/*
- * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
- *
* This file is part of libFirm.
- *
- * This file may be distributed and/or modified under the terms of the
- * GNU General Public License version 2 as published by the Free Software
- * Foundation and appearing in the file LICENSE.GPL included in the
- * packaging of this file.
- *
- * Licensees holding valid libFirm Professional Edition licenses may use
- * this file in accordance with the libFirm Commercial License.
- * Agreement provided with the Software.
- *
- * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
- * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE.
+ * Copyright (C) 2012 University of Karlsruhe.
*/
/**
* @brief Dumps global variables and constants as gas assembler.
* @author Christian Wuerdig, Matthias Braun
* @date 04.11.2005
- * @version $Id$
*/
#include "config.h"
#include "tv.h"
#include "irnode.h"
#include "irprog.h"
-#include "pdeq.h"
#include "entity_t.h"
#include "error.h"
+#include "util.h"
+#include "execfreq.h"
#include "be_t.h"
+#include "bearch.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;
+elf_variant_t be_gas_elf_variant = ELF_VARIANT_NORMAL;
bool be_gas_emit_types = true;
-char be_gas_elf_type_char = '@';
+char be_gas_elf_type_char = '@';
static be_gas_section_t current_section = (be_gas_section_t) -1;
+static pmap *block_numbers;
+static unsigned next_block_nr;
/**
- * 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",
- 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"
+ 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;
+ case GAS_SECTION_DEBUG_INFO: name = "section __DWARF,__debug_info,regular,debug"; break;
+ 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);
+ }
+ } 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 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", section);
+ }
+ be_emit_irprintf("\t.%s\n", name);
+ be_emit_write_line();
+}
+
+static void emit_section_sparc(be_gas_section_t section, const ir_entity *entity)
+{
+ be_gas_section_t base = section & GAS_SECTION_TYPE_MASK;
+ be_gas_section_t flags = section & ~GAS_SECTION_TYPE_MASK;
+ static const char *const basename[GAS_SECTION_LAST+1] = {
+ "text",
+ "data",
+ "rodata",
+ "bss",
+ "ctors",
+ "dtors",
+ NULL, /* cstring */
+ NULL, /* pic trampolines */
+ NULL, /* pic symbols */
+ "debug_info",
+ "debug_abbrev",
+ "debug_line",
+ "debug_pubnames"
+ "debug_frame",
};
- 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 (current_section == section && !(section & GAS_SECTION_FLAG_COMDAT))
+ return;
+ current_section = section;
+
+ be_emit_cstring("\t.section\t\".");
+
+ /* Part1: section-name */
+ if (flags & GAS_SECTION_FLAG_TLS)
+ be_emit_char('t');
+ assert(base < (be_gas_section_t)ARRAY_SIZE(basename));
+ be_emit_string(basename[base]);
+
+ if (flags & GAS_SECTION_FLAG_COMDAT) {
+ be_emit_char('.');
+ be_gas_emit_entity(entity);
+ }
+ be_emit_char('"');
+
+ /* for the simple sections we're done here */
+ if (flags == 0)
+ goto end;
+
+ be_emit_cstring(",#alloc");
+
+ switch (base) {
+ case GAS_SECTION_TEXT: be_emit_cstring(",#execinstr"); break;
+ case GAS_SECTION_DATA:
+ case GAS_SECTION_BSS: be_emit_cstring(",#write"); break;
+ default:
+ /* nothing */
+ break;
+ }
+ if (flags & GAS_SECTION_FLAG_TLS) {
+ be_emit_cstring(",#tls");
+ }
+
+end:
+ be_emit_char('\n');
+ be_emit_write_line();
}
-void be_gas_emit_switch_section(be_gas_section_t section)
+static void emit_section(be_gas_section_t section, const ir_entity *entity)
{
- if (current_section == section)
+ be_gas_section_t base = section & GAS_SECTION_TYPE_MASK;
+ be_gas_section_t flags = section & ~GAS_SECTION_TYPE_MASK;
+ const char *f;
+ static const struct {
+ const char *name;
+ const char *type;
+ const char *flags;
+ } sectioninfos[GAS_SECTION_LAST+1] = {
+ { "text", "progbits", "ax" },
+ { "data", "progbits", "aw" },
+ { "rodata", "progbits", "a" },
+ { "bss", "nobits", "aw" },
+ { "ctors", "progbits", "aw" },
+ { "dtors", "progbits", "aw" },
+ { NULL, NULL, NULL }, /* cstring */
+ { NULL, NULL, NULL }, /* pic trampolines */
+ { NULL, NULL, NULL }, /* pic symbols */
+ { "debug_info", "progbits", "" },
+ { "debug_abbrev", "progbits", "" },
+ { "debug_line", "progbits", "" },
+ { "debug_pubnames", "progbits", "" },
+ { "debug_frame", "progbits", "" },
+ };
+
+ if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) {
+ emit_section_macho(section);
+ return;
+ } else if(be_gas_elf_variant == ELF_VARIANT_SPARC) {
+ emit_section_sparc(section, entity);
+ return;
+ }
+
+ if (current_section == section && !(section & GAS_SECTION_FLAG_COMDAT))
return;
+ current_section = section;
- be_emit_char('\t');
- be_emit_string(get_section_name(section));
+ /* shortforms */
+ if (flags == 0) {
+ switch (base) {
+ case GAS_SECTION_TEXT:
+ be_emit_cstring("\t.text\n");
+ be_emit_write_line();
+ return;
+ case GAS_SECTION_DATA:
+ be_emit_cstring("\t.data\n");
+ be_emit_write_line();
+ return;
+ case GAS_SECTION_RODATA:
+ be_emit_cstring("\t.section\t.rodata\n");
+ be_emit_write_line();
+ return;
+ case GAS_SECTION_BSS:
+ be_emit_cstring("\t.bss\n");
+ be_emit_write_line();
+ return;
+ default:
+ break;
+ }
+ }
+
+ assert(base < (be_gas_section_t) ARRAY_SIZE(sectioninfos));
+ be_emit_cstring("\t.section\t.");
+ /* section name */
+ if (flags & GAS_SECTION_FLAG_TLS)
+ be_emit_char('t');
+ be_emit_string(sectioninfos[base].name);
+ if (flags & GAS_SECTION_FLAG_COMDAT) {
+ be_emit_char('.');
+ be_gas_emit_entity(entity);
+ }
+
+ /* section flags */
+ be_emit_cstring(",\"");
+ for (f = sectioninfos[base].flags; *f != '\0'; ++f) {
+ be_emit_char(*f);
+ }
+ if (flags & GAS_SECTION_FLAG_TLS)
+ be_emit_char('T');
+ if (flags & GAS_SECTION_FLAG_COMDAT)
+ be_emit_char('G');
+
+ /* section type */
+ if (be_gas_object_file_format != OBJECT_FILE_FORMAT_COFF) {
+ be_emit_cstring("\",");
+ be_emit_char(be_gas_elf_type_char);
+ be_emit_string(sectioninfos[base].type);
+ }
+
+ if (flags & GAS_SECTION_FLAG_COMDAT) {
+ be_emit_char(',');
+ be_gas_emit_entity(entity);
+ be_emit_cstring(",comdat");
+ }
be_emit_char('\n');
be_emit_write_line();
- current_section = section;
}
-static void emit_entity_visibility(const ir_entity *entity)
+
+
+void be_gas_emit_switch_section(be_gas_section_t section)
+{
+ /* 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 ir_tarval *get_initializer_tarval(const ir_initializer_t *initializer)
+{
+ if (initializer->kind == IR_INITIALIZER_TARVAL)
+ return initializer->tarval.value;
+ if (initializer->kind == IR_INITIALIZER_CONST) {
+ ir_node *node = initializer->consti.value;
+ if (is_Const(node)) {
+ return get_Const_tarval(node);
+ }
+ }
+ return get_tarval_undefined();
+}
+
+static bool initializer_is_string_const(const ir_initializer_t *initializer)
+{
+ size_t i, len;
+ bool found_printable = false;
+
+ if (initializer->kind != IR_INITIALIZER_COMPOUND)
+ return false;
+
+ len = initializer->compound.n_initializers;
+ if (len < 1)
+ return false;
+ for (i = 0; i < len; ++i) {
+ int c;
+ ir_tarval *tv;
+ ir_mode *mode;
+ ir_initializer_t *sub_initializer
+ = initializer->compound.initializers[i];
+
+ tv = get_initializer_tarval(sub_initializer);
+ if (!tarval_is_constant(tv))
+ return false;
+
+ mode = get_tarval_mode(tv);
+ if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
+ return false;
+
+ c = get_tarval_long(tv);
+ if (isgraph(c) || isspace(c))
+ found_printable = true;
+ else if (c != 0)
+ return false;
+
+ if (i == len - 1 && c != '\0')
+ return false;
+ }
+
+ return found_printable;
+}
+
+static bool initializer_is_null(const ir_initializer_t *initializer)
+{
+ switch (initializer->kind) {
+ case IR_INITIALIZER_NULL:
+ return true;
+ case IR_INITIALIZER_TARVAL: {
+ ir_tarval *tv = initializer->tarval.value;
+ return tarval_is_null(tv);
+ }
+ case IR_INITIALIZER_CONST: {
+ ir_node *value = initializer->consti.value;
+ if (!is_Const(value))
+ return false;
+ return is_Const_null(value);
+ }
+ case IR_INITIALIZER_COMPOUND: {
+ size_t i;
+ for (i = 0; i < initializer->compound.n_initializers; ++i) {
+ ir_initializer_t *subinitializer
+ = initializer->compound.initializers[i];
+ if (!initializer_is_null(subinitializer))
+ return false;
+ }
+ return true;
+ }
+ }
+ panic("invalid initializer in initializer_is_null");
+}
+
+/**
+ * Determine if an entity is a string constant
+ * @param ent The entity
+ * @return 1 if it is a string constant, 0 otherwise
+ */
+static int entity_is_string_const(const ir_entity *ent)
+{
+ ir_type *type, *element_type;
+ ir_mode *mode;
+
+ 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);
+ }
+
+ return 0;
+}
+
+static bool entity_is_null(const ir_entity *entity)
+{
+ ir_initializer_t *initializer = get_entity_initializer(entity);
+ return initializer == NULL || initializer_is_null(initializer);
+}
+
+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;
+}
- if (! (linkage & IR_LINKAGE_LOCAL)) {
- be_emit_cstring(".globl ");
- be_emit_ident(get_entity_ld_ident(entity));
+static be_gas_section_t determine_section(be_gas_decl_env_t *env,
+ const ir_entity *entity)
+{
+ ir_type *owner = get_entity_owner(entity);
+
+ if (owner == get_segment_type(IR_SEGMENT_GLOBAL)) {
+ be_gas_section_t section = determine_basic_section(entity);
+ if (is_comdat(entity))
+ section |= GAS_SECTION_FLAG_COMDAT;
+ return section;
+ } else if (env != NULL && owner == env->main_env->pic_symbols_type) {
+ return GAS_SECTION_PIC_SYMBOLS;
+ } else if (env != NULL && owner == env->main_env->pic_trampolines_type) {
+ return GAS_SECTION_PIC_TRAMPOLINES;
+ } else if (owner == get_segment_type(IR_SEGMENT_CONSTRUCTORS)) {
+ return GAS_SECTION_CONSTRUCTORS;
+ } else if (owner == get_segment_type(IR_SEGMENT_DESTRUCTORS)) {
+ return GAS_SECTION_DESTRUCTORS;
+ } else if (owner == get_segment_type(IR_SEGMENT_THREAD_LOCAL)) {
+ be_gas_section_t section = determine_basic_section(entity);
+ if (is_comdat(entity))
+ section |= GAS_SECTION_FLAG_COMDAT;
+
+ return section | GAS_SECTION_FLAG_TLS;
+ }
+
+ /* the java frontend keeps some functions inside classes */
+ if (is_Class_type(owner)) {
+ return determine_basic_section(entity);
+ }
+
+ panic("Couldn't determine section for %+F?!?", entity);
+}
+
+static void emit_weak(const ir_entity *entity)
+{
+ if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) {
+ be_emit_cstring("\t.weak_reference ");
+ } else {
+ be_emit_cstring("\t.weak ");
+ }
+ be_gas_emit_entity(entity);
+ be_emit_char('\n');
+ be_emit_write_line();
+}
+
+static void emit_visibility(const ir_entity *entity)
+{
+ ir_linkage const linkage = get_entity_linkage(entity);
+
+ 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_external
+ && entity_has_definition(entity)) {
+ be_emit_cstring("\t.globl ");
+ 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)
+ && get_entity_ld_name(entity)[0] != '\0') {
+ be_emit_cstring("\t.no_dead_strip ");
+ be_gas_emit_entity(entity);
be_emit_char('\n');
be_emit_write_line();
}
}
-void be_gas_emit_function_prolog(ir_entity *entity, unsigned po2alignment)
+void be_gas_emit_function_prolog(const ir_entity *entity, unsigned po2alignment, const parameter_dbg_info_t *parameter_infos)
{
- const char *name = get_entity_ld_name(entity);
+ be_gas_section_t section;
- be_gas_emit_switch_section(GAS_SECTION_TEXT);
+ 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_emit_string(name);
- be_emit_char('\n');
- be_emit_write_line();
+ if (be_options.verbose_asm) {
+ be_emit_cstring("# -- Begin ");
+ be_gas_emit_entity(entity);
+ be_emit_char('\n');
+ be_emit_write_line();
+ }
if (po2alignment > 0) {
const char *fill_byte = "";
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_linkage(entity) & IR_LINKAGE_LOCAL) {
+ if (get_entity_visibility(entity) == ir_visibility_local) {
be_emit_cstring("\t.scl\t3;");
} else {
be_emit_cstring("\t.scl\t2;");
case OBJECT_FILE_FORMAT_MACH_O:
break;
}
- be_emit_string(name);
+ be_gas_emit_entity(entity);
be_emit_cstring(":\n");
be_emit_write_line();
+
+ be_dwarf_method_begin();
}
-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);
+ be_dwarf_method_end();
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();
+ }
+
+ if (be_options.verbose_asm) {
+ be_emit_cstring("# -- End ");
+ be_gas_emit_entity(entity);
be_emit_char('\n');
be_emit_write_line();
}
- be_emit_cstring("# -- End ");
- be_emit_string(name);
be_emit_char('\n');
be_emit_write_line();
-}
-
-/**
- * An environment containing all needed dumper data.
- * Currently we create the file completely in memory first, then
- * write it to the disk. This is an artifact from the old C-generating backend
- * and even there NOT needed. So we might change it in the future.
- */
-typedef struct _be_gas_decl_env {
- be_gas_section_t section;
- waitq *worklist; /**< A worklist we use to place not yet handled entities on. */
- const be_main_env_t *main_env;
-} be_gas_decl_env_t;
-/************************************************************************/
+ next_block_nr += 199;
+ next_block_nr -= next_block_nr % 100;
+}
/**
* Output a tarval.
* @param tv the tarval
* @param bytes the width of the tarvals value in bytes
*/
-static void dump_arith_tarval(tarval *tv, int bytes)
+static void emit_arith_tarval(ir_tarval *tv, unsigned bytes)
{
switch (bytes) {
case 1:
return;
case 2:
- be_emit_irprintf("0x%02x%02x", get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
+ be_emit_irprintf("0x%02x%02x",
+ get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
return;
case 4:
be_emit_irprintf("0x%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, 3), get_tarval_sub_bits(tv, 2),
+ get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
return;
case 8:
be_emit_irprintf("0x%02x%02x%02x%02x%02x%02x%02x%02x",
- 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;
-
- case 12:
- /* 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(
- "\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, 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", 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 init a node representing the initializer (on the const code irg)
- *
- * @return the tarval
- */
-static tarval *get_atomic_init_tv(ir_node *init)
-{
- for (;;) {
- ir_mode *mode = get_irn_mode(init);
-
- switch (get_irn_opcode(init)) {
-
- case iro_Cast:
- init = get_Cast_op(init);
- continue;
-
- case iro_Conv:
- init = get_Conv_op(init);
- continue;
-
- case iro_Const:
- return get_Const_tarval(init);
-
- case iro_SymConst:
- switch (get_SymConst_kind(init)) {
- case symconst_type_size:
- return new_tarval_from_long(get_type_size_bytes(get_SymConst_type(init)), mode);
-
- case symconst_type_align:
- return new_tarval_from_long(get_type_alignment_bytes(get_SymConst_type(init)), mode);
-
- case symconst_ofs_ent:
- return new_tarval_from_long(get_entity_offset(get_SymConst_entity(init)), mode);
-
- case symconst_enum_const:
- return get_enumeration_value(get_SymConst_enum(init));
-
- default:
- return NULL;
- }
-
- default:
- return NULL;
- }
- }
-}
-
/**
* Dump an atomic value.
*
* @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 emit_init_expression(be_gas_decl_env_t *env, ir_node *init)
{
ir_mode *mode = get_irn_mode(init);
int bytes = get_mode_size_bytes(mode);
- tarval *tv;
+ ir_tarval *tv;
ir_entity *ent;
init = skip_Id(init);
switch (get_irn_opcode(init)) {
- case iro_Cast:
- do_dump_atomic_init(env, get_Cast_op(init));
- return;
-
case iro_Conv:
- do_dump_atomic_init(env, get_Conv_op(init));
+ emit_init_expression(env, get_Conv_op(init));
return;
case iro_Const:
tv = get_Const_tarval(init);
- /* it's a arithmetic value */
- dump_arith_tarval(tv, bytes);
+ /* it's an arithmetic value */
+ emit_arith_tarval(tv, bytes);
return;
case iro_SymConst:
switch (get_SymConst_kind(init)) {
- case symconst_addr_name:
- be_emit_ident(get_SymConst_name(init));
- break;
-
case symconst_addr_ent:
ent = get_SymConst_entity(init);
- if (!is_entity_backend_marked(ent)) {
- waitq_put(env->worklist, ent);
- set_entity_backend_marked(ent, 1);
- }
be_gas_emit_entity(ent);
break;
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));
+ emit_init_expression(env, get_Add_left(init));
be_emit_cstring(" + ");
- do_dump_atomic_init(env, get_Add_right(init));
+ emit_init_expression(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));
+ emit_init_expression(env, get_Sub_left(init));
be_emit_cstring(" - ");
- do_dump_atomic_init(env, get_Sub_right(init));
+ emit_init_expression(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));
+ emit_init_expression(env, get_Mul_left(init));
be_emit_cstring(" * ");
- do_dump_atomic_init(env, get_Mul_right(init));
+ emit_init_expression(env, get_Mul_right(init));
return;
case iro_Unknown:
return;
default:
- panic("dump_atomic_init(): unsupported IR-node %+F", init);
+ panic("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");
- break;
-
- case 2:
- be_emit_cstring("\t.short\t");
- break;
-
- case 4:
- be_emit_cstring("\t.long\t");
- break;
-
- case 8:
- be_emit_cstring("\t.quad\t");
- break;
-
- case 10:
- case 12:
- /* handled in arith */
- break;
-
- case 16:
- be_emit_cstring("\t.octa\t");
- break;
+ case 1: be_emit_cstring("\t.byte\t"); break;
+ case 2: be_emit_cstring("\t.short\t"); break;
+ case 4: be_emit_cstring("\t.long\t"); break;
+ case 8: be_emit_cstring("\t.quad\t"); break;
default:
panic("Try to dump a type with %u bytes", (unsigned)size);
}
}
-/**
- * Emit an atomic value.
- *
- * @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)
-{
- ir_mode *mode = get_irn_mode(init);
- int bytes = get_mode_size_bytes(mode);
-
- dump_size_type(bytes);
- do_dump_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)
+static void emit_string_char(int c)
{
- 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;
+ switch (c) {
+ case '"' : be_emit_cstring("\\\""); break;
+ case '\n': be_emit_cstring("\\n"); break;
+ case '\r': be_emit_cstring("\\r"); break;
+ case '\t': be_emit_cstring("\\t"); break;
+ case '\\': be_emit_cstring("\\\\"); break;
+ default :
+ if (isprint(c))
+ be_emit_char(c);
+ else
+ be_emit_irprintf("\\%03o", c);
+ break;
}
-
- 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)
+static size_t emit_string_initializer(const ir_initializer_t *initializer)
{
- 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;
+ be_emit_cstring("\t.asciz \"");
- 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;
+ size_t len = initializer->compound.n_initializers;
+ for (size_t i = 0; i < len-1; ++i) {
+ const ir_initializer_t *sub_initializer
+ = get_initializer_compound_value(initializer, i);
- 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)
-{
- int i, len;
- int output_len;
- ir_type *type;
- int type_size;
- int remaining_space;
-
- 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 \"");
- output_len -= 1;
- }
-
- for (i = 0; i < output_len; ++i) {
- ir_node *irn;
- int c;
-
- irn = get_compound_ent_value(ent, i);
- c = (int) get_tarval_long(get_Const_tarval(irn));
-
- switch (c) {
- case '"' : be_emit_cstring("\\\""); break;
- case '\n': be_emit_cstring("\\n"); break;
- case '\r': be_emit_cstring("\\r"); break;
- case '\t': be_emit_cstring("\\t"); break;
- case '\\': be_emit_cstring("\\\\"); break;
- default :
- if (isprint(c))
- be_emit_char(c);
- else
- be_emit_irprintf("\\%o", c);
- break;
- }
+ ir_tarval *tv = get_initializer_tarval(sub_initializer);
+ int c = get_tarval_long(tv);
+ emit_string_char(c);
}
be_emit_cstring("\"\n");
be_emit_write_line();
- type = get_entity_type(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.space\t%d\n", remaining_space);
- }
+ return initializer->compound.n_initializers;
}
-static void dump_string_initializer(const ir_initializer_t *initializer)
+void be_gas_emit_cstring(const char *string)
{
- size_t i, len;
-
- len = initializer->compound.n_initializers;
- 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) {
- const ir_initializer_t *sub_initializer
- = get_initializer_compound_value(initializer, i);
-
- tarval *tv = get_initializer_tarval_value(sub_initializer);
- int c = get_tarval_long(tv);
-
- switch (c) {
- case '"' : be_emit_cstring("\\\""); break;
- case '\n': be_emit_cstring("\\n"); break;
- case '\r': be_emit_cstring("\\r"); break;
- case '\t': be_emit_cstring("\\t"); break;
- case '\\': be_emit_cstring("\\\\"); break;
- default :
- if (isprint(c))
- be_emit_char(c);
- else
- be_emit_irprintf("\\%o", c);
- break;
- }
+ be_emit_cstring("\t.asciz \"");
+ for (const char *c = string; *c != '\0'; ++c) {
+ emit_string_char(*c);
}
be_emit_cstring("\"\n");
be_emit_write_line();
}
-enum normal_or_bitfield_kind {
+typedef enum normal_or_bitfield_kind {
NORMAL = 0,
TARVAL,
+ STRING,
BITFIELD
-};
+} normal_or_bitfield_kind;
typedef struct {
- enum normal_or_bitfield_kind kind;
+ normal_or_bitfield_kind kind;
+ ir_type *type;
union {
- ir_node *value;
- tarval *tarval;
- unsigned char bf_val;
+ ir_node *value;
+ ir_tarval *tarval;
+ unsigned char bf_val;
+ const ir_initializer_t *string;
} v;
} normal_or_bitfield;
-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 {
- 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) {
- 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;
}
}
static size_t max_vals;
#endif
-static void dump_bitfield(normal_or_bitfield *vals, size_t offset_bits,
+static void emit_bitfield(normal_or_bitfield *vals, size_t offset_bits,
const ir_initializer_t *initializer, ir_type *type)
{
- unsigned char last_bits = 0;
- ir_mode *mode = get_type_mode(type);
- tarval *tv = NULL;
- unsigned char curr_bits;
- int value_len;
- int j;
+ static const size_t BITS_PER_BYTE = 8;
+ ir_mode *mode = get_type_mode(type);
+ ir_tarval *tv = NULL;
+ int value_len;
+ size_t bit_offset;
+ size_t end;
+ bool big_endian = be_get_backend_param()->byte_order_big_endian;
switch (get_initializer_kind(initializer)) {
case IR_INITIALIZER_NULL:
}
tv = tarval_convert_to(tv, get_type_mode(type));
- /* normalize offset */
- vals += offset_bits >> 3;
- offset_bits &= 7;
- value_len = get_mode_size_bits(mode);
-
- /* combine bits with existing bits */
- for (j = 0; value_len + (int) offset_bits > 0; ++j) {
- assert((size_t) (vals - glob_vals) + j < max_vals);
- assert(vals[j].kind == BITFIELD ||
- (vals[j].kind == NORMAL && vals[j].v.value == NULL));
- vals[j].kind = BITFIELD;
- curr_bits = get_tarval_sub_bits(tv, j);
- vals[j].v.bf_val
- |= (last_bits >> (8 - offset_bits)) | (curr_bits << offset_bits);
- value_len -= 8;
- last_bits = curr_bits;
+ value_len = get_type_size_bytes(get_primitive_base_type(type));
+ bit_offset = 0;
+ end = get_mode_size_bits(mode);
+ while (bit_offset < end) {
+ size_t src_offset = bit_offset / BITS_PER_BYTE;
+ size_t src_offset_bits = bit_offset % BITS_PER_BYTE;
+ size_t dst_offset = (bit_offset+offset_bits) / BITS_PER_BYTE;
+ size_t dst_offset_bits = (bit_offset+offset_bits) % BITS_PER_BYTE;
+ size_t src_bits_len = end-bit_offset;
+ size_t dst_bits_len = BITS_PER_BYTE-dst_offset_bits;
+ unsigned char curr_bits;
+ normal_or_bitfield *val;
+ if (src_bits_len > dst_bits_len)
+ src_bits_len = dst_bits_len;
+
+ if (big_endian) {
+ val = &vals[value_len - dst_offset - 1];
+ } else {
+ val = &vals[dst_offset];
+ }
+
+ assert((val-glob_vals) < (ptrdiff_t) max_vals);
+ assert(val->kind == BITFIELD ||
+ (val->kind == NORMAL && val->v.value == NULL));
+ val->kind = BITFIELD;
+ curr_bits = get_tarval_sub_bits(tv, src_offset);
+ curr_bits = curr_bits >> src_offset_bits;
+ if (src_offset_bits + src_bits_len > 8) {
+ unsigned next_bits = get_tarval_sub_bits(tv, src_offset+1);
+ curr_bits |= next_bits << (8 - src_offset_bits);
+ }
+ curr_bits &= (1 << src_bits_len) - 1;
+ val->v.bf_val |= curr_bits << dst_offset_bits;
+
+ bit_offset += dst_bits_len;
}
}
-static void dump_ir_initializer(normal_or_bitfield *vals,
+static void emit_ir_initializer(normal_or_bitfield *vals,
const ir_initializer_t *initializer,
ir_type *type)
{
- assert((size_t) (vals - glob_vals) < max_vals);
+ assert((size_t) (vals - glob_vals) <= max_vals);
+
+ if (initializer_is_string_const(initializer)) {
+ assert(vals->kind != BITFIELD);
+ vals->kind = STRING;
+ vals->v.string = initializer;
+ return;
+ }
switch (get_initializer_kind(initializer)) {
case IR_INITIALIZER_NULL:
assert(vals->kind != BITFIELD);
vals->kind = TARVAL;
+ vals->type = type;
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) {
vals[i].kind = NORMAL;
+ vals[i].type = NULL;
vals[i].v.value = NULL;
}
return;
assert(vals->kind != BITFIELD);
vals->kind = NORMAL;
+ vals->type = type;
vals->v.value = get_initializer_const_value(initializer);
for (i = 1; i < get_type_size_bytes(type); ++i) {
vals[i].kind = NORMAL;
+ vals[i].type = NULL;
vals[i].v.value = NULL;
}
return;
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 (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 ||
- (value_len != 8 && value_len != 16 && value_len != 32
- && value_len != 64)) {
- dump_bitfield(&vals[offset], offset_bits,
+ if (is_Primitive_type(subtype)
+ && get_primitive_base_type(subtype) != NULL) {
+ emit_bitfield(&vals[offset], offset_bits,
sub_initializer, subtype);
continue;
+ } else {
+ assert(offset_bits == 0);
}
}
- 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_tarval_data(ir_type *type, ir_tarval *tv)
+{
+ size_t size = get_type_size_bytes(type);
+ if (size == 12) {
+ /* this should be an x86 extended float */
+ assert(be_get_backend_param()->byte_order_big_endian == 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\n",
+ 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)
+ );
+ be_emit_write_line();
+ } else if (size == 16) {
+ if (be_get_backend_param()->byte_order_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\n"
+ "\t.long\t0x%02x%02x%02x%02x\n",
+ get_tarval_sub_bits(tv, 15), get_tarval_sub_bits(tv, 14),
+ 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)
+ );
+ } else {
+ /* 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\n"
+ "\t.long\t0x%02x%02x%02x%02x\n",
+ 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),
+ get_tarval_sub_bits(tv, 15), get_tarval_sub_bits(tv, 14),
+ get_tarval_sub_bits(tv, 13), get_tarval_sub_bits(tv, 12)
+ );
+ }
+ be_emit_write_line();
+ return;
+ } else {
+ /* default case */
+ emit_size_type(size);
+ emit_arith_tarval(tv, size);
+ be_emit_char('\n');
+ be_emit_write_line();
+ }
+}
+
+/**
+ * Emit an atomic value.
+ *
+ * @param env the gas output environment
+ * @param init a node representing the atomic value (on the const code irg)
+ */
+static void emit_node_data(be_gas_decl_env_t *env, ir_node *init, ir_type *type)
+{
+ size_t size = get_type_size_bytes(type);
+ if (size == 12 || size == 16) {
+ ir_tarval *tv;
+ if (!is_Const(init)) {
+ panic("12/16byte initializers only support Const nodes yet");
+ }
+ tv = get_Const_tarval(init);
+ emit_tarval_data(type, tv);
+ return;
+ }
+
+ emit_size_type(size);
+ emit_init_expression(env, init);
+ be_emit_char('\n');
+ be_emit_write_line();
+}
+
+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 space = 0;
- int elem_size = 1;
- if (vals[k].kind == NORMAL) {
+ int space = 0;
+ normal_or_bitfield_kind kind = vals[k].kind;
+ int elem_size;
+ switch (kind) {
+ case NORMAL:
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) {
- tarval *tv = vals[k].v.tarval;
- size_t size = get_mode_size_bytes(get_tarval_mode(tv));
-
- assert(tv != NULL);
-
- elem_size = size;
- dump_size_type(size);
- dump_arith_tarval(tv, size);
- be_emit_char('\n');
- be_emit_write_line();
- } else {
- assert(vals[k].kind == BITFIELD);
+ emit_node_data(env, vals[k].v.value, vals[k].type);
+ elem_size = get_type_size_bytes(vals[k].type);
+ } else {
+ elem_size = 0;
+ }
+ break;
+ case TARVAL:
+ emit_tarval_data(vals[k].type, vals[k].v.tarval);
+ elem_size = get_type_size_bytes(vals[k].type);
+ break;
+ case STRING:
+ elem_size = emit_string_initializer(vals[k].v.string);
+ break;
+ case BITFIELD:
be_emit_irprintf("\t.byte\t%d\n", vals[k].v.bf_val);
be_emit_write_line();
+ elem_size = 1;
+ break;
+ default:
+ panic("internal compiler error (invalid normal_or_bitfield_kind");
}
k += elem_size;
/* a gap */
if (space > 0) {
- be_emit_irprintf("\t.space\t%d\n", space);
- be_emit_write_line();
- }
- }
- xfree(vals);
-}
-
-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_is_string_const(ent)) {
- dump_string_cst(ent);
- return;
- }
-
- n = get_compound_ent_n_values(ent);
-
- /* Find the initializer size. Sorrily gcc support a nasty feature:
- The last field of a compound may be a flexible array. This allows
- initializers bigger than the type size. */
- last_ofs = get_type_size_bytes(get_entity_type(ent));
- for (i = 0; i < n; ++i) {
- unsigned offset = get_compound_ent_value_offset_bytes(ent, i);
- unsigned bits_remainder = get_compound_ent_value_offset_bit_remainder(ent, i);
- ir_node *value = get_compound_ent_value(ent, i);
- unsigned value_len = get_mode_size_bits(get_irn_mode(value));
-
- offset += (value_len + bits_remainder + 7) >> 3;
-
- if (offset > last_ofs) {
- last_ofs = offset;
- }
- }
-
- /*
- * In the worst case, every initializer allocates one byte.
- * Moreover, initializer might be big, do not allocate on stack.
- */
- vals = XMALLOCNZ(normal_or_bitfield, last_ofs);
-
- /* collect the values and store them at the offsets */
- for (i = 0; i < n; ++i) {
- unsigned offset = get_compound_ent_value_offset_bytes(ent, i);
- int offset_bits = get_compound_ent_value_offset_bit_remainder(ent, i);
- ir_node *value = get_compound_ent_value(ent, i);
- int value_len = get_mode_size_bits(get_irn_mode(value));
-
- assert(offset_bits >= 0);
-
- if (offset_bits != 0 ||
- (value_len != 8 && value_len != 16 && value_len != 32 && value_len != 64)) {
- tarval *tv = get_atomic_init_tv(value);
- 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));
- }
- /* normalize offset */
- offset += offset_bits >> 3;
- offset_bits &= 7;
-
- for (j = 0; value_len + offset_bits > 0; ++j) {
- assert(offset + j < last_ofs);
- assert(vals[offset + j].kind == BITFIELD || vals[offset + j].v.value == NULL);
- vals[offset + j].kind = BITFIELD;
- curr_bits = get_tarval_sub_bits(tv, j);
- vals[offset + j].v.bf_val |= (last_bits >> (8 - offset_bits)) | (curr_bits << offset_bits);
- value_len -= 8;
- last_bits = curr_bits;
- }
- } else {
- int i;
-
- assert(offset < last_ofs);
- assert(vals[offset].kind == NORMAL);
- for (i = 1; i < value_len / 8; ++i) {
- assert(vals[offset + i].v.value == NULL);
- }
- vals[offset].v.value = value;
- }
- }
-
- /* now write them sorted */
- for (k = 0; k < last_ofs; ) {
- int space = 0, skip = 0;
- if (vals[k].kind == NORMAL) {
- 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 {
- assert(vals[k].kind == BITFIELD);
- be_emit_irprintf("\t.byte\t%d\n", vals[k].v.bf_val);
- }
-
- ++k;
- while (k < last_ofs && vals[k].kind == NORMAL && vals[k].v.value == NULL) {
- ++space;
- ++k;
- }
- space -= skip;
- assert(space >= 0);
-
- /* a gap */
- if (space > 0) {
- be_emit_irprintf("\t.space\t%d\n", space);
+ be_emit_irprintf("\t.space\t%d, 0\n", space);
be_emit_write_line();
}
}
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);
-
- 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;
+ unsigned size = get_type_size_bytes(get_entity_type(entity));
+ unsigned alignment = get_effective_entity_alignment(entity);
- } 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 emit_indirect_symbol(const ir_entity *entity, be_gas_section_t section)
+{
+ /* we can only do PIC code on macho so far */
+ assert(be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O);
+
+ be_gas_emit_entity(entity);
+ be_emit_cstring(":\n");
+ be_emit_write_line();
+ be_emit_irprintf("\t.indirect_symbol %I\n", get_entity_ident(entity));
+ be_emit_write_line();
+ if (section == GAS_SECTION_PIC_TRAMPOLINES) {
+ be_emit_cstring("\thlt ; hlt ; hlt ; hlt ; hlt\n");
+ be_emit_write_line();
+ } else {
+ assert(section == GAS_SECTION_PIC_SYMBOLS);
+ be_emit_cstring("\t.long 0\n");
+ be_emit_write_line();
+ }
+}
+
+char const *be_gas_get_private_prefix(void)
+{
+ return be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O ? "L" : ".L";
+}
+
+void be_gas_emit_entity(const ir_entity *entity)
+{
+ if (entity->type == get_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_irprintf("%I", get_entity_ld_ident(entity));
+}
+
+void be_gas_emit_block_name(const ir_node *block)
+{
+ ir_entity *entity = get_Block_entity(block);
+ if (entity != NULL) {
+ be_gas_emit_entity(entity);
+ } else {
+ void *nr_val = pmap_get(void, block_numbers, block);
+ int nr;
+ if (nr_val == NULL) {
+ nr = next_block_nr++;
+ pmap_insert(block_numbers, block, INT_TO_PTR(nr+1));
+ } else {
+ nr = PTR_TO_INT(nr_val)-1;
+ }
+ be_emit_irprintf("%s%d", be_gas_get_private_prefix(), nr);
+ }
+}
+
+void be_gas_begin_block(const ir_node *block, bool needs_label)
+{
+ if (needs_label) {
+ be_gas_emit_block_name(block);
+ be_emit_char(':');
+ } else {
+ if (!be_options.verbose_asm)
+ return;
+ be_emit_cstring("/*");
+ be_gas_emit_block_name(block);
+ be_emit_cstring(":*/");
+ }
+
+ if (be_options.verbose_asm) {
+ be_emit_pad_comment();
+ be_emit_irprintf("/* %+F preds:", block);
+
+ int arity = get_irn_arity(block);
+ if (arity == 0) {
+ be_emit_cstring(" none");
+ } else {
+ int i;
+ for (i = 0; i < arity; ++i) {
+ ir_node *predblock = get_Block_cfgpred_block(block, i);
+ be_emit_char(' ');
+ be_gas_emit_block_name(predblock);
+ }
+ }
+ be_emit_irprintf(", freq: %.3f */", get_block_execfreq(block));
+ }
+ be_emit_char('\n');
+ be_emit_write_line();
+}
+
/**
* 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_linkage linkage = get_entity_linkage(ent);
-
- /* we already emitted all methods. Except for the trampolines which
- * the assembler/linker generates */
+ 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 emitted in the code. */
+ if (type == get_code_type())
+ return;
+
+ /* 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) {
return;
}
- /* block labels are already emittet in the code */
- if (type == firm_code_type)
- return;
- be_dbg_variable(ent);
+ be_dwarf_variable(entity);
+
+ if (section == GAS_SECTION_BSS) {
+ switch (visibility) {
+ case ir_visibility_local:
+ case ir_visibility_private:
+ emit_local_common(entity);
+ return;
+ case ir_visibility_external:
+ if (linkage & IR_LINKAGE_MERGE) {
+ emit_common(entity);
+ return;
+ }
+ break;
+ }
+ }
- /* nothing to do for externally defined values */
- if (linkage & IR_LINKAGE_EXTERN)
- return;
+ emit_visibility(entity);
if (!is_po2(alignment))
panic("alignment not a power of 2");
- if (section == GAS_SECTION_BSS &&
- (get_entity_linkage(ent) & IR_LINKAGE_MERGE)) {
- emit_common(ent);
+ emit_section(section, entity);
+
+ if (section == GAS_SECTION_PIC_TRAMPOLINES
+ || section == GAS_SECTION_PIC_SYMBOLS) {
+ emit_indirect_symbol(entity, section);
return;
}
- be_gas_emit_switch_section(section);
+ /* nothing left to do without an initializer */
+ if (!entity_has_definition(entity))
+ return;
/* alignment */
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_gas_emit_types
+ && visibility != ir_visibility_private) {
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 */
- be_emit_irprintf("\t.space %u\n", get_type_size_bytes(type));
+ 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)) {
+ /* 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));
+ be_emit_write_line();
+ }
+ } 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
- * @param only_emit_marked if non-zero, external allocated entities that do not have
- * its visited flag set are ignored
*/
-static void be_gas_dump_globals(ir_type *gt, be_gas_decl_env_t *env,
- int only_emit_marked)
+static void be_gas_emit_globals(ir_type *gt, be_gas_decl_env_t *env)
{
- int i, n = get_compound_n_members(gt);
- waitq *worklist = new_waitq();
-
- if (only_emit_marked) {
- for (i = 0; i < n; i++) {
- ir_entity *ent = get_compound_member(gt, i);
- if (is_entity_backend_marked(ent) || entity_has_definition(ent)) {
- 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;
+ size_t i, n = get_compound_n_members(gt);
- while (!waitq_empty(worklist)) {
- ir_entity *ent = waitq_get(worklist);
-
- dump_global(env, ent);
+ for (i = 0; i < n; i++) {
+ ir_entity *ent = get_compound_member(gt, i);
+ emit_global(env, ent);
}
-
- del_waitq(worklist);
- env->worklist = NULL;
}
-/************************************************************************/
-
/* Generate all entities. */
-void be_gas_emit_decls(const be_main_env_t *main_env,
- int only_emit_marked_entities)
+static void emit_global_decls(const be_main_env_t *main_env)
{
be_gas_decl_env_t env;
memset(&env, 0, sizeof(env));
env.main_env = main_env;
env.section = (be_gas_section_t) -1;
- be_gas_dump_globals(get_glob_type(), &env, only_emit_marked_entities);
- be_gas_dump_globals(get_tls_type(), &env, only_emit_marked_entities);
- be_gas_dump_globals(get_segment_type(IR_SEGMENT_CONSTRUCTORS), &env,
- only_emit_marked_entities);
- be_gas_dump_globals(get_segment_type(IR_SEGMENT_DESTRUCTORS), &env,
- only_emit_marked_entities);
- be_gas_dump_globals(main_env->pic_symbols_type, &env,
- only_emit_marked_entities);
- be_gas_dump_globals(main_env->pic_trampolines_type, &env,
- only_emit_marked_entities);
+ 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
be_emit_write_line();
}
}
+
+void be_emit_jump_table(const ir_node *node, const ir_switch_table *table,
+ ir_entity *entity, get_cfop_target_func get_cfop_target)
+{
+ 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;
+ 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);
+ 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;
+ }
+ }
+
+ /* 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 (%+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;
+ }
+ }
+ }
+
+ /* 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");
+ }
+
+ for (i = 0; i < length; ++i) {
+ const ir_node *block = labels[i];
+ if (block == NULL)
+ block = targets[0];
+ be_emit_cstring("\t.long ");
+ be_gas_emit_block_name(block);
+ be_emit_char('\n');
+ be_emit_write_line();
+ }
+
+ if (entity != NULL)
+ be_gas_emit_switch_section(GAS_SECTION_TEXT);
+
+ xfree(labels);
+ xfree(targets);
+}
+
+static void emit_global_asms(void)
+{
+ size_t n = get_irp_n_asms();
+ size_t i;
+
+ be_gas_emit_switch_section(GAS_SECTION_TEXT);
+ for (i = 0; i < n; ++i) {
+ ident *asmtext = get_irp_asm(i);
+
+ be_emit_cstring("#APP\n");
+ be_emit_write_line();
+ be_emit_irprintf("%I\n", asmtext);
+ be_emit_write_line();
+ be_emit_cstring("#NO_APP\n");
+ be_emit_write_line();
+ }
+}
+
+void be_gas_begin_compilation_unit(const be_main_env_t *env)
+{
+ be_dwarf_open();
+ be_dwarf_unit_begin(env->cup_name);
+
+ block_numbers = pmap_create();
+ next_block_nr = 0;
+
+ emit_global_asms();
+}
+
+void be_gas_end_compilation_unit(const be_main_env_t *env)
+{
+ emit_global_decls(env);
+
+ pmap_destroy(block_numbers);
+
+ be_dwarf_unit_end();
+ be_dwarf_close();
+}
projects / libfirm / blobdiff