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 if (be_options.verbose_asm) {
540 be_emit_cstring("# -- Begin ");
541 be_gas_emit_entity(entity);
543 be_emit_write_line();
546 if (po2alignment > 0) {
547 const char *fill_byte = "";
548 unsigned maximum_skip = (1 << po2alignment) - 1;
549 /* gcc fills space between function with 0x90... */
550 if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) {
553 be_emit_cstring("\t.p2align ");
554 be_emit_irprintf("%u,%s,%u\n", po2alignment, fill_byte, maximum_skip);
555 be_emit_write_line();
557 emit_visibility(entity);
559 switch (be_gas_object_file_format) {
560 case OBJECT_FILE_FORMAT_ELF:
561 be_emit_cstring("\t.type\t");
562 be_gas_emit_entity(entity);
563 be_emit_cstring(", ");
564 be_emit_char(be_gas_elf_type_char);
565 be_emit_cstring("function\n");
566 be_emit_write_line();
568 case OBJECT_FILE_FORMAT_COFF:
569 be_emit_cstring("\t.def\t");
570 be_gas_emit_entity(entity);
571 be_emit_cstring(";");
572 if (get_entity_visibility(entity) == ir_visibility_local) {
573 be_emit_cstring("\t.scl\t3;");
575 be_emit_cstring("\t.scl\t2;");
577 be_emit_cstring("\t.type\t32;\t.endef\n");
578 be_emit_write_line();
580 case OBJECT_FILE_FORMAT_MACH_O:
583 be_gas_emit_entity(entity);
584 be_emit_cstring(":\n");
585 be_emit_write_line();
587 be_dwarf_method_begin();
590 void be_gas_emit_function_epilog(const ir_entity *entity)
592 be_dwarf_method_end();
594 if (be_gas_object_file_format == OBJECT_FILE_FORMAT_ELF) {
595 be_emit_cstring("\t.size\t");
596 be_gas_emit_entity(entity);
597 be_emit_cstring(", .-");
598 be_gas_emit_entity(entity);
600 be_emit_write_line();
603 if (be_options.verbose_asm) {
604 be_emit_cstring("# -- End ");
605 be_gas_emit_entity(entity);
607 be_emit_write_line();
611 be_emit_write_line();
617 * @param tv the tarval
618 * @param bytes the width of the tarvals value in bytes
620 static void emit_arith_tarval(ir_tarval *tv, unsigned bytes)
624 be_emit_irprintf("0x%02x", get_tarval_sub_bits(tv, 0));
628 be_emit_irprintf("0x%02x%02x",
629 get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
633 be_emit_irprintf("0x%02x%02x%02x%02x",
634 get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2),
635 get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
639 be_emit_irprintf("0x%02x%02x%02x%02x%02x%02x%02x%02x",
640 get_tarval_sub_bits(tv, 7), get_tarval_sub_bits(tv, 6),
641 get_tarval_sub_bits(tv, 5), get_tarval_sub_bits(tv, 4),
642 get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2),
643 get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
647 panic("Can't dump a tarval with %d bytes", bytes);
651 * Return the label prefix for labeled instructions.
653 const char *be_gas_insn_label_prefix(void)
659 * Return the tarval of an atomic initializer.
661 * @param init a node representing the initializer (on the const code irg)
665 static ir_tarval *get_atomic_init_tv(ir_node *init)
668 ir_mode *mode = get_irn_mode(init);
670 switch (get_irn_opcode(init)) {
673 init = get_Cast_op(init);
677 init = get_Conv_op(init);
681 return get_Const_tarval(init);
684 switch (get_SymConst_kind(init)) {
685 case symconst_type_size:
686 return new_tarval_from_long(get_type_size_bytes(get_SymConst_type(init)), mode);
688 case symconst_type_align:
689 return new_tarval_from_long(get_type_alignment_bytes(get_SymConst_type(init)), mode);
691 case symconst_ofs_ent:
692 return new_tarval_from_long(get_entity_offset(get_SymConst_entity(init)), mode);
694 case symconst_enum_const:
695 return get_enumeration_value(get_SymConst_enum(init));
708 * Dump an atomic value.
710 * @param env the gas output environment
711 * @param init a node representing the atomic value (on the const code irg)
713 static void emit_init_expression(be_gas_decl_env_t *env, ir_node *init)
715 ir_mode *mode = get_irn_mode(init);
716 int bytes = get_mode_size_bytes(mode);
720 init = skip_Id(init);
722 switch (get_irn_opcode(init)) {
724 emit_init_expression(env, get_Cast_op(init));
728 emit_init_expression(env, get_Conv_op(init));
732 tv = get_Const_tarval(init);
734 /* it's an arithmetic value */
735 emit_arith_tarval(tv, bytes);
739 switch (get_SymConst_kind(init)) {
740 case symconst_addr_ent:
741 ent = get_SymConst_entity(init);
742 be_gas_emit_entity(ent);
745 case symconst_ofs_ent:
746 ent = get_SymConst_entity(init);
747 be_emit_irprintf("%d", get_entity_offset(ent));
750 case symconst_type_size:
751 be_emit_irprintf("%u", get_type_size_bytes(get_SymConst_type(init)));
754 case symconst_type_align:
755 be_emit_irprintf("%u", get_type_alignment_bytes(get_SymConst_type(init)));
758 case symconst_enum_const:
759 tv = get_enumeration_value(get_SymConst_enum(init));
760 emit_arith_tarval(tv, bytes);
764 assert(!"emit_atomic_init(): don't know how to init from this SymConst");
769 if (!mode_is_int(mode) && !mode_is_reference(mode)) {
770 panic("Constant must be int or pointer for '+' to work");
772 emit_init_expression(env, get_Add_left(init));
773 be_emit_cstring(" + ");
774 emit_init_expression(env, get_Add_right(init));
778 if (!mode_is_int(mode) && !mode_is_reference(mode)) {
779 panic("Constant must be int or pointer for '-' to work");
781 emit_init_expression(env, get_Sub_left(init));
782 be_emit_cstring(" - ");
783 emit_init_expression(env, get_Sub_right(init));
787 if (!mode_is_int(mode) && !mode_is_reference(mode)) {
788 panic("Constant must be int or pointer for '*' to work");
790 emit_init_expression(env, get_Mul_left(init));
791 be_emit_cstring(" * ");
792 emit_init_expression(env, get_Mul_right(init));
796 be_emit_cstring("0");
800 panic("emit_atomic_init(): unsupported IR-node %+F", init);
805 * Dumps the type for given size (.byte, .long, ...)
807 * @param size the size in bytes
809 static void emit_size_type(size_t size)
812 case 1: be_emit_cstring("\t.byte\t"); break;
813 case 2: be_emit_cstring("\t.short\t"); break;
814 case 4: be_emit_cstring("\t.long\t"); break;
815 case 8: be_emit_cstring("\t.quad\t"); break;
818 panic("Try to dump a type with %u bytes", (unsigned)size);
823 * Dump a string constant.
824 * No checks are made!!
826 * @param ent The entity to dump.
828 static void emit_string_cst(const ir_entity *ent)
836 len = get_compound_ent_n_values(ent);
838 if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) {
839 be_emit_cstring("\t.ascii \"");
841 be_emit_cstring("\t.string \"");
845 for (i = 0; i < output_len; ++i) {
849 irn = get_compound_ent_value(ent, i);
850 c = (int) get_tarval_long(get_Const_tarval(irn));
853 case '"' : be_emit_cstring("\\\""); break;
854 case '\n': be_emit_cstring("\\n"); break;
855 case '\r': be_emit_cstring("\\r"); break;
856 case '\t': be_emit_cstring("\\t"); break;
857 case '\\': be_emit_cstring("\\\\"); break;
862 be_emit_irprintf("\\%03o", c);
866 be_emit_cstring("\"\n");
867 be_emit_write_line();
869 type = get_entity_type(ent);
870 type_size = get_type_size_bytes(type);
871 remaining_space = type_size - len;
872 assert(remaining_space >= 0);
873 if (remaining_space > 0) {
874 be_emit_irprintf("\t.space\t%d, 0\n", remaining_space);
878 static size_t emit_string_initializer(const ir_initializer_t *initializer)
882 len = initializer->compound.n_initializers;
883 if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) {
884 be_emit_cstring("\t.ascii \"");
886 be_emit_cstring("\t.string \"");
890 for (i = 0; i < len; ++i) {
891 const ir_initializer_t *sub_initializer
892 = get_initializer_compound_value(initializer, i);
894 ir_tarval *tv = get_initializer_tarval(sub_initializer);
895 int c = get_tarval_long(tv);
898 case '"' : be_emit_cstring("\\\""); break;
899 case '\n': be_emit_cstring("\\n"); break;
900 case '\r': be_emit_cstring("\\r"); break;
901 case '\t': be_emit_cstring("\\t"); break;
902 case '\\': be_emit_cstring("\\\\"); break;
907 be_emit_irprintf("\\%03o", c);
911 be_emit_cstring("\"\n");
912 be_emit_write_line();
914 return initializer->compound.n_initializers;
917 typedef enum normal_or_bitfield_kind {
922 } normal_or_bitfield_kind;
925 normal_or_bitfield_kind kind;
930 unsigned char bf_val;
931 const ir_initializer_t *string;
933 } normal_or_bitfield;
935 static size_t get_initializer_size(const ir_initializer_t *initializer,
938 switch (get_initializer_kind(initializer)) {
939 case IR_INITIALIZER_TARVAL:
940 assert(get_tarval_mode(get_initializer_tarval_value(initializer)) == get_type_mode(type));
941 return get_type_size_bytes(type);
942 case IR_INITIALIZER_CONST:
943 case IR_INITIALIZER_NULL:
944 return get_type_size_bytes(type);
945 case IR_INITIALIZER_COMPOUND:
946 if (is_Array_type(type)) {
947 if (is_array_variable_size(type)) {
948 ir_type *element_type = get_array_element_type(type);
949 unsigned element_size = get_type_size_bytes(element_type);
950 unsigned element_align
951 = get_type_alignment_bytes(element_type);
952 unsigned misalign = element_size % element_align;
954 = get_initializer_compound_n_entries(initializer);
955 element_size += element_align - misalign;
956 return n_inits * element_size;
958 return get_type_size_bytes(type);
961 assert(is_compound_type(type));
962 size_t size = get_type_size_bytes(type);
963 if (is_compound_variable_size(type)) {
964 /* last initializer has to be an array of variable size */
965 size_t l = get_initializer_compound_n_entries(initializer)-1;
966 const ir_initializer_t *last
967 = get_initializer_compound_value(initializer, l);
968 const ir_entity *last_ent = get_compound_member(type, l);
969 ir_type *last_type = get_entity_type(last_ent);
970 assert(is_array_variable_size(last_type));
971 size += get_initializer_size(last, last_type);
977 panic("found invalid initializer");
981 static normal_or_bitfield *glob_vals;
982 static size_t max_vals;
985 static void emit_bitfield(normal_or_bitfield *vals, size_t offset_bits,
986 const ir_initializer_t *initializer, ir_type *type)
988 static const size_t BITS_PER_BYTE = 8;
989 ir_mode *mode = get_type_mode(type);
990 ir_tarval *tv = NULL;
994 bool big_endian = be_get_backend_param()->byte_order_big_endian;
996 switch (get_initializer_kind(initializer)) {
997 case IR_INITIALIZER_NULL:
999 case IR_INITIALIZER_TARVAL:
1000 tv = get_initializer_tarval_value(initializer);
1002 case IR_INITIALIZER_CONST: {
1003 ir_node *node = get_initializer_const_value(initializer);
1004 if (!is_Const(node)) {
1005 panic("bitfield initializer not a Const node");
1007 tv = get_Const_tarval(node);
1010 case IR_INITIALIZER_COMPOUND:
1011 panic("bitfield initializer is compound");
1014 panic("Couldn't get numeric value for bitfield initializer");
1016 tv = tarval_convert_to(tv, get_type_mode(type));
1018 value_len = get_type_size_bytes(get_primitive_base_type(type));
1020 end = get_mode_size_bits(mode);
1021 while (bit_offset < end) {
1022 size_t src_offset = bit_offset / BITS_PER_BYTE;
1023 size_t src_offset_bits = bit_offset % BITS_PER_BYTE;
1024 size_t dst_offset = (bit_offset+offset_bits) / BITS_PER_BYTE;
1025 size_t dst_offset_bits = (bit_offset+offset_bits) % BITS_PER_BYTE;
1026 size_t src_bits_len = end-bit_offset;
1027 size_t dst_bits_len = BITS_PER_BYTE-dst_offset_bits;
1028 unsigned char curr_bits;
1029 normal_or_bitfield *val;
1030 if (src_bits_len > dst_bits_len)
1031 src_bits_len = dst_bits_len;
1034 val = &vals[value_len - dst_offset - 1];
1036 val = &vals[dst_offset];
1039 assert((val-glob_vals) < (ptrdiff_t) max_vals);
1040 assert(val->kind == BITFIELD ||
1041 (val->kind == NORMAL && val->v.value == NULL));
1042 val->kind = BITFIELD;
1043 curr_bits = get_tarval_sub_bits(tv, src_offset);
1044 curr_bits = curr_bits >> src_offset_bits;
1045 if (src_offset_bits + src_bits_len > 8) {
1046 unsigned next_bits = get_tarval_sub_bits(tv, src_offset+1);
1047 curr_bits |= next_bits << (8 - src_offset_bits);
1049 curr_bits &= (1 << src_bits_len) - 1;
1050 val->v.bf_val |= curr_bits << dst_offset_bits;
1052 bit_offset += dst_bits_len;
1056 static void emit_ir_initializer(normal_or_bitfield *vals,
1057 const ir_initializer_t *initializer,
1060 assert((size_t) (vals - glob_vals) < max_vals);
1062 if (initializer_is_string_const(initializer)) {
1063 assert(vals->kind != BITFIELD);
1064 vals->kind = STRING;
1065 vals->v.string = initializer;
1069 switch (get_initializer_kind(initializer)) {
1070 case IR_INITIALIZER_NULL:
1072 case IR_INITIALIZER_TARVAL: {
1075 assert(vals->kind != BITFIELD);
1076 vals->kind = TARVAL;
1078 vals->v.tarval = get_initializer_tarval_value(initializer);
1079 assert(get_type_mode(type) == get_tarval_mode(vals->v.tarval));
1080 for (i = 1; i < get_type_size_bytes(type); ++i) {
1081 vals[i].kind = NORMAL;
1082 vals[i].type = NULL;
1083 vals[i].v.value = NULL;
1087 case IR_INITIALIZER_CONST: {
1090 assert(vals->kind != BITFIELD);
1091 vals->kind = NORMAL;
1093 vals->v.value = get_initializer_const_value(initializer);
1094 for (i = 1; i < get_type_size_bytes(type); ++i) {
1095 vals[i].kind = NORMAL;
1096 vals[i].type = NULL;
1097 vals[i].v.value = NULL;
1101 case IR_INITIALIZER_COMPOUND: {
1103 size_t n = get_initializer_compound_n_entries(initializer);
1105 if (is_Array_type(type)) {
1106 ir_type *element_type = get_array_element_type(type);
1107 size_t skip = get_type_size_bytes(element_type);
1108 size_t alignment = get_type_alignment_bytes(element_type);
1109 size_t misalign = skip % alignment;
1110 if (misalign != 0) {
1111 skip += alignment - misalign;
1114 for (i = 0; i < n; ++i) {
1115 ir_initializer_t *sub_initializer
1116 = get_initializer_compound_value(initializer, i);
1118 emit_ir_initializer(vals, sub_initializer, element_type);
1123 size_t n_members, i;
1124 assert(is_compound_type(type));
1125 n_members = get_compound_n_members(type);
1126 for (i = 0; i < n_members; ++i) {
1127 ir_entity *member = get_compound_member(type, i);
1128 size_t offset = get_entity_offset(member);
1129 ir_type *subtype = get_entity_type(member);
1130 ir_mode *mode = get_type_mode(subtype);
1131 ir_initializer_t *sub_initializer;
1133 assert(i < get_initializer_compound_n_entries(initializer));
1135 = get_initializer_compound_value(initializer, i);
1139 = get_entity_offset_bits_remainder(member);
1141 if (is_Primitive_type(subtype)
1142 && get_primitive_base_type(subtype) != NULL) {
1143 emit_bitfield(&vals[offset], offset_bits,
1144 sub_initializer, subtype);
1147 assert(offset_bits == 0);
1151 emit_ir_initializer(&vals[offset], sub_initializer, subtype);
1158 panic("invalid ir_initializer kind found");
1161 static void emit_tarval_data(ir_type *type, ir_tarval *tv)
1163 size_t size = get_type_size_bytes(type);
1165 /* this should be an x86 extended float */
1166 assert(be_get_backend_param()->byte_order_big_endian == 0);
1168 /* Beware: Mixed endian output! One little endian number emitted as
1169 * three longs. Each long initializer is written in big endian. */
1171 "\t.long\t0x%02x%02x%02x%02x\n"
1172 "\t.long\t0x%02x%02x%02x%02x\n"
1173 "\t.long\t0x%02x%02x%02x%02x\n",
1174 get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2),
1175 get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0),
1176 get_tarval_sub_bits(tv, 7), get_tarval_sub_bits(tv, 6),
1177 get_tarval_sub_bits(tv, 5), get_tarval_sub_bits(tv, 4),
1178 get_tarval_sub_bits(tv, 11), get_tarval_sub_bits(tv, 10),
1179 get_tarval_sub_bits(tv, 9), get_tarval_sub_bits(tv, 8)
1181 be_emit_write_line();
1182 } else if (size == 16) {
1183 if (be_get_backend_param()->byte_order_big_endian) {
1185 "\t.long\t0x%02x%02x%02x%02x\n"
1186 "\t.long\t0x%02x%02x%02x%02x\n"
1187 "\t.long\t0x%02x%02x%02x%02x\n"
1188 "\t.long\t0x%02x%02x%02x%02x\n",
1189 get_tarval_sub_bits(tv, 15), get_tarval_sub_bits(tv, 14),
1190 get_tarval_sub_bits(tv, 13), get_tarval_sub_bits(tv, 12),
1191 get_tarval_sub_bits(tv, 11), get_tarval_sub_bits(tv, 10),
1192 get_tarval_sub_bits(tv, 9), get_tarval_sub_bits(tv, 8),
1193 get_tarval_sub_bits(tv, 7), get_tarval_sub_bits(tv, 6),
1194 get_tarval_sub_bits(tv, 5), get_tarval_sub_bits(tv, 4),
1195 get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2),
1196 get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0)
1199 /* Beware: Mixed endian output! One little endian number emitted as
1200 * three longs. Each long initializer is written in big endian. */
1202 "\t.long\t0x%02x%02x%02x%02x\n"
1203 "\t.long\t0x%02x%02x%02x%02x\n"
1204 "\t.long\t0x%02x%02x%02x%02x\n"
1205 "\t.long\t0x%02x%02x%02x%02x\n",
1206 get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2),
1207 get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0),
1208 get_tarval_sub_bits(tv, 7), get_tarval_sub_bits(tv, 6),
1209 get_tarval_sub_bits(tv, 5), get_tarval_sub_bits(tv, 4),
1210 get_tarval_sub_bits(tv, 11), get_tarval_sub_bits(tv, 10),
1211 get_tarval_sub_bits(tv, 9), get_tarval_sub_bits(tv, 8),
1212 get_tarval_sub_bits(tv, 15), get_tarval_sub_bits(tv, 14),
1213 get_tarval_sub_bits(tv, 13), get_tarval_sub_bits(tv, 12)
1216 be_emit_write_line();
1220 emit_size_type(size);
1221 emit_arith_tarval(tv, size);
1223 be_emit_write_line();
1228 * Emit an atomic value.
1230 * @param env the gas output environment
1231 * @param init a node representing the atomic value (on the const code irg)
1233 static void emit_node_data(be_gas_decl_env_t *env, ir_node *init, ir_type *type)
1235 size_t size = get_type_size_bytes(type);
1236 if (size == 12 || size == 16) {
1238 if (!is_Const(init)) {
1239 panic("12/16byte initializers only support Const nodes yet");
1241 tv = get_Const_tarval(init);
1242 emit_tarval_data(type, tv);
1246 emit_size_type(size);
1247 emit_init_expression(env, init);
1249 be_emit_write_line();
1252 static void emit_initializer(be_gas_decl_env_t *env, const ir_entity *entity)
1254 const ir_initializer_t *initializer = entity->initializer;
1256 normal_or_bitfield *vals;
1260 if (initializer_is_string_const(initializer)) {
1261 emit_string_initializer(initializer);
1265 type = get_entity_type(entity);
1266 size = get_initializer_size(initializer, type);
1272 * In the worst case, every initializer allocates one byte.
1273 * Moreover, initializer might be big, do not allocate on stack.
1275 vals = XMALLOCNZ(normal_or_bitfield, size);
1282 emit_ir_initializer(vals, initializer, type);
1284 /* now write values sorted */
1285 for (k = 0; k < size; ) {
1287 normal_or_bitfield_kind kind = vals[k].kind;
1291 if (vals[k].v.value != NULL) {
1292 emit_node_data(env, vals[k].v.value, vals[k].type);
1293 elem_size = get_type_size_bytes(vals[k].type);
1299 emit_tarval_data(vals[k].type, vals[k].v.tarval);
1300 elem_size = get_type_size_bytes(vals[k].type);
1303 elem_size = emit_string_initializer(vals[k].v.string);
1306 be_emit_irprintf("\t.byte\t%d\n", vals[k].v.bf_val);
1307 be_emit_write_line();
1311 panic("internal compiler error (invalid normal_or_bitfield_kind");
1315 while (k < size && vals[k].kind == NORMAL && vals[k].v.value == NULL) {
1322 be_emit_irprintf("\t.space\t%d, 0\n", space);
1323 be_emit_write_line();
1329 static void emit_compound_graph_init(be_gas_decl_env_t *env,
1330 const ir_entity *ent)
1332 normal_or_bitfield *vals;
1334 unsigned k, last_ofs;
1336 if (entity_is_string_const(ent)) {
1337 emit_string_cst(ent);
1341 n = get_compound_ent_n_values(ent);
1343 /* Find the initializer size. Sorrily gcc support a nasty feature:
1344 The last field of a compound may be a flexible array. This allows
1345 initializers bigger than the type size. */
1346 last_ofs = get_type_size_bytes(get_entity_type(ent));
1347 for (i = 0; i < n; ++i) {
1348 unsigned offset = get_compound_ent_value_offset_bytes(ent, i);
1349 unsigned bits_remainder = get_compound_ent_value_offset_bit_remainder(ent, i);
1350 ir_node *value = get_compound_ent_value(ent, i);
1351 unsigned value_len = get_mode_size_bits(get_irn_mode(value));
1353 offset += (value_len + bits_remainder + 7) >> 3;
1355 if (offset > last_ofs) {
1361 * In the worst case, every initializer allocates one byte.
1362 * Moreover, initializer might be big, do not allocate on stack.
1364 vals = XMALLOCNZ(normal_or_bitfield, last_ofs);
1366 /* collect the values and store them at the offsets */
1367 for (i = 0; i < n; ++i) {
1368 unsigned offset = get_compound_ent_value_offset_bytes(ent, i);
1369 int offset_bits = get_compound_ent_value_offset_bit_remainder(ent, i);
1370 ir_node *value = get_compound_ent_value(ent, i);
1371 int value_len = get_mode_size_bits(get_irn_mode(value));
1373 assert(offset_bits >= 0);
1375 if (offset_bits != 0 ||
1376 (value_len != 8 && value_len != 16 && value_len != 32 && value_len != 64)) {
1377 ir_tarval *tv = get_atomic_init_tv(value);
1378 unsigned char curr_bits, last_bits = 0;
1380 panic("Couldn't get numeric value for bitfield initializer '%s'",
1381 get_entity_ld_name(ent));
1383 /* normalize offset */
1384 offset += offset_bits >> 3;
1387 for (j = 0; value_len + offset_bits > 0; ++j) {
1388 assert(offset + j < last_ofs);
1389 assert(vals[offset + j].kind == BITFIELD || vals[offset + j].v.value == NULL);
1390 vals[offset + j].kind = BITFIELD;
1391 curr_bits = get_tarval_sub_bits(tv, j);
1392 vals[offset + j].v.bf_val |= (last_bits >> (8 - offset_bits)) | (curr_bits << offset_bits);
1394 last_bits = curr_bits;
1399 assert(offset < last_ofs);
1400 assert(vals[offset].kind == NORMAL);
1401 for (i = 1; i < value_len / 8; ++i) {
1402 assert(vals[offset + i].v.value == NULL);
1404 vals[offset].v.value = value;
1408 /* now write them sorted */
1409 for (k = 0; k < last_ofs; ) {
1410 int space = 0, skip = 0;
1411 if (vals[k].kind == NORMAL) {
1412 if (vals[k].v.value != NULL) {
1413 emit_node_data(env, vals[k].v.value, vals[k].type);
1414 skip = get_mode_size_bytes(get_irn_mode(vals[k].v.value)) - 1;
1419 assert(vals[k].kind == BITFIELD);
1420 be_emit_irprintf("\t.byte\t%d\n", vals[k].v.bf_val);
1424 while (k < last_ofs && vals[k].kind == NORMAL && vals[k].v.value == NULL) {
1433 be_emit_irprintf("\t.space\t%d, 0\n", space);
1434 be_emit_write_line();
1440 static void emit_align(unsigned p2alignment)
1442 be_emit_irprintf("\t.p2align\t%u\n", log2_floor(p2alignment));
1443 be_emit_write_line();
1446 static unsigned get_effective_entity_alignment(const ir_entity *entity)
1448 unsigned alignment = get_entity_alignment(entity);
1449 if (alignment == 0) {
1450 ir_type *type = get_entity_type(entity);
1451 alignment = get_type_alignment_bytes(type);
1456 static void emit_common(const ir_entity *entity)
1458 unsigned size = get_type_size_bytes(get_entity_type(entity));
1459 unsigned alignment = get_effective_entity_alignment(entity);
1461 if (get_entity_linkage(entity) & IR_LINKAGE_WEAK) {
1465 switch (be_gas_object_file_format) {
1466 case OBJECT_FILE_FORMAT_MACH_O:
1467 be_emit_cstring("\t.comm ");
1468 be_gas_emit_entity(entity);
1469 be_emit_irprintf(",%u,%u\n", size, log2_floor(alignment));
1470 be_emit_write_line();
1472 case OBJECT_FILE_FORMAT_ELF:
1473 be_emit_cstring("\t.comm ");
1474 be_gas_emit_entity(entity);
1475 be_emit_irprintf(",%u,%u\n", size, alignment);
1476 be_emit_write_line();
1478 case OBJECT_FILE_FORMAT_COFF:
1479 be_emit_cstring("\t.comm ");
1480 be_gas_emit_entity(entity);
1481 be_emit_irprintf(",%u # %u\n", size, alignment);
1482 be_emit_write_line();
1485 panic("invalid object file format");
1488 static void emit_local_common(const ir_entity *entity)
1490 unsigned size = get_type_size_bytes(get_entity_type(entity));
1491 unsigned alignment = get_effective_entity_alignment(entity);
1493 if (get_entity_linkage(entity) & IR_LINKAGE_WEAK) {
1497 switch (be_gas_object_file_format) {
1498 case OBJECT_FILE_FORMAT_MACH_O:
1499 be_emit_cstring("\t.lcomm ");
1500 be_gas_emit_entity(entity);
1501 be_emit_irprintf(",%u,%u\n", size, log2_floor(alignment));
1502 be_emit_write_line();
1504 case OBJECT_FILE_FORMAT_ELF:
1505 be_emit_cstring("\t.local ");
1506 be_gas_emit_entity(entity);
1507 be_emit_cstring("\n");
1508 be_emit_write_line();
1509 be_emit_cstring("\t.comm ");
1510 be_gas_emit_entity(entity);
1511 be_emit_irprintf(",%u,%u\n", size, alignment);
1512 be_emit_write_line();
1514 case OBJECT_FILE_FORMAT_COFF:
1515 be_emit_cstring("\t.lcomm ");
1516 be_gas_emit_entity(entity);
1517 be_emit_irprintf(",%u # %u\n", size, alignment);
1518 be_emit_write_line();
1521 panic("invalid object file format");
1524 static void emit_indirect_symbol(const ir_entity *entity, be_gas_section_t section)
1526 /* we can only do PIC code on macho so far */
1527 assert(be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O);
1529 be_gas_emit_entity(entity);
1530 be_emit_cstring(":\n");
1531 be_emit_write_line();
1532 be_emit_irprintf("\t.indirect_symbol %I\n", get_entity_ident(entity));
1533 be_emit_write_line();
1534 if (section == GAS_SECTION_PIC_TRAMPOLINES) {
1535 be_emit_cstring("\thlt ; hlt ; hlt ; hlt ; hlt\n");
1536 be_emit_write_line();
1538 assert(section == GAS_SECTION_PIC_SYMBOLS);
1539 be_emit_cstring("\t.long 0\n");
1540 be_emit_write_line();
1544 char const *be_gas_get_private_prefix(void)
1546 return be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O ? "L" : ".L";
1549 void be_gas_emit_entity(const ir_entity *entity)
1551 if (entity->type == get_code_type()) {
1552 ir_label_t label = get_entity_label(entity);
1553 be_emit_irprintf("%s_%lu", be_gas_get_private_prefix(), label);
1557 if (get_entity_visibility(entity) == ir_visibility_private) {
1558 be_emit_string(be_gas_get_private_prefix());
1560 be_emit_irprintf("%I", get_entity_ld_ident(entity));
1563 void be_gas_emit_block_name(const ir_node *block)
1565 ir_entity *entity = get_Block_entity(block);
1566 if (entity != NULL) {
1567 be_gas_emit_entity(entity);
1569 be_emit_irprintf("%s%ld", be_gas_get_private_prefix(), get_irn_node_nr(block));
1573 void be_gas_begin_block(const ir_node *block, bool needs_label)
1576 be_gas_emit_block_name(block);
1579 if (!be_options.verbose_asm)
1581 be_emit_cstring("/*");
1582 be_gas_emit_block_name(block);
1583 be_emit_cstring(":*/");
1586 if (be_options.verbose_asm) {
1588 ir_graph *irg = get_irn_irg(block);
1589 ir_exec_freq *exec_freq = be_get_irg_exec_freq(irg);
1591 be_emit_pad_comment();
1592 be_emit_cstring("/* preds:");
1594 arity = get_irn_arity(block);
1596 be_emit_cstring(" none");
1599 for (i = 0; i < arity; ++i) {
1600 ir_node *predblock = get_Block_cfgpred_block(block, i);
1602 be_gas_emit_block_name(predblock);
1605 if (exec_freq != NULL) {
1606 be_emit_irprintf(", freq: %.3f",
1607 get_block_execfreq(exec_freq, block));
1609 be_emit_cstring(" */");
1612 be_emit_write_line();
1616 * Dump a global entity.
1618 * @param env the gas output environment
1619 * @param ent the entity to be dumped
1621 static void emit_global(be_gas_decl_env_t *env, const ir_entity *entity)
1623 ir_type *type = get_entity_type(entity);
1624 ident *ld_ident = get_entity_ld_ident(entity);
1625 unsigned alignment = get_effective_entity_alignment(entity);
1626 be_gas_section_t section = determine_section(env, entity);
1627 ir_visibility visibility = get_entity_visibility(entity);
1628 ir_linkage linkage = get_entity_linkage(entity);
1630 /* Block labels are already emitted in the code. */
1631 if (type == get_code_type())
1634 /* we already emitted all methods with graphs in other functions like
1635 * be_gas_emit_function_prolog(). All others don't need to be emitted.
1637 if (is_Method_type(type) && section != GAS_SECTION_PIC_TRAMPOLINES) {
1641 be_dwarf_variable(entity);
1643 if (section == GAS_SECTION_BSS) {
1644 switch (visibility) {
1645 case ir_visibility_local:
1646 case ir_visibility_private:
1647 emit_local_common(entity);
1649 case ir_visibility_external:
1650 if (linkage & IR_LINKAGE_MERGE) {
1651 emit_common(entity);
1658 emit_visibility(entity);
1660 if (!is_po2(alignment))
1661 panic("alignment not a power of 2");
1663 emit_section(section, entity);
1665 if (section == GAS_SECTION_PIC_TRAMPOLINES
1666 || section == GAS_SECTION_PIC_SYMBOLS) {
1667 emit_indirect_symbol(entity, section);
1671 /* nothing left to do without an initializer */
1672 if (!entity_has_definition(entity))
1676 if (alignment > 1) {
1677 emit_align(alignment);
1679 if (be_gas_object_file_format == OBJECT_FILE_FORMAT_ELF
1680 && be_gas_emit_types
1681 && visibility != ir_visibility_private) {
1682 be_emit_cstring("\t.type\t");
1683 be_gas_emit_entity(entity);
1684 be_emit_cstring(", ");
1685 be_emit_char(be_gas_elf_type_char);
1686 be_emit_cstring("object\n\t.size\t");\
1687 be_gas_emit_entity(entity);
1688 be_emit_irprintf(", %u\n", get_type_size_bytes(type));
1691 if (get_id_str(ld_ident)[0] != '\0') {
1692 be_gas_emit_entity(entity);
1693 be_emit_cstring(":\n");
1694 be_emit_write_line();
1697 if (entity_is_null(entity)) {
1698 /* we should use .space for stuff in the bss segment */
1699 unsigned size = get_type_size_bytes(type);
1701 be_emit_irprintf("\t.space %u, 0\n", get_type_size_bytes(type));
1702 be_emit_write_line();
1704 } else if (entity_has_compound_ent_values(entity)) {
1705 emit_compound_graph_init(env, entity);
1707 assert(entity->initializer != NULL);
1708 emit_initializer(env, entity);
1713 * Dumps declarations of global variables and the initialization code.
1715 * @param gt a global like type, either the global or the TLS one
1716 * @param env an environment
1718 static void be_gas_emit_globals(ir_type *gt, be_gas_decl_env_t *env)
1720 size_t i, n = get_compound_n_members(gt);
1722 for (i = 0; i < n; i++) {
1723 ir_entity *ent = get_compound_member(gt, i);
1724 emit_global(env, ent);
1728 /* Generate all entities. */
1729 static void emit_global_decls(const be_main_env_t *main_env)
1731 be_gas_decl_env_t env;
1732 memset(&env, 0, sizeof(env));
1734 /* dump global type */
1735 env.main_env = main_env;
1736 env.section = (be_gas_section_t) -1;
1738 be_gas_emit_globals(get_glob_type(), &env);
1739 be_gas_emit_globals(get_tls_type(), &env);
1740 be_gas_emit_globals(get_segment_type(IR_SEGMENT_CONSTRUCTORS), &env);
1741 be_gas_emit_globals(get_segment_type(IR_SEGMENT_DESTRUCTORS), &env);
1742 be_gas_emit_globals(main_env->pic_symbols_type, &env);
1743 be_gas_emit_globals(main_env->pic_trampolines_type, &env);
1746 * ".subsections_via_symbols marks object files which are OK to divide
1747 * their section contents into individual blocks".
1748 * From my understanding this means no label points in the middle of an
1749 * object which we want to address as a whole. Firm code should be fine
1752 if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) {
1753 be_emit_cstring("\t.subsections_via_symbols\n");
1754 be_emit_write_line();
1758 void be_emit_jump_table(const ir_node *node, const ir_switch_table *table,
1759 ir_entity *entity, get_cfop_target_func get_cfop_target)
1761 unsigned n_outs = arch_get_irn_n_outs(node);
1762 const ir_node **targets = XMALLOCNZ(const ir_node*, n_outs);
1763 size_t n_entries = ir_switch_table_get_n_entries(table);
1764 unsigned long length = 0;
1766 const ir_edge_t *edge;
1768 const ir_node **labels;
1770 /* go over all proj's and collect their jump targets */
1771 foreach_out_edge(node, edge) {
1772 ir_node *proj = get_edge_src_irn(edge);
1773 long pn = get_Proj_proj(proj);
1774 ir_node *target = get_cfop_target(proj);
1775 assert(targets[pn] == NULL);
1776 targets[pn] = target;
1779 /* go over table to determine max value (note that we normalized the
1780 * ranges so that the minimum is 0) */
1781 for (e = 0; e < n_entries; ++e) {
1782 const ir_switch_table_entry *entry
1783 = ir_switch_table_get_entry_const(table, e);
1784 ir_tarval *max = entry->max;
1788 if (!tarval_is_long(max))
1789 panic("switch case overflow (%+F)", node);
1790 val = (unsigned long) get_tarval_long(max);
1796 /* the 16000 isn't a real limit of the architecture. But should protect us
1797 * from seamingly endless compiler runs */
1798 if (length > 16000) {
1799 /* switch lowerer should have broken this monster to pieces... */
1800 panic("too large switch encountered (%+F)", node);
1804 labels = XMALLOCNZ(const ir_node*, length);
1805 for (e = 0; e < n_entries; ++e) {
1806 const ir_switch_table_entry *entry
1807 = ir_switch_table_get_entry_const(table, e);
1808 ir_tarval *min = entry->min;
1809 ir_tarval *max = entry->max;
1810 const ir_node *target = targets[entry->pn];
1811 assert(entry->pn < (long)n_outs);
1813 unsigned long val = (unsigned long)get_tarval_long(max);
1814 labels[val] = target;
1816 unsigned long min_val;
1817 unsigned long max_val;
1819 if (!tarval_is_long(min))
1820 panic("switch case overflow (%+F)", node);
1821 min_val = (unsigned long)get_tarval_long(min);
1822 max_val = (unsigned long)get_tarval_long(max);
1823 assert(min_val <= max_val);
1824 for (i = min_val; i <= max_val; ++i) {
1831 if (entity != NULL) {
1832 be_gas_emit_switch_section(GAS_SECTION_RODATA);
1833 be_emit_cstring("\t.align 4\n");
1834 be_gas_emit_entity(entity);
1835 be_emit_cstring(":\n");
1838 for (i = 0; i < length; ++i) {
1839 const ir_node *block = labels[i];
1842 be_emit_cstring("\t.long ");
1843 be_gas_emit_block_name(block);
1845 be_emit_write_line();
1849 be_gas_emit_switch_section(GAS_SECTION_TEXT);
1855 static void emit_global_asms(void)
1857 size_t n = get_irp_n_asms();
1860 be_gas_emit_switch_section(GAS_SECTION_TEXT);
1861 for (i = 0; i < n; ++i) {
1862 ident *asmtext = get_irp_asm(i);
1864 be_emit_cstring("#APP\n");
1865 be_emit_write_line();
1866 be_emit_irprintf("%I\n", asmtext);
1867 be_emit_write_line();
1868 be_emit_cstring("#NO_APP\n");
1869 be_emit_write_line();
1873 void be_gas_begin_compilation_unit(const be_main_env_t *env)
1876 be_dwarf_unit_begin(env->cup_name);
1881 void be_gas_end_compilation_unit(const be_main_env_t *env)
1883 emit_global_decls(env);
1885 be_dwarf_unit_end();