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)
+typedef struct _be_gas_decl_env {
+ be_gas_section_t section;
+ const be_main_env_t *main_env;
+} be_gas_decl_env_t;
+
+static void emit_section_macho(be_gas_section_t section)
{
- static const char *text[OBJECT_FILE_FORMAT_LAST+1][GAS_SECTION_LAST+1] = {
- { /* OBJECT_FILE_FORMAT_ELF */
- ".section\t.text",
- ".section\t.data",
- ".section\t.rodata",
- ".section\t.bss",
- ".section\t.tbss,\"awT\",@nobits",
- ".section\t.ctors,\"aw\",@progbits",
- ".section\t.dtors,\"aw\",@progbits",
- NULL, /* no cstring section */
- NULL,
- NULL
- },
- { /* OBJECT_FILE_FORMAT_COFF */
- ".section\t.text",
- ".section\t.data",
- ".section .rdata,\"dr\"",
- ".section\t.bss",
- ".section\t.tbss,\"awT\",@nobits",
- ".section\t.ctors,\"w\"",
- ".section\t.dtors,\"w\"",
- NULL,
- NULL,
- NULL
- },
- { /* OBJECT_FILE_FORMAT_MACH_O */
- ".text",
- ".data",
- ".const",
- ".data",
- NULL, /* TLS is not supported on Mach-O */
- ".mod_init_func",
- ".mod_term_func",
- ".cstring",
- ".section\t__IMPORT,__jump_table,symbol_stubs,self_modifying_code+pure_instructions,5",
- ".section\t__IMPORT,__pointers,non_lazy_symbol_pointers"
+ be_gas_section_t base = section & GAS_SECTION_TYPE_MASK;
+ be_gas_section_t flags = section & ~GAS_SECTION_TYPE_MASK;
+ const char *name;
+
+ if (current_section == section)
+ return;
+ current_section = section;
+
+ /* shortforms */
+ if (flags == 0) {
+ switch (base) {
+ case GAS_SECTION_TEXT: name = "text"; break;
+ case GAS_SECTION_DATA: name = "data"; break;
+ case GAS_SECTION_RODATA: name = "const"; break;
+ case GAS_SECTION_BSS: name = "data"; break;
+ case GAS_SECTION_CONSTRUCTORS: name = "mod_init_func"; break;
+ case GAS_SECTION_DESTRUCTORS: name = "mod_term_func"; break;
+ case GAS_SECTION_PIC_TRAMPOLINES: name = "section\t__IMPORT,__jump_table,symbol_stubs,self_modifying_code+pure_instructions,5"; break;
+ case GAS_SECTION_PIC_SYMBOLS: name = "section\t__IMPORT,__pointers,non_lazy_symbol_pointers"; break;
+ case GAS_SECTION_CSTRING: name = "cstring"; break;
+ 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_object_file_format >= 0
- && be_gas_object_file_format <= OBJECT_FILE_FORMAT_LAST);
- assert((int) section >= 0 && section <= GAS_SECTION_LAST);
- return text[be_gas_object_file_format][section];
+ if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) {
+ emit_section_macho(section);
+ 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 < 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();
}
void be_gas_emit_switch_section(be_gas_section_t section)
{
- if (current_section == section)
- return;
+ /* you have to produce a switch_section call with entity manually
+ * for comdat sections */
+ assert( !(section & GAS_SECTION_FLAG_COMDAT));
+
+ emit_section(section, NULL);
+}
+
+static 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;
- be_emit_char('\t');
- be_emit_string(get_section_name(section));
+ /* 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();
- current_section = section;
}
-static void emit_entity_visibility(const ir_entity *entity)
+static void emit_visibility(const ir_entity *entity)
{
- ir_visibility visibility = get_entity_visibility(entity);
- ir_linkage linkage = get_entity_linkage(entity);
+ ir_linkage linkage = get_entity_linkage(entity);
- if (visibility != ir_visibility_local) {
+ 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_emit_ident(get_entity_ld_ident(entity));
+ be_gas_emit_entity(entity);
be_emit_char('\n');
be_emit_write_line();
}
- if (linkage & IR_LINKAGE_WEAK) {
- if (! (linkage & IR_LINKAGE_MERGE)) {
- panic("Weak symbols only supported in combination with IR_LINKAGE_MERGE on this architecture");
- }
- be_emit_cstring(".weak ");
- be_emit_ident(get_entity_ld_ident(entity));
+
+ if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O
+ && (linkage & IR_LINKAGE_HIDDEN_USER)) {
+ be_emit_cstring("\t.no_dead_strip ");
+ be_gas_emit_entity(entity);
be_emit_char('\n');
be_emit_write_line();
}
}
-void be_gas_emit_function_prolog(ir_entity *entity, unsigned po2alignment)
+void be_gas_emit_function_prolog(const ir_entity *entity, unsigned po2alignment)
{
- const char *name = get_entity_ld_name(entity);
-
- be_gas_emit_switch_section(GAS_SECTION_TEXT);
+ 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_emit_string(name);
+ be_gas_emit_entity(entity);
be_emit_char('\n');
be_emit_write_line();
be_emit_irprintf("%u,%s,%u\n", po2alignment, fill_byte, maximum_skip);
be_emit_write_line();
}
- emit_entity_visibility(entity);
+ emit_visibility(entity);
switch (be_gas_object_file_format) {
case OBJECT_FILE_FORMAT_ELF:
be_emit_cstring("\t.type\t");
- be_emit_string(name);
+ be_gas_emit_entity(entity);
be_emit_cstring(", ");
be_emit_char(be_gas_elf_type_char);
be_emit_cstring("function\n");
break;
case OBJECT_FILE_FORMAT_COFF:
be_emit_cstring("\t.def\t");
- be_emit_string(name);
+ be_gas_emit_entity(entity);
be_emit_cstring(";");
if (get_entity_visibility(entity) == ir_visibility_local) {
be_emit_cstring("\t.scl\t3;");
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_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;
- const be_main_env_t *main_env;
-} be_gas_decl_env_t;
-
/************************************************************************/
/**
* @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:
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.
*/
return ".LE";
}
-void be_gas_emit_entity(ir_entity *entity)
-{
- if (entity->type == firm_code_type) {
- ir_label_t label = get_entity_label(entity);
- be_emit_string(be_gas_block_label_prefix());
- be_emit_irprintf("%lu", label);
- } else {
- be_emit_ident(get_entity_ld_ident(entity));
- }
-}
-
/**
* Return the tarval of an atomic initializer.
*
* @param 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);
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:
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;
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:
return;
default:
- panic("dump_atomic_init(): unsupported IR-node %+F", init);
+ panic("emit_atomic_init(): unsupported IR-node %+F", 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");
* @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(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;
-}
-
/**
* Dump a string constant.
* No checks are made!!
*
* @param ent The entity to dump.
*/
-static void dump_string_cst(const ir_entity *ent)
+static void emit_string_cst(const ir_entity *ent)
{
int i, len;
int output_len;
}
}
-static void dump_string_initializer(const ir_initializer_t *initializer)
+static void emit_string_initializer(const ir_initializer_t *initializer)
{
size_t i, len;
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) {
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;
}
}
-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)
{
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;
}
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);
}
}
panic("invalid ir_initializer kind found");
}
-static void dump_initializer(be_gas_decl_env_t *env, const ir_entity *entity)
+static void emit_initializer(be_gas_decl_env_t *env, const ir_entity *entity)
{
const ir_initializer_t *initializer = entity->initializer;
ir_type *type;
size_t k;
if (initializer_is_string_const(initializer)) {
- dump_string_initializer(initializer);
+ emit_string_initializer(initializer);
return;
}
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 elem_size = 1;
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);
elem_size = get_mode_size_bytes(get_irn_mode(vals[k].v.value));
} else {
elem_size = 0;
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 {
xfree(vals);
}
-static void dump_compound_graph_init(be_gas_decl_env_t *env,
+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_is_string_const(ent)) {
- dump_string_cst(ent);
+ if (entity_is_string_const(ent)) {
+ emit_string_cst(ent);
return;
}
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;
return alignment;
}
-static be_gas_section_t determine_section(be_gas_decl_env_t *env,
- const ir_entity *entity)
+static void emit_common(const ir_entity *entity)
{
- ir_type *owner = get_entity_owner(entity);
+ unsigned size = get_type_size_bytes(get_entity_type(entity));
+ unsigned alignment = get_effective_entity_alignment(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;
+ if (get_entity_linkage(entity) & IR_LINKAGE_WEAK) {
+ emit_weak(entity);
}
- panic("Couldn't determine section for %+F?!?", entity);
+ switch (be_gas_object_file_format) {
+ case OBJECT_FILE_FORMAT_MACH_O:
+ be_emit_cstring("\t.comm ");
+ be_gas_emit_entity(entity);
+ be_emit_irprintf(",%u,%u\n", size, log2_floor(alignment));
+ be_emit_write_line();
+ return;
+ case OBJECT_FILE_FORMAT_ELF:
+ be_emit_cstring("\t.comm ");
+ be_gas_emit_entity(entity);
+ be_emit_irprintf(",%u,%u\n", size, alignment);
+ be_emit_write_line();
+ return;
+ case OBJECT_FILE_FORMAT_COFF:
+ be_emit_cstring("\t.comm ");
+ be_gas_emit_entity(entity);
+ be_emit_irprintf(",%u # %u\n", size, alignment);
+ be_emit_write_line();
+ return;
+ }
+ panic("invalid object file format");
}
-static void emit_common(const ir_entity *ent)
+static void emit_local_common(const ir_entity *entity)
{
- const char *name = get_entity_ld_name(ent);
- unsigned size = get_type_size_bytes(get_entity_type(ent));
- unsigned alignment = get_effective_entity_alignment(ent);
+ unsigned size = get_type_size_bytes(get_entity_type(entity));
+ unsigned alignment = get_effective_entity_alignment(entity);
+
+ if (get_entity_linkage(entity) & IR_LINKAGE_WEAK) {
+ emit_weak(entity);
+ }
switch (be_gas_object_file_format) {
case OBJECT_FILE_FORMAT_MACH_O:
- be_emit_irprintf("\t.comm %s,%u,%u\n", name, size,
- log2_floor(alignment));
+ be_emit_cstring("\t.lcomm ");
+ be_gas_emit_entity(entity);
+ be_emit_irprintf(",%u,%u\n", size, log2_floor(alignment));
be_emit_write_line();
return;
case OBJECT_FILE_FORMAT_ELF:
- be_emit_irprintf("\t.comm %s,%u,%u\n", name, size, alignment);
+ be_emit_cstring("\t.local ");
+ be_gas_emit_entity(entity);
+ be_emit_cstring("\n");
+ be_emit_write_line();
+ be_emit_cstring("\t.comm ");
+ be_gas_emit_entity(entity);
+ be_emit_irprintf(",%u,%u\n", size, alignment);
be_emit_write_line();
return;
case OBJECT_FILE_FORMAT_COFF:
- be_emit_irprintf("\t.comm %s,%u # %u\n", name, size, alignment);
+ be_emit_cstring("\t.lcomm ");
+ be_gas_emit_entity(entity);
+ be_emit_irprintf(",%u # %u\n", size, alignment);
be_emit_write_line();
return;
}
panic("invalid object file format");
}
-static void dump_indirect_symbol(const ir_entity *entity, be_gas_section_t section)
+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_ident(get_entity_ld_ident(entity));
+ be_gas_emit_entity(entity);
be_emit_cstring(":\n");
be_emit_write_line();
be_emit_cstring("\t.indirect_symbol ");
}
}
+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
*/
-static void dump_global(be_gas_decl_env_t *env, const ir_entity *ent)
+static void emit_global(be_gas_decl_env_t *env, const ir_entity *entity)
{
- ir_type *type = get_entity_type(ent);
- ident *ld_ident = get_entity_ld_ident(ent);
- unsigned alignment = get_effective_entity_alignment(ent);
- be_gas_section_t section = determine_section(env, ent);
+ ir_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;
}
- /* block labels are already emittet in the code */
- if (type == firm_code_type)
- return;
-
- be_dbg_variable(ent);
- /* nothing to do for externally defined values */
- if (get_entity_visibility(ent) == ir_visibility_external)
- return;
+ be_dbg_variable(entity);
- if (!is_po2(alignment))
- panic("alignment not a power of 2");
+ if (section == GAS_SECTION_BSS) {
+ ir_visibility visibility = get_entity_visibility(entity);
- 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");
+ 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;
}
- emit_common(ent);
+ }
+
+ emit_visibility(entity);
+ if (visibility == ir_visibility_external) {
+ /* nothing to do for externally defined values */
return;
}
- be_gas_emit_switch_section(section);
+ if (!is_po2(alignment))
+ panic("alignment not a power of 2");
+
+ emit_section(section, entity);
if (section == GAS_SECTION_PIC_TRAMPOLINES
|| section == GAS_SECTION_PIC_SYMBOLS) {
- dump_indirect_symbol(ent, section);
+ emit_indirect_symbol(entity, section);
return;
}
if (alignment > 1) {
emit_align(alignment);
}
- emit_entity_visibility(ent);
if (be_gas_object_file_format == OBJECT_FILE_FORMAT_ELF
&& be_gas_emit_types) {
be_emit_cstring("\t.type\t");
- be_emit_ident(ld_ident);
+ be_gas_emit_entity(entity);
be_emit_cstring(", ");
be_emit_char(be_gas_elf_type_char);
- be_emit_cstring("object\n\t.size\t");
- be_emit_ident(ld_ident);
+ be_emit_cstring("object\n\t.size\t");\
+ be_gas_emit_entity(entity);
be_emit_irprintf(", %u\n", get_type_size_bytes(type));
}
- be_emit_ident(ld_ident);
- be_emit_cstring(":\n");
- be_emit_write_line();
- if (ent->initializer != NULL) {
- dump_initializer(env, ent);
- } else if(entity_has_compound_ent_values(ent)) {
- dump_compound_graph_init(env, ent);
- } else {
- /* uninitialized */
+ if (get_id_str(ld_ident)[0] != '\0') {
+ be_gas_emit_entity(entity);
+ be_emit_cstring(":\n");
+ be_emit_write_line();
+ }
+
+ if (entity_is_null(entity)) {
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 {
+ assert(entity->initializer != NULL);
+ emit_initializer(env, entity);
}
}
* @param gt a global like type, either the global or the TLS one
* @param env an environment
*/
-static void be_gas_dump_globals(ir_type *gt, be_gas_decl_env_t *env)
+static void be_gas_emit_globals(ir_type *gt, be_gas_decl_env_t *env)
{
int i, n = get_compound_n_members(gt);
for (i = 0; i < n; i++) {
ir_entity *ent = get_compound_member(gt, i);
- dump_global(env, ent);
+ emit_global(env, ent);
}
}
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);
+ 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
projects / libfirm / blobdiff