* @brief Dumps global variables and constants as gas assembler.
* @author Christian Wuerdig, Matthias Braun
* @date 04.11.2005
- * @version $Id$
*/
#include "config.h"
#include "be_t.h"
#include "beemitter.h"
-#include "be_dbgout.h"
+#include "bedwarf.h"
/** by default, we generate assembler code for the Linux gas */
object_file_format_t be_gas_object_file_format = OBJECT_FILE_FORMAT_ELF;
case GAS_SECTION_DEBUG_ABBREV: name = "section __DWARF,__debug_abbrev,regular,debug"; break;
case GAS_SECTION_DEBUG_LINE: name = "section __DWARF,__debug_line,regular,debug"; break;
case GAS_SECTION_DEBUG_PUBNAMES: name = "section __DWARF,__debug_pubnames,regular,debug"; break;
+ case GAS_SECTION_DEBUG_FRAME: name = "section __DWARF,__debug_frame,regular,debug"; break;
default: panic("unsupported scetion type 0x%X", section);
}
be_emit_irprintf("\t.%s\n", name);
case GAS_SECTION_CSTRING: name = "section __TEXT,__const_coal,coalesced"; break;
default: panic("unsupported scetion type 0x%X", section);
}
+ } else if (flags & GAS_SECTION_FLAG_TLS) {
+ panic("thread local storage not supported on macho (section 0x%X)", section);
} else {
- panic("unsupported section type 0x%X\n", section);
+ panic("unsupported section type 0x%X", section);
}
}
"debug_abbrev",
"debug_line",
"debug_pubnames"
+ "debug_frame",
};
if (current_section == section && !(section & GAS_SECTION_FLAG_COMDAT))
{ "debug_abbrev", "progbits", "" },
{ "debug_line", "progbits", "" },
{ "debug_pubnames", "progbits", "" },
+ { "debug_frame", "progbits", "" },
};
if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) {
static bool entity_is_null(const ir_entity *entity)
{
- if (entity->initializer != NULL) {
- return initializer_is_null(entity->initializer);
- } else if (entity_has_compound_ent_values(entity)) {
- /* I'm too lazy to implement this case as compound graph paths will be
- * remove anyway in the future */
- return false;
- }
- /* uninitialized, NULL is fine */
- return true;
+ ir_initializer_t *initializer = get_entity_initializer(entity);
+ return initializer == NULL || initializer_is_null(initializer);
}
static bool is_comdat(const ir_entity *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))
+ && entity_is_string_const(entity))
return GAS_SECTION_CSTRING;
return GAS_SECTION_RODATA;
static void emit_visibility(const ir_entity *entity)
{
- ir_linkage linkage = get_entity_linkage(entity);
+ ir_linkage const linkage = get_entity_linkage(entity);
- if (get_entity_linkage(entity) & IR_LINKAGE_WEAK) {
+ if (linkage & 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 ");
+ } else if (get_entity_visibility(entity) == ir_visibility_external
+ && entity_has_definition(entity)) {
+ be_emit_cstring("\t.globl ");
be_gas_emit_entity(entity);
be_emit_char('\n');
be_emit_write_line();
}
}
-void be_gas_emit_function_prolog(const ir_entity *entity, unsigned po2alignment)
+void be_gas_emit_function_prolog(const ir_entity *entity, unsigned po2alignment, const parameter_dbg_info_t *parameter_infos)
{
- be_gas_section_t section = determine_section(NULL, entity);
+ be_gas_section_t section;
+
+ be_dwarf_method_before(entity, parameter_infos);
+
+ section = determine_section(NULL, entity);
emit_section(section, entity);
/* write the begin line (makes the life easier for scripts parsing the
* assembler) */
- be_emit_write_line();
be_emit_cstring("# -- Begin ");
be_gas_emit_entity(entity);
be_emit_char('\n');
be_gas_emit_entity(entity);
be_emit_cstring(":\n");
be_emit_write_line();
+
+ be_dwarf_method_begin();
}
void be_gas_emit_function_epilog(const ir_entity *entity)
{
+ be_dwarf_method_end();
+
if (be_gas_object_file_format == OBJECT_FILE_FORMAT_ELF) {
be_emit_cstring("\t.size\t");
be_gas_emit_entity(entity);
be_gas_emit_entity(entity);
be_emit_char('\n');
be_emit_write_line();
+
+ be_emit_char('\n');
+ be_emit_write_line();
}
/**
} v;
} normal_or_bitfield;
-static int is_type_variable_size(ir_type *type)
-{
- (void) type;
- /* TODO */
- return 0;
-}
-
static size_t get_initializer_size(const ir_initializer_t *initializer,
ir_type *type)
{
case IR_INITIALIZER_NULL:
return get_type_size_bytes(type);
case IR_INITIALIZER_COMPOUND:
- if (!is_type_variable_size(type)) {
- return get_type_size_bytes(type);
+ if (is_Array_type(type)) {
+ if (is_array_variable_size(type)) {
+ ir_type *element_type = get_array_element_type(type);
+ unsigned element_size = get_type_size_bytes(element_type);
+ unsigned element_align
+ = get_type_alignment_bytes(element_type);
+ unsigned misalign = element_size % element_align;
+ size_t n_inits
+ = get_initializer_compound_n_entries(initializer);
+ element_size += element_align - misalign;
+ return n_inits * element_size;
+ } else {
+ return get_type_size_bytes(type);
+ }
} else {
- size_t n_entries
- = get_initializer_compound_n_entries(initializer);
- size_t i;
- unsigned initializer_size = get_type_size_bytes(type);
- for (i = 0; i < n_entries; ++i) {
- ir_entity *entity = get_compound_member(type, i);
- ir_type *type = get_entity_type(entity);
-
- const ir_initializer_t *sub_initializer
- = get_initializer_compound_value(initializer, i);
-
- unsigned offset = get_entity_offset(entity);
- unsigned size = get_initializer_size(sub_initializer, type);
-
- if (offset + size > initializer_size) {
- initializer_size = offset + size;
- }
+ assert(is_compound_type(type));
+ size_t size = get_type_size_bytes(type);
+ if (is_compound_variable_size(type)) {
+ /* last initializer has to be an array of variable size */
+ size_t l = get_initializer_compound_n_entries(initializer)-1;
+ const ir_initializer_t *last
+ = get_initializer_compound_value(initializer, l);
+ const ir_entity *last_ent = get_compound_member(type, l);
+ ir_type *last_type = get_entity_type(last_ent);
+ assert(is_array_variable_size(last_type));
+ size += get_initializer_size(last, last_type);
}
- return initializer_size;
+ return size;
}
}
void be_gas_emit_entity(const ir_entity *entity)
{
- if (entity->type == firm_code_type) {
+ if (entity->type == get_code_type()) {
ir_label_t label = get_entity_label(entity);
be_emit_irprintf("%s_%lu", be_gas_get_private_prefix(), label);
return;
void be_gas_emit_block_name(const ir_node *block)
{
- if (has_Block_entity(block)) {
- ir_entity *entity = get_Block_entity(block);
+ ir_entity *entity = get_Block_entity(block);
+ if (entity != NULL) {
be_gas_emit_entity(entity);
} else {
be_emit_irprintf("%s%ld", be_gas_get_private_prefix(), get_irn_node_nr(block));
ir_linkage linkage = get_entity_linkage(entity);
/* block labels are already emittet in the code */
- if (type == firm_code_type)
+ if (type == get_code_type())
return;
- /* we already emitted all methods. Except for the trampolines which
- * the assembler/linker generates */
+ /* we already emitted all methods with graphs in other functions like
+ * be_gas_emit_function_prolog(). All others don't need to be emitted.
+ */
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;
}
- be_dbg_variable(entity);
+ be_dwarf_variable(entity);
if (section == GAS_SECTION_BSS) {
switch (visibility) {
case ir_visibility_private:
emit_local_common(entity);
return;
- case ir_visibility_default:
+ case ir_visibility_external:
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_visibility(entity);
- if (visibility == ir_visibility_external) {
- /* nothing to do for externally defined values */
- return;
- }
if (!is_po2(alignment))
panic("alignment not a power of 2");
return;
}
+ /* nothing left to do without an initializer */
+ if (!entity_has_definition(entity))
+ return;
+
/* alignment */
if (alignment > 1) {
emit_align(alignment);
}
if (entity_is_null(entity)) {
+ /* we should use .space for stuff in the bss segment */
unsigned size = get_type_size_bytes(type);
if (size > 0) {
be_emit_irprintf("\t.space %u, 0\n", get_type_size_bytes(type));
}
}
-void emit_jump_table(const ir_node *node, long default_pn, ir_entity *entity,
- get_cfop_target_func get_cfop_target)
+void be_emit_jump_table(const ir_node *node, const ir_switch_table *table,
+ ir_entity *entity, get_cfop_target_func get_cfop_target)
{
- long switch_max = LONG_MIN;
- ir_node *default_block = NULL;
- unsigned long length;
- const ir_edge_t *edge;
- unsigned i;
- ir_node **table;
-
- /* go over all proj's and collect them */
+ unsigned n_outs = arch_get_irn_n_outs(node);
+ const ir_node **targets = XMALLOCNZ(const ir_node*, n_outs);
+ size_t n_entries = ir_switch_table_get_n_entries(table);
+ unsigned long length = 0;
+ size_t e;
+ const ir_edge_t *edge;
+ unsigned i;
+ const ir_node **labels;
+
+ /* go over all proj's and collect their jump targets */
foreach_out_edge(node, edge) {
- ir_node *proj = get_edge_src_irn(edge);
- long pn = get_Proj_proj(proj);
-
- /* check for default proj */
- if (pn == default_pn) {
- assert(default_block == NULL); /* more than 1 default_pn? */
- default_block = get_cfop_target(proj);
- } else {
- switch_max = pn > switch_max ? pn : switch_max;
+ ir_node *proj = get_edge_src_irn(edge);
+ long pn = get_Proj_proj(proj);
+ ir_node *target = get_cfop_target(proj);
+ assert(targets[pn] == NULL);
+ targets[pn] = target;
+ }
+
+ /* go over table to determine max value (note that we normalized the
+ * ranges so that the minimum is 0) */
+ for (e = 0; e < n_entries; ++e) {
+ const ir_switch_table_entry *entry
+ = ir_switch_table_get_entry_const(table, e);
+ ir_tarval *max = entry->max;
+ unsigned long val;
+ if (entry->pn == 0)
+ continue;
+ if (!tarval_is_long(max))
+ panic("switch case overflow (%+F)", node);
+ val = (unsigned long) get_tarval_long(max);
+ if (val > length) {
+ length = val;
}
}
- assert(switch_max > LONG_MIN);
- length = (unsigned long) switch_max + 1;
/* the 16000 isn't a real limit of the architecture. But should protect us
* from seamingly endless compiler runs */
if (length > 16000) {
/* switch lowerer should have broken this monster to pieces... */
- panic("too large switch encountered");
+ panic("too large switch encountered (%+F)", node);
+ }
+ ++length;
+
+ labels = XMALLOCNZ(const ir_node*, length);
+ for (e = 0; e < n_entries; ++e) {
+ const ir_switch_table_entry *entry
+ = ir_switch_table_get_entry_const(table, e);
+ ir_tarval *min = entry->min;
+ ir_tarval *max = entry->max;
+ const ir_node *target = targets[entry->pn];
+ assert(entry->pn < (long)n_outs);
+ if (min == max) {
+ unsigned long val = (unsigned long)get_tarval_long(max);
+ labels[val] = target;
+ } else {
+ unsigned long min_val;
+ unsigned long max_val;
+ unsigned long i;
+ if (!tarval_is_long(min))
+ panic("switch case overflow (%+F)", node);
+ min_val = (unsigned long)get_tarval_long(min);
+ max_val = (unsigned long)get_tarval_long(max);
+ assert(min_val <= max_val);
+ for (i = min_val; i <= max_val; ++i) {
+ labels[i] = target;
+ }
+ }
}
- table = XMALLOCNZ(ir_node*, length);
- foreach_out_edge(node, edge) {
- ir_node *proj = get_edge_src_irn(edge);
- long pn = get_Proj_proj(proj);
- if (pn == default_pn)
- continue;
-
- table[pn] = get_cfop_target(proj);
+ /* emit table */
+ if (entity != NULL) {
+ be_gas_emit_switch_section(GAS_SECTION_RODATA);
+ be_emit_cstring("\t.align 4\n");
+ be_gas_emit_entity(entity);
+ be_emit_cstring(":\n");
}
- /* emit table */
- be_gas_emit_switch_section(GAS_SECTION_RODATA);
- be_emit_cstring("\t.align 4\n");
- be_gas_emit_entity(entity);
- be_emit_cstring(":\n");
for (i = 0; i < length; ++i) {
- ir_node *block = table[i];
+ const ir_node *block = labels[i];
if (block == NULL)
- block = default_block;
+ block = targets[0];
be_emit_cstring("\t.long ");
be_gas_emit_block_name(block);
be_emit_char('\n');
be_emit_write_line();
}
- be_gas_emit_switch_section(GAS_SECTION_TEXT);
- xfree(table);
+ if (entity != NULL)
+ be_gas_emit_switch_section(GAS_SECTION_TEXT);
+
+ xfree(labels);
+ xfree(targets);
}
static void emit_global_asms(void)
void be_gas_begin_compilation_unit(const be_main_env_t *env)
{
- be_dbg_open();
- be_dbg_unit_begin(env->cup_name);
- be_dbg_types();
+ be_dwarf_open();
+ be_dwarf_unit_begin(env->cup_name);
emit_global_asms();
}
{
emit_global_decls(env);
- be_dbg_unit_end();
- be_dbg_close();
+ be_dwarf_unit_end();
+ be_dwarf_close();
}
projects / libfirm / blobdiff