X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fbegnuas.c;h=6d4d337d646793f7025ed53d547cffacb251e774;hb=14b4e9b3f48cd53db6c3179283ce8354d5127ce1;hp=f1b48f47f1c3960520a862e371fa2ce597054805;hpb=52b38347d10831203454fe7d2c58f07c7701dd05;p=libfirm diff --git a/ir/be/begnuas.c b/ir/be/begnuas.c index f1b48f47f..6d4d337d6 100644 --- a/ir/be/begnuas.c +++ b/ir/be/begnuas.c @@ -24,9 +24,7 @@ * @date 04.11.2005 * @version $Id$ */ -#ifdef HAVE_CONFIG_H #include "config.h" -#endif #include "begnuas.h" @@ -39,7 +37,6 @@ #include "tv.h" #include "irnode.h" #include "irprog.h" -#include "pdeq.h" #include "entity_t.h" #include "error.h" @@ -48,176 +45,464 @@ #include "be_dbgout.h" /** by default, we generate assembler code for the Linux gas */ -be_gas_flavour_t be_gas_flavour = GAS_FLAVOUR_ELF; +object_file_format_t be_gas_object_file_format = OBJECT_FILE_FORMAT_ELF; +bool be_gas_emit_types = true; +char be_gas_elf_type_char = '@'; static be_gas_section_t current_section = (be_gas_section_t) -1; /** - * 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) { - static const char *text[GAS_FLAVOUR_LAST+1][GAS_SECTION_LAST+1] = { - { /* GAS_FLAVOUR_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 - }, - { /* GAS_FLAVOUR_MINGW */ - ".section\t.text", - ".section\t.data", - ".section .rdata,\"dr\"", - ".section\t.bss", - ".section\t.tbss,\"awT\",@nobits", - ".section\t.ctors,\"aw\",@progbits", - ".section\t.dtors,\"aw\",@progbits", - NULL, - NULL, - NULL - }, - { /* GAS_FLAVOUR_YASM */ - ".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, - NULL, - NULL - }, - { /* GAS_FLAVOUR_MACH_O */ - ".text", - ".data", - ".const", - ".data", - NULL, /* TLS is not supported on Mach-O */ - ".mod_init_func", - NULL, /* TODO: how is this called? */ - ".cstring", - ".section\t__IMPORT,__jump_table,symbol_stubs,self_modifying_code+pure_instructions,5", - ".section\t__IMPORT,__pointers,non_lazy_symbol_pointers" +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) +{ + 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; + default: panic("unsupported scetion type 0x%X", section); + } + be_emit_irprintf("\t.%s\n", name); + be_emit_write_line(); + } 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 { + panic("unsupported section type 0x%X\n", section); + } +} + +static void emit_section(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[] = { + "text", "data", "rodata", "bss", "ctors", "dtors" + }; + static const char *const type[] = { + "progbits", "progbits", "progbits", "nobits", "init_array", "fini_array" }; - assert((int) be_gas_flavour >= 0 && be_gas_flavour <= GAS_FLAVOUR_LAST); - assert((int) section >= 0 && section <= GAS_SECTION_LAST); - return text[be_gas_flavour][section]; -} + if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) { + emit_section_macho(section); + return; + } -void be_gas_emit_switch_section(be_gas_section_t section) { - if(current_section == section) + 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 < sizeof(basename)/sizeof(basename[0])); + be_emit_cstring("\t.section\t."); + /* section name */ + if (flags & GAS_SECTION_FLAG_TLS) + be_emit_char('t'); + be_emit_string(basename[base]); + if (flags & GAS_SECTION_FLAG_COMDAT) { + be_emit_char('.'); + be_gas_emit_entity(entity); + } + + /* section flags */ + be_emit_cstring(",\""); + if (be_gas_object_file_format != OBJECT_FILE_FORMAT_COFF) + be_emit_char('a'); + if (base != GAS_SECTION_RODATA) + be_emit_char('w'); + if (flags & GAS_SECTION_FLAG_TLS) + be_emit_char('T'); + if (flags & GAS_SECTION_FLAG_COMDAT) + be_emit_char('G'); + be_emit_cstring("\","); + be_emit_char(be_gas_elf_type_char); + be_emit_string(type[base]); + + 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; } -void be_gas_emit_function_prolog(ir_entity *entity, unsigned alignment) +void be_gas_emit_switch_section(be_gas_section_t section) { - const char *name = get_entity_ld_name(entity); - const char *fill_byte = ""; - unsigned maximum_skip; + /* you have to produce a switch_section call with entity manually + * for comdat sections */ + assert( !(section & GAS_SECTION_FLAG_COMDAT)); - be_gas_emit_switch_section(GAS_SECTION_TEXT); + emit_section(section, NULL); +} - /* write the begin line (used by scripts processing the assembler... */ - be_emit_write_line(); - be_emit_cstring("# -- Begin "); - be_emit_string(name); +static 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 int initializer_is_string_const(const ir_initializer_t *initializer) +{ + 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]; + + tv = get_initializer_tarval(sub_initializer); + if (!tarval_is_constant(tv)) + return 0; + + 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; + } + + 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: { + 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; + int i, c, n; + + 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); + } 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; +} + +static bool entity_is_null(const ir_entity *entity) +{ + if (entity->initializer != NULL) { + return initializer_is_null(entity->initializer); + } else if (entity_has_compound_ent_values(entity)) { + /* I'm too lazy to implement this case as compound graph paths will be + * remove anyway in the future */ + } + /* uninitialized, NULL is fine */ + return true; +} + +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; +} + +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; + } + + 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(); +} - /* gcc fills space between function with 0x90, no idea if this is needed */ - if (be_gas_flavour == GAS_FLAVOUR_MACH_O) { - fill_byte = "0x90"; - } +static void emit_visibility(const ir_entity *entity) +{ + ir_linkage linkage = get_entity_linkage(entity); - if (alignment > 0) { - maximum_skip = (1 << alignment) - 1; - be_emit_cstring("\t.p2align "); - be_emit_irprintf("%u,%s,%u\n", alignment, fill_byte, maximum_skip); + if (get_entity_linkage(entity) & 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_default) { + be_emit_cstring(".globl "); + be_gas_emit_entity(entity); + be_emit_char('\n'); be_emit_write_line(); } - if (get_entity_visibility(entity) == visibility_external_visible) { - be_emit_cstring(".globl "); - be_emit_string(name); + + if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O + && (linkage & IR_LINKAGE_HIDDEN_USER)) { + 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(const ir_entity *entity, unsigned po2alignment) +{ + be_gas_section_t 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_gas_emit_entity(entity); + be_emit_char('\n'); + be_emit_write_line(); + + if (po2alignment > 0) { + const char *fill_byte = ""; + unsigned maximum_skip = (1 << po2alignment) - 1; + /* gcc fills space between function with 0x90... */ + if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) { + fill_byte = "0x90"; + } + be_emit_cstring("\t.p2align "); + be_emit_irprintf("%u,%s,%u\n", po2alignment, fill_byte, maximum_skip); + be_emit_write_line(); + } + emit_visibility(entity); - switch (be_gas_flavour) { - case GAS_FLAVOUR_ELF: + switch (be_gas_object_file_format) { + case OBJECT_FILE_FORMAT_ELF: be_emit_cstring("\t.type\t"); - be_emit_string(name); - be_emit_cstring(", @function\n"); + be_gas_emit_entity(entity); + be_emit_cstring(", "); + be_emit_char(be_gas_elf_type_char); + be_emit_cstring("function\n"); be_emit_write_line(); break; - case GAS_FLAVOUR_MINGW: + case OBJECT_FILE_FORMAT_COFF: be_emit_cstring("\t.def\t"); - be_emit_string(name); - if (get_entity_visibility(entity) == visibility_external_visible) { - be_emit_cstring(";\t.scl\t2;\t.type\t32;\t.endef\n"); + be_gas_emit_entity(entity); + be_emit_cstring(";"); + if (get_entity_visibility(entity) == ir_visibility_local) { + be_emit_cstring("\t.scl\t3;"); } else { - be_emit_cstring(";\t.scl\t3;\t.type\t32;\t.endef\n"); + be_emit_cstring("\t.scl\t2;"); } + be_emit_cstring("\t.type\t32;\t.endef\n"); be_emit_write_line(); break; - case GAS_FLAVOUR_MACH_O: - case GAS_FLAVOUR_YASM: + case OBJECT_FILE_FORMAT_MACH_O: break; } - be_emit_string(name); + be_gas_emit_entity(entity); be_emit_cstring(":\n"); be_emit_write_line(); } -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); - - if (be_gas_flavour == GAS_FLAVOUR_ELF) { + 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(); } be_emit_cstring("# -- End "); - be_emit_string(name); + be_gas_emit_entity(entity); 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 { - const be_main_env_t *main_env; /**< The main backend environment, used for it's debug handle. */ - be_gas_section_t section; - waitq *worklist; /**< A worklist we use to place not yet handled entities on. */ -} be_gas_decl_env_t; - /************************************************************************/ /** @@ -226,7 +511,7 @@ 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(tarval *tv, int bytes) { switch (bytes) { case 1: @@ -249,54 +534,52 @@ static void dump_arith_tarval(tarval *tv, int bytes) return; case 12: - be_emit_irprintf("0x%02x%02x%02x%02x%02x%02x%02x%02x" - "%02x%02x%02x%02x", 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)); + /* 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("0x%02x%02x%02x%02x%02x%02x%02x%02x" - "%02x%02x%02x%02x%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), + /* 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", + 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, 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, 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) + ); return; } - panic("Can't dump a tarval with %d bytes\n", bytes); -} - -/** - * Return the label prefix for labeled blocks. - */ -const char *be_gas_block_label_prefix(void) { - return ".LG"; + panic("Can't dump a tarval with %d bytes", bytes); } /** * Return the label prefix for labeled instructions. */ -const char *be_gas_insn_label_prefix(void) { +const char *be_gas_insn_label_prefix(void) +{ return ".LE"; } -/** - * Dump a label. - */ -static void dump_label(ir_label_t label) { - be_emit_irprintf("%s%lu", be_gas_block_label_prefix(), label); -} - /** * Return the tarval of an atomic initializer. * @@ -336,9 +619,6 @@ static tarval *get_atomic_init_tv(ir_node *init) case symconst_enum_const: return get_enumeration_value(get_SymConst_enum(init)); - case symconst_label: - return NULL; - default: return NULL; } @@ -355,30 +635,29 @@ static tarval *get_atomic_init_tv(ir_node *init) * @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 do_emit_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); tarval *tv; - ir_label_t label; ir_entity *ent; init = skip_Id(init); switch (get_irn_opcode(init)) { case iro_Cast: - do_dump_atomic_init(env, get_Cast_op(init)); + do_emit_atomic_init(env, get_Cast_op(init)); return; case iro_Conv: - do_dump_atomic_init(env, get_Conv_op(init)); + do_emit_atomic_init(env, get_Conv_op(init)); return; case iro_Const: tv = get_Const_tarval(init); /* it's a arithmetic value */ - dump_arith_tarval(tv, bytes); + emit_arith_tarval(tv, bytes); return; case iro_SymConst: @@ -389,21 +668,11 @@ static void do_dump_atomic_init(be_gas_decl_env_t *env, ir_node *init) 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_emit_ident(get_entity_ld_ident(ent)); + be_gas_emit_entity(ent); break; case symconst_ofs_ent: ent = get_SymConst_entity(init); -#if 0 /* not needed, is it? */ - if(!is_entity_backend_marked(ent)) { - waitq_put(env->worklist, ent); - set_entity_backend_marked(ent, 1); - } -#endif be_emit_irprintf("%d", get_entity_offset(ent)); break; @@ -417,48 +686,47 @@ 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); - break; - - case symconst_label: - label = get_SymConst_label(init); - dump_label(label); + 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; - case iro_Add: - 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)); - be_emit_cstring(" + "); - do_dump_atomic_init(env, get_Add_right(init)); - return; + case iro_Add: + if (!mode_is_int(mode) && !mode_is_reference(mode)) { + panic("Constant must be int or pointer for '+' to work"); + } + do_emit_atomic_init(env, get_Add_left(init)); + be_emit_cstring(" + "); + do_emit_atomic_init(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)); - be_emit_cstring(" - "); - do_dump_atomic_init(env, get_Sub_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_emit_atomic_init(env, get_Sub_left(init)); + be_emit_cstring(" - "); + do_emit_atomic_init(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)); - be_emit_cstring(" * "); - do_dump_atomic_init(env, get_Mul_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_emit_atomic_init(env, get_Mul_left(init)); + be_emit_cstring(" * "); + do_emit_atomic_init(env, get_Mul_right(init)); + return; - default: - assert(0 && "dump_atomic_init(): unknown IR-node"); + case iro_Unknown: + be_emit_cstring("0"); + return; + + default: + panic("emit_atomic_init(): unsupported IR-node %+F", init); } } @@ -467,14 +735,15 @@ 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.word\t"); + be_emit_cstring("\t.short\t"); break; case 4: @@ -487,15 +756,12 @@ static void dump_size_type(size_t size) { case 10: case 12: + case 16: /* Note: .octa does not work on mac */ /* handled in arith */ break; - case 16: - be_emit_cstring("\t.octa\t"); - break; - default: - panic("Try to dump a type with %u bytes\n", (unsigned) size); + panic("Try to dump a type with %u bytes", (unsigned)size); } } @@ -505,13 +771,13 @@ static void dump_size_type(size_t size) { * @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) +static void emit_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); + emit_size_type(bytes); + do_emit_atomic_init(env, init); be_emit_char('\n'); be_emit_write_line(); } @@ -520,127 +786,30 @@ static void dump_atomic_init(be_gas_decl_env_t *env, ir_node *init) /* Routines to dump global variables */ /************************************************************************/ -static int initializer_is_string_const(const ir_initializer_t *initializer) -{ - 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) != get_mode_size_bits(mode_Bs)) - 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; - } - - 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(ir_entity *ent) -{ - ir_type *type, *element_type; - ir_mode *mode; - int i, c, n; - int found_printable = 0; - - 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) != get_mode_size_bits(mode_Bs)) - return 0; - - if(ent->has_initializer) { - /* TODO */ - return 0; - } else { - /* 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; - } - } - - /* then we can emit it as a string constant */ - return found_printable; -} - /** * Dump a string constant. * No checks are made!! * * @param ent The entity to dump. */ -static void dump_string_cst(ir_entity *ent) +static void emit_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); - if (be_gas_flavour == GAS_FLAVOUR_MACH_O) { + 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 \""); - len -= 1; + output_len -= 1; } - for (i = 0; i < len; ++i) { + for (i = 0; i < output_len; ++i) { ir_node *irn; int c; @@ -668,28 +837,28 @@ static void dump_string_cst(ir_entity *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.skip\t%d\n", remaining_space); + if (remaining_space > 0) { + be_emit_irprintf("\t.space\t%d\n", remaining_space); } } -static void dump_string_initializer(const ir_initializer_t *initializer) +static void emit_string_initializer(const ir_initializer_t *initializer) { size_t i, len; len = initializer->compound.n_initializers; - if(be_gas_flavour == GAS_FLAVOUR_MACH_O) { + 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) { + 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); + tarval *tv = get_initializer_tarval(sub_initializer); int c = get_tarval_long(tv); switch (c) { @@ -735,23 +904,22 @@ static int is_type_variable_size(ir_type *type) static size_t get_initializer_size(const ir_initializer_t *initializer, ir_type *type) { - switch(get_initializer_kind(initializer)) { - case IR_INITIALIZER_TARVAL: { + switch (get_initializer_kind(initializer)) { + case IR_INITIALIZER_TARVAL: assert(get_tarval_mode(get_initializer_tarval_value(initializer)) == get_type_mode(type)); return get_type_size_bytes(type); - } case IR_INITIALIZER_CONST: case IR_INITIALIZER_NULL: return get_type_size_bytes(type); - case IR_INITIALIZER_COMPOUND: { - if(!is_type_variable_size(type)) { + case IR_INITIALIZER_COMPOUND: + if (!is_type_variable_size(type)) { 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) { + for (i = 0; i < n_entries; ++i) { ir_entity *entity = get_compound_member(type, i); ir_type *type = get_entity_type(entity); @@ -761,14 +929,13 @@ static size_t get_initializer_size(const ir_initializer_t *initializer, unsigned offset = get_entity_offset(entity); unsigned size = get_initializer_size(sub_initializer, type); - if(offset + size > initializer_size) { + if (offset + size > initializer_size) { initializer_size = offset + size; } } return initializer_size; } } - } panic("found invalid initializer"); } @@ -778,7 +945,7 @@ 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; @@ -788,7 +955,7 @@ static void dump_bitfield(normal_or_bitfield *vals, size_t offset_bits, int value_len; int j; - switch(get_initializer_kind(initializer)) { + switch (get_initializer_kind(initializer)) { case IR_INITIALIZER_NULL: return; case IR_INITIALIZER_TARVAL: @@ -796,7 +963,7 @@ static void dump_bitfield(normal_or_bitfield *vals, size_t offset_bits, break; case IR_INITIALIZER_CONST: { ir_node *node = get_initializer_const_value(initializer); - if(!is_Const(node)) { + if (!is_Const(node)) { panic("bitfield initializer not a Const node"); } tv = get_Const_tarval(node); @@ -806,8 +973,9 @@ static void dump_bitfield(normal_or_bitfield *vals, size_t offset_bits, panic("bitfield initializer is compound"); } if (tv == NULL) { - panic("Couldn't get numeric value for bitfield initializer\n"); + panic("Couldn't get numeric value for bitfield initializer"); } + tv = tarval_convert_to(tv, get_type_mode(type)); /* normalize offset */ vals += offset_bits >> 3; @@ -828,13 +996,13 @@ static void dump_bitfield(normal_or_bitfield *vals, size_t offset_bits, } } -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); - switch(get_initializer_kind(initializer)) { + switch (get_initializer_kind(initializer)) { case IR_INITIALIZER_NULL: return; case IR_INITIALIZER_TARVAL: { @@ -844,7 +1012,7 @@ static void dump_ir_initializer(normal_or_bitfield *vals, vals->kind = TARVAL; 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) { + for (i = 1; i < get_type_size_bytes(type); ++i) { vals[i].kind = NORMAL; vals[i].v.value = NULL; } @@ -856,7 +1024,7 @@ static void dump_ir_initializer(normal_or_bitfield *vals, assert(vals->kind != BITFIELD); vals->kind = NORMAL; vals->v.value = get_initializer_const_value(initializer); - for(i = 1; i < get_type_size_bytes(type); ++i) { + for (i = 1; i < get_type_size_bytes(type); ++i) { vals[i].kind = NORMAL; vals[i].v.value = NULL; } @@ -866,20 +1034,20 @@ static void dump_ir_initializer(normal_or_bitfield *vals, size_t i = 0; size_t n = get_initializer_compound_n_entries(initializer); - if(is_Array_type(type)) { + if (is_Array_type(type)) { ir_type *element_type = get_array_element_type(type); size_t skip = get_type_size_bytes(element_type); size_t alignment = get_type_alignment_bytes(element_type); size_t misalign = skip % alignment; - if(misalign != 0) { + if (misalign != 0) { skip += alignment - misalign; } - for(i = 0; i < n; ++i) { + for (i = 0; i < n; ++i) { 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; } @@ -887,7 +1055,7 @@ static void dump_ir_initializer(normal_or_bitfield *vals, size_t n_members, i; assert(is_compound_type(type)); n_members = get_compound_n_members(type); - for(i = 0; i < n_members; ++i) { + for (i = 0; i < n_members; ++i) { ir_entity *member = get_compound_member(type, i); size_t offset = get_entity_offset(member); ir_type *subtype = get_entity_type(member); @@ -898,21 +1066,21 @@ static void dump_ir_initializer(normal_or_bitfield *vals, sub_initializer = get_initializer_compound_value(initializer, i); - if(mode != NULL) { + 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 || + if (offset_bits != 0 || (value_len != 8 && value_len != 16 && value_len != 32 && value_len != 64)) { - dump_bitfield(&vals[offset], offset_bits, + emit_bitfield(&vals[offset], offset_bits, sub_initializer, subtype); continue; } } - dump_ir_initializer(&vals[offset], sub_initializer, subtype); + emit_ir_initializer(&vals[offset], sub_initializer, subtype); } } @@ -922,16 +1090,16 @@ 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, ir_entity *entity) +static void emit_initializer(be_gas_decl_env_t *env, const ir_entity *entity) { - const ir_initializer_t *initializer = entity->attr.initializer; + const ir_initializer_t *initializer = entity->initializer; ir_type *type; normal_or_bitfield *vals; size_t size; size_t k; - if(initializer_is_string_const(initializer)) { - dump_string_initializer(initializer); + if (initializer_is_string_const(initializer)) { + emit_string_initializer(initializer); return; } @@ -945,35 +1113,35 @@ static void dump_initializer(be_gas_decl_env_t *env, ir_entity *entity) * In the worst case, every initializer allocates one byte. * Moreover, initializer might be big, do not allocate on stack. */ - vals = xcalloc(size, sizeof(vals[0])); + vals = XMALLOCNZ(normal_or_bitfield, size); #ifndef NDEBUG glob_vals = vals; 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) { - if(vals[k].v.value != NULL) { - dump_atomic_init(env, vals[k].v.value); + if (vals[k].v.value != NULL) { + emit_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) { + } 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); + emit_size_type(size); + emit_arith_tarval(tv, size); be_emit_char('\n'); be_emit_write_line(); } else { @@ -990,24 +1158,22 @@ static void dump_initializer(be_gas_decl_env_t *env, ir_entity *entity) /* a gap */ if (space > 0) { - be_emit_irprintf("\t.skip\t%d\n", space); + be_emit_irprintf("\t.space\t%d\n", space); be_emit_write_line(); } } xfree(vals); } -/** - * Dump an initializer for a compound entity. - */ -static void dump_compound_init(be_gas_decl_env_t *env, ir_entity *ent) +static void emit_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->has_initializer) { - dump_initializer(env, ent); + if (entity_is_string_const(ent)) { + emit_string_cst(ent); return; } @@ -1034,7 +1200,7 @@ static void dump_compound_init(be_gas_decl_env_t *env, ir_entity *ent) * In the worst case, every initializer allocates one byte. * Moreover, initializer might be big, do not allocate on stack. */ - vals = xcalloc(last_ofs, sizeof(vals[0])); + vals = XMALLOCNZ(normal_or_bitfield, last_ofs); /* collect the values and store them at the offsets */ for (i = 0; i < n; ++i) { @@ -1046,12 +1212,12 @@ static void dump_compound_init(be_gas_decl_env_t *env, ir_entity *ent) assert(offset_bits >= 0); if (offset_bits != 0 || - (value_len != 8 && value_len != 16 && value_len != 32 && value_len != 64)) { + (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'\n", - get_entity_ld_name(ent)); + panic("Couldn't get numeric value for bitfield initializer '%s'", + get_entity_ld_name(ent)); } /* normalize offset */ offset += offset_bits >> 3; @@ -1082,12 +1248,12 @@ static void dump_compound_init(be_gas_decl_env_t *env, ir_entity *ent) 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); + if (vals[k].v.value != NULL) { + emit_atomic_init(env, vals[k].v.value); skip = get_mode_size_bytes(get_irn_mode(vals[k].v.value)) - 1; - } else { - space = 1; - } + } else { + space = 1; + } } else { assert(vals[k].kind == BITFIELD); be_emit_irprintf("\t.byte\t%d\n", vals[k].v.bf_val); @@ -1103,145 +1269,249 @@ static void dump_compound_init(be_gas_decl_env_t *env, ir_entity *ent) /* a gap */ if (space > 0) { - be_emit_irprintf("\t.skip\t%d\n", space); + be_emit_irprintf("\t.space\t%d\n", space); be_emit_write_line(); } } xfree(vals); } -static void emit_align(unsigned alignment) +static void emit_align(unsigned p2alignment) { - if (!is_po2(alignment)) - panic("alignment not a power of 2"); + be_emit_irprintf("\t.p2align\t%u\n", log2_floor(p2alignment)); + be_emit_write_line(); +} + +static unsigned get_effective_entity_alignment(const ir_entity *entity) +{ + unsigned alignment = get_entity_alignment(entity); + if (alignment == 0) { + ir_type *type = get_entity_type(entity); + alignment = get_type_alignment_bytes(type); + } + return alignment; +} + +static void emit_common(const ir_entity *entity) +{ + 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_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_local_common(const ir_entity *entity) +{ + 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_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_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_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_emit_irprintf(".p2align\t%u\n", log2_floor(alignment)); + be_gas_emit_entity(entity); + be_emit_cstring(":\n"); + be_emit_write_line(); + be_emit_cstring("\t.indirect_symbol "); + be_emit_ident(get_entity_ident(entity)); + be_emit_char('\n'); 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 == firm_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_ident(get_entity_ld_ident(entity)); +} + +void be_gas_emit_block_name(const ir_node *block) +{ + if (has_Block_entity(block)) { + ir_entity *entity = get_Block_entity(block); + be_gas_emit_entity(entity); + } else { + be_emit_irprintf("%s%ld", be_gas_get_private_prefix(), get_irn_node_nr(block)); + } } /** * Dump a global entity. * - * @param env the gas output environment - * @param ent the entity to be dumped + * @param env the gas output environment + * @param ent the entity to be dumped */ -static void dump_global(be_gas_decl_env_t *env, 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 align = get_type_alignment_bytes(type); - int emit_as_common = 0; - be_gas_section_t section = env->section; - ir_variability variability = get_entity_variability(ent); - ir_visibility visibility = get_entity_visibility(ent); + 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 emittet in the code */ + if (type == firm_code_type) + return; + /* we already emitted all methods. Except for the trampolines which + * the assembler/linker generates */ if (is_Method_type(type) && section != GAS_SECTION_PIC_TRAMPOLINES) { + /* functions with graph are already emitted with + * be_gas_emit_function_prolog */ + if (get_entity_irg(entity) == NULL) { + emit_visibility(entity); + } return; } - if (section != (be_gas_section_t) -1) { - emit_as_common = 0; - } else if (variability == variability_constant) { - /* a constant entity, put it on the rdata */ - section = GAS_SECTION_RODATA; - if (be_gas_flavour == GAS_FLAVOUR_MACH_O - && ent_is_string_const(ent)) { - section = GAS_SECTION_CSTRING; + be_dbg_variable(entity); + + if (section == GAS_SECTION_BSS) { + ir_visibility visibility = get_entity_visibility(entity); + + switch (visibility) { + case ir_visibility_local: + case ir_visibility_private: + emit_local_common(entity); + return; + case ir_visibility_default: + if (linkage & IR_LINKAGE_MERGE) { + emit_common(entity); + return; + } + break; + case ir_visibility_external: + if (linkage & IR_LINKAGE_MERGE) + panic("merge link semantic not supported for extern entities"); + break; } - } else if (variability == variability_uninitialized) { - /* uninitialized entity put it in bss segment */ - section = GAS_SECTION_COMMON; - if (visibility != visibility_local) - emit_as_common = 1; - } else { - section = GAS_SECTION_DATA; } - if(!emit_as_common) { - be_gas_emit_switch_section(section); + emit_visibility(entity); + if (visibility == ir_visibility_external) { + /* nothing to do for externally defined values */ + return; } - be_dbg_variable(ent); + if (!is_po2(alignment)) + panic("alignment not a power of 2"); + + emit_section(section, entity); - /* global or not global */ - if (visibility == visibility_external_visible && !emit_as_common) { - be_emit_cstring(".globl\t"); - be_emit_ident(ld_ident); - be_emit_char('\n'); - be_emit_write_line(); - } else if(visibility == visibility_external_allocated) { - be_emit_cstring(".globl\t"); - be_emit_ident(ld_ident); - be_emit_char('\n'); - be_emit_write_line(); - /* we can return now... */ + if (section == GAS_SECTION_PIC_TRAMPOLINES + || section == GAS_SECTION_PIC_SYMBOLS) { + emit_indirect_symbol(entity, section); return; } + /* alignment */ - if (align > 1 && !emit_as_common && section != GAS_SECTION_PIC_TRAMPOLINES - && section != GAS_SECTION_PIC_SYMBOLS) { - emit_align(align); + if (alignment > 1) { + emit_align(alignment); + } + if (be_gas_object_file_format == OBJECT_FILE_FORMAT_ELF + && be_gas_emit_types) { + be_emit_cstring("\t.type\t"); + 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_gas_emit_entity(entity); + be_emit_irprintf(", %u\n", get_type_size_bytes(type)); } - if (!emit_as_common) { - be_emit_ident(ld_ident); + if (get_id_str(ld_ident)[0] != '\0') { + be_gas_emit_entity(entity); be_emit_cstring(":\n"); be_emit_write_line(); } - if (variability == variability_uninitialized) { - if (emit_as_common) { - switch (be_gas_flavour) { - case GAS_FLAVOUR_ELF: - case GAS_FLAVOUR_MACH_O: - case GAS_FLAVOUR_YASM: - be_emit_irprintf("\t.comm %s,%u,%u\n", - get_id_str(ld_ident), get_type_size_bytes(type), align); - be_emit_write_line(); - break; - case GAS_FLAVOUR_MINGW: - be_emit_irprintf("\t.comm %s,%u # %u\n", - get_id_str(ld_ident), get_type_size_bytes(type), align); - be_emit_write_line(); - break; - } - } else if (section == GAS_SECTION_PIC_TRAMPOLINES) { - if (be_gas_flavour == GAS_FLAVOUR_MACH_O) { - be_emit_cstring("\t.indirect_symbol "); - be_emit_ident(get_entity_ident(ent)); - be_emit_char('\n'); - be_emit_write_line(); - be_emit_cstring("\thlt ; hlt ; hlt ; hlt ; hlt\n"); - be_emit_write_line(); - } else { - panic("PIC trampolines not yet supported in this gas mode"); - } - } else { - be_emit_irprintf("\t.space %u\n", get_type_size_bytes(type)); - be_emit_write_line(); - } + if (entity_is_null(entity)) { + be_emit_irprintf("\t.space %u\n", get_type_size_bytes(type)); + be_emit_write_line(); + } else if(entity_has_compound_ent_values(entity)) { + emit_compound_graph_init(env, entity); } else { - if (is_atomic_entity(ent)) { - dump_atomic_init(env, get_atomic_ent_value(ent)); - } else { - /* sort_compound_ent_values(ent); */ - - switch (get_type_tpop_code(get_entity_type(ent))) { - case tpo_array: - if (ent_is_string_const(ent)) - dump_string_cst(ent); - else - dump_compound_init(env, ent); - break; - case tpo_struct: - case tpo_class: - case tpo_union: - dump_compound_init(env, ent); - break; - default: - assert(0); - } - } + assert(entity->initializer != NULL); + emit_initializer(env, entity); } } @@ -1250,78 +1520,45 @@ static void dump_global(be_gas_decl_env_t *env, 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) || - get_entity_visibility(ent) != visibility_external_allocated) { - 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; - 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) +void be_gas_emit_decls(const be_main_env_t *main_env) { be_gas_decl_env_t env; memset(&env, 0, sizeof(env)); - env.main_env = main_env; - /* dump global type */ - env.section = (be_gas_section_t) -1; - be_gas_dump_globals(get_glob_type(), &env, only_emit_marked_entities); - env.section = GAS_SECTION_TLS; - be_gas_dump_globals(get_tls_type(), &env, only_emit_marked_entities); - env.section = GAS_SECTION_CONSTRUCTORS; - be_gas_dump_globals(get_segment_type(IR_SEGMENT_CONSTRUCTORS), &env, - only_emit_marked_entities); - env.section = GAS_SECTION_DESTRUCTORS; - be_gas_dump_globals(get_segment_type(IR_SEGMENT_DESTRUCTORS), &env, - only_emit_marked_entities); - - env.section = GAS_SECTION_PIC_SYMBOLS; - be_gas_dump_globals(main_env->pic_symbols_type, &env, - only_emit_marked_entities); - - if (get_compound_n_members(main_env->pic_trampolines_type) > 0) { - env.section = GAS_SECTION_PIC_TRAMPOLINES; - be_gas_dump_globals(main_env->pic_trampolines_type, &env, - only_emit_marked_entities); - if (be_gas_flavour == GAS_FLAVOUR_MACH_O) { - be_emit_cstring("\t.subsections_via_symbols\n"); - be_emit_write_line(); - } + env.main_env = main_env; + env.section = (be_gas_section_t) -1; + + 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 + * their section contents into individual blocks". + * From my understanding this means no label points in the middle of an + * object which we want to address as a whole. Firm code should be fine + * with this. + */ + if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) { + be_emit_cstring("\t.subsections_via_symbols\n"); + be_emit_write_line(); } }