X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fbegnuas.c;h=6c2165bb1f0f28c53e016db398f44a26e7c7f21c;hb=43e469dac6283dc1961116c4e8b02b27cfc104dc;hp=f534cf7abc10725b384437b1785ac9562f106c7a;hpb=80d22a2b8ed15af53c7134a3025da89ccb1923ca;p=libfirm diff --git a/ir/be/begnuas.c b/ir/be/begnuas.c index f534cf7ab..6c2165bb1 100644 --- a/ir/be/begnuas.c +++ b/ir/be/begnuas.c @@ -37,193 +37,547 @@ #include "tv.h" #include "irnode.h" #include "irprog.h" -#include "pdeq.h" #include "entity_t.h" #include "error.h" +#include "util.h" #include "be_t.h" #include "beemitter.h" #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,\"w\"", - ".section\t.dtors,\"w\"", - 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_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[] = { + "text", "data", "rodata", "bss", "ctors", "dtors" }; - 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 (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) { - if (current_section == 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" + }; + + if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) { + emit_section_macho(section); + return; + } else if(be_gas_object_file_format == OBJECT_FILE_FORMAT_ELF_SPARC) { + emit_section_sparc(section, entity); return; + } + + if (current_section == section && !(section & GAS_SECTION_FLAG_COMDAT)) + return; + current_section = 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(basename)); + 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); + } - be_emit_char('\t'); - be_emit_string(get_section_name(section)); + /* section flags */ + be_emit_cstring(",\""); + if (be_gas_object_file_format != OBJECT_FILE_FORMAT_COFF) + be_emit_char('a'); + if (base == GAS_SECTION_TEXT) + be_emit_char('x'); + if (base != GAS_SECTION_RODATA && base != GAS_SECTION_TEXT) + be_emit_char('w'); + 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(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 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; + 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 */ + return false; + } + /* 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; + } + + /* 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(); +} - /* 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) + && 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(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: + case OBJECT_FILE_FORMAT_ELF_SPARC: 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 { - be_gas_section_t section; - waitq *worklist; /**< A worklist we use to place not yet handled entities on. */ -} be_gas_decl_env_t; - -/************************************************************************/ - /** * Output a tarval. * * @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, int bytes) { switch (bytes) { case 1: @@ -262,16 +616,21 @@ static void dump_arith_tarval(tarval *tv, int bytes) return; case 16: + /* 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%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), + "\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, 3), get_tarval_sub_bits(tv, 2), - get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0) + 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) ); return; } @@ -279,29 +638,12 @@ static void dump_arith_tarval(tarval *tv, int bytes) 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. */ -const char *be_gas_insn_label_prefix(void) { - return ".LE"; -} - -void be_gas_emit_entity(ir_entity *entity) +const char *be_gas_insn_label_prefix(void) { - 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 ".LE"; } /** @@ -311,7 +653,7 @@ void be_gas_emit_entity(ir_entity *entity) * * @return the tarval */ -static tarval *get_atomic_init_tv(ir_node *init) +static ir_tarval *get_atomic_init_tv(ir_node *init) { for (;;) { ir_mode *mode = get_irn_mode(init); @@ -359,43 +701,35 @@ 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_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)); + 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: 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; @@ -414,11 +748,11 @@ 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; @@ -426,31 +760,35 @@ 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)); + do_emit_atomic_init(env, get_Add_left(init)); be_emit_cstring(" + "); - do_dump_atomic_init(env, get_Add_right(init)); + 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)); + do_emit_atomic_init(env, get_Sub_left(init)); be_emit_cstring(" - "); - do_dump_atomic_init(env, get_Sub_right(init)); + 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)); + do_emit_atomic_init(env, get_Mul_left(init)); be_emit_cstring(" * "); - do_dump_atomic_init(env, get_Mul_right(init)); + do_emit_atomic_init(env, get_Mul_right(init)); + return; + + case iro_Unknown: + be_emit_cstring("0"); return; default: - panic("dump_atomic_init(): unsupported IR-node %+F", init); + panic("emit_atomic_init(): unsupported IR-node %+F", init); } } @@ -459,14 +797,15 @@ 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: @@ -479,13 +818,10 @@ 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", (unsigned)size); } @@ -497,125 +833,24 @@ 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(); } -/************************************************************************/ -/* 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) != 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; -} - -/** - * 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) != 8) - 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; @@ -625,7 +860,7 @@ static void dump_string_cst(ir_entity *ent) len = get_compound_ent_n_values(ent); output_len = len; - 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 \""); @@ -661,16 +896,16 @@ static void dump_string_cst(ir_entity *ent) remaining_space = type_size - len; assert(remaining_space >= 0); if (remaining_space > 0) { - be_emit_irprintf("\t.space\t%d\n", remaining_space); + be_emit_irprintf("\t.space\t%d, 0\n", remaining_space); } } -static void dump_string_initializer(const ir_initializer_t *initializer) +static size_t 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 \""); @@ -681,8 +916,8 @@ static void dump_string_initializer(const ir_initializer_t *initializer) 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); + ir_tarval *tv = get_initializer_tarval(sub_initializer); + int c = get_tarval_long(tv); switch (c) { case '"' : be_emit_cstring("\\\""); break; @@ -700,20 +935,24 @@ static void dump_string_initializer(const ir_initializer_t *initializer) } be_emit_cstring("\"\n"); be_emit_write_line(); + + return initializer->compound.n_initializers; } -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; 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; @@ -728,14 +967,13 @@ static size_t get_initializer_size(const ir_initializer_t *initializer, ir_type *type) { switch (get_initializer_kind(initializer)) { - case IR_INITIALIZER_TARVAL: { + 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: { + case IR_INITIALIZER_COMPOUND: if (!is_type_variable_size(type)) { return get_type_size_bytes(type); } else { @@ -760,7 +998,6 @@ static size_t get_initializer_size(const ir_initializer_t *initializer, return initializer_size; } } - } panic("found invalid initializer"); } @@ -770,15 +1007,16 @@ 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: @@ -802,31 +1040,57 @@ 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); + 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: return; @@ -872,7 +1136,7 @@ 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; } @@ -894,18 +1158,19 @@ 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); + 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, + && value_len != 64) || + (is_Primitive_type(subtype) && get_primitive_base_type(subtype) != NULL)) { + 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); } } @@ -915,16 +1180,16 @@ 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); + emit_string_initializer(initializer); return; } @@ -945,34 +1210,42 @@ static void dump_initializer(be_gas_decl_env_t *env, 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; + int elem_size = 1; + normal_or_bitfield_kind kind = vals[k].kind; + switch (kind) { + case NORMAL: if (vals[k].v.value != NULL) { - dump_atomic_init(env, vals[k].v.value); + 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) { - tarval *tv = vals[k].v.tarval; - size_t size = get_mode_size_bytes(get_tarval_mode(tv)); + } else { + elem_size = 0; + } + break; + case TARVAL: { + ir_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 { - assert(vals[k].kind == BITFIELD); + 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(); + break; } k += elem_size; @@ -983,24 +1256,22 @@ static void dump_initializer(be_gas_decl_env_t *env, ir_entity *entity) /* 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(); } } 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; } @@ -1039,12 +1310,12 @@ 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)) { - tarval *tv = get_atomic_init_tv(value); + (value_len != 8 && value_len != 16 && value_len != 32 && value_len != 64)) { + ir_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)); + get_entity_ld_name(ent)); } /* normalize offset */ offset += offset_bits >> 3; @@ -1076,11 +1347,11 @@ static void dump_compound_init(be_gas_decl_env_t *env, ir_entity *ent) int space = 0, skip = 0; if (vals[k].kind == NORMAL) { if (vals[k].v.value != NULL) { - dump_atomic_init(env, vals[k].v.value); + 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); @@ -1096,7 +1367,7 @@ static void dump_compound_init(be_gas_decl_env_t *env, ir_entity *ent) /* 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(); } } @@ -1109,7 +1380,7 @@ static void emit_align(unsigned p2alignment) be_emit_write_line(); } -static unsigned get_effective_entity_alignment(ir_entity *entity) +static unsigned get_effective_entity_alignment(const ir_entity *entity) { unsigned alignment = get_entity_alignment(entity); if (alignment == 0) { @@ -1119,152 +1390,225 @@ static unsigned get_effective_entity_alignment(ir_entity *entity) 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: + case OBJECT_FILE_FORMAT_ELF_SPARC: + 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: + case OBJECT_FILE_FORMAT_ELF_SPARC: + 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_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 alignment = get_effective_entity_alignment(ent); - 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) { + 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"); - /* 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... */ + emit_section(section, entity); + + if (section == GAS_SECTION_PIC_TRAMPOLINES + || section == GAS_SECTION_PIC_SYMBOLS) { + emit_indirect_symbol(entity, section); return; } - if (!is_po2(alignment)) - panic("alignment not a power of 2"); + /* alignment */ - if (alignment > 1 && !emit_as_common && section != GAS_SECTION_PIC_TRAMPOLINES - && section != GAS_SECTION_PIC_SYMBOLS) { + if (alignment > 1) { emit_align(alignment); } - - if (visibility != visibility_external_allocated && !emit_as_common - && be_gas_flavour == GAS_FLAVOUR_ELF) { + if (be_gas_object_file_format == OBJECT_FILE_FORMAT_ELF + && be_gas_emit_types + && visibility != ir_visibility_private) { be_emit_cstring("\t.type\t"); - be_emit_ident(ld_ident); - be_emit_cstring(", @object\n\t.size\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_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_MACH_O: - be_emit_irprintf("\t.comm %s,%u,%u\n", - get_id_str(ld_ident), get_type_size_bytes(type), - log2_floor(alignment)); - break; - case GAS_FLAVOUR_ELF: - case GAS_FLAVOUR_YASM: - be_emit_irprintf("\t.comm %s,%u,%u\n", - get_id_str(ld_ident), get_type_size_bytes(type), alignment); - 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), alignment); - be_emit_write_line(); - break; - } - } else if (section == GAS_SECTION_PIC_TRAMPOLINES - || section == GAS_SECTION_PIC_SYMBOLS) { - 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(); - 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(); - } - } 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, 0\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: - panic("Unimplemented type kind in dump_global()"); - } - } + assert(entity->initializer != NULL); + emit_initializer(env, entity); } } @@ -1273,76 +1617,43 @@ 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)); /* 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(); } }