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1
/*
2
 *  Generic Dynamic compiler generator
3
 * 
4
 *  Copyright (c) 2003 Fabrice Bellard
5
 *
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 *  The COFF object format support was extracted from Kazu's QEMU port
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 *  to Win32.
8
 *
9
 *  Mach-O Support by Matt Reda and Pierre d'Herbemont
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 *
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
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 *  the Free Software Foundation; either version 2 of the License, or
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 *  (at your option) any later version.
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 *
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 *  This program is distributed in the hope that it will be useful,
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 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 *  GNU General Public License for more details.
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 *
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 *  You should have received a copy of the GNU General Public License
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 *  along with this program; if not, write to the Free Software
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 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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 */
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
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#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
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#define elf_check_arch(x) ((x) == EM_S390)
76
#define ELF_USES_RELOCA
77

    
78
#elif defined(HOST_ALPHA)
79

    
80
#define ELF_CLASS        ELFCLASS64
81
#define ELF_ARCH        EM_ALPHA
82
#define elf_check_arch(x) ((x) == EM_ALPHA)
83
#define ELF_USES_RELOCA
84

    
85
#elif defined(HOST_IA64)
86

    
87
#define ELF_CLASS        ELFCLASS64
88
#define ELF_ARCH        EM_IA_64
89
#define elf_check_arch(x) ((x) == EM_IA_64)
90
#define ELF_USES_RELOCA
91

    
92
#elif defined(HOST_SPARC)
93

    
94
#define ELF_CLASS        ELFCLASS32
95
#define ELF_ARCH        EM_SPARC
96
#define elf_check_arch(x) ((x) == EM_SPARC || (x) == EM_SPARC32PLUS)
97
#define ELF_USES_RELOCA
98

    
99
#elif defined(HOST_SPARC64)
100

    
101
#define ELF_CLASS        ELFCLASS64
102
#define ELF_ARCH        EM_SPARCV9
103
#define elf_check_arch(x) ((x) == EM_SPARCV9)
104
#define ELF_USES_RELOCA
105

    
106
#elif defined(HOST_ARM)
107

    
108
#define ELF_CLASS        ELFCLASS32
109
#define ELF_ARCH        EM_ARM
110
#define elf_check_arch(x) ((x) == EM_ARM)
111
#define ELF_USES_RELOC
112

    
113
#elif defined(HOST_M68K)
114

    
115
#define ELF_CLASS        ELFCLASS32
116
#define ELF_ARCH        EM_68K
117
#define elf_check_arch(x) ((x) == EM_68K)
118
#define ELF_USES_RELOCA
119

    
120
#else
121
#error unsupported CPU - please update the code
122
#endif
123

    
124
#include "elf.h"
125

    
126
#if ELF_CLASS == ELFCLASS32
127
typedef int32_t host_long;
128
typedef uint32_t host_ulong;
129
#define swabls(x) swab32s(x)
130
#else
131
typedef int64_t host_long;
132
typedef uint64_t host_ulong;
133
#define swabls(x) swab64s(x)
134
#endif
135

    
136
#ifdef ELF_USES_RELOCA
137
#define SHT_RELOC SHT_RELA
138
#else
139
#define SHT_RELOC SHT_REL
140
#endif
141

    
142
#define EXE_RELOC ELF_RELOC
143
#define EXE_SYM ElfW(Sym)
144

    
145
#endif /* CONFIG_FORMAT_ELF */
146

    
147
#ifdef CONFIG_FORMAT_COFF
148

    
149
#include "a.out.h"
150

    
151
typedef int32_t host_long;
152
typedef uint32_t host_ulong;
153

    
154
#define FILENAMELEN 256
155

    
156
typedef struct coff_sym {
157
    struct external_syment *st_syment;
158
    char st_name[FILENAMELEN];
159
    uint32_t st_value;
160
    int  st_size;
161
    uint8_t st_type;
162
    uint8_t st_shndx;
163
} coff_Sym;
164

    
165
typedef struct coff_rel {
166
    struct external_reloc *r_reloc;
167
    int  r_offset;
168
    uint8_t r_type;
169
} coff_Rel;
170

    
171
#define EXE_RELOC struct coff_rel
172
#define EXE_SYM struct coff_sym
173

    
174
#endif /* CONFIG_FORMAT_COFF */
175

    
176
#ifdef CONFIG_FORMAT_MACH
177

    
178
#include <mach-o/loader.h>
179
#include <mach-o/nlist.h>
180
#include <mach-o/reloc.h>
181
#include <mach-o/ppc/reloc.h>
182

    
183
# define check_mach_header(x) (x.magic == MH_MAGIC)
184
typedef int32_t host_long;
185
typedef uint32_t host_ulong;
186

    
187
struct nlist_extended
188
{
189
   union {
190
   char *n_name; 
191
   long  n_strx; 
192
   } n_un;
193
   unsigned char n_type; 
194
   unsigned char n_sect; 
195
   short st_desc;
196
   unsigned long st_value;
197
   unsigned long st_size;
198
};
199

    
200
#define EXE_RELOC struct relocation_info
201
#define EXE_SYM struct nlist_extended
202

    
203
#endif /* CONFIG_FORMAT_MACH */
204

    
205
#include "bswap.h"
206

    
207
enum {
208
    OUT_GEN_OP,
209
    OUT_CODE,
210
    OUT_INDEX_OP,
211
};
212

    
213
/* all dynamically generated functions begin with this code */
214
#define OP_PREFIX "op_"
215

    
216
int do_swap;
217

    
218
void __attribute__((noreturn)) __attribute__((format (printf, 1, 2))) error(const char *fmt, ...)
219
{
220
    va_list ap;
221
    va_start(ap, fmt);
222
    fprintf(stderr, "dyngen: ");
223
    vfprintf(stderr, fmt, ap);
224
    fprintf(stderr, "\n");
225
    va_end(ap);
226
    exit(1);
227
}
228

    
229
void *load_data(int fd, long offset, unsigned int size)
230
{
231
    char *data;
232

    
233
    data = malloc(size);
234
    if (!data)
235
        return NULL;
236
    lseek(fd, offset, SEEK_SET);
237
    if (read(fd, data, size) != size) {
238
        free(data);
239
        return NULL;
240
    }
241
    return data;
242
}
243

    
244
int strstart(const char *str, const char *val, const char **ptr)
245
{
246
    const char *p, *q;
247
    p = str;
248
    q = val;
249
    while (*q != '\0') {
250
        if (*p != *q)
251
            return 0;
252
        p++;
253
        q++;
254
    }
255
    if (ptr)
256
        *ptr = p;
257
    return 1;
258
}
259

    
260
void pstrcpy(char *buf, int buf_size, const char *str)
261
{
262
    int c;
263
    char *q = buf;
264

    
265
    if (buf_size <= 0)
266
        return;
267

    
268
    for(;;) {
269
        c = *str++;
270
        if (c == 0 || q >= buf + buf_size - 1)
271
            break;
272
        *q++ = c;
273
    }
274
    *q = '\0';
275
}
276

    
277
void swab16s(uint16_t *p)
278
{
279
    *p = bswap16(*p);
280
}
281

    
282
void swab32s(uint32_t *p)
283
{
284
    *p = bswap32(*p);
285
}
286

    
287
void swab64s(uint64_t *p)
288
{
289
    *p = bswap64(*p);
290
}
291

    
292
uint16_t get16(uint16_t *p)
293
{
294
    uint16_t val;
295
    val = *p;
296
    if (do_swap)
297
        val = bswap16(val);
298
    return val;
299
}
300

    
301
uint32_t get32(uint32_t *p)
302
{
303
    uint32_t val;
304
    val = *p;
305
    if (do_swap)
306
        val = bswap32(val);
307
    return val;
308
}
309

    
310
void put16(uint16_t *p, uint16_t val)
311
{
312
    if (do_swap)
313
        val = bswap16(val);
314
    *p = val;
315
}
316

    
317
void put32(uint32_t *p, uint32_t val)
318
{
319
    if (do_swap)
320
        val = bswap32(val);
321
    *p = val;
322
}
323

    
324
/* executable information */
325
EXE_SYM *symtab;
326
int nb_syms;
327
int text_shndx;
328
uint8_t *text;
329
EXE_RELOC *relocs;
330
int nb_relocs;
331

    
332
#ifdef CONFIG_FORMAT_ELF
333

    
334
/* ELF file info */
335
struct elf_shdr *shdr;
336
uint8_t **sdata;
337
struct elfhdr ehdr;
338
char *strtab;
339

    
340
int elf_must_swap(struct elfhdr *h)
341
{
342
  union {
343
      uint32_t i;
344
      uint8_t b[4];
345
  } swaptest;
346

    
347
  swaptest.i = 1;
348
  return (h->e_ident[EI_DATA] == ELFDATA2MSB) != 
349
      (swaptest.b[0] == 0);
350
}
351
  
352
void elf_swap_ehdr(struct elfhdr *h)
353
{
354
    swab16s(&h->e_type);                        /* Object file type */
355
    swab16s(&h->        e_machine);                /* Architecture */
356
    swab32s(&h->        e_version);                /* Object file version */
357
    swabls(&h->        e_entry);                /* Entry point virtual address */
358
    swabls(&h->        e_phoff);                /* Program header table file offset */
359
    swabls(&h->        e_shoff);                /* Section header table file offset */
360
    swab32s(&h->        e_flags);                /* Processor-specific flags */
361
    swab16s(&h->        e_ehsize);                /* ELF header size in bytes */
362
    swab16s(&h->        e_phentsize);                /* Program header table entry size */
363
    swab16s(&h->        e_phnum);                /* Program header table entry count */
364
    swab16s(&h->        e_shentsize);                /* Section header table entry size */
365
    swab16s(&h->        e_shnum);                /* Section header table entry count */
366
    swab16s(&h->        e_shstrndx);                /* Section header string table index */
367
}
368

    
369
void elf_swap_shdr(struct elf_shdr *h)
370
{
371
  swab32s(&h->        sh_name);                /* Section name (string tbl index) */
372
  swab32s(&h->        sh_type);                /* Section type */
373
  swabls(&h->        sh_flags);                /* Section flags */
374
  swabls(&h->        sh_addr);                /* Section virtual addr at execution */
375
  swabls(&h->        sh_offset);                /* Section file offset */
376
  swabls(&h->        sh_size);                /* Section size in bytes */
377
  swab32s(&h->        sh_link);                /* Link to another section */
378
  swab32s(&h->        sh_info);                /* Additional section information */
379
  swabls(&h->        sh_addralign);                /* Section alignment */
380
  swabls(&h->        sh_entsize);                /* Entry size if section holds table */
381
}
382

    
383
void elf_swap_phdr(struct elf_phdr *h)
384
{
385
    swab32s(&h->p_type);                        /* Segment type */
386
    swabls(&h->p_offset);                /* Segment file offset */
387
    swabls(&h->p_vaddr);                /* Segment virtual address */
388
    swabls(&h->p_paddr);                /* Segment physical address */
389
    swabls(&h->p_filesz);                /* Segment size in file */
390
    swabls(&h->p_memsz);                /* Segment size in memory */
391
    swab32s(&h->p_flags);                /* Segment flags */
392
    swabls(&h->p_align);                /* Segment alignment */
393
}
394

    
395
void elf_swap_rel(ELF_RELOC *rel)
396
{
397
    swabls(&rel->r_offset);
398
    swabls(&rel->r_info);
399
#ifdef ELF_USES_RELOCA
400
    swabls(&rel->r_addend);
401
#endif
402
}
403

    
404
struct elf_shdr *find_elf_section(struct elf_shdr *shdr, int shnum, const char *shstr, 
405
                                  const char *name)
406
{
407
    int i;
408
    const char *shname;
409
    struct elf_shdr *sec;
410

    
411
    for(i = 0; i < shnum; i++) {
412
        sec = &shdr[i];
413
        if (!sec->sh_name)
414
            continue;
415
        shname = shstr + sec->sh_name;
416
        if (!strcmp(shname, name))
417
            return sec;
418
    }
419
    return NULL;
420
}
421

    
422
int find_reloc(int sh_index)
423
{
424
    struct elf_shdr *sec;
425
    int i;
426

    
427
    for(i = 0; i < ehdr.e_shnum; i++) {
428
        sec = &shdr[i];
429
        if (sec->sh_type == SHT_RELOC && sec->sh_info == sh_index) 
430
            return i;
431
    }
432
    return 0;
433
}
434

    
435
static host_ulong get_rel_offset(EXE_RELOC *rel)
436
{
437
    return rel->r_offset;
438
}
439

    
440
static char *get_rel_sym_name(EXE_RELOC *rel)
441
{
442
    return strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
443
}
444

    
445
static char *get_sym_name(EXE_SYM *sym)
446
{
447
    return strtab + sym->st_name;
448
}
449

    
450
/* load an elf object file */
451
int load_object(const char *filename)
452
{
453
    int fd;
454
    struct elf_shdr *sec, *symtab_sec, *strtab_sec, *text_sec;
455
    int i, j;
456
    ElfW(Sym) *sym;
457
    char *shstr;
458
    ELF_RELOC *rel;
459
    
460
    fd = open(filename, O_RDONLY);
461
    if (fd < 0) 
462
        error("can't open file '%s'", filename);
463
    
464
    /* Read ELF header.  */
465
    if (read(fd, &ehdr, sizeof (ehdr)) != sizeof (ehdr))
466
        error("unable to read file header");
467

    
468
    /* Check ELF identification.  */
469
    if (ehdr.e_ident[EI_MAG0] != ELFMAG0
470
     || ehdr.e_ident[EI_MAG1] != ELFMAG1
471
     || ehdr.e_ident[EI_MAG2] != ELFMAG2
472
     || ehdr.e_ident[EI_MAG3] != ELFMAG3
473
     || ehdr.e_ident[EI_VERSION] != EV_CURRENT) {
474
        error("bad ELF header");
475
    }
476

    
477
    do_swap = elf_must_swap(&ehdr);
478
    if (do_swap)
479
        elf_swap_ehdr(&ehdr);
480
    if (ehdr.e_ident[EI_CLASS] != ELF_CLASS)
481
        error("Unsupported ELF class");
482
    if (ehdr.e_type != ET_REL)
483
        error("ELF object file expected");
484
    if (ehdr.e_version != EV_CURRENT)
485
        error("Invalid ELF version");
486
    if (!elf_check_arch(ehdr.e_machine))
487
        error("Unsupported CPU (e_machine=%d)", ehdr.e_machine);
488

    
489
    /* read section headers */
490
    shdr = load_data(fd, ehdr.e_shoff, ehdr.e_shnum * sizeof(struct elf_shdr));
491
    if (do_swap) {
492
        for(i = 0; i < ehdr.e_shnum; i++) {
493
            elf_swap_shdr(&shdr[i]);
494
        }
495
    }
496

    
497
    /* read all section data */
498
    sdata = malloc(sizeof(void *) * ehdr.e_shnum);
499
    memset(sdata, 0, sizeof(void *) * ehdr.e_shnum);
500
    
501
    for(i = 0;i < ehdr.e_shnum; i++) {
502
        sec = &shdr[i];
503
        if (sec->sh_type != SHT_NOBITS)
504
            sdata[i] = load_data(fd, sec->sh_offset, sec->sh_size);
505
    }
506

    
507
    sec = &shdr[ehdr.e_shstrndx];
508
    shstr = sdata[ehdr.e_shstrndx];
509

    
510
    /* swap relocations */
511
    for(i = 0; i < ehdr.e_shnum; i++) {
512
        sec = &shdr[i];
513
        if (sec->sh_type == SHT_RELOC) {
514
            nb_relocs = sec->sh_size / sec->sh_entsize;
515
            if (do_swap) {
516
                for(j = 0, rel = (ELF_RELOC *)sdata[i]; j < nb_relocs; j++, rel++)
517
                    elf_swap_rel(rel);
518
            }
519
        }
520
    }
521
    /* text section */
522

    
523
    text_sec = find_elf_section(shdr, ehdr.e_shnum, shstr, ".text");
524
    if (!text_sec)
525
        error("could not find .text section");
526
    text_shndx = text_sec - shdr;
527
    text = sdata[text_shndx];
528

    
529
    /* find text relocations, if any */
530
    relocs = NULL;
531
    nb_relocs = 0;
532
    i = find_reloc(text_shndx);
533
    if (i != 0) {
534
        relocs = (ELF_RELOC *)sdata[i];
535
        nb_relocs = shdr[i].sh_size / shdr[i].sh_entsize;
536
    }
537

    
538
    symtab_sec = find_elf_section(shdr, ehdr.e_shnum, shstr, ".symtab");
539
    if (!symtab_sec)
540
        error("could not find .symtab section");
541
    strtab_sec = &shdr[symtab_sec->sh_link];
542

    
543
    symtab = (ElfW(Sym) *)sdata[symtab_sec - shdr];
544
    strtab = sdata[symtab_sec->sh_link];
545
    
546
    nb_syms = symtab_sec->sh_size / sizeof(ElfW(Sym));
547
    if (do_swap) {
548
        for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
549
            swab32s(&sym->st_name);
550
            swabls(&sym->st_value);
551
            swabls(&sym->st_size);
552
            swab16s(&sym->st_shndx);
553
        }
554
    }
555
    close(fd);
556
    return 0;
557
}
558

    
559
#endif /* CONFIG_FORMAT_ELF */
560

    
561
#ifdef CONFIG_FORMAT_COFF
562

    
563
/* COFF file info */
564
struct external_scnhdr *shdr;
565
uint8_t **sdata;
566
struct external_filehdr fhdr;
567
struct external_syment *coff_symtab;
568
char *strtab;
569
int coff_text_shndx, coff_data_shndx;
570

    
571
int data_shndx;
572

    
573
#define STRTAB_SIZE 4
574

    
575
#define DIR32   0x06
576
#define DISP32  0x14
577

    
578
#define T_FUNCTION  0x20
579
#define C_EXTERNAL  2
580

    
581
void sym_ent_name(struct external_syment *ext_sym, EXE_SYM *sym)
582
{
583
    char *q;
584
    int c, i, len;
585
    
586
    if (ext_sym->e.e.e_zeroes != 0) {
587
        q = sym->st_name;
588
        for(i = 0; i < 8; i++) {
589
            c = ext_sym->e.e_name[i];
590
            if (c == '\0')
591
                break;
592
            *q++ = c;
593
        }
594
        *q = '\0';
595
    } else {
596
        pstrcpy(sym->st_name, sizeof(sym->st_name), strtab + ext_sym->e.e.e_offset);
597
    }
598

    
599
    /* now convert the name to a C name (suppress the leading '_') */
600
    if (sym->st_name[0] == '_') {
601
        len = strlen(sym->st_name);
602
        memmove(sym->st_name, sym->st_name + 1, len - 1);
603
        sym->st_name[len - 1] = '\0';
604
    }
605
}
606

    
607
char *name_for_dotdata(struct coff_rel *rel)
608
{
609
        int i;
610
        struct coff_sym *sym;
611
        uint32_t text_data;
612

    
613
        text_data = *(uint32_t *)(text + rel->r_offset);
614

    
615
        for (i = 0, sym = symtab; i < nb_syms; i++, sym++) {
616
                if (sym->st_syment->e_scnum == data_shndx &&
617
                    text_data >= sym->st_value &&
618
                    text_data < sym->st_value + sym->st_size) {
619
                    
620
                    return sym->st_name;
621

    
622
                }
623
        }
624
        return NULL;
625
}
626

    
627
static char *get_sym_name(EXE_SYM *sym)
628
{
629
    return sym->st_name;
630
}
631

    
632
static char *get_rel_sym_name(EXE_RELOC *rel)
633
{
634
    char *name;
635
    name = get_sym_name(symtab + *(uint32_t *)(rel->r_reloc->r_symndx));
636
    if (!strcmp(name, ".data"))
637
        name = name_for_dotdata(rel);
638
    return name;
639
}
640

    
641
static host_ulong get_rel_offset(EXE_RELOC *rel)
642
{
643
    return rel->r_offset;
644
}
645

    
646
struct external_scnhdr *find_coff_section(struct external_scnhdr *shdr, int shnum, const char *name)
647
{
648
    int i;
649
    const char *shname;
650
    struct external_scnhdr *sec;
651

    
652
    for(i = 0; i < shnum; i++) {
653
        sec = &shdr[i];
654
        if (!sec->s_name)
655
            continue;
656
        shname = sec->s_name;
657
        if (!strcmp(shname, name))
658
            return sec;
659
    }
660
    return NULL;
661
}
662

    
663
/* load a coff object file */
664
int load_object(const char *filename)
665
{
666
    int fd;
667
    struct external_scnhdr *sec, *text_sec, *data_sec;
668
    int i;
669
    struct external_syment *ext_sym;
670
    struct external_reloc *coff_relocs;
671
    struct external_reloc *ext_rel;
672
    uint32_t *n_strtab;
673
    EXE_SYM *sym;
674
    EXE_RELOC *rel;
675
        
676
    fd = open(filename, O_RDONLY 
677
#ifdef _WIN32
678
              | O_BINARY
679
#endif
680
              );
681
    if (fd < 0) 
682
        error("can't open file '%s'", filename);
683
    
684
    /* Read COFF header.  */
685
    if (read(fd, &fhdr, sizeof (fhdr)) != sizeof (fhdr))
686
        error("unable to read file header");
687

    
688
    /* Check COFF identification.  */
689
    if (fhdr.f_magic != I386MAGIC) {
690
        error("bad COFF header");
691
    }
692
    do_swap = 0;
693

    
694
    /* read section headers */
695
    shdr = load_data(fd, sizeof(struct external_filehdr) + fhdr.f_opthdr, fhdr.f_nscns * sizeof(struct external_scnhdr));
696
        
697
    /* read all section data */
698
    sdata = malloc(sizeof(void *) * fhdr.f_nscns);
699
    memset(sdata, 0, sizeof(void *) * fhdr.f_nscns);
700
    
701
    const char *p;
702
    for(i = 0;i < fhdr.f_nscns; i++) {
703
        sec = &shdr[i];
704
        if (!strstart(sec->s_name,  ".bss", &p))
705
            sdata[i] = load_data(fd, sec->s_scnptr, sec->s_size);
706
    }
707

    
708

    
709
    /* text section */
710
    text_sec = find_coff_section(shdr, fhdr.f_nscns, ".text");
711
    if (!text_sec)
712
        error("could not find .text section");
713
    coff_text_shndx = text_sec - shdr;
714
    text = sdata[coff_text_shndx];
715

    
716
    /* data section */
717
    data_sec = find_coff_section(shdr, fhdr.f_nscns, ".data");
718
    if (!data_sec)
719
        error("could not find .data section");
720
    coff_data_shndx = data_sec - shdr;
721
    
722
    coff_symtab = load_data(fd, fhdr.f_symptr, fhdr.f_nsyms*SYMESZ);
723
    for (i = 0, ext_sym = coff_symtab; i < nb_syms; i++, ext_sym++) {
724
        for(i=0;i<8;i++)
725
            printf(" %02x", ((uint8_t *)ext_sym->e.e_name)[i]);
726
        printf("\n");
727
    }
728

    
729

    
730
    n_strtab = load_data(fd, (fhdr.f_symptr + fhdr.f_nsyms*SYMESZ), STRTAB_SIZE);
731
    strtab = load_data(fd, (fhdr.f_symptr + fhdr.f_nsyms*SYMESZ), *n_strtab); 
732
    
733
    nb_syms = fhdr.f_nsyms;
734

    
735
    for (i = 0, ext_sym = coff_symtab; i < nb_syms; i++, ext_sym++) {
736
      if (strstart(ext_sym->e.e_name, ".text", NULL))
737
                  text_shndx = ext_sym->e_scnum;
738
          if (strstart(ext_sym->e.e_name, ".data", NULL))
739
                  data_shndx = ext_sym->e_scnum;
740
    }
741

    
742
        /* set coff symbol */
743
        symtab = malloc(sizeof(struct coff_sym) * nb_syms);
744

    
745
        int aux_size, j;
746
        for (i = 0, ext_sym = coff_symtab, sym = symtab; i < nb_syms; i++, ext_sym++, sym++) {
747
                memset(sym, 0, sizeof(*sym));
748
                sym->st_syment = ext_sym;
749
                sym_ent_name(ext_sym, sym);
750
                sym->st_value = ext_sym->e_value;
751

    
752
                aux_size = *(int8_t *)ext_sym->e_numaux;
753
                if (ext_sym->e_scnum == text_shndx && ext_sym->e_type == T_FUNCTION) {
754
                        for (j = aux_size + 1; j < nb_syms - i; j++) {
755
                                if ((ext_sym + j)->e_scnum == text_shndx &&
756
                                        (ext_sym + j)->e_type == T_FUNCTION ){
757
                                        sym->st_size = (ext_sym + j)->e_value - ext_sym->e_value;
758
                                        break;
759
                                } else if (j == nb_syms - i - 1) {
760
                                        sec = &shdr[coff_text_shndx];
761
                                        sym->st_size = sec->s_size - ext_sym->e_value;
762
                                        break;
763
                                }
764
                        }
765
                } else if (ext_sym->e_scnum == data_shndx && *(uint8_t *)ext_sym->e_sclass == C_EXTERNAL) {
766
                        for (j = aux_size + 1; j < nb_syms - i; j++) {
767
                                if ((ext_sym + j)->e_scnum == data_shndx) {
768
                                        sym->st_size = (ext_sym + j)->e_value - ext_sym->e_value;
769
                                        break;
770
                                } else if (j == nb_syms - i - 1) {
771
                                        sec = &shdr[coff_data_shndx];
772
                                        sym->st_size = sec->s_size - ext_sym->e_value;
773
                                        break;
774
                                }
775
                        }
776
                } else {
777
                        sym->st_size = 0;
778
                }
779
                
780
                sym->st_type = ext_sym->e_type;
781
                sym->st_shndx = ext_sym->e_scnum;
782
        }
783

    
784
                
785
    /* find text relocations, if any */
786
    sec = &shdr[coff_text_shndx];
787
    coff_relocs = load_data(fd, sec->s_relptr, sec->s_nreloc*RELSZ);
788
    nb_relocs = sec->s_nreloc;
789

    
790
    /* set coff relocation */
791
    relocs = malloc(sizeof(struct coff_rel) * nb_relocs);
792
    for (i = 0, ext_rel = coff_relocs, rel = relocs; i < nb_relocs; 
793
         i++, ext_rel++, rel++) {
794
        memset(rel, 0, sizeof(*rel));
795
        rel->r_reloc = ext_rel;
796
        rel->r_offset = *(uint32_t *)ext_rel->r_vaddr;
797
        rel->r_type = *(uint16_t *)ext_rel->r_type;
798
    }
799
    return 0;
800
}
801

    
802
#endif /* CONFIG_FORMAT_COFF */
803

    
804
#ifdef CONFIG_FORMAT_MACH
805

    
806
/* File Header */
807
struct mach_header         mach_hdr;
808

    
809
/* commands */
810
struct segment_command         *segment = 0;
811
struct dysymtab_command *dysymtabcmd = 0;
812
struct symtab_command         *symtabcmd = 0;
813

    
814
/* section */
815
struct section         *section_hdr;
816
struct section *text_sec_hdr;
817
uint8_t         **sdata;
818

    
819
/* relocs */
820
struct relocation_info *relocs;
821
        
822
/* symbols */
823
EXE_SYM                        *symtab;
824
struct nlist         *symtab_std;
825
char                        *strtab;
826

    
827
/* indirect symbols */
828
uint32_t         *tocdylib;
829

    
830
/* Utility functions */
831

    
832
static inline char *find_str_by_index(int index)
833
{
834
    return strtab+index;
835
}
836

    
837
/* Used by dyngen common code */
838
static char *get_sym_name(EXE_SYM *sym)
839
{
840
        char *name = find_str_by_index(sym->n_un.n_strx);
841
        
842
        if ( sym->n_type & N_STAB ) /* Debug symbols are ignored */
843
                return "debug";
844
                        
845
        if(!name)
846
                return name;
847
        if(name[0]=='_')
848
                return name + 1;
849
        else
850
                return name;
851
}
852

    
853
/* find a section index given its segname, sectname */
854
static int find_mach_sec_index(struct section *section_hdr, int shnum, const char *segname, 
855
                                  const char *sectname)
856
{
857
    int i;
858
    struct section *sec = section_hdr;
859

    
860
    for(i = 0; i < shnum; i++, sec++) {
861
        if (!sec->segname || !sec->sectname)
862
            continue;
863
        if (!strcmp(sec->sectname, sectname) && !strcmp(sec->segname, segname))
864
            return i;
865
    }
866
    return -1;
867
}
868

    
869
/* find a section header given its segname, sectname */
870
struct section *find_mach_sec_hdr(struct section *section_hdr, int shnum, const char *segname, 
871
                                  const char *sectname)
872
{
873
    int index = find_mach_sec_index(section_hdr, shnum, segname, sectname);
874
        if(index == -1)
875
                return NULL;
876
        return section_hdr+index;
877
}
878

    
879

    
880
static inline void fetch_next_pair_value(struct relocation_info * rel, unsigned int *value)
881
{
882
    struct scattered_relocation_info * scarel;
883
        
884
    if(R_SCATTERED & rel->r_address) {
885
        scarel = (struct scattered_relocation_info*)rel;
886
        if(scarel->r_type != PPC_RELOC_PAIR)
887
            error("fetch_next_pair_value: looking for a pair which was not found (1)");
888
        *value = scarel->r_value;
889
    } else {
890
                if(rel->r_type != PPC_RELOC_PAIR)
891
                        error("fetch_next_pair_value: looking for a pair which was not found (2)");
892
                *value = rel->r_address;
893
        }
894
}
895

    
896
/* find a sym name given its value, in a section number */
897
static const char * find_sym_with_value_and_sec_number( int value, int sectnum, int * offset )
898
{
899
        int i, ret = -1;
900
        
901
        for( i = 0 ; i < nb_syms; i++ )
902
        {
903
            if( !(symtab[i].n_type & N_STAB) && (symtab[i].n_type & N_SECT) &&
904
                         (symtab[i].n_sect ==  sectnum) && (symtab[i].st_value <= value) )
905
                {
906
                        if( (ret<0) || (symtab[i].st_value >= symtab[ret].st_value) )
907
                                ret = i;
908
                }
909
        }
910
        if( ret < 0 ) {
911
                *offset = 0;
912
                return 0;
913
        } else {
914
                *offset = value - symtab[ret].st_value;
915
                return get_sym_name(&symtab[ret]);
916
        }
917
}
918

    
919
/* 
920
 *  Find symbol name given a (virtual) address, and a section which is of type 
921
 *  S_NON_LAZY_SYMBOL_POINTERS or S_LAZY_SYMBOL_POINTERS or S_SYMBOL_STUBS
922
 */
923
static const char * find_reloc_name_in_sec_ptr(int address, struct section * sec_hdr)
924
{
925
    unsigned int tocindex, symindex, size;
926
    const char *name = 0;
927
    
928
    /* Sanity check */
929
    if(!( address >= sec_hdr->addr && address < (sec_hdr->addr + sec_hdr->size) ) )
930
        return (char*)0;
931
                
932
        if( sec_hdr->flags & S_SYMBOL_STUBS ){
933
                size = sec_hdr->reserved2;
934
                if(size == 0)
935
                    error("size = 0");
936
                
937
        }
938
        else if( sec_hdr->flags & S_LAZY_SYMBOL_POINTERS ||
939
                    sec_hdr->flags & S_NON_LAZY_SYMBOL_POINTERS)
940
                size = sizeof(unsigned long);
941
        else
942
                return 0;
943
                
944
    /* Compute our index in toc */
945
        tocindex = (address - sec_hdr->addr)/size;
946
        symindex = tocdylib[sec_hdr->reserved1 + tocindex];
947
        
948
        name = get_sym_name(&symtab[symindex]);
949

    
950
    return name;
951
}
952

    
953
static const char * find_reloc_name_given_its_address(int address)
954
{
955
    unsigned int i;
956
    for(i = 0; i < segment->nsects ; i++)
957
    {
958
        const char * name = find_reloc_name_in_sec_ptr(address, &section_hdr[i]);
959
        if((long)name != -1)
960
            return name;
961
    }
962
    return 0;
963
}
964

    
965
static const char * get_reloc_name(EXE_RELOC * rel, int * sslide)
966
{
967
        char * name = 0;
968
        struct scattered_relocation_info * sca_rel = (struct scattered_relocation_info*)rel;
969
        int sectnum = rel->r_symbolnum;
970
        int sectoffset;
971
        int other_half=0;
972
        
973
        /* init the slide value */
974
        *sslide = 0;
975
        
976
        if(R_SCATTERED & rel->r_address)
977
                return (char *)find_reloc_name_given_its_address(sca_rel->r_value);
978

    
979
        if(rel->r_extern)
980
        {
981
                /* ignore debug sym */
982
                if ( symtab[rel->r_symbolnum].n_type & N_STAB ) 
983
                        return 0;
984
                return get_sym_name(&symtab[rel->r_symbolnum]);
985
        }
986

    
987
        /* Intruction contains an offset to the symbols pointed to, in the rel->r_symbolnum section */
988
        sectoffset = *(uint32_t *)(text + rel->r_address) & 0xffff;
989
                        
990
        if(sectnum==0xffffff)
991
                return 0;
992

    
993
        /* Sanity Check */
994
        if(sectnum > segment->nsects)
995
                error("sectnum > segment->nsects");
996

    
997
        switch(rel->r_type)
998
        {
999
                case PPC_RELOC_LO16: fetch_next_pair_value(rel+1, &other_half); sectoffset |= (other_half << 16);
1000
                        break;
1001
                case PPC_RELOC_HI16: fetch_next_pair_value(rel+1, &other_half); sectoffset = (sectoffset << 16) | (uint16_t)(other_half & 0xffff);
1002
                        break;
1003
                case PPC_RELOC_HA16: fetch_next_pair_value(rel+1, &other_half); sectoffset = (sectoffset << 16) + (int16_t)(other_half & 0xffff);
1004
                        break;
1005
                case PPC_RELOC_BR24:
1006
                        sectoffset = ( *(uint32_t *)(text + rel->r_address) & 0x03fffffc );
1007
                        if (sectoffset & 0x02000000) sectoffset |= 0xfc000000;
1008
                        break;
1009
                default:
1010
                        error("switch(rel->type) not found");
1011
        }
1012

    
1013
        if(rel->r_pcrel)
1014
                sectoffset += rel->r_address;
1015
                        
1016
        if (rel->r_type == PPC_RELOC_BR24)
1017
                name = (char *)find_reloc_name_in_sec_ptr((int)sectoffset, &section_hdr[sectnum-1]);
1018

    
1019
        /* search it in the full symbol list, if not found */
1020
        if(!name)
1021
                name = (char *)find_sym_with_value_and_sec_number(sectoffset, sectnum, sslide);
1022
        
1023
        return name;
1024
}
1025

    
1026
/* Used by dyngen common code */
1027
static const char * get_rel_sym_name(EXE_RELOC * rel)
1028
{
1029
        int sslide;
1030
        return get_reloc_name( rel, &sslide);
1031
}
1032

    
1033
/* Used by dyngen common code */
1034
static host_ulong get_rel_offset(EXE_RELOC *rel)
1035
{
1036
        struct scattered_relocation_info * sca_rel = (struct scattered_relocation_info*)rel;
1037
    if(R_SCATTERED & rel->r_address)
1038
                return sca_rel->r_address;
1039
        else
1040
                return rel->r_address;
1041
}
1042

    
1043
/* load a mach-o object file */
1044
int load_object(const char *filename)
1045
{
1046
        int fd;
1047
        unsigned int offset_to_segment = 0;
1048
    unsigned int offset_to_dysymtab = 0;
1049
    unsigned int offset_to_symtab = 0;
1050
    struct load_command lc;
1051
    unsigned int i, j;
1052
        EXE_SYM *sym;
1053
        struct nlist *syment;
1054
    
1055
        fd = open(filename, O_RDONLY);
1056
    if (fd < 0) 
1057
        error("can't open file '%s'", filename);
1058
                
1059
    /* Read Mach header.  */
1060
    if (read(fd, &mach_hdr, sizeof (mach_hdr)) != sizeof (mach_hdr))
1061
        error("unable to read file header");
1062

    
1063
    /* Check Mach identification.  */
1064
    if (!check_mach_header(mach_hdr)) {
1065
        error("bad Mach header");
1066
    }
1067
    
1068
    if (mach_hdr.cputype != CPU_TYPE_POWERPC)
1069
        error("Unsupported CPU");
1070
        
1071
    if (mach_hdr.filetype != MH_OBJECT)
1072
        error("Unsupported Mach Object");
1073
    
1074
    /* read segment headers */
1075
    for(i=0, j=sizeof(mach_hdr); i<mach_hdr.ncmds ; i++)
1076
    {
1077
        if(read(fd, &lc, sizeof(struct load_command)) != sizeof(struct load_command))
1078
            error("unable to read load_command");
1079
        if(lc.cmd == LC_SEGMENT)
1080
        {
1081
            offset_to_segment = j;
1082
            lseek(fd, offset_to_segment, SEEK_SET);
1083
            segment = malloc(sizeof(struct segment_command));
1084
            if(read(fd, segment, sizeof(struct segment_command)) != sizeof(struct segment_command))
1085
                error("unable to read LC_SEGMENT");
1086
        }
1087
        if(lc.cmd == LC_DYSYMTAB)
1088
        {
1089
            offset_to_dysymtab = j;
1090
            lseek(fd, offset_to_dysymtab, SEEK_SET);
1091
            dysymtabcmd = malloc(sizeof(struct dysymtab_command));
1092
            if(read(fd, dysymtabcmd, sizeof(struct dysymtab_command)) != sizeof(struct dysymtab_command))
1093
                error("unable to read LC_DYSYMTAB");
1094
        }
1095
        if(lc.cmd == LC_SYMTAB)
1096
        {
1097
            offset_to_symtab = j;
1098
            lseek(fd, offset_to_symtab, SEEK_SET);
1099
            symtabcmd = malloc(sizeof(struct symtab_command));
1100
            if(read(fd, symtabcmd, sizeof(struct symtab_command)) != sizeof(struct symtab_command))
1101
                error("unable to read LC_SYMTAB");
1102
        }
1103
        j+=lc.cmdsize;
1104

    
1105
        lseek(fd, j, SEEK_SET);
1106
    }
1107

    
1108
    if(!segment)
1109
        error("unable to find LC_SEGMENT");
1110

    
1111
    /* read section headers */
1112
    section_hdr = load_data(fd, offset_to_segment + sizeof(struct segment_command), segment->nsects * sizeof(struct section));
1113

    
1114
    /* read all section data */
1115
    sdata = (uint8_t **)malloc(sizeof(void *) * segment->nsects);
1116
    memset(sdata, 0, sizeof(void *) * segment->nsects);
1117
    
1118
        /* Load the data in section data */
1119
        for(i = 0; i < segment->nsects; i++) {
1120
        sdata[i] = load_data(fd, section_hdr[i].offset, section_hdr[i].size);
1121
    }
1122
        
1123
    /* text section */
1124
        text_sec_hdr = find_mach_sec_hdr(section_hdr, segment->nsects, SEG_TEXT, SECT_TEXT);
1125
        i = find_mach_sec_index(section_hdr, segment->nsects, SEG_TEXT, SECT_TEXT);
1126
        if (i == -1 || !text_sec_hdr)
1127
        error("could not find __TEXT,__text section");
1128
    text = sdata[i];
1129
        
1130
    /* Make sure dysym was loaded */
1131
    if(!(int)dysymtabcmd)
1132
        error("could not find __DYSYMTAB segment");
1133
    
1134
    /* read the table of content of the indirect sym */
1135
    tocdylib = load_data( fd, dysymtabcmd->indirectsymoff, dysymtabcmd->nindirectsyms * sizeof(uint32_t) );
1136
    
1137
    /* Make sure symtab was loaded  */
1138
    if(!(int)symtabcmd)
1139
        error("could not find __SYMTAB segment");
1140
    nb_syms = symtabcmd->nsyms;
1141

    
1142
    symtab_std = load_data(fd, symtabcmd->symoff, symtabcmd->nsyms * sizeof(struct nlist));
1143
    strtab = load_data(fd, symtabcmd->stroff, symtabcmd->strsize);
1144
        
1145
        symtab = malloc(sizeof(EXE_SYM) * nb_syms);
1146
        
1147
        /* Now transform the symtab, to an extended version, with the sym size, and the C name */
1148
        for(i = 0, sym = symtab, syment = symtab_std; i < nb_syms; i++, sym++, syment++) {
1149
        struct nlist *sym_follow, *sym_next = 0;
1150
        unsigned int j;
1151
                memset(sym, 0, sizeof(*sym));
1152
                
1153
                if ( syment->n_type & N_STAB ) /* Debug symbols are skipped */
1154
            continue;
1155
                        
1156
                memcpy(sym, syment, sizeof(*syment));
1157
                        
1158
                /* Find the following symbol in order to get the current symbol size */
1159
        for(j = 0, sym_follow = symtab_std; j < nb_syms; j++, sym_follow++) {
1160
            if ( sym_follow->n_sect != 1 || sym_follow->n_type & N_STAB || !(sym_follow->n_value > sym->st_value))
1161
                continue;
1162
            if(!sym_next) {
1163
                sym_next = sym_follow;
1164
                continue;
1165
            }
1166
            if(!(sym_next->n_value > sym_follow->n_value))
1167
                continue;
1168
            sym_next = sym_follow;
1169
        }
1170
                if(sym_next)
1171
            sym->st_size = sym_next->n_value - sym->st_value;
1172
                else
1173
            sym->st_size = text_sec_hdr->size - sym->st_value;
1174
        }
1175
        
1176
    /* Find Reloc */
1177
    relocs = load_data(fd, text_sec_hdr->reloff, text_sec_hdr->nreloc * sizeof(struct relocation_info));
1178
    nb_relocs = text_sec_hdr->nreloc;
1179

    
1180
        close(fd);
1181
        return 0;
1182
}
1183

    
1184
#endif /* CONFIG_FORMAT_MACH */
1185

    
1186
void get_reloc_expr(char *name, int name_size, const char *sym_name)
1187
{
1188
    const char *p;
1189

    
1190
    if (strstart(sym_name, "__op_param", &p)) {
1191
        snprintf(name, name_size, "param%s", p);
1192
    } else if (strstart(sym_name, "__op_gen_label", &p)) {
1193
        snprintf(name, name_size, "gen_labels[param%s]", p);
1194
    } else {
1195
#ifdef HOST_SPARC
1196
        if (sym_name[0] == '.')
1197
            snprintf(name, sizeof(name),
1198
                     "(long)(&__dot_%s)",
1199
                     sym_name + 1);
1200
        else
1201
#endif
1202
            snprintf(name, name_size, "(long)(&%s)", sym_name);
1203
    }
1204
}
1205

    
1206
#ifdef HOST_IA64
1207

    
1208
#define PLT_ENTRY_SIZE        16        /* 1 bundle containing "brl" */
1209

    
1210
struct plt_entry {
1211
    struct plt_entry *next;
1212
    const char *name;
1213
    unsigned long addend;
1214
} *plt_list;
1215

    
1216
static int
1217
get_plt_index (const char *name, unsigned long addend)
1218
{
1219
    struct plt_entry *plt, *prev= NULL;
1220
    int index = 0;
1221

    
1222
    /* see if we already have an entry for this target: */
1223
    for (plt = plt_list; plt; ++index, prev = plt, plt = plt->next)
1224
        if (strcmp(plt->name, name) == 0 && plt->addend == addend)
1225
            return index;
1226

    
1227
    /* nope; create a new PLT entry: */
1228

    
1229
    plt = malloc(sizeof(*plt));
1230
    if (!plt) {
1231
        perror("malloc");
1232
        exit(1);
1233
    }
1234
    memset(plt, 0, sizeof(*plt));
1235
    plt->name = strdup(name);
1236
    plt->addend = addend;
1237

    
1238
    /* append to plt-list: */
1239
    if (prev)
1240
        prev->next = plt;
1241
    else
1242
        plt_list = plt;
1243
    return index;
1244
}
1245

    
1246
#endif
1247

    
1248
#ifdef HOST_ARM
1249

    
1250
int arm_emit_ldr_info(const char *name, unsigned long start_offset,
1251
                      FILE *outfile, uint8_t *p_start, uint8_t *p_end,
1252
                      ELF_RELOC *relocs, int nb_relocs)
1253
{
1254
    uint8_t *p;
1255
    uint32_t insn;
1256
    int offset, min_offset, pc_offset, data_size;
1257
    uint8_t data_allocated[1024];
1258
    unsigned int data_index;
1259
    
1260
    memset(data_allocated, 0, sizeof(data_allocated));
1261
    
1262
    p = p_start;
1263
    min_offset = p_end - p_start;
1264
    while (p < p_start + min_offset) {
1265
        insn = get32((uint32_t *)p);
1266
        if ((insn & 0x0d5f0000) == 0x051f0000) {
1267
            /* ldr reg, [pc, #im] */
1268
            offset = insn & 0xfff;
1269
            if (!(insn & 0x00800000))
1270
                        offset = -offset;
1271
            if ((offset & 3) !=0)
1272
                error("%s:%04x: ldr pc offset must be 32 bit aligned", 
1273
                      name, start_offset + p - p_start);
1274
            pc_offset = p - p_start + offset + 8;
1275
            if (pc_offset <= (p - p_start) || 
1276
                pc_offset >= (p_end - p_start))
1277
                error("%s:%04x: ldr pc offset must point inside the function code", 
1278
                      name, start_offset + p - p_start);
1279
            if (pc_offset < min_offset)
1280
                min_offset = pc_offset;
1281
            if (outfile) {
1282
                /* ldr position */
1283
                fprintf(outfile, "    arm_ldr_ptr->ptr = gen_code_ptr + %d;\n", 
1284
                        p - p_start);
1285
                /* ldr data index */
1286
                data_index = ((p_end - p_start) - pc_offset - 4) >> 2;
1287
                fprintf(outfile, "    arm_ldr_ptr->data_ptr = arm_data_ptr + %d;\n", 
1288
                        data_index);
1289
                fprintf(outfile, "    arm_ldr_ptr++;\n");
1290
                if (data_index >= sizeof(data_allocated))
1291
                    error("%s: too many data", name);
1292
                if (!data_allocated[data_index]) {
1293
                    ELF_RELOC *rel;
1294
                    int i, addend, type;
1295
                    const char *sym_name, *p;
1296
                    char relname[1024];
1297

    
1298
                    data_allocated[data_index] = 1;
1299

    
1300
                    /* data value */
1301
                    addend = get32((uint32_t *)(p_start + pc_offset));
1302
                    relname[0] = '\0';
1303
                    for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1304
                        if (rel->r_offset == (pc_offset + start_offset)) {
1305
                            sym_name = get_rel_sym_name(rel);
1306
                            /* the compiler leave some unnecessary references to the code */
1307
                            get_reloc_expr(relname, sizeof(relname), sym_name);
1308
                            type = ELF32_R_TYPE(rel->r_info);
1309
                            if (type != R_ARM_ABS32)
1310
                                error("%s: unsupported data relocation", name);
1311
                            break;
1312
                        }
1313
                    }
1314
                    fprintf(outfile, "    arm_data_ptr[%d] = 0x%x",
1315
                            data_index, addend);
1316
                    if (relname[0] != '\0')
1317
                        fprintf(outfile, " + %s", relname);
1318
                    fprintf(outfile, ";\n");
1319
                }
1320
            }
1321
        }
1322
        p += 4;
1323
    }
1324
    data_size = (p_end - p_start) - min_offset;
1325
    if (data_size > 0 && outfile) {
1326
        fprintf(outfile, "    arm_data_ptr += %d;\n", data_size >> 2);
1327
    }
1328

    
1329
    /* the last instruction must be a mov pc, lr */
1330
    if (p == p_start)
1331
        goto arm_ret_error;
1332
    p -= 4;
1333
    insn = get32((uint32_t *)p);
1334
    if ((insn & 0xffff0000) != 0xe91b0000) {
1335
    arm_ret_error:
1336
        if (!outfile)
1337
            printf("%s: invalid epilog\n", name);
1338
    }
1339
    return p - p_start;            
1340
}
1341
#endif
1342

    
1343

    
1344
#define MAX_ARGS 3
1345

    
1346
/* generate op code */
1347
void gen_code(const char *name, host_ulong offset, host_ulong size, 
1348
              FILE *outfile, int gen_switch)
1349
{
1350
    int copy_size = 0;
1351
    uint8_t *p_start, *p_end;
1352
    host_ulong start_offset;
1353
    int nb_args, i, n;
1354
    uint8_t args_present[MAX_ARGS];
1355
    const char *sym_name, *p;
1356
    EXE_RELOC *rel;
1357

    
1358
    /* Compute exact size excluding prologue and epilogue instructions.
1359
     * Increment start_offset to skip epilogue instructions, then compute
1360
     * copy_size the indicate the size of the remaining instructions (in
1361
     * bytes).
1362
     */
1363
    p_start = text + offset;
1364
    p_end = p_start + size;
1365
    start_offset = offset;
1366
#if defined(HOST_I386) || defined(HOST_X86_64)
1367
#ifdef CONFIG_FORMAT_COFF
1368
    {
1369
        uint8_t *p;
1370
        p = p_end - 1;
1371
        if (p == p_start)
1372
            error("empty code for %s", name);
1373
        while (*p != 0xc3) {
1374
            p--;
1375
            if (p <= p_start)
1376
                error("ret or jmp expected at the end of %s", name);
1377
        }
1378
        copy_size = p - p_start;
1379
    }
1380
#else
1381
    {
1382
        int len;
1383
        len = p_end - p_start;
1384
        if (len == 0)
1385
            error("empty code for %s", name);
1386
        if (p_end[-1] == 0xc3) {
1387
            len--;
1388
        } else {
1389
            error("ret or jmp expected at the end of %s", name);
1390
        }
1391
        copy_size = len;
1392
    }
1393
#endif    
1394
#elif defined(HOST_PPC)
1395
    {
1396
        uint8_t *p;
1397
        p = (void *)(p_end - 4);
1398
        if (p == p_start)
1399
            error("empty code for %s", name);
1400
        if (get32((uint32_t *)p) != 0x4e800020)
1401
            error("blr expected at the end of %s", name);
1402
        copy_size = p - p_start;
1403
    }
1404
#elif defined(HOST_S390)
1405
    {
1406
        uint8_t *p;
1407
        p = (void *)(p_end - 2);
1408
        if (p == p_start)
1409
            error("empty code for %s", name);
1410
        if (get16((uint16_t *)p) != 0x07fe && get16((uint16_t *)p) != 0x07f4)
1411
            error("br %%r14 expected at the end of %s", name);
1412
        copy_size = p - p_start;
1413
    }
1414
#elif defined(HOST_ALPHA)
1415
    {
1416
        uint8_t *p;
1417
        p = p_end - 4;
1418
#if 0
1419
        /* XXX: check why it occurs */
1420
        if (p == p_start)
1421
            error("empty code for %s", name);
1422
#endif
1423
        if (get32((uint32_t *)p) != 0x6bfa8001)
1424
            error("ret expected at the end of %s", name);
1425
        copy_size = p - p_start;            
1426
    }
1427
#elif defined(HOST_IA64)
1428
    {
1429
        uint8_t *p;
1430
        p = (void *)(p_end - 4);
1431
        if (p == p_start)
1432
            error("empty code for %s", name);
1433
        /* br.ret.sptk.many b0;; */
1434
        /* 08 00 84 00 */
1435
        if (get32((uint32_t *)p) != 0x00840008)
1436
            error("br.ret.sptk.many b0;; expected at the end of %s", name);
1437
        copy_size = p_end - p_start;
1438
    }
1439
#elif defined(HOST_SPARC)
1440
    {
1441
        uint32_t start_insn, end_insn1, end_insn2;
1442
        uint8_t *p;
1443
        p = (void *)(p_end - 8);
1444
        if (p <= p_start)
1445
            error("empty code for %s", name);
1446
        start_insn = get32((uint32_t *)(p_start + 0x0));
1447
        end_insn1 = get32((uint32_t *)(p + 0x0));
1448
        end_insn2 = get32((uint32_t *)(p + 0x4));
1449
        if ((start_insn & ~0x1fff) == 0x9de3a000) {
1450
            p_start += 0x4;
1451
            start_offset += 0x4;
1452
            if ((int)(start_insn | ~0x1fff) < -128)
1453
                error("Found bogus save at the start of %s", name);
1454
            if (end_insn1 != 0x81c7e008 || end_insn2 != 0x81e80000)
1455
                error("ret; restore; not found at end of %s", name);
1456
        } else {
1457
            error("No save at the beginning of %s", name);
1458
        }
1459
#if 0
1460
        /* Skip a preceeding nop, if present.  */
1461
        if (p > p_start) {
1462
            skip_insn = get32((uint32_t *)(p - 0x4));
1463
            if (skip_insn == 0x01000000)
1464
                p -= 4;
1465
        }
1466
#endif
1467
        copy_size = p - p_start;
1468
    }
1469
#elif defined(HOST_SPARC64)
1470
    {
1471
        uint32_t start_insn, end_insn1, end_insn2, skip_insn;
1472
        uint8_t *p;
1473
        p = (void *)(p_end - 8);
1474
        if (p <= p_start)
1475
            error("empty code for %s", name);
1476
        start_insn = get32((uint32_t *)(p_start + 0x0));
1477
        end_insn1 = get32((uint32_t *)(p + 0x0));
1478
        end_insn2 = get32((uint32_t *)(p + 0x4));
1479
        if ((start_insn & ~0x1fff) == 0x9de3a000) {
1480
            p_start += 0x4;
1481
            start_offset += 0x4;
1482
            if ((int)(start_insn | ~0x1fff) < -256)
1483
                error("Found bogus save at the start of %s", name);
1484
            if (end_insn1 != 0x81c7e008 || end_insn2 != 0x81e80000)
1485
                error("ret; restore; not found at end of %s", name);
1486
        } else {
1487
            error("No save at the beginning of %s", name);
1488
        }
1489
        
1490
        /* Skip a preceeding nop, if present.  */
1491
        if (p > p_start) {
1492
            skip_insn = get32((uint32_t *)(p - 0x4));
1493
            if (skip_insn == 0x01000000)
1494
                p -= 4;
1495
        }
1496
        
1497
        copy_size = p - p_start;
1498
    }
1499
#elif defined(HOST_ARM)
1500
    {
1501
        if ((p_end - p_start) <= 16)
1502
            error("%s: function too small", name);
1503
        if (get32((uint32_t *)p_start) != 0xe1a0c00d ||
1504
            (get32((uint32_t *)(p_start + 4)) & 0xffff0000) != 0xe92d0000 ||
1505
            get32((uint32_t *)(p_start + 8)) != 0xe24cb004)
1506
            error("%s: invalid prolog", name);
1507
        p_start += 12;
1508
        start_offset += 12;
1509
        copy_size = arm_emit_ldr_info(name, start_offset, NULL, p_start, p_end, 
1510
                                      relocs, nb_relocs);
1511
    }
1512
#elif defined(HOST_M68K)
1513
    {
1514
        uint8_t *p;
1515
        p = (void *)(p_end - 2);
1516
        if (p == p_start)
1517
            error("empty code for %s", name);
1518
        // remove NOP's, probably added for alignment
1519
        while ((get16((uint16_t *)p) == 0x4e71) &&
1520
               (p>p_start)) 
1521
            p -= 2;
1522
        if (get16((uint16_t *)p) != 0x4e75)
1523
            error("rts expected at the end of %s", name);
1524
        copy_size = p - p_start;
1525
    }
1526
#else
1527
#error unsupported CPU
1528
#endif
1529

    
1530
    /* compute the number of arguments by looking at the relocations */
1531
    for(i = 0;i < MAX_ARGS; i++)
1532
        args_present[i] = 0;
1533

    
1534
    for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1535
        host_ulong offset = get_rel_offset(rel);
1536
        if (offset >= start_offset &&
1537
            offset < start_offset + (p_end - p_start)) {
1538
            sym_name = get_rel_sym_name(rel);
1539
            if(!sym_name)
1540
                continue;
1541
            if (strstart(sym_name, "__op_param", &p) ||
1542
                strstart(sym_name, "__op_gen_label", &p)) {
1543
                n = strtoul(p, NULL, 10);
1544
                if (n > MAX_ARGS)
1545
                    error("too many arguments in %s", name);
1546
                args_present[n - 1] = 1;
1547
            }
1548
        }
1549
    }
1550
    
1551
    nb_args = 0;
1552
    while (nb_args < MAX_ARGS && args_present[nb_args])
1553
        nb_args++;
1554
    for(i = nb_args; i < MAX_ARGS; i++) {
1555
        if (args_present[i])
1556
            error("inconsistent argument numbering in %s", name);
1557
    }
1558

    
1559
    if (gen_switch == 2) {
1560
        fprintf(outfile, "DEF(%s, %d, %d)\n", name + 3, nb_args, copy_size);
1561
    } else if (gen_switch == 1) {
1562

    
1563
        /* output C code */
1564
        fprintf(outfile, "case INDEX_%s: {\n", name);
1565
        if (nb_args > 0) {
1566
            fprintf(outfile, "    long ");
1567
            for(i = 0; i < nb_args; i++) {
1568
                if (i != 0)
1569
                    fprintf(outfile, ", ");
1570
                fprintf(outfile, "param%d", i + 1);
1571
            }
1572
            fprintf(outfile, ";\n");
1573
        }
1574
#if defined(HOST_IA64)
1575
        fprintf(outfile, "    extern char %s;\n", name);
1576
#else
1577
        fprintf(outfile, "    extern void %s();\n", name);
1578
#endif
1579

    
1580
        for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1581
            host_ulong offset = get_rel_offset(rel);
1582
            if (offset >= start_offset &&
1583
                offset < start_offset + (p_end - p_start)) {
1584
                sym_name = get_rel_sym_name(rel);
1585
                if(!sym_name)
1586
                    continue;
1587
                if (*sym_name && 
1588
                    !strstart(sym_name, "__op_param", NULL) &&
1589
                    !strstart(sym_name, "__op_jmp", NULL) &&
1590
                    !strstart(sym_name, "__op_gen_label", NULL)) {
1591
#if defined(HOST_SPARC)
1592
                    if (sym_name[0] == '.') {
1593
                        fprintf(outfile,
1594
                                "extern char __dot_%s __asm__(\"%s\");\n",
1595
                                sym_name+1, sym_name);
1596
                        continue;
1597
                    }
1598
#endif
1599
#if defined(__APPLE__)
1600
/* set __attribute((unused)) on darwin because we wan't to avoid warning when we don't use the symbol */
1601
                    fprintf(outfile, "extern char %s __attribute__((unused));\n", sym_name);
1602
#elif defined(HOST_IA64)
1603
                        if (ELF64_R_TYPE(rel->r_info) != R_IA64_PCREL21B)
1604
                                /*
1605
                                 * PCREL21 br.call targets generally
1606
                                 * are out of range and need to go
1607
                                 * through an "import stub".
1608
                                 */
1609
                                fprintf(outfile, "    extern char %s;\n",
1610
                                        sym_name);
1611
#else
1612
                    fprintf(outfile, "extern char %s;\n", sym_name);
1613
#endif
1614
                }
1615
            }
1616
        }
1617

    
1618
        fprintf(outfile, "    memcpy(gen_code_ptr, (void *)((char *)&%s+%d), %d);\n",
1619
                                        name, (int)(start_offset - offset), copy_size);
1620

    
1621
        /* emit code offset information */
1622
        {
1623
            EXE_SYM *sym;
1624
            const char *sym_name, *p;
1625
            unsigned long val;
1626
            int n;
1627

    
1628
            for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
1629
                sym_name = get_sym_name(sym);
1630
                if (strstart(sym_name, "__op_label", &p)) {
1631
                    uint8_t *ptr;
1632
                    unsigned long offset;
1633
                    
1634
                    /* test if the variable refers to a label inside
1635
                       the code we are generating */
1636
#ifdef CONFIG_FORMAT_COFF
1637
                    if (sym->st_shndx == text_shndx) {
1638
                        ptr = sdata[coff_text_shndx];
1639
                    } else if (sym->st_shndx == data_shndx) {
1640
                        ptr = sdata[coff_data_shndx];
1641
                    } else {
1642
                        ptr = NULL;
1643
                    }
1644
#elif defined(CONFIG_FORMAT_MACH)
1645
                    if(!sym->n_sect)
1646
                        continue;
1647
                    ptr = sdata[sym->n_sect-1];
1648
#else
1649
                    ptr = sdata[sym->st_shndx];
1650
#endif
1651
                    if (!ptr)
1652
                        error("__op_labelN in invalid section");
1653
                    offset = sym->st_value;
1654
#ifdef CONFIG_FORMAT_MACH
1655
                    offset -= section_hdr[sym->n_sect-1].addr;
1656
#endif
1657
                    val = *(unsigned long *)(ptr + offset);
1658
#ifdef ELF_USES_RELOCA
1659
                    {
1660
                        int reloc_shndx, nb_relocs1, j;
1661

    
1662
                        /* try to find a matching relocation */
1663
                        reloc_shndx = find_reloc(sym->st_shndx);
1664
                        if (reloc_shndx) {
1665
                            nb_relocs1 = shdr[reloc_shndx].sh_size / 
1666
                                shdr[reloc_shndx].sh_entsize;
1667
                            rel = (ELF_RELOC *)sdata[reloc_shndx];
1668
                            for(j = 0; j < nb_relocs1; j++) {
1669
                                if (rel->r_offset == offset) {
1670
                                    val = rel->r_addend;
1671
                                    break;
1672
                                }
1673
                                rel++;
1674
                            }
1675
                        }
1676
                    }
1677
#endif                    
1678
                    if (val >= start_offset && val <= start_offset + copy_size) {
1679
                        n = strtol(p, NULL, 10);
1680
                        fprintf(outfile, "    label_offsets[%d] = %ld + (gen_code_ptr - gen_code_buf);\n", n, val - start_offset);
1681
                    }
1682
                }
1683
            }
1684
        }
1685

    
1686
        /* load parameres in variables */
1687
        for(i = 0; i < nb_args; i++) {
1688
            fprintf(outfile, "    param%d = *opparam_ptr++;\n", i + 1);
1689
        }
1690

    
1691
        /* patch relocations */
1692
#if defined(HOST_I386)
1693
            {
1694
                char name[256];
1695
                int type;
1696
                int addend;
1697
                for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1698
                if (rel->r_offset >= start_offset &&
1699
                    rel->r_offset < start_offset + copy_size) {
1700
                    sym_name = get_rel_sym_name(rel);
1701
                    if (strstart(sym_name, "__op_jmp", &p)) {
1702
                        int n;
1703
                        n = strtol(p, NULL, 10);
1704
                        /* __op_jmp relocations are done at
1705
                           runtime to do translated block
1706
                           chaining: the offset of the instruction
1707
                           needs to be stored */
1708
                        fprintf(outfile, "    jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
1709
                                n, rel->r_offset - start_offset);
1710
                        continue;
1711
                    }
1712
                        
1713
                    get_reloc_expr(name, sizeof(name), sym_name);
1714
                    addend = get32((uint32_t *)(text + rel->r_offset));
1715
#ifdef CONFIG_FORMAT_ELF
1716
                    type = ELF32_R_TYPE(rel->r_info);
1717
                    switch(type) {
1718
                    case R_386_32:
1719
                        fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n", 
1720
                                rel->r_offset - start_offset, name, addend);
1721
                        break;
1722
                    case R_386_PC32:
1723
                        fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d;\n", 
1724
                                rel->r_offset - start_offset, name, rel->r_offset - start_offset, addend);
1725
                        break;
1726
                    default:
1727
                        error("unsupported i386 relocation (%d)", type);
1728
                    }
1729
#elif defined(CONFIG_FORMAT_COFF)
1730
                    {
1731
                        char *temp_name;
1732
                        int j;
1733
                        EXE_SYM *sym;
1734
                        temp_name = get_sym_name(symtab + *(uint32_t *)(rel->r_reloc->r_symndx));
1735
                        if (!strcmp(temp_name, ".data")) {
1736
                            for (j = 0, sym = symtab; j < nb_syms; j++, sym++) {
1737
                                if (strstart(sym->st_name, sym_name, NULL)) {
1738
                                    addend -= sym->st_value;
1739
                                }
1740
                            }
1741
                        }
1742
                    }
1743
                    type = rel->r_type;
1744
                    switch(type) {
1745
                    case DIR32:
1746
                        fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n", 
1747
                                rel->r_offset - start_offset, name, addend);
1748
                        break;
1749
                    case DISP32:
1750
                        fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d -4;\n", 
1751
                                rel->r_offset - start_offset, name, rel->r_offset - start_offset, addend);
1752
                        break;
1753
                    default:
1754
                        error("unsupported i386 relocation (%d)", type);
1755
                    }
1756
#else
1757
#error unsupport object format
1758
#endif
1759
                }
1760
                }
1761
            }
1762
#elif defined(HOST_X86_64)
1763
            {
1764
                char name[256];
1765
                int type;
1766
                int addend;
1767
                for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1768
                if (rel->r_offset >= start_offset &&
1769
                    rel->r_offset < start_offset + copy_size) {
1770
                    sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
1771
                    get_reloc_expr(name, sizeof(name), sym_name);
1772
                    type = ELF32_R_TYPE(rel->r_info);
1773
                    addend = rel->r_addend;
1774
                    switch(type) {
1775
                    case R_X86_64_32:
1776
                        fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = (uint32_t)%s + %d;\n", 
1777
                                rel->r_offset - start_offset, name, addend);
1778
                        break;
1779
                    case R_X86_64_32S:
1780
                        fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = (int32_t)%s + %d;\n", 
1781
                                rel->r_offset - start_offset, name, addend);
1782
                        break;
1783
                    case R_X86_64_PC32:
1784
                        fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d;\n", 
1785
                                rel->r_offset - start_offset, name, rel->r_offset - start_offset, addend);
1786
                        break;
1787
                    default:
1788
                        error("unsupported X86_64 relocation (%d)", type);
1789
                    }
1790
                }
1791
                }
1792
            }
1793
#elif defined(HOST_PPC)
1794
            {
1795
#ifdef CONFIG_FORMAT_ELF
1796
                char name[256];
1797
                int type;
1798
                int addend;
1799
                for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1800
                    if (rel->r_offset >= start_offset &&
1801
                        rel->r_offset < start_offset + copy_size) {
1802
                        sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
1803
                        if (strstart(sym_name, "__op_jmp", &p)) {
1804
                            int n;
1805
                            n = strtol(p, NULL, 10);
1806
                            /* __op_jmp relocations are done at
1807
                               runtime to do translated block
1808
                               chaining: the offset of the instruction
1809
                               needs to be stored */
1810
                            fprintf(outfile, "    jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
1811
                                    n, rel->r_offset - start_offset);
1812
                            continue;
1813
                        }
1814
                        
1815
                        get_reloc_expr(name, sizeof(name), sym_name);
1816
                        type = ELF32_R_TYPE(rel->r_info);
1817
                        addend = rel->r_addend;
1818
                        switch(type) {
1819
                        case R_PPC_ADDR32:
1820
                            fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n", 
1821
                                    rel->r_offset - start_offset, name, addend);
1822
                            break;
1823
                        case R_PPC_ADDR16_LO:
1824
                            fprintf(outfile, "    *(uint16_t *)(gen_code_ptr + %d) = (%s + %d);\n", 
1825
                                    rel->r_offset - start_offset, name, addend);
1826
                            break;
1827
                        case R_PPC_ADDR16_HI:
1828
                            fprintf(outfile, "    *(uint16_t *)(gen_code_ptr + %d) = (%s + %d) >> 16;\n", 
1829
                                    rel->r_offset - start_offset, name, addend);
1830
                            break;
1831
                        case R_PPC_ADDR16_HA:
1832
                            fprintf(outfile, "    *(uint16_t *)(gen_code_ptr + %d) = (%s + %d + 0x8000) >> 16;\n", 
1833
                                    rel->r_offset - start_offset, name, addend);
1834
                            break;
1835
                        case R_PPC_REL24:
1836
                            /* warning: must be at 32 MB distancy */
1837
                            fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | ((%s - (long)(gen_code_ptr + %d) + %d) & 0x03fffffc);\n", 
1838
                                    rel->r_offset - start_offset, rel->r_offset - start_offset, name, rel->r_offset - start_offset, addend);
1839
                            break;
1840
                        default:
1841
                            error("unsupported powerpc relocation (%d)", type);
1842
                        }
1843
                    }
1844
                }
1845
#elif defined(CONFIG_FORMAT_MACH)
1846
                                struct scattered_relocation_info *scarel;
1847
                                struct relocation_info * rel;
1848
                                char final_sym_name[256];
1849
                                const char *sym_name;
1850
                                const char *p;
1851
                                int slide, sslide;
1852
                                int i;
1853
        
1854
                                for(i = 0, rel = relocs; i < nb_relocs; i++, rel++) {
1855
                                        unsigned int offset, length, value = 0;
1856
                                        unsigned int type, pcrel, isym = 0;
1857
                                        unsigned int usesym = 0;
1858
                                
1859
                                        if(R_SCATTERED & rel->r_address) {
1860
                                                scarel = (struct scattered_relocation_info*)rel;
1861
                                                offset = (unsigned int)scarel->r_address;
1862
                                                length = scarel->r_length;
1863
                                                pcrel = scarel->r_pcrel;
1864
                                                type = scarel->r_type;
1865
                                                value = scarel->r_value;
1866
                                        } else {
1867
                                                value = isym = rel->r_symbolnum;
1868
                                                usesym = (rel->r_extern);
1869
                                                offset = rel->r_address;
1870
                                                length = rel->r_length;
1871
                                                pcrel = rel->r_pcrel;
1872
                                                type = rel->r_type;
1873
                                        }
1874
                                
1875
                                        slide = offset - start_offset;
1876
                
1877
                                        if (!(offset >= start_offset && offset < start_offset + size)) 
1878
                                                continue;  /* not in our range */
1879

    
1880
                                        sym_name = get_reloc_name(rel, &sslide);
1881
                                        
1882
                                        if(usesym && symtab[isym].n_type & N_STAB)
1883
                                                continue; /* don't handle STAB (debug sym) */
1884
                                        
1885
                                        if (sym_name && strstart(sym_name, "__op_jmp", &p)) {
1886
                                                int n;
1887
                                                n = strtol(p, NULL, 10);
1888
                                                fprintf(outfile, "    jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
1889
                                                        n, slide);
1890
                                                continue; /* Nothing more to do */
1891
                                        }
1892
                                        
1893
                                        if(!sym_name)
1894
                                        {
1895
                                                fprintf(outfile, "/* #warning relocation not handled in %s (value 0x%x, %s, offset 0x%x, length 0x%x, %s, type 0x%x) */\n",
1896
                                                           name, value, usesym ? "use sym" : "don't use sym", offset, length, pcrel ? "pcrel":"", type);
1897
                                                continue; /* dunno how to handle without final_sym_name */
1898
                                        }
1899
                                                                                                           
1900
                                        get_reloc_expr(final_sym_name, sizeof(final_sym_name), 
1901
                                                       sym_name);
1902
                                        switch(type) {
1903
                                        case PPC_RELOC_BR24:
1904
                                            if (!strstart(sym_name,"__op_gen_label",&p)) {
1905
                                                    fprintf(outfile, "{\n");
1906
                                                    fprintf(outfile, "    uint32_t imm = *(uint32_t *)(gen_code_ptr + %d) & 0x3fffffc;\n", slide);
1907
                                                    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", 
1908
                                                                                        slide, slide, name, sslide );
1909
                                                    fprintf(outfile, "}\n");
1910
                                            } else {
1911
                                                        fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | (((long)%s - (long)gen_code_ptr - %d) & 0x03fffffc);\n",
1912
                                                                                        slide, slide, final_sym_name, slide);
1913
                                            }
1914
                                                break;
1915
                                        case PPC_RELOC_HI16:
1916
                                                fprintf(outfile, "    *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d) >> 16;\n", 
1917
                                                        slide, final_sym_name, sslide);
1918
                                                break;
1919
                                        case PPC_RELOC_LO16:
1920
                                                fprintf(outfile, "    *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d);\n", 
1921
                                        slide, final_sym_name, sslide);
1922
                            break;
1923
                                        case PPC_RELOC_HA16:
1924
                                                fprintf(outfile, "    *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d + 0x8000) >> 16;\n", 
1925
                                                        slide, final_sym_name, sslide);
1926
                                                break;
1927
                                default:
1928
                                        error("unsupported powerpc relocation (%d)", type);
1929
                                }
1930
                        }
1931
#else
1932
#error unsupport object format
1933
#endif
1934
            }
1935
#elif defined(HOST_S390)
1936
            {
1937
                char name[256];
1938
                int type;
1939
                int addend;
1940
                for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1941
                    if (rel->r_offset >= start_offset &&
1942
                        rel->r_offset < start_offset + copy_size) {
1943
                        sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
1944
                        get_reloc_expr(name, sizeof(name), sym_name);
1945
                        type = ELF32_R_TYPE(rel->r_info);
1946
                        addend = rel->r_addend;
1947
                        switch(type) {
1948
                        case R_390_32:
1949
                            fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n", 
1950
                                    rel->r_offset - start_offset, name, addend);
1951
                            break;
1952
                        case R_390_16:
1953
                            fprintf(outfile, "    *(uint16_t *)(gen_code_ptr + %d) = %s + %d;\n", 
1954
                                    rel->r_offset - start_offset, name, addend);
1955
                            break;
1956
                        case R_390_8:
1957
                            fprintf(outfile, "    *(uint8_t *)(gen_code_ptr + %d) = %s + %d;\n", 
1958
                                    rel->r_offset - start_offset, name, addend);
1959
                            break;
1960
                        default:
1961
                            error("unsupported s390 relocation (%d)", type);
1962
                        }
1963
                    }
1964
                }
1965
            }
1966
#elif defined(HOST_ALPHA)
1967
            {
1968
                for (i = 0, rel = relocs; i < nb_relocs; i++, rel++) {
1969
                    if (rel->r_offset >= start_offset && rel->r_offset < start_offset + copy_size) {
1970
                        int type;
1971

    
1972
                        type = ELF64_R_TYPE(rel->r_info);
1973
                        sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name;
1974
                        switch (type) {
1975
                        case R_ALPHA_GPDISP:
1976
                            /* The gp is just 32 bit, and never changes, so it's easiest to emit it
1977
                               as an immediate instead of constructing it from the pv or ra.  */
1978
                            fprintf(outfile, "    immediate_ldah(gen_code_ptr + %ld, gp);\n",
1979
                                    rel->r_offset - start_offset);
1980
                            fprintf(outfile, "    immediate_lda(gen_code_ptr + %ld, gp);\n",
1981
                                    rel->r_offset - start_offset + rel->r_addend);
1982
                            break;
1983
                        case R_ALPHA_LITUSE:
1984
                            /* jsr to literal hint. Could be used to optimize to bsr. Ignore for
1985
                               now, since some called functions (libc) need pv to be set up.  */
1986
                            break;
1987
                        case R_ALPHA_HINT:
1988
                            /* Branch target prediction hint. Ignore for now.  Should be already
1989
                               correct for in-function jumps.  */
1990
                            break;
1991
                        case R_ALPHA_LITERAL:
1992
                            /* Load a literal from the GOT relative to the gp.  Since there's only a
1993
                               single gp, nothing is to be done.  */
1994
                            break;
1995
                        case R_ALPHA_GPRELHIGH:
1996
                            /* Handle fake relocations against __op_param symbol.  Need to emit the
1997
                               high part of the immediate value instead.  Other symbols need no
1998
                               special treatment.  */
1999
                            if (strstart(sym_name, "__op_param", &p))
2000
                                fprintf(outfile, "    immediate_ldah(gen_code_ptr + %ld, param%s);\n",
2001
                                        rel->r_offset - start_offset, p);
2002
                            break;
2003
                        case R_ALPHA_GPRELLOW:
2004
                            if (strstart(sym_name, "__op_param", &p))
2005
                                fprintf(outfile, "    immediate_lda(gen_code_ptr + %ld, param%s);\n",
2006
                                        rel->r_offset - start_offset, p);
2007
                            break;
2008
                        case R_ALPHA_BRSGP:
2009
                            /* PC-relative jump. Tweak offset to skip the two instructions that try to
2010
                               set up the gp from the pv.  */
2011
                            fprintf(outfile, "    fix_bsr(gen_code_ptr + %ld, (uint8_t *) &%s - (gen_code_ptr + %ld + 4) + 8);\n",
2012
                                    rel->r_offset - start_offset, sym_name, rel->r_offset - start_offset);
2013
                            break;
2014
                        default:
2015
                            error("unsupported Alpha relocation (%d)", type);
2016
                        }
2017
                    }
2018
                }
2019
            }
2020
#elif defined(HOST_IA64)
2021
            {
2022
                unsigned long sym_idx;
2023
                long code_offset;
2024
                char name[256];
2025
                int type;
2026
                long addend;
2027

    
2028
                for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2029
                    sym_idx = ELF64_R_SYM(rel->r_info);
2030
                    if (rel->r_offset < start_offset
2031
                        || rel->r_offset >= start_offset + copy_size)
2032
                        continue;
2033
                    sym_name = (strtab + symtab[sym_idx].st_name);
2034
                    if (strstart(sym_name, "__op_jmp", &p)) {
2035
                        int n;
2036
                        n = strtol(p, NULL, 10);
2037
                        /* __op_jmp relocations are done at
2038
                           runtime to do translated block
2039
                           chaining: the offset of the instruction
2040
                           needs to be stored */
2041
                        fprintf(outfile, "    jmp_offsets[%d] ="
2042
                                "%ld + (gen_code_ptr - gen_code_buf);\n",
2043
                                n, rel->r_offset - start_offset);
2044
                        continue;
2045
                    }
2046
                    get_reloc_expr(name, sizeof(name), sym_name);
2047
                    type = ELF64_R_TYPE(rel->r_info);
2048
                    addend = rel->r_addend;
2049
                    code_offset = rel->r_offset - start_offset;
2050
                    switch(type) {
2051
                      case R_IA64_IMM64:
2052
                          fprintf(outfile,
2053
                                  "    ia64_imm64(gen_code_ptr + %ld, "
2054
                                  "%s + %ld);\n",
2055
                                  code_offset, name, addend);
2056
                          break;
2057
                      case R_IA64_LTOFF22X:
2058
                      case R_IA64_LTOFF22:
2059
                          fprintf(outfile, "    IA64_LTOFF(gen_code_ptr + %ld,"
2060
                                  " %s + %ld, %d);\n",
2061
                                  code_offset, name, addend,
2062
                                  (type == R_IA64_LTOFF22X));
2063
                          break;
2064
                      case R_IA64_LDXMOV:
2065
                          fprintf(outfile,
2066
                                  "    ia64_ldxmov(gen_code_ptr + %ld,"
2067
                                  " %s + %ld);\n", code_offset, name, addend);
2068
                          break;
2069

    
2070
                      case R_IA64_PCREL21B:
2071
                          if (strstart(sym_name, "__op_gen_label", NULL)) {
2072
                              fprintf(outfile,
2073
                                      "    ia64_imm21b(gen_code_ptr + %ld,"
2074
                                      " (long) (%s + %ld -\n\t\t"
2075
                                      "((long) gen_code_ptr + %ld)) >> 4);\n",
2076
                                      code_offset, name, addend,
2077
                                      code_offset & ~0xfUL);
2078
                          } else {
2079
                              fprintf(outfile,
2080
                                      "    IA64_PLT(gen_code_ptr + %ld, "
2081
                                      "%d);\t/* %s + %ld */\n",
2082
                                      code_offset,
2083
                                      get_plt_index(sym_name, addend),
2084
                                      sym_name, addend);
2085
                          }
2086
                          break;
2087
                      default:
2088
                          error("unsupported ia64 relocation (0x%x)",
2089
                                type);
2090
                    }
2091
                }
2092
                fprintf(outfile, "    ia64_nop_b(gen_code_ptr + %d);\n",
2093
                        copy_size - 16 + 2);
2094
            }
2095
#elif defined(HOST_SPARC)
2096
            {
2097
                char name[256];
2098
                int type;
2099
                int addend;
2100
                for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2101
                    if (rel->r_offset >= start_offset &&
2102
                        rel->r_offset < start_offset + copy_size) {
2103
                        sym_name = strtab + symtab[ELF32_R_SYM(rel->r_info)].st_name;
2104
                        get_reloc_expr(name, sizeof(name), sym_name);
2105
                        type = ELF32_R_TYPE(rel->r_info);
2106
                        addend = rel->r_addend;
2107
                        switch(type) {
2108
                        case R_SPARC_32:
2109
                            fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n", 
2110
                                    rel->r_offset - start_offset, name, addend);
2111
                            break;
2112
                        case R_SPARC_HI22:
2113
                            fprintf(outfile,
2114
                                    "    *(uint32_t *)(gen_code_ptr + %d) = "
2115
                                    "((*(uint32_t *)(gen_code_ptr + %d)) "
2116
                                    " & ~0x3fffff) "
2117
                                    " | (((%s + %d) >> 10) & 0x3fffff);\n",
2118
                                    rel->r_offset - start_offset,
2119
                                    rel->r_offset - start_offset,
2120
                                    name, addend);
2121
                            break;
2122
                        case R_SPARC_LO10:
2123
                            fprintf(outfile,
2124
                                    "    *(uint32_t *)(gen_code_ptr + %d) = "
2125
                                    "((*(uint32_t *)(gen_code_ptr + %d)) "
2126
                                    " & ~0x3ff) "
2127
                                    " | ((%s + %d) & 0x3ff);\n",
2128
                                    rel->r_offset - start_offset,
2129
                                    rel->r_offset - start_offset,
2130
                                    name, addend);
2131
                            break;
2132
                        case R_SPARC_WDISP30:
2133
                            fprintf(outfile,
2134
                                    "    *(uint32_t *)(gen_code_ptr + %d) = "
2135
                                    "((*(uint32_t *)(gen_code_ptr + %d)) "
2136
                                    " & ~0x3fffffff) "
2137
                                    " | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
2138
                                    "    & 0x3fffffff);\n",
2139
                                    rel->r_offset - start_offset,
2140
                                    rel->r_offset - start_offset,
2141
                                    name, addend,
2142
                                    rel->r_offset - start_offset);
2143
                            break;
2144
                        default:
2145
                            error("unsupported sparc relocation (%d)", type);
2146
                        }
2147
                    }
2148
                }
2149
            }
2150
#elif defined(HOST_SPARC64)
2151
            {
2152
                char name[256];
2153
                int type;
2154
                int addend;
2155
                for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2156
                    if (rel->r_offset >= start_offset &&
2157
                        rel->r_offset < start_offset + copy_size) {
2158
                        sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name;
2159
                        get_reloc_expr(name, sizeof(name), sym_name);
2160
                        type = ELF64_R_TYPE(rel->r_info);
2161
                        addend = rel->r_addend;
2162
                        switch(type) {
2163
                        case R_SPARC_32:
2164
                            fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
2165
                                    rel->r_offset - start_offset, name, addend);
2166
                            break;
2167
                        case R_SPARC_HI22:
2168
                            fprintf(outfile,
2169
                                    "    *(uint32_t *)(gen_code_ptr + %d) = "
2170
                                    "((*(uint32_t *)(gen_code_ptr + %d)) "
2171
                                    " & ~0x3fffff) "
2172
                                    " | (((%s + %d) >> 10) & 0x3fffff);\n",
2173
                                    rel->r_offset - start_offset,
2174
                                    rel->r_offset - start_offset,
2175
                                    name, addend);
2176
                            break;
2177
                        case R_SPARC_LO10:
2178
                            fprintf(outfile,
2179
                                    "    *(uint32_t *)(gen_code_ptr + %d) = "
2180
                                    "((*(uint32_t *)(gen_code_ptr + %d)) "
2181
                                    " & ~0x3ff) "
2182
                                    " | ((%s + %d) & 0x3ff);\n",
2183
                                    rel->r_offset - start_offset,
2184
                                    rel->r_offset - start_offset,
2185
                                    name, addend);
2186
                            break;
2187
                        case R_SPARC_WDISP30:
2188
                            fprintf(outfile,
2189
                                    "    *(uint32_t *)(gen_code_ptr + %d) = "
2190
                                    "((*(uint32_t *)(gen_code_ptr + %d)) "
2191
                                    " & ~0x3fffffff) "
2192
                                    " | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
2193
                                    "    & 0x3fffffff);\n",
2194
                                    rel->r_offset - start_offset,
2195
                                    rel->r_offset - start_offset,
2196
                                    name, addend,
2197
                                    rel->r_offset - start_offset);
2198
                            break;
2199
                        default:
2200
                            error("unsupported sparc64 relocation (%d)", type);
2201
                        }
2202
                    }
2203
                }
2204
            }
2205
#elif defined(HOST_ARM)
2206
            {
2207
                char name[256];
2208
                int type;
2209
                int addend;
2210

    
2211
                arm_emit_ldr_info(name, start_offset, outfile, p_start, p_end,
2212
                                  relocs, nb_relocs);
2213

    
2214
                for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2215
                if (rel->r_offset >= start_offset &&
2216
                    rel->r_offset < start_offset + copy_size) {
2217
                    sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
2218
                    /* the compiler leave some unnecessary references to the code */
2219
                    if (sym_name[0] == '\0')
2220
                        continue;
2221
                    get_reloc_expr(name, sizeof(name), sym_name);
2222
                    type = ELF32_R_TYPE(rel->r_info);
2223
                    addend = get32((uint32_t *)(text + rel->r_offset));
2224
                    switch(type) {
2225
                    case R_ARM_ABS32:
2226
                        fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n", 
2227
                                rel->r_offset - start_offset, name, addend);
2228
                        break;
2229
                    case R_ARM_PC24:
2230
                        fprintf(outfile, "    arm_reloc_pc24((uint32_t *)(gen_code_ptr + %d), 0x%x, %s);\n", 
2231
                                rel->r_offset - start_offset, addend, name);
2232
                        break;
2233
                    default:
2234
                        error("unsupported arm relocation (%d)", type);
2235
                    }
2236
                }
2237
                }
2238
            }
2239
#elif defined(HOST_M68K)
2240
            {
2241
                char name[256];
2242
                int type;
2243
                int addend;
2244
                Elf32_Sym *sym;
2245
                for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2246
                if (rel->r_offset >= start_offset &&
2247
                    rel->r_offset < start_offset + copy_size) {
2248
                    sym = &(symtab[ELFW(R_SYM)(rel->r_info)]);
2249
                    sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
2250
                    get_reloc_expr(name, sizeof(name), sym_name);
2251
                    type = ELF32_R_TYPE(rel->r_info);
2252
                    addend = get32((uint32_t *)(text + rel->r_offset)) + rel->r_addend;
2253
                    switch(type) {
2254
                    case R_68K_32:
2255
                        fprintf(outfile, "    /* R_68K_32 RELOC, offset %x */\n", rel->r_offset) ;
2256
                        fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %#x;\n", 
2257
                                rel->r_offset - start_offset, name, addend );
2258
                        break;
2259
                    case R_68K_PC32:
2260
                        fprintf(outfile, "    /* R_68K_PC32 RELOC, offset %x */\n", rel->r_offset);
2261
                        fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %#x) + %#x;\n", 
2262
                                rel->r_offset - start_offset, name, rel->r_offset - start_offset, /*sym->st_value+*/ addend);
2263
                        break;
2264
                    default:
2265
                        error("unsupported m68k relocation (%d)", type);
2266
                    }
2267
                }
2268
                }
2269
            }
2270
#else
2271
#error unsupported CPU
2272
#endif
2273
        fprintf(outfile, "    gen_code_ptr += %d;\n", copy_size);
2274
        fprintf(outfile, "}\n");
2275
        fprintf(outfile, "break;\n\n");
2276
    } else {
2277
        fprintf(outfile, "static inline void gen_%s(", name);
2278
        if (nb_args == 0) {
2279
            fprintf(outfile, "void");
2280
        } else {
2281
            for(i = 0; i < nb_args; i++) {
2282
                if (i != 0)
2283
                    fprintf(outfile, ", ");
2284
                fprintf(outfile, "long param%d", i + 1);
2285
            }
2286
        }
2287
        fprintf(outfile, ")\n");
2288
        fprintf(outfile, "{\n");
2289
        for(i = 0; i < nb_args; i++) {
2290
            fprintf(outfile, "    *gen_opparam_ptr++ = param%d;\n", i + 1);
2291
        }
2292
        fprintf(outfile, "    *gen_opc_ptr++ = INDEX_%s;\n", name);
2293
        fprintf(outfile, "}\n\n");
2294
    }
2295
}
2296

    
2297
int gen_file(FILE *outfile, int out_type)
2298
{
2299
    int i;
2300
    EXE_SYM *sym;
2301

    
2302
    if (out_type == OUT_INDEX_OP) {
2303
        fprintf(outfile, "DEF(end, 0, 0)\n");
2304
        fprintf(outfile, "DEF(nop, 0, 0)\n");
2305
        fprintf(outfile, "DEF(nop1, 1, 0)\n");
2306
        fprintf(outfile, "DEF(nop2, 2, 0)\n");
2307
        fprintf(outfile, "DEF(nop3, 3, 0)\n");
2308
        for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
2309
            const char *name;
2310
            name = get_sym_name(sym);
2311
            if (strstart(name, OP_PREFIX, NULL)) {
2312
                gen_code(name, sym->st_value, sym->st_size, outfile, 2);
2313
            }
2314
        }
2315
    } else if (out_type == OUT_GEN_OP) {
2316
        /* generate gen_xxx functions */
2317
        fprintf(outfile, "#include \"dyngen-op.h\"\n");
2318
        for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
2319
            const char *name;
2320
            name = get_sym_name(sym);
2321
            if (strstart(name, OP_PREFIX, NULL)) {
2322
#if defined(CONFIG_FORMAT_ELF) || defined(CONFIG_FORMAT_COFF)
2323
                if (sym->st_shndx != text_shndx)
2324
                    error("invalid section for opcode (0x%x)", sym->st_shndx);
2325
#endif
2326
                gen_code(name, sym->st_value, sym->st_size, outfile, 0);
2327
            }
2328
        }
2329
        
2330
    } else {
2331
        /* generate big code generation switch */
2332
fprintf(outfile,
2333
"int dyngen_code(uint8_t *gen_code_buf,\n"
2334
"                uint16_t *label_offsets, uint16_t *jmp_offsets,\n"
2335
"                const uint16_t *opc_buf, const uint32_t *opparam_buf, const long *gen_labels)\n"
2336
"{\n"
2337
"    uint8_t *gen_code_ptr;\n"
2338
"    const uint16_t *opc_ptr;\n"
2339
"    const uint32_t *opparam_ptr;\n");
2340

    
2341
#ifdef HOST_ARM
2342
fprintf(outfile,
2343
"    uint8_t *last_gen_code_ptr = gen_code_buf;\n"
2344
"    LDREntry *arm_ldr_ptr = arm_ldr_table;\n"
2345
"    uint32_t *arm_data_ptr = arm_data_table;\n");
2346
#endif
2347
#ifdef HOST_IA64
2348
    {
2349
        long addend, not_first = 0;
2350
        unsigned long sym_idx;
2351
        int index, max_index;
2352
        const char *sym_name;
2353
        EXE_RELOC *rel;
2354

    
2355
        max_index = -1;
2356
        for (i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2357
            sym_idx = ELF64_R_SYM(rel->r_info);
2358
            sym_name = (strtab + symtab[sym_idx].st_name);
2359
            if (strstart(sym_name, "__op_gen_label", NULL))
2360
                continue;
2361
            if (ELF64_R_TYPE(rel->r_info) != R_IA64_PCREL21B)
2362
                continue;
2363

    
2364
            addend = rel->r_addend;
2365
            index = get_plt_index(sym_name, addend);
2366
            if (index <= max_index)
2367
                continue;
2368
            max_index = index;
2369
            fprintf(outfile, "    extern void %s(void);\n", sym_name);
2370
        }
2371

    
2372
        fprintf(outfile,
2373
                "    struct ia64_fixup *plt_fixes = NULL, "
2374
                "*ltoff_fixes = NULL;\n"
2375
                "    static long plt_target[] = {\n\t");
2376

    
2377
        max_index = -1;
2378
        for (i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2379
            sym_idx = ELF64_R_SYM(rel->r_info);
2380
            sym_name = (strtab + symtab[sym_idx].st_name);
2381
            if (strstart(sym_name, "__op_gen_label", NULL))
2382
                continue;
2383
            if (ELF64_R_TYPE(rel->r_info) != R_IA64_PCREL21B)
2384
                continue;
2385

    
2386
            addend = rel->r_addend;
2387
            index = get_plt_index(sym_name, addend);
2388
            if (index <= max_index)
2389
                continue;
2390
            max_index = index;
2391

    
2392
            if (not_first)
2393
                fprintf(outfile, ",\n\t");
2394
            not_first = 1;
2395
            if (addend)
2396
                fprintf(outfile, "(long) &%s + %ld", sym_name, addend);
2397
            else
2398
                fprintf(outfile, "(long) &%s", sym_name);
2399
        }
2400
        fprintf(outfile, "\n    };\n"
2401
            "    unsigned int plt_offset[%u] = { 0 };\n", max_index + 1);
2402
    }
2403
#endif
2404

    
2405
fprintf(outfile,
2406
"\n"
2407
"    gen_code_ptr = gen_code_buf;\n"
2408
"    opc_ptr = opc_buf;\n"
2409
"    opparam_ptr = opparam_buf;\n");
2410

    
2411
        /* Generate prologue, if needed. */ 
2412

    
2413
fprintf(outfile,
2414
"    for(;;) {\n"
2415
"        switch(*opc_ptr++) {\n"
2416
);
2417

    
2418
        for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
2419
            const char *name;
2420
            name = get_sym_name(sym);
2421
            if (strstart(name, OP_PREFIX, NULL)) {
2422
#if 0
2423
                printf("%4d: %s pos=0x%08x len=%d\n", 
2424
                       i, name, sym->st_value, sym->st_size);
2425
#endif
2426
#if defined(CONFIG_FORMAT_ELF) || defined(CONFIG_FORMAT_COFF)
2427
                if (sym->st_shndx != text_shndx)
2428
                    error("invalid section for opcode (0x%x)", sym->st_shndx);
2429
#endif
2430
                gen_code(name, sym->st_value, sym->st_size, outfile, 1);
2431
            }
2432
        }
2433

    
2434
fprintf(outfile,
2435
"        case INDEX_op_nop:\n"
2436
"            break;\n"
2437
"        case INDEX_op_nop1:\n"
2438
"            opparam_ptr++;\n"
2439
"            break;\n"
2440
"        case INDEX_op_nop2:\n"
2441
"            opparam_ptr += 2;\n"
2442
"            break;\n"
2443
"        case INDEX_op_nop3:\n"
2444
"            opparam_ptr += 3;\n"
2445
"            break;\n"
2446
"        default:\n"
2447
"            goto the_end;\n"
2448
"        }\n");
2449

    
2450
#ifdef HOST_ARM
2451
/* generate constant table if needed */
2452
fprintf(outfile,
2453
"        if ((gen_code_ptr - last_gen_code_ptr) >= (MAX_FRAG_SIZE - MAX_OP_SIZE)) {\n"
2454
"            gen_code_ptr = arm_flush_ldr(gen_code_ptr, arm_ldr_table, arm_ldr_ptr, arm_data_table, arm_data_ptr, 1);\n"
2455
"            last_gen_code_ptr = gen_code_ptr;\n"
2456
"            arm_ldr_ptr = arm_ldr_table;\n"
2457
"            arm_data_ptr = arm_data_table;\n"
2458
"        }\n");         
2459
#endif
2460

    
2461

    
2462
fprintf(outfile,
2463
"    }\n"
2464
" the_end:\n"
2465
);
2466
#ifdef HOST_IA64
2467
    fprintf(outfile,
2468
            "    ia64_apply_fixes(&gen_code_ptr, ltoff_fixes, "
2469
            "(uint64_t) code_gen_buffer + 2*(1<<20), plt_fixes,\n\t\t\t"
2470
            "sizeof(plt_target)/sizeof(plt_target[0]),\n\t\t\t"
2471
            "plt_target, plt_offset);\n");
2472
#endif
2473

    
2474
/* generate some code patching */ 
2475
#ifdef HOST_ARM
2476
fprintf(outfile, "gen_code_ptr = arm_flush_ldr(gen_code_ptr, arm_ldr_table, arm_ldr_ptr, arm_data_table, arm_data_ptr, 0);\n");
2477
#endif
2478
    /* flush instruction cache */
2479
    fprintf(outfile, "flush_icache_range((unsigned long)gen_code_buf, (unsigned long)gen_code_ptr);\n");
2480

    
2481
    fprintf(outfile, "return gen_code_ptr -  gen_code_buf;\n");
2482
    fprintf(outfile, "}\n\n");
2483

    
2484
    }
2485

    
2486
    return 0;
2487
}
2488

    
2489
void usage(void)
2490
{
2491
    printf("dyngen (c) 2003 Fabrice Bellard\n"
2492
           "usage: dyngen [-o outfile] [-c] objfile\n"
2493
           "Generate a dynamic code generator from an object file\n"
2494
           "-c     output enum of operations\n"
2495
           "-g     output gen_op_xx() functions\n"
2496
           );
2497
    exit(1);
2498
}
2499

    
2500
int main(int argc, char **argv)
2501
{
2502
    int c, out_type;
2503
    const char *filename, *outfilename;
2504
    FILE *outfile;
2505

    
2506
    outfilename = "out.c";
2507
    out_type = OUT_CODE;
2508
    for(;;) {
2509
        c = getopt(argc, argv, "ho:cg");
2510
        if (c == -1)
2511
            break;
2512
        switch(c) {
2513
        case 'h':
2514
            usage();
2515
            break;
2516
        case 'o':
2517
            outfilename = optarg;
2518
            break;
2519
        case 'c':
2520
            out_type = OUT_INDEX_OP;
2521
            break;
2522
        case 'g':
2523
            out_type = OUT_GEN_OP;
2524
            break;
2525
        }
2526
    }
2527
    if (optind >= argc)
2528
        usage();
2529
    filename = argv[optind];
2530
    outfile = fopen(outfilename, "w");
2531
    if (!outfile)
2532
        error("could not open '%s'", outfilename);
2533

    
2534
    load_object(filename);
2535
    gen_file(outfile, out_type);
2536
    fclose(outfile);
2537
    return 0;
2538
}