_offset >= start_offset &&
2558                     rel->r_offset < start_offset + copy_size) {
2559                     sym = &(symtab[ELFW(R_SYM)(rel->r_info)]);
2560                     sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
2561                     get_reloc_expr(relname, sizeof(relname), sym_name);
2562                     type = ELF32_R_TYPE(rel->r_info);
2563                     addend = get32((uint32_t *)(text + rel->r_offset)) + rel->r_addend;
2564                     reloc_offset = rel->r_offset - start_offset;
2565                     switch(type) {
2566                     case R_68K_32:
2567                         fprintf(outfile, "    /* R_68K_32 RELOC, offset %x */\n", rel->r_offset) ;
2568                         fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %#x;\n",
2569                                 reloc_offset, relname, addend );
2570                         break;
2571                     case R_68K_PC32:
2572                         fprintf(outfile, "    /* R_68K_PC32 RELOC, offset %x */\n", rel->r_offset);
2573                         fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %#x) + %#x;\n",
2574                                 reloc_offset, relname, reloc_offset, /*sym->st_value+*/ addend);
2575                         break;
2576                     default:
2577                         error("unsupported m68k relocation (%d)", type);
2578                     }
2579                 }
2580                 }
2581             }
2582 #elif defined(HOST_MIPS) || defined(HOST_MIPS64)
2583             {
2584                 for (i = 0, rel = relocs; i < nb_relocs; i++, rel++) {
2585                     if (rel->r_offset >= start_offset && rel->r_offset < start_offset + copy_size) {
2586                         char relname[256];
2587                         int type;
2588                         int addend;
2589                         int reloc_offset;
2590
2591                         sym_name = strtab + symtab[ELF32_R_SYM(rel->r_info)].st_name;
2592                         /* the compiler leave some unnecessary references to the code */
2593                         if (sym_name[0] == '\0')
2594                             continue;
2595                         get_reloc_expr(relname, sizeof(relname), sym_name);
2596                         type = ELF32_R_TYPE(rel->r_info);
2597                         addend = get32((uint32_t *)(text + rel->r_offset));
2598                         reloc_offset = rel->r_offset - start_offset;
2599                         switch (type) {
2600                         case R_MIPS_26:
2601                             fprintf(outfile, "    /* R_MIPS_26 RELOC, offset 0x%x, name %s */\n",
2602                                     rel->r_offset, sym_name);
2603                             fprintf(outfile,
2604                                     "    *(uint32_t *)(gen_code_ptr + 0x%x) = "
2605                                     "(0x%x & ~0x3fffff) "
2606                                     "| ((0x%x + ((%s - (*(uint32_t *)(gen_code_ptr + 0x%x))) >> 2)) "
2607                                     "   & 0x3fffff);\n",
2608                                     reloc_offset, addend, addend, relname, reloc_offset);
2609                             break;
2610                         case R_MIPS_HI16:
2611                             fprintf(outfile, "    /* R_MIPS_HI16 RELOC, offset 0x%x, name %s */\n",
2612                                     rel->r_offset, sym_name);
2613                             fprintf(outfile,
2614                                     "    *(uint32_t *)(gen_code_ptr + 0x%x) = "
2615                                     "((*(uint32_t *)(gen_code_ptr + 0x%x)) "
2616                                     " & ~0xffff) "
2617                                     " | (((%s - 0x8000) >> 16) & 0xffff);\n",
2618                                     reloc_offset, reloc_offset, relname);
2619                             break;
2620                         case R_MIPS_LO16:
2621                             fprintf(outfile, "    /* R_MIPS_LO16 RELOC, offset 0x%x, name %s */\n",
2622                                     rel->r_offset, sym_name);
2623                             fprintf(outfile,
2624                                     "    *(uint32_t *)(gen_code_ptr + 0x%x) = "
2625                                     "((*(uint32_t *)(gen_code_ptr + 0x%x)) "
2626                                     " & ~0xffff) "
2627                                     " | (%s & 0xffff);\n",
2628                                     reloc_offset, reloc_offset, relname);
2629                             break;
2630                         case R_MIPS_PC16:
2631                             fprintf(outfile, "    /* R_MIPS_PC16 RELOC, offset 0x%x, name %s */\n",
2632                                     rel->r_offset, sym_name);
2633                             fprintf(outfile,
2634                                     "    *(uint32_t *)(gen_code_ptr + 0x%x) = "
2635                                     "(0x%x & ~0xffff) "
2636                                     "| ((0x%x + ((%s - (*(uint32_t *)(gen_code_ptr + 0x%x))) >> 2)) "
2637                                     "   & 0xffff);\n",
2638                                     reloc_offset, addend, addend, relname, reloc_offset);
2639                             break;
2640                         case R_MIPS_GOT16:
2641                         case R_MIPS_CALL16:
2642                             fprintf(outfile, "    /* R_MIPS_GOT16 RELOC, offset 0x%x, name %s */\n",
2643                                     rel->r_offset, sym_name);
2644                             fprintf(outfile,
2645                                     "    *(uint32_t *)(gen_code_ptr + 0x%x) = "
2646                                     "((*(uint32_t *)(gen_code_ptr + 0x%x)) "
2647                                     " & ~0xffff) "
2648                                     " | (((%s - 0x8000) >> 16) & 0xffff);\n",
2649                                     reloc_offset, reloc_offset, relname);
2650                             break;
2651                         default:
2652                             error("unsupported MIPS relocation (%d)", type);
2653                         }
2654                     }
2655                 }
2656             }
2657 #else
2658 #error unsupported CPU
2659 #endif
2660         fprintf(outfile, "    gen_code_ptr += %d;\n", copy_size);
2661         fprintf(outfile, "}\n");
2662         fprintf(outfile, "break;\n\n");
2663     } else {
2664         fprintf(outfile, "static inline void gen_%s(", name);
2665         if (nb_args == 0) {
2666             fprintf(outfile, "void");
2667         } else {
2668             for(i = 0; i < nb_args; i++) {
2669                 if (i != 0)
2670                     fprintf(outfile, ", ");
2671                 fprintf(outfile, "long param%d", i + 1);
2672             }
2673         }
2674         fprintf(outfile, ")\n");
2675         fprintf(outfile, "{\n");
2676         for(i = 0; i < nb_args; i++) {
2677             fprintf(outfile, "    *gen_opparam_ptr++ = param%d;\n", i + 1);
2678         }
2679         fprintf(outfile, "    *gen_opc_ptr++ = INDEX_%s;\n", name);
2680         fprintf(outfile, "}\n\n");
2681     }
2682 }
2683
2684 int gen_file(FILE *outfile, int out_type)
2685 {
2686     int i;
2687     EXE_SYM *sym;
2688
2689     if (out_type == OUT_INDEX_OP) {
2690         for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
2691             const char *name;
2692             name = get_sym_name(sym);
2693             if (strstart(name, OP_PREFIX, NULL)) {
2694                 gen_code(name, sym->st_value, sym->st_size, outfile, 2);
2695             }
2696         }
2697     } else if (out_type == OUT_GEN_OP) {
2698         /* generate gen_xxx functions */
2699         for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
2700             const char *name;
2701             name = get_sym_name(sym);
2702             if (strstart(name, OP_PREFIX, NULL)) {
2703 #if defined(CONFIG_FORMAT_ELF) || defined(CONFIG_FORMAT_COFF)
2704                 if (sym->st_shndx != text_shndx)
2705                     error("invalid section for opcode (0x%x)", sym->st_shndx);
2706 #endif
2707                 gen_code(name, sym->st_value, sym->st_size, outfile, 0);
2708             }
2709         }
2710
2711     } else {
2712         /* generate big code generation switch */
2713
2714 #ifdef HOST_ARM
2715 #error broken
2716         /* We need to know the size of all the ops so we can figure out when
2717            to emit constant pools.  This must be consistent with opc.h.  */
2718 fprintf(outfile,
2719 "static const uint32_t arm_opc_size[] = {\n"
2720 "  0,\n" /* end */
2721 "  0,\n" /* nop */
2722 "  0,\n" /* nop1 */
2723 "  0,\n" /* nop2 */
2724 "  0,\n"); /* nop3 */
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                 fprintf(outfile, "  %d,\n", sym->st_size);
2730             }
2731         }
2732 fprintf(outfile,
2733 "};\n");
2734 #endif
2735
2736 #ifdef HOST_ARM
2737 #error broken
2738 /* Arm is tricky because it uses constant pools for loading immediate values.
2739    We assume (and require) each function is code followed by a constant pool.
2740    All the ops are small so this should be ok.  For each op we figure
2741    out how much "spare" range we have in the load instructions.  This allows
2742    us to insert subsequent ops in between the op and the constant pool,
2743    eliminating the neeed to jump around the pool.
2744
2745    We currently generate:
2746
2747    [ For this example we assume merging would move op1_pool out of range.
2748      In practice we should be able to combine many ops before the offset
2749      limits are reached. ]
2750    op1_code;
2751    op2_code;
2752    goto op3;
2753    op2_pool;
2754    op1_pool;
2755 op3:
2756    op3_code;
2757    ret;
2758    op3_pool;
2759
2760    Ideally we'd put op1_pool before op2_pool, but that requires two passes.
2761  */
2762 fprintf(outfile,
2763 "    uint8_t *last_gen_code_ptr = gen_code_buf;\n"
2764 "    LDREntry *arm_ldr_ptr = arm_ldr_table;\n"
2765 "    uint32_t *arm_data_ptr = arm_data_table + ARM_LDR_TABLE_SIZE;\n"
2766 /* Initialise the parmissible pool offset to an arbitary large value.  */
2767 "    uint8_t *arm_pool_ptr = gen_code_buf + 0x1000000;\n");
2768 #endif
2769 #ifdef HOST_IA64
2770 #error broken
2771     {
2772         long addend, not_first = 0;
2773         unsigned long sym_idx;
2774         int index, max_index;
2775         const char *sym_name;
2776         EXE_RELOC *rel;
2777
2778         max_index = -1;
2779         for (i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2780             sym_idx = ELF64_R_SYM(rel->r_info);
2781             sym_name = (strtab + symtab[sym_idx].st_name);
2782             if (strstart(sym_name, "__op_gen_label", NULL))
2783                 continue;
2784             if (ELF64_R_TYPE(rel->r_info) != R_IA64_PCREL21B)
2785                 continue;
2786
2787             addend = rel->r_addend;
2788             index = get_plt_index(sym_name, addend);
2789             if (index <= max_index)
2790                 continue;
2791             max_index = index;
2792             fprintf(outfile, "    extern void %s(void);\n", sym_name);
2793         }
2794
2795         fprintf(outfile,
2796                 "    struct ia64_fixup *plt_fixes = NULL, "
2797                 "*ltoff_fixes = NULL;\n"
2798                 "    static long plt_target[] = {\n\t");
2799
2800         max_index = -1;
2801         for (i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2802             sym_idx = ELF64_R_SYM(rel->r_info);
2803             sym_name = (strtab + symtab[sym_idx].st_name);
2804             if (strstart(sym_name, "__op_gen_label", NULL))
2805                 continue;
2806             if (ELF64_R_TYPE(rel->r_info) != R_IA64_PCREL21B)
2807                 continue;
2808
2809             addend = rel->r_addend;
2810             index = get_plt_index(sym_name, addend);
2811             if (index <= max_index)
2812                 continue;
2813             max_index = index;
2814
2815             if (not_first)
2816                 fprintf(outfile, ",\n\t");
2817             not_first = 1;
2818             if (addend)
2819                 fprintf(outfile, "(long) &%s + %ld", sym_name, addend);
2820             else
2821                 fprintf(outfile, "(long) &%s", sym_name);
2822         }
2823         fprintf(outfile, "\n    };\n"
2824             "    unsigned int plt_offset[%u] = { 0 };\n", max_index + 1);
2825     }
2826 #endif
2827
2828 #ifdef HOST_ARM
2829 #error broken
2830 /* Generate constant pool if needed */
2831 fprintf(outfile,
2832 "            if (gen_code_ptr + arm_opc_size[*opc_ptr] >= arm_pool_ptr) {\n"
2833 "                gen_code_ptr = arm_flush_ldr(gen_code_ptr, arm_ldr_table, "
2834 "arm_ldr_ptr, arm_data_ptr, arm_data_table + ARM_LDR_TABLE_SIZE, 1);\n"
2835 "                last_gen_code_ptr = gen_code_ptr;\n"
2836 "                arm_ldr_ptr = arm_ldr_table;\n"
2837 "                arm_data_ptr = arm_data_table + ARM_LDR_TABLE_SIZE;\n"
2838 "                arm_pool_ptr = gen_code_ptr + 0x1000000;\n"
2839 "            }\n");
2840 #endif
2841
2842         for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
2843             const char *name;
2844             name = get_sym_name(sym);
2845             if (strstart(name, OP_PREFIX, NULL)) {
2846 #if 0
2847                 printf("%4d: %s pos=0x%08x len=%d\n",
2848                        i, name, sym->st_value, sym->st_size);
2849 #endif
2850 #if defined(CONFIG_FORMAT_ELF) || defined(CONFIG_FORMAT_COFF)
2851                 if (sym->st_shndx != text_shndx)
2852                     error("invalid section for opcode (0x%x)", sym->st_shndx);
2853 #endif
2854                 gen_code(name, sym->st_value, sym->st_size, outfile, 1);
2855             }
2856         }
2857     }
2858
2859     return 0;
2860 }
2861
2862 void usage(void)
2863 {
2864     printf("dyngen (c) 2003 Fabrice Bellard\n"
2865            "usage: dyngen [-o outfile] [-c] objfile\n"
2866            "Generate a dynamic code generator from an object file\n"
2867            "-c     output enum of operations\n"
2868            "-g     output gen_op_xx() functions\n"
2869            );
2870     exit(1);
2871 }
2872
2873 int main(int argc, char **argv)
2874 {
2875     int c, out_type;
2876     const char *filename, *outfilename;
2877     FILE *outfile;
2878
2879     outfilename = "out.c";
2880     out_type = OUT_CODE;
2881     for(;;) {
2882         c = getopt(argc, argv, "ho:cg");
2883         if (c == -1)
2884             break;
2885         switch(c) {
2886         case 'h':
2887             usage();
2888             break;
2889         case 'o':
2890             outfilename = optarg;
2891             break;
2892         case 'c':
2893             out_type = OUT_INDEX_OP;
2894             break;
2895         case 'g':
2896             out_type = OUT_GEN_OP;
2897             break;
2898         }
2899     }
2900     if (optind >= argc)
2901         usage();
2902     filename = argv[optind];
2903     outfile = fopen(outfilename, "w");
2904     if (!outfile)
2905         error("could not open '%s'", outfilename);
2906
2907     load_object(filename);
2908     gen_file(outfile, out_type);
2909     fclose(outfile);
2910     return 0;
2911 }