* @date 04.11.2005
* @version $Id$
*/
-#ifdef HAVE_CONFIG_H
#include "config.h"
-#endif
#include "begnuas.h"
#include "tv.h"
#include "irnode.h"
#include "irprog.h"
-#include "pdeq.h"
#include "entity_t.h"
#include "error.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
*/
-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",
".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 */
+ { /* 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.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",
- 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, /* 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');
current_section = section;
}
-void be_gas_emit_function_prolog(ir_entity *entity, unsigned alignment)
+static void emit_entity_visibility(const ir_entity *entity)
+{
+ ir_linkage linkage = get_entity_linkage(entity);
+
+ if (! (linkage & IR_LINKAGE_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);
- be_emit_cstring(";\t.scl\t2;\t.type\t32;\t.endef\n");
+ be_emit_cstring(";");
+ if (get_entity_linkage(entity) & IR_LINKAGE_LOCAL) {
+ be_emit_cstring("\t.scl\t3;");
+ } else {
+ 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);
{
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(", .-");
* 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;
/************************************************************************/
return;
case 12:
- be_emit_irprintf("0x%02x%02x%02x%02x%02x%02x%02x%02x"
- "%02x%02x%02x%02x", get_tarval_sub_bits(tv, 11),
- get_tarval_sub_bits(tv, 10), get_tarval_sub_bits(tv, 9),
- get_tarval_sub_bits(tv, 8), get_tarval_sub_bits(tv, 7),
- get_tarval_sub_bits(tv, 6), get_tarval_sub_bits(tv, 5),
- get_tarval_sub_bits(tv, 4), get_tarval_sub_bits(tv, 3),
- get_tarval_sub_bits(tv, 2), get_tarval_sub_bits(tv, 1),
- get_tarval_sub_bits(tv, 0));
+ /* Beware: Mixed endian output! One little endian number emitted as
+ * three longs. Each long initializer is written in big endian. */
+ be_emit_irprintf(
+ "\t.long\t0x%02x%02x%02x%02x\n"
+ "\t.long\t0x%02x%02x%02x%02x\n"
+ "\t.long\t0x%02x%02x%02x%02x",
+ get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2),
+ get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0),
+ get_tarval_sub_bits(tv, 7), get_tarval_sub_bits(tv, 6),
+ get_tarval_sub_bits(tv, 5), get_tarval_sub_bits(tv, 4),
+ get_tarval_sub_bits(tv, 11), get_tarval_sub_bits(tv, 10),
+ get_tarval_sub_bits(tv, 9), get_tarval_sub_bits(tv, 8)
+ );
return;
case 16:
- be_emit_irprintf("0x%02x%02x%02x%02x%02x%02x%02x%02x"
- "%02x%02x%02x%02x%02x%02x%02x%02x",
+ be_emit_irprintf(
+ "\t.long\t0x%02x%02x%02x%02x0x%02x%02x%02x%02x0x%02x%02x%02x%02x0x%02x%02x%02x%02x",
get_tarval_sub_bits(tv, 15), get_tarval_sub_bits(tv, 16),
get_tarval_sub_bits(tv, 13), get_tarval_sub_bits(tv, 12),
get_tarval_sub_bits(tv, 11), get_tarval_sub_bits(tv, 10),
- get_tarval_sub_bits(tv, 9), get_tarval_sub_bits(tv, 8),
- get_tarval_sub_bits(tv, 7), get_tarval_sub_bits(tv, 6),
- get_tarval_sub_bits(tv, 5), get_tarval_sub_bits(tv, 4),
- get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2),
- get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
+ get_tarval_sub_bits(tv, 9), get_tarval_sub_bits(tv, 8),
+ get_tarval_sub_bits(tv, 7), get_tarval_sub_bits(tv, 6),
+ get_tarval_sub_bits(tv, 5), get_tarval_sub_bits(tv, 4),
+ get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2),
+ get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0)
+ );
return;
}
- panic("Can't dump a tarval with %d bytes\n", 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) {
+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%u", 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));
+ }
}
/**
case symconst_enum_const:
return get_enumeration_value(get_SymConst_enum(init));
- case symconst_label:
- return NULL;
-
default:
return NULL;
}
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);
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;
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");
}
return;
- case iro_Add:
- if (!mode_is_int(mode) && !mode_is_reference(mode)) {
- panic("Constant must be int or pointer for '+' to work");
- }
- do_dump_atomic_init(env, get_Add_left(init));
- be_emit_cstring(" + ");
- do_dump_atomic_init(env, get_Add_right(init));
- return;
-
- case iro_Sub:
- if (!mode_is_int(mode) && !mode_is_reference(mode)) {
- panic("Constant must be int or pointer for '-' to work");
- }
- do_dump_atomic_init(env, get_Sub_left(init));
- be_emit_cstring(" - ");
- do_dump_atomic_init(env, get_Sub_right(init));
- return;
-
- case iro_Mul:
- if (!mode_is_int(mode) && !mode_is_reference(mode)) {
- panic("Constant must be int or pointer for '*' to work");
- }
- do_dump_atomic_init(env, get_Mul_left(init));
- be_emit_cstring(" * ");
- do_dump_atomic_init(env, get_Mul_right(init));
- return;
+ case iro_Add:
+ if (!mode_is_int(mode) && !mode_is_reference(mode)) {
+ panic("Constant must be int or pointer for '+' to work");
+ }
+ do_dump_atomic_init(env, get_Add_left(init));
+ be_emit_cstring(" + ");
+ do_dump_atomic_init(env, get_Add_right(init));
+ return;
- default:
- assert(0 && "dump_atomic_init(): unknown IR-node");
+ case iro_Sub:
+ if (!mode_is_int(mode) && !mode_is_reference(mode)) {
+ panic("Constant must be int or pointer for '-' to work");
+ }
+ do_dump_atomic_init(env, get_Sub_left(init));
+ be_emit_cstring(" - ");
+ do_dump_atomic_init(env, get_Sub_right(init));
+ return;
+
+ case iro_Mul:
+ if (!mode_is_int(mode) && !mode_is_reference(mode)) {
+ panic("Constant must be int or pointer for '*' to work");
+ }
+ do_dump_atomic_init(env, get_Mul_left(init));
+ be_emit_cstring(" * ");
+ do_dump_atomic_init(env, get_Mul_right(init));
+ return;
+
+ case iro_Unknown:
+ be_emit_cstring("0");
+ return;
+
+ default:
+ panic("dump_atomic_init(): unsupported IR-node %+F", init);
}
}
break;
case 2:
- be_emit_cstring("\t.word\t");
+ be_emit_cstring("\t.short\t");
break;
case 4:
break;
default:
- panic("Try to dump a type with %u bytes\n", (unsigned) size);
+ panic("Try to dump a type with %u bytes", (unsigned)size);
}
}
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')
* @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);
/* 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) {
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;
}
/**
*
* @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;
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);
}
}
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);
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);
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");
}
int value_len;
int j;
- switch(get_initializer_kind(initializer)) {
+ switch (get_initializer_kind(initializer)) {
case IR_INITIALIZER_NULL:
return;
case IR_INITIALIZER_TARVAL:
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);
panic("bitfield initializer is compound");
}
if (tv == NULL) {
- panic("Couldn't get numeric value for bitfield initializer\n");
+ panic("Couldn't get numeric value for bitfield initializer");
}
+ tv = tarval_convert_to(tv, get_type_mode(type));
/* normalize offset */
vals += offset_bits >> 3;
{
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: {
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;
}
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;
}
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);
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);
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,
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;
}
* 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;
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));
/* 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;
}
* 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) {
assert(offset_bits >= 0);
if (offset_bits != 0 ||
- (value_len != 8 && value_len != 16 && value_len != 32 && value_len != 64)) {
+ (value_len != 8 && value_len != 16 && value_len != 32 && value_len != 64)) {
tarval *tv = get_atomic_init_tv(value);
unsigned char curr_bits, last_bits = 0;
if (tv == NULL) {
- panic("Couldn't get numeric value for bitfield initializer '%s'\n",
- get_entity_ld_name(ent));
+ panic("Couldn't get numeric value for bitfield initializer '%s'",
+ get_entity_ld_name(ent));
}
/* normalize offset */
offset += offset_bits >> 3;
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);
/* 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(".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);
+ ir_linkage linkage = get_entity_linkage(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 (linkage & IR_LINKAGE_EXTERN)
+ 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)) {
+ 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 (!emit_as_common) {
+ 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(":\n");
- be_emit_write_line();
+ 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 (variability == variability_uninitialized) {
- if (emit_as_common) {
- switch (be_gas_flavour) {
- case GAS_FLAVOUR_ELF:
- case GAS_FLAVOUR_MACH_O:
- case GAS_FLAVOUR_YASM:
- be_emit_irprintf("\t.comm %s,%u,%u\n",
- get_id_str(ld_ident), get_type_size_bytes(type), align);
- be_emit_write_line();
- break;
- case GAS_FLAVOUR_MINGW:
- be_emit_irprintf("\t.comm %s,%u # %u\n",
- get_id_str(ld_ident), get_type_size_bytes(type), align);
- be_emit_write_line();
- break;
- }
- } else if (section == GAS_SECTION_PIC_TRAMPOLINES) {
- if (be_gas_flavour == GAS_FLAVOUR_MACH_O) {
- be_emit_cstring("\t.indirect_symbol ");
- be_emit_ident(get_entity_ident(ent));
- be_emit_char('\n');
- be_emit_write_line();
- be_emit_cstring("\thlt ; hlt ; hlt ; hlt ; hlt\n");
- be_emit_write_line();
- } else {
- panic("PIC trampolines not yet supported in this gas mode");
- }
- } else {
- be_emit_irprintf("\t.space %u\n", get_type_size_bytes(type));
- be_emit_write_line();
- }
+ if (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();
}
}
*
* @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_CTOR;
- be_gas_dump_globals(get_constructors_type(), &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();
}
}
projects / libfirm / blobdiff