2 * Copyright (C) 1995-2008 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
47 #include "beemitter.h"
48 #include "be_dbgout.h"
50 typedef struct obstack obstack_t;
52 /** by default, we generate assembler code for the Linux gas */
53 be_gas_flavour_t be_gas_flavour = GAS_FLAVOUR_NORMAL;
56 * Return the pseudo-instruction to be issued for a section switch
57 * depending on the current flavour.
59 * @param section the section to switch to
61 * @return the pseudo-instruction
63 static const char *get_section_name(be_gas_section_t section) {
64 static const char *text[GAS_FLAVOUR_MAX][GAS_SECTION_MAX] = {
70 ".section\t.tbss,\"awT\",@nobits",
71 ".section\t.ctors,\"aw\",@progbits"
76 ".section .rdata,\"dr\"",
78 ".section\t.tbss,\"awT\",@nobits",
79 ".section\t.ctors,\"aw\",@progbits"
86 ".section\t.tbss,\"awT\",@nobits",
87 ".section\t.ctors,\"aw\",@progbits"
91 assert((int) be_gas_flavour >= 0 && be_gas_flavour < GAS_FLAVOUR_MAX);
92 assert((int) section >= 0 && section < GAS_SECTION_MAX);
93 return text[be_gas_flavour][section];
97 * Emit necessary code to switch to a section.
99 * @param env the emitter environment
100 * @param section the section to switch to
102 void be_gas_emit_switch_section(be_gas_section_t section) {
104 be_emit_string(get_section_name(section));
106 be_emit_write_line();
110 * An environment containing all needed dumper data.
111 * Currently we create the file completely in memory first, then
112 * write it to the disk. This is an artifact from the old C-generating backend
113 * and even there NOT needed. So we might change it in the future.
115 typedef struct _be_gas_decl_env {
116 obstack_t *rodata_obst; /**< An obstack that will be filled with all rodata entities. */
117 obstack_t *data_obst; /**< An obstack that will be filled with the initialized entities. */
118 obstack_t *bss_obst; /**< An obstack that will be filled with the uninitialized entities. */
119 obstack_t *ctor_obst; /**< An obstack that will be filled with the constructor entities. */
120 const be_main_env_t *main_env; /**< The main backend environment, used for it's debug handle. */
121 waitq *worklist; /**< A worklist we use to place not yet handled entities on. */
124 /************************************************************************/
129 * @param obst the obstack where the data is written too
130 * @param tv the tarval
131 * @param bytes the width of the tarvals value in bytes
133 static void dump_arith_tarval(obstack_t *obst, tarval *tv, int bytes)
138 obstack_printf(obst, "0x%02x", get_tarval_sub_bits(tv, 0));
142 obstack_printf(obst, "0x%02x%02x", get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
146 obstack_printf(obst, "0x%02x%02x%02x%02x",
147 get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2), get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
151 obstack_printf(obst, "0x%02x%02x%02x%02x%02x%02x%02x%02x",
152 get_tarval_sub_bits(tv, 7), get_tarval_sub_bits(tv, 6), get_tarval_sub_bits(tv, 5), get_tarval_sub_bits(tv, 4),
153 get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2), get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
161 obstack_printf(obst, "0x%02x%02x%02x%02x%02x%02x%02x%02x"
162 "%02x%02x%02x%02x%02x%02x%02x%02x",
163 get_tarval_sub_bits(tv, 15), get_tarval_sub_bits(tv, 16),
164 get_tarval_sub_bits(tv, 13), get_tarval_sub_bits(tv, 12),
165 get_tarval_sub_bits(tv, 11), get_tarval_sub_bits(tv, 10),
166 get_tarval_sub_bits(tv, 9), get_tarval_sub_bits(tv, 8),
167 get_tarval_sub_bits(tv, 7), get_tarval_sub_bits(tv, 6),
168 get_tarval_sub_bits(tv, 5), get_tarval_sub_bits(tv, 4),
169 get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2),
170 get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
175 fprintf(stderr, "Try to dump an tarval with %d bytes\n", bytes);
181 * Return the label prefix for labeled blocks.
183 const char *be_gas_label_prefix(void) {
190 static void dump_label(obstack_t *obst, ir_label_t label) {
191 obstack_printf(obst, "%s%ld", be_gas_label_prefix(), label);
195 * Return the tarval of an atomic initializer.
197 * @param init a node representing the initializer (on the const code irg)
201 static tarval *get_atomic_init_tv(ir_node *init)
204 ir_mode *mode = get_irn_mode(init);
206 switch (get_irn_opcode(init)) {
209 init = get_Cast_op(init);
213 init = get_Conv_op(init);
217 return get_Const_tarval(init);
220 switch (get_SymConst_kind(init)) {
221 case symconst_type_size:
222 return new_tarval_from_long(get_type_size_bytes(get_SymConst_type(init)), mode);
224 case symconst_type_align:
225 return new_tarval_from_long(get_type_alignment_bytes(get_SymConst_type(init)), mode);
227 case symconst_ofs_ent:
228 return new_tarval_from_long(get_entity_offset(get_SymConst_entity(init)), mode);
230 case symconst_enum_const:
231 return get_enumeration_value(get_SymConst_enum(init));
247 * Dump an atomic value.
249 * @param env the gas output environment
250 * @param obst an obstack the output is written to
251 * @param init a node representing the atomic value (on the const code irg)
253 static void do_dump_atomic_init(be_gas_decl_env_t *env, obstack_t *obst,
256 ir_mode *mode = get_irn_mode(init);
257 int bytes = get_mode_size_bytes(mode);
262 init = skip_Id(init);
264 switch (get_irn_opcode(init)) {
267 do_dump_atomic_init(env, obst, get_Cast_op(init));
271 do_dump_atomic_init(env, obst, get_Conv_op(init));
275 tv = get_Const_tarval(init);
277 /* it's a arithmetic value */
278 dump_arith_tarval(obst, tv, bytes);
282 switch (get_SymConst_kind(init)) {
283 case symconst_addr_name:
284 obstack_printf(obst, "%s", get_id_str(get_SymConst_name(init)));
287 case symconst_addr_ent:
288 ent = get_SymConst_entity(init);
289 if(!is_entity_backend_marked(ent)) {
290 waitq_put(env->worklist, ent);
291 set_entity_backend_marked(ent, 1);
293 obstack_printf(obst, "%s", get_entity_ld_name(ent));
296 case symconst_ofs_ent:
297 ent = get_SymConst_entity(init);
298 #if 0 /* not needed, is it? */
299 if(!is_entity_backend_marked(ent)) {
300 waitq_put(env->worklist, ent);
301 set_entity_backend_marked(ent, 1);
304 obstack_printf(obst, "%d", get_entity_offset(ent));
307 case symconst_type_size:
308 obstack_printf(obst, "%u", get_type_size_bytes(get_SymConst_type(init)));
311 case symconst_type_align:
312 obstack_printf(obst, "%u", get_type_alignment_bytes(get_SymConst_type(init)));
315 case symconst_enum_const:
316 tv = get_enumeration_value(get_SymConst_enum(init));
317 dump_arith_tarval(obst, tv, bytes);
321 label = get_SymConst_label(init);
322 dump_label(obst, label);
326 assert(!"dump_atomic_init(): don't know how to init from this SymConst");
331 do_dump_atomic_init(env, obst, get_Add_left(init));
332 obstack_printf(obst, " + ");
333 do_dump_atomic_init(env, obst, get_Add_right(init));
337 do_dump_atomic_init(env, obst, get_Sub_left(init));
338 obstack_printf(obst, " - ");
339 do_dump_atomic_init(env, obst, get_Sub_right(init));
343 do_dump_atomic_init(env, obst, get_Mul_left(init));
344 obstack_printf(obst, " * ");
345 do_dump_atomic_init(env, obst, get_Mul_right(init));
349 assert(0 && "dump_atomic_init(): unknown IR-node");
354 * Dumps the type for given size (.byte, .long, ...)
356 * @param obst an obstack the output is written to
357 * @param size the size in bytes
359 static void dump_size_type(obstack_t *obst, size_t size) {
363 obstack_printf(obst, "\t.byte\t");
367 obstack_printf(obst, "\t.value\t");
371 obstack_printf(obst, "\t.long\t");
375 obstack_printf(obst, "\t.quad\t");
380 /* handled in arith */
384 obstack_printf(obst, "\t.octa\t");
388 fprintf(stderr, "Try to dump a type with %d bytes\n", size);
394 * Dump an atomic value to an obstack.
396 * @param env the gas output environment
397 * @param obst an obstack the output is written to
398 * @param init a node representing the atomic value (on the const code irg)
400 static void dump_atomic_init(be_gas_decl_env_t *env, obstack_t *obst,
403 ir_mode *mode = get_irn_mode(init);
404 int bytes = get_mode_size_bytes(mode);
406 dump_size_type(obst, bytes);
407 do_dump_atomic_init(env, obst, init);
408 obstack_printf(obst, "\n");
411 /************************************************************************/
412 /* Routines to dump global variables */
413 /************************************************************************/
415 static int initializer_is_string_const(const ir_initializer_t *initializer)
419 if(initializer->kind != IR_INITIALIZER_COMPOUND)
422 len = initializer->compound.n_initializers;
425 for(i = 0; i < len; ++i) {
429 ir_initializer_t *sub_initializer
430 = initializer->compound.initializers[i];
432 if(sub_initializer->kind != IR_INITIALIZER_TARVAL)
435 tv = sub_initializer->tarval.value;
436 mode = get_tarval_mode(tv);
438 if (!mode_is_int(mode)
439 || get_mode_size_bits(mode) != get_mode_size_bits(mode_Bs))
442 c = get_tarval_long(tv);
444 if (!isgraph(c) && !isspace(c))
456 * Determine if an entity is a string constant
457 * @param ent The entity
458 * @return 1 if it is a string constant, 0 otherwise
460 static int ent_is_string_const(ir_entity *ent)
462 ir_type *type, *element_type;
466 type = get_entity_type(ent);
468 /* if it's an array */
469 if (!is_Array_type(type))
472 element_type = get_array_element_type(type);
474 /* and the array's element type is primitive */
475 if (!is_Primitive_type(element_type))
478 /* and the mode of the element type is an int of
479 * the same size as the byte mode */
480 mode = get_type_mode(element_type);
481 if (!mode_is_int(mode)
482 || get_mode_size_bits(mode) != get_mode_size_bits(mode_Bs))
485 if(ent->has_initializer) {
489 /* if it contains only printable chars and a 0 at the end */
490 n = get_compound_ent_n_values(ent);
491 for (i = 0; i < n; ++i) {
492 ir_node *irn = get_compound_ent_value(ent, i);
496 c = (int) get_tarval_long(get_Const_tarval(irn));
498 if((i < n - 1 && !(isgraph(c) || isspace(c)))
499 || (i == n - 1 && c != '\0'))
504 /* then we can emit it as a string constant */
509 * Dump a string constant.
510 * No checks are made!!
512 * @param obst The obst to dump on.
513 * @param ent The entity to dump.
515 static void dump_string_cst(obstack_t *obst, ir_entity *ent)
522 obstack_printf(obst, "\t.string \"");
523 n = get_compound_ent_n_values(ent);
525 for (i = 0; i < n-1; ++i) {
529 irn = get_compound_ent_value(ent, i);
530 c = (int) get_tarval_long(get_Const_tarval(irn));
533 case '"' : obstack_printf(obst, "\\\""); break;
534 case '\n': obstack_printf(obst, "\\n"); break;
535 case '\r': obstack_printf(obst, "\\r"); break;
536 case '\t': obstack_printf(obst, "\\t"); break;
537 case '\\': obstack_printf(obst, "\\\\"); break;
540 obstack_printf(obst, "%c", c);
542 obstack_printf(obst, "\\%o", c);
546 obstack_printf(obst, "\"\n");
548 type = get_entity_type(ent);
549 type_size = get_type_size_bytes(type);
550 remaining_space = type_size - n;
551 assert(remaining_space >= 0);
552 if(remaining_space > 0) {
553 obstack_printf(obst, "\t.skip\t%d\n", remaining_space);
557 static void dump_string_initializer(obstack_t *obst,
558 const ir_initializer_t *initializer)
562 obstack_printf(obst, "\t.string \"");
564 len = initializer->compound.n_initializers;
565 for(i = 0; i < len - 1; ++i) {
566 const ir_initializer_t *sub_initializer
567 = get_initializer_compound_value(initializer, i);
569 tarval *tv = get_initializer_tarval_value(sub_initializer);
570 int c = get_tarval_long(tv);
573 case '"' : obstack_printf(obst, "\\\""); break;
574 case '\n': obstack_printf(obst, "\\n"); break;
575 case '\r': obstack_printf(obst, "\\r"); break;
576 case '\t': obstack_printf(obst, "\\t"); break;
577 case '\\': obstack_printf(obst, "\\\\"); break;
580 obstack_printf(obst, "%c", c);
582 obstack_printf(obst, "\\%o", c);
586 obstack_printf(obst, "\"\n");
589 enum normal_or_bitfield_kind {
596 enum normal_or_bitfield_kind kind;
600 unsigned char bf_val;
602 } normal_or_bitfield;
604 static int is_type_variable_size(ir_type *type)
611 static size_t get_initializer_size(const ir_initializer_t *initializer,
614 switch(get_initializer_kind(initializer)) {
615 case IR_INITIALIZER_TARVAL: {
616 assert(get_tarval_mode(get_initializer_tarval_value(initializer)) == get_type_mode(type));
617 return get_type_size_bytes(type);
619 case IR_INITIALIZER_CONST:
620 case IR_INITIALIZER_NULL:
621 return get_type_size_bytes(type);
622 case IR_INITIALIZER_COMPOUND: {
623 if(!is_type_variable_size(type)) {
624 return get_type_size_bytes(type);
627 = get_initializer_compound_n_entries(initializer);
629 unsigned initializer_size = get_type_size_bytes(type);
630 for(i = 0; i < n_entries; ++i) {
631 ir_entity *entity = get_compound_member(type, i);
632 ir_type *type = get_entity_type(entity);
634 const ir_initializer_t *sub_initializer
635 = get_initializer_compound_value(initializer, i);
637 unsigned offset = get_entity_offset(entity);
638 unsigned size = get_initializer_size(sub_initializer, type);
640 if(offset + size > initializer_size) {
641 initializer_size = offset + size;
644 return initializer_size;
649 panic("found invalid initializer");
653 static normal_or_bitfield *glob_vals;
654 static size_t max_vals;
657 static void dump_bitfield(normal_or_bitfield *vals, size_t offset_bits,
658 const ir_initializer_t *initializer, ir_type *type)
660 unsigned char last_bits = 0;
661 ir_mode *mode = get_type_mode(type);
663 unsigned char curr_bits;
667 switch(get_initializer_kind(initializer)) {
668 case IR_INITIALIZER_NULL:
670 case IR_INITIALIZER_TARVAL:
671 tv = get_initializer_tarval_value(initializer);
673 case IR_INITIALIZER_CONST: {
674 ir_node *node = get_initializer_const_value(initializer);
675 if(!is_Const(node)) {
676 panic("bitfield initializer not a Const node");
678 tv = get_Const_tarval(node);
681 case IR_INITIALIZER_COMPOUND:
682 panic("bitfield initializer is compound");
685 panic("Couldn't get numeric value for bitfield initializer\n");
688 /* normalize offset */
689 vals += offset_bits >> 3;
691 value_len = get_mode_size_bits(mode);
693 /* combine bits with existing bits */
694 for (j = 0; value_len + (int) offset_bits > 0; ++j) {
695 assert((size_t) (vals - glob_vals) + j < max_vals);
696 assert(vals[j].kind == BITFIELD ||
697 (vals[j].kind == NORMAL && vals[j].v.value == NULL));
698 vals[j].kind = BITFIELD;
699 curr_bits = get_tarval_sub_bits(tv, j);
701 |= (last_bits >> (8 - offset_bits)) | (curr_bits << offset_bits);
703 last_bits = curr_bits;
707 static void dump_ir_initializer(normal_or_bitfield *vals,
708 const ir_initializer_t *initializer,
711 assert((size_t) (vals - glob_vals) < max_vals);
713 switch(get_initializer_kind(initializer)) {
714 case IR_INITIALIZER_NULL:
716 case IR_INITIALIZER_TARVAL: {
719 assert(vals->kind != BITFIELD);
721 vals->v.tarval = get_initializer_tarval_value(initializer);
722 assert(get_type_mode(type) == get_tarval_mode(vals->v.tarval));
723 for(i = 1; i < get_type_size_bytes(type); ++i) {
724 vals[i].kind = NORMAL;
725 vals[i].v.value = NULL;
729 case IR_INITIALIZER_CONST: {
732 assert(vals->kind != BITFIELD);
734 vals->v.value = get_initializer_const_value(initializer);
735 for(i = 1; i < get_type_size_bytes(type); ++i) {
736 vals[i].kind = NORMAL;
737 vals[i].v.value = NULL;
741 case IR_INITIALIZER_COMPOUND: {
743 size_t n = get_initializer_compound_n_entries(initializer);
745 if(is_Array_type(type)) {
746 ir_type *element_type = get_array_element_type(type);
747 size_t skip = get_type_size_bytes(element_type);
748 size_t alignment = get_type_alignment_bytes(element_type);
749 size_t misalign = skip % alignment;
751 skip += alignment - misalign;
754 for(i = 0; i < n; ++i) {
755 ir_initializer_t *sub_initializer
756 = get_initializer_compound_value(initializer, i);
758 dump_ir_initializer(vals, sub_initializer, element_type);
764 assert(is_compound_type(type));
765 n_members = get_compound_n_members(type);
766 for(i = 0; i < n_members; ++i) {
767 ir_entity *member = get_compound_member(type, i);
768 size_t offset = get_entity_offset(member);
769 ir_type *subtype = get_entity_type(member);
770 ir_mode *mode = get_type_mode(subtype);
771 ir_initializer_t *sub_initializer;
773 assert(i < get_initializer_compound_n_entries(initializer));
775 = get_initializer_compound_value(initializer, i);
779 = get_entity_offset_bits_remainder(member);
780 size_t value_len = get_mode_size_bits(mode);
782 if(offset_bits != 0 ||
783 (value_len != 8 && value_len != 16 && value_len != 32
784 && value_len != 64)) {
785 dump_bitfield(&vals[offset], offset_bits,
786 sub_initializer, subtype);
791 dump_ir_initializer(&vals[offset], sub_initializer, subtype);
798 panic("invalid ir_initializer kind found");
801 static void dump_initializer(be_gas_decl_env_t *env, obstack_t *obst,
804 const ir_initializer_t *initializer = entity->attr.initializer;
806 normal_or_bitfield *vals;
810 if(initializer_is_string_const(initializer)) {
811 dump_string_initializer(obst, initializer);
815 type = get_entity_type(entity);
816 size = get_initializer_size(initializer, type);
822 * In the worst case, every initializer allocates one byte.
823 * Moreover, initializer might be big, do not allocate on stack.
825 vals = xcalloc(size, sizeof(vals[0]));
832 dump_ir_initializer(vals, initializer, type);
834 /* now write values sorted */
835 for (k = 0; k < size; ) {
836 int space = 0, skip = 0;
837 if (vals[k].kind == NORMAL) {
838 if(vals[k].v.value != NULL) {
839 dump_atomic_init(env, obst, vals[k].v.value);
840 skip = get_mode_size_bytes(get_irn_mode(vals[k].v.value)) - 1;
844 } else if(vals[k].kind == TARVAL) {
845 tarval *tv = vals[k].v.tarval;
846 size_t size = get_mode_size_bytes(get_tarval_mode(tv));
851 dump_size_type(obst, size);
852 dump_arith_tarval(obst, tv, size);
853 obstack_1grow(obst, '\n');
855 assert(vals[k].kind == BITFIELD);
856 obstack_printf(obst, "\t.byte\t%d\n", vals[k].v.bf_val);
860 while (k < size && vals[k].kind == NORMAL && vals[k].v.value == NULL) {
869 obstack_printf(obst, "\t.skip\t%d\n", space);
876 * Dump an initializer for a compound entity.
878 static void dump_compound_init(be_gas_decl_env_t *env, obstack_t *obst,
881 normal_or_bitfield *vals;
883 unsigned k, last_ofs;
885 if(ent->has_initializer) {
886 dump_initializer(env, obst, ent);
890 n = get_compound_ent_n_values(ent);
892 /* Find the initializer size. Sorrily gcc support a nasty feature:
893 The last field of a compound may be a flexible array. This allows
894 initializers bigger than the type size. */
895 last_ofs = get_type_size_bytes(get_entity_type(ent));
896 for (i = 0; i < n; ++i) {
897 unsigned offset = get_compound_ent_value_offset_bytes(ent, i);
898 unsigned bits_remainder = get_compound_ent_value_offset_bit_remainder(ent, i);
899 ir_node *value = get_compound_ent_value(ent, i);
900 unsigned value_len = get_mode_size_bits(get_irn_mode(value));
902 offset += (value_len + bits_remainder + 7) >> 3;
904 if (offset > last_ofs) {
910 * In the worst case, every initializer allocates one byte.
911 * Moreover, initializer might be big, do not allocate on stack.
913 vals = xcalloc(last_ofs, sizeof(vals[0]));
915 /* collect the values and store them at the offsets */
916 for (i = 0; i < n; ++i) {
917 unsigned offset = get_compound_ent_value_offset_bytes(ent, i);
918 int offset_bits = get_compound_ent_value_offset_bit_remainder(ent, i);
919 ir_node *value = get_compound_ent_value(ent, i);
920 int value_len = get_mode_size_bits(get_irn_mode(value));
922 assert(offset_bits >= 0);
924 if (offset_bits != 0 ||
925 (value_len != 8 && value_len != 16 && value_len != 32 && value_len != 64)) {
926 tarval *tv = get_atomic_init_tv(value);
927 unsigned char curr_bits, last_bits = 0;
929 panic("Couldn't get numeric value for bitfield initializer '%s'\n",
930 get_entity_ld_name(ent));
932 /* normalize offset */
933 offset += offset_bits >> 3;
936 for (j = 0; value_len + offset_bits > 0; ++j) {
937 assert(offset + j < last_ofs);
938 assert(vals[offset + j].kind == BITFIELD || vals[offset + j].v.value == NULL);
939 vals[offset + j].kind = BITFIELD;
940 curr_bits = get_tarval_sub_bits(tv, j);
941 vals[offset + j].v.bf_val |= (last_bits >> (8 - offset_bits)) | (curr_bits << offset_bits);
943 last_bits = curr_bits;
948 assert(offset < last_ofs);
949 assert(vals[offset].kind == NORMAL);
950 for (i = 1; i < value_len / 8; ++i) {
951 assert(vals[offset + i].v.value == NULL);
953 vals[offset].v.value = value;
957 /* now write them sorted */
958 for (k = 0; k < last_ofs; ) {
959 int space = 0, skip = 0;
960 if (vals[k].kind == NORMAL) {
961 if(vals[k].v.value != NULL) {
962 dump_atomic_init(env, obst, vals[k].v.value);
963 skip = get_mode_size_bytes(get_irn_mode(vals[k].v.value)) - 1;
968 assert(vals[k].kind == BITFIELD);
969 obstack_printf(obst, "\t.byte\t%d\n", vals[k].v.bf_val);
973 while (k < last_ofs && vals[k].kind == NORMAL && vals[k].v.value == NULL) {
982 obstack_printf(obst, "\t.skip\t%d\n", space);
988 * Dump a global entity.
990 * @param env the gas output environment
991 * @param ent the entity to be dumped
992 * @param emit_commons if non-zero, emit commons (non-local uninitialized entities)
994 static void dump_global(be_gas_decl_env_t *env, ir_entity *ent, int emit_commons)
997 ir_type *type = get_entity_type(ent);
998 const char *ld_name = get_entity_ld_name(ent);
999 unsigned align = get_type_alignment_bytes(type);
1000 int emit_as_common = 0;
1001 ir_variability variability;
1002 ir_visibility visibility;
1004 obst = env->data_obst;
1005 if (is_Method_type(type)) {
1006 if (get_method_img_section(ent) == section_constructors) {
1007 obst = env->ctor_obst;
1008 obstack_printf(obst, ".balign\t%u\n", align);
1009 dump_size_type(obst, align);
1010 obstack_printf(obst, "%s\n", ld_name);
1015 variability = get_entity_variability(ent);
1016 visibility = get_entity_visibility(ent);
1017 if (variability == variability_constant) {
1018 /* a constant entity, put it on the rdata */
1019 obst = env->rodata_obst;
1020 } else if (variability == variability_uninitialized) {
1021 /* uninitialized entity put it in bss segment */
1022 obst = env->bss_obst;
1023 if (emit_commons && visibility != visibility_local)
1027 be_dbg_variable(env->main_env->db_handle, obst, ent);
1029 /* global or not global */
1030 if (visibility == visibility_external_visible && !emit_as_common) {
1031 obstack_printf(obst, ".global\t%s\n", ld_name);
1032 } else if(visibility == visibility_external_allocated) {
1033 obstack_printf(obst, ".global\t%s\n", ld_name);
1034 /* we can return now... */
1038 if (align > 1 && !emit_as_common) {
1039 obstack_printf(obst, ".balign\t%u\n", align);
1042 if (!emit_as_common) {
1043 obstack_printf(obst, "%s:\n", ld_name);
1046 if (variability == variability_uninitialized) {
1047 if (emit_as_common) {
1048 switch (be_gas_flavour) {
1049 case GAS_FLAVOUR_NORMAL:
1050 case GAS_FLAVOUR_YASM:
1051 obstack_printf(obst, "\t.comm %s,%u,%u\n",
1052 ld_name, get_type_size_bytes(type), align);
1054 case GAS_FLAVOUR_MINGW:
1055 obstack_printf(obst, "\t.comm %s,%u # %u\n",
1056 ld_name, get_type_size_bytes(type), align);
1058 case GAS_FLAVOUR_MAX:
1059 panic("invalid gas flavour selected");
1062 obstack_printf(obst, "\t.zero %u\n", get_type_size_bytes(type));
1065 if (is_atomic_entity(ent)) {
1066 dump_atomic_init(env, obst, get_atomic_ent_value(ent));
1068 /* sort_compound_ent_values(ent); */
1070 switch (get_type_tpop_code(get_entity_type(ent))) {
1072 if (ent_is_string_const(ent))
1073 dump_string_cst(obst, ent);
1075 dump_compound_init(env, obst, ent);
1080 dump_compound_init(env, obst, ent);
1090 * Dumps declarations of global variables and the initialization code.
1092 * @param gt a global like type, either the global or the TLS one
1093 * @param env an environment
1094 * @param emit_commons if non-zero, emit commons (non-local uninitialized entities)
1095 * @param only_emit_marked if non-zero, external allocated entities that do not have
1096 * its visited flag set are ignored
1098 static void be_gas_dump_globals(ir_type *gt, be_gas_decl_env_t *env,
1099 int emit_commons, int only_emit_marked)
1101 int i, n = get_compound_n_members(gt);
1102 waitq *worklist = new_waitq();
1104 if (only_emit_marked) {
1105 for (i = 0; i < n; i++) {
1106 ir_entity *ent = get_compound_member(gt, i);
1107 if (is_entity_backend_marked(ent) ||
1108 get_entity_visibility(ent) != visibility_external_allocated) {
1109 waitq_put(worklist, ent);
1110 set_entity_backend_marked(ent, 1);
1114 for (i = 0; i < n; i++) {
1115 ir_entity *ent = get_compound_member(gt, i);
1116 set_entity_backend_marked(ent, 1);
1117 waitq_put(worklist, ent);
1121 env->worklist = worklist;
1123 while (!waitq_empty(worklist)) {
1124 ir_entity *ent = waitq_get(worklist);
1126 dump_global(env, ent, emit_commons);
1129 del_waitq(worklist);
1130 env->worklist = NULL;
1133 /************************************************************************/
1135 /* Generate all entities. */
1136 void be_gas_emit_decls(const be_main_env_t *main_env,
1137 int only_emit_marked_entities)
1139 be_gas_decl_env_t env;
1147 /* dump the global type */
1148 obstack_init(&rodata);
1149 obstack_init(&data);
1151 obstack_init(&ctor);
1153 env.rodata_obst = &rodata;
1154 env.data_obst = &data;
1155 env.bss_obst = &bss;
1156 env.ctor_obst = &ctor;
1157 env.main_env = main_env;
1159 be_gas_dump_globals(get_glob_type(), &env, 1, only_emit_marked_entities);
1161 size = obstack_object_size(&data);
1162 cp = obstack_finish(&data);
1164 be_gas_emit_switch_section(GAS_SECTION_DATA);
1165 be_emit_string_len(cp, size);
1166 be_emit_write_line();
1169 size = obstack_object_size(&rodata);
1170 cp = obstack_finish(&rodata);
1172 be_gas_emit_switch_section(GAS_SECTION_RODATA);
1173 be_emit_string_len(cp, size);
1174 be_emit_write_line();
1177 size = obstack_object_size(&bss);
1178 cp = obstack_finish(&bss);
1180 be_gas_emit_switch_section(GAS_SECTION_COMMON);
1181 be_emit_string_len(cp, size);
1182 be_emit_write_line();
1185 size = obstack_object_size(&ctor);
1186 cp = obstack_finish(&ctor);
1188 be_gas_emit_switch_section(GAS_SECTION_CTOR);
1189 be_emit_string_len(cp, size);
1190 be_emit_write_line();
1193 obstack_free(&rodata, NULL);
1194 obstack_free(&data, NULL);
1195 obstack_free(&bss, NULL);
1196 obstack_free(&ctor, NULL);
1198 /* dump the Thread Local Storage */
1199 obstack_init(&data);
1201 env.rodata_obst = &data;
1202 env.data_obst = &data;
1203 env.bss_obst = &data;
1204 env.ctor_obst = NULL;
1206 be_gas_dump_globals(get_tls_type(), &env, 0, only_emit_marked_entities);
1208 size = obstack_object_size(&data);
1209 cp = obstack_finish(&data);
1211 be_gas_emit_switch_section(GAS_SECTION_TLS);
1212 be_emit_cstring(".balign\t32\n");
1213 be_emit_write_line();
1214 be_emit_string_len(cp, size);
1215 be_emit_write_line();
1218 obstack_free(&data, NULL);