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
44 #include "beemitter.h"
47 /** by default, we generate assembler code for the Linux gas */
48 object_file_format_t be_gas_object_file_format = OBJECT_FILE_FORMAT_ELF;
49 elf_variant_t be_gas_elf_variant = ELF_VARIANT_NORMAL;
50 bool be_gas_emit_types = true;
51 char be_gas_elf_type_char = '@';
53 static be_gas_section_t current_section = (be_gas_section_t) -1;
56 * An environment containing all needed dumper data.
57 * Currently we create the file completely in memory first, then
58 * write it to the disk. This is an artifact from the old C-generating backend
59 * and even there NOT needed. So we might change it in the future.
61 typedef struct be_gas_decl_env {
62 be_gas_section_t section;
63 const be_main_env_t *main_env;
66 static void emit_section_macho(be_gas_section_t section)
68 be_gas_section_t base = section & GAS_SECTION_TYPE_MASK;
69 be_gas_section_t flags = section & ~GAS_SECTION_TYPE_MASK;
72 if (current_section == section)
74 current_section = section;
79 case GAS_SECTION_TEXT: name = "text"; break;
80 case GAS_SECTION_DATA: name = "data"; break;
81 case GAS_SECTION_RODATA: name = "const"; break;
82 case GAS_SECTION_BSS: name = "data"; break;
83 case GAS_SECTION_CONSTRUCTORS: name = "mod_init_func"; break;
84 case GAS_SECTION_DESTRUCTORS: name = "mod_term_func"; break;
85 case GAS_SECTION_PIC_TRAMPOLINES: name = "section\t__IMPORT,__jump_table,symbol_stubs,self_modifying_code+pure_instructions,5"; break;
86 case GAS_SECTION_PIC_SYMBOLS: name = "section\t__IMPORT,__pointers,non_lazy_symbol_pointers"; break;
87 case GAS_SECTION_CSTRING: name = "cstring"; break;
88 case GAS_SECTION_DEBUG_INFO: name = "section __DWARF,__debug_info,regular,debug"; break;
89 case GAS_SECTION_DEBUG_ABBREV: name = "section __DWARF,__debug_abbrev,regular,debug"; break;
90 case GAS_SECTION_DEBUG_LINE: name = "section __DWARF,__debug_line,regular,debug"; break;
91 case GAS_SECTION_DEBUG_PUBNAMES: name = "section __DWARF,__debug_pubnames,regular,debug"; break;
92 case GAS_SECTION_DEBUG_FRAME: name = "section __DWARF,__debug_frame,regular,debug"; break;
93 default: panic("unsupported scetion type 0x%X", section);
95 be_emit_irprintf("\t.%s\n", name);
97 } else if (flags & GAS_SECTION_FLAG_COMDAT) {
99 case GAS_SECTION_TEXT: name = "section __TEXT,__textcoal_nt,coalesced,pure_instructions"; break;
100 case GAS_SECTION_BSS:
101 case GAS_SECTION_DATA: name = "section __DATA,__datacoal_nt,coalesced"; break;
102 case GAS_SECTION_RODATA: name = "section __TEXT,__const_coal,coalesced"; break;
103 case GAS_SECTION_CSTRING: name = "section __TEXT,__const_coal,coalesced"; break;
104 default: panic("unsupported scetion type 0x%X", section);
106 } else if (flags & GAS_SECTION_FLAG_TLS) {
107 panic("thread local storage not supported on macho (section 0x%X)", section);
109 panic("unsupported section type 0x%X", section);
113 static void emit_section_sparc(be_gas_section_t section, const ir_entity *entity)
115 be_gas_section_t base = section & GAS_SECTION_TYPE_MASK;
116 be_gas_section_t flags = section & ~GAS_SECTION_TYPE_MASK;
117 static const char *const basename[GAS_SECTION_LAST+1] = {
125 NULL, /* pic trampolines */
126 NULL, /* pic symbols */
134 if (current_section == section && !(section & GAS_SECTION_FLAG_COMDAT))
136 current_section = section;
138 be_emit_cstring("\t.section\t\".");
140 /* Part1: section-name */
141 if (flags & GAS_SECTION_FLAG_TLS)
143 assert(base < (be_gas_section_t)ARRAY_SIZE(basename));
144 be_emit_string(basename[base]);
146 if (flags & GAS_SECTION_FLAG_COMDAT) {
148 be_gas_emit_entity(entity);
152 /* for the simple sections we're done here */
156 be_emit_cstring(",#alloc");
159 case GAS_SECTION_TEXT: be_emit_cstring(",#execinstr"); break;
160 case GAS_SECTION_DATA:
161 case GAS_SECTION_BSS: be_emit_cstring(",#write"); break;
166 if (flags & GAS_SECTION_FLAG_TLS) {
167 be_emit_cstring(",#tls");
172 be_emit_write_line();
175 static void emit_section(be_gas_section_t section, const ir_entity *entity)
177 be_gas_section_t base = section & GAS_SECTION_TYPE_MASK;
178 be_gas_section_t flags = section & ~GAS_SECTION_TYPE_MASK;
180 static const struct {
184 } sectioninfos[GAS_SECTION_LAST+1] = {
185 { "text", "progbits", "ax" },
186 { "data", "progbits", "aw" },
187 { "rodata", "progbits", "a" },
188 { "bss", "nobits", "aw" },
189 { "ctors", "progbits", "aw" },
190 { "dtors", "progbits", "aw" },
191 { NULL, NULL, NULL }, /* cstring */
192 { NULL, NULL, NULL }, /* pic trampolines */
193 { NULL, NULL, NULL }, /* pic symbols */
194 { "debug_info", "progbits", "" },
195 { "debug_abbrev", "progbits", "" },
196 { "debug_line", "progbits", "" },
197 { "debug_pubnames", "progbits", "" },
198 { "debug_frame", "progbits", "" },
201 if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) {
202 emit_section_macho(section);
204 } else if(be_gas_elf_variant == ELF_VARIANT_SPARC) {
205 emit_section_sparc(section, entity);
209 if (current_section == section && !(section & GAS_SECTION_FLAG_COMDAT))
211 current_section = section;
216 case GAS_SECTION_TEXT:
217 be_emit_cstring("\t.text\n");
218 be_emit_write_line();
220 case GAS_SECTION_DATA:
221 be_emit_cstring("\t.data\n");
222 be_emit_write_line();
224 case GAS_SECTION_RODATA:
225 be_emit_cstring("\t.section\t.rodata\n");
226 be_emit_write_line();
228 case GAS_SECTION_BSS:
229 be_emit_cstring("\t.bss\n");
230 be_emit_write_line();
237 assert(base < (be_gas_section_t) ARRAY_SIZE(sectioninfos));
238 be_emit_cstring("\t.section\t.");
240 if (flags & GAS_SECTION_FLAG_TLS)
242 be_emit_string(sectioninfos[base].name);
243 if (flags & GAS_SECTION_FLAG_COMDAT) {
245 be_gas_emit_entity(entity);
249 be_emit_cstring(",\"");
250 for (f = sectioninfos[base].flags; *f != '\0'; ++f) {
253 if (flags & GAS_SECTION_FLAG_TLS)
255 if (flags & GAS_SECTION_FLAG_COMDAT)
259 if (be_gas_object_file_format != OBJECT_FILE_FORMAT_COFF) {
260 be_emit_cstring("\",");
261 be_emit_char(be_gas_elf_type_char);
262 be_emit_string(sectioninfos[base].type);
265 if (flags & GAS_SECTION_FLAG_COMDAT) {
267 be_gas_emit_entity(entity);
268 be_emit_cstring(",comdat");
271 be_emit_write_line();
276 void be_gas_emit_switch_section(be_gas_section_t section)
278 /* you have to produce a switch_section call with entity manually
279 * for comdat sections */
280 assert( !(section & GAS_SECTION_FLAG_COMDAT));
282 emit_section(section, NULL);
285 static ir_tarval *get_initializer_tarval(const ir_initializer_t *initializer)
287 if (initializer->kind == IR_INITIALIZER_TARVAL)
288 return initializer->tarval.value;
289 if (initializer->kind == IR_INITIALIZER_CONST) {
290 ir_node *node = initializer->consti.value;
291 if (is_Const(node)) {
292 return get_Const_tarval(node);
295 return get_tarval_undefined();
298 static bool initializer_is_string_const(const ir_initializer_t *initializer)
301 bool found_printable = false;
303 if (initializer->kind != IR_INITIALIZER_COMPOUND)
306 len = initializer->compound.n_initializers;
309 for (i = 0; i < len; ++i) {
313 ir_initializer_t *sub_initializer
314 = initializer->compound.initializers[i];
316 tv = get_initializer_tarval(sub_initializer);
317 if (!tarval_is_constant(tv))
320 mode = get_tarval_mode(tv);
321 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
324 c = get_tarval_long(tv);
325 if (isgraph(c) || isspace(c))
326 found_printable = true;
330 if (i == len - 1 && c != '\0')
334 return found_printable;
337 static bool initializer_is_null(const ir_initializer_t *initializer)
339 switch (initializer->kind) {
340 case IR_INITIALIZER_NULL:
342 case IR_INITIALIZER_TARVAL: {
343 ir_tarval *tv = initializer->tarval.value;
344 return tarval_is_null(tv);
346 case IR_INITIALIZER_CONST: {
347 ir_node *value = initializer->consti.value;
348 if (!is_Const(value))
350 return is_Const_null(value);
352 case IR_INITIALIZER_COMPOUND: {
354 for (i = 0; i < initializer->compound.n_initializers; ++i) {
355 ir_initializer_t *subinitializer
356 = initializer->compound.initializers[i];
357 if (!initializer_is_null(subinitializer))
363 panic("invalid initializer in initializer_is_null");
367 * Determine if an entity is a string constant
368 * @param ent The entity
369 * @return 1 if it is a string constant, 0 otherwise
371 static int entity_is_string_const(const ir_entity *ent)
373 ir_type *type, *element_type;
377 type = get_entity_type(ent);
379 /* if it's an array */
380 if (!is_Array_type(type))
383 element_type = get_array_element_type(type);
385 /* and the array's element type is primitive */
386 if (!is_Primitive_type(element_type))
389 /* and the mode of the element type is an int of
390 * the same size as the byte mode */
391 mode = get_type_mode(element_type);
392 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
395 if (ent->initializer != NULL) {
396 return initializer_is_string_const(ent->initializer);
397 } else if (entity_has_compound_ent_values(ent)) {
398 int found_printable = 0;
399 /* if it contains only printable chars and a 0 at the end */
400 n = get_compound_ent_n_values(ent);
401 for (i = 0; i < n; ++i) {
402 ir_node *irn = get_compound_ent_value(ent, i);
406 c = (int) get_tarval_long(get_Const_tarval(irn));
408 if (isgraph(c) || isspace(c))
413 if (i == n - 1 && c != '\0')
416 return found_printable;
422 static bool entity_is_null(const ir_entity *entity)
424 ir_initializer_t *initializer = get_entity_initializer(entity);
425 return initializer == NULL || initializer_is_null(initializer);
428 static bool is_comdat(const ir_entity *entity)
430 ir_linkage linkage = get_entity_linkage(entity);
431 return (linkage & IR_LINKAGE_MERGE)
432 && (linkage & IR_LINKAGE_GARBAGE_COLLECT);
435 static be_gas_section_t determine_basic_section(const ir_entity *entity)
439 if (is_method_entity(entity))
440 return GAS_SECTION_TEXT;
442 linkage = get_entity_linkage(entity);
443 if (linkage & IR_LINKAGE_CONSTANT) {
444 /* mach-o is the only one with a cstring section */
445 if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O
446 && entity_is_string_const(entity))
447 return GAS_SECTION_CSTRING;
449 return GAS_SECTION_RODATA;
451 if (entity_is_null(entity))
452 return GAS_SECTION_BSS;
454 return GAS_SECTION_DATA;
457 static be_gas_section_t determine_section(be_gas_decl_env_t *env,
458 const ir_entity *entity)
460 ir_type *owner = get_entity_owner(entity);
462 if (owner == get_segment_type(IR_SEGMENT_GLOBAL)) {
463 be_gas_section_t section = determine_basic_section(entity);
464 if (is_comdat(entity))
465 section |= GAS_SECTION_FLAG_COMDAT;
467 } else if (env != NULL && owner == env->main_env->pic_symbols_type) {
468 return GAS_SECTION_PIC_SYMBOLS;
469 } else if (env != NULL && owner == env->main_env->pic_trampolines_type) {
470 return GAS_SECTION_PIC_TRAMPOLINES;
471 } else if (owner == get_segment_type(IR_SEGMENT_CONSTRUCTORS)) {
472 return GAS_SECTION_CONSTRUCTORS;
473 } else if (owner == get_segment_type(IR_SEGMENT_DESTRUCTORS)) {
474 return GAS_SECTION_DESTRUCTORS;
475 } else if (owner == get_segment_type(IR_SEGMENT_THREAD_LOCAL)) {
476 be_gas_section_t section = determine_basic_section(entity);
477 if (is_comdat(entity))
478 section |= GAS_SECTION_FLAG_COMDAT;
480 return section | GAS_SECTION_FLAG_TLS;
483 /* the java frontend keeps some functions inside classes */
484 if (is_Class_type(owner)) {
485 return determine_basic_section(entity);
488 panic("Couldn't determine section for %+F?!?", entity);
491 static void emit_weak(const ir_entity *entity)
493 if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) {
494 be_emit_cstring("\t.weak_reference ");
496 be_emit_cstring("\t.weak ");
498 be_gas_emit_entity(entity);
500 be_emit_write_line();
503 static void emit_visibility(const ir_entity *entity)
505 ir_linkage const linkage = get_entity_linkage(entity);
507 if (linkage & IR_LINKAGE_WEAK) {
509 /* Note: .weak seems to imply .globl so no need to output .globl */
510 } else if (get_entity_visibility(entity) == ir_visibility_external
511 && entity_has_definition(entity)) {
512 be_emit_cstring("\t.globl ");
513 be_gas_emit_entity(entity);
515 be_emit_write_line();
518 if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O
519 && (linkage & IR_LINKAGE_HIDDEN_USER)
520 && get_entity_ld_name(entity)[0] != '\0') {
521 be_emit_cstring("\t.no_dead_strip ");
522 be_gas_emit_entity(entity);
524 be_emit_write_line();
528 void be_gas_emit_function_prolog(const ir_entity *entity, unsigned po2alignment, const parameter_dbg_info_t *parameter_infos)
530 be_gas_section_t section;
532 be_dwarf_method_before(entity, parameter_infos);
534 section = determine_section(NULL, entity);
535 emit_section(section, entity);
537 /* write the begin line (makes the life easier for scripts parsing the
539 be_emit_cstring("# -- Begin ");
540 be_gas_emit_entity(entity);
542 be_emit_write_line();
544 if (po2alignment > 0) {
545 const char *fill_byte = "";
546 unsigned maximum_skip = (1 << po2alignment) - 1;
547 /* gcc fills space between function with 0x90... */
548 if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) {
551 be_emit_cstring("\t.p2align ");
552 be_emit_irprintf("%u,%s,%u\n", po2alignment, fill_byte, maximum_skip);
553 be_emit_write_line();
555 emit_visibility(entity);
557 switch (be_gas_object_file_format) {
558 case OBJECT_FILE_FORMAT_ELF:
559 be_emit_cstring("\t.type\t");
560 be_gas_emit_entity(entity);
561 be_emit_cstring(", ");
562 be_emit_char(be_gas_elf_type_char);
563 be_emit_cstring("function\n");
564 be_emit_write_line();
566 case OBJECT_FILE_FORMAT_COFF:
567 be_emit_cstring("\t.def\t");
568 be_gas_emit_entity(entity);
569 be_emit_cstring(";");
570 if (get_entity_visibility(entity) == ir_visibility_local) {
571 be_emit_cstring("\t.scl\t3;");
573 be_emit_cstring("\t.scl\t2;");
575 be_emit_cstring("\t.type\t32;\t.endef\n");
576 be_emit_write_line();
578 case OBJECT_FILE_FORMAT_MACH_O:
581 be_gas_emit_entity(entity);
582 be_emit_cstring(":\n");
583 be_emit_write_line();
585 be_dwarf_method_begin();
588 void be_gas_emit_function_epilog(const ir_entity *entity)
590 be_dwarf_method_end();
592 if (be_gas_object_file_format == OBJECT_FILE_FORMAT_ELF) {
593 be_emit_cstring("\t.size\t");
594 be_gas_emit_entity(entity);
595 be_emit_cstring(", .-");
596 be_gas_emit_entity(entity);
598 be_emit_write_line();
601 be_emit_cstring("# -- End ");
602 be_gas_emit_entity(entity);
604 be_emit_write_line();
607 be_emit_write_line();
613 * @param tv the tarval
614 * @param bytes the width of the tarvals value in bytes
616 static void emit_arith_tarval(ir_tarval *tv, unsigned bytes)
620 be_emit_irprintf("0x%02x", get_tarval_sub_bits(tv, 0));
624 be_emit_irprintf("0x%02x%02x",
625 get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
629 be_emit_irprintf("0x%02x%02x%02x%02x",
630 get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2),
631 get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
635 be_emit_irprintf("0x%02x%02x%02x%02x%02x%02x%02x%02x",
636 get_tarval_sub_bits(tv, 7), get_tarval_sub_bits(tv, 6),
637 get_tarval_sub_bits(tv, 5), get_tarval_sub_bits(tv, 4),
638 get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2),
639 get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
643 panic("Can't dump a tarval with %d bytes", bytes);
647 * Return the label prefix for labeled instructions.
649 const char *be_gas_insn_label_prefix(void)
655 * Return the tarval of an atomic initializer.
657 * @param init a node representing the initializer (on the const code irg)
661 static ir_tarval *get_atomic_init_tv(ir_node *init)
664 ir_mode *mode = get_irn_mode(init);
666 switch (get_irn_opcode(init)) {
669 init = get_Cast_op(init);
673 init = get_Conv_op(init);
677 return get_Const_tarval(init);
680 switch (get_SymConst_kind(init)) {
681 case symconst_type_size:
682 return new_tarval_from_long(get_type_size_bytes(get_SymConst_type(init)), mode);
684 case symconst_type_align:
685 return new_tarval_from_long(get_type_alignment_bytes(get_SymConst_type(init)), mode);
687 case symconst_ofs_ent:
688 return new_tarval_from_long(get_entity_offset(get_SymConst_entity(init)), mode);
690 case symconst_enum_const:
691 return get_enumeration_value(get_SymConst_enum(init));
704 * Dump an atomic value.
706 * @param env the gas output environment
707 * @param init a node representing the atomic value (on the const code irg)
709 static void emit_init_expression(be_gas_decl_env_t *env, ir_node *init)
711 ir_mode *mode = get_irn_mode(init);
712 int bytes = get_mode_size_bytes(mode);
716 init = skip_Id(init);
718 switch (get_irn_opcode(init)) {
720 emit_init_expression(env, get_Cast_op(init));
724 emit_init_expression(env, get_Conv_op(init));
728 tv = get_Const_tarval(init);
730 /* it's an arithmetic value */
731 emit_arith_tarval(tv, bytes);
735 switch (get_SymConst_kind(init)) {
736 case symconst_addr_ent:
737 ent = get_SymConst_entity(init);
738 be_gas_emit_entity(ent);
741 case symconst_ofs_ent:
742 ent = get_SymConst_entity(init);
743 be_emit_irprintf("%d", get_entity_offset(ent));
746 case symconst_type_size:
747 be_emit_irprintf("%u", get_type_size_bytes(get_SymConst_type(init)));
750 case symconst_type_align:
751 be_emit_irprintf("%u", get_type_alignment_bytes(get_SymConst_type(init)));
754 case symconst_enum_const:
755 tv = get_enumeration_value(get_SymConst_enum(init));
756 emit_arith_tarval(tv, bytes);
760 assert(!"emit_atomic_init(): don't know how to init from this SymConst");
765 if (!mode_is_int(mode) && !mode_is_reference(mode)) {
766 panic("Constant must be int or pointer for '+' to work");
768 emit_init_expression(env, get_Add_left(init));
769 be_emit_cstring(" + ");
770 emit_init_expression(env, get_Add_right(init));
774 if (!mode_is_int(mode) && !mode_is_reference(mode)) {
775 panic("Constant must be int or pointer for '-' to work");
777 emit_init_expression(env, get_Sub_left(init));
778 be_emit_cstring(" - ");
779 emit_init_expression(env, get_Sub_right(init));
783 if (!mode_is_int(mode) && !mode_is_reference(mode)) {
784 panic("Constant must be int or pointer for '*' to work");
786 emit_init_expression(env, get_Mul_left(init));
787 be_emit_cstring(" * ");
788 emit_init_expression(env, get_Mul_right(init));
792 be_emit_cstring("0");
796 panic("emit_atomic_init(): unsupported IR-node %+F", init);
801 * Dumps the type for given size (.byte, .long, ...)
803 * @param size the size in bytes
805 static void emit_size_type(size_t size)
808 case 1: be_emit_cstring("\t.byte\t"); break;
809 case 2: be_emit_cstring("\t.short\t"); break;
810 case 4: be_emit_cstring("\t.long\t"); break;
811 case 8: be_emit_cstring("\t.quad\t"); break;
814 panic("Try to dump a type with %u bytes", (unsigned)size);
819 * Dump a string constant.
820 * No checks are made!!
822 * @param ent The entity to dump.
824 static void emit_string_cst(const ir_entity *ent)
832 len = get_compound_ent_n_values(ent);
834 if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) {
835 be_emit_cstring("\t.ascii \"");
837 be_emit_cstring("\t.string \"");
841 for (i = 0; i < output_len; ++i) {
845 irn = get_compound_ent_value(ent, i);
846 c = (int) get_tarval_long(get_Const_tarval(irn));
849 case '"' : be_emit_cstring("\\\""); break;
850 case '\n': be_emit_cstring("\\n"); break;
851 case '\r': be_emit_cstring("\\r"); break;
852 case '\t': be_emit_cstring("\\t"); break;
853 case '\\': be_emit_cstring("\\\\"); break;
858 be_emit_irprintf("\\%03o", c);
862 be_emit_cstring("\"\n");
863 be_emit_write_line();
865 type = get_entity_type(ent);
866 type_size = get_type_size_bytes(type);
867 remaining_space = type_size - len;
868 assert(remaining_space >= 0);
869 if (remaining_space > 0) {
870 be_emit_irprintf("\t.space\t%d, 0\n", remaining_space);
874 static size_t emit_string_initializer(const ir_initializer_t *initializer)
878 len = initializer->compound.n_initializers;
879 if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) {
880 be_emit_cstring("\t.ascii \"");
882 be_emit_cstring("\t.string \"");
886 for (i = 0; i < len; ++i) {
887 const ir_initializer_t *sub_initializer
888 = get_initializer_compound_value(initializer, i);
890 ir_tarval *tv = get_initializer_tarval(sub_initializer);
891 int c = get_tarval_long(tv);
894 case '"' : be_emit_cstring("\\\""); break;
895 case '\n': be_emit_cstring("\\n"); break;
896 case '\r': be_emit_cstring("\\r"); break;
897 case '\t': be_emit_cstring("\\t"); break;
898 case '\\': be_emit_cstring("\\\\"); break;
903 be_emit_irprintf("\\%03o", c);
907 be_emit_cstring("\"\n");
908 be_emit_write_line();
910 return initializer->compound.n_initializers;
913 typedef enum normal_or_bitfield_kind {
918 } normal_or_bitfield_kind;
921 normal_or_bitfield_kind kind;
926 unsigned char bf_val;
927 const ir_initializer_t *string;
929 } normal_or_bitfield;
931 static size_t get_initializer_size(const ir_initializer_t *initializer,
934 switch (get_initializer_kind(initializer)) {
935 case IR_INITIALIZER_TARVAL:
936 assert(get_tarval_mode(get_initializer_tarval_value(initializer)) == get_type_mode(type));
937 return get_type_size_bytes(type);
938 case IR_INITIALIZER_CONST:
939 case IR_INITIALIZER_NULL:
940 return get_type_size_bytes(type);
941 case IR_INITIALIZER_COMPOUND:
942 if (is_Array_type(type)) {
943 if (is_array_variable_size(type)) {
944 ir_type *element_type = get_array_element_type(type);
945 unsigned element_size = get_type_size_bytes(element_type);
946 unsigned element_align
947 = get_type_alignment_bytes(element_type);
948 unsigned misalign = element_size % element_align;
950 = get_initializer_compound_n_entries(initializer);
951 element_size += element_align - misalign;
952 return n_inits * element_size;
954 return get_type_size_bytes(type);
957 assert(is_compound_type(type));
958 size_t size = get_type_size_bytes(type);
959 if (is_compound_variable_size(type)) {
960 /* last initializer has to be an array of variable size */
961 size_t l = get_initializer_compound_n_entries(initializer)-1;
962 const ir_initializer_t *last
963 = get_initializer_compound_value(initializer, l);
964 const ir_entity *last_ent = get_compound_member(type, l);
965 ir_type *last_type = get_entity_type(last_ent);
966 assert(is_array_variable_size(last_type));
967 size += get_initializer_size(last, last_type);
973 panic("found invalid initializer");
977 static normal_or_bitfield *glob_vals;
978 static size_t max_vals;
981 static void emit_bitfield(normal_or_bitfield *vals, size_t offset_bits,
982 const ir_initializer_t *initializer, ir_type *type)
984 static const size_t BITS_PER_BYTE = 8;
985 ir_mode *mode = get_type_mode(type);
986 ir_tarval *tv = NULL;
990 bool big_endian = be_get_backend_param()->byte_order_big_endian;
992 switch (get_initializer_kind(initializer)) {
993 case IR_INITIALIZER_NULL:
995 case IR_INITIALIZER_TARVAL:
996 tv = get_initializer_tarval_value(initializer);
998 case IR_INITIALIZER_CONST: {
999 ir_node *node = get_initializer_const_value(initializer);
1000 if (!is_Const(node)) {
1001 panic("bitfield initializer not a Const node");
1003 tv = get_Const_tarval(node);
1006 case IR_INITIALIZER_COMPOUND:
1007 panic("bitfield initializer is compound");
1010 panic("Couldn't get numeric value for bitfield initializer");
1012 tv = tarval_convert_to(tv, get_type_mode(type));
1014 value_len = get_type_size_bytes(get_primitive_base_type(type));
1016 end = get_mode_size_bits(mode);
1017 while (bit_offset < end) {
1018 size_t src_offset = bit_offset / BITS_PER_BYTE;
1019 size_t src_offset_bits = bit_offset % BITS_PER_BYTE;
1020 size_t dst_offset = (bit_offset+offset_bits) / BITS_PER_BYTE;
1021 size_t dst_offset_bits = (bit_offset+offset_bits) % BITS_PER_BYTE;
1022 size_t src_bits_len = end-bit_offset;
1023 size_t dst_bits_len = BITS_PER_BYTE-dst_offset_bits;
1024 unsigned char curr_bits;
1025 normal_or_bitfield *val;
1026 if (src_bits_len > dst_bits_len)
1027 src_bits_len = dst_bits_len;
1030 val = &vals[value_len - dst_offset - 1];
1032 val = &vals[dst_offset];
1035 assert((val-glob_vals) < (ptrdiff_t) max_vals);
1036 assert(val->kind == BITFIELD ||
1037 (val->kind == NORMAL && val->v.value == NULL));
1038 val->kind = BITFIELD;
1039 curr_bits = get_tarval_sub_bits(tv, src_offset);
1040 curr_bits = curr_bits >> src_offset_bits;
1041 if (src_offset_bits + src_bits_len > 8) {
1042 unsigned next_bits = get_tarval_sub_bits(tv, src_offset+1);
1043 curr_bits |= next_bits << (8 - src_offset_bits);
1045 curr_bits &= (1 << src_bits_len) - 1;
1046 val->v.bf_val |= curr_bits << dst_offset_bits;
1048 bit_offset += dst_bits_len;
1052 static void emit_ir_initializer(normal_or_bitfield *vals,
1053 const ir_initializer_t *initializer,
1056 assert((size_t) (vals - glob_vals) < max_vals);
1058 if (initializer_is_string_const(initializer)) {
1059 assert(vals->kind != BITFIELD);
1060 vals->kind = STRING;
1061 vals->v.string = initializer;
1065 switch (get_initializer_kind(initializer)) {
1066 case IR_INITIALIZER_NULL:
1068 case IR_INITIALIZER_TARVAL: {
1071 assert(vals->kind != BITFIELD);
1072 vals->kind = TARVAL;
1074 vals->v.tarval = get_initializer_tarval_value(initializer);
1075 assert(get_type_mode(type) == get_tarval_mode(vals->v.tarval));
1076 for (i = 1; i < get_type_size_bytes(type); ++i) {
1077 vals[i].kind = NORMAL;
1078 vals[i].type = NULL;
1079 vals[i].v.value = NULL;
1083 case IR_INITIALIZER_CONST: {
1086 assert(vals->kind != BITFIELD);
1087 vals->kind = NORMAL;
1089 vals->v.value = get_initializer_const_value(initializer);
1090 for (i = 1; i < get_type_size_bytes(type); ++i) {
1091 vals[i].kind = NORMAL;
1092 vals[i].type = NULL;
1093 vals[i].v.value = NULL;
1097 case IR_INITIALIZER_COMPOUND: {
1099 size_t n = get_initializer_compound_n_entries(initializer);
1101 if (is_Array_type(type)) {
1102 ir_type *element_type = get_array_element_type(type);
1103 size_t skip = get_type_size_bytes(element_type);
1104 size_t alignment = get_type_alignment_bytes(element_type);
1105 size_t misalign = skip % alignment;
1106 if (misalign != 0) {
1107 skip += alignment - misalign;
1110 for (i = 0; i < n; ++i) {
1111 ir_initializer_t *sub_initializer
1112 = get_initializer_compound_value(initializer, i);
1114 emit_ir_initializer(vals, sub_initializer, element_type);
1119 size_t n_members, i;
1120 assert(is_compound_type(type));
1121 n_members = get_compound_n_members(type);
1122 for (i = 0; i < n_members; ++i) {
1123 ir_entity *member = get_compound_member(type, i);
1124 size_t offset = get_entity_offset(member);
1125 ir_type *subtype = get_entity_type(member);
1126 ir_mode *mode = get_type_mode(subtype);
1127 ir_initializer_t *sub_initializer;
1129 assert(i < get_initializer_compound_n_entries(initializer));
1131 = get_initializer_compound_value(initializer, i);
1135 = get_entity_offset_bits_remainder(member);
1137 if (is_Primitive_type(subtype)
1138 && get_primitive_base_type(subtype) != NULL) {
1139 emit_bitfield(&vals[offset], offset_bits,
1140 sub_initializer, subtype);
1143 assert(offset_bits == 0);
1147 emit_ir_initializer(&vals[offset], sub_initializer, subtype);
1154 panic("invalid ir_initializer kind found");
1157 static void emit_tarval_data(ir_type *type, ir_tarval *tv)
1159 size_t size = get_type_size_bytes(type);
1161 /* this should be an x86 extended float */
1162 assert(be_get_backend_param()->byte_order_big_endian == 0);
1164 /* Beware: Mixed endian output! One little endian number emitted as
1165 * three longs. Each long initializer is written in big endian. */
1167 "\t.long\t0x%02x%02x%02x%02x\n"
1168 "\t.long\t0x%02x%02x%02x%02x\n"
1169 "\t.long\t0x%02x%02x%02x%02x\n",
1170 get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2),
1171 get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0),
1172 get_tarval_sub_bits(tv, 7), get_tarval_sub_bits(tv, 6),
1173 get_tarval_sub_bits(tv, 5), get_tarval_sub_bits(tv, 4),
1174 get_tarval_sub_bits(tv, 11), get_tarval_sub_bits(tv, 10),
1175 get_tarval_sub_bits(tv, 9), get_tarval_sub_bits(tv, 8)
1177 be_emit_write_line();
1178 } else if (size == 16) {
1179 if (be_get_backend_param()->byte_order_big_endian) {
1181 "\t.long\t0x%02x%02x%02x%02x\n"
1182 "\t.long\t0x%02x%02x%02x%02x\n"
1183 "\t.long\t0x%02x%02x%02x%02x\n"
1184 "\t.long\t0x%02x%02x%02x%02x\n",
1185 get_tarval_sub_bits(tv, 15), get_tarval_sub_bits(tv, 14),
1186 get_tarval_sub_bits(tv, 13), get_tarval_sub_bits(tv, 12),
1187 get_tarval_sub_bits(tv, 11), get_tarval_sub_bits(tv, 10),
1188 get_tarval_sub_bits(tv, 9), get_tarval_sub_bits(tv, 8),
1189 get_tarval_sub_bits(tv, 7), get_tarval_sub_bits(tv, 6),
1190 get_tarval_sub_bits(tv, 5), get_tarval_sub_bits(tv, 4),
1191 get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2),
1192 get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0)
1195 /* Beware: Mixed endian output! One little endian number emitted as
1196 * three longs. Each long initializer is written in big endian. */
1198 "\t.long\t0x%02x%02x%02x%02x\n"
1199 "\t.long\t0x%02x%02x%02x%02x\n"
1200 "\t.long\t0x%02x%02x%02x%02x\n"
1201 "\t.long\t0x%02x%02x%02x%02x\n",
1202 get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2),
1203 get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0),
1204 get_tarval_sub_bits(tv, 7), get_tarval_sub_bits(tv, 6),
1205 get_tarval_sub_bits(tv, 5), get_tarval_sub_bits(tv, 4),
1206 get_tarval_sub_bits(tv, 11), get_tarval_sub_bits(tv, 10),
1207 get_tarval_sub_bits(tv, 9), get_tarval_sub_bits(tv, 8),
1208 get_tarval_sub_bits(tv, 15), get_tarval_sub_bits(tv, 14),
1209 get_tarval_sub_bits(tv, 13), get_tarval_sub_bits(tv, 12)
1212 be_emit_write_line();
1216 emit_size_type(size);
1217 emit_arith_tarval(tv, size);
1219 be_emit_write_line();
1224 * Emit an atomic value.
1226 * @param env the gas output environment
1227 * @param init a node representing the atomic value (on the const code irg)
1229 static void emit_node_data(be_gas_decl_env_t *env, ir_node *init, ir_type *type)
1231 size_t size = get_type_size_bytes(type);
1232 if (size == 12 || size == 16) {
1234 if (!is_Const(init)) {
1235 panic("12/16byte initializers only support Const nodes yet");
1237 tv = get_Const_tarval(init);
1238 emit_tarval_data(type, tv);
1242 emit_size_type(size);
1243 emit_init_expression(env, init);
1245 be_emit_write_line();
1248 static void emit_initializer(be_gas_decl_env_t *env, const ir_entity *entity)
1250 const ir_initializer_t *initializer = entity->initializer;
1252 normal_or_bitfield *vals;
1256 if (initializer_is_string_const(initializer)) {
1257 emit_string_initializer(initializer);
1261 type = get_entity_type(entity);
1262 size = get_initializer_size(initializer, type);
1268 * In the worst case, every initializer allocates one byte.
1269 * Moreover, initializer might be big, do not allocate on stack.
1271 vals = XMALLOCNZ(normal_or_bitfield, size);
1278 emit_ir_initializer(vals, initializer, type);
1280 /* now write values sorted */
1281 for (k = 0; k < size; ) {
1283 normal_or_bitfield_kind kind = vals[k].kind;
1287 if (vals[k].v.value != NULL) {
1288 emit_node_data(env, vals[k].v.value, vals[k].type);
1289 elem_size = get_type_size_bytes(vals[k].type);
1295 emit_tarval_data(vals[k].type, vals[k].v.tarval);
1296 elem_size = get_type_size_bytes(vals[k].type);
1299 elem_size = emit_string_initializer(vals[k].v.string);
1302 be_emit_irprintf("\t.byte\t%d\n", vals[k].v.bf_val);
1303 be_emit_write_line();
1307 panic("internal compiler error (invalid normal_or_bitfield_kind");
1311 while (k < size && vals[k].kind == NORMAL && vals[k].v.value == NULL) {
1318 be_emit_irprintf("\t.space\t%d, 0\n", space);
1319 be_emit_write_line();
1325 static void emit_compound_graph_init(be_gas_decl_env_t *env,
1326 const ir_entity *ent)
1328 normal_or_bitfield *vals;
1330 unsigned k, last_ofs;
1332 if (entity_is_string_const(ent)) {
1333 emit_string_cst(ent);
1337 n = get_compound_ent_n_values(ent);
1339 /* Find the initializer size. Sorrily gcc support a nasty feature:
1340 The last field of a compound may be a flexible array. This allows
1341 initializers bigger than the type size. */
1342 last_ofs = get_type_size_bytes(get_entity_type(ent));
1343 for (i = 0; i < n; ++i) {
1344 unsigned offset = get_compound_ent_value_offset_bytes(ent, i);
1345 unsigned bits_remainder = get_compound_ent_value_offset_bit_remainder(ent, i);
1346 ir_node *value = get_compound_ent_value(ent, i);
1347 unsigned value_len = get_mode_size_bits(get_irn_mode(value));
1349 offset += (value_len + bits_remainder + 7) >> 3;
1351 if (offset > last_ofs) {
1357 * In the worst case, every initializer allocates one byte.
1358 * Moreover, initializer might be big, do not allocate on stack.
1360 vals = XMALLOCNZ(normal_or_bitfield, last_ofs);
1362 /* collect the values and store them at the offsets */
1363 for (i = 0; i < n; ++i) {
1364 unsigned offset = get_compound_ent_value_offset_bytes(ent, i);
1365 int offset_bits = get_compound_ent_value_offset_bit_remainder(ent, i);
1366 ir_node *value = get_compound_ent_value(ent, i);
1367 int value_len = get_mode_size_bits(get_irn_mode(value));
1369 assert(offset_bits >= 0);
1371 if (offset_bits != 0 ||
1372 (value_len != 8 && value_len != 16 && value_len != 32 && value_len != 64)) {
1373 ir_tarval *tv = get_atomic_init_tv(value);
1374 unsigned char curr_bits, last_bits = 0;
1376 panic("Couldn't get numeric value for bitfield initializer '%s'",
1377 get_entity_ld_name(ent));
1379 /* normalize offset */
1380 offset += offset_bits >> 3;
1383 for (j = 0; value_len + offset_bits > 0; ++j) {
1384 assert(offset + j < last_ofs);
1385 assert(vals[offset + j].kind == BITFIELD || vals[offset + j].v.value == NULL);
1386 vals[offset + j].kind = BITFIELD;
1387 curr_bits = get_tarval_sub_bits(tv, j);
1388 vals[offset + j].v.bf_val |= (last_bits >> (8 - offset_bits)) | (curr_bits << offset_bits);
1390 last_bits = curr_bits;
1395 assert(offset < last_ofs);
1396 assert(vals[offset].kind == NORMAL);
1397 for (i = 1; i < value_len / 8; ++i) {
1398 assert(vals[offset + i].v.value == NULL);
1400 vals[offset].v.value = value;
1404 /* now write them sorted */
1405 for (k = 0; k < last_ofs; ) {
1406 int space = 0, skip = 0;
1407 if (vals[k].kind == NORMAL) {
1408 if (vals[k].v.value != NULL) {
1409 emit_node_data(env, vals[k].v.value, vals[k].type);
1410 skip = get_mode_size_bytes(get_irn_mode(vals[k].v.value)) - 1;
1415 assert(vals[k].kind == BITFIELD);
1416 be_emit_irprintf("\t.byte\t%d\n", vals[k].v.bf_val);
1420 while (k < last_ofs && vals[k].kind == NORMAL && vals[k].v.value == NULL) {
1429 be_emit_irprintf("\t.space\t%d, 0\n", space);
1430 be_emit_write_line();
1436 static void emit_align(unsigned p2alignment)
1438 be_emit_irprintf("\t.p2align\t%u\n", log2_floor(p2alignment));
1439 be_emit_write_line();
1442 static unsigned get_effective_entity_alignment(const ir_entity *entity)
1444 unsigned alignment = get_entity_alignment(entity);
1445 if (alignment == 0) {
1446 ir_type *type = get_entity_type(entity);
1447 alignment = get_type_alignment_bytes(type);
1452 static void emit_common(const ir_entity *entity)
1454 unsigned size = get_type_size_bytes(get_entity_type(entity));
1455 unsigned alignment = get_effective_entity_alignment(entity);
1457 if (get_entity_linkage(entity) & IR_LINKAGE_WEAK) {
1461 switch (be_gas_object_file_format) {
1462 case OBJECT_FILE_FORMAT_MACH_O:
1463 be_emit_cstring("\t.comm ");
1464 be_gas_emit_entity(entity);
1465 be_emit_irprintf(",%u,%u\n", size, log2_floor(alignment));
1466 be_emit_write_line();
1468 case OBJECT_FILE_FORMAT_ELF:
1469 be_emit_cstring("\t.comm ");
1470 be_gas_emit_entity(entity);
1471 be_emit_irprintf(",%u,%u\n", size, alignment);
1472 be_emit_write_line();
1474 case OBJECT_FILE_FORMAT_COFF:
1475 be_emit_cstring("\t.comm ");
1476 be_gas_emit_entity(entity);
1477 be_emit_irprintf(",%u # %u\n", size, alignment);
1478 be_emit_write_line();
1481 panic("invalid object file format");
1484 static void emit_local_common(const ir_entity *entity)
1486 unsigned size = get_type_size_bytes(get_entity_type(entity));
1487 unsigned alignment = get_effective_entity_alignment(entity);
1489 if (get_entity_linkage(entity) & IR_LINKAGE_WEAK) {
1493 switch (be_gas_object_file_format) {
1494 case OBJECT_FILE_FORMAT_MACH_O:
1495 be_emit_cstring("\t.lcomm ");
1496 be_gas_emit_entity(entity);
1497 be_emit_irprintf(",%u,%u\n", size, log2_floor(alignment));
1498 be_emit_write_line();
1500 case OBJECT_FILE_FORMAT_ELF:
1501 be_emit_cstring("\t.local ");
1502 be_gas_emit_entity(entity);
1503 be_emit_cstring("\n");
1504 be_emit_write_line();
1505 be_emit_cstring("\t.comm ");
1506 be_gas_emit_entity(entity);
1507 be_emit_irprintf(",%u,%u\n", size, alignment);
1508 be_emit_write_line();
1510 case OBJECT_FILE_FORMAT_COFF:
1511 be_emit_cstring("\t.lcomm ");
1512 be_gas_emit_entity(entity);
1513 be_emit_irprintf(",%u # %u\n", size, alignment);
1514 be_emit_write_line();
1517 panic("invalid object file format");
1520 static void emit_indirect_symbol(const ir_entity *entity, be_gas_section_t section)
1522 /* we can only do PIC code on macho so far */
1523 assert(be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O);
1525 be_gas_emit_entity(entity);
1526 be_emit_cstring(":\n");
1527 be_emit_write_line();
1528 be_emit_cstring("\t.indirect_symbol ");
1529 be_emit_ident(get_entity_ident(entity));
1531 be_emit_write_line();
1532 if (section == GAS_SECTION_PIC_TRAMPOLINES) {
1533 be_emit_cstring("\thlt ; hlt ; hlt ; hlt ; hlt\n");
1534 be_emit_write_line();
1536 assert(section == GAS_SECTION_PIC_SYMBOLS);
1537 be_emit_cstring("\t.long 0\n");
1538 be_emit_write_line();
1542 char const *be_gas_get_private_prefix(void)
1544 return be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O ? "L" : ".L";
1547 void be_gas_emit_entity(const ir_entity *entity)
1549 if (entity->type == get_code_type()) {
1550 ir_label_t label = get_entity_label(entity);
1551 be_emit_irprintf("%s_%lu", be_gas_get_private_prefix(), label);
1555 if (get_entity_visibility(entity) == ir_visibility_private) {
1556 be_emit_string(be_gas_get_private_prefix());
1558 be_emit_ident(get_entity_ld_ident(entity));
1561 void be_gas_emit_block_name(const ir_node *block)
1563 ir_entity *entity = get_Block_entity(block);
1564 if (entity != NULL) {
1565 be_gas_emit_entity(entity);
1567 be_emit_irprintf("%s%ld", be_gas_get_private_prefix(), get_irn_node_nr(block));
1572 * Dump a global entity.
1574 * @param env the gas output environment
1575 * @param ent the entity to be dumped
1577 static void emit_global(be_gas_decl_env_t *env, const ir_entity *entity)
1579 ir_type *type = get_entity_type(entity);
1580 ident *ld_ident = get_entity_ld_ident(entity);
1581 unsigned alignment = get_effective_entity_alignment(entity);
1582 be_gas_section_t section = determine_section(env, entity);
1583 ir_visibility visibility = get_entity_visibility(entity);
1584 ir_linkage linkage = get_entity_linkage(entity);
1586 /* Block labels are already emitted in the code. */
1587 if (type == get_code_type())
1590 /* we already emitted all methods with graphs in other functions like
1591 * be_gas_emit_function_prolog(). All others don't need to be emitted.
1593 if (is_Method_type(type) && section != GAS_SECTION_PIC_TRAMPOLINES) {
1597 be_dwarf_variable(entity);
1599 if (section == GAS_SECTION_BSS) {
1600 switch (visibility) {
1601 case ir_visibility_local:
1602 case ir_visibility_private:
1603 emit_local_common(entity);
1605 case ir_visibility_external:
1606 if (linkage & IR_LINKAGE_MERGE) {
1607 emit_common(entity);
1614 emit_visibility(entity);
1616 if (!is_po2(alignment))
1617 panic("alignment not a power of 2");
1619 emit_section(section, entity);
1621 if (section == GAS_SECTION_PIC_TRAMPOLINES
1622 || section == GAS_SECTION_PIC_SYMBOLS) {
1623 emit_indirect_symbol(entity, section);
1627 /* nothing left to do without an initializer */
1628 if (!entity_has_definition(entity))
1632 if (alignment > 1) {
1633 emit_align(alignment);
1635 if (be_gas_object_file_format == OBJECT_FILE_FORMAT_ELF
1636 && be_gas_emit_types
1637 && visibility != ir_visibility_private) {
1638 be_emit_cstring("\t.type\t");
1639 be_gas_emit_entity(entity);
1640 be_emit_cstring(", ");
1641 be_emit_char(be_gas_elf_type_char);
1642 be_emit_cstring("object\n\t.size\t");\
1643 be_gas_emit_entity(entity);
1644 be_emit_irprintf(", %u\n", get_type_size_bytes(type));
1647 if (get_id_str(ld_ident)[0] != '\0') {
1648 be_gas_emit_entity(entity);
1649 be_emit_cstring(":\n");
1650 be_emit_write_line();
1653 if (entity_is_null(entity)) {
1654 /* we should use .space for stuff in the bss segment */
1655 unsigned size = get_type_size_bytes(type);
1657 be_emit_irprintf("\t.space %u, 0\n", get_type_size_bytes(type));
1658 be_emit_write_line();
1660 } else if (entity_has_compound_ent_values(entity)) {
1661 emit_compound_graph_init(env, entity);
1663 assert(entity->initializer != NULL);
1664 emit_initializer(env, entity);
1669 * Dumps declarations of global variables and the initialization code.
1671 * @param gt a global like type, either the global or the TLS one
1672 * @param env an environment
1674 static void be_gas_emit_globals(ir_type *gt, be_gas_decl_env_t *env)
1676 size_t i, n = get_compound_n_members(gt);
1678 for (i = 0; i < n; i++) {
1679 ir_entity *ent = get_compound_member(gt, i);
1680 emit_global(env, ent);
1684 /* Generate all entities. */
1685 static void emit_global_decls(const be_main_env_t *main_env)
1687 be_gas_decl_env_t env;
1688 memset(&env, 0, sizeof(env));
1690 /* dump global type */
1691 env.main_env = main_env;
1692 env.section = (be_gas_section_t) -1;
1694 be_gas_emit_globals(get_glob_type(), &env);
1695 be_gas_emit_globals(get_tls_type(), &env);
1696 be_gas_emit_globals(get_segment_type(IR_SEGMENT_CONSTRUCTORS), &env);
1697 be_gas_emit_globals(get_segment_type(IR_SEGMENT_DESTRUCTORS), &env);
1698 be_gas_emit_globals(main_env->pic_symbols_type, &env);
1699 be_gas_emit_globals(main_env->pic_trampolines_type, &env);
1702 * ".subsections_via_symbols marks object files which are OK to divide
1703 * their section contents into individual blocks".
1704 * From my understanding this means no label points in the middle of an
1705 * object which we want to address as a whole. Firm code should be fine
1708 if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) {
1709 be_emit_cstring("\t.subsections_via_symbols\n");
1710 be_emit_write_line();
1714 void be_emit_jump_table(const ir_node *node, const ir_switch_table *table,
1715 ir_entity *entity, get_cfop_target_func get_cfop_target)
1717 unsigned n_outs = arch_get_irn_n_outs(node);
1718 const ir_node **targets = XMALLOCNZ(const ir_node*, n_outs);
1719 size_t n_entries = ir_switch_table_get_n_entries(table);
1720 unsigned long length = 0;
1722 const ir_edge_t *edge;
1724 const ir_node **labels;
1726 /* go over all proj's and collect their jump targets */
1727 foreach_out_edge(node, edge) {
1728 ir_node *proj = get_edge_src_irn(edge);
1729 long pn = get_Proj_proj(proj);
1730 ir_node *target = get_cfop_target(proj);
1731 assert(targets[pn] == NULL);
1732 targets[pn] = target;
1735 /* go over table to determine max value (note that we normalized the
1736 * ranges so that the minimum is 0) */
1737 for (e = 0; e < n_entries; ++e) {
1738 const ir_switch_table_entry *entry
1739 = ir_switch_table_get_entry_const(table, e);
1740 ir_tarval *max = entry->max;
1744 if (!tarval_is_long(max))
1745 panic("switch case overflow (%+F)", node);
1746 val = (unsigned long) get_tarval_long(max);
1752 /* the 16000 isn't a real limit of the architecture. But should protect us
1753 * from seamingly endless compiler runs */
1754 if (length > 16000) {
1755 /* switch lowerer should have broken this monster to pieces... */
1756 panic("too large switch encountered (%+F)", node);
1760 labels = XMALLOCNZ(const ir_node*, length);
1761 for (e = 0; e < n_entries; ++e) {
1762 const ir_switch_table_entry *entry
1763 = ir_switch_table_get_entry_const(table, e);
1764 ir_tarval *min = entry->min;
1765 ir_tarval *max = entry->max;
1766 const ir_node *target = targets[entry->pn];
1767 assert(entry->pn < (long)n_outs);
1769 unsigned long val = (unsigned long)get_tarval_long(max);
1770 labels[val] = target;
1772 unsigned long min_val;
1773 unsigned long max_val;
1775 if (!tarval_is_long(min))
1776 panic("switch case overflow (%+F)", node);
1777 min_val = (unsigned long)get_tarval_long(min);
1778 max_val = (unsigned long)get_tarval_long(max);
1779 assert(min_val <= max_val);
1780 for (i = min_val; i <= max_val; ++i) {
1787 if (entity != NULL) {
1788 be_gas_emit_switch_section(GAS_SECTION_RODATA);
1789 be_emit_cstring("\t.align 4\n");
1790 be_gas_emit_entity(entity);
1791 be_emit_cstring(":\n");
1794 for (i = 0; i < length; ++i) {
1795 const ir_node *block = labels[i];
1798 be_emit_cstring("\t.long ");
1799 be_gas_emit_block_name(block);
1801 be_emit_write_line();
1805 be_gas_emit_switch_section(GAS_SECTION_TEXT);
1811 static void emit_global_asms(void)
1813 size_t n = get_irp_n_asms();
1816 be_gas_emit_switch_section(GAS_SECTION_TEXT);
1817 for (i = 0; i < n; ++i) {
1818 ident *asmtext = get_irp_asm(i);
1820 be_emit_cstring("#APP\n");
1821 be_emit_write_line();
1822 be_emit_ident(asmtext);
1824 be_emit_write_line();
1825 be_emit_cstring("#NO_APP\n");
1826 be_emit_write_line();
1830 void be_gas_begin_compilation_unit(const be_main_env_t *env)
1833 be_dwarf_unit_begin(env->cup_name);
1838 void be_gas_end_compilation_unit(const be_main_env_t *env)
1840 emit_global_decls(env);
1842 be_dwarf_unit_end();