X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fbegnuas.c;h=e7e0f5e394d74850753a2c2b365ebe5813789ca8;hb=945c6c2ceebef5e41c0486c31f49d2319cacb3da;hp=f67f76366072a9552da94859f5493f6c37000a16;hpb=2bc2dd4bd4f64982e9c5d2f1ea70d63d0eb10044;p=libfirm diff --git a/ir/be/begnuas.c b/ir/be/begnuas.c index f67f76366..e7e0f5e39 100644 --- a/ir/be/begnuas.c +++ b/ir/be/begnuas.c @@ -1,20 +1,6 @@ /* - * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved. - * * This file is part of libFirm. - * - * This file may be distributed and/or modified under the terms of the - * GNU General Public License version 2 as published by the Free Software - * Foundation and appearing in the file LICENSE.GPL included in the - * packaging of this file. - * - * Licensees holding valid libFirm Professional Edition licenses may use - * this file in accordance with the libFirm Commercial License. - * Agreement provided with the Software. - * - * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE - * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR - * PURPOSE. + * Copyright (C) 2012 University of Karlsruhe. */ /** @@ -22,7 +8,6 @@ * @brief Dumps global variables and constants as gas assembler. * @author Christian Wuerdig, Matthias Braun * @date 04.11.2005 - * @version $Id$ */ #include "config.h" @@ -37,122 +22,495 @@ #include "tv.h" #include "irnode.h" #include "irprog.h" -#include "pdeq.h" #include "entity_t.h" #include "error.h" +#include "util.h" +#include "execfreq.h" #include "be_t.h" +#include "bearch.h" #include "beemitter.h" -#include "be_dbgout.h" +#include "bedwarf.h" /** by default, we generate assembler code for the Linux gas */ object_file_format_t be_gas_object_file_format = OBJECT_FILE_FORMAT_ELF; +elf_variant_t be_gas_elf_variant = ELF_VARIANT_NORMAL; bool be_gas_emit_types = true; -char be_gas_elf_type_char = '@'; +char be_gas_elf_type_char = '@'; static be_gas_section_t current_section = (be_gas_section_t) -1; +static pmap *block_numbers; +static unsigned next_block_nr; /** - * Return the pseudo-instruction to be issued for a section switch - * depending on the current flavour. - * - * @param section the section to switch to - * - * @return the pseudo-instruction + * An environment containing all needed dumper data. + * Currently we create the file completely in memory first, then + * write it to the disk. This is an artifact from the old C-generating backend + * and even there NOT needed. So we might change it in the future. */ -static const char *get_section_name(be_gas_section_t section) +typedef struct be_gas_decl_env { + be_gas_section_t section; + const be_main_env_t *main_env; +} be_gas_decl_env_t; + +static void emit_section_macho(be_gas_section_t section) { - static const char *text[OBJECT_FILE_FORMAT_LAST+1][GAS_SECTION_LAST+1] = { - { /* OBJECT_FILE_FORMAT_ELF */ - ".section\t.text", - ".section\t.data", - ".section\t.rodata", - ".section\t.bss", - ".section\t.tbss,\"awT\",@nobits", - ".section\t.ctors,\"aw\",@progbits", - ".section\t.dtors,\"aw\",@progbits", - NULL, /* no cstring section */ - NULL, - NULL - }, - { /* OBJECT_FILE_FORMAT_COFF */ - ".section\t.text", - ".section\t.data", - ".section .rdata,\"dr\"", - ".section\t.bss", - ".section\t.tbss,\"awT\",@nobits", - ".section\t.ctors,\"w\"", - ".section\t.dtors,\"w\"", - NULL, - NULL, - NULL - }, - { /* OBJECT_FILE_FORMAT_MACH_O */ - ".text", - ".data", - ".const", - ".data", - NULL, /* TLS is not supported on Mach-O */ - ".mod_init_func", - NULL, /* are there destructors on mach-o? */ - ".cstring", - ".section\t__IMPORT,__jump_table,symbol_stubs,self_modifying_code+pure_instructions,5", - ".section\t__IMPORT,__pointers,non_lazy_symbol_pointers" + be_gas_section_t base = section & GAS_SECTION_TYPE_MASK; + be_gas_section_t flags = section & ~GAS_SECTION_TYPE_MASK; + const char *name; + + if (current_section == section) + return; + current_section = section; + + /* shortforms */ + if (flags == 0) { + switch (base) { + case GAS_SECTION_TEXT: name = "text"; break; + case GAS_SECTION_DATA: name = "data"; break; + case GAS_SECTION_RODATA: name = "const"; break; + case GAS_SECTION_BSS: name = "data"; break; + case GAS_SECTION_CONSTRUCTORS: name = "mod_init_func"; break; + case GAS_SECTION_DESTRUCTORS: name = "mod_term_func"; break; + case GAS_SECTION_PIC_TRAMPOLINES: name = "section\t__IMPORT,__jump_table,symbol_stubs,self_modifying_code+pure_instructions,5"; break; + case GAS_SECTION_PIC_SYMBOLS: name = "section\t__IMPORT,__pointers,non_lazy_symbol_pointers"; break; + case GAS_SECTION_CSTRING: name = "cstring"; break; + case GAS_SECTION_DEBUG_INFO: name = "section __DWARF,__debug_info,regular,debug"; break; + case GAS_SECTION_DEBUG_ABBREV: name = "section __DWARF,__debug_abbrev,regular,debug"; break; + case GAS_SECTION_DEBUG_LINE: name = "section __DWARF,__debug_line,regular,debug"; break; + case GAS_SECTION_DEBUG_PUBNAMES: name = "section __DWARF,__debug_pubnames,regular,debug"; break; + case GAS_SECTION_DEBUG_FRAME: name = "section __DWARF,__debug_frame,regular,debug"; break; + default: panic("unsupported scetion type 0x%X", section); + } + } else if (flags & GAS_SECTION_FLAG_COMDAT) { + switch (base) { + case GAS_SECTION_TEXT: name = "section __TEXT,__textcoal_nt,coalesced,pure_instructions"; break; + case GAS_SECTION_BSS: + case GAS_SECTION_DATA: name = "section __DATA,__datacoal_nt,coalesced"; break; + case GAS_SECTION_RODATA: name = "section __TEXT,__const_coal,coalesced"; break; + case GAS_SECTION_CSTRING: name = "section __TEXT,__const_coal,coalesced"; break; + default: panic("unsupported scetion type 0x%X", section); } + } else if (flags & GAS_SECTION_FLAG_TLS) { + panic("thread local storage not supported on macho (section 0x%X)", section); + } else { + panic("unsupported section type 0x%X", section); + } + be_emit_irprintf("\t.%s\n", name); + be_emit_write_line(); +} + +static void emit_section_sparc(be_gas_section_t section, const ir_entity *entity) +{ + be_gas_section_t base = section & GAS_SECTION_TYPE_MASK; + be_gas_section_t flags = section & ~GAS_SECTION_TYPE_MASK; + static const char *const basename[GAS_SECTION_LAST+1] = { + "text", + "data", + "rodata", + "bss", + "ctors", + "dtors", + NULL, /* cstring */ + NULL, /* pic trampolines */ + NULL, /* pic symbols */ + "debug_info", + "debug_abbrev", + "debug_line", + "debug_pubnames" + "debug_frame", }; - assert((int) be_gas_object_file_format >= 0 - && be_gas_object_file_format <= OBJECT_FILE_FORMAT_LAST); - assert((int) section >= 0 && section <= GAS_SECTION_LAST); - return text[be_gas_object_file_format][section]; + if (current_section == section && !(section & GAS_SECTION_FLAG_COMDAT)) + return; + current_section = section; + + be_emit_cstring("\t.section\t\"."); + + /* Part1: section-name */ + if (flags & GAS_SECTION_FLAG_TLS) + be_emit_char('t'); + assert(base < (be_gas_section_t)ARRAY_SIZE(basename)); + be_emit_string(basename[base]); + + if (flags & GAS_SECTION_FLAG_COMDAT) { + be_emit_char('.'); + be_gas_emit_entity(entity); + } + be_emit_char('"'); + + /* for the simple sections we're done here */ + if (flags == 0) + goto end; + + be_emit_cstring(",#alloc"); + + switch (base) { + case GAS_SECTION_TEXT: be_emit_cstring(",#execinstr"); break; + case GAS_SECTION_DATA: + case GAS_SECTION_BSS: be_emit_cstring(",#write"); break; + default: + /* nothing */ + break; + } + if (flags & GAS_SECTION_FLAG_TLS) { + be_emit_cstring(",#tls"); + } + +end: + be_emit_char('\n'); + be_emit_write_line(); } -void be_gas_emit_switch_section(be_gas_section_t section) +static void emit_section(be_gas_section_t section, const ir_entity *entity) { - if (current_section == section) + be_gas_section_t base = section & GAS_SECTION_TYPE_MASK; + be_gas_section_t flags = section & ~GAS_SECTION_TYPE_MASK; + const char *f; + static const struct { + const char *name; + const char *type; + const char *flags; + } sectioninfos[GAS_SECTION_LAST+1] = { + { "text", "progbits", "ax" }, + { "data", "progbits", "aw" }, + { "rodata", "progbits", "a" }, + { "bss", "nobits", "aw" }, + { "ctors", "progbits", "aw" }, + { "dtors", "progbits", "aw" }, + { NULL, NULL, NULL }, /* cstring */ + { NULL, NULL, NULL }, /* pic trampolines */ + { NULL, NULL, NULL }, /* pic symbols */ + { "debug_info", "progbits", "" }, + { "debug_abbrev", "progbits", "" }, + { "debug_line", "progbits", "" }, + { "debug_pubnames", "progbits", "" }, + { "debug_frame", "progbits", "" }, + }; + + if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) { + emit_section_macho(section); + return; + } else if(be_gas_elf_variant == ELF_VARIANT_SPARC) { + emit_section_sparc(section, entity); + return; + } + + if (current_section == section && !(section & GAS_SECTION_FLAG_COMDAT)) return; + current_section = section; - be_emit_char('\t'); - be_emit_string(get_section_name(section)); + /* shortforms */ + if (flags == 0) { + switch (base) { + case GAS_SECTION_TEXT: + be_emit_cstring("\t.text\n"); + be_emit_write_line(); + return; + case GAS_SECTION_DATA: + be_emit_cstring("\t.data\n"); + be_emit_write_line(); + return; + case GAS_SECTION_RODATA: + be_emit_cstring("\t.section\t.rodata\n"); + be_emit_write_line(); + return; + case GAS_SECTION_BSS: + be_emit_cstring("\t.bss\n"); + be_emit_write_line(); + return; + default: + break; + } + } + + assert(base < (be_gas_section_t) ARRAY_SIZE(sectioninfos)); + be_emit_cstring("\t.section\t."); + /* section name */ + if (flags & GAS_SECTION_FLAG_TLS) + be_emit_char('t'); + be_emit_string(sectioninfos[base].name); + if (flags & GAS_SECTION_FLAG_COMDAT) { + be_emit_char('.'); + be_gas_emit_entity(entity); + } + + /* section flags */ + be_emit_cstring(",\""); + for (f = sectioninfos[base].flags; *f != '\0'; ++f) { + be_emit_char(*f); + } + if (flags & GAS_SECTION_FLAG_TLS) + be_emit_char('T'); + if (flags & GAS_SECTION_FLAG_COMDAT) + be_emit_char('G'); + + /* section type */ + if (be_gas_object_file_format != OBJECT_FILE_FORMAT_COFF) { + be_emit_cstring("\","); + be_emit_char(be_gas_elf_type_char); + be_emit_string(sectioninfos[base].type); + } + + if (flags & GAS_SECTION_FLAG_COMDAT) { + be_emit_char(','); + be_gas_emit_entity(entity); + be_emit_cstring(",comdat"); + } be_emit_char('\n'); be_emit_write_line(); - current_section = section; } -static void emit_entity_visibility(const ir_entity *entity) + + +void be_gas_emit_switch_section(be_gas_section_t section) +{ + /* you have to produce a switch_section call with entity manually + * for comdat sections */ + assert( !(section & GAS_SECTION_FLAG_COMDAT)); + + emit_section(section, NULL); +} + +static ir_tarval *get_initializer_tarval(const ir_initializer_t *initializer) +{ + if (initializer->kind == IR_INITIALIZER_TARVAL) + return initializer->tarval.value; + if (initializer->kind == IR_INITIALIZER_CONST) { + ir_node *node = initializer->consti.value; + if (is_Const(node)) { + return get_Const_tarval(node); + } + } + return get_tarval_undefined(); +} + +static bool initializer_is_string_const(const ir_initializer_t *initializer) +{ + size_t i, len; + bool found_printable = false; + + if (initializer->kind != IR_INITIALIZER_COMPOUND) + return false; + + len = initializer->compound.n_initializers; + if (len < 1) + return false; + for (i = 0; i < len; ++i) { + int c; + ir_tarval *tv; + ir_mode *mode; + ir_initializer_t *sub_initializer + = initializer->compound.initializers[i]; + + tv = get_initializer_tarval(sub_initializer); + if (!tarval_is_constant(tv)) + return false; + + mode = get_tarval_mode(tv); + if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8) + return false; + + c = get_tarval_long(tv); + if (isgraph(c) || isspace(c)) + found_printable = true; + else if (c != 0) + return false; + + if (i == len - 1 && c != '\0') + return false; + } + + return found_printable; +} + +static bool initializer_is_null(const ir_initializer_t *initializer) +{ + switch (initializer->kind) { + case IR_INITIALIZER_NULL: + return true; + case IR_INITIALIZER_TARVAL: { + ir_tarval *tv = initializer->tarval.value; + return tarval_is_null(tv); + } + case IR_INITIALIZER_CONST: { + ir_node *value = initializer->consti.value; + if (!is_Const(value)) + return false; + return is_Const_null(value); + } + case IR_INITIALIZER_COMPOUND: { + size_t i; + for (i = 0; i < initializer->compound.n_initializers; ++i) { + ir_initializer_t *subinitializer + = initializer->compound.initializers[i]; + if (!initializer_is_null(subinitializer)) + return false; + } + return true; + } + } + panic("invalid initializer in initializer_is_null"); +} + +/** + * Determine if an entity is a string constant + * @param ent The entity + * @return 1 if it is a string constant, 0 otherwise + */ +static int entity_is_string_const(const ir_entity *ent) +{ + ir_type *type, *element_type; + ir_mode *mode; + + type = get_entity_type(ent); + + /* if it's an array */ + if (!is_Array_type(type)) + return 0; + + element_type = get_array_element_type(type); + + /* and the array's element type is primitive */ + if (!is_Primitive_type(element_type)) + return 0; + + /* and the mode of the element type is an int of + * the same size as the byte mode */ + mode = get_type_mode(element_type); + if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8) + return 0; + + if (ent->initializer != NULL) { + return initializer_is_string_const(ent->initializer); + } + + return 0; +} + +static bool entity_is_null(const ir_entity *entity) +{ + ir_initializer_t *initializer = get_entity_initializer(entity); + return initializer == NULL || initializer_is_null(initializer); +} + +static bool is_comdat(const ir_entity *entity) { ir_linkage linkage = get_entity_linkage(entity); + return (linkage & IR_LINKAGE_MERGE) + && (linkage & IR_LINKAGE_GARBAGE_COLLECT); +} + +static be_gas_section_t determine_basic_section(const ir_entity *entity) +{ + ir_linkage linkage; + + if (is_method_entity(entity)) + return GAS_SECTION_TEXT; + + linkage = get_entity_linkage(entity); + if (linkage & IR_LINKAGE_CONSTANT) { + /* mach-o is the only one with a cstring section */ + if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O + && entity_is_string_const(entity)) + return GAS_SECTION_CSTRING; + + return GAS_SECTION_RODATA; + } + if (entity_is_null(entity)) + return GAS_SECTION_BSS; + + return GAS_SECTION_DATA; +} - if (! (linkage & IR_LINKAGE_LOCAL)) { - be_emit_cstring(".globl "); - be_emit_ident(get_entity_ld_ident(entity)); +static be_gas_section_t determine_section(be_gas_decl_env_t *env, + const ir_entity *entity) +{ + ir_type *owner = get_entity_owner(entity); + + if (owner == get_segment_type(IR_SEGMENT_GLOBAL)) { + be_gas_section_t section = determine_basic_section(entity); + if (is_comdat(entity)) + section |= GAS_SECTION_FLAG_COMDAT; + return section; + } else if (env != NULL && owner == env->main_env->pic_symbols_type) { + return GAS_SECTION_PIC_SYMBOLS; + } else if (env != NULL && owner == env->main_env->pic_trampolines_type) { + return GAS_SECTION_PIC_TRAMPOLINES; + } else if (owner == get_segment_type(IR_SEGMENT_CONSTRUCTORS)) { + return GAS_SECTION_CONSTRUCTORS; + } else if (owner == get_segment_type(IR_SEGMENT_DESTRUCTORS)) { + return GAS_SECTION_DESTRUCTORS; + } else if (owner == get_segment_type(IR_SEGMENT_THREAD_LOCAL)) { + be_gas_section_t section = determine_basic_section(entity); + if (is_comdat(entity)) + section |= GAS_SECTION_FLAG_COMDAT; + + return section | GAS_SECTION_FLAG_TLS; + } + + /* the java frontend keeps some functions inside classes */ + if (is_Class_type(owner)) { + return determine_basic_section(entity); + } + + panic("Couldn't determine section for %+F?!?", entity); +} + +static void emit_weak(const ir_entity *entity) +{ + if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) { + be_emit_cstring("\t.weak_reference "); + } else { + be_emit_cstring("\t.weak "); + } + be_gas_emit_entity(entity); + be_emit_char('\n'); + be_emit_write_line(); +} + +static void emit_visibility(const ir_entity *entity) +{ + ir_linkage const linkage = get_entity_linkage(entity); + + if (linkage & IR_LINKAGE_WEAK) { + emit_weak(entity); + /* Note: .weak seems to imply .globl so no need to output .globl */ + } else if (get_entity_visibility(entity) == ir_visibility_external + && entity_has_definition(entity)) { + be_emit_cstring("\t.globl "); + be_gas_emit_entity(entity); be_emit_char('\n'); be_emit_write_line(); } - if (linkage & IR_LINKAGE_WEAK) { - if (! (linkage & IR_LINKAGE_MERGE)) { - panic("Weak symbols only supported in combination with IR_LINKAGE_MERGE on this architecture"); - } - be_emit_cstring(".weak "); - be_emit_ident(get_entity_ld_ident(entity)); + + if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O + && (linkage & IR_LINKAGE_HIDDEN_USER) + && get_entity_ld_name(entity)[0] != '\0') { + be_emit_cstring("\t.no_dead_strip "); + be_gas_emit_entity(entity); be_emit_char('\n'); be_emit_write_line(); } } -void be_gas_emit_function_prolog(ir_entity *entity, unsigned po2alignment) +void be_gas_emit_function_prolog(const ir_entity *entity, unsigned po2alignment, const parameter_dbg_info_t *parameter_infos) { - const char *name = get_entity_ld_name(entity); + be_gas_section_t section; - be_gas_emit_switch_section(GAS_SECTION_TEXT); + be_dwarf_method_before(entity, parameter_infos); + + section = determine_section(NULL, entity); + emit_section(section, entity); /* write the begin line (makes the life easier for scripts parsing the * assembler) */ - be_emit_write_line(); - be_emit_cstring("# -- Begin "); - be_emit_string(name); - be_emit_char('\n'); - be_emit_write_line(); + if (be_options.verbose_asm) { + be_emit_cstring("# -- Begin "); + be_gas_emit_entity(entity); + be_emit_char('\n'); + be_emit_write_line(); + } if (po2alignment > 0) { const char *fill_byte = ""; @@ -165,12 +523,12 @@ void be_gas_emit_function_prolog(ir_entity *entity, unsigned po2alignment) be_emit_irprintf("%u,%s,%u\n", po2alignment, fill_byte, maximum_skip); be_emit_write_line(); } - emit_entity_visibility(entity); + emit_visibility(entity); switch (be_gas_object_file_format) { case OBJECT_FILE_FORMAT_ELF: be_emit_cstring("\t.type\t"); - be_emit_string(name); + be_gas_emit_entity(entity); be_emit_cstring(", "); be_emit_char(be_gas_elf_type_char); be_emit_cstring("function\n"); @@ -178,9 +536,9 @@ void be_gas_emit_function_prolog(ir_entity *entity, unsigned po2alignment) break; case OBJECT_FILE_FORMAT_COFF: be_emit_cstring("\t.def\t"); - be_emit_string(name); + be_gas_emit_entity(entity); be_emit_cstring(";"); - if (get_entity_linkage(entity) & IR_LINKAGE_LOCAL) { + if (get_entity_visibility(entity) == ir_visibility_local) { be_emit_cstring("\t.scl\t3;"); } else { be_emit_cstring("\t.scl\t2;"); @@ -191,43 +549,39 @@ void be_gas_emit_function_prolog(ir_entity *entity, unsigned po2alignment) case OBJECT_FILE_FORMAT_MACH_O: break; } - be_emit_string(name); + be_gas_emit_entity(entity); be_emit_cstring(":\n"); be_emit_write_line(); + + be_dwarf_method_begin(); } -void be_gas_emit_function_epilog(ir_entity *entity) +void be_gas_emit_function_epilog(const ir_entity *entity) { - const char *name = get_entity_ld_name(entity); + be_dwarf_method_end(); if (be_gas_object_file_format == OBJECT_FILE_FORMAT_ELF) { be_emit_cstring("\t.size\t"); - be_emit_string(name); + be_gas_emit_entity(entity); be_emit_cstring(", .-"); - be_emit_string(name); + be_gas_emit_entity(entity); + be_emit_char('\n'); + be_emit_write_line(); + } + + if (be_options.verbose_asm) { + be_emit_cstring("# -- End "); + be_gas_emit_entity(entity); be_emit_char('\n'); be_emit_write_line(); } - be_emit_cstring("# -- End "); - be_emit_string(name); be_emit_char('\n'); be_emit_write_line(); -} - -/** - * An environment containing all needed dumper data. - * Currently we create the file completely in memory first, then - * write it to the disk. This is an artifact from the old C-generating backend - * and even there NOT needed. So we might change it in the future. - */ -typedef struct _be_gas_decl_env { - be_gas_section_t section; - waitq *worklist; /**< A worklist we use to place not yet handled entities on. */ - const be_main_env_t *main_env; -} be_gas_decl_env_t; -/************************************************************************/ + next_block_nr += 199; + next_block_nr -= next_block_nr % 100; +} /** * Output a tarval. @@ -235,7 +589,7 @@ typedef struct _be_gas_decl_env { * @param tv the tarval * @param bytes the width of the tarvals value in bytes */ -static void dump_arith_tarval(tarval *tv, int bytes) +static void emit_arith_tarval(ir_tarval *tv, unsigned bytes) { switch (bytes) { case 1: @@ -243,62 +597,28 @@ static void dump_arith_tarval(tarval *tv, int bytes) return; case 2: - be_emit_irprintf("0x%02x%02x", get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0)); + be_emit_irprintf("0x%02x%02x", + get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0)); return; case 4: be_emit_irprintf("0x%02x%02x%02x%02x", - get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2), get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0)); + get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2), + get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0)); return; case 8: be_emit_irprintf("0x%02x%02x%02x%02x%02x%02x%02x%02x", - get_tarval_sub_bits(tv, 7), get_tarval_sub_bits(tv, 6), get_tarval_sub_bits(tv, 5), get_tarval_sub_bits(tv, 4), - get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2), get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0)); - return; - - case 12: - /* Beware: Mixed endian output! One little endian number emitted as - * three longs. Each long initializer is written in big endian. */ - be_emit_irprintf( - "\t.long\t0x%02x%02x%02x%02x\n" - "\t.long\t0x%02x%02x%02x%02x\n" - "\t.long\t0x%02x%02x%02x%02x", - get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2), - get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0), - get_tarval_sub_bits(tv, 7), get_tarval_sub_bits(tv, 6), - get_tarval_sub_bits(tv, 5), get_tarval_sub_bits(tv, 4), - get_tarval_sub_bits(tv, 11), get_tarval_sub_bits(tv, 10), - get_tarval_sub_bits(tv, 9), get_tarval_sub_bits(tv, 8) - ); - return; - - case 16: - be_emit_irprintf( - "\t.long\t0x%02x%02x%02x%02x0x%02x%02x%02x%02x0x%02x%02x%02x%02x0x%02x%02x%02x%02x", - get_tarval_sub_bits(tv, 15), get_tarval_sub_bits(tv, 16), - get_tarval_sub_bits(tv, 13), get_tarval_sub_bits(tv, 12), - get_tarval_sub_bits(tv, 11), get_tarval_sub_bits(tv, 10), - get_tarval_sub_bits(tv, 9), get_tarval_sub_bits(tv, 8), - get_tarval_sub_bits(tv, 7), get_tarval_sub_bits(tv, 6), - get_tarval_sub_bits(tv, 5), get_tarval_sub_bits(tv, 4), - get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2), - get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0) - ); + get_tarval_sub_bits(tv, 7), get_tarval_sub_bits(tv, 6), + get_tarval_sub_bits(tv, 5), get_tarval_sub_bits(tv, 4), + get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2), + get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0)); return; } panic("Can't dump a tarval with %d bytes", bytes); } -/** - * Return the label prefix for labeled blocks. - */ -const char *be_gas_block_label_prefix(void) -{ - return ".LG"; -} - /** * Return the label prefix for labeled instructions. */ @@ -307,109 +627,37 @@ const char *be_gas_insn_label_prefix(void) return ".LE"; } -void be_gas_emit_entity(ir_entity *entity) -{ - if (entity->type == firm_code_type) { - ir_label_t label = get_entity_label(entity); - be_emit_string(be_gas_block_label_prefix()); - be_emit_irprintf("%lu", label); - } else { - be_emit_ident(get_entity_ld_ident(entity)); - } -} - -/** - * Return the tarval of an atomic initializer. - * - * @param init a node representing the initializer (on the const code irg) - * - * @return the tarval - */ -static tarval *get_atomic_init_tv(ir_node *init) -{ - for (;;) { - ir_mode *mode = get_irn_mode(init); - - switch (get_irn_opcode(init)) { - - case iro_Cast: - init = get_Cast_op(init); - continue; - - case iro_Conv: - init = get_Conv_op(init); - continue; - - case iro_Const: - return get_Const_tarval(init); - - case iro_SymConst: - switch (get_SymConst_kind(init)) { - case symconst_type_size: - return new_tarval_from_long(get_type_size_bytes(get_SymConst_type(init)), mode); - - case symconst_type_align: - return new_tarval_from_long(get_type_alignment_bytes(get_SymConst_type(init)), mode); - - case symconst_ofs_ent: - return new_tarval_from_long(get_entity_offset(get_SymConst_entity(init)), mode); - - case symconst_enum_const: - return get_enumeration_value(get_SymConst_enum(init)); - - default: - return NULL; - } - - default: - return NULL; - } - } -} - /** * Dump an atomic value. * * @param env the gas output environment * @param init a node representing the atomic value (on the const code irg) */ -static void do_dump_atomic_init(be_gas_decl_env_t *env, ir_node *init) +static void emit_init_expression(be_gas_decl_env_t *env, ir_node *init) { ir_mode *mode = get_irn_mode(init); int bytes = get_mode_size_bytes(mode); - tarval *tv; + ir_tarval *tv; ir_entity *ent; init = skip_Id(init); switch (get_irn_opcode(init)) { - case iro_Cast: - do_dump_atomic_init(env, get_Cast_op(init)); - return; - case iro_Conv: - do_dump_atomic_init(env, get_Conv_op(init)); + emit_init_expression(env, get_Conv_op(init)); return; case iro_Const: tv = get_Const_tarval(init); - /* it's a arithmetic value */ - dump_arith_tarval(tv, bytes); + /* it's an arithmetic value */ + emit_arith_tarval(tv, bytes); return; case iro_SymConst: switch (get_SymConst_kind(init)) { - case symconst_addr_name: - be_emit_ident(get_SymConst_name(init)); - break; - case symconst_addr_ent: ent = get_SymConst_entity(init); - if (!is_entity_backend_marked(ent)) { - waitq_put(env->worklist, ent); - set_entity_backend_marked(ent, 1); - } be_gas_emit_entity(ent); break; @@ -428,11 +676,11 @@ static void do_dump_atomic_init(be_gas_decl_env_t *env, ir_node *init) case symconst_enum_const: tv = get_enumeration_value(get_SymConst_enum(init)); - dump_arith_tarval(tv, bytes); + emit_arith_tarval(tv, bytes); break; default: - assert(!"dump_atomic_init(): don't know how to init from this SymConst"); + assert(!"emit_atomic_init(): don't know how to init from this SymConst"); } return; @@ -440,27 +688,27 @@ static void do_dump_atomic_init(be_gas_decl_env_t *env, ir_node *init) if (!mode_is_int(mode) && !mode_is_reference(mode)) { panic("Constant must be int or pointer for '+' to work"); } - do_dump_atomic_init(env, get_Add_left(init)); + emit_init_expression(env, get_Add_left(init)); be_emit_cstring(" + "); - do_dump_atomic_init(env, get_Add_right(init)); + emit_init_expression(env, get_Add_right(init)); return; case iro_Sub: if (!mode_is_int(mode) && !mode_is_reference(mode)) { panic("Constant must be int or pointer for '-' to work"); } - do_dump_atomic_init(env, get_Sub_left(init)); + emit_init_expression(env, get_Sub_left(init)); be_emit_cstring(" - "); - do_dump_atomic_init(env, get_Sub_right(init)); + emit_init_expression(env, get_Sub_right(init)); return; case iro_Mul: if (!mode_is_int(mode) && !mode_is_reference(mode)) { panic("Constant must be int or pointer for '*' to work"); } - do_dump_atomic_init(env, get_Mul_left(init)); + emit_init_expression(env, get_Mul_left(init)); be_emit_cstring(" * "); - do_dump_atomic_init(env, get_Mul_right(init)); + emit_init_expression(env, get_Mul_right(init)); return; case iro_Unknown: @@ -468,7 +716,7 @@ static void do_dump_atomic_init(be_gas_decl_env_t *env, ir_node *init) return; default: - panic("dump_atomic_init(): unsupported IR-node %+F", init); + panic("unsupported IR-node %+F", init); } } @@ -477,270 +725,83 @@ static void do_dump_atomic_init(be_gas_decl_env_t *env, ir_node *init) * * @param size the size in bytes */ -static void dump_size_type(size_t size) { +static void emit_size_type(size_t size) +{ switch (size) { - case 1: - be_emit_cstring("\t.byte\t"); - break; - - case 2: - be_emit_cstring("\t.short\t"); - break; - - case 4: - be_emit_cstring("\t.long\t"); - break; - - case 8: - be_emit_cstring("\t.quad\t"); - break; - - case 10: - case 12: - /* handled in arith */ - break; - - case 16: - be_emit_cstring("\t.octa\t"); - break; + case 1: be_emit_cstring("\t.byte\t"); break; + case 2: be_emit_cstring("\t.short\t"); break; + case 4: be_emit_cstring("\t.long\t"); break; + case 8: be_emit_cstring("\t.quad\t"); break; default: panic("Try to dump a type with %u bytes", (unsigned)size); } } -/** - * Emit an atomic value. - * - * @param env the gas output environment - * @param init a node representing the atomic value (on the const code irg) - */ -static void dump_atomic_init(be_gas_decl_env_t *env, ir_node *init) -{ - ir_mode *mode = get_irn_mode(init); - int bytes = get_mode_size_bytes(mode); - - dump_size_type(bytes); - do_dump_atomic_init(env, init); - be_emit_char('\n'); - be_emit_write_line(); -} - -/************************************************************************/ -/* Routines to dump global variables */ -/************************************************************************/ - -static int initializer_is_string_const(const ir_initializer_t *initializer) +static void emit_string_char(int c) { - size_t i, len; - int found_printable = 0; - - if (initializer->kind != IR_INITIALIZER_COMPOUND) - return 0; - - len = initializer->compound.n_initializers; - if (len < 1) - return 0; - for (i = 0; i < len; ++i) { - int c; - tarval *tv; - ir_mode *mode; - ir_initializer_t *sub_initializer - = initializer->compound.initializers[i]; - - if (sub_initializer->kind != IR_INITIALIZER_TARVAL) - return 0; - - tv = sub_initializer->tarval.value; - mode = get_tarval_mode(tv); - - if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8) - return 0; - - c = get_tarval_long(tv); - if (isgraph(c) || isspace(c)) - found_printable = 1; - else if (c != 0) - return 0; - - if (i == len - 1 && c != '\0') - return 0; + switch (c) { + case '"' : be_emit_cstring("\\\""); break; + case '\n': be_emit_cstring("\\n"); break; + case '\r': be_emit_cstring("\\r"); break; + case '\t': be_emit_cstring("\\t"); break; + case '\\': be_emit_cstring("\\\\"); break; + default : + if (isprint(c)) + be_emit_char(c); + else + be_emit_irprintf("\\%03o", c); + break; } - - return found_printable; } -/** - * Determine if an entity is a string constant - * @param ent The entity - * @return 1 if it is a string constant, 0 otherwise - */ -static int ent_is_string_const(const ir_entity *ent) +static size_t emit_string_initializer(const ir_initializer_t *initializer) { - ir_type *type, *element_type; - ir_mode *mode; - int i, c, n; - - type = get_entity_type(ent); - - /* if it's an array */ - if (!is_Array_type(type)) - return 0; + be_emit_cstring("\t.asciz \""); - element_type = get_array_element_type(type); - - /* and the array's element type is primitive */ - if (!is_Primitive_type(element_type)) - return 0; - - /* and the mode of the element type is an int of - * the same size as the byte mode */ - mode = get_type_mode(element_type); - if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8) - return 0; + size_t len = initializer->compound.n_initializers; + for (size_t i = 0; i < len-1; ++i) { + const ir_initializer_t *sub_initializer + = get_initializer_compound_value(initializer, i); - if (ent->initializer != NULL) { - return initializer_is_string_const(ent->initializer); - } else if (entity_has_compound_ent_values(ent)) { - int found_printable = 0; - /* if it contains only printable chars and a 0 at the end */ - n = get_compound_ent_n_values(ent); - for (i = 0; i < n; ++i) { - ir_node *irn = get_compound_ent_value(ent, i); - if (! is_Const(irn)) - return 0; - - c = (int) get_tarval_long(get_Const_tarval(irn)); - - if (isgraph(c) || isspace(c)) - found_printable = 1; - else if (c != 0) - return 0; - - if (i == n - 1 && c != '\0') - return 0; - } - return found_printable; - } - - return 0; -} - -/** - * Dump a string constant. - * No checks are made!! - * - * @param ent The entity to dump. - */ -static void dump_string_cst(const ir_entity *ent) -{ - int i, len; - int output_len; - ir_type *type; - int type_size; - int remaining_space; - - len = get_compound_ent_n_values(ent); - output_len = len; - if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) { - be_emit_cstring("\t.ascii \""); - } else { - be_emit_cstring("\t.string \""); - output_len -= 1; - } - - for (i = 0; i < output_len; ++i) { - ir_node *irn; - int c; - - irn = get_compound_ent_value(ent, i); - c = (int) get_tarval_long(get_Const_tarval(irn)); - - switch (c) { - case '"' : be_emit_cstring("\\\""); break; - case '\n': be_emit_cstring("\\n"); break; - case '\r': be_emit_cstring("\\r"); break; - case '\t': be_emit_cstring("\\t"); break; - case '\\': be_emit_cstring("\\\\"); break; - default : - if (isprint(c)) - be_emit_char(c); - else - be_emit_irprintf("\\%o", c); - break; - } + ir_tarval *tv = get_initializer_tarval(sub_initializer); + int c = get_tarval_long(tv); + emit_string_char(c); } be_emit_cstring("\"\n"); be_emit_write_line(); - type = get_entity_type(ent); - type_size = get_type_size_bytes(type); - remaining_space = type_size - len; - assert(remaining_space >= 0); - if (remaining_space > 0) { - be_emit_irprintf("\t.space\t%d\n", remaining_space); - } + return initializer->compound.n_initializers; } -static void dump_string_initializer(const ir_initializer_t *initializer) +void be_gas_emit_cstring(const char *string) { - size_t i, len; - - len = initializer->compound.n_initializers; - if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) { - be_emit_cstring("\t.ascii \""); - } else { - be_emit_cstring("\t.string \""); - len -= 1; - } - - for (i = 0; i < len; ++i) { - const ir_initializer_t *sub_initializer - = get_initializer_compound_value(initializer, i); - - tarval *tv = get_initializer_tarval_value(sub_initializer); - int c = get_tarval_long(tv); - - switch (c) { - case '"' : be_emit_cstring("\\\""); break; - case '\n': be_emit_cstring("\\n"); break; - case '\r': be_emit_cstring("\\r"); break; - case '\t': be_emit_cstring("\\t"); break; - case '\\': be_emit_cstring("\\\\"); break; - default : - if (isprint(c)) - be_emit_char(c); - else - be_emit_irprintf("\\%o", c); - break; - } + be_emit_cstring("\t.asciz \""); + for (const char *c = string; *c != '\0'; ++c) { + emit_string_char(*c); } be_emit_cstring("\"\n"); be_emit_write_line(); } -enum normal_or_bitfield_kind { +typedef enum normal_or_bitfield_kind { NORMAL = 0, TARVAL, + STRING, BITFIELD -}; +} normal_or_bitfield_kind; typedef struct { - enum normal_or_bitfield_kind kind; + normal_or_bitfield_kind kind; + ir_type *type; union { - ir_node *value; - tarval *tarval; - unsigned char bf_val; + ir_node *value; + ir_tarval *tarval; + unsigned char bf_val; + const ir_initializer_t *string; } v; } normal_or_bitfield; -static int is_type_variable_size(ir_type *type) -{ - (void) type; - /* TODO */ - return 0; -} - static size_t get_initializer_size(const ir_initializer_t *initializer, ir_type *type) { @@ -752,28 +813,34 @@ static size_t get_initializer_size(const ir_initializer_t *initializer, case IR_INITIALIZER_NULL: return get_type_size_bytes(type); case IR_INITIALIZER_COMPOUND: - if (!is_type_variable_size(type)) { - return get_type_size_bytes(type); + if (is_Array_type(type)) { + if (is_array_variable_size(type)) { + ir_type *element_type = get_array_element_type(type); + unsigned element_size = get_type_size_bytes(element_type); + unsigned element_align + = get_type_alignment_bytes(element_type); + unsigned misalign = element_size % element_align; + size_t n_inits + = get_initializer_compound_n_entries(initializer); + element_size += element_align - misalign; + return n_inits * element_size; + } else { + return get_type_size_bytes(type); + } } else { - unsigned n_entries - = get_initializer_compound_n_entries(initializer); - unsigned i; - unsigned initializer_size = get_type_size_bytes(type); - for (i = 0; i < n_entries; ++i) { - ir_entity *entity = get_compound_member(type, i); - ir_type *type = get_entity_type(entity); - - const ir_initializer_t *sub_initializer - = get_initializer_compound_value(initializer, i); - - unsigned offset = get_entity_offset(entity); - unsigned size = get_initializer_size(sub_initializer, type); - - if (offset + size > initializer_size) { - initializer_size = offset + size; - } + assert(is_compound_type(type)); + size_t size = get_type_size_bytes(type); + if (is_compound_variable_size(type)) { + /* last initializer has to be an array of variable size */ + size_t l = get_initializer_compound_n_entries(initializer)-1; + const ir_initializer_t *last + = get_initializer_compound_value(initializer, l); + const ir_entity *last_ent = get_compound_member(type, l); + ir_type *last_type = get_entity_type(last_ent); + assert(is_array_variable_size(last_type)); + size += get_initializer_size(last, last_type); } - return initializer_size; + return size; } } @@ -785,15 +852,16 @@ static normal_or_bitfield *glob_vals; static size_t max_vals; #endif -static void dump_bitfield(normal_or_bitfield *vals, size_t offset_bits, +static void emit_bitfield(normal_or_bitfield *vals, size_t offset_bits, const ir_initializer_t *initializer, ir_type *type) { - unsigned char last_bits = 0; - ir_mode *mode = get_type_mode(type); - tarval *tv = NULL; - unsigned char curr_bits; - int value_len; - int j; + static const size_t BITS_PER_BYTE = 8; + ir_mode *mode = get_type_mode(type); + ir_tarval *tv = NULL; + int value_len; + size_t bit_offset; + size_t end; + bool big_endian = be_get_backend_param()->byte_order_big_endian; switch (get_initializer_kind(initializer)) { case IR_INITIALIZER_NULL: @@ -817,30 +885,56 @@ static void dump_bitfield(normal_or_bitfield *vals, size_t offset_bits, } tv = tarval_convert_to(tv, get_type_mode(type)); - /* normalize offset */ - vals += offset_bits >> 3; - offset_bits &= 7; - value_len = get_mode_size_bits(mode); - - /* combine bits with existing bits */ - for (j = 0; value_len + (int) offset_bits > 0; ++j) { - assert((size_t) (vals - glob_vals) + j < max_vals); - assert(vals[j].kind == BITFIELD || - (vals[j].kind == NORMAL && vals[j].v.value == NULL)); - vals[j].kind = BITFIELD; - curr_bits = get_tarval_sub_bits(tv, j); - vals[j].v.bf_val - |= (last_bits >> (8 - offset_bits)) | (curr_bits << offset_bits); - value_len -= 8; - last_bits = curr_bits; + value_len = get_type_size_bytes(get_primitive_base_type(type)); + bit_offset = 0; + end = get_mode_size_bits(mode); + while (bit_offset < end) { + size_t src_offset = bit_offset / BITS_PER_BYTE; + size_t src_offset_bits = bit_offset % BITS_PER_BYTE; + size_t dst_offset = (bit_offset+offset_bits) / BITS_PER_BYTE; + size_t dst_offset_bits = (bit_offset+offset_bits) % BITS_PER_BYTE; + size_t src_bits_len = end-bit_offset; + size_t dst_bits_len = BITS_PER_BYTE-dst_offset_bits; + unsigned char curr_bits; + normal_or_bitfield *val; + if (src_bits_len > dst_bits_len) + src_bits_len = dst_bits_len; + + if (big_endian) { + val = &vals[value_len - dst_offset - 1]; + } else { + val = &vals[dst_offset]; + } + + assert((val-glob_vals) < (ptrdiff_t) max_vals); + assert(val->kind == BITFIELD || + (val->kind == NORMAL && val->v.value == NULL)); + val->kind = BITFIELD; + curr_bits = get_tarval_sub_bits(tv, src_offset); + curr_bits = curr_bits >> src_offset_bits; + if (src_offset_bits + src_bits_len > 8) { + unsigned next_bits = get_tarval_sub_bits(tv, src_offset+1); + curr_bits |= next_bits << (8 - src_offset_bits); + } + curr_bits &= (1 << src_bits_len) - 1; + val->v.bf_val |= curr_bits << dst_offset_bits; + + bit_offset += dst_bits_len; } } -static void dump_ir_initializer(normal_or_bitfield *vals, +static void emit_ir_initializer(normal_or_bitfield *vals, const ir_initializer_t *initializer, ir_type *type) { - assert((size_t) (vals - glob_vals) < max_vals); + assert((size_t) (vals - glob_vals) <= max_vals); + + if (initializer_is_string_const(initializer)) { + assert(vals->kind != BITFIELD); + vals->kind = STRING; + vals->v.string = initializer; + return; + } switch (get_initializer_kind(initializer)) { case IR_INITIALIZER_NULL: @@ -850,10 +944,12 @@ static void dump_ir_initializer(normal_or_bitfield *vals, assert(vals->kind != BITFIELD); vals->kind = TARVAL; + vals->type = type; vals->v.tarval = get_initializer_tarval_value(initializer); assert(get_type_mode(type) == get_tarval_mode(vals->v.tarval)); for (i = 1; i < get_type_size_bytes(type); ++i) { vals[i].kind = NORMAL; + vals[i].type = NULL; vals[i].v.value = NULL; } return; @@ -863,9 +959,11 @@ static void dump_ir_initializer(normal_or_bitfield *vals, assert(vals->kind != BITFIELD); vals->kind = NORMAL; + vals->type = type; vals->v.value = get_initializer_const_value(initializer); for (i = 1; i < get_type_size_bytes(type); ++i) { vals[i].kind = NORMAL; + vals[i].type = NULL; vals[i].v.value = NULL; } return; @@ -887,7 +985,7 @@ static void dump_ir_initializer(normal_or_bitfield *vals, ir_initializer_t *sub_initializer = get_initializer_compound_value(initializer, i); - dump_ir_initializer(vals, sub_initializer, element_type); + emit_ir_initializer(vals, sub_initializer, element_type); vals += skip; } @@ -909,18 +1007,18 @@ static void dump_ir_initializer(normal_or_bitfield *vals, if (mode != NULL) { size_t offset_bits = get_entity_offset_bits_remainder(member); - size_t value_len = get_mode_size_bits(mode); - if (offset_bits != 0 || - (value_len != 8 && value_len != 16 && value_len != 32 - && value_len != 64)) { - dump_bitfield(&vals[offset], offset_bits, + if (is_Primitive_type(subtype) + && get_primitive_base_type(subtype) != NULL) { + emit_bitfield(&vals[offset], offset_bits, sub_initializer, subtype); continue; + } else { + assert(offset_bits == 0); } } - dump_ir_initializer(&vals[offset], sub_initializer, subtype); + emit_ir_initializer(&vals[offset], sub_initializer, subtype); } } @@ -930,7 +1028,98 @@ static void dump_ir_initializer(normal_or_bitfield *vals, panic("invalid ir_initializer kind found"); } -static void dump_initializer(be_gas_decl_env_t *env, const ir_entity *entity) +static void emit_tarval_data(ir_type *type, ir_tarval *tv) +{ + size_t size = get_type_size_bytes(type); + if (size == 12) { + /* this should be an x86 extended float */ + assert(be_get_backend_param()->byte_order_big_endian == 0); + + /* Beware: Mixed endian output! One little endian number emitted as + * three longs. Each long initializer is written in big endian. */ + be_emit_irprintf( + "\t.long\t0x%02x%02x%02x%02x\n" + "\t.long\t0x%02x%02x%02x%02x\n" + "\t.long\t0x%02x%02x%02x%02x\n", + get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2), + get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0), + get_tarval_sub_bits(tv, 7), get_tarval_sub_bits(tv, 6), + get_tarval_sub_bits(tv, 5), get_tarval_sub_bits(tv, 4), + get_tarval_sub_bits(tv, 11), get_tarval_sub_bits(tv, 10), + get_tarval_sub_bits(tv, 9), get_tarval_sub_bits(tv, 8) + ); + be_emit_write_line(); + } else if (size == 16) { + if (be_get_backend_param()->byte_order_big_endian) { + be_emit_irprintf( + "\t.long\t0x%02x%02x%02x%02x\n" + "\t.long\t0x%02x%02x%02x%02x\n" + "\t.long\t0x%02x%02x%02x%02x\n" + "\t.long\t0x%02x%02x%02x%02x\n", + get_tarval_sub_bits(tv, 15), get_tarval_sub_bits(tv, 14), + get_tarval_sub_bits(tv, 13), get_tarval_sub_bits(tv, 12), + get_tarval_sub_bits(tv, 11), get_tarval_sub_bits(tv, 10), + get_tarval_sub_bits(tv, 9), get_tarval_sub_bits(tv, 8), + get_tarval_sub_bits(tv, 7), get_tarval_sub_bits(tv, 6), + get_tarval_sub_bits(tv, 5), get_tarval_sub_bits(tv, 4), + get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2), + get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0) + ); + } else { + /* Beware: Mixed endian output! One little endian number emitted as + * three longs. Each long initializer is written in big endian. */ + be_emit_irprintf( + "\t.long\t0x%02x%02x%02x%02x\n" + "\t.long\t0x%02x%02x%02x%02x\n" + "\t.long\t0x%02x%02x%02x%02x\n" + "\t.long\t0x%02x%02x%02x%02x\n", + get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2), + get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0), + get_tarval_sub_bits(tv, 7), get_tarval_sub_bits(tv, 6), + get_tarval_sub_bits(tv, 5), get_tarval_sub_bits(tv, 4), + get_tarval_sub_bits(tv, 11), get_tarval_sub_bits(tv, 10), + get_tarval_sub_bits(tv, 9), get_tarval_sub_bits(tv, 8), + get_tarval_sub_bits(tv, 15), get_tarval_sub_bits(tv, 14), + get_tarval_sub_bits(tv, 13), get_tarval_sub_bits(tv, 12) + ); + } + be_emit_write_line(); + return; + } else { + /* default case */ + emit_size_type(size); + emit_arith_tarval(tv, size); + be_emit_char('\n'); + be_emit_write_line(); + } +} + +/** + * Emit an atomic value. + * + * @param env the gas output environment + * @param init a node representing the atomic value (on the const code irg) + */ +static void emit_node_data(be_gas_decl_env_t *env, ir_node *init, ir_type *type) +{ + size_t size = get_type_size_bytes(type); + if (size == 12 || size == 16) { + ir_tarval *tv; + if (!is_Const(init)) { + panic("12/16byte initializers only support Const nodes yet"); + } + tv = get_Const_tarval(init); + emit_tarval_data(type, tv); + return; + } + + emit_size_type(size); + emit_init_expression(env, init); + be_emit_char('\n'); + be_emit_write_line(); +} + +static void emit_initializer(be_gas_decl_env_t *env, const ir_entity *entity) { const ir_initializer_t *initializer = entity->initializer; ir_type *type; @@ -939,7 +1128,7 @@ static void dump_initializer(be_gas_decl_env_t *env, const ir_entity *entity) size_t k; if (initializer_is_string_const(initializer)) { - dump_string_initializer(initializer); + emit_string_initializer(initializer); return; } @@ -960,34 +1149,36 @@ static void dump_initializer(be_gas_decl_env_t *env, const ir_entity *entity) max_vals = size; #endif - dump_ir_initializer(vals, initializer, type); + emit_ir_initializer(vals, initializer, type); /* now write values sorted */ for (k = 0; k < size; ) { - int space = 0; - int elem_size = 1; - if (vals[k].kind == NORMAL) { + int space = 0; + normal_or_bitfield_kind kind = vals[k].kind; + int elem_size; + switch (kind) { + case NORMAL: if (vals[k].v.value != NULL) { - dump_atomic_init(env, vals[k].v.value); - elem_size = get_mode_size_bytes(get_irn_mode(vals[k].v.value)); - } else { - elem_size = 0; - } - } else if (vals[k].kind == TARVAL) { - tarval *tv = vals[k].v.tarval; - size_t size = get_mode_size_bytes(get_tarval_mode(tv)); - - assert(tv != NULL); - - elem_size = size; - dump_size_type(size); - dump_arith_tarval(tv, size); - be_emit_char('\n'); - be_emit_write_line(); - } else { - assert(vals[k].kind == BITFIELD); + emit_node_data(env, vals[k].v.value, vals[k].type); + elem_size = get_type_size_bytes(vals[k].type); + } else { + elem_size = 0; + } + break; + case TARVAL: + emit_tarval_data(vals[k].type, vals[k].v.tarval); + elem_size = get_type_size_bytes(vals[k].type); + break; + case STRING: + elem_size = emit_string_initializer(vals[k].v.string); + break; + case BITFIELD: be_emit_irprintf("\t.byte\t%d\n", vals[k].v.bf_val); be_emit_write_line(); + elem_size = 1; + break; + default: + panic("internal compiler error (invalid normal_or_bitfield_kind"); } k += elem_size; @@ -998,118 +1189,7 @@ static void dump_initializer(be_gas_decl_env_t *env, const ir_entity *entity) /* a gap */ if (space > 0) { - be_emit_irprintf("\t.space\t%d\n", space); - be_emit_write_line(); - } - } - xfree(vals); -} - -static void dump_compound_graph_init(be_gas_decl_env_t *env, - const ir_entity *ent) -{ - normal_or_bitfield *vals; - int i, j, n; - unsigned k, last_ofs; - - if (ent_is_string_const(ent)) { - dump_string_cst(ent); - return; - } - - n = get_compound_ent_n_values(ent); - - /* Find the initializer size. Sorrily gcc support a nasty feature: - The last field of a compound may be a flexible array. This allows - initializers bigger than the type size. */ - last_ofs = get_type_size_bytes(get_entity_type(ent)); - for (i = 0; i < n; ++i) { - unsigned offset = get_compound_ent_value_offset_bytes(ent, i); - unsigned bits_remainder = get_compound_ent_value_offset_bit_remainder(ent, i); - ir_node *value = get_compound_ent_value(ent, i); - unsigned value_len = get_mode_size_bits(get_irn_mode(value)); - - offset += (value_len + bits_remainder + 7) >> 3; - - if (offset > last_ofs) { - last_ofs = offset; - } - } - - /* - * In the worst case, every initializer allocates one byte. - * Moreover, initializer might be big, do not allocate on stack. - */ - vals = XMALLOCNZ(normal_or_bitfield, last_ofs); - - /* collect the values and store them at the offsets */ - for (i = 0; i < n; ++i) { - unsigned offset = get_compound_ent_value_offset_bytes(ent, i); - int offset_bits = get_compound_ent_value_offset_bit_remainder(ent, i); - ir_node *value = get_compound_ent_value(ent, i); - int value_len = get_mode_size_bits(get_irn_mode(value)); - - assert(offset_bits >= 0); - - if (offset_bits != 0 || - (value_len != 8 && value_len != 16 && value_len != 32 && value_len != 64)) { - tarval *tv = get_atomic_init_tv(value); - unsigned char curr_bits, last_bits = 0; - if (tv == NULL) { - panic("Couldn't get numeric value for bitfield initializer '%s'", - get_entity_ld_name(ent)); - } - /* normalize offset */ - offset += offset_bits >> 3; - offset_bits &= 7; - - for (j = 0; value_len + offset_bits > 0; ++j) { - assert(offset + j < last_ofs); - assert(vals[offset + j].kind == BITFIELD || vals[offset + j].v.value == NULL); - vals[offset + j].kind = BITFIELD; - curr_bits = get_tarval_sub_bits(tv, j); - vals[offset + j].v.bf_val |= (last_bits >> (8 - offset_bits)) | (curr_bits << offset_bits); - value_len -= 8; - last_bits = curr_bits; - } - } else { - int i; - - assert(offset < last_ofs); - assert(vals[offset].kind == NORMAL); - for (i = 1; i < value_len / 8; ++i) { - assert(vals[offset + i].v.value == NULL); - } - vals[offset].v.value = value; - } - } - - /* now write them sorted */ - for (k = 0; k < last_ofs; ) { - int space = 0, skip = 0; - if (vals[k].kind == NORMAL) { - if (vals[k].v.value != NULL) { - dump_atomic_init(env, vals[k].v.value); - skip = get_mode_size_bytes(get_irn_mode(vals[k].v.value)) - 1; - } else { - space = 1; - } - } else { - assert(vals[k].kind == BITFIELD); - be_emit_irprintf("\t.byte\t%d\n", vals[k].v.bf_val); - } - - ++k; - while (k < last_ofs && vals[k].kind == NORMAL && vals[k].v.value == NULL) { - ++space; - ++k; - } - space -= skip; - assert(space >= 0); - - /* a gap */ - if (space > 0) { - be_emit_irprintf("\t.space\t%d\n", space); + be_emit_irprintf("\t.space\t%d, 0\n", space); be_emit_write_line(); } } @@ -1132,133 +1212,258 @@ static unsigned get_effective_entity_alignment(const ir_entity *entity) return alignment; } -static be_gas_section_t determine_section(be_gas_decl_env_t *env, - const ir_entity *entity) +static void emit_common(const ir_entity *entity) { - ir_type *owner = get_entity_owner(entity); - - if (owner == get_segment_type(IR_SEGMENT_GLOBAL)) { - ir_linkage linkage = get_entity_linkage(entity); - if (linkage & IR_LINKAGE_CONSTANT) { - /* mach-o is the only one with a cstring section */ - if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O - && ent_is_string_const(entity)) - return GAS_SECTION_CSTRING; - - return GAS_SECTION_RODATA; - } - if (!entity_has_definition(entity)) - return GAS_SECTION_BSS; - - return GAS_SECTION_DATA; + unsigned size = get_type_size_bytes(get_entity_type(entity)); + unsigned alignment = get_effective_entity_alignment(entity); - } else if (owner == env->main_env->pic_symbols_type) { - return GAS_SECTION_PIC_SYMBOLS; - } else if (owner == env->main_env->pic_trampolines_type) { - return GAS_SECTION_PIC_TRAMPOLINES; - } else if (owner == get_segment_type(IR_SEGMENT_CONSTRUCTORS)) { - return GAS_SECTION_CONSTRUCTORS; - } else if (owner == get_segment_type(IR_SEGMENT_DESTRUCTORS)) { - return GAS_SECTION_DESTRUCTORS; - } else if (owner == get_segment_type(IR_SEGMENT_THREAD_LOCAL)) { - return GAS_SECTION_TLS; + if (get_entity_linkage(entity) & IR_LINKAGE_WEAK) { + emit_weak(entity); } - panic("Couldn't determine section for %+F?!?", entity); + switch (be_gas_object_file_format) { + case OBJECT_FILE_FORMAT_MACH_O: + be_emit_cstring("\t.comm "); + be_gas_emit_entity(entity); + be_emit_irprintf(",%u,%u\n", size, log2_floor(alignment)); + be_emit_write_line(); + return; + case OBJECT_FILE_FORMAT_ELF: + be_emit_cstring("\t.comm "); + be_gas_emit_entity(entity); + be_emit_irprintf(",%u,%u\n", size, alignment); + be_emit_write_line(); + return; + case OBJECT_FILE_FORMAT_COFF: + be_emit_cstring("\t.comm "); + be_gas_emit_entity(entity); + be_emit_irprintf(",%u # %u\n", size, alignment); + be_emit_write_line(); + return; + } + panic("invalid object file format"); } -static void emit_common(const ir_entity *ent) +static void emit_local_common(const ir_entity *entity) { - const char *name = get_entity_ld_name(ent); - unsigned size = get_type_size_bytes(get_entity_type(ent)); - unsigned alignment = get_effective_entity_alignment(ent); + unsigned size = get_type_size_bytes(get_entity_type(entity)); + unsigned alignment = get_effective_entity_alignment(entity); + + if (get_entity_linkage(entity) & IR_LINKAGE_WEAK) { + emit_weak(entity); + } switch (be_gas_object_file_format) { case OBJECT_FILE_FORMAT_MACH_O: - be_emit_irprintf("\t.comm %s,%u,%u\n", name, size, - log2_floor(alignment)); + be_emit_cstring("\t.lcomm "); + be_gas_emit_entity(entity); + be_emit_irprintf(",%u,%u\n", size, log2_floor(alignment)); be_emit_write_line(); return; case OBJECT_FILE_FORMAT_ELF: - be_emit_irprintf("\t.comm %s,%u,%u\n", name, size, alignment); + be_emit_cstring("\t.local "); + be_gas_emit_entity(entity); + be_emit_cstring("\n"); + be_emit_write_line(); + be_emit_cstring("\t.comm "); + be_gas_emit_entity(entity); + be_emit_irprintf(",%u,%u\n", size, alignment); be_emit_write_line(); return; case OBJECT_FILE_FORMAT_COFF: - be_emit_irprintf("\t.comm %s,%u # %u\n", name, size, alignment); + be_emit_cstring("\t.lcomm "); + be_gas_emit_entity(entity); + be_emit_irprintf(",%u # %u\n", size, alignment); be_emit_write_line(); return; } panic("invalid object file format"); } +static void emit_indirect_symbol(const ir_entity *entity, be_gas_section_t section) +{ + /* we can only do PIC code on macho so far */ + assert(be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O); + + be_gas_emit_entity(entity); + be_emit_cstring(":\n"); + be_emit_write_line(); + be_emit_irprintf("\t.indirect_symbol %I\n", get_entity_ident(entity)); + be_emit_write_line(); + if (section == GAS_SECTION_PIC_TRAMPOLINES) { + be_emit_cstring("\thlt ; hlt ; hlt ; hlt ; hlt\n"); + be_emit_write_line(); + } else { + assert(section == GAS_SECTION_PIC_SYMBOLS); + be_emit_cstring("\t.long 0\n"); + be_emit_write_line(); + } +} + +char const *be_gas_get_private_prefix(void) +{ + return be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O ? "L" : ".L"; +} + +void be_gas_emit_entity(const ir_entity *entity) +{ + if (entity->type == get_code_type()) { + ir_label_t label = get_entity_label(entity); + be_emit_irprintf("%s_%lu", be_gas_get_private_prefix(), label); + return; + } + + if (get_entity_visibility(entity) == ir_visibility_private) { + be_emit_string(be_gas_get_private_prefix()); + } + be_emit_irprintf("%I", get_entity_ld_ident(entity)); +} + +void be_gas_emit_block_name(const ir_node *block) +{ + ir_entity *entity = get_Block_entity(block); + if (entity != NULL) { + be_gas_emit_entity(entity); + } else { + void *nr_val = pmap_get(void, block_numbers, block); + int nr; + if (nr_val == NULL) { + nr = next_block_nr++; + pmap_insert(block_numbers, block, INT_TO_PTR(nr+1)); + } else { + nr = PTR_TO_INT(nr_val)-1; + } + be_emit_irprintf("%s%d", be_gas_get_private_prefix(), nr); + } +} + +void be_gas_begin_block(const ir_node *block, bool needs_label) +{ + if (needs_label) { + be_gas_emit_block_name(block); + be_emit_char(':'); + } else { + if (!be_options.verbose_asm) + return; + be_emit_cstring("/*"); + be_gas_emit_block_name(block); + be_emit_cstring(":*/"); + } + + if (be_options.verbose_asm) { + be_emit_pad_comment(); + be_emit_irprintf("/* %+F preds:", block); + + int arity = get_irn_arity(block); + if (arity == 0) { + be_emit_cstring(" none"); + } else { + int i; + for (i = 0; i < arity; ++i) { + ir_node *predblock = get_Block_cfgpred_block(block, i); + be_emit_char(' '); + be_gas_emit_block_name(predblock); + } + } + be_emit_irprintf(", freq: %.3f */", get_block_execfreq(block)); + } + be_emit_char('\n'); + be_emit_write_line(); +} + /** * Dump a global entity. * * @param env the gas output environment * @param ent the entity to be dumped */ -static void dump_global(be_gas_decl_env_t *env, const ir_entity *ent) +static void emit_global(be_gas_decl_env_t *env, const ir_entity *entity) { - ir_type *type = get_entity_type(ent); - ident *ld_ident = get_entity_ld_ident(ent); - unsigned alignment = get_effective_entity_alignment(ent); - be_gas_section_t section = determine_section(env, ent); - ir_linkage linkage = get_entity_linkage(ent); - - /* we already emitted all methods. Except for the trampolines which - * the assembler/linker generates */ + ir_type *type = get_entity_type(entity); + ident *ld_ident = get_entity_ld_ident(entity); + unsigned alignment = get_effective_entity_alignment(entity); + be_gas_section_t section = determine_section(env, entity); + ir_visibility visibility = get_entity_visibility(entity); + ir_linkage linkage = get_entity_linkage(entity); + + /* Block labels are already emitted in the code. */ + if (type == get_code_type()) + return; + + /* we already emitted all methods with graphs in other functions like + * be_gas_emit_function_prolog(). All others don't need to be emitted. + */ if (is_Method_type(type) && section != GAS_SECTION_PIC_TRAMPOLINES) { return; } - /* block labels are already emittet in the code */ - if (type == firm_code_type) - return; - be_dbg_variable(ent); + be_dwarf_variable(entity); + + if (section == GAS_SECTION_BSS) { + switch (visibility) { + case ir_visibility_local: + case ir_visibility_private: + emit_local_common(entity); + return; + case ir_visibility_external: + if (linkage & IR_LINKAGE_MERGE) { + emit_common(entity); + return; + } + break; + } + } - /* nothing to do for externally defined values */ - if (linkage & IR_LINKAGE_EXTERN) - return; + emit_visibility(entity); if (!is_po2(alignment)) panic("alignment not a power of 2"); - if (section == GAS_SECTION_BSS && - (get_entity_linkage(ent) & IR_LINKAGE_MERGE)) { - emit_common(ent); + emit_section(section, entity); + + if (section == GAS_SECTION_PIC_TRAMPOLINES + || section == GAS_SECTION_PIC_SYMBOLS) { + emit_indirect_symbol(entity, section); return; } - be_gas_emit_switch_section(section); + /* nothing left to do without an initializer */ + if (!entity_has_definition(entity)) + return; /* alignment */ if (alignment > 1) { emit_align(alignment); } - emit_entity_visibility(ent); if (be_gas_object_file_format == OBJECT_FILE_FORMAT_ELF - && be_gas_emit_types) { + && be_gas_emit_types + && visibility != ir_visibility_private) { be_emit_cstring("\t.type\t"); - be_emit_ident(ld_ident); + be_gas_emit_entity(entity); be_emit_cstring(", "); be_emit_char(be_gas_elf_type_char); - be_emit_cstring("object\n\t.size\t"); - be_emit_ident(ld_ident); + be_emit_cstring("object\n\t.size\t");\ + be_gas_emit_entity(entity); be_emit_irprintf(", %u\n", get_type_size_bytes(type)); } - be_emit_ident(ld_ident); - be_emit_cstring(":\n"); - be_emit_write_line(); - if (ent->initializer != NULL) { - dump_initializer(env, ent); - } else if(entity_has_compound_ent_values(ent)) { - dump_compound_graph_init(env, ent); - } else { - /* uninitialized */ - be_emit_irprintf("\t.space %u\n", get_type_size_bytes(type)); + if (get_id_str(ld_ident)[0] != '\0') { + be_gas_emit_entity(entity); + be_emit_cstring(":\n"); be_emit_write_line(); } + + if (entity_is_null(entity)) { + /* we should use .space for stuff in the bss segment */ + unsigned size = get_type_size_bytes(type); + if (size > 0) { + be_emit_irprintf("\t.space %u, 0\n", get_type_size_bytes(type)); + be_emit_write_line(); + } + } else { + assert(entity->initializer != NULL); + emit_initializer(env, entity); + } } /** @@ -1266,48 +1471,19 @@ static void dump_global(be_gas_decl_env_t *env, const ir_entity *ent) * * @param gt a global like type, either the global or the TLS one * @param env an environment - * @param only_emit_marked if non-zero, external allocated entities that do not have - * its visited flag set are ignored */ -static void be_gas_dump_globals(ir_type *gt, be_gas_decl_env_t *env, - int only_emit_marked) +static void be_gas_emit_globals(ir_type *gt, be_gas_decl_env_t *env) { - int i, n = get_compound_n_members(gt); - waitq *worklist = new_waitq(); - - if (only_emit_marked) { - for (i = 0; i < n; i++) { - ir_entity *ent = get_compound_member(gt, i); - if (is_entity_backend_marked(ent) || entity_has_definition(ent)) { - waitq_put(worklist, ent); - set_entity_backend_marked(ent, 1); - } - } - } else { - for (i = 0; i < n; i++) { - ir_entity *ent = get_compound_member(gt, i); - set_entity_backend_marked(ent, 1); - waitq_put(worklist, ent); - } - } - - env->worklist = worklist; + size_t i, n = get_compound_n_members(gt); - while (!waitq_empty(worklist)) { - ir_entity *ent = waitq_get(worklist); - - dump_global(env, ent); + for (i = 0; i < n; i++) { + ir_entity *ent = get_compound_member(gt, i); + emit_global(env, ent); } - - del_waitq(worklist); - env->worklist = NULL; } -/************************************************************************/ - /* Generate all entities. */ -void be_gas_emit_decls(const be_main_env_t *main_env, - int only_emit_marked_entities) +static void emit_global_decls(const be_main_env_t *main_env) { be_gas_decl_env_t env; memset(&env, 0, sizeof(env)); @@ -1316,16 +1492,12 @@ void be_gas_emit_decls(const be_main_env_t *main_env, env.main_env = main_env; env.section = (be_gas_section_t) -1; - be_gas_dump_globals(get_glob_type(), &env, only_emit_marked_entities); - be_gas_dump_globals(get_tls_type(), &env, only_emit_marked_entities); - be_gas_dump_globals(get_segment_type(IR_SEGMENT_CONSTRUCTORS), &env, - only_emit_marked_entities); - be_gas_dump_globals(get_segment_type(IR_SEGMENT_DESTRUCTORS), &env, - only_emit_marked_entities); - be_gas_dump_globals(main_env->pic_symbols_type, &env, - only_emit_marked_entities); - be_gas_dump_globals(main_env->pic_trampolines_type, &env, - only_emit_marked_entities); + be_gas_emit_globals(get_glob_type(), &env); + be_gas_emit_globals(get_tls_type(), &env); + be_gas_emit_globals(get_segment_type(IR_SEGMENT_CONSTRUCTORS), &env); + be_gas_emit_globals(get_segment_type(IR_SEGMENT_DESTRUCTORS), &env); + be_gas_emit_globals(main_env->pic_symbols_type, &env); + be_gas_emit_globals(main_env->pic_trampolines_type, &env); /** * ".subsections_via_symbols marks object files which are OK to divide @@ -1339,3 +1511,138 @@ void be_gas_emit_decls(const be_main_env_t *main_env, be_emit_write_line(); } } + +void be_emit_jump_table(const ir_node *node, const ir_switch_table *table, + ir_entity *entity, get_cfop_target_func get_cfop_target) +{ + unsigned n_outs = arch_get_irn_n_outs(node); + const ir_node **targets = XMALLOCNZ(const ir_node*, n_outs); + size_t n_entries = ir_switch_table_get_n_entries(table); + unsigned long length = 0; + size_t e; + unsigned i; + const ir_node **labels; + + /* go over all proj's and collect their jump targets */ + foreach_out_edge(node, edge) { + ir_node *proj = get_edge_src_irn(edge); + long pn = get_Proj_proj(proj); + ir_node *target = get_cfop_target(proj); + assert(targets[pn] == NULL); + targets[pn] = target; + } + + /* go over table to determine max value (note that we normalized the + * ranges so that the minimum is 0) */ + for (e = 0; e < n_entries; ++e) { + const ir_switch_table_entry *entry + = ir_switch_table_get_entry_const(table, e); + ir_tarval *max = entry->max; + unsigned long val; + if (entry->pn == 0) + continue; + if (!tarval_is_long(max)) + panic("switch case overflow (%+F)", node); + val = (unsigned long) get_tarval_long(max); + if (val > length) { + length = val; + } + } + + /* the 16000 isn't a real limit of the architecture. But should protect us + * from seamingly endless compiler runs */ + if (length > 16000) { + /* switch lowerer should have broken this monster to pieces... */ + panic("too large switch encountered (%+F)", node); + } + ++length; + + labels = XMALLOCNZ(const ir_node*, length); + for (e = 0; e < n_entries; ++e) { + const ir_switch_table_entry *entry + = ir_switch_table_get_entry_const(table, e); + ir_tarval *min = entry->min; + ir_tarval *max = entry->max; + const ir_node *target = targets[entry->pn]; + assert(entry->pn < (long)n_outs); + if (min == max) { + unsigned long val = (unsigned long)get_tarval_long(max); + labels[val] = target; + } else { + unsigned long min_val; + unsigned long max_val; + unsigned long i; + if (!tarval_is_long(min)) + panic("switch case overflow (%+F)", node); + min_val = (unsigned long)get_tarval_long(min); + max_val = (unsigned long)get_tarval_long(max); + assert(min_val <= max_val); + for (i = min_val; i <= max_val; ++i) { + labels[i] = target; + } + } + } + + /* emit table */ + if (entity != NULL) { + be_gas_emit_switch_section(GAS_SECTION_RODATA); + be_emit_cstring("\t.align 4\n"); + be_gas_emit_entity(entity); + be_emit_cstring(":\n"); + } + + for (i = 0; i < length; ++i) { + const ir_node *block = labels[i]; + if (block == NULL) + block = targets[0]; + be_emit_cstring("\t.long "); + be_gas_emit_block_name(block); + be_emit_char('\n'); + be_emit_write_line(); + } + + if (entity != NULL) + be_gas_emit_switch_section(GAS_SECTION_TEXT); + + xfree(labels); + xfree(targets); +} + +static void emit_global_asms(void) +{ + size_t n = get_irp_n_asms(); + size_t i; + + be_gas_emit_switch_section(GAS_SECTION_TEXT); + for (i = 0; i < n; ++i) { + ident *asmtext = get_irp_asm(i); + + be_emit_cstring("#APP\n"); + be_emit_write_line(); + be_emit_irprintf("%I\n", asmtext); + be_emit_write_line(); + be_emit_cstring("#NO_APP\n"); + be_emit_write_line(); + } +} + +void be_gas_begin_compilation_unit(const be_main_env_t *env) +{ + be_dwarf_open(); + be_dwarf_unit_begin(env->cup_name); + + block_numbers = pmap_create(); + next_block_nr = 0; + + emit_global_asms(); +} + +void be_gas_end_compilation_unit(const be_main_env_t *env) +{ + emit_global_decls(env); + + pmap_destroy(block_numbers); + + be_dwarf_unit_end(); + be_dwarf_close(); +}