2 * image-writer.c: Creation of object files or assembly files using the same interface.
5 * Dietmar Maurer (dietmar@ximian.com)
6 * Zoltan Varga (vargaz@gmail.com)
7 * Paolo Molaro (lupus@ximian.com)
9 * (C) 2002 Ximian, Inc.
13 #include <sys/types.h>
32 #include <limits.h> /* for PAGESIZE */
37 #include "image-writer.h"
40 #include <mono/utils/freebsd-elf32.h>
41 #include <mono/utils/freebsd-elf64.h>
46 #define TV_DECLARE(name) gint64 name
47 #define TV_GETTIME(tv) tv = mono_100ns_ticks ()
48 #define TV_ELAPSED(start,end) (((end) - (start)) / 10)
51 * The used assembler dialect
52 * TARGET_ASM_APPLE == apple assembler on OSX
53 * TARGET_ASM_GAS == GNU assembler
55 #if !defined(TARGET_ASM_APPLE) && !defined(TARGET_ASM_GAS)
57 #define TARGET_ASM_APPLE
59 #define TARGET_ASM_GAS
64 * Defines for the directives used by different assemblers
66 #if defined(TARGET_POWERPC) || defined(__MACH__)
67 #define AS_STRING_DIRECTIVE ".asciz"
69 #define AS_STRING_DIRECTIVE ".string"
72 #define AS_INT32_DIRECTIVE ".long"
73 #define AS_INT64_DIRECTIVE ".quad"
75 #if (defined(TARGET_AMD64) || defined(TARGET_POWERPC64)) && !defined(__mono_ilp32__)
76 #define AS_POINTER_DIRECTIVE ".quad"
78 #define AS_POINTER_DIRECTIVE ".long"
81 #if defined(TARGET_ASM_APPLE)
82 #define AS_INT16_DIRECTIVE ".short"
83 #elif defined(TARGET_ASM_GAS)
84 #define AS_INT16_DIRECTIVE ".hword"
86 #define AS_INT16_DIRECTIVE ".word"
89 #if defined(TARGET_ASM_APPLE)
90 #define AS_SKIP_DIRECTIVE ".space"
92 #define AS_SKIP_DIRECTIVE ".skip"
95 #if defined(TARGET_ASM_APPLE)
96 #define AS_GLOBAL_PREFIX "_"
98 #define AS_GLOBAL_PREFIX ""
101 #ifdef TARGET_ASM_APPLE
102 #define AS_TEMP_LABEL_PREFIX "L"
104 #define AS_TEMP_LABEL_PREFIX ".L"
107 #define ALIGN_TO(val,align) ((((guint64)val) + ((align) - 1)) & ~((align) - 1))
108 #define ALIGN_PTR_TO(ptr,align) (gpointer)((((gssize)(ptr)) + (align - 1)) & (~(align - 1)))
109 #define ROUND_DOWN(VALUE,SIZE) ((VALUE) & ~((SIZE) - 1))
111 #if defined(TARGET_AMD64) && !defined(HOST_WIN32)
112 #define USE_ELF_WRITER 1
113 #define USE_ELF_RELA 1
116 #if defined(TARGET_X86) && !defined(TARGET_WIN32)
117 #define USE_ELF_WRITER 1
120 #if defined(TARGET_ARM) && !defined(__MACH__)
121 #define USE_ELF_WRITER 1
124 #if defined(__mips__)
125 #define USE_ELF_WRITER 1
128 #if defined(USE_ELF_WRITER)
129 #define USE_BIN_WRITER 1
132 #ifdef USE_BIN_WRITER
134 typedef struct _BinSymbol BinSymbol
;
135 typedef struct _BinReloc BinReloc
;
136 typedef struct _BinSection BinSection
;
148 struct _MonoImageWriter
{
149 MonoMemPool
*mempool
;
151 gboolean use_bin_writer
;
152 const char *current_section
;
153 int current_subsection
;
154 const char *section_stack
[16];
155 int subsection_stack
[16];
159 #ifdef USE_BIN_WRITER
161 BinSection
*sections
;
162 BinSection
*cur_section
;
163 BinReloc
*relocations
;
167 int out_buf_size
, out_buf_pos
;
171 int mode
; /* emit mode */
172 int col_count
; /* bytes emitted per .byte line */
176 static G_GNUC_UNUSED
int
177 ilog2(register int value
)
180 while (value
& ~0xf) count
+= 4, value
>>= 4;
181 while (value
) count
++, value
>>= 1;
185 #ifdef USE_BIN_WRITER
187 typedef struct _BinLabel BinLabel
;
198 BinSection
*val2_section
;
211 gboolean is_function
;
232 bin_writer_emit_start (MonoImageWriter
*acfg
)
234 acfg
->labels
= g_hash_table_new (g_str_hash
, g_str_equal
);
238 bin_writer_emit_section_change (MonoImageWriter
*acfg
, const char *section_name
, int subsection_index
)
242 if (acfg
->cur_section
&& acfg
->cur_section
->subsection
== subsection_index
243 && strcmp (acfg
->cur_section
->name
, section_name
) == 0)
245 for (section
= acfg
->sections
; section
; section
= section
->next
) {
246 if (section
->subsection
== subsection_index
&& strcmp (section
->name
, section_name
) == 0) {
247 acfg
->cur_section
= section
;
252 section
= g_new0 (BinSection
, 1);
253 section
->name
= g_strdup (section_name
);
254 section
->subsection
= subsection_index
;
255 section
->next
= acfg
->sections
;
256 acfg
->sections
= section
;
257 acfg
->cur_section
= section
;
262 bin_writer_set_section_addr (MonoImageWriter
*acfg
, guint64 addr
)
264 acfg
->cur_section
->addr
= addr
;
265 acfg
->cur_section
->has_addr
= TRUE
;
269 bin_writer_emit_symbol_inner (MonoImageWriter
*acfg
, const char *name
, const char *end_label
, gboolean is_global
, gboolean func
)
271 BinSymbol
*symbol
= g_new0 (BinSymbol
, 1);
272 symbol
->name
= g_strdup (name
);
274 symbol
->end_label
= g_strdup (end_label
);
275 symbol
->is_function
= func
;
276 symbol
->is_global
= is_global
;
277 symbol
->section
= acfg
->cur_section
;
278 /* FIXME: we align after this call... */
279 symbol
->offset
= symbol
->section
->cur_offset
;
280 symbol
->next
= acfg
->symbols
;
281 acfg
->symbols
= symbol
;
285 bin_writer_emit_global (MonoImageWriter
*acfg
, const char *name
, gboolean func
)
287 bin_writer_emit_symbol_inner (acfg
, name
, NULL
, TRUE
, func
);
291 bin_writer_emit_local_symbol (MonoImageWriter
*acfg
, const char *name
, const char *end_label
, gboolean func
)
293 bin_writer_emit_symbol_inner (acfg
, name
, end_label
, FALSE
, func
);
297 bin_writer_emit_label (MonoImageWriter
*acfg
, const char *name
)
299 BinLabel
*label
= g_new0 (BinLabel
, 1);
300 label
->name
= g_strdup (name
);
301 label
->section
= acfg
->cur_section
;
302 label
->offset
= acfg
->cur_section
->cur_offset
;
303 g_hash_table_insert (acfg
->labels
, label
->name
, label
);
307 bin_writer_emit_ensure_buffer (BinSection
*section
, int size
)
309 int new_offset
= section
->cur_offset
+ size
;
310 if (new_offset
>= section
->data_len
) {
311 int new_size
= section
->data_len
? section
->data_len
* 2: 256;
313 while (new_size
<= new_offset
)
315 data
= g_malloc0 (new_size
);
316 memcpy (data
, section
->data
, section
->data_len
);
317 g_free (section
->data
);
318 section
->data
= data
;
319 section
->data_len
= new_size
;
324 bin_writer_emit_bytes (MonoImageWriter
*acfg
, const guint8
* buf
, int size
)
326 bin_writer_emit_ensure_buffer (acfg
->cur_section
, size
);
327 memcpy (acfg
->cur_section
->data
+ acfg
->cur_section
->cur_offset
, buf
, size
);
328 acfg
->cur_section
->cur_offset
+= size
;
332 bin_writer_emit_string (MonoImageWriter
*acfg
, const char *value
)
334 int size
= strlen (value
) + 1;
335 bin_writer_emit_bytes (acfg
, (const guint8
*)value
, size
);
339 bin_writer_emit_line (MonoImageWriter
*acfg
)
341 /* Nothing to do in binary writer */
345 bin_writer_emit_alignment (MonoImageWriter
*acfg
, int size
)
347 int offset
= acfg
->cur_section
->cur_offset
;
349 offset
+= (size
- 1);
350 offset
&= ~(size
- 1);
351 add
= offset
- acfg
->cur_section
->cur_offset
;
353 bin_writer_emit_ensure_buffer (acfg
->cur_section
, add
);
354 acfg
->cur_section
->cur_offset
+= add
;
359 bin_writer_emit_pointer_unaligned (MonoImageWriter
*acfg
, const char *target
)
365 g_assert_not_reached ();
366 reloc
= g_new0 (BinReloc
, 1);
367 reloc
->val1
= g_strdup (target
);
368 reloc
->section
= acfg
->cur_section
;
369 reloc
->section_offset
= acfg
->cur_section
->cur_offset
;
370 reloc
->next
= acfg
->relocations
;
371 acfg
->relocations
= reloc
;
372 if (strcmp (reloc
->section
->name
, ".data") == 0) {
374 //g_print ("reloc: %s at %d\n", target, acfg->cur_section->cur_offset);
376 acfg
->cur_section
->cur_offset
+= sizeof (gpointer
);
380 bin_writer_emit_pointer (MonoImageWriter
*acfg
, const char *target
)
382 bin_writer_emit_alignment (acfg
, sizeof (gpointer
));
383 bin_writer_emit_pointer_unaligned (acfg
, target
);
387 bin_writer_emit_int16 (MonoImageWriter
*acfg
, int value
)
390 bin_writer_emit_ensure_buffer (acfg
->cur_section
, 2);
391 data
= acfg
->cur_section
->data
+ acfg
->cur_section
->cur_offset
;
392 acfg
->cur_section
->cur_offset
+= 2;
393 /* FIXME: little endian */
395 data
[1] = value
>> 8;
399 bin_writer_emit_int32 (MonoImageWriter
*acfg
, int value
)
402 bin_writer_emit_ensure_buffer (acfg
->cur_section
, 4);
403 data
= acfg
->cur_section
->data
+ acfg
->cur_section
->cur_offset
;
404 acfg
->cur_section
->cur_offset
+= 4;
405 /* FIXME: little endian */
407 data
[1] = value
>> 8;
408 data
[2] = value
>> 16;
409 data
[3] = value
>> 24;
413 create_reloc (MonoImageWriter
*acfg
, const char *end
, const char* start
, int offset
)
416 reloc
= mono_mempool_alloc0 (acfg
->mempool
, sizeof (BinReloc
));
417 reloc
->val1
= mono_mempool_strdup (acfg
->mempool
, end
);
418 if (strcmp (start
, ".") == 0) {
419 reloc
->val2_section
= acfg
->cur_section
;
420 reloc
->val2_offset
= acfg
->cur_section
->cur_offset
;
422 reloc
->val2
= mono_mempool_strdup (acfg
->mempool
, start
);
424 reloc
->offset
= offset
;
425 reloc
->section
= acfg
->cur_section
;
426 reloc
->section_offset
= acfg
->cur_section
->cur_offset
;
427 reloc
->next
= acfg
->relocations
;
428 acfg
->relocations
= reloc
;
433 bin_writer_emit_symbol_diff (MonoImageWriter
*acfg
, const char *end
, const char* start
, int offset
)
435 create_reloc (acfg
, end
, start
, offset
);
436 acfg
->cur_section
->cur_offset
+= 4;
437 /*if (strcmp (reloc->section->name, ".data") == 0) {
439 g_print ("reloc: %s - %s + %d at %d\n", end, start, offset, acfg->cur_section->cur_offset - 4);
444 * Emit a relocation entry of type RELOC_TYPE against symbol SYMBOL at the current PC.
447 static G_GNUC_UNUSED
void
448 bin_writer_emit_reloc (MonoImageWriter
*acfg
, int reloc_type
, const char *symbol
, int addend
)
450 BinReloc
*reloc
= create_reloc (acfg
, symbol
, ".", addend
);
451 reloc
->reloc_type
= reloc_type
;
455 bin_writer_emit_zero_bytes (MonoImageWriter
*acfg
, int num
)
457 bin_writer_emit_ensure_buffer (acfg
->cur_section
, num
);
458 acfg
->cur_section
->cur_offset
+= num
;
461 #ifdef USE_ELF_WRITER
486 #if SIZEOF_VOID_P == 4
488 typedef Elf32_Ehdr ElfHeader
;
489 typedef Elf32_Shdr ElfSectHeader
;
490 typedef Elf32_Phdr ElfProgHeader
;
491 typedef Elf32_Sym ElfSymbol
;
492 typedef Elf32_Rel ElfReloc
;
493 typedef Elf32_Rela ElfRelocA
;
494 typedef Elf32_Dyn ElfDynamic
;
498 typedef Elf64_Ehdr ElfHeader
;
499 typedef Elf64_Shdr ElfSectHeader
;
500 typedef Elf64_Phdr ElfProgHeader
;
501 typedef Elf64_Sym ElfSymbol
;
502 typedef Elf64_Rel ElfReloc
;
503 typedef Elf64_Rela ElfRelocA
;
504 typedef Elf64_Dyn ElfDynamic
;
516 static SectInfo section_info
[] = {
518 {".hash", SHT_HASH
, 4, 2, SIZEOF_VOID_P
},
519 {".dynsym", SHT_DYNSYM
, sizeof (ElfSymbol
), 2, SIZEOF_VOID_P
},
520 {".dynstr", SHT_STRTAB
, 0, 2, 1},
521 {".rel.dyn", SHT_REL
, sizeof (ElfReloc
), 2, SIZEOF_VOID_P
},
522 {".rela.dyn", SHT_RELA
, sizeof (ElfRelocA
), 2, SIZEOF_VOID_P
},
523 {".text", SHT_PROGBITS
, 0, 6, 4096},
524 {".dynamic", SHT_DYNAMIC
, sizeof (ElfDynamic
), 3, SIZEOF_VOID_P
},
525 {".got.plt", SHT_PROGBITS
, SIZEOF_VOID_P
, 3, SIZEOF_VOID_P
},
526 {".data", SHT_PROGBITS
, 0, 3, 8},
527 {".bss", SHT_NOBITS
, 0, 3, 8},
528 {".debug_frame", SHT_PROGBITS
, 0, 0, 8},
529 {".debug_info", SHT_PROGBITS
, 0, 0, 1},
530 {".debug_abbrev", SHT_PROGBITS
, 0, 0, 1},
531 {".debug_line", SHT_PROGBITS
, 0, 0, 1},
532 {".debug_loc", SHT_PROGBITS
, 0, 0, 1},
533 {".shstrtab", SHT_STRTAB
, 0, 0, 1},
534 {".symtab", SHT_SYMTAB
, sizeof (ElfSymbol
), 0, SIZEOF_VOID_P
},
535 {".strtab", SHT_STRTAB
, 0, 0, 1}
544 str_table_add (ElfStrTable
*table
, const char* value
)
548 table
->data
= g_string_new_len ("", 1);
549 table
->hash
= g_hash_table_new (g_str_hash
, g_str_equal
);
551 idx
= GPOINTER_TO_UINT (g_hash_table_lookup (table
->hash
, value
));
554 idx
= table
->data
->len
;
555 g_string_append (table
->data
, value
);
556 g_string_append_c (table
->data
, 0);
557 g_hash_table_insert (table
->hash
, (void*)value
, GUINT_TO_POINTER (idx
));
562 append_subsection (MonoImageWriter
*acfg
, ElfSectHeader
*sheaders
, BinSection
*sect
, BinSection
*add
)
564 int offset
= sect
->cur_offset
;
565 /*offset += (sheaders [sect->shidx].sh_addralign - 1);
566 offset &= ~(sheaders [sect->shidx].sh_addralign - 1);*/
568 * FIXME: we shouldn't align subsections at all, but if we don't then the
569 * stuff inside the subsections which is aligned won't get aligned.
571 if (strcmp (sect
->name
, ".debug_line") != 0) {
575 bin_writer_emit_ensure_buffer (sect
, offset
);
576 //g_print ("section %s aligned to %d from %d\n", sect->name, offset, sect->cur_offset);
577 sect
->cur_offset
= offset
;
579 bin_writer_emit_ensure_buffer (sect
, add
->cur_offset
);
580 memcpy (sect
->data
+ sect
->cur_offset
, add
->data
, add
->cur_offset
);
582 sect
->cur_offset
+= add
->cur_offset
;
583 add
->cur_offset
= offset
; /* it becomes the offset in the parent section */
584 //g_print ("subsection %d of %s added at offset %d (align: %d)\n", add->subsection, sect->name, add->cur_offset, (int)sheaders [sect->shidx].sh_addralign);
589 /* merge the subsections */
591 collect_sections (MonoImageWriter
*acfg
, ElfSectHeader
*sheaders
, BinSection
**out
, int num
)
593 int i
, j
, maxs
, num_sections
;
598 for (sect
= acfg
->sections
; sect
; sect
= sect
->next
) {
599 if (sect
->subsection
== 0) {
600 out
[num_sections
++] = sect
;
601 g_assert (num_sections
< num
);
603 maxs
= MAX (maxs
, sect
->subsection
);
605 for (i
= 0; i
< num_sections
; i
++) {
606 for (j
= 1; j
<= maxs
; ++j
) {
607 for (sect
= acfg
->sections
; sect
; sect
= sect
->next
) {
608 if (sect
->subsection
== j
&& strcmp (out
[i
]->name
, sect
->name
) == 0) {
609 append_subsection (acfg
, sheaders
, out
[i
], sect
);
618 elf_hash (const unsigned char *name
)
620 unsigned long h
= 0, g
;
622 h
= (h
<< 4) + *name
++;
623 if ((g
= h
& 0xf0000000))
630 #define NUM_BUCKETS 17
633 build_hash (MonoImageWriter
*acfg
, int num_sections
, ElfStrTable
*dynstr
)
636 int num_symbols
= 1 + num_sections
+ 3;
639 for (symbol
= acfg
->symbols
; symbol
; symbol
= symbol
->next
) {
640 if (!symbol
->is_global
)
643 str_table_add (dynstr
, symbol
->name
);
644 /*g_print ("adding sym: %s\n", symbol->name);*/
646 str_table_add (dynstr
, "__bss_start");
647 str_table_add (dynstr
, "_edata");
648 str_table_add (dynstr
, "_end");
650 data
= g_new0 (int, num_symbols
+ 2 + NUM_BUCKETS
);
651 data
[0] = NUM_BUCKETS
;
652 data
[1] = num_symbols
;
658 get_label_addr (MonoImageWriter
*acfg
, const char *name
)
665 lab
= g_hash_table_lookup (acfg
->labels
, name
);
667 g_error ("Undefined label: '%s'.\n", name
);
668 section
= lab
->section
;
669 offset
= lab
->offset
;
670 if (section
->parent
) {
671 value
= section
->parent
->virt_offset
+ section
->cur_offset
+ offset
;
673 value
= section
->virt_offset
+ offset
;
679 collect_syms (MonoImageWriter
*acfg
, int *hash
, ElfStrTable
*strtab
, ElfSectHeader
*sheaders
, int *num_syms
)
690 symbols
= g_new0 (ElfSymbol
, hash
[1]);
693 for (symbol
= acfg
->symbols
; symbol
; symbol
= symbol
->next
)
696 symbols
= g_new0 (ElfSymbol
, i
+ SECT_NUM
+ 10); /* FIXME */
699 /* the first symbol is undef, all zeroes */
703 for (j
= 1; j
< SECT_NUM
; ++j
) {
704 symbols
[i
].st_info
= ELF32_ST_INFO (STB_LOCAL
, STT_SECTION
);
705 symbols
[i
].st_shndx
= j
;
706 symbols
[i
].st_value
= sheaders
[j
].sh_addr
;
710 for (section
= acfg
->sections
; section
; section
= section
->next
) {
713 symbols
[i
].st_info
= ELF32_ST_INFO (STB_LOCAL
, STT_SECTION
);
714 if (strcmp (section
->name
, ".text") == 0) {
715 symbols
[i
].st_shndx
= SECT_TEXT
;
716 section
->shidx
= SECT_TEXT
;
717 section
->file_offset
= 4096;
718 symbols
[i
].st_value
= section
->virt_offset
;
719 } else if (strcmp (section
->name
, ".data") == 0) {
720 symbols
[i
].st_shndx
= SECT_DATA
;
721 section
->shidx
= SECT_DATA
;
722 section
->file_offset
= 4096 + 28; /* FIXME */
723 symbols
[i
].st_value
= section
->virt_offset
;
724 } else if (strcmp (section
->name
, ".bss") == 0) {
725 symbols
[i
].st_shndx
= SECT_BSS
;
726 section
->shidx
= SECT_BSS
;
727 section
->file_offset
= 4096 + 28 + 8; /* FIXME */
728 symbols
[i
].st_value
= section
->virt_offset
;
733 for (symbol
= acfg
->symbols
; symbol
; symbol
= symbol
->next
) {
736 if (!symbol
->is_global
&& hash
)
738 symbols
[i
].st_info
= ELF32_ST_INFO (symbol
->is_global
? STB_GLOBAL
: STB_LOCAL
, symbol
->is_function
? STT_FUNC
: STT_OBJECT
);
739 symbols
[i
].st_name
= str_table_add (strtab
, symbol
->name
);
740 /*g_print ("sym name %s tabled to %d\n", symbol->name, symbols [i].st_name);*/
741 section
= symbol
->section
;
742 symbols
[i
].st_shndx
= section
->parent
? section
->parent
->shidx
: section
->shidx
;
743 lab
= g_hash_table_lookup (acfg
->labels
, symbol
->name
);
744 offset
= lab
->offset
;
745 if (section
->parent
) {
746 symbols
[i
].st_value
= section
->parent
->virt_offset
+ section
->cur_offset
+ offset
;
748 symbols
[i
].st_value
= section
->virt_offset
+ offset
;
751 if (symbol
->end_label
) {
752 BinLabel
*elab
= g_hash_table_lookup (acfg
->labels
, symbol
->end_label
);
754 symbols
[i
].st_size
= elab
->offset
- lab
->offset
;
758 /* add special symbols */
759 symbols
[i
].st_name
= str_table_add (strtab
, "__bss_start");
760 symbols
[i
].st_shndx
= 0xfff1;
761 symbols
[i
].st_info
= ELF32_ST_INFO (STB_GLOBAL
, 0);
763 symbols
[i
].st_name
= str_table_add (strtab
, "_edata");
764 symbols
[i
].st_shndx
= 0xfff1;
765 symbols
[i
].st_info
= ELF32_ST_INFO (STB_GLOBAL
, 0);
767 symbols
[i
].st_name
= str_table_add (strtab
, "_end");
768 symbols
[i
].st_shndx
= 0xfff1;
769 symbols
[i
].st_info
= ELF32_ST_INFO (STB_GLOBAL
, 0);
775 /* add to hash table */
778 chain
= hash
+ 2 + hash
[0];
779 for (i
= 0; i
< hash
[1]; ++i
) {
781 /*g_print ("checking %d '%s' (sym %d)\n", symbols [i].st_name, strtab->data->str + symbols [i].st_name, i);*/
782 if (!symbols
[i
].st_name
)
784 hashc
= elf_hash ((guint8
*)strtab
->data
->str
+ symbols
[i
].st_name
);
785 slot
= hashc
% hash
[0];
786 /*g_print ("hashing '%s' at slot %d (sym %d)\n", strtab->data->str + symbols [i].st_name, slot, i);*/
788 chain
[i
] = bucket
[slot
];
799 reloc_symbols (MonoImageWriter
*acfg
, ElfSymbol
*symbols
, ElfSectHeader
*sheaders
, ElfStrTable
*strtab
, gboolean dynamic
)
807 for (section
= acfg
->sections
; section
; section
= section
->next
) {
810 symbols
[i
].st_value
= sheaders
[section
->shidx
].sh_addr
;
814 for (i
= 1; i
< SECT_NUM
; ++i
) {
815 symbols
[i
].st_value
= sheaders
[i
].sh_addr
;
818 for (symbol
= acfg
->symbols
; symbol
; symbol
= symbol
->next
) {
821 if (dynamic
&& !symbol
->is_global
)
823 section
= symbol
->section
;
824 lab
= g_hash_table_lookup (acfg
->labels
, symbol
->name
);
825 offset
= lab
->offset
;
826 if (section
->parent
) {
827 symbols
[i
].st_value
= sheaders
[section
->parent
->shidx
].sh_addr
+ section
->cur_offset
+ offset
;
829 symbols
[i
].st_value
= sheaders
[section
->shidx
].sh_addr
+ offset
;
834 symbols
[i
].st_value
= sheaders
[SECT_BSS
].sh_addr
;
837 symbols
[i
].st_value
= sheaders
[SECT_DATA
].sh_addr
+ sheaders
[SECT_DATA
].sh_size
;
840 symbols
[i
].st_value
= sheaders
[SECT_BSS
].sh_addr
+ sheaders
[SECT_BSS
].sh_size
;
845 resolve_reloc (MonoImageWriter
*acfg
, BinReloc
*reloc
, guint8
**out_data
, gsize
*out_vaddr
, gsize
*out_start_val
, gsize
*out_end_val
)
848 gssize end_val
, start_val
;
851 end_val
= get_label_addr (acfg
, reloc
->val1
);
853 start_val
= get_label_addr (acfg
, reloc
->val2
);
854 } else if (reloc
->val2_section
) {
855 start_val
= reloc
->val2_offset
;
856 if (reloc
->val2_section
->parent
)
857 start_val
+= reloc
->val2_section
->parent
->virt_offset
+ reloc
->val2_section
->cur_offset
;
859 start_val
+= reloc
->val2_section
->virt_offset
;
863 end_val
= end_val
- start_val
+ reloc
->offset
;
864 if (reloc
->section
->parent
) {
865 data
= reloc
->section
->parent
->data
;
866 data
+= reloc
->section
->cur_offset
;
867 data
+= reloc
->section_offset
;
868 vaddr
= reloc
->section
->parent
->virt_offset
;
869 vaddr
+= reloc
->section
->cur_offset
;
870 vaddr
+= reloc
->section_offset
;
872 data
= reloc
->section
->data
;
873 data
+= reloc
->section_offset
;
874 vaddr
= reloc
->section
->virt_offset
;
875 vaddr
+= reloc
->section_offset
;
878 *out_start_val
= start_val
;
879 *out_end_val
= end_val
;
887 resolve_relocations (MonoImageWriter
*acfg
)
891 gsize end_val
, start_val
;
896 rr
= g_new0 (ElfRelocA
, acfg
->num_relocs
);
899 for (reloc
= acfg
->relocations
; reloc
; reloc
= reloc
->next
) {
900 resolve_reloc (acfg
, reloc
, &data
, &vaddr
, &start_val
, &end_val
);
901 /* FIXME: little endian */
903 data
[1] = end_val
>> 8;
904 data
[2] = end_val
>> 16;
905 data
[3] = end_val
>> 24;
907 if (start_val
== 0 && reloc
->val1
[0] != '.') {
908 rr
[i
].r_offset
= vaddr
;
909 rr
[i
].r_info
= R_X86_64_RELATIVE
;
910 rr
[i
].r_addend
= end_val
;
912 g_assert (i
<= acfg
->num_relocs
);
918 #else /* USE_ELF_RELA */
921 do_reloc (MonoImageWriter
*acfg
, BinReloc
*reloc
, guint8
*data
, gssize addr
)
925 * We use the official ARM relocation types, but implement only the stuff actually
926 * needed by the code we generate.
928 switch (reloc
->reloc_type
) {
931 guint32
*code
= (guint32
*)(gpointer
)data
;
935 if (reloc
->reloc_type
== R_ARM_CALL
)
937 g_assert (data
[3] == 0xeb);
940 g_assert (data
[3] == 0xea);
941 if (diff
>= 0 && diff
<= 33554431) {
943 ins
= (ins
& 0xff000000) | diff
;
945 } else if (diff
<= 0 && diff
>= -33554432) {
947 ins
= (ins
& 0xff000000) | (diff
& ~0xff000000);
950 g_assert_not_reached ();
954 case R_ARM_ALU_PC_G0_NC
: {
955 /* Generated by emit_plt () */
959 g_assert (val
<= 0xffffff);
961 ARM_ADD_REG_IMM (code
, ARMREG_IP
, ARMREG_PC
, (val
& 0xFF0000) >> 16, 16);
963 ARM_ADD_REG_IMM (code
, ARMREG_IP
, ARMREG_PC
, 0, 0);
964 ARM_ADD_REG_IMM (code
, ARMREG_IP
, ARMREG_IP
, (val
& 0xFF00) >> 8, 24);
965 ARM_LDR_IMM (code
, ARMREG_PC
, ARMREG_IP
, val
& 0xFF);
969 g_assert_not_reached ();
972 g_assert_not_reached ();
977 resolve_relocations (MonoImageWriter
*acfg
)
981 gsize end_val
, start_val
;
986 rr
= g_new0 (ElfReloc
, acfg
->num_relocs
);
989 for (reloc
= acfg
->relocations
; reloc
; reloc
= reloc
->next
) {
990 resolve_reloc (acfg
, reloc
, &data
, &vaddr
, &start_val
, &end_val
);
991 /* FIXME: little endian */
992 if (reloc
->reloc_type
) {
994 g_assert (start_val
> 0);
995 do_reloc (acfg
, reloc
, data
, end_val
);
998 data
[1] = end_val
>> 8;
999 data
[2] = end_val
>> 16;
1000 data
[3] = end_val
>> 24;
1003 if (start_val
== 0 && reloc
->val1
[0] != '.') {
1004 rr
[i
].r_offset
= vaddr
;
1005 rr
[i
].r_info
= R_386_RELATIVE
;
1007 g_assert (i
<= acfg
->num_relocs
);
1013 #endif /* USE_ELF_RELA */
1016 bin_writer_fwrite (MonoImageWriter
*acfg
, void *val
, size_t size
, size_t nmemb
)
1019 fwrite (val
, size
, nmemb
, acfg
->fp
);
1021 g_assert (acfg
->out_buf_pos
+ (size
* nmemb
) <= acfg
->out_buf_size
);
1022 memcpy (acfg
->out_buf
+ acfg
->out_buf_pos
, val
, size
* nmemb
);
1023 acfg
->out_buf_pos
+= (size
* nmemb
);
1028 bin_writer_fseek (MonoImageWriter
*acfg
, int offset
)
1031 fseek (acfg
->fp
, offset
, SEEK_SET
);
1033 acfg
->out_buf_pos
= offset
;
1036 static int normal_sections
[] = { SECT_DATA
, SECT_DEBUG_FRAME
, SECT_DEBUG_INFO
, SECT_DEBUG_ABBREV
, SECT_DEBUG_LINE
, SECT_DEBUG_LOC
};
1039 bin_writer_emit_writeout (MonoImageWriter
*acfg
)
1043 ElfProgHeader progh
[3];
1044 ElfSectHeader secth
[SECT_NUM
];
1050 ElfStrTable str_table
= {NULL
, NULL
};
1051 ElfStrTable sh_str_table
= {NULL
, NULL
};
1052 ElfStrTable dyn_str_table
= {NULL
, NULL
};
1053 BinSection
* all_sections
[32];
1054 BinSection
* sections
[SECT_NUM
];
1057 ElfDynamic dynamic
[14];
1059 int i
, num_sections
, file_offset
, virt_offset
, size
, num_symtab
;
1064 /* Section headers */
1065 memset (§h
, 0, sizeof (secth
));
1066 memset (&dynamic
, 0, sizeof (dynamic
));
1067 memset (&header
, 0, sizeof (header
));
1069 for (i
= 1; i
< SECT_NUM
; ++i
) {
1070 secth
[i
].sh_name
= str_table_add (&sh_str_table
, section_info
[i
].name
);
1071 secth
[i
].sh_type
= section_info
[i
].type
;
1072 secth
[i
].sh_addralign
= section_info
[i
].align
;
1073 secth
[i
].sh_flags
= section_info
[i
].flags
;
1074 secth
[i
].sh_entsize
= section_info
[i
].esize
;
1076 secth
[SECT_DYNSYM
].sh_info
= SIZEOF_VOID_P
== 4 ? 4 : 2;
1077 secth
[SECT_SYMTAB
].sh_info
= SIZEOF_VOID_P
== 4 ? 20 : 17;
1078 secth
[SECT_HASH
].sh_link
= SECT_DYNSYM
;
1079 secth
[SECT_DYNSYM
].sh_link
= SECT_DYNSTR
;
1080 secth
[SECT_REL_DYN
].sh_link
= SECT_DYNSYM
;
1081 secth
[SECT_RELA_DYN
].sh_link
= SECT_DYNSYM
;
1082 secth
[SECT_DYNAMIC
].sh_link
= SECT_DYNSTR
;
1083 secth
[SECT_SYMTAB
].sh_link
= SECT_STRTAB
;
1085 num_sections
= collect_sections (acfg
, secth
, all_sections
, 16);
1086 hash
= build_hash (acfg
, num_sections
, &dyn_str_table
);
1087 num_symtab
= hash
[1]; /* FIXME */
1089 g_print ("num_sections: %d\n", num_sections
);
1090 g_print ("dynsym: %d, dynstr size: %d\n", hash
[1], (int)dyn_str_table
.data
->len
);
1091 for (i
= 0; i
< num_sections
; ++i
) {
1092 g_print ("section %s, size: %d, %x\n", all_sections
[i
]->name
, all_sections
[i
]->cur_offset
, all_sections
[i
]->cur_offset
);
1095 /* Associate the bin sections with the ELF sections */
1096 memset (sections
, 0, sizeof (sections
));
1097 for (i
= 0; i
< num_sections
; ++i
) {
1098 BinSection
*sect
= all_sections
[i
];
1101 for (j
= 0; j
< SECT_NUM
; ++j
) {
1102 if (strcmp (sect
->name
, section_info
[j
].name
) == 0) {
1108 sections
[all_sections
[i
]->shidx
] = sect
;
1111 /* at this point we know where in the file the first segment sections go */
1112 dynsym
= collect_syms (acfg
, hash
, &dyn_str_table
, NULL
, NULL
);
1113 num_local_syms
= hash
[1];
1114 symtab
= collect_syms (acfg
, NULL
, &str_table
, secth
, &num_local_syms
);
1116 file_offset
= virt_offset
= sizeof (header
) + sizeof (progh
);
1117 secth
[SECT_HASH
].sh_addr
= secth
[SECT_HASH
].sh_offset
= file_offset
;
1118 size
= sizeof (int) * (2 + hash
[0] + hash
[1]);
1119 virt_offset
= (file_offset
+= size
);
1120 secth
[SECT_HASH
].sh_size
= size
;
1121 secth
[SECT_DYNSYM
].sh_addr
= secth
[SECT_DYNSYM
].sh_offset
= file_offset
;
1122 size
= sizeof (ElfSymbol
) * hash
[1];
1123 virt_offset
= (file_offset
+= size
);
1124 secth
[SECT_DYNSYM
].sh_size
= size
;
1125 secth
[SECT_DYNSTR
].sh_addr
= secth
[SECT_DYNSTR
].sh_offset
= file_offset
;
1126 size
= dyn_str_table
.data
->len
;
1127 virt_offset
= (file_offset
+= size
);
1128 secth
[SECT_DYNSTR
].sh_size
= size
;
1130 file_offset
&= ~(4-1);
1131 secth
[SECT_REL_DYN
].sh_addr
= secth
[SECT_REL_DYN
].sh_offset
= file_offset
;
1132 #ifndef USE_ELF_RELA
1133 size
= sizeof (ElfReloc
) * acfg
->num_relocs
;
1137 virt_offset
= (file_offset
+= size
);
1138 secth
[SECT_REL_DYN
].sh_size
= size
;
1139 secth
[SECT_RELA_DYN
].sh_addr
= secth
[SECT_RELA_DYN
].sh_offset
= file_offset
;
1141 size
= sizeof (ElfRelocA
) * acfg
->num_relocs
;
1145 virt_offset
= (file_offset
+= size
);
1146 secth
[SECT_RELA_DYN
].sh_size
= size
;
1148 file_offset
= ALIGN_TO (file_offset
, secth
[SECT_TEXT
].sh_addralign
);
1149 virt_offset
= file_offset
;
1150 secth
[SECT_TEXT
].sh_addr
= secth
[SECT_TEXT
].sh_offset
= file_offset
;
1151 if (sections
[SECT_TEXT
]) {
1152 if (sections
[SECT_TEXT
]->has_addr
) {
1153 secth
[SECT_TEXT
].sh_addr
= sections
[SECT_TEXT
]->addr
;
1154 secth
[SECT_TEXT
].sh_flags
&= ~SHF_ALLOC
;
1156 size
= sections
[SECT_TEXT
]->cur_offset
;
1157 secth
[SECT_TEXT
].sh_size
= size
;
1158 file_offset
+= size
;
1161 file_offset
= ALIGN_TO (file_offset
, secth
[SECT_DYNAMIC
].sh_addralign
);
1162 virt_offset
= file_offset
;
1164 /* .dynamic, .got.plt, .data, .bss here */
1165 /* Have to increase the virt offset since these go to a separate segment */
1166 virt_offset
+= PAGESIZE
;
1167 secth
[SECT_DYNAMIC
].sh_addr
= virt_offset
;
1168 secth
[SECT_DYNAMIC
].sh_offset
= file_offset
;
1169 size
= sizeof (dynamic
);
1170 secth
[SECT_DYNAMIC
].sh_size
= size
;
1171 file_offset
+= size
;
1172 virt_offset
+= size
;
1174 file_offset
= ALIGN_TO (file_offset
, secth
[SECT_GOT_PLT
].sh_addralign
);
1175 virt_offset
= ALIGN_TO (virt_offset
, secth
[SECT_GOT_PLT
].sh_addralign
);
1176 secth
[SECT_GOT_PLT
].sh_addr
= virt_offset
;
1177 secth
[SECT_GOT_PLT
].sh_offset
= file_offset
;
1178 size
= 3 * SIZEOF_VOID_P
;
1179 secth
[SECT_GOT_PLT
].sh_size
= size
;
1180 file_offset
+= size
;
1181 virt_offset
+= size
;
1183 file_offset
= ALIGN_TO (file_offset
, secth
[SECT_DATA
].sh_addralign
);
1184 virt_offset
= ALIGN_TO (virt_offset
, secth
[SECT_DATA
].sh_addralign
);
1185 secth
[SECT_DATA
].sh_addr
= virt_offset
;
1186 secth
[SECT_DATA
].sh_offset
= file_offset
;
1187 if (sections
[SECT_DATA
]) {
1188 size
= sections
[SECT_DATA
]->cur_offset
;
1189 secth
[SECT_DATA
].sh_size
= size
;
1190 file_offset
+= size
;
1191 virt_offset
+= size
;
1194 file_offset
= ALIGN_TO (file_offset
, secth
[SECT_BSS
].sh_addralign
);
1195 virt_offset
= ALIGN_TO (virt_offset
, secth
[SECT_BSS
].sh_addralign
);
1196 secth
[SECT_BSS
].sh_addr
= virt_offset
;
1197 secth
[SECT_BSS
].sh_offset
= file_offset
;
1198 if (sections
[SECT_BSS
]) {
1199 size
= sections
[SECT_BSS
]->cur_offset
;
1200 secth
[SECT_BSS
].sh_size
= size
;
1203 /* virtual doesn't matter anymore */
1204 file_offset
= ALIGN_TO (file_offset
, secth
[SECT_DEBUG_FRAME
].sh_addralign
);
1205 secth
[SECT_DEBUG_FRAME
].sh_offset
= file_offset
;
1206 if (sections
[SECT_DEBUG_FRAME
])
1207 size
= sections
[SECT_DEBUG_FRAME
]->cur_offset
;
1210 secth
[SECT_DEBUG_FRAME
].sh_size
= size
;
1211 file_offset
+= size
;
1213 secth
[SECT_DEBUG_INFO
].sh_offset
= file_offset
;
1214 if (sections
[SECT_DEBUG_INFO
])
1215 size
= sections
[SECT_DEBUG_INFO
]->cur_offset
;
1218 secth
[SECT_DEBUG_INFO
].sh_size
= size
;
1219 file_offset
+= size
;
1221 secth
[SECT_DEBUG_ABBREV
].sh_offset
= file_offset
;
1222 if (sections
[SECT_DEBUG_ABBREV
])
1223 size
= sections
[SECT_DEBUG_ABBREV
]->cur_offset
;
1226 secth
[SECT_DEBUG_ABBREV
].sh_size
= size
;
1227 file_offset
+= size
;
1229 secth
[SECT_DEBUG_LINE
].sh_offset
= file_offset
;
1230 if (sections
[SECT_DEBUG_LINE
])
1231 size
= sections
[SECT_DEBUG_LINE
]->cur_offset
;
1234 secth
[SECT_DEBUG_LINE
].sh_size
= size
;
1235 file_offset
+= size
;
1237 secth
[SECT_DEBUG_LOC
].sh_offset
= file_offset
;
1238 if (sections
[SECT_DEBUG_LOC
])
1239 size
= sections
[SECT_DEBUG_LOC
]->cur_offset
;
1242 secth
[SECT_DEBUG_LOC
].sh_size
= size
;
1243 file_offset
+= size
;
1245 file_offset
= ALIGN_TO (file_offset
, secth
[SECT_SHSTRTAB
].sh_addralign
);
1246 secth
[SECT_SHSTRTAB
].sh_offset
= file_offset
;
1247 size
= sh_str_table
.data
->len
;
1248 secth
[SECT_SHSTRTAB
].sh_size
= size
;
1249 file_offset
+= size
;
1251 file_offset
= ALIGN_TO (file_offset
, secth
[SECT_SYMTAB
].sh_addralign
);
1252 secth
[SECT_SYMTAB
].sh_offset
= file_offset
;
1253 size
= sizeof (ElfSymbol
) * num_local_syms
;
1254 secth
[SECT_SYMTAB
].sh_size
= size
;
1255 file_offset
+= size
;
1257 file_offset
= ALIGN_TO (file_offset
, secth
[SECT_STRTAB
].sh_addralign
);
1258 secth
[SECT_STRTAB
].sh_offset
= file_offset
;
1259 size
= str_table
.data
->len
;
1260 secth
[SECT_STRTAB
].sh_size
= size
;
1261 file_offset
+= size
;
1263 for (i
= 1; i
< SECT_NUM
; ++i
) {
1264 if (section_info
[i
].esize
!= 0)
1265 g_assert (secth
[i
].sh_size
% section_info
[i
].esize
== 0);
1269 file_offset
&= ~(4-1);
1271 header
.e_ident
[EI_MAG0
] = ELFMAG0
;
1272 header
.e_ident
[EI_MAG1
] = ELFMAG1
;
1273 header
.e_ident
[EI_MAG2
] = ELFMAG2
;
1274 header
.e_ident
[EI_MAG3
] = ELFMAG3
;
1275 header
.e_ident
[EI_CLASS
] = SIZEOF_VOID_P
== 4 ? ELFCLASS32
: ELFCLASS64
;
1276 header
.e_ident
[EI_DATA
] = ELFDATA2LSB
;
1277 header
.e_ident
[EI_VERSION
] = EV_CURRENT
;
1278 header
.e_ident
[EI_OSABI
] = ELFOSABI_NONE
;
1279 header
.e_ident
[EI_ABIVERSION
] = 0;
1280 for (i
= EI_PAD
; i
< EI_NIDENT
; ++i
)
1281 header
.e_ident
[i
] = 0;
1283 header
.e_type
= ET_DYN
;
1284 #if defined(TARGET_X86)
1285 header
.e_machine
= EM_386
;
1286 #elif defined(TARGET_AMD64)
1287 header
.e_machine
= EM_X86_64
;
1288 #elif defined(TARGET_ARM)
1289 header
.e_machine
= EM_ARM
;
1291 g_assert_not_reached ();
1293 header
.e_version
= 1;
1295 header
.e_phoff
= sizeof (header
);
1296 header
.e_ehsize
= sizeof (header
);
1297 header
.e_phentsize
= sizeof (ElfProgHeader
);
1299 header
.e_entry
= secth
[SECT_TEXT
].sh_addr
;
1300 header
.e_shstrndx
= SECT_SHSTRTAB
;
1301 header
.e_shentsize
= sizeof (ElfSectHeader
);
1302 header
.e_shnum
= SECT_NUM
;
1303 header
.e_shoff
= file_offset
;
1307 dynamic
[i
].d_tag
= DT_HASH
;
1308 dynamic
[i
].d_un
.d_val
= secth
[SECT_HASH
].sh_offset
;
1310 dynamic
[i
].d_tag
= DT_STRTAB
;
1311 dynamic
[i
].d_un
.d_val
= secth
[SECT_DYNSTR
].sh_offset
;
1313 dynamic
[i
].d_tag
= DT_SYMTAB
;
1314 dynamic
[i
].d_un
.d_val
= secth
[SECT_DYNSYM
].sh_offset
;
1316 dynamic
[i
].d_tag
= DT_STRSZ
;
1317 dynamic
[i
].d_un
.d_val
= dyn_str_table
.data
->len
;
1319 dynamic
[i
].d_tag
= DT_SYMENT
;
1320 dynamic
[i
].d_un
.d_val
= sizeof (ElfSymbol
);
1323 dynamic
[i
].d_tag
= DT_RELA
;
1324 dynamic
[i
].d_un
.d_val
= secth
[SECT_RELA_DYN
].sh_offset
;
1326 dynamic
[i
].d_tag
= DT_RELASZ
;
1327 dynamic
[i
].d_un
.d_val
= secth
[SECT_RELA_DYN
].sh_size
;
1329 dynamic
[i
].d_tag
= DT_RELAENT
;
1330 dynamic
[i
].d_un
.d_val
= sizeof (ElfRelocA
);
1333 dynamic
[i
].d_tag
= DT_REL
;
1334 dynamic
[i
].d_un
.d_val
= secth
[SECT_REL_DYN
].sh_offset
;
1336 dynamic
[i
].d_tag
= DT_RELSZ
;
1337 dynamic
[i
].d_un
.d_val
= secth
[SECT_REL_DYN
].sh_size
;
1339 dynamic
[i
].d_tag
= DT_RELENT
;
1340 dynamic
[i
].d_un
.d_val
= sizeof (ElfReloc
);
1343 dynamic
[i
].d_tag
= DT_RELCOUNT
;
1344 dynamic
[i
].d_un
.d_val
= acfg
->num_relocs
;
1347 /* Program header */
1348 memset (&progh
, 0, sizeof (progh
));
1349 progh
[0].p_type
= PT_LOAD
;
1350 progh
[0].p_filesz
= progh
[0].p_memsz
= secth
[SECT_DYNAMIC
].sh_offset
;
1351 progh
[0].p_align
= 4096;
1352 progh
[0].p_flags
= 5;
1354 progh
[1].p_type
= PT_LOAD
;
1355 progh
[1].p_offset
= secth
[SECT_DYNAMIC
].sh_offset
;
1356 progh
[1].p_vaddr
= progh
[1].p_paddr
= secth
[SECT_DYNAMIC
].sh_addr
;
1357 progh
[1].p_filesz
= secth
[SECT_BSS
].sh_offset
- secth
[SECT_DYNAMIC
].sh_offset
;
1358 progh
[1].p_memsz
= secth
[SECT_BSS
].sh_addr
+ secth
[SECT_BSS
].sh_size
- secth
[SECT_DYNAMIC
].sh_addr
;
1359 progh
[1].p_align
= 4096;
1360 progh
[1].p_flags
= 6;
1362 progh
[2].p_type
= PT_DYNAMIC
;
1363 progh
[2].p_offset
= secth
[SECT_DYNAMIC
].sh_offset
;
1364 progh
[2].p_vaddr
= progh
[2].p_paddr
= secth
[SECT_DYNAMIC
].sh_addr
;
1365 progh
[2].p_filesz
= progh
[2].p_memsz
= secth
[SECT_DYNAMIC
].sh_size
;
1366 progh
[2].p_align
= SIZEOF_VOID_P
;
1367 progh
[2].p_flags
= 6;
1369 /* Compute the addresses of the bin sections, so relocation can be done */
1370 for (i
= 0; i
< SECT_NUM
; ++i
) {
1372 sections
[i
]->file_offset
= secth
[i
].sh_offset
;
1373 sections
[i
]->virt_offset
= secth
[i
].sh_addr
;
1377 reloc_symbols (acfg
, dynsym
, secth
, &dyn_str_table
, TRUE
);
1378 reloc_symbols (acfg
, symtab
, secth
, &str_table
, FALSE
);
1379 relocs
= resolve_relocations (acfg
);
1382 acfg
->out_buf_size
= file_offset
+ sizeof (secth
);
1383 acfg
->out_buf
= g_malloc (acfg
->out_buf_size
);
1386 bin_writer_fwrite (acfg
, &header
, sizeof (header
), 1);
1387 bin_writer_fwrite (acfg
, &progh
, sizeof (progh
), 1);
1388 bin_writer_fwrite (acfg
, hash
, sizeof (int) * (hash
[0] + hash
[1] + 2), 1);
1389 bin_writer_fwrite (acfg
, dynsym
, sizeof (ElfSymbol
) * hash
[1], 1);
1390 bin_writer_fwrite (acfg
, dyn_str_table
.data
->str
, dyn_str_table
.data
->len
, 1);
1392 bin_writer_fseek (acfg
, secth
[SECT_REL_DYN
].sh_offset
);
1393 bin_writer_fwrite (acfg
, relocs
, sizeof (ElfReloc
), acfg
->num_relocs
);
1396 bin_writer_fseek (acfg
, secth
[SECT_RELA_DYN
].sh_offset
);
1397 bin_writer_fwrite (acfg
, relocs
, secth
[SECT_RELA_DYN
].sh_size
, 1);
1400 if (sections
[SECT_TEXT
]) {
1401 bin_writer_fseek (acfg
, secth
[SECT_TEXT
].sh_offset
);
1402 bin_writer_fwrite (acfg
, sections
[SECT_TEXT
]->data
, sections
[SECT_TEXT
]->cur_offset
, 1);
1405 bin_writer_fwrite (acfg
, dynamic
, sizeof (dynamic
), 1);
1408 size
= secth
[SECT_DYNAMIC
].sh_addr
;
1409 bin_writer_fwrite (acfg
, &size
, sizeof (size
), 1);
1411 /* normal sections */
1412 for (i
= 0; i
< sizeof (normal_sections
) / sizeof (normal_sections
[0]); ++i
) {
1413 int sect
= normal_sections
[i
];
1414 if (sections
[sect
]) {
1415 bin_writer_fseek (acfg
, secth
[sect
].sh_offset
);
1416 bin_writer_fwrite (acfg
, sections
[sect
]->data
, sections
[sect
]->cur_offset
, 1);
1420 bin_writer_fseek (acfg
, secth
[SECT_SHSTRTAB
].sh_offset
);
1421 bin_writer_fwrite (acfg
, sh_str_table
.data
->str
, sh_str_table
.data
->len
, 1);
1422 bin_writer_fseek (acfg
, secth
[SECT_SYMTAB
].sh_offset
);
1423 bin_writer_fwrite (acfg
, symtab
, sizeof (ElfSymbol
) * num_local_syms
, 1);
1424 bin_writer_fseek (acfg
, secth
[SECT_STRTAB
].sh_offset
);
1425 bin_writer_fwrite (acfg
, str_table
.data
->str
, str_table
.data
->len
, 1);
1426 /*g_print ("file_offset %d vs %d\n", file_offset, ftell (file));*/
1427 /*g_assert (file_offset >= ftell (file));*/
1428 bin_writer_fseek (acfg
, file_offset
);
1429 bin_writer_fwrite (acfg
, §h
, sizeof (secth
), 1);
1437 #endif /* USE_ELF_WRITER */
1439 #endif /* USE_BIN_WRITER */
1444 asm_writer_emit_start (MonoImageWriter
*acfg
)
1449 asm_writer_emit_writeout (MonoImageWriter
*acfg
)
1457 asm_writer_emit_unset_mode (MonoImageWriter
*acfg
)
1459 if (acfg
->mode
== EMIT_NONE
)
1461 fprintf (acfg
->fp
, "\n");
1462 acfg
->mode
= EMIT_NONE
;
1466 asm_writer_emit_section_change (MonoImageWriter
*acfg
, const char *section_name
, int subsection_index
)
1468 asm_writer_emit_unset_mode (acfg
);
1469 #if defined(TARGET_ASM_APPLE)
1470 if (strcmp(section_name
, ".bss") == 0)
1471 fprintf (acfg
->fp
, "%s\n", ".data");
1472 else if (strstr (section_name
, ".debug") == section_name
) {
1473 //g_assert (subsection_index == 0);
1474 fprintf (acfg
->fp
, ".section __DWARF, __%s,regular,debug\n", section_name
+ 1);
1476 fprintf (acfg
->fp
, "%s\n", section_name
);
1477 #elif defined(TARGET_ARM) || defined(TARGET_POWERPC)
1478 /* ARM gas doesn't seem to like subsections of .bss */
1479 if (!strcmp (section_name
, ".text") || !strcmp (section_name
, ".data")) {
1480 fprintf (acfg
->fp
, "%s %d\n", section_name
, subsection_index
);
1482 fprintf (acfg
->fp
, ".section \"%s\"\n", section_name
);
1483 fprintf (acfg
->fp
, ".subsection %d\n", subsection_index
);
1485 #elif defined(HOST_WIN32)
1486 fprintf (acfg
->fp
, ".section %s\n", section_name
);
1488 if (!strcmp (section_name
, ".text") || !strcmp (section_name
, ".data") || !strcmp (section_name
, ".bss")) {
1489 fprintf (acfg
->fp
, "%s %d\n", section_name
, subsection_index
);
1491 fprintf (acfg
->fp
, ".section \"%s\"\n", section_name
);
1492 fprintf (acfg
->fp
, ".subsection %d\n", subsection_index
);
1498 const char *get_label (const char *s
)
1500 #ifdef TARGET_ASM_APPLE
1501 if (s
[0] == '.' && s
[1] == 'L')
1502 /* apple uses "L" instead of ".L" to mark temporary labels */
1509 asm_writer_emit_symbol_type (MonoImageWriter
*acfg
, const char *name
, gboolean func
)
1518 asm_writer_emit_unset_mode (acfg
);
1519 #if defined(TARGET_ASM_APPLE)
1521 #elif defined(TARGET_ARM)
1522 fprintf (acfg
->fp
, "\t.type %s,#%s\n", name
, stype
);
1524 fprintf (acfg
->fp
, "\t.type %s,@%s\n", name
, stype
);
1529 asm_writer_emit_global (MonoImageWriter
*acfg
, const char *name
, gboolean func
)
1531 asm_writer_emit_unset_mode (acfg
);
1532 #if (defined(__ppc__) && defined(TARGET_ASM_APPLE)) || (defined(HOST_WIN32) && !defined(MONO_CROSS_COMPILE))
1533 // mach-o always uses a '_' prefix.
1534 fprintf (acfg
->fp
, "\t.globl _%s\n", name
);
1536 fprintf (acfg
->fp
, "\t.globl %s\n", name
);
1539 asm_writer_emit_symbol_type (acfg
, name
, func
);
1543 asm_writer_emit_local_symbol (MonoImageWriter
*acfg
, const char *name
, const char *end_label
, gboolean func
)
1545 asm_writer_emit_unset_mode (acfg
);
1547 #ifndef TARGET_ASM_APPLE
1548 fprintf (acfg
->fp
, "\t.local %s\n", name
);
1551 asm_writer_emit_symbol_type (acfg
, name
, func
);
1555 asm_writer_emit_symbol_size (MonoImageWriter
*acfg
, const char *name
, const char *end_label
)
1557 asm_writer_emit_unset_mode (acfg
);
1559 #ifndef TARGET_ASM_APPLE
1560 fprintf (acfg
->fp
, "\t.size %s,%s-%s\n", name
, end_label
, name
);
1565 asm_writer_emit_label (MonoImageWriter
*acfg
, const char *name
)
1567 asm_writer_emit_unset_mode (acfg
);
1568 #if defined(HOST_WIN32) && (defined(TARGET_X86) || defined(TARGET_AMD64))
1569 fprintf (acfg
->fp
, "_%s:\n", name
);
1570 #if defined(HOST_WIN32)
1571 /* Emit a normal label too */
1572 fprintf (acfg
->fp
, "%s:\n", name
);
1575 fprintf (acfg
->fp
, "%s:\n", get_label (name
));
1581 asm_writer_emit_string (MonoImageWriter
*acfg
, const char *value
)
1583 asm_writer_emit_unset_mode (acfg
);
1584 fprintf (acfg
->fp
, "\t%s \"%s\"\n", AS_STRING_DIRECTIVE
, value
);
1588 asm_writer_emit_line (MonoImageWriter
*acfg
)
1590 asm_writer_emit_unset_mode (acfg
);
1591 fprintf (acfg
->fp
, "\n");
1595 asm_writer_emit_alignment (MonoImageWriter
*acfg
, int size
)
1597 asm_writer_emit_unset_mode (acfg
);
1598 #if defined(TARGET_ARM)
1599 fprintf (acfg
->fp
, "\t.align %d\n", ilog2 (size
));
1600 #elif defined(__ppc__) && defined(TARGET_ASM_APPLE)
1601 // the mach-o assembler specifies alignments as powers of 2.
1602 fprintf (acfg
->fp
, "\t.align %d\t; ilog2\n", ilog2(size
));
1603 #elif defined(TARGET_ASM_GAS)
1604 fprintf (acfg
->fp
, "\t.balign %d\n", size
);
1606 fprintf (acfg
->fp
, "\t.align %d\n", size
);
1611 asm_writer_emit_pointer_unaligned (MonoImageWriter
*acfg
, const char *target
)
1613 asm_writer_emit_unset_mode (acfg
);
1614 fprintf (acfg
->fp
, "\t%s %s\n", AS_POINTER_DIRECTIVE
, target
? target
: "0");
1618 asm_writer_emit_pointer (MonoImageWriter
*acfg
, const char *target
)
1620 asm_writer_emit_unset_mode (acfg
);
1621 asm_writer_emit_alignment (acfg
, sizeof (gpointer
));
1622 asm_writer_emit_pointer_unaligned (acfg
, target
);
1625 static char *byte_to_str
;
1628 asm_writer_emit_bytes (MonoImageWriter
*acfg
, const guint8
* buf
, int size
)
1631 if (acfg
->mode
!= EMIT_BYTE
) {
1632 acfg
->mode
= EMIT_BYTE
;
1633 acfg
->col_count
= 0;
1636 if (byte_to_str
== NULL
) {
1637 byte_to_str
= g_new0 (char, 256 * 8);
1638 for (i
= 0; i
< 256; ++i
) {
1639 sprintf (byte_to_str
+ (i
* 8), ",%d", i
);
1643 for (i
= 0; i
< size
; ++i
, ++acfg
->col_count
) {
1644 if ((acfg
->col_count
% 32) == 0)
1645 fprintf (acfg
->fp
, "\n\t.byte %d", buf
[i
]);
1647 fputs (byte_to_str
+ (buf
[i
] * 8), acfg
->fp
);
1652 asm_writer_emit_int16 (MonoImageWriter
*acfg
, int value
)
1654 if (acfg
->mode
!= EMIT_WORD
) {
1655 acfg
->mode
= EMIT_WORD
;
1656 acfg
->col_count
= 0;
1658 if ((acfg
->col_count
++ % 8) == 0)
1659 fprintf (acfg
->fp
, "\n\t%s ", AS_INT16_DIRECTIVE
);
1661 fprintf (acfg
->fp
, ", ");
1662 fprintf (acfg
->fp
, "%d", value
);
1666 asm_writer_emit_int32 (MonoImageWriter
*acfg
, int value
)
1668 if (acfg
->mode
!= EMIT_LONG
) {
1669 acfg
->mode
= EMIT_LONG
;
1670 acfg
->col_count
= 0;
1672 if ((acfg
->col_count
++ % 8) == 0)
1673 fprintf (acfg
->fp
, "\n\t%s ", AS_INT32_DIRECTIVE
);
1675 fprintf (acfg
->fp
, ",");
1676 fprintf (acfg
->fp
, "%d", value
);
1680 asm_writer_emit_symbol_diff (MonoImageWriter
*acfg
, const char *end
, const char* start
, int offset
)
1682 #ifdef TARGET_ASM_APPLE
1686 if (acfg
->mode
!= EMIT_LONG
) {
1687 acfg
->mode
= EMIT_LONG
;
1688 acfg
->col_count
= 0;
1691 // FIXME: This doesn't seem to work on the iphone
1693 //#ifdef TARGET_ASM_APPLE
1694 /* The apple assembler needs a separate symbol to be able to handle complex expressions */
1695 sprintf (symbol
, "LTMP_SYM%d", acfg
->label_gen
);
1696 start
= get_label (start
);
1697 end
= get_label (end
);
1700 fprintf (acfg
->fp
, "\n%s=%s - %s + %d", symbol
, end
, start
, offset
);
1701 else if (offset
< 0)
1702 fprintf (acfg
->fp
, "\n%s=%s - %s %d", symbol
, end
, start
, offset
);
1704 fprintf (acfg
->fp
, "\n%s=%s - %s", symbol
, end
, start
);
1706 fprintf (acfg
->fp
, "\n\t%s ", AS_INT32_DIRECTIVE
);
1707 fprintf (acfg
->fp
, "%s", symbol
);
1709 start
= get_label (start
);
1710 end
= get_label (end
);
1711 if ((acfg
->col_count
++ % 8) == 0)
1712 fprintf (acfg
->fp
, "\n\t%s ", AS_INT32_DIRECTIVE
);
1714 fprintf (acfg
->fp
, ",");
1716 fprintf (acfg
->fp
, "%s - %s + %d", end
, start
, offset
);
1717 else if (offset
< 0)
1718 fprintf (acfg
->fp
, "%s - %s %d", end
, start
, offset
);
1720 fprintf (acfg
->fp
, "%s - %s", end
, start
);
1725 asm_writer_emit_zero_bytes (MonoImageWriter
*acfg
, int num
)
1727 asm_writer_emit_unset_mode (acfg
);
1728 fprintf (acfg
->fp
, "\t%s %d\n", AS_SKIP_DIRECTIVE
, num
);
1731 /* EMIT FUNCTIONS */
1734 img_writer_emit_start (MonoImageWriter
*acfg
)
1736 #ifdef USE_BIN_WRITER
1737 if (acfg
->use_bin_writer
)
1738 bin_writer_emit_start (acfg
);
1740 asm_writer_emit_start (acfg
);
1742 asm_writer_emit_start (acfg
);
1747 img_writer_emit_section_change (MonoImageWriter
*acfg
, const char *section_name
, int subsection_index
)
1749 #ifdef USE_BIN_WRITER
1750 if (acfg
->use_bin_writer
)
1751 bin_writer_emit_section_change (acfg
, section_name
, subsection_index
);
1753 asm_writer_emit_section_change (acfg
, section_name
, subsection_index
);
1755 asm_writer_emit_section_change (acfg
, section_name
, subsection_index
);
1758 acfg
->current_section
= section_name
;
1759 acfg
->current_subsection
= subsection_index
;
1763 img_writer_emit_push_section (MonoImageWriter
*acfg
, const char *section_name
, int subsection
)
1765 g_assert (acfg
->stack_pos
< 16 - 1);
1766 acfg
->section_stack
[acfg
->stack_pos
] = acfg
->current_section
;
1767 acfg
->subsection_stack
[acfg
->stack_pos
] = acfg
->current_subsection
;
1770 img_writer_emit_section_change (acfg
, section_name
, subsection
);
1774 img_writer_emit_pop_section (MonoImageWriter
*acfg
)
1776 g_assert (acfg
->stack_pos
> 0);
1778 img_writer_emit_section_change (acfg
, acfg
->section_stack
[acfg
->stack_pos
], acfg
->subsection_stack
[acfg
->stack_pos
]);
1782 img_writer_set_section_addr (MonoImageWriter
*acfg
, guint64 addr
)
1784 #ifdef USE_BIN_WRITER
1785 if (!acfg
->use_bin_writer
)
1788 bin_writer_set_section_addr (acfg
, addr
);
1795 img_writer_emit_global (MonoImageWriter
*acfg
, const char *name
, gboolean func
)
1797 #ifdef USE_BIN_WRITER
1798 if (acfg
->use_bin_writer
)
1799 bin_writer_emit_global (acfg
, name
, func
);
1801 asm_writer_emit_global (acfg
, name
, func
);
1803 asm_writer_emit_global (acfg
, name
, func
);
1808 img_writer_emit_local_symbol (MonoImageWriter
*acfg
, const char *name
, const char *end_label
, gboolean func
)
1810 #ifdef USE_BIN_WRITER
1811 if (acfg
->use_bin_writer
)
1812 bin_writer_emit_local_symbol (acfg
, name
, end_label
, func
);
1814 asm_writer_emit_local_symbol (acfg
, name
, end_label
, func
);
1816 asm_writer_emit_local_symbol (acfg
, name
, end_label
, func
);
1821 img_writer_emit_symbol_size (MonoImageWriter
*acfg
, const char *name
, const char *end_label
)
1823 if (!acfg
->use_bin_writer
)
1824 asm_writer_emit_symbol_size (acfg
, name
, end_label
);
1828 img_writer_emit_label (MonoImageWriter
*acfg
, const char *name
)
1830 #ifdef USE_BIN_WRITER
1831 if (acfg
->use_bin_writer
)
1832 bin_writer_emit_label (acfg
, name
);
1834 asm_writer_emit_label (acfg
, name
);
1836 asm_writer_emit_label (acfg
, name
);
1841 img_writer_emit_bytes (MonoImageWriter
*acfg
, const guint8
* buf
, int size
)
1843 #ifdef USE_BIN_WRITER
1844 if (acfg
->use_bin_writer
)
1845 bin_writer_emit_bytes (acfg
, buf
, size
);
1847 asm_writer_emit_bytes (acfg
, buf
, size
);
1849 asm_writer_emit_bytes (acfg
, buf
, size
);
1854 img_writer_emit_string (MonoImageWriter
*acfg
, const char *value
)
1856 #ifdef USE_BIN_WRITER
1857 if (acfg
->use_bin_writer
)
1858 bin_writer_emit_string (acfg
, value
);
1860 asm_writer_emit_string (acfg
, value
);
1862 asm_writer_emit_string (acfg
, value
);
1867 img_writer_emit_line (MonoImageWriter
*acfg
)
1869 #ifdef USE_BIN_WRITER
1870 if (acfg
->use_bin_writer
)
1871 bin_writer_emit_line (acfg
);
1873 asm_writer_emit_line (acfg
);
1875 asm_writer_emit_line (acfg
);
1880 img_writer_emit_alignment (MonoImageWriter
*acfg
, int size
)
1882 #ifdef USE_BIN_WRITER
1883 if (acfg
->use_bin_writer
)
1884 bin_writer_emit_alignment (acfg
, size
);
1886 asm_writer_emit_alignment (acfg
, size
);
1888 asm_writer_emit_alignment (acfg
, size
);
1893 img_writer_emit_pointer_unaligned (MonoImageWriter
*acfg
, const char *target
)
1895 #ifdef USE_BIN_WRITER
1896 if (acfg
->use_bin_writer
)
1897 bin_writer_emit_pointer_unaligned (acfg
, target
);
1899 asm_writer_emit_pointer_unaligned (acfg
, target
);
1901 asm_writer_emit_pointer_unaligned (acfg
, target
);
1906 img_writer_emit_pointer (MonoImageWriter
*acfg
, const char *target
)
1908 #ifdef USE_BIN_WRITER
1909 if (acfg
->use_bin_writer
)
1910 bin_writer_emit_pointer (acfg
, target
);
1912 asm_writer_emit_pointer (acfg
, target
);
1914 asm_writer_emit_pointer (acfg
, target
);
1919 img_writer_emit_int16 (MonoImageWriter
*acfg
, int value
)
1921 #ifdef USE_BIN_WRITER
1922 if (acfg
->use_bin_writer
)
1923 bin_writer_emit_int16 (acfg
, value
);
1925 asm_writer_emit_int16 (acfg
, value
);
1927 asm_writer_emit_int16 (acfg
, value
);
1932 img_writer_emit_int32 (MonoImageWriter
*acfg
, int value
)
1934 #ifdef USE_BIN_WRITER
1935 if (acfg
->use_bin_writer
)
1936 bin_writer_emit_int32 (acfg
, value
);
1938 asm_writer_emit_int32 (acfg
, value
);
1940 asm_writer_emit_int32 (acfg
, value
);
1945 img_writer_emit_symbol_diff (MonoImageWriter
*acfg
, const char *end
, const char* start
, int offset
)
1947 #ifdef USE_BIN_WRITER
1948 if (acfg
->use_bin_writer
)
1949 bin_writer_emit_symbol_diff (acfg
, end
, start
, offset
);
1951 asm_writer_emit_symbol_diff (acfg
, end
, start
, offset
);
1953 asm_writer_emit_symbol_diff (acfg
, end
, start
, offset
);
1958 img_writer_emit_zero_bytes (MonoImageWriter
*acfg
, int num
)
1960 #ifdef USE_BIN_WRITER
1961 if (acfg
->use_bin_writer
)
1962 bin_writer_emit_zero_bytes (acfg
, num
);
1964 asm_writer_emit_zero_bytes (acfg
, num
);
1966 asm_writer_emit_zero_bytes (acfg
, num
);
1971 img_writer_emit_writeout (MonoImageWriter
*acfg
)
1973 #ifdef USE_BIN_WRITER
1974 if (acfg
->use_bin_writer
)
1975 return bin_writer_emit_writeout (acfg
);
1977 return asm_writer_emit_writeout (acfg
);
1979 return asm_writer_emit_writeout (acfg
);
1984 img_writer_emit_byte (MonoImageWriter
*acfg
, guint8 val
)
1986 img_writer_emit_bytes (acfg
, &val
, 1);
1990 * Emit a relocation entry of type RELOC_TYPE against symbol SYMBOL at the current PC.
1991 * Do not advance PC.
1994 img_writer_emit_reloc (MonoImageWriter
*acfg
, int reloc_type
, const char *symbol
, int addend
)
1996 /* This is only supported by the bin writer */
1997 #ifdef USE_BIN_WRITER
1998 if (acfg
->use_bin_writer
)
1999 bin_writer_emit_reloc (acfg
, reloc_type
, symbol
, addend
);
2001 g_assert_not_reached ();
2003 g_assert_not_reached ();
2008 * img_writer_emit_unset_mode:
2010 * Flush buffered data so it is safe to write to the output file from outside this
2011 * module. This is a nop for the binary writer.
2014 img_writer_emit_unset_mode (MonoImageWriter
*acfg
)
2016 if (!acfg
->use_bin_writer
)
2017 asm_writer_emit_unset_mode (acfg
);
2021 * img_writer_get_output:
2023 * Return the output buffer of a binary writer emitting to memory. The returned memory
2024 * is from malloc, and it is owned by the caller.
2027 img_writer_get_output (MonoImageWriter
*acfg
, guint32
*size
)
2029 #ifdef USE_BIN_WRITER
2032 g_assert (acfg
->use_bin_writer
);
2034 buf
= acfg
->out_buf
;
2035 *size
= acfg
->out_buf_size
;
2036 acfg
->out_buf
= NULL
;
2039 g_assert_not_reached ();
2045 * Return whenever the binary writer is supported on this platform.
2048 bin_writer_supported (void)
2050 #ifdef USE_BIN_WRITER
2058 * img_writer_create:
2060 * Create an image writer writing to FP. If USE_BIN_WRITER is TRUE, FP can be NULL,
2061 * in this case the image writer will write to a memory buffer obtainable by calling
2062 * img_writer_get_output ().
2065 img_writer_create (FILE *fp
, gboolean use_bin_writer
)
2067 MonoImageWriter
*w
= g_new0 (MonoImageWriter
, 1);
2069 #ifndef USE_BIN_WRITER
2070 g_assert (!use_bin_writer
);
2073 if (!use_bin_writer
)
2077 w
->use_bin_writer
= use_bin_writer
;
2078 w
->mempool
= mono_mempool_new ();
2084 img_writer_destroy (MonoImageWriter
*w
)
2086 // FIXME: Free all the stuff
2087 mono_mempool_destroy (w
->mempool
);
2092 img_writer_subsections_supported (MonoImageWriter
*acfg
)
2094 #ifdef TARGET_ASM_APPLE
2095 return acfg
->use_bin_writer
;
2102 img_writer_get_fp (MonoImageWriter
*acfg
)
2108 img_writer_get_temp_label_prefix (MonoImageWriter
*acfg
)
2110 return AS_TEMP_LABEL_PREFIX
;