X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;ds=sidebyside;f=ir%2Fbe%2Fbegnuas.c;h=b4bffedaf4d94c35b9f8047738b18fd3f8747e10;hb=64723d1bd8ace74ca5f0018db8655f2a1f443532;hp=8360ec2812ee2a2f90c781aeab7d949ea39e2b20;hpb=16b814ebb6d59409fb74416bdde1a891028b26fb;p=libfirm diff --git a/ir/be/begnuas.c b/ir/be/begnuas.c index 8360ec281..b4bffedaf 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" @@ -48,7 +45,9 @@ #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; @@ -60,9 +59,10 @@ static be_gas_section_t current_section = (be_gas_section_t) -1; * * @return the pseudo-instruction */ -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 */ +static const char *get_section_name(be_gas_section_t section) +{ + static const char *text[OBJECT_FILE_FORMAT_LAST+1][GAS_SECTION_LAST+1] = { + { /* OBJECT_FILE_FORMAT_ELF */ ".section\t.text", ".section\t.data", ".section\t.rodata", @@ -74,51 +74,41 @@ static const char *get_section_name(be_gas_section_t section) { NULL, NULL }, - { /* GAS_FLAVOUR_MINGW */ + { /* OBJECT_FILE_FORMAT_COFF */ ".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", + ".section\t.ctors,\"w\"", + ".section\t.dtors,\"w\"", NULL, NULL, NULL }, - { /* GAS_FLAVOUR_MACH_O */ + { /* OBJECT_FILE_FORMAT_MACH_O */ ".text", ".data", ".const", ".data", NULL, /* TLS is not supported on Mach-O */ ".mod_init_func", - NULL, /* TODO: how is this called? */ + NULL, /* are there destructors on mach-o? */ ".cstring", ".section\t__IMPORT,__jump_table,symbol_stubs,self_modifying_code+pure_instructions,5", ".section\t__IMPORT,__pointers,non_lazy_symbol_pointers" } }; - assert((int) be_gas_flavour >= 0 && be_gas_flavour <= GAS_FLAVOUR_LAST); + assert((int) be_gas_object_file_format >= 0 + && be_gas_object_file_format <= OBJECT_FILE_FORMAT_LAST); assert((int) section >= 0 && section <= GAS_SECTION_LAST); - return text[be_gas_flavour][section]; + return text[be_gas_object_file_format][section]; } -void be_gas_emit_switch_section(be_gas_section_t section) { - if(current_section == section) +void be_gas_emit_switch_section(be_gas_section_t section) +{ + if (current_section == section) return; be_emit_char('\t'); @@ -128,58 +118,77 @@ void be_gas_emit_switch_section(be_gas_section_t section) { current_section = section; } -void be_gas_emit_function_prolog(ir_entity *entity, unsigned alignment) +static void emit_entity_visibility(const ir_entity *entity) +{ + ir_visibility visibility = get_entity_visibility(entity); + ir_linkage linkage = get_entity_linkage(entity); + + if (visibility != ir_visibility_local) { + be_emit_cstring(".globl "); + be_emit_ident(get_entity_ld_ident(entity)); + be_emit_char('\n'); + be_emit_write_line(); + } + if (linkage & IR_LINKAGE_WEAK) { + if (! (linkage & IR_LINKAGE_MERGE)) { + panic("Weak symbols only supported in combination with IR_LINKAGE_MERGE on this architecture"); + } + be_emit_cstring(".weak "); + be_emit_ident(get_entity_ld_ident(entity)); + be_emit_char('\n'); + be_emit_write_line(); + } +} + +void be_gas_emit_function_prolog(ir_entity *entity, unsigned po2alignment) { const char *name = get_entity_ld_name(entity); - const char *fill_byte = ""; - unsigned maximum_skip; be_gas_emit_switch_section(GAS_SECTION_TEXT); - /* write the begin line (used by scripts processing the assembler... */ + /* write the begin line (makes the life easier for scripts parsing the + * assembler) */ be_emit_write_line(); be_emit_cstring("# -- Begin "); be_emit_string(name); be_emit_char('\n'); be_emit_write_line(); - /* gcc fills space between function with 0x90, no idea if this is needed */ - if (be_gas_flavour == GAS_FLAVOUR_MACH_O) { - fill_byte = "0x90"; - } - - if (alignment > 0) { - maximum_skip = (1 << alignment) - 1; + 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", alignment, fill_byte, maximum_skip); - be_emit_write_line(); - } - if (get_entity_visibility(entity) == visibility_external_visible) { - be_emit_cstring(".globl "); - be_emit_string(name); - be_emit_char('\n'); + be_emit_irprintf("%u,%s,%u\n", po2alignment, fill_byte, maximum_skip); be_emit_write_line(); } + emit_entity_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_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_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); @@ -191,7 +200,7 @@ void be_gas_emit_function_epilog(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_emit_cstring(", .-"); @@ -213,9 +222,8 @@ void be_gas_emit_function_epilog(ir_entity *entity) * 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. */ + const be_main_env_t *main_env; } be_gas_decl_env_t; /************************************************************************/ @@ -285,22 +293,28 @@ static void dump_arith_tarval(tarval *tv, int bytes) /** * Return the label prefix for labeled blocks. */ -const char *be_gas_block_label_prefix(void) { +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) { +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); +void be_gas_emit_entity(ir_entity *entity) +{ + if (entity->type == firm_code_type) { + ir_label_t label = get_entity_label(entity); + be_emit_string(be_gas_block_label_prefix()); + be_emit_irprintf("%lu", label); + } else { + be_emit_ident(get_entity_ld_ident(entity)); + } } /** @@ -342,9 +356,6 @@ 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; } @@ -366,7 +377,6 @@ static void do_dump_atomic_init(be_gas_decl_env_t *env, ir_node *init) ir_mode *mode = get_irn_mode(init); int bytes = get_mode_size_bytes(mode); tarval *tv; - ir_label_t label; ir_entity *ent; init = skip_Id(init); @@ -395,21 +405,11 @@ 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; @@ -426,11 +426,6 @@ static void do_dump_atomic_init(be_gas_decl_env_t *env, ir_node *init) dump_arith_tarval(tv, bytes); break; - case symconst_label: - label = get_SymConst_label(init); - dump_label(label); - break; - default: assert(!"dump_atomic_init(): don't know how to init from this SymConst"); } @@ -463,6 +458,10 @@ static void do_dump_atomic_init(be_gas_decl_env_t *env, ir_node *init) do_dump_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); } @@ -480,7 +479,7 @@ static void dump_size_type(size_t size) { break; case 2: - be_emit_cstring("\t.word\t"); + be_emit_cstring("\t.short\t"); break; case 4: @@ -531,33 +530,32 @@ 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) + if (initializer->kind != IR_INITIALIZER_COMPOUND) return 0; len = initializer->compound.n_initializers; if (len < 1) return 0; - for(i = 0; i < len; ++i) { + 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) + 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)) + 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) + else if (c != 0) return 0; if (i == len - 1 && c != '\0') @@ -572,12 +570,11 @@ static int initializer_is_string_const(const ir_initializer_t *initializer) * @param ent The entity * @return 1 if it is a string constant, 0 otherwise */ -static int ent_is_string_const(ir_entity *ent) +static int ent_is_string_const(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); @@ -594,14 +591,13 @@ static int ent_is_string_const(ir_entity *ent) /* 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)) + if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8) return 0; - if(ent->has_initializer) { - /* TODO */ - return 0; - } else { + 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) { @@ -613,16 +609,16 @@ static int ent_is_string_const(ir_entity *ent) if (isgraph(c) || isspace(c)) found_printable = 1; - else if(c != 0) + else if (c != 0) return 0; if (i == n - 1 && c != '\0') return 0; } + return found_printable; } - /* then we can emit it as a string constant */ - return found_printable; + return 0; } /** @@ -631,22 +627,24 @@ static int ent_is_string_const(ir_entity *ent) * * @param ent The entity to dump. */ -static void dump_string_cst(ir_entity *ent) +static void dump_string_cst(const ir_entity *ent) { int i, len; + int output_len; ir_type *type; int type_size; int remaining_space; - len = get_compound_ent_n_values(ent); - 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; @@ -674,8 +672,8 @@ 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); } } @@ -684,14 +682,14 @@ static void dump_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); @@ -741,23 +739,22 @@ 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); @@ -767,14 +764,13 @@ 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"); } @@ -794,7 +790,7 @@ 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: @@ -802,7 +798,7 @@ 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); @@ -814,6 +810,7 @@ static void dump_bitfield(normal_or_bitfield *vals, size_t offset_bits, if (tv == NULL) { panic("Couldn't get numeric value for bitfield initializer"); } + tv = tarval_convert_to(tv, get_type_mode(type)); /* normalize offset */ vals += offset_bits >> 3; @@ -840,7 +837,7 @@ static void dump_ir_initializer(normal_or_bitfield *vals, { 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: { @@ -850,7 +847,7 @@ 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; } @@ -862,7 +859,7 @@ 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; } @@ -872,16 +869,16 @@ 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); @@ -893,7 +890,7 @@ 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); @@ -904,12 +901,12 @@ 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, @@ -928,15 +925,15 @@ 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 dump_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)) { + if (initializer_is_string_const(initializer)) { dump_string_initializer(initializer); return; } @@ -951,7 +948,7 @@ 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; @@ -965,13 +962,13 @@ static void dump_initializer(be_gas_decl_env_t *env, ir_entity *entity) int space = 0; int elem_size = 1; if (vals[k].kind == NORMAL) { - if(vals[k].v.value != NULL) { + if (vals[k].v.value != NULL) { dump_atomic_init(env, vals[k].v.value); elem_size = get_mode_size_bytes(get_irn_mode(vals[k].v.value)); } else { elem_size = 0; } - } else if(vals[k].kind == TARVAL) { + } else if (vals[k].kind == TARVAL) { tarval *tv = vals[k].v.tarval; size_t size = get_mode_size_bytes(get_tarval_mode(tv)); @@ -996,24 +993,22 @@ 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 dump_compound_graph_init(be_gas_decl_env_t *env, + const ir_entity *ent) { normal_or_bitfield *vals; int i, j, n; unsigned k, last_ofs; - if(ent->has_initializer) { - dump_initializer(env, ent); + if (ent_is_string_const(ent)) { + dump_string_cst(ent); return; } @@ -1040,7 +1035,7 @@ 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) { @@ -1052,12 +1047,12 @@ 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'", - get_entity_ld_name(ent)); + get_entity_ld_name(ent)); } /* normalize offset */ offset += offset_bits >> 3; @@ -1088,12 +1083,12 @@ 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) { + if (vals[k].v.value != NULL) { dump_atomic_init(env, vals[k].v.value); skip = get_mode_size_bytes(get_irn_mode(vals[k].v.value)) - 1; - } else { - space = 1; - } + } else { + space = 1; + } } else { assert(vals[k].kind == BITFIELD); be_emit_irprintf("\t.byte\t%d\n", vals[k].v.bf_val); @@ -1109,161 +1104,157 @@ 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(alignment)); + 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 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)) { + ir_linkage linkage = get_entity_linkage(entity); + if (linkage & IR_LINKAGE_CONSTANT) { + /* mach-o is the only one with a cstring section */ + if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O + && ent_is_string_const(entity)) + return GAS_SECTION_CSTRING; + + return GAS_SECTION_RODATA; + } + if (!entity_has_definition(entity)) + return GAS_SECTION_BSS; + + return GAS_SECTION_DATA; + + } else if (owner == env->main_env->pic_symbols_type) { + return GAS_SECTION_PIC_SYMBOLS; + } else if (owner == env->main_env->pic_trampolines_type) { + return GAS_SECTION_PIC_TRAMPOLINES; + } else if (owner == get_segment_type(IR_SEGMENT_CONSTRUCTORS)) { + return GAS_SECTION_CONSTRUCTORS; + } else if (owner == get_segment_type(IR_SEGMENT_DESTRUCTORS)) { + return GAS_SECTION_DESTRUCTORS; + } else if (owner == get_segment_type(IR_SEGMENT_THREAD_LOCAL)) { + return GAS_SECTION_TLS; + } + + panic("Couldn't determine section for %+F?!?", entity); +} + +static void emit_common(const ir_entity *ent) +{ + const char *name = get_entity_ld_name(ent); + unsigned size = get_type_size_bytes(get_entity_type(ent)); + unsigned alignment = get_effective_entity_alignment(ent); + + switch (be_gas_object_file_format) { + case OBJECT_FILE_FORMAT_MACH_O: + be_emit_irprintf("\t.comm %s,%u,%u\n", name, size, + log2_floor(alignment)); + be_emit_write_line(); + return; + case OBJECT_FILE_FORMAT_ELF: + be_emit_irprintf("\t.comm %s,%u,%u\n", name, size, alignment); + be_emit_write_line(); + return; + case OBJECT_FILE_FORMAT_COFF: + be_emit_irprintf("\t.comm %s,%u # %u\n", name, size, alignment); + be_emit_write_line(); + return; + } + panic("invalid object file format"); +} + /** * 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 dump_global(be_gas_decl_env_t *env, const ir_entity *ent) { 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); + unsigned alignment = get_effective_entity_alignment(ent); + be_gas_section_t section = determine_section(env, ent); + /* we already emitted all methods. Except for the trampolines which + * the assembler/linker generates */ if (is_Method_type(type) && section != GAS_SECTION_PIC_TRAMPOLINES) { return; } + /* block labels are already emittet in the code */ + if (type == firm_code_type) + return; - 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; - } - } 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; - } + be_dbg_variable(ent); - if(!emit_as_common) { - be_gas_emit_switch_section(section); - } + /* nothing to do for externally defined values */ + if (get_entity_visibility(ent) == ir_visibility_external) + 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... */ + if (section == GAS_SECTION_BSS && + (get_entity_linkage(ent) & IR_LINKAGE_MERGE)) { + if (get_entity_visibility(ent) != ir_visibility_default) { + panic("merge link semantic not supported for local/extern entities"); + } + emit_common(ent); return; } + + be_gas_emit_switch_section(section); + /* 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 (visibility != visibility_external_allocated && !emit_as_common - && be_gas_flavour == GAS_FLAVOUR_ELF) { + emit_entity_visibility(ent); + if (be_gas_object_file_format == OBJECT_FILE_FORMAT_ELF + && be_gas_emit_types) { be_emit_cstring("\t.type\t"); be_emit_ident(ld_ident); - be_emit_cstring(", @object\n\t.size\t"); + be_emit_cstring(", "); + be_emit_char(be_gas_elf_type_char); + be_emit_cstring("object\n\t.size\t"); be_emit_ident(ld_ident); be_emit_irprintf(", %u\n", get_type_size_bytes(type)); } + be_emit_ident(ld_ident); + be_emit_cstring(":\n"); + be_emit_write_line(); - if (!emit_as_common) { - be_emit_ident(ld_ident); - 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 - || 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 (ent->initializer != NULL) { + dump_initializer(env, ent); + } else if(entity_has_compound_ent_values(ent)) { + dump_compound_graph_init(env, ent); } 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); - } - } + /* uninitialized */ + be_emit_irprintf("\t.space %u\n", get_type_size_bytes(type)); + be_emit_write_line(); } } @@ -1272,78 +1263,45 @@ 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_dump_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); + for (i = 0; i < n; i++) { + ir_entity *ent = get_compound_member(gt, i); dump_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_dump_globals(get_glob_type(), &env); + be_gas_dump_globals(get_tls_type(), &env); + be_gas_dump_globals(get_segment_type(IR_SEGMENT_CONSTRUCTORS), &env); + be_gas_dump_globals(get_segment_type(IR_SEGMENT_DESTRUCTORS), &env); + be_gas_dump_globals(main_env->pic_symbols_type, &env); + be_gas_dump_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(); } }