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>
23 #ifndef PLATFORM_WIN32
32 #include <limits.h> /* for PAGESIZE */
37 #include "image-writer.h"
39 #ifndef PLATFORM_WIN32
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 #define SHARED_EXT ".dll"
52 #elif defined(__ppc__) && defined(__MACH__)
53 #define SHARED_EXT ".dylib"
55 #define SHARED_EXT ".so"
58 #if defined(sparc) || defined(__ppc__) || defined(__powerpc__) || defined(__MACH__)
59 #define AS_STRING_DIRECTIVE ".asciz"
62 #define AS_STRING_DIRECTIVE ".string"
67 // .byte generates 1 byte per expression.
68 // .short generates 2 bytes per expression.
69 // .long generates 4 bytes per expression.
70 // .quad generates 8 bytes per expression.
72 #define ALIGN_TO(val,align) ((((guint64)val) + ((align) - 1)) & ~((align) - 1))
73 #define ALIGN_PTR_TO(ptr,align) (gpointer)((((gssize)(ptr)) + (align - 1)) & (~(align - 1)))
74 #define ROUND_DOWN(VALUE,SIZE) ((VALUE) & ~((SIZE) - 1))
76 #if defined(__x86_64__) && !defined(PLATFORM_WIN32)
77 #define USE_ELF_WRITER 1
78 #define USE_ELF_RELA 1
81 #if defined(__i386__) && !defined(PLATFORM_WIN32)
82 #define USE_ELF_WRITER 1
85 #if defined(__arm__) && !defined(__MACH__)
86 #define USE_ELF_WRITER 1
90 #define USE_ELF_WRITER 1
93 #if defined(USE_ELF_WRITER)
94 #define USE_BIN_WRITER 1
99 typedef struct _BinSymbol BinSymbol;
100 typedef struct _BinReloc BinReloc;
101 typedef struct _BinSection BinSection;
113 struct _MonoImageWriter {
114 MonoMemPool *mempool;
116 gboolean use_bin_writer;
117 const char *current_section;
118 int current_subsection;
119 const char *section_stack [16];
120 int subsection_stack [16];
124 #ifdef USE_BIN_WRITER
126 BinSection *sections;
127 BinSection *cur_section;
128 BinReloc *relocations;
134 int mode; /* emit mode */
135 int col_count; /* bytes emitted per .byte line */
138 static G_GNUC_UNUSED int
139 ilog2(register int value)
142 while (value & ~0xf) count += 4, value >>= 4;
143 while (value) count++, value >>= 1;
147 #ifdef USE_BIN_WRITER
149 typedef struct _BinLabel BinLabel;
160 BinSection *val2_section;
173 gboolean is_function;
192 bin_writer_emit_start (MonoImageWriter *acfg)
194 acfg->labels = g_hash_table_new (g_str_hash, g_str_equal);
198 bin_writer_emit_section_change (MonoImageWriter *acfg, const char *section_name, int subsection_index)
202 if (acfg->cur_section && acfg->cur_section->subsection == subsection_index
203 && strcmp (acfg->cur_section->name, section_name) == 0)
205 for (section = acfg->sections; section; section = section->next) {
206 if (section->subsection == subsection_index && strcmp (section->name, section_name) == 0) {
207 acfg->cur_section = section;
212 section = g_new0 (BinSection, 1);
213 section->name = g_strdup (section_name);
214 section->subsection = subsection_index;
215 section->next = acfg->sections;
216 acfg->sections = section;
217 acfg->cur_section = section;
222 bin_writer_emit_symbol_inner (MonoImageWriter *acfg, const char *name, const char *end_label, gboolean is_global, gboolean func)
224 BinSymbol *symbol = g_new0 (BinSymbol, 1);
225 symbol->name = g_strdup (name);
227 symbol->end_label = g_strdup (end_label);
228 symbol->is_function = func;
229 symbol->is_global = is_global;
230 symbol->section = acfg->cur_section;
231 /* FIXME: we align after this call... */
232 symbol->offset = symbol->section->cur_offset;
233 symbol->next = acfg->symbols;
234 acfg->symbols = symbol;
238 bin_writer_emit_global (MonoImageWriter *acfg, const char *name, gboolean func)
240 bin_writer_emit_symbol_inner (acfg, name, NULL, TRUE, func);
244 bin_writer_emit_local_symbol (MonoImageWriter *acfg, const char *name, const char *end_label, gboolean func)
246 bin_writer_emit_symbol_inner (acfg, name, end_label, FALSE, func);
250 bin_writer_emit_label (MonoImageWriter *acfg, const char *name)
252 BinLabel *label = g_new0 (BinLabel, 1);
253 label->name = g_strdup (name);
254 label->section = acfg->cur_section;
255 label->offset = acfg->cur_section->cur_offset;
256 g_hash_table_insert (acfg->labels, label->name, label);
260 bin_writer_emit_ensure_buffer (BinSection *section, int size)
262 int new_offset = section->cur_offset + size;
263 if (new_offset >= section->data_len) {
264 int new_size = section->data_len? section->data_len * 2: 256;
266 while (new_size <= new_offset)
268 data = g_malloc0 (new_size);
269 memcpy (data, section->data, section->data_len);
270 g_free (section->data);
271 section->data = data;
272 section->data_len = new_size;
277 bin_writer_emit_bytes (MonoImageWriter *acfg, const guint8* buf, int size)
279 bin_writer_emit_ensure_buffer (acfg->cur_section, size);
280 memcpy (acfg->cur_section->data + acfg->cur_section->cur_offset, buf, size);
281 acfg->cur_section->cur_offset += size;
285 bin_writer_emit_string (MonoImageWriter *acfg, const char *value)
287 int size = strlen (value) + 1;
288 bin_writer_emit_bytes (acfg, (const guint8*)value, size);
292 bin_writer_emit_line (MonoImageWriter *acfg)
294 /* Nothing to do in binary writer */
298 bin_writer_emit_alignment (MonoImageWriter *acfg, int size)
300 int offset = acfg->cur_section->cur_offset;
302 offset += (size - 1);
303 offset &= ~(size - 1);
304 add = offset - acfg->cur_section->cur_offset;
306 bin_writer_emit_ensure_buffer (acfg->cur_section, add);
307 acfg->cur_section->cur_offset += add;
312 bin_writer_emit_pointer_unaligned (MonoImageWriter *acfg, const char *target)
318 g_assert_not_reached ();
319 reloc = g_new0 (BinReloc, 1);
320 reloc->val1 = g_strdup (target);
321 reloc->section = acfg->cur_section;
322 reloc->section_offset = acfg->cur_section->cur_offset;
323 reloc->next = acfg->relocations;
324 acfg->relocations = reloc;
325 if (strcmp (reloc->section->name, ".data") == 0) {
327 //g_print ("reloc: %s at %d\n", target, acfg->cur_section->cur_offset);
329 acfg->cur_section->cur_offset += sizeof (gpointer);
333 bin_writer_emit_pointer (MonoImageWriter *acfg, const char *target)
335 bin_writer_emit_alignment (acfg, sizeof (gpointer));
336 bin_writer_emit_pointer_unaligned (acfg, target);
340 bin_writer_emit_int16 (MonoImageWriter *acfg, int value)
343 bin_writer_emit_ensure_buffer (acfg->cur_section, 2);
344 data = acfg->cur_section->data + acfg->cur_section->cur_offset;
345 acfg->cur_section->cur_offset += 2;
346 /* FIXME: little endian */
348 data [1] = value >> 8;
352 bin_writer_emit_int32 (MonoImageWriter *acfg, int value)
355 bin_writer_emit_ensure_buffer (acfg->cur_section, 4);
356 data = acfg->cur_section->data + acfg->cur_section->cur_offset;
357 acfg->cur_section->cur_offset += 4;
358 /* FIXME: little endian */
360 data [1] = value >> 8;
361 data [2] = value >> 16;
362 data [3] = value >> 24;
366 create_reloc (MonoImageWriter *acfg, const char *end, const char* start, int offset)
369 reloc = mono_mempool_alloc0 (acfg->mempool, sizeof (BinReloc));
370 reloc->val1 = mono_mempool_strdup (acfg->mempool, end);
371 if (strcmp (start, ".") == 0) {
372 reloc->val2_section = acfg->cur_section;
373 reloc->val2_offset = acfg->cur_section->cur_offset;
375 reloc->val2 = mono_mempool_strdup (acfg->mempool, start);
377 reloc->offset = offset;
378 reloc->section = acfg->cur_section;
379 reloc->section_offset = acfg->cur_section->cur_offset;
380 reloc->next = acfg->relocations;
381 acfg->relocations = reloc;
386 bin_writer_emit_symbol_diff (MonoImageWriter *acfg, const char *end, const char* start, int offset)
388 create_reloc (acfg, end, start, offset);
389 acfg->cur_section->cur_offset += 4;
390 /*if (strcmp (reloc->section->name, ".data") == 0) {
392 g_print ("reloc: %s - %s + %d at %d\n", end, start, offset, acfg->cur_section->cur_offset - 4);
397 * Emit a relocation entry of type RELOC_TYPE against symbol SYMBOL at the current PC.
400 static G_GNUC_UNUSED void
401 bin_writer_emit_reloc (MonoImageWriter *acfg, int reloc_type, const char *symbol, int addend)
403 BinReloc *reloc = create_reloc (acfg, symbol, ".", addend);
404 reloc->reloc_type = reloc_type;
408 bin_writer_emit_zero_bytes (MonoImageWriter *acfg, int num)
410 bin_writer_emit_ensure_buffer (acfg->cur_section, num);
411 acfg->cur_section->cur_offset += num;
414 #ifdef USE_ELF_WRITER
439 #if SIZEOF_VOID_P == 4
441 typedef Elf32_Ehdr ElfHeader;
442 typedef Elf32_Shdr ElfSectHeader;
443 typedef Elf32_Phdr ElfProgHeader;
444 typedef Elf32_Sym ElfSymbol;
445 typedef Elf32_Rel ElfReloc;
446 typedef Elf32_Rela ElfRelocA;
447 typedef Elf32_Dyn ElfDynamic;
451 typedef Elf64_Ehdr ElfHeader;
452 typedef Elf64_Shdr ElfSectHeader;
453 typedef Elf64_Phdr ElfProgHeader;
454 typedef Elf64_Sym ElfSymbol;
455 typedef Elf64_Rel ElfReloc;
456 typedef Elf64_Rela ElfRelocA;
457 typedef Elf64_Dyn ElfDynamic;
469 static SectInfo section_info [] = {
471 {".hash", SHT_HASH, 4, 2, SIZEOF_VOID_P},
472 {".dynsym", SHT_DYNSYM, sizeof (ElfSymbol), 2, SIZEOF_VOID_P},
473 {".dynstr", SHT_STRTAB, 0, 2, 1},
474 {".rel.dyn", SHT_REL, sizeof (ElfReloc), 2, SIZEOF_VOID_P},
475 {".rela.dyn", SHT_RELA, sizeof (ElfRelocA), 2, SIZEOF_VOID_P},
476 {".text", SHT_PROGBITS, 0, 6, 4096},
477 {".dynamic", SHT_DYNAMIC, sizeof (ElfDynamic), 3, SIZEOF_VOID_P},
478 {".got.plt", SHT_PROGBITS, SIZEOF_VOID_P, 3, SIZEOF_VOID_P},
479 {".data", SHT_PROGBITS, 0, 3, 8},
480 {".bss", SHT_NOBITS, 0, 3, 8},
481 {".debug_frame", SHT_PROGBITS, 0, 0, 8},
482 {".debug_info", SHT_PROGBITS, 0, 0, 1},
483 {".debug_abbrev", SHT_PROGBITS, 0, 0, 1},
484 {".debug_line", SHT_PROGBITS, 0, 0, 1},
485 {".debug_loc", SHT_PROGBITS, 0, 0, 1},
486 {".shstrtab", SHT_STRTAB, 0, 0, 1},
487 {".symtab", SHT_SYMTAB, sizeof (ElfSymbol), 0, SIZEOF_VOID_P},
488 {".strtab", SHT_STRTAB, 0, 0, 1}
497 str_table_add (ElfStrTable *table, const char* value)
501 table->data = g_string_new_len ("", 1);
502 table->hash = g_hash_table_new (g_str_hash, g_str_equal);
504 idx = GPOINTER_TO_UINT (g_hash_table_lookup (table->hash, value));
507 idx = table->data->len;
508 g_string_append (table->data, value);
509 g_string_append_c (table->data, 0);
510 g_hash_table_insert (table->hash, (void*)value, GUINT_TO_POINTER (idx));
515 append_subsection (MonoImageWriter *acfg, ElfSectHeader *sheaders, BinSection *sect, BinSection *add)
517 int offset = sect->cur_offset;
518 /*offset += (sheaders [sect->shidx].sh_addralign - 1);
519 offset &= ~(sheaders [sect->shidx].sh_addralign - 1);*/
522 bin_writer_emit_ensure_buffer (sect, offset);
523 //g_print ("section %s aligned to %d from %d\n", sect->name, offset, sect->cur_offset);
524 sect->cur_offset = offset;
526 bin_writer_emit_ensure_buffer (sect, add->cur_offset);
527 memcpy (sect->data + sect->cur_offset, add->data, add->cur_offset);
529 sect->cur_offset += add->cur_offset;
530 add->cur_offset = offset; /* it becomes the offset in the parent section */
531 //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);
536 /* merge the subsections */
538 collect_sections (MonoImageWriter *acfg, ElfSectHeader *sheaders, BinSection **out, int num)
540 int i, j, maxs, num_sections;
545 for (sect = acfg->sections; sect; sect = sect->next) {
546 if (sect->subsection == 0) {
547 out [num_sections++] = sect;
548 g_assert (num_sections < num);
550 maxs = MAX (maxs, sect->subsection);
552 for (i = 0; i < num_sections; i++) {
553 for (j = 1; j <= maxs; ++j) {
554 for (sect = acfg->sections; sect; sect = sect->next) {
555 if (sect->subsection == j && strcmp (out [i]->name, sect->name) == 0) {
556 append_subsection (acfg, sheaders, out [i], sect);
565 elf_hash (const unsigned char *name)
567 unsigned long h = 0, g;
569 h = (h << 4) + *name++;
570 if ((g = h & 0xf0000000))
577 #define NUM_BUCKETS 17
580 build_hash (MonoImageWriter *acfg, int num_sections, ElfStrTable *dynstr)
583 int num_symbols = 1 + num_sections + 3;
586 for (symbol = acfg->symbols; symbol; symbol = symbol->next) {
587 if (!symbol->is_global)
590 str_table_add (dynstr, symbol->name);
591 /*g_print ("adding sym: %s\n", symbol->name);*/
593 str_table_add (dynstr, "__bss_start");
594 str_table_add (dynstr, "_edata");
595 str_table_add (dynstr, "_end");
597 data = g_new0 (int, num_symbols + 2 + NUM_BUCKETS);
598 data [0] = NUM_BUCKETS;
599 data [1] = num_symbols;
605 get_label_addr (MonoImageWriter *acfg, const char *name)
612 lab = g_hash_table_lookup (acfg->labels, name);
614 g_error ("Undefined label: '%s'.\n", name);
615 section = lab->section;
616 offset = lab->offset;
617 if (section->parent) {
618 value = section->parent->virt_offset + section->cur_offset + offset;
620 value = section->virt_offset + offset;
626 collect_syms (MonoImageWriter *acfg, int *hash, ElfStrTable *strtab, ElfSectHeader *sheaders, int *num_syms)
637 symbols = g_new0 (ElfSymbol, hash [1]);
640 for (symbol = acfg->symbols; symbol; symbol = symbol->next)
643 symbols = g_new0 (ElfSymbol, i + SECT_NUM + 10); /* FIXME */
646 /* the first symbol is undef, all zeroes */
650 for (j = 1; j < SECT_NUM; ++j) {
651 symbols [i].st_info = ELF32_ST_INFO (STB_LOCAL, STT_SECTION);
652 symbols [i].st_shndx = j;
653 symbols [i].st_value = sheaders [j].sh_addr;
657 for (section = acfg->sections; section; section = section->next) {
660 symbols [i].st_info = ELF32_ST_INFO (STB_LOCAL, STT_SECTION);
661 if (strcmp (section->name, ".text") == 0) {
662 symbols [i].st_shndx = SECT_TEXT;
663 section->shidx = SECT_TEXT;
664 section->file_offset = 4096;
665 symbols [i].st_value = section->virt_offset;
666 } else if (strcmp (section->name, ".data") == 0) {
667 symbols [i].st_shndx = SECT_DATA;
668 section->shidx = SECT_DATA;
669 section->file_offset = 4096 + 28; /* FIXME */
670 symbols [i].st_value = section->virt_offset;
671 } else if (strcmp (section->name, ".bss") == 0) {
672 symbols [i].st_shndx = SECT_BSS;
673 section->shidx = SECT_BSS;
674 section->file_offset = 4096 + 28 + 8; /* FIXME */
675 symbols [i].st_value = section->virt_offset;
680 for (symbol = acfg->symbols; symbol; symbol = symbol->next) {
683 if (!symbol->is_global && hash)
685 symbols [i].st_info = ELF32_ST_INFO (symbol->is_global ? STB_GLOBAL : STB_LOCAL, symbol->is_function? STT_FUNC : STT_OBJECT);
686 symbols [i].st_name = str_table_add (strtab, symbol->name);
687 /*g_print ("sym name %s tabled to %d\n", symbol->name, symbols [i].st_name);*/
688 section = symbol->section;
689 symbols [i].st_shndx = section->parent? section->parent->shidx: section->shidx;
690 lab = g_hash_table_lookup (acfg->labels, symbol->name);
691 offset = lab->offset;
692 if (section->parent) {
693 symbols [i].st_value = section->parent->virt_offset + section->cur_offset + offset;
695 symbols [i].st_value = section->virt_offset + offset;
698 if (symbol->end_label) {
699 BinLabel *elab = g_hash_table_lookup (acfg->labels, symbol->end_label);
701 symbols [i].st_size = elab->offset - lab->offset;
705 /* add special symbols */
706 symbols [i].st_name = str_table_add (strtab, "__bss_start");
707 symbols [i].st_shndx = 0xfff1;
708 symbols [i].st_info = ELF32_ST_INFO (STB_GLOBAL, 0);
710 symbols [i].st_name = str_table_add (strtab, "_edata");
711 symbols [i].st_shndx = 0xfff1;
712 symbols [i].st_info = ELF32_ST_INFO (STB_GLOBAL, 0);
714 symbols [i].st_name = str_table_add (strtab, "_end");
715 symbols [i].st_shndx = 0xfff1;
716 symbols [i].st_info = ELF32_ST_INFO (STB_GLOBAL, 0);
722 /* add to hash table */
725 chain = hash + 2 + hash [0];
726 for (i = 0; i < hash [1]; ++i) {
728 /*g_print ("checking %d '%s' (sym %d)\n", symbols [i].st_name, strtab->data->str + symbols [i].st_name, i);*/
729 if (!symbols [i].st_name)
731 hashc = elf_hash ((guint8*)strtab->data->str + symbols [i].st_name);
732 slot = hashc % hash [0];
733 /*g_print ("hashing '%s' at slot %d (sym %d)\n", strtab->data->str + symbols [i].st_name, slot, i);*/
735 chain [i] = bucket [slot];
746 reloc_symbols (MonoImageWriter *acfg, ElfSymbol *symbols, ElfSectHeader *sheaders, ElfStrTable *strtab, gboolean dynamic)
754 for (section = acfg->sections; section; section = section->next) {
757 symbols [i].st_value = sheaders [section->shidx].sh_addr;
761 for (i = 1; i < SECT_NUM; ++i) {
762 symbols [i].st_value = sheaders [i].sh_addr;
765 for (symbol = acfg->symbols; symbol; symbol = symbol->next) {
768 if (dynamic && !symbol->is_global)
770 section = symbol->section;
771 lab = g_hash_table_lookup (acfg->labels, symbol->name);
772 offset = lab->offset;
773 if (section->parent) {
774 symbols [i].st_value = sheaders [section->parent->shidx].sh_addr + section->cur_offset + offset;
776 symbols [i].st_value = sheaders [section->shidx].sh_addr + offset;
781 symbols [i].st_value = sheaders [SECT_BSS].sh_addr;
784 symbols [i].st_value = sheaders [SECT_DATA].sh_addr + sheaders [SECT_DATA].sh_size;
787 symbols [i].st_value = sheaders [SECT_BSS].sh_addr + sheaders [SECT_BSS].sh_size;
792 resolve_reloc (MonoImageWriter *acfg, BinReloc *reloc, guint8 **out_data, gsize *out_vaddr, gsize *out_start_val, gsize *out_end_val)
795 gssize end_val, start_val;
798 end_val = get_label_addr (acfg, reloc->val1);
800 start_val = get_label_addr (acfg, reloc->val2);
801 } else if (reloc->val2_section) {
802 start_val = reloc->val2_offset;
803 if (reloc->val2_section->parent)
804 start_val += reloc->val2_section->parent->virt_offset + reloc->val2_section->cur_offset;
806 start_val += reloc->val2_section->virt_offset;
810 end_val = end_val - start_val + reloc->offset;
811 if (reloc->section->parent) {
812 data = reloc->section->parent->data;
813 data += reloc->section->cur_offset;
814 data += reloc->section_offset;
815 vaddr = reloc->section->parent->virt_offset;
816 vaddr += reloc->section->cur_offset;
817 vaddr += reloc->section_offset;
819 data = reloc->section->data;
820 data += reloc->section_offset;
821 vaddr = reloc->section->virt_offset;
822 vaddr += reloc->section_offset;
825 *out_start_val = start_val;
826 *out_end_val = end_val;
834 resolve_relocations (MonoImageWriter *acfg)
838 gsize end_val, start_val;
843 rr = g_new0 (ElfRelocA, acfg->num_relocs);
846 for (reloc = acfg->relocations; reloc; reloc = reloc->next) {
847 resolve_reloc (acfg, reloc, &data, &vaddr, &start_val, &end_val);
848 /* FIXME: little endian */
850 data [1] = end_val >> 8;
851 data [2] = end_val >> 16;
852 data [3] = end_val >> 24;
854 if (start_val == 0 && reloc->val1 [0] != '.') {
855 rr [i].r_offset = vaddr;
856 rr [i].r_info = R_X86_64_RELATIVE;
857 rr [i].r_addend = end_val;
859 g_assert (i <= acfg->num_relocs);
865 #else /* USE_ELF_RELA */
868 do_reloc (MonoImageWriter *acfg, BinReloc *reloc, guint8 *data, gssize addr)
872 * We use the official ARM relocation types, but implement only the stuff actually
873 * needed by the code we generate.
875 switch (reloc->reloc_type) {
878 guint32 *code = (guint32*)(gpointer)data;
882 if (reloc->reloc_type == R_ARM_CALL)
884 g_assert (data [3] == 0xeb);
887 g_assert (data [3] == 0xea);
888 if (diff >= 0 && diff <= 33554431) {
890 ins = (ins & 0xff000000) | diff;
892 } else if (diff <= 0 && diff >= -33554432) {
894 ins = (ins & 0xff000000) | (diff & ~0xff000000);
897 g_assert_not_reached ();
901 case R_ARM_ALU_PC_G0_NC: {
902 /* Generated by emit_plt () */
906 g_assert (val <= 0xffffff);
908 ARM_ADD_REG_IMM (code, ARMREG_IP, ARMREG_PC, (val & 0xFF0000) >> 16, 16);
910 ARM_ADD_REG_IMM (code, ARMREG_IP, ARMREG_PC, 0, 0);
911 ARM_ADD_REG_IMM (code, ARMREG_IP, ARMREG_IP, (val & 0xFF00) >> 8, 24);
912 ARM_LDR_IMM (code, ARMREG_PC, ARMREG_IP, val & 0xFF);
916 g_assert_not_reached ();
919 g_assert_not_reached ();
924 resolve_relocations (MonoImageWriter *acfg)
928 gsize end_val, start_val;
933 rr = g_new0 (ElfReloc, acfg->num_relocs);
936 for (reloc = acfg->relocations; reloc; reloc = reloc->next) {
937 resolve_reloc (acfg, reloc, &data, &vaddr, &start_val, &end_val);
938 /* FIXME: little endian */
939 if (reloc->reloc_type) {
941 g_assert (start_val > 0);
942 do_reloc (acfg, reloc, data, end_val);
945 data [1] = end_val >> 8;
946 data [2] = end_val >> 16;
947 data [3] = end_val >> 24;
950 if (start_val == 0 && reloc->val1 [0] != '.') {
951 rr [i].r_offset = vaddr;
952 rr [i].r_info = R_386_RELATIVE;
954 g_assert (i <= acfg->num_relocs);
960 #endif /* USE_ELF_RELA */
963 bin_writer_emit_writeout (MonoImageWriter *acfg)
967 ElfProgHeader progh [3];
968 ElfSectHeader secth [SECT_NUM];
974 ElfStrTable str_table = {NULL, NULL};
975 ElfStrTable sh_str_table = {NULL, NULL};
976 ElfStrTable dyn_str_table = {NULL, NULL};
977 BinSection* all_sections [32];
978 BinSection* sections [SECT_NUM];
981 ElfDynamic dynamic [14];
983 int i, num_sections, file_offset, virt_offset, size, num_symtab;
988 /* Section headers */
989 memset (§h, 0, sizeof (secth));
990 memset (&dynamic, 0, sizeof (dynamic));
991 memset (&header, 0, sizeof (header));
993 for (i = 1; i < SECT_NUM; ++i) {
994 secth [i].sh_name = str_table_add (&sh_str_table, section_info [i].name);
995 secth [i].sh_type = section_info [i].type;
996 secth [i].sh_addralign = section_info [i].align;
997 secth [i].sh_flags = section_info [i].flags;
998 secth [i].sh_entsize = section_info [i].esize;
1000 secth [SECT_DYNSYM].sh_info = SIZEOF_VOID_P == 4 ? 4 : 2;
1001 secth [SECT_SYMTAB].sh_info = SIZEOF_VOID_P == 4 ? 20 : 17;
1002 secth [SECT_HASH].sh_link = SECT_DYNSYM;
1003 secth [SECT_DYNSYM].sh_link = SECT_DYNSTR;
1004 secth [SECT_REL_DYN].sh_link = SECT_DYNSYM;
1005 secth [SECT_RELA_DYN].sh_link = SECT_DYNSYM;
1006 secth [SECT_DYNAMIC].sh_link = SECT_DYNSTR;
1007 secth [SECT_SYMTAB].sh_link = SECT_STRTAB;
1009 num_sections = collect_sections (acfg, secth, all_sections, 16);
1010 hash = build_hash (acfg, num_sections, &dyn_str_table);
1011 num_symtab = hash [1]; /* FIXME */
1013 g_print ("num_sections: %d\n", num_sections);
1014 g_print ("dynsym: %d, dynstr size: %d\n", hash [1], (int)dyn_str_table.data->len);
1015 for (i = 0; i < num_sections; ++i) {
1016 g_print ("section %s, size: %d, %x\n", all_sections [i]->name, all_sections [i]->cur_offset, all_sections [i]->cur_offset);
1019 /* Associate the bin sections with the ELF sections */
1020 memset (sections, 0, sizeof (sections));
1021 for (i = 0; i < num_sections; ++i) {
1022 BinSection *sect = all_sections [i];
1025 for (j = 0; j < SECT_NUM; ++j) {
1026 if (strcmp (sect->name, section_info [j].name) == 0) {
1032 sections [all_sections [i]->shidx] = sect;
1035 /* at this point we know where in the file the first segment sections go */
1036 dynsym = collect_syms (acfg, hash, &dyn_str_table, NULL, NULL);
1037 num_local_syms = hash [1];
1038 symtab = collect_syms (acfg, NULL, &str_table, secth, &num_local_syms);
1040 file_offset = virt_offset = sizeof (header) + sizeof (progh);
1041 secth [SECT_HASH].sh_addr = secth [SECT_HASH].sh_offset = file_offset;
1042 size = sizeof (int) * (2 + hash [0] + hash [1]);
1043 virt_offset = (file_offset += size);
1044 secth [SECT_HASH].sh_size = size;
1045 secth [SECT_DYNSYM].sh_addr = secth [SECT_DYNSYM].sh_offset = file_offset;
1046 size = sizeof (ElfSymbol) * hash [1];
1047 virt_offset = (file_offset += size);
1048 secth [SECT_DYNSYM].sh_size = size;
1049 secth [SECT_DYNSTR].sh_addr = secth [SECT_DYNSTR].sh_offset = file_offset;
1050 size = dyn_str_table.data->len;
1051 virt_offset = (file_offset += size);
1052 secth [SECT_DYNSTR].sh_size = size;
1054 file_offset &= ~(4-1);
1055 secth [SECT_REL_DYN].sh_addr = secth [SECT_REL_DYN].sh_offset = file_offset;
1056 #ifndef USE_ELF_RELA
1057 size = sizeof (ElfReloc) * acfg->num_relocs;
1061 virt_offset = (file_offset += size);
1062 secth [SECT_REL_DYN].sh_size = size;
1063 secth [SECT_RELA_DYN].sh_addr = secth [SECT_RELA_DYN].sh_offset = file_offset;
1065 size = sizeof (ElfRelocA) * acfg->num_relocs;
1069 virt_offset = (file_offset += size);
1070 secth [SECT_RELA_DYN].sh_size = size;
1072 file_offset = ALIGN_TO (file_offset, secth [SECT_TEXT].sh_addralign);
1073 virt_offset = file_offset;
1074 secth [SECT_TEXT].sh_addr = secth [SECT_TEXT].sh_offset = file_offset;
1075 if (sections [SECT_TEXT]) {
1076 size = sections [SECT_TEXT]->cur_offset;
1077 secth [SECT_TEXT].sh_size = size;
1078 file_offset += size;
1081 file_offset = ALIGN_TO (file_offset, secth [SECT_DYNAMIC].sh_addralign);
1082 virt_offset = file_offset;
1084 /* .dynamic, .got.plt, .data, .bss here */
1085 /* Have to increase the virt offset since these go to a separate segment */
1086 virt_offset += PAGESIZE;
1087 secth [SECT_DYNAMIC].sh_addr = virt_offset;
1088 secth [SECT_DYNAMIC].sh_offset = file_offset;
1089 size = sizeof (dynamic);
1090 secth [SECT_DYNAMIC].sh_size = size;
1091 file_offset += size;
1092 virt_offset += size;
1094 file_offset = ALIGN_TO (file_offset, secth [SECT_GOT_PLT].sh_addralign);
1095 virt_offset = ALIGN_TO (virt_offset, secth [SECT_GOT_PLT].sh_addralign);
1096 secth [SECT_GOT_PLT].sh_addr = virt_offset;
1097 secth [SECT_GOT_PLT].sh_offset = file_offset;
1099 secth [SECT_GOT_PLT].sh_size = size;
1100 file_offset += size;
1101 virt_offset += size;
1103 file_offset = ALIGN_TO (file_offset, secth [SECT_DATA].sh_addralign);
1104 virt_offset = ALIGN_TO (virt_offset, secth [SECT_DATA].sh_addralign);
1105 secth [SECT_DATA].sh_addr = virt_offset;
1106 secth [SECT_DATA].sh_offset = file_offset;
1107 if (sections [SECT_DATA]) {
1108 size = sections [SECT_DATA]->cur_offset;
1109 secth [SECT_DATA].sh_size = size;
1110 file_offset += size;
1111 virt_offset += size;
1114 file_offset = ALIGN_TO (file_offset, secth [SECT_BSS].sh_addralign);
1115 virt_offset = ALIGN_TO (virt_offset, secth [SECT_BSS].sh_addralign);
1116 secth [SECT_BSS].sh_addr = virt_offset;
1117 secth [SECT_BSS].sh_offset = file_offset;
1118 if (sections [SECT_BSS]) {
1119 size = sections [SECT_BSS]->cur_offset;
1120 secth [SECT_BSS].sh_size = size;
1123 /* virtual doesn't matter anymore */
1124 file_offset = ALIGN_TO (file_offset, secth [SECT_DEBUG_FRAME].sh_addralign);
1125 secth [SECT_DEBUG_FRAME].sh_offset = file_offset;
1126 if (sections [SECT_DEBUG_FRAME])
1127 size = sections [SECT_DEBUG_FRAME]->cur_offset;
1130 secth [SECT_DEBUG_FRAME].sh_size = size;
1131 file_offset += size;
1133 secth [SECT_DEBUG_INFO].sh_offset = file_offset;
1134 if (sections [SECT_DEBUG_INFO])
1135 size = sections [SECT_DEBUG_INFO]->cur_offset;
1138 secth [SECT_DEBUG_INFO].sh_size = size;
1139 file_offset += size;
1141 secth [SECT_DEBUG_ABBREV].sh_offset = file_offset;
1142 if (sections [SECT_DEBUG_ABBREV])
1143 size = sections [SECT_DEBUG_ABBREV]->cur_offset;
1146 secth [SECT_DEBUG_ABBREV].sh_size = size;
1147 file_offset += size;
1149 secth [SECT_DEBUG_LINE].sh_offset = file_offset;
1150 if (sections [SECT_DEBUG_LINE])
1151 size = sections [SECT_DEBUG_LINE]->cur_offset;
1154 secth [SECT_DEBUG_LINE].sh_size = size;
1155 file_offset += size;
1157 secth [SECT_DEBUG_LOC].sh_offset = file_offset;
1158 if (sections [SECT_DEBUG_LOC])
1159 size = sections [SECT_DEBUG_LOC]->cur_offset;
1162 secth [SECT_DEBUG_LOC].sh_size = size;
1163 file_offset += size;
1165 file_offset = ALIGN_TO (file_offset, secth [SECT_SHSTRTAB].sh_addralign);
1166 secth [SECT_SHSTRTAB].sh_offset = file_offset;
1167 size = sh_str_table.data->len;
1168 secth [SECT_SHSTRTAB].sh_size = size;
1169 file_offset += size;
1171 file_offset = ALIGN_TO (file_offset, secth [SECT_SYMTAB].sh_addralign);
1172 secth [SECT_SYMTAB].sh_offset = file_offset;
1173 size = sizeof (ElfSymbol) * num_local_syms;
1174 secth [SECT_SYMTAB].sh_size = size;
1175 file_offset += size;
1177 file_offset = ALIGN_TO (file_offset, secth [SECT_STRTAB].sh_addralign);
1178 secth [SECT_STRTAB].sh_offset = file_offset;
1179 size = str_table.data->len;
1180 secth [SECT_STRTAB].sh_size = size;
1181 file_offset += size;
1184 file_offset &= ~(4-1);
1186 header.e_ident [EI_MAG0] = ELFMAG0;
1187 header.e_ident [EI_MAG1] = ELFMAG1;
1188 header.e_ident [EI_MAG2] = ELFMAG2;
1189 header.e_ident [EI_MAG3] = ELFMAG3;
1190 header.e_ident [EI_CLASS] = SIZEOF_VOID_P == 4 ? ELFCLASS32 : ELFCLASS64;
1191 header.e_ident [EI_DATA] = ELFDATA2LSB;
1192 header.e_ident [EI_VERSION] = EV_CURRENT;
1193 header.e_ident [EI_OSABI] = ELFOSABI_NONE;
1194 header.e_ident [EI_ABIVERSION] = 0;
1195 for (i = EI_PAD; i < EI_NIDENT; ++i)
1196 header.e_ident [i] = 0;
1198 header.e_type = ET_DYN;
1199 #if defined(__i386__)
1200 header.e_machine = EM_386;
1201 #elif defined(__x86_64__)
1202 header.e_machine = EM_X86_64;
1203 #elif defined(__arm__)
1204 header.e_machine = EM_ARM;
1206 g_assert_not_reached ();
1208 header.e_version = 1;
1210 header.e_phoff = sizeof (header);
1211 header.e_ehsize = sizeof (header);
1212 header.e_phentsize = sizeof (ElfProgHeader);
1214 header.e_entry = secth [SECT_TEXT].sh_addr;
1215 header.e_shstrndx = SECT_SHSTRTAB;
1216 header.e_shentsize = sizeof (ElfSectHeader);
1217 header.e_shnum = SECT_NUM;
1218 header.e_shoff = file_offset;
1222 dynamic [i].d_tag = DT_HASH;
1223 dynamic [i].d_un.d_val = secth [SECT_HASH].sh_offset;
1225 dynamic [i].d_tag = DT_STRTAB;
1226 dynamic [i].d_un.d_val = secth [SECT_DYNSTR].sh_offset;
1228 dynamic [i].d_tag = DT_SYMTAB;
1229 dynamic [i].d_un.d_val = secth [SECT_DYNSYM].sh_offset;
1231 dynamic [i].d_tag = DT_STRSZ;
1232 dynamic [i].d_un.d_val = dyn_str_table.data->len;
1234 dynamic [i].d_tag = DT_SYMENT;
1235 dynamic [i].d_un.d_val = sizeof (ElfSymbol);
1238 dynamic [i].d_tag = DT_RELA;
1239 dynamic [i].d_un.d_val = secth [SECT_RELA_DYN].sh_offset;
1241 dynamic [i].d_tag = DT_RELASZ;
1242 dynamic [i].d_un.d_val = secth [SECT_RELA_DYN].sh_size;
1244 dynamic [i].d_tag = DT_RELAENT;
1245 dynamic [i].d_un.d_val = sizeof (ElfRelocA);
1248 dynamic [i].d_tag = DT_REL;
1249 dynamic [i].d_un.d_val = secth [SECT_REL_DYN].sh_offset;
1251 dynamic [i].d_tag = DT_RELSZ;
1252 dynamic [i].d_un.d_val = secth [SECT_REL_DYN].sh_size;
1254 dynamic [i].d_tag = DT_RELENT;
1255 dynamic [i].d_un.d_val = sizeof (ElfReloc);
1258 dynamic [i].d_tag = DT_RELCOUNT;
1259 dynamic [i].d_un.d_val = acfg->num_relocs;
1262 /* Program header */
1263 memset (&progh, 0, sizeof (progh));
1264 progh [0].p_type = PT_LOAD;
1265 progh [0].p_filesz = progh [0].p_memsz = secth [SECT_DYNAMIC].sh_offset;
1266 progh [0].p_align = 4096;
1267 progh [0].p_flags = 5;
1269 progh [1].p_type = PT_LOAD;
1270 progh [1].p_offset = secth [SECT_DYNAMIC].sh_offset;
1271 progh [1].p_vaddr = progh [1].p_paddr = secth [SECT_DYNAMIC].sh_addr;
1272 progh [1].p_filesz = secth [SECT_BSS].sh_offset - secth [SECT_DYNAMIC].sh_offset;
1273 progh [1].p_memsz = secth [SECT_BSS].sh_addr + secth [SECT_BSS].sh_size - secth [SECT_DYNAMIC].sh_addr;
1274 progh [1].p_align = 4096;
1275 progh [1].p_flags = 6;
1277 progh [2].p_type = PT_DYNAMIC;
1278 progh [2].p_offset = secth [SECT_DYNAMIC].sh_offset;
1279 progh [2].p_vaddr = progh [2].p_paddr = secth [SECT_DYNAMIC].sh_addr;
1280 progh [2].p_filesz = progh [2].p_memsz = secth [SECT_DYNAMIC].sh_size;
1281 progh [2].p_align = SIZEOF_VOID_P;
1282 progh [2].p_flags = 6;
1284 /* Compute the addresses of the bin sections, so relocation can be done */
1285 for (i = 0; i < SECT_NUM; ++i) {
1287 sections [i]->file_offset = secth [i].sh_offset;
1288 sections [i]->virt_offset = secth [i].sh_addr;
1292 reloc_symbols (acfg, dynsym, secth, &dyn_str_table, TRUE);
1293 reloc_symbols (acfg, symtab, secth, &str_table, FALSE);
1294 relocs = resolve_relocations (acfg);
1296 fwrite (&header, sizeof (header), 1, file);
1297 fwrite (&progh, sizeof (progh), 1, file);
1298 fwrite (hash, sizeof (int) * (hash [0] + hash [1] + 2), 1, file);
1299 fwrite (dynsym, sizeof (ElfSymbol) * hash [1], 1, file);
1300 fwrite (dyn_str_table.data->str, dyn_str_table.data->len, 1, file);
1302 fseek (file, secth [SECT_REL_DYN].sh_offset, SEEK_SET);
1303 fwrite (relocs, sizeof (ElfReloc), acfg->num_relocs, file);
1306 fseek (file, secth [SECT_RELA_DYN].sh_offset, SEEK_SET);
1307 fwrite (relocs, secth [SECT_RELA_DYN].sh_size, 1, file);
1310 if (sections [SECT_TEXT]) {
1311 fseek (file, secth [SECT_TEXT].sh_offset, SEEK_SET);
1312 fwrite (sections [SECT_TEXT]->data, sections [SECT_TEXT]->cur_offset, 1, file);
1315 fwrite (dynamic, sizeof (dynamic), 1, file);
1318 size = secth [SECT_DYNAMIC].sh_addr;
1319 fwrite (&size, sizeof (size), 1, file);
1322 if (sections [SECT_DATA]) {
1323 fseek (file, secth [SECT_DATA].sh_offset, SEEK_SET);
1324 fwrite (sections [SECT_DATA]->data, sections [SECT_DATA]->cur_offset, 1, file);
1327 fseek (file, secth [SECT_DEBUG_FRAME].sh_offset, SEEK_SET);
1328 if (sections [SECT_DEBUG_FRAME])
1329 fwrite (sections [SECT_DEBUG_FRAME]->data, sections [SECT_DEBUG_FRAME]->cur_offset, 1, file);
1330 fseek (file, secth [SECT_DEBUG_INFO].sh_offset, SEEK_SET);
1331 if (sections [SECT_DEBUG_INFO])
1332 fwrite (sections [SECT_DEBUG_INFO]->data, sections [SECT_DEBUG_INFO]->cur_offset, 1, file);
1333 fseek (file, secth [SECT_DEBUG_ABBREV].sh_offset, SEEK_SET);
1334 if (sections [SECT_DEBUG_ABBREV])
1335 fwrite (sections [SECT_DEBUG_ABBREV]->data, sections [SECT_DEBUG_ABBREV]->cur_offset, 1, file);
1336 fseek (file, secth [SECT_DEBUG_LINE].sh_offset, SEEK_SET);
1337 if (sections [SECT_DEBUG_LINE])
1338 fwrite (sections [SECT_DEBUG_LINE]->data, sections [SECT_DEBUG_LINE]->cur_offset, 1, file);
1339 fseek (file, secth [SECT_DEBUG_LINE].sh_offset, SEEK_SET);
1340 if (sections [SECT_DEBUG_LOC])
1341 fwrite (sections [SECT_DEBUG_LOC]->data, sections [SECT_DEBUG_LOC]->cur_offset, 1, file);
1342 fseek (file, secth [SECT_SHSTRTAB].sh_offset, SEEK_SET);
1343 fwrite (sh_str_table.data->str, sh_str_table.data->len, 1, file);
1344 fseek (file, secth [SECT_SYMTAB].sh_offset, SEEK_SET);
1345 fwrite (symtab, sizeof (ElfSymbol) * num_local_syms, 1, file);
1346 fseek (file, secth [SECT_STRTAB].sh_offset, SEEK_SET);
1347 fwrite (str_table.data->str, str_table.data->len, 1, file);
1348 /*g_print ("file_offset %d vs %d\n", file_offset, ftell (file));*/
1349 /*g_assert (file_offset >= ftell (file));*/
1350 fseek (file, file_offset, SEEK_SET);
1351 fwrite (§h, sizeof (secth), 1, file);
1357 #endif /* USE_ELF_WRITER */
1359 #endif /* USE_BIN_WRITER */
1364 asm_writer_emit_start (MonoImageWriter *acfg)
1369 asm_writer_emit_writeout (MonoImageWriter *acfg)
1377 asm_writer_emit_unset_mode (MonoImageWriter *acfg)
1379 if (acfg->mode == EMIT_NONE)
1381 fprintf (acfg->fp, "\n");
1382 acfg->mode = EMIT_NONE;
1386 asm_writer_emit_section_change (MonoImageWriter *acfg, const char *section_name, int subsection_index)
1388 asm_writer_emit_unset_mode (acfg);
1389 #if defined(PLATFORM_WIN32)
1390 fprintf (acfg->fp, ".section %s\n", section_name);
1391 #elif defined(__MACH__)
1392 if (strcmp(section_name, ".bss") == 0)
1393 fprintf (acfg->fp, "%s\n", ".data");
1395 fprintf (acfg->fp, "%s\n", section_name);
1396 #elif defined(sparc)
1397 /* For solaris as, GNU as should accept the same */
1398 fprintf (acfg->fp, ".section \"%s\"\n", section_name);
1399 #elif defined(__arm__)
1400 /* ARM gas doesn't seem to like subsections of .bss */
1401 if (!strcmp (section_name, ".text") || !strcmp (section_name, ".data")) {
1402 fprintf (acfg->fp, "%s %d\n", section_name, subsection_index);
1404 fprintf (acfg->fp, ".section \"%s\"\n", section_name);
1405 fprintf (acfg->fp, ".subsection %d\n", subsection_index);
1408 if (!strcmp (section_name, ".text") || !strcmp (section_name, ".data") || !strcmp (section_name, ".bss")) {
1409 fprintf (acfg->fp, "%s %d\n", section_name, subsection_index);
1411 fprintf (acfg->fp, ".section \"%s\"\n", section_name);
1412 fprintf (acfg->fp, ".subsection %d\n", subsection_index);
1418 asm_writer_emit_symbol_type (MonoImageWriter *acfg, const char *name, gboolean func)
1427 asm_writer_emit_unset_mode (acfg);
1428 #if defined(__MACH__)
1430 #elif defined(sparc) || defined(__arm__)
1431 fprintf (acfg->fp, "\t.type %s,#%s\n", name, stype);
1432 #elif defined(PLATFORM_WIN32)
1434 #elif defined(__x86_64__) || defined(__i386__)
1435 fprintf (acfg->fp, "\t.type %s,@%s\n", name, stype);
1437 fprintf (acfg->fp, "\t.type %s,@%s\n", name, stype);
1442 asm_writer_emit_global (MonoImageWriter *acfg, const char *name, gboolean func)
1444 asm_writer_emit_unset_mode (acfg);
1445 #if (defined(__ppc__) && defined(__MACH__)) || defined(PLATFORM_WIN32)
1446 // mach-o always uses a '_' prefix.
1447 fprintf (acfg->fp, "\t.globl _%s\n", name);
1449 fprintf (acfg->fp, "\t.globl %s\n", name);
1452 asm_writer_emit_symbol_type (acfg, name, func);
1456 asm_writer_emit_local_symbol (MonoImageWriter *acfg, const char *name, const char *end_label, gboolean func)
1458 asm_writer_emit_unset_mode (acfg);
1460 fprintf (acfg->fp, "\t.local %s\n", name);
1462 asm_writer_emit_symbol_type (acfg, name, func);
1466 asm_writer_emit_label (MonoImageWriter *acfg, const char *name)
1468 asm_writer_emit_unset_mode (acfg);
1469 #if (defined(__ppc__) && defined(__MACH__)) || defined(PLATFORM_WIN32)
1470 // mach-o always uses a '_' prefix.
1471 fprintf (acfg->fp, "_%s:\n", name);
1473 fprintf (acfg->fp, "%s:\n", name);
1476 #if defined(PLATFORM_WIN32)
1477 /* Emit a normal label too */
1478 fprintf (acfg->fp, "%s:\n", name);
1483 asm_writer_emit_string (MonoImageWriter *acfg, const char *value)
1485 asm_writer_emit_unset_mode (acfg);
1486 fprintf (acfg->fp, "\t%s \"%s\"\n", AS_STRING_DIRECTIVE, value);
1490 asm_writer_emit_line (MonoImageWriter *acfg)
1492 asm_writer_emit_unset_mode (acfg);
1493 fprintf (acfg->fp, "\n");
1497 asm_writer_emit_alignment (MonoImageWriter *acfg, int size)
1499 asm_writer_emit_unset_mode (acfg);
1500 #if defined(__arm__)
1501 fprintf (acfg->fp, "\t.align %d\n", ilog2 (size));
1502 #elif defined(__ppc__) && defined(__MACH__)
1503 // the mach-o assembler specifies alignments as powers of 2.
1504 fprintf (acfg->fp, "\t.align %d\t; ilog2\n", ilog2(size));
1505 #elif defined(__powerpc__)
1506 /* ignore on linux/ppc */
1508 fprintf (acfg->fp, "\t.align %d\n", size);
1513 asm_writer_emit_pointer_unaligned (MonoImageWriter *acfg, const char *target)
1515 asm_writer_emit_unset_mode (acfg);
1516 #if defined(__x86_64__)
1517 fprintf (acfg->fp, "\t.quad %s\n", target ? target : "0");
1518 #elif defined(sparc) && SIZEOF_VOID_P == 8
1519 fprintf (acfg->fp, "\t.xword %s\n", target ? target : "0");
1521 fprintf (acfg->fp, "\t.long %s\n", target ? target : "0");
1526 asm_writer_emit_pointer (MonoImageWriter *acfg, const char *target)
1528 asm_writer_emit_unset_mode (acfg);
1529 asm_writer_emit_alignment (acfg, sizeof (gpointer));
1530 asm_writer_emit_pointer_unaligned (acfg, target);
1533 static char *byte_to_str;
1536 asm_writer_emit_bytes (MonoImageWriter *acfg, const guint8* buf, int size)
1539 if (acfg->mode != EMIT_BYTE) {
1540 acfg->mode = EMIT_BYTE;
1541 acfg->col_count = 0;
1544 if (byte_to_str == NULL) {
1545 byte_to_str = g_new0 (char, 256 * 8);
1546 for (i = 0; i < 256; ++i) {
1547 sprintf (byte_to_str + (i * 8), ",%d", i);
1551 for (i = 0; i < size; ++i, ++acfg->col_count) {
1552 if ((acfg->col_count % 32) == 0)
1553 fprintf (acfg->fp, "\n\t.byte %d", buf [i]);
1555 fputs (byte_to_str + (buf [i] * 8), acfg->fp);
1560 asm_writer_emit_int16 (MonoImageWriter *acfg, int value)
1562 if (acfg->mode != EMIT_WORD) {
1563 acfg->mode = EMIT_WORD;
1564 acfg->col_count = 0;
1566 if ((acfg->col_count++ % 8) == 0)
1567 #if defined(__MACH__)
1568 fprintf (acfg->fp, "\n\t.short ");
1569 #elif defined(__arm__)
1570 /* FIXME: Use .hword on other archs as well */
1571 fprintf (acfg->fp, "\n\t.hword ");
1573 fprintf (acfg->fp, "\n\t.word ");
1576 fprintf (acfg->fp, ", ");
1577 fprintf (acfg->fp, "%d", value);
1581 asm_writer_emit_int32 (MonoImageWriter *acfg, int value)
1583 if (acfg->mode != EMIT_LONG) {
1584 acfg->mode = EMIT_LONG;
1585 acfg->col_count = 0;
1587 if ((acfg->col_count++ % 8) == 0)
1588 fprintf (acfg->fp, "\n\t.long ");
1590 fprintf (acfg->fp, ",");
1591 fprintf (acfg->fp, "%d", value);
1595 asm_writer_emit_symbol_diff (MonoImageWriter *acfg, const char *end, const char* start, int offset)
1597 if (acfg->mode != EMIT_LONG) {
1598 acfg->mode = EMIT_LONG;
1599 acfg->col_count = 0;
1601 if ((acfg->col_count++ % 8) == 0)
1602 fprintf (acfg->fp, "\n\t.long ");
1604 fprintf (acfg->fp, ",");
1606 fprintf (acfg->fp, "%s - %s + %d", end, start, offset);
1607 else if (offset < 0)
1608 fprintf (acfg->fp, "%s - %s %d", end, start, offset);
1610 fprintf (acfg->fp, "%s - %s", end, start);
1614 asm_writer_emit_zero_bytes (MonoImageWriter *acfg, int num)
1616 asm_writer_emit_unset_mode (acfg);
1617 #if defined(__MACH__)
1618 fprintf (acfg->fp, "\t.space %d\n", num);
1620 fprintf (acfg->fp, "\t.skip %d\n", num);
1624 /* EMIT FUNCTIONS */
1627 img_writer_emit_start (MonoImageWriter *acfg)
1629 #ifdef USE_BIN_WRITER
1630 if (acfg->use_bin_writer)
1631 bin_writer_emit_start (acfg);
1633 asm_writer_emit_start (acfg);
1635 asm_writer_emit_start (acfg);
1640 img_writer_emit_section_change (MonoImageWriter *acfg, const char *section_name, int subsection_index)
1642 #ifdef USE_BIN_WRITER
1643 if (acfg->use_bin_writer)
1644 bin_writer_emit_section_change (acfg, section_name, subsection_index);
1646 asm_writer_emit_section_change (acfg, section_name, subsection_index);
1648 asm_writer_emit_section_change (acfg, section_name, subsection_index);
1651 acfg->current_section = section_name;
1652 acfg->current_subsection = subsection_index;
1656 img_writer_emit_push_section (MonoImageWriter *acfg, const char *section_name, int subsection)
1658 g_assert (acfg->stack_pos < 16 - 1);
1659 acfg->section_stack [acfg->stack_pos] = acfg->current_section;
1660 acfg->subsection_stack [acfg->stack_pos] = acfg->current_subsection;
1663 img_writer_emit_section_change (acfg, section_name, subsection);
1667 img_writer_emit_pop_section (MonoImageWriter *acfg)
1669 g_assert (acfg->stack_pos > 0);
1671 img_writer_emit_section_change (acfg, acfg->section_stack [acfg->stack_pos], acfg->subsection_stack [acfg->stack_pos]);
1675 img_writer_emit_global (MonoImageWriter *acfg, const char *name, gboolean func)
1677 #ifdef USE_BIN_WRITER
1678 if (acfg->use_bin_writer)
1679 bin_writer_emit_global (acfg, name, func);
1681 asm_writer_emit_global (acfg, name, func);
1683 asm_writer_emit_global (acfg, name, func);
1688 img_writer_emit_local_symbol (MonoImageWriter *acfg, const char *name, const char *end_label, gboolean func)
1690 #ifdef USE_BIN_WRITER
1691 if (acfg->use_bin_writer)
1692 bin_writer_emit_local_symbol (acfg, name, end_label, func);
1694 asm_writer_emit_local_symbol (acfg, name, end_label, func);
1696 asm_writer_emit_local_symbol (acfg, name, end_label, func);
1701 img_writer_emit_label (MonoImageWriter *acfg, const char *name)
1703 #ifdef USE_BIN_WRITER
1704 if (acfg->use_bin_writer)
1705 bin_writer_emit_label (acfg, name);
1707 asm_writer_emit_label (acfg, name);
1709 asm_writer_emit_label (acfg, name);
1714 img_writer_emit_bytes (MonoImageWriter *acfg, const guint8* buf, int size)
1716 #ifdef USE_BIN_WRITER
1717 if (acfg->use_bin_writer)
1718 bin_writer_emit_bytes (acfg, buf, size);
1720 asm_writer_emit_bytes (acfg, buf, size);
1722 asm_writer_emit_bytes (acfg, buf, size);
1727 img_writer_emit_string (MonoImageWriter *acfg, const char *value)
1729 #ifdef USE_BIN_WRITER
1730 if (acfg->use_bin_writer)
1731 bin_writer_emit_string (acfg, value);
1733 asm_writer_emit_string (acfg, value);
1735 asm_writer_emit_string (acfg, value);
1740 img_writer_emit_line (MonoImageWriter *acfg)
1742 #ifdef USE_BIN_WRITER
1743 if (acfg->use_bin_writer)
1744 bin_writer_emit_line (acfg);
1746 asm_writer_emit_line (acfg);
1748 asm_writer_emit_line (acfg);
1753 img_writer_emit_alignment (MonoImageWriter *acfg, int size)
1755 #ifdef USE_BIN_WRITER
1756 if (acfg->use_bin_writer)
1757 bin_writer_emit_alignment (acfg, size);
1759 asm_writer_emit_alignment (acfg, size);
1761 asm_writer_emit_alignment (acfg, size);
1766 img_writer_emit_pointer_unaligned (MonoImageWriter *acfg, const char *target)
1768 #ifdef USE_BIN_WRITER
1769 if (acfg->use_bin_writer)
1770 bin_writer_emit_pointer_unaligned (acfg, target);
1772 asm_writer_emit_pointer_unaligned (acfg, target);
1774 asm_writer_emit_pointer_unaligned (acfg, target);
1779 img_writer_emit_pointer (MonoImageWriter *acfg, const char *target)
1781 #ifdef USE_BIN_WRITER
1782 if (acfg->use_bin_writer)
1783 bin_writer_emit_pointer (acfg, target);
1785 asm_writer_emit_pointer (acfg, target);
1787 asm_writer_emit_pointer (acfg, target);
1792 img_writer_emit_int16 (MonoImageWriter *acfg, int value)
1794 #ifdef USE_BIN_WRITER
1795 if (acfg->use_bin_writer)
1796 bin_writer_emit_int16 (acfg, value);
1798 asm_writer_emit_int16 (acfg, value);
1800 asm_writer_emit_int16 (acfg, value);
1805 img_writer_emit_int32 (MonoImageWriter *acfg, int value)
1807 #ifdef USE_BIN_WRITER
1808 if (acfg->use_bin_writer)
1809 bin_writer_emit_int32 (acfg, value);
1811 asm_writer_emit_int32 (acfg, value);
1813 asm_writer_emit_int32 (acfg, value);
1818 img_writer_emit_symbol_diff (MonoImageWriter *acfg, const char *end, const char* start, int offset)
1820 #ifdef USE_BIN_WRITER
1821 if (acfg->use_bin_writer)
1822 bin_writer_emit_symbol_diff (acfg, end, start, offset);
1824 asm_writer_emit_symbol_diff (acfg, end, start, offset);
1826 asm_writer_emit_symbol_diff (acfg, end, start, offset);
1831 img_writer_emit_zero_bytes (MonoImageWriter *acfg, int num)
1833 #ifdef USE_BIN_WRITER
1834 if (acfg->use_bin_writer)
1835 bin_writer_emit_zero_bytes (acfg, num);
1837 asm_writer_emit_zero_bytes (acfg, num);
1839 asm_writer_emit_zero_bytes (acfg, num);
1844 img_writer_emit_writeout (MonoImageWriter *acfg)
1846 #ifdef USE_BIN_WRITER
1847 if (acfg->use_bin_writer)
1848 return bin_writer_emit_writeout (acfg);
1850 return asm_writer_emit_writeout (acfg);
1852 return asm_writer_emit_writeout (acfg);
1857 img_writer_emit_byte (MonoImageWriter *acfg, guint8 val)
1859 img_writer_emit_bytes (acfg, &val, 1);
1863 * Emit a relocation entry of type RELOC_TYPE against symbol SYMBOL at the current PC.
1864 * Do not advance PC.
1867 img_writer_emit_reloc (MonoImageWriter *acfg, int reloc_type, const char *symbol, int addend)
1869 /* This is only supported by the bin writer */
1870 #ifdef USE_BIN_WRITER
1871 if (acfg->use_bin_writer)
1872 bin_writer_emit_reloc (acfg, reloc_type, symbol, addend);
1874 g_assert_not_reached ();
1876 g_assert_not_reached ();
1881 * img_writer_emit_unset_mode:
1883 * Flush buffered data so it is safe to write to the output file from outside this
1884 * module. This is a nop for the binary writer.
1887 img_writer_emit_unset_mode (MonoImageWriter *acfg)
1889 if (!acfg->use_bin_writer)
1890 asm_writer_emit_unset_mode (acfg);
1894 * Return whenever the binary writer is supported on this platform.
1897 bin_writer_supported (void)
1899 #ifdef USE_BIN_WRITER
1907 img_writer_create (FILE *fp, gboolean use_bin_writer)
1909 MonoImageWriter *w = g_new0 (MonoImageWriter, 1);
1911 #ifndef USE_BIN_WRITER
1912 g_assert (!use_bin_writer);
1916 w->use_bin_writer = use_bin_writer;
1917 w->mempool = mono_mempool_new ();
1923 img_writer_destroy (MonoImageWriter *w)
1925 // FIXME: Free all the stuff
1926 mono_mempool_destroy (w->mempool);