2 * Copyright (C) 1995-2011 University of Karlsruhe. All right reserved.
4 * This file is part of libFirm.
6 * This file may be distributed and/or modified under the terms of the
7 * GNU General Public License version 2 as published by the Free Software
8 * Foundation and appearing in the file LICENSE.GPL included in the
9 * packaging of this file.
11 * Licensees holding valid libFirm Professional Edition licenses may use
12 * this file in accordance with the libFirm Commercial License.
13 * Agreement provided with the Software.
15 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
16 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * @brief Dumps global variables and constants as gas assembler.
23 * @author Christian Wuerdig, Matthias Braun
45 #include "beemitter.h"
46 #include "be_dbgout.h"
48 /** by default, we generate assembler code for the Linux gas */
49 object_file_format_t be_gas_object_file_format = OBJECT_FILE_FORMAT_ELF;
50 elf_variant_t be_gas_elf_variant = ELF_VARIANT_NORMAL;
51 bool be_gas_emit_types = true;
52 char be_gas_elf_type_char = '@';
54 static be_gas_section_t current_section = (be_gas_section_t) -1;
57 * An environment containing all needed dumper data.
58 * Currently we create the file completely in memory first, then
59 * write it to the disk. This is an artifact from the old C-generating backend
60 * and even there NOT needed. So we might change it in the future.
62 typedef struct be_gas_decl_env {
63 be_gas_section_t section;
64 const be_main_env_t *main_env;
67 static void emit_section_macho(be_gas_section_t section)
69 be_gas_section_t base = section & GAS_SECTION_TYPE_MASK;
70 be_gas_section_t flags = section & ~GAS_SECTION_TYPE_MASK;
73 if (current_section == section)
75 current_section = section;
80 case GAS_SECTION_TEXT: name = "text"; break;
81 case GAS_SECTION_DATA: name = "data"; break;
82 case GAS_SECTION_RODATA: name = "const"; break;
83 case GAS_SECTION_BSS: name = "data"; break;
84 case GAS_SECTION_CONSTRUCTORS: name = "mod_init_func"; break;
85 case GAS_SECTION_DESTRUCTORS: name = "mod_term_func"; break;
86 case GAS_SECTION_PIC_TRAMPOLINES: name = "section\t__IMPORT,__jump_table,symbol_stubs,self_modifying_code+pure_instructions,5"; break;
87 case GAS_SECTION_PIC_SYMBOLS: name = "section\t__IMPORT,__pointers,non_lazy_symbol_pointers"; break;
88 case GAS_SECTION_CSTRING: name = "cstring"; break;
89 default: panic("unsupported scetion type 0x%X", section);
91 be_emit_irprintf("\t.%s\n", name);
93 } else if (flags & GAS_SECTION_FLAG_COMDAT) {
95 case GAS_SECTION_TEXT: name = "section __TEXT,__textcoal_nt,coalesced,pure_instructions"; break;
97 case GAS_SECTION_DATA: name = "section __DATA,__datacoal_nt,coalesced"; break;
98 case GAS_SECTION_RODATA: name = "section __TEXT,__const_coal,coalesced"; break;
99 case GAS_SECTION_CSTRING: name = "section __TEXT,__const_coal,coalesced"; break;
100 default: panic("unsupported scetion type 0x%X", section);
103 panic("unsupported section type 0x%X\n", section);
107 static void emit_section_sparc(be_gas_section_t section, const ir_entity *entity)
109 be_gas_section_t base = section & GAS_SECTION_TYPE_MASK;
110 be_gas_section_t flags = section & ~GAS_SECTION_TYPE_MASK;
111 static const char *const basename[] = {
112 "text", "data", "rodata", "bss", "ctors", "dtors"
115 if (current_section == section && !(section & GAS_SECTION_FLAG_COMDAT))
117 current_section = section;
119 be_emit_cstring("\t.section\t\".");
121 /* Part1: section-name */
122 if (flags & GAS_SECTION_FLAG_TLS)
124 assert(base < (be_gas_section_t)ARRAY_SIZE(basename));
125 be_emit_string(basename[base]);
127 if (flags & GAS_SECTION_FLAG_COMDAT) {
129 be_gas_emit_entity(entity);
133 /* for the simple sections we're done here */
137 be_emit_cstring(",#alloc");
140 case GAS_SECTION_TEXT: be_emit_cstring(",#execinstr"); break;
141 case GAS_SECTION_DATA:
142 case GAS_SECTION_BSS: be_emit_cstring(",#write"); break;
147 if (flags & GAS_SECTION_FLAG_TLS) {
148 be_emit_cstring(",#tls");
153 be_emit_write_line();
156 static void emit_section(be_gas_section_t section, const ir_entity *entity)
158 be_gas_section_t base = section & GAS_SECTION_TYPE_MASK;
159 be_gas_section_t flags = section & ~GAS_SECTION_TYPE_MASK;
160 static const char *const basename[] = {
161 "text", "data", "rodata", "bss", "ctors", "dtors"
163 static const char *const type[] = {
164 "progbits", "progbits", "progbits", "nobits", "progbits", "progbits"
167 if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) {
168 emit_section_macho(section);
170 } else if(be_gas_elf_variant == ELF_VARIANT_SPARC) {
171 emit_section_sparc(section, entity);
175 if (current_section == section && !(section & GAS_SECTION_FLAG_COMDAT))
177 current_section = section;
182 case GAS_SECTION_TEXT:
183 be_emit_cstring("\t.text\n");
184 be_emit_write_line();
186 case GAS_SECTION_DATA:
187 be_emit_cstring("\t.data\n");
188 be_emit_write_line();
190 case GAS_SECTION_RODATA:
191 be_emit_cstring("\t.section\t.rodata\n");
192 be_emit_write_line();
194 case GAS_SECTION_BSS:
195 be_emit_cstring("\t.bss\n");
196 be_emit_write_line();
203 assert(base < (be_gas_section_t) ARRAY_SIZE(basename));
204 be_emit_cstring("\t.section\t.");
206 if (flags & GAS_SECTION_FLAG_TLS)
208 be_emit_string(basename[base]);
209 if (flags & GAS_SECTION_FLAG_COMDAT) {
211 be_gas_emit_entity(entity);
215 be_emit_cstring(",\"");
216 if (be_gas_object_file_format != OBJECT_FILE_FORMAT_COFF)
218 if (base == GAS_SECTION_TEXT)
220 if (base != GAS_SECTION_RODATA && base != GAS_SECTION_TEXT)
222 if (flags & GAS_SECTION_FLAG_TLS)
224 if (flags & GAS_SECTION_FLAG_COMDAT)
227 if (be_gas_object_file_format != OBJECT_FILE_FORMAT_COFF) {
228 be_emit_cstring("\",");
229 be_emit_char(be_gas_elf_type_char);
230 be_emit_string(type[base]);
233 if (flags & GAS_SECTION_FLAG_COMDAT) {
235 be_gas_emit_entity(entity);
236 be_emit_cstring(",comdat");
239 be_emit_write_line();
244 void be_gas_emit_switch_section(be_gas_section_t section)
246 /* you have to produce a switch_section call with entity manually
247 * for comdat sections */
248 assert( !(section & GAS_SECTION_FLAG_COMDAT));
250 emit_section(section, NULL);
253 static ir_tarval *get_initializer_tarval(const ir_initializer_t *initializer)
255 if (initializer->kind == IR_INITIALIZER_TARVAL)
256 return initializer->tarval.value;
257 if (initializer->kind == IR_INITIALIZER_CONST) {
258 ir_node *node = initializer->consti.value;
259 if (is_Const(node)) {
260 return get_Const_tarval(node);
263 return get_tarval_undefined();
266 static bool initializer_is_string_const(const ir_initializer_t *initializer)
269 bool found_printable = false;
271 if (initializer->kind != IR_INITIALIZER_COMPOUND)
274 len = initializer->compound.n_initializers;
277 for (i = 0; i < len; ++i) {
281 ir_initializer_t *sub_initializer
282 = initializer->compound.initializers[i];
284 tv = get_initializer_tarval(sub_initializer);
285 if (!tarval_is_constant(tv))
288 mode = get_tarval_mode(tv);
289 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
292 c = get_tarval_long(tv);
293 if (isgraph(c) || isspace(c))
294 found_printable = true;
298 if (i == len - 1 && c != '\0')
302 return found_printable;
305 static bool initializer_is_null(const ir_initializer_t *initializer)
307 switch (initializer->kind) {
308 case IR_INITIALIZER_NULL:
310 case IR_INITIALIZER_TARVAL: {
311 ir_tarval *tv = initializer->tarval.value;
312 return tarval_is_null(tv);
314 case IR_INITIALIZER_CONST: {
315 ir_node *value = initializer->consti.value;
316 if (!is_Const(value))
318 return is_Const_null(value);
320 case IR_INITIALIZER_COMPOUND: {
322 for (i = 0; i < initializer->compound.n_initializers; ++i) {
323 ir_initializer_t *subinitializer
324 = initializer->compound.initializers[i];
325 if (!initializer_is_null(subinitializer))
331 panic("invalid initializer in initializer_is_null");
335 * Determine if an entity is a string constant
336 * @param ent The entity
337 * @return 1 if it is a string constant, 0 otherwise
339 static int entity_is_string_const(const ir_entity *ent)
341 ir_type *type, *element_type;
345 type = get_entity_type(ent);
347 /* if it's an array */
348 if (!is_Array_type(type))
351 element_type = get_array_element_type(type);
353 /* and the array's element type is primitive */
354 if (!is_Primitive_type(element_type))
357 /* and the mode of the element type is an int of
358 * the same size as the byte mode */
359 mode = get_type_mode(element_type);
360 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
363 if (ent->initializer != NULL) {
364 return initializer_is_string_const(ent->initializer);
365 } else if (entity_has_compound_ent_values(ent)) {
366 int found_printable = 0;
367 /* if it contains only printable chars and a 0 at the end */
368 n = get_compound_ent_n_values(ent);
369 for (i = 0; i < n; ++i) {
370 ir_node *irn = get_compound_ent_value(ent, i);
374 c = (int) get_tarval_long(get_Const_tarval(irn));
376 if (isgraph(c) || isspace(c))
381 if (i == n - 1 && c != '\0')
384 return found_printable;
390 static bool entity_is_null(const ir_entity *entity)
392 if (entity->initializer != NULL) {
393 return initializer_is_null(entity->initializer);
394 } else if (entity_has_compound_ent_values(entity)) {
395 /* I'm too lazy to implement this case as compound graph paths will be
396 * remove anyway in the future */
399 /* uninitialized, NULL is fine */
403 static bool is_comdat(const ir_entity *entity)
405 ir_linkage linkage = get_entity_linkage(entity);
406 return (linkage & IR_LINKAGE_MERGE)
407 && (linkage & IR_LINKAGE_GARBAGE_COLLECT);
410 static be_gas_section_t determine_basic_section(const ir_entity *entity)
414 if (is_method_entity(entity))
415 return GAS_SECTION_TEXT;
417 linkage = get_entity_linkage(entity);
418 if (linkage & IR_LINKAGE_CONSTANT) {
419 /* mach-o is the only one with a cstring section */
420 if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O
421 && entity_is_string_const(entity))
422 return GAS_SECTION_CSTRING;
424 return GAS_SECTION_RODATA;
426 if (entity_is_null(entity))
427 return GAS_SECTION_BSS;
429 return GAS_SECTION_DATA;
432 static be_gas_section_t determine_section(be_gas_decl_env_t *env,
433 const ir_entity *entity)
435 ir_type *owner = get_entity_owner(entity);
437 if (owner == get_segment_type(IR_SEGMENT_GLOBAL)) {
438 be_gas_section_t section = determine_basic_section(entity);
439 if (is_comdat(entity))
440 section |= GAS_SECTION_FLAG_COMDAT;
442 } else if (env != NULL && owner == env->main_env->pic_symbols_type) {
443 return GAS_SECTION_PIC_SYMBOLS;
444 } else if (env != NULL && owner == env->main_env->pic_trampolines_type) {
445 return GAS_SECTION_PIC_TRAMPOLINES;
446 } else if (owner == get_segment_type(IR_SEGMENT_CONSTRUCTORS)) {
447 return GAS_SECTION_CONSTRUCTORS;
448 } else if (owner == get_segment_type(IR_SEGMENT_DESTRUCTORS)) {
449 return GAS_SECTION_DESTRUCTORS;
450 } else if (owner == get_segment_type(IR_SEGMENT_THREAD_LOCAL)) {
451 be_gas_section_t section = determine_basic_section(entity);
452 if (is_comdat(entity))
453 section |= GAS_SECTION_FLAG_COMDAT;
455 return section | GAS_SECTION_FLAG_TLS;
458 /* the java frontend keeps some functions inside classes */
459 if (is_Class_type(owner)) {
460 return determine_basic_section(entity);
463 panic("Couldn't determine section for %+F?!?", entity);
466 static void emit_weak(const ir_entity *entity)
468 if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) {
469 be_emit_cstring("\t.weak_reference ");
471 be_emit_cstring("\t.weak ");
473 be_gas_emit_entity(entity);
475 be_emit_write_line();
478 static void emit_visibility(const ir_entity *entity)
480 ir_linkage linkage = get_entity_linkage(entity);
482 if (get_entity_linkage(entity) & IR_LINKAGE_WEAK) {
484 /* Note: .weak seems to imply .globl so no need to output .globl */
485 } else if (get_entity_visibility(entity) == ir_visibility_default) {
486 be_emit_cstring(".globl ");
487 be_gas_emit_entity(entity);
489 be_emit_write_line();
492 if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O
493 && (linkage & IR_LINKAGE_HIDDEN_USER)
494 && get_entity_ld_name(entity)[0] != '\0') {
495 be_emit_cstring("\t.no_dead_strip ");
496 be_gas_emit_entity(entity);
498 be_emit_write_line();
502 void be_gas_emit_function_prolog(const ir_entity *entity, unsigned po2alignment)
504 be_gas_section_t section = determine_section(NULL, entity);
505 emit_section(section, entity);
507 /* write the begin line (makes the life easier for scripts parsing the
509 be_emit_write_line();
510 be_emit_cstring("# -- Begin ");
511 be_gas_emit_entity(entity);
513 be_emit_write_line();
515 if (po2alignment > 0) {
516 const char *fill_byte = "";
517 unsigned maximum_skip = (1 << po2alignment) - 1;
518 /* gcc fills space between function with 0x90... */
519 if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) {
522 be_emit_cstring("\t.p2align ");
523 be_emit_irprintf("%u,%s,%u\n", po2alignment, fill_byte, maximum_skip);
524 be_emit_write_line();
526 emit_visibility(entity);
528 switch (be_gas_object_file_format) {
529 case OBJECT_FILE_FORMAT_ELF:
530 be_emit_cstring("\t.type\t");
531 be_gas_emit_entity(entity);
532 be_emit_cstring(", ");
533 be_emit_char(be_gas_elf_type_char);
534 be_emit_cstring("function\n");
535 be_emit_write_line();
537 case OBJECT_FILE_FORMAT_COFF:
538 be_emit_cstring("\t.def\t");
539 be_gas_emit_entity(entity);
540 be_emit_cstring(";");
541 if (get_entity_visibility(entity) == ir_visibility_local) {
542 be_emit_cstring("\t.scl\t3;");
544 be_emit_cstring("\t.scl\t2;");
546 be_emit_cstring("\t.type\t32;\t.endef\n");
547 be_emit_write_line();
549 case OBJECT_FILE_FORMAT_MACH_O:
552 be_gas_emit_entity(entity);
553 be_emit_cstring(":\n");
554 be_emit_write_line();
557 void be_gas_emit_function_epilog(const ir_entity *entity)
559 if (be_gas_object_file_format == OBJECT_FILE_FORMAT_ELF) {
560 be_emit_cstring("\t.size\t");
561 be_gas_emit_entity(entity);
562 be_emit_cstring(", .-");
563 be_gas_emit_entity(entity);
565 be_emit_write_line();
568 be_emit_cstring("# -- End ");
569 be_gas_emit_entity(entity);
571 be_emit_write_line();
577 * @param tv the tarval
578 * @param bytes the width of the tarvals value in bytes
580 static void emit_arith_tarval(ir_tarval *tv, int bytes)
584 be_emit_irprintf("0x%02x", get_tarval_sub_bits(tv, 0));
588 be_emit_irprintf("0x%02x%02x", get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
592 be_emit_irprintf("0x%02x%02x%02x%02x",
593 get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2), get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
597 be_emit_irprintf("0x%02x%02x%02x%02x%02x%02x%02x%02x",
598 get_tarval_sub_bits(tv, 7), get_tarval_sub_bits(tv, 6), get_tarval_sub_bits(tv, 5), get_tarval_sub_bits(tv, 4),
599 get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2), get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
603 /* Beware: Mixed endian output! One little endian number emitted as
604 * three longs. Each long initializer is written in big endian. */
606 "\t.long\t0x%02x%02x%02x%02x\n"
607 "\t.long\t0x%02x%02x%02x%02x\n"
608 "\t.long\t0x%02x%02x%02x%02x",
609 get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2),
610 get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0),
611 get_tarval_sub_bits(tv, 7), get_tarval_sub_bits(tv, 6),
612 get_tarval_sub_bits(tv, 5), get_tarval_sub_bits(tv, 4),
613 get_tarval_sub_bits(tv, 11), get_tarval_sub_bits(tv, 10),
614 get_tarval_sub_bits(tv, 9), get_tarval_sub_bits(tv, 8)
619 /* Beware: Mixed endian output! One little endian number emitted as
620 * three longs. Each long initializer is written in big endian. */
622 "\t.long\t0x%02x%02x%02x%02x\n"
623 "\t.long\t0x%02x%02x%02x%02x\n"
624 "\t.long\t0x%02x%02x%02x%02x\n"
625 "\t.long\t0x%02x%02x%02x%02x",
626 get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2),
627 get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0),
628 get_tarval_sub_bits(tv, 7), get_tarval_sub_bits(tv, 6),
629 get_tarval_sub_bits(tv, 5), get_tarval_sub_bits(tv, 4),
630 get_tarval_sub_bits(tv, 11), get_tarval_sub_bits(tv, 10),
631 get_tarval_sub_bits(tv, 9), get_tarval_sub_bits(tv, 8),
632 get_tarval_sub_bits(tv, 15), get_tarval_sub_bits(tv, 14),
633 get_tarval_sub_bits(tv, 13), get_tarval_sub_bits(tv, 12)
638 panic("Can't dump a tarval with %d bytes", bytes);
642 * Return the label prefix for labeled instructions.
644 const char *be_gas_insn_label_prefix(void)
650 * Return the tarval of an atomic initializer.
652 * @param init a node representing the initializer (on the const code irg)
656 static ir_tarval *get_atomic_init_tv(ir_node *init)
659 ir_mode *mode = get_irn_mode(init);
661 switch (get_irn_opcode(init)) {
664 init = get_Cast_op(init);
668 init = get_Conv_op(init);
672 return get_Const_tarval(init);
675 switch (get_SymConst_kind(init)) {
676 case symconst_type_size:
677 return new_tarval_from_long(get_type_size_bytes(get_SymConst_type(init)), mode);
679 case symconst_type_align:
680 return new_tarval_from_long(get_type_alignment_bytes(get_SymConst_type(init)), mode);
682 case symconst_ofs_ent:
683 return new_tarval_from_long(get_entity_offset(get_SymConst_entity(init)), mode);
685 case symconst_enum_const:
686 return get_enumeration_value(get_SymConst_enum(init));
699 * Dump an atomic value.
701 * @param env the gas output environment
702 * @param init a node representing the atomic value (on the const code irg)
704 static void do_emit_atomic_init(be_gas_decl_env_t *env, ir_node *init)
706 ir_mode *mode = get_irn_mode(init);
707 int bytes = get_mode_size_bytes(mode);
711 init = skip_Id(init);
713 switch (get_irn_opcode(init)) {
715 do_emit_atomic_init(env, get_Cast_op(init));
719 do_emit_atomic_init(env, get_Conv_op(init));
723 tv = get_Const_tarval(init);
725 /* it's an arithmetic value */
726 emit_arith_tarval(tv, bytes);
730 switch (get_SymConst_kind(init)) {
731 case symconst_addr_ent:
732 ent = get_SymConst_entity(init);
733 be_gas_emit_entity(ent);
736 case symconst_ofs_ent:
737 ent = get_SymConst_entity(init);
738 be_emit_irprintf("%d", get_entity_offset(ent));
741 case symconst_type_size:
742 be_emit_irprintf("%u", get_type_size_bytes(get_SymConst_type(init)));
745 case symconst_type_align:
746 be_emit_irprintf("%u", get_type_alignment_bytes(get_SymConst_type(init)));
749 case symconst_enum_const:
750 tv = get_enumeration_value(get_SymConst_enum(init));
751 emit_arith_tarval(tv, bytes);
755 assert(!"emit_atomic_init(): don't know how to init from this SymConst");
760 if (!mode_is_int(mode) && !mode_is_reference(mode)) {
761 panic("Constant must be int or pointer for '+' to work");
763 do_emit_atomic_init(env, get_Add_left(init));
764 be_emit_cstring(" + ");
765 do_emit_atomic_init(env, get_Add_right(init));
769 if (!mode_is_int(mode) && !mode_is_reference(mode)) {
770 panic("Constant must be int or pointer for '-' to work");
772 do_emit_atomic_init(env, get_Sub_left(init));
773 be_emit_cstring(" - ");
774 do_emit_atomic_init(env, get_Sub_right(init));
778 if (!mode_is_int(mode) && !mode_is_reference(mode)) {
779 panic("Constant must be int or pointer for '*' to work");
781 do_emit_atomic_init(env, get_Mul_left(init));
782 be_emit_cstring(" * ");
783 do_emit_atomic_init(env, get_Mul_right(init));
787 be_emit_cstring("0");
791 panic("emit_atomic_init(): unsupported IR-node %+F", init);
796 * Dumps the type for given size (.byte, .long, ...)
798 * @param size the size in bytes
800 static void emit_size_type(size_t size)
804 be_emit_cstring("\t.byte\t");
808 be_emit_cstring("\t.short\t");
812 be_emit_cstring("\t.long\t");
816 be_emit_cstring("\t.quad\t");
821 case 16: /* Note: .octa does not work on mac */
822 /* handled in arith */
826 panic("Try to dump a type with %u bytes", (unsigned)size);
831 * Emit an atomic value.
833 * @param env the gas output environment
834 * @param init a node representing the atomic value (on the const code irg)
836 static void emit_atomic_init(be_gas_decl_env_t *env, ir_node *init)
838 ir_mode *mode = get_irn_mode(init);
839 int bytes = get_mode_size_bytes(mode);
841 emit_size_type(bytes);
842 do_emit_atomic_init(env, init);
844 be_emit_write_line();
848 * Dump a string constant.
849 * No checks are made!!
851 * @param ent The entity to dump.
853 static void emit_string_cst(const ir_entity *ent)
861 len = get_compound_ent_n_values(ent);
863 if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) {
864 be_emit_cstring("\t.ascii \"");
866 be_emit_cstring("\t.string \"");
870 for (i = 0; i < output_len; ++i) {
874 irn = get_compound_ent_value(ent, i);
875 c = (int) get_tarval_long(get_Const_tarval(irn));
878 case '"' : be_emit_cstring("\\\""); break;
879 case '\n': be_emit_cstring("\\n"); break;
880 case '\r': be_emit_cstring("\\r"); break;
881 case '\t': be_emit_cstring("\\t"); break;
882 case '\\': be_emit_cstring("\\\\"); break;
887 be_emit_irprintf("\\%03o", c);
891 be_emit_cstring("\"\n");
892 be_emit_write_line();
894 type = get_entity_type(ent);
895 type_size = get_type_size_bytes(type);
896 remaining_space = type_size - len;
897 assert(remaining_space >= 0);
898 if (remaining_space > 0) {
899 be_emit_irprintf("\t.space\t%d, 0\n", remaining_space);
903 static size_t emit_string_initializer(const ir_initializer_t *initializer)
907 len = initializer->compound.n_initializers;
908 if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) {
909 be_emit_cstring("\t.ascii \"");
911 be_emit_cstring("\t.string \"");
915 for (i = 0; i < len; ++i) {
916 const ir_initializer_t *sub_initializer
917 = get_initializer_compound_value(initializer, i);
919 ir_tarval *tv = get_initializer_tarval(sub_initializer);
920 int c = get_tarval_long(tv);
923 case '"' : be_emit_cstring("\\\""); break;
924 case '\n': be_emit_cstring("\\n"); break;
925 case '\r': be_emit_cstring("\\r"); break;
926 case '\t': be_emit_cstring("\\t"); break;
927 case '\\': be_emit_cstring("\\\\"); break;
932 be_emit_irprintf("\\%03o", c);
936 be_emit_cstring("\"\n");
937 be_emit_write_line();
939 return initializer->compound.n_initializers;
942 typedef enum normal_or_bitfield_kind {
947 } normal_or_bitfield_kind;
950 normal_or_bitfield_kind kind;
954 unsigned char bf_val;
955 const ir_initializer_t *string;
957 } normal_or_bitfield;
959 static int is_type_variable_size(ir_type *type)
966 static size_t get_initializer_size(const ir_initializer_t *initializer,
969 switch (get_initializer_kind(initializer)) {
970 case IR_INITIALIZER_TARVAL:
971 assert(get_tarval_mode(get_initializer_tarval_value(initializer)) == get_type_mode(type));
972 return get_type_size_bytes(type);
973 case IR_INITIALIZER_CONST:
974 case IR_INITIALIZER_NULL:
975 return get_type_size_bytes(type);
976 case IR_INITIALIZER_COMPOUND:
977 if (!is_type_variable_size(type)) {
978 return get_type_size_bytes(type);
981 = get_initializer_compound_n_entries(initializer);
983 unsigned initializer_size = get_type_size_bytes(type);
984 for (i = 0; i < n_entries; ++i) {
985 ir_entity *entity = get_compound_member(type, i);
986 ir_type *type = get_entity_type(entity);
988 const ir_initializer_t *sub_initializer
989 = get_initializer_compound_value(initializer, i);
991 unsigned offset = get_entity_offset(entity);
992 unsigned size = get_initializer_size(sub_initializer, type);
994 if (offset + size > initializer_size) {
995 initializer_size = offset + size;
998 return initializer_size;
1002 panic("found invalid initializer");
1006 static normal_or_bitfield *glob_vals;
1007 static size_t max_vals;
1010 static void emit_bitfield(normal_or_bitfield *vals, size_t offset_bits,
1011 const ir_initializer_t *initializer, ir_type *type)
1013 static const size_t BITS_PER_BYTE = 8;
1014 ir_mode *mode = get_type_mode(type);
1015 ir_tarval *tv = NULL;
1019 bool big_endian = be_get_backend_param()->byte_order_big_endian;
1021 switch (get_initializer_kind(initializer)) {
1022 case IR_INITIALIZER_NULL:
1024 case IR_INITIALIZER_TARVAL:
1025 tv = get_initializer_tarval_value(initializer);
1027 case IR_INITIALIZER_CONST: {
1028 ir_node *node = get_initializer_const_value(initializer);
1029 if (!is_Const(node)) {
1030 panic("bitfield initializer not a Const node");
1032 tv = get_Const_tarval(node);
1035 case IR_INITIALIZER_COMPOUND:
1036 panic("bitfield initializer is compound");
1039 panic("Couldn't get numeric value for bitfield initializer");
1041 tv = tarval_convert_to(tv, get_type_mode(type));
1043 value_len = get_type_size_bytes(get_primitive_base_type(type));
1045 end = get_mode_size_bits(mode);
1046 while (bit_offset < end) {
1047 size_t src_offset = bit_offset / BITS_PER_BYTE;
1048 size_t src_offset_bits = bit_offset % BITS_PER_BYTE;
1049 size_t dst_offset = (bit_offset+offset_bits) / BITS_PER_BYTE;
1050 size_t dst_offset_bits = (bit_offset+offset_bits) % BITS_PER_BYTE;
1051 size_t src_bits_len = end-bit_offset;
1052 size_t dst_bits_len = BITS_PER_BYTE-dst_offset_bits;
1053 unsigned char curr_bits;
1054 normal_or_bitfield *val;
1055 if (src_bits_len > dst_bits_len)
1056 src_bits_len = dst_bits_len;
1059 val = &vals[value_len - dst_offset - 1];
1061 val = &vals[dst_offset];
1064 assert((val-glob_vals) < (ptrdiff_t) max_vals);
1065 assert(val->kind == BITFIELD ||
1066 (val->kind == NORMAL && val->v.value == NULL));
1067 val->kind = BITFIELD;
1068 curr_bits = get_tarval_sub_bits(tv, src_offset);
1069 curr_bits = curr_bits >> src_offset_bits;
1070 if (src_offset_bits + src_bits_len > 8) {
1071 unsigned next_bits = get_tarval_sub_bits(tv, src_offset+1);
1072 curr_bits |= next_bits << (8 - src_offset_bits);
1074 curr_bits &= (1 << src_bits_len) - 1;
1075 val->v.bf_val |= curr_bits << dst_offset_bits;
1077 bit_offset += dst_bits_len;
1081 static void emit_ir_initializer(normal_or_bitfield *vals,
1082 const ir_initializer_t *initializer,
1085 assert((size_t) (vals - glob_vals) < max_vals);
1087 if (initializer_is_string_const(initializer)) {
1088 assert(vals->kind != BITFIELD);
1089 vals->kind = STRING;
1090 vals->v.string = initializer;
1094 switch (get_initializer_kind(initializer)) {
1095 case IR_INITIALIZER_NULL:
1097 case IR_INITIALIZER_TARVAL: {
1100 assert(vals->kind != BITFIELD);
1101 vals->kind = TARVAL;
1102 vals->v.tarval = get_initializer_tarval_value(initializer);
1103 assert(get_type_mode(type) == get_tarval_mode(vals->v.tarval));
1104 for (i = 1; i < get_type_size_bytes(type); ++i) {
1105 vals[i].kind = NORMAL;
1106 vals[i].v.value = NULL;
1110 case IR_INITIALIZER_CONST: {
1113 assert(vals->kind != BITFIELD);
1114 vals->kind = NORMAL;
1115 vals->v.value = get_initializer_const_value(initializer);
1116 for (i = 1; i < get_type_size_bytes(type); ++i) {
1117 vals[i].kind = NORMAL;
1118 vals[i].v.value = NULL;
1122 case IR_INITIALIZER_COMPOUND: {
1124 size_t n = get_initializer_compound_n_entries(initializer);
1126 if (is_Array_type(type)) {
1127 ir_type *element_type = get_array_element_type(type);
1128 size_t skip = get_type_size_bytes(element_type);
1129 size_t alignment = get_type_alignment_bytes(element_type);
1130 size_t misalign = skip % alignment;
1131 if (misalign != 0) {
1132 skip += alignment - misalign;
1135 for (i = 0; i < n; ++i) {
1136 ir_initializer_t *sub_initializer
1137 = get_initializer_compound_value(initializer, i);
1139 emit_ir_initializer(vals, sub_initializer, element_type);
1144 size_t n_members, i;
1145 assert(is_compound_type(type));
1146 n_members = get_compound_n_members(type);
1147 for (i = 0; i < n_members; ++i) {
1148 ir_entity *member = get_compound_member(type, i);
1149 size_t offset = get_entity_offset(member);
1150 ir_type *subtype = get_entity_type(member);
1151 ir_mode *mode = get_type_mode(subtype);
1152 ir_initializer_t *sub_initializer;
1154 assert(i < get_initializer_compound_n_entries(initializer));
1156 = get_initializer_compound_value(initializer, i);
1160 = get_entity_offset_bits_remainder(member);
1162 if (is_Primitive_type(subtype)
1163 && get_primitive_base_type(subtype) != NULL) {
1164 emit_bitfield(&vals[offset], offset_bits,
1165 sub_initializer, subtype);
1168 assert(offset_bits == 0);
1172 emit_ir_initializer(&vals[offset], sub_initializer, subtype);
1179 panic("invalid ir_initializer kind found");
1182 static void emit_initializer(be_gas_decl_env_t *env, const ir_entity *entity)
1184 const ir_initializer_t *initializer = entity->initializer;
1186 normal_or_bitfield *vals;
1190 if (initializer_is_string_const(initializer)) {
1191 emit_string_initializer(initializer);
1195 type = get_entity_type(entity);
1196 size = get_initializer_size(initializer, type);
1202 * In the worst case, every initializer allocates one byte.
1203 * Moreover, initializer might be big, do not allocate on stack.
1205 vals = XMALLOCNZ(normal_or_bitfield, size);
1212 emit_ir_initializer(vals, initializer, type);
1214 /* now write values sorted */
1215 for (k = 0; k < size; ) {
1218 normal_or_bitfield_kind kind = vals[k].kind;
1221 if (vals[k].v.value != NULL) {
1222 emit_atomic_init(env, vals[k].v.value);
1223 elem_size = get_mode_size_bytes(get_irn_mode(vals[k].v.value));
1229 ir_tarval *tv = vals[k].v.tarval;
1230 size_t size = get_mode_size_bytes(get_tarval_mode(tv));
1235 emit_size_type(size);
1236 emit_arith_tarval(tv, size);
1238 be_emit_write_line();
1242 elem_size = emit_string_initializer(vals[k].v.string);
1245 be_emit_irprintf("\t.byte\t%d\n", vals[k].v.bf_val);
1246 be_emit_write_line();
1251 while (k < size && vals[k].kind == NORMAL && vals[k].v.value == NULL) {
1258 be_emit_irprintf("\t.space\t%d, 0\n", space);
1259 be_emit_write_line();
1265 static void emit_compound_graph_init(be_gas_decl_env_t *env,
1266 const ir_entity *ent)
1268 normal_or_bitfield *vals;
1270 unsigned k, last_ofs;
1272 if (entity_is_string_const(ent)) {
1273 emit_string_cst(ent);
1277 n = get_compound_ent_n_values(ent);
1279 /* Find the initializer size. Sorrily gcc support a nasty feature:
1280 The last field of a compound may be a flexible array. This allows
1281 initializers bigger than the type size. */
1282 last_ofs = get_type_size_bytes(get_entity_type(ent));
1283 for (i = 0; i < n; ++i) {
1284 unsigned offset = get_compound_ent_value_offset_bytes(ent, i);
1285 unsigned bits_remainder = get_compound_ent_value_offset_bit_remainder(ent, i);
1286 ir_node *value = get_compound_ent_value(ent, i);
1287 unsigned value_len = get_mode_size_bits(get_irn_mode(value));
1289 offset += (value_len + bits_remainder + 7) >> 3;
1291 if (offset > last_ofs) {
1297 * In the worst case, every initializer allocates one byte.
1298 * Moreover, initializer might be big, do not allocate on stack.
1300 vals = XMALLOCNZ(normal_or_bitfield, last_ofs);
1302 /* collect the values and store them at the offsets */
1303 for (i = 0; i < n; ++i) {
1304 unsigned offset = get_compound_ent_value_offset_bytes(ent, i);
1305 int offset_bits = get_compound_ent_value_offset_bit_remainder(ent, i);
1306 ir_node *value = get_compound_ent_value(ent, i);
1307 int value_len = get_mode_size_bits(get_irn_mode(value));
1309 assert(offset_bits >= 0);
1311 if (offset_bits != 0 ||
1312 (value_len != 8 && value_len != 16 && value_len != 32 && value_len != 64)) {
1313 ir_tarval *tv = get_atomic_init_tv(value);
1314 unsigned char curr_bits, last_bits = 0;
1316 panic("Couldn't get numeric value for bitfield initializer '%s'",
1317 get_entity_ld_name(ent));
1319 /* normalize offset */
1320 offset += offset_bits >> 3;
1323 for (j = 0; value_len + offset_bits > 0; ++j) {
1324 assert(offset + j < last_ofs);
1325 assert(vals[offset + j].kind == BITFIELD || vals[offset + j].v.value == NULL);
1326 vals[offset + j].kind = BITFIELD;
1327 curr_bits = get_tarval_sub_bits(tv, j);
1328 vals[offset + j].v.bf_val |= (last_bits >> (8 - offset_bits)) | (curr_bits << offset_bits);
1330 last_bits = curr_bits;
1335 assert(offset < last_ofs);
1336 assert(vals[offset].kind == NORMAL);
1337 for (i = 1; i < value_len / 8; ++i) {
1338 assert(vals[offset + i].v.value == NULL);
1340 vals[offset].v.value = value;
1344 /* now write them sorted */
1345 for (k = 0; k < last_ofs; ) {
1346 int space = 0, skip = 0;
1347 if (vals[k].kind == NORMAL) {
1348 if (vals[k].v.value != NULL) {
1349 emit_atomic_init(env, vals[k].v.value);
1350 skip = get_mode_size_bytes(get_irn_mode(vals[k].v.value)) - 1;
1355 assert(vals[k].kind == BITFIELD);
1356 be_emit_irprintf("\t.byte\t%d\n", vals[k].v.bf_val);
1360 while (k < last_ofs && vals[k].kind == NORMAL && vals[k].v.value == NULL) {
1369 be_emit_irprintf("\t.space\t%d, 0\n", space);
1370 be_emit_write_line();
1376 static void emit_align(unsigned p2alignment)
1378 be_emit_irprintf("\t.p2align\t%u\n", log2_floor(p2alignment));
1379 be_emit_write_line();
1382 static unsigned get_effective_entity_alignment(const ir_entity *entity)
1384 unsigned alignment = get_entity_alignment(entity);
1385 if (alignment == 0) {
1386 ir_type *type = get_entity_type(entity);
1387 alignment = get_type_alignment_bytes(type);
1392 static void emit_common(const ir_entity *entity)
1394 unsigned size = get_type_size_bytes(get_entity_type(entity));
1395 unsigned alignment = get_effective_entity_alignment(entity);
1397 if (get_entity_linkage(entity) & IR_LINKAGE_WEAK) {
1401 switch (be_gas_object_file_format) {
1402 case OBJECT_FILE_FORMAT_MACH_O:
1403 be_emit_cstring("\t.comm ");
1404 be_gas_emit_entity(entity);
1405 be_emit_irprintf(",%u,%u\n", size, log2_floor(alignment));
1406 be_emit_write_line();
1408 case OBJECT_FILE_FORMAT_ELF:
1409 be_emit_cstring("\t.comm ");
1410 be_gas_emit_entity(entity);
1411 be_emit_irprintf(",%u,%u\n", size, alignment);
1412 be_emit_write_line();
1414 case OBJECT_FILE_FORMAT_COFF:
1415 be_emit_cstring("\t.comm ");
1416 be_gas_emit_entity(entity);
1417 be_emit_irprintf(",%u # %u\n", size, alignment);
1418 be_emit_write_line();
1421 panic("invalid object file format");
1424 static void emit_local_common(const ir_entity *entity)
1426 unsigned size = get_type_size_bytes(get_entity_type(entity));
1427 unsigned alignment = get_effective_entity_alignment(entity);
1429 if (get_entity_linkage(entity) & IR_LINKAGE_WEAK) {
1433 switch (be_gas_object_file_format) {
1434 case OBJECT_FILE_FORMAT_MACH_O:
1435 be_emit_cstring("\t.lcomm ");
1436 be_gas_emit_entity(entity);
1437 be_emit_irprintf(",%u,%u\n", size, log2_floor(alignment));
1438 be_emit_write_line();
1440 case OBJECT_FILE_FORMAT_ELF:
1441 be_emit_cstring("\t.local ");
1442 be_gas_emit_entity(entity);
1443 be_emit_cstring("\n");
1444 be_emit_write_line();
1445 be_emit_cstring("\t.comm ");
1446 be_gas_emit_entity(entity);
1447 be_emit_irprintf(",%u,%u\n", size, alignment);
1448 be_emit_write_line();
1450 case OBJECT_FILE_FORMAT_COFF:
1451 be_emit_cstring("\t.lcomm ");
1452 be_gas_emit_entity(entity);
1453 be_emit_irprintf(",%u # %u\n", size, alignment);
1454 be_emit_write_line();
1457 panic("invalid object file format");
1460 static void emit_indirect_symbol(const ir_entity *entity, be_gas_section_t section)
1462 /* we can only do PIC code on macho so far */
1463 assert(be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O);
1465 be_gas_emit_entity(entity);
1466 be_emit_cstring(":\n");
1467 be_emit_write_line();
1468 be_emit_cstring("\t.indirect_symbol ");
1469 be_emit_ident(get_entity_ident(entity));
1471 be_emit_write_line();
1472 if (section == GAS_SECTION_PIC_TRAMPOLINES) {
1473 be_emit_cstring("\thlt ; hlt ; hlt ; hlt ; hlt\n");
1474 be_emit_write_line();
1476 assert(section == GAS_SECTION_PIC_SYMBOLS);
1477 be_emit_cstring("\t.long 0\n");
1478 be_emit_write_line();
1482 char const *be_gas_get_private_prefix(void)
1484 return be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O ? "L" : ".L";
1487 void be_gas_emit_entity(const ir_entity *entity)
1489 if (entity->type == firm_code_type) {
1490 ir_label_t label = get_entity_label(entity);
1491 be_emit_irprintf("%s_%lu", be_gas_get_private_prefix(), label);
1495 if (get_entity_visibility(entity) == ir_visibility_private) {
1496 be_emit_string(be_gas_get_private_prefix());
1498 be_emit_ident(get_entity_ld_ident(entity));
1501 void be_gas_emit_block_name(const ir_node *block)
1503 if (has_Block_entity(block)) {
1504 ir_entity *entity = get_Block_entity(block);
1505 be_gas_emit_entity(entity);
1507 be_emit_irprintf("%s%ld", be_gas_get_private_prefix(), get_irn_node_nr(block));
1512 * Dump a global entity.
1514 * @param env the gas output environment
1515 * @param ent the entity to be dumped
1517 static void emit_global(be_gas_decl_env_t *env, const ir_entity *entity)
1519 ir_type *type = get_entity_type(entity);
1520 ident *ld_ident = get_entity_ld_ident(entity);
1521 unsigned alignment = get_effective_entity_alignment(entity);
1522 be_gas_section_t section = determine_section(env, entity);
1523 ir_visibility visibility = get_entity_visibility(entity);
1524 ir_linkage linkage = get_entity_linkage(entity);
1526 /* block labels are already emittet in the code */
1527 if (type == firm_code_type)
1530 /* we already emitted all methods. Except for the trampolines which
1531 * the assembler/linker generates */
1532 if (is_Method_type(type) && section != GAS_SECTION_PIC_TRAMPOLINES) {
1533 /* functions with graph are already emitted with
1534 * be_gas_emit_function_prolog */
1535 if (get_entity_irg(entity) == NULL) {
1536 emit_visibility(entity);
1541 be_dbg_variable(entity);
1543 if (section == GAS_SECTION_BSS) {
1544 switch (visibility) {
1545 case ir_visibility_local:
1546 case ir_visibility_private:
1547 emit_local_common(entity);
1549 case ir_visibility_default:
1550 if (linkage & IR_LINKAGE_MERGE) {
1551 emit_common(entity);
1555 case ir_visibility_external:
1556 if (linkage & IR_LINKAGE_MERGE)
1557 panic("merge link semantic not supported for extern entities");
1562 emit_visibility(entity);
1563 if (visibility == ir_visibility_external) {
1564 /* nothing to do for externally defined values */
1568 if (!is_po2(alignment))
1569 panic("alignment not a power of 2");
1571 emit_section(section, entity);
1573 if (section == GAS_SECTION_PIC_TRAMPOLINES
1574 || section == GAS_SECTION_PIC_SYMBOLS) {
1575 emit_indirect_symbol(entity, section);
1580 if (alignment > 1) {
1581 emit_align(alignment);
1583 if (be_gas_object_file_format == OBJECT_FILE_FORMAT_ELF
1584 && be_gas_emit_types
1585 && visibility != ir_visibility_private) {
1586 be_emit_cstring("\t.type\t");
1587 be_gas_emit_entity(entity);
1588 be_emit_cstring(", ");
1589 be_emit_char(be_gas_elf_type_char);
1590 be_emit_cstring("object\n\t.size\t");\
1591 be_gas_emit_entity(entity);
1592 be_emit_irprintf(", %u\n", get_type_size_bytes(type));
1595 if (get_id_str(ld_ident)[0] != '\0') {
1596 be_gas_emit_entity(entity);
1597 be_emit_cstring(":\n");
1598 be_emit_write_line();
1601 if (entity_is_null(entity)) {
1602 unsigned size = get_type_size_bytes(type);
1604 be_emit_irprintf("\t.space %u, 0\n", get_type_size_bytes(type));
1605 be_emit_write_line();
1607 } else if (entity_has_compound_ent_values(entity)) {
1608 emit_compound_graph_init(env, entity);
1610 assert(entity->initializer != NULL);
1611 emit_initializer(env, entity);
1616 * Dumps declarations of global variables and the initialization code.
1618 * @param gt a global like type, either the global or the TLS one
1619 * @param env an environment
1621 static void be_gas_emit_globals(ir_type *gt, be_gas_decl_env_t *env)
1623 size_t i, n = get_compound_n_members(gt);
1625 for (i = 0; i < n; i++) {
1626 ir_entity *ent = get_compound_member(gt, i);
1627 emit_global(env, ent);
1631 /* Generate all entities. */
1632 void be_gas_emit_decls(const be_main_env_t *main_env)
1634 be_gas_decl_env_t env;
1635 memset(&env, 0, sizeof(env));
1637 /* dump global type */
1638 env.main_env = main_env;
1639 env.section = (be_gas_section_t) -1;
1641 be_gas_emit_globals(get_glob_type(), &env);
1642 be_gas_emit_globals(get_tls_type(), &env);
1643 be_gas_emit_globals(get_segment_type(IR_SEGMENT_CONSTRUCTORS), &env);
1644 be_gas_emit_globals(get_segment_type(IR_SEGMENT_DESTRUCTORS), &env);
1645 be_gas_emit_globals(main_env->pic_symbols_type, &env);
1646 be_gas_emit_globals(main_env->pic_trampolines_type, &env);
1649 * ".subsections_via_symbols marks object files which are OK to divide
1650 * their section contents into individual blocks".
1651 * From my understanding this means no label points in the middle of an
1652 * object which we want to address as a whole. Firm code should be fine
1655 if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) {
1656 be_emit_cstring("\t.subsections_via_symbols\n");
1657 be_emit_write_line();
1661 void emit_jump_table(const ir_node *node, long default_pn, ir_entity *entity,
1662 get_cfop_target_func get_cfop_target)
1664 long switch_max = LONG_MIN;
1665 ir_node *default_block = NULL;
1666 unsigned long length;
1667 const ir_edge_t *edge;
1671 /* go over all proj's and collect them */
1672 foreach_out_edge(node, edge) {
1673 ir_node *proj = get_edge_src_irn(edge);
1674 long pn = get_Proj_proj(proj);
1676 /* check for default proj */
1677 if (pn == default_pn) {
1678 assert(default_block == NULL); /* more than 1 default_pn? */
1679 default_block = get_cfop_target(proj);
1681 switch_max = pn > switch_max ? pn : switch_max;
1684 assert(switch_max > LONG_MIN);
1686 length = (unsigned long) switch_max + 1;
1687 /* the 16000 isn't a real limit of the architecture. But should protect us
1688 * from seamingly endless compiler runs */
1689 if (length > 16000) {
1690 /* switch lowerer should have broken this monster to pieces... */
1691 panic("too large switch encountered");
1694 table = XMALLOCNZ(ir_node*, length);
1695 foreach_out_edge(node, edge) {
1696 ir_node *proj = get_edge_src_irn(edge);
1697 long pn = get_Proj_proj(proj);
1698 if (pn == default_pn)
1701 table[pn] = get_cfop_target(proj);
1705 be_gas_emit_switch_section(GAS_SECTION_RODATA);
1706 be_emit_cstring("\t.align 4\n");
1707 be_gas_emit_entity(entity);
1708 be_emit_cstring(":\n");
1709 for (i = 0; i < length; ++i) {
1710 ir_node *block = table[i];
1712 block = default_block;
1713 be_emit_cstring("\t.long ");
1714 be_gas_emit_block_name(block);
1716 be_emit_write_line();
1718 be_gas_emit_switch_section(GAS_SECTION_TEXT);