/*
- * Copyright (C) 1995-2007 University of Karlsruhe. All right reserved.
+ * Copyright (C) 1995-2011 University of Karlsruhe. All right reserved.
*
* This file is part of libFirm.
*
* @brief Dumps global variables and constants as gas assembler.
* @author Christian Wuerdig, Matthias Braun
* @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 "util.h"
+#include "execfreq.h"
#include "be_t.h"
+#include "bearch.h"
#include "beemitter.h"
-#include "be_dbgout.h"
-
-typedef struct obstack obstack_t;
+#include "bedwarf.h"
/** by default, we generate assembler code for the Linux gas */
-be_gas_flavour_t be_gas_flavour = GAS_FLAVOUR_NORMAL;
-
-/**
- * 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
- */
-static const char *get_section_name(be_gas_section_t section) {
- static const char *text[GAS_FLAVOUR_MAX][GAS_SECTION_MAX] = {
- {
- ".section\t.text",
- ".section\t.data",
- ".section\t.rodata",
- ".section\t.bss",
- ".section\t.tbss,\"awT\",@nobits",
- ".section\t.ctors,\"aw\",@progbits"
- },
- {
- ".section\t.text",
- ".section\t.data",
- ".section .rdata,\"dr\"",
- ".section\t.bss",
- ".section\t.tbss,\"awT\",@nobits",
- ".section\t.ctors,\"aw\",@progbits"
- }
- };
-
- assert((int) be_gas_flavour >= 0 && be_gas_flavour < GAS_FLAVOUR_MAX);
- assert((int) section >= 0 && section < GAS_SECTION_MAX);
- return text[be_gas_flavour][section];
-}
+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 = '@';
-/**
- * Emit necessary code to switch to a section.
- *
- * @param env the emitter environment
- * @param section the section to switch to
- */
-void be_gas_emit_switch_section(be_gas_section_t section) {
- be_emit_char('\t');
- be_emit_string(get_section_name(section));
- be_emit_char('\n');
- be_emit_write_line();
-}
+static be_gas_section_t current_section = (be_gas_section_t) -1;
+static pmap *block_numbers;
+static unsigned next_block_nr;
/**
* An environment containing all needed dumper data.
* 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 {
- obstack_t *rodata_obst; /**< An obstack that will be filled with all rodata entities. */
- obstack_t *data_obst; /**< An obstack that will be filled with the initialized entities. */
- obstack_t *bss_obst; /**< An obstack that will be filled with the uninitialized entities. */
- obstack_t *ctor_obst; /**< An obstack that will be filled with the constructor entities. */
- const be_main_env_t *main_env; /**< The main backend environment, used for it's debug handle. */
- waitq *worklist; /**< A worklist we use to place not yet handled entities on. */
+typedef struct be_gas_decl_env {
+ be_gas_section_t section;
+ const be_main_env_t *main_env;
} be_gas_decl_env_t;
-/************************************************************************/
-
-/**
- * Output a tarval.
- *
- * @param obst the obstack where the data is written too
- * @param tv the tarval
- * @param bytes the width of the tarvals value in bytes
- */
-static void dump_arith_tarval(obstack_t *obst, tarval *tv, int bytes)
+static void emit_section_macho(be_gas_section_t section)
{
- switch (bytes) {
-
- case 1:
- obstack_printf(obst, "0x%02x", get_tarval_sub_bits(tv, 0));
- break;
-
- case 2:
- obstack_printf(obst, "0x%02x%02x", get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
- break;
-
- case 4:
- obstack_printf(obst, "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));
- break;
-
- case 8:
- obstack_printf(obst, "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));
- break;
-
- case 10:
- case 12:
- break;
-
- case 16:
- obstack_printf(obst, "0x%02x%02x%02x%02x%02x%02x%02x%02x"
- "%02x%02x%02x%02x%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));
- break;
+ be_gas_section_t base = section & GAS_SECTION_TYPE_MASK;
+ be_gas_section_t flags = section & ~GAS_SECTION_TYPE_MASK;
+ const char *name;
-
- default:
- fprintf(stderr, "Try to dump an tarval with %d bytes\n", bytes);
- assert(0);
+ 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();
}
-/**
- * Return the label prefix for labeled blocks.
- */
-const char *be_gas_label_prefix(void) {
- return ".LG";
-}
-
-/**
- * Dump a label.
- */
-static void dump_label(obstack_t *obst, ir_label_t label) {
- obstack_printf(obst, "%s%ld", be_gas_label_prefix(), label);
-}
-
-/**
- * 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)
+static void emit_section_sparc(be_gas_section_t section, const ir_entity *entity)
{
- 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);
+ 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",
+ };
- 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);
+ if (current_section == section && !(section & GAS_SECTION_FLAG_COMDAT))
+ return;
+ current_section = section;
- case symconst_type_align:
- return new_tarval_from_long(get_type_alignment_bytes(get_SymConst_type(init)), mode);
+ be_emit_cstring("\t.section\t\".");
- case symconst_ofs_ent:
- return new_tarval_from_long(get_entity_offset(get_SymConst_entity(init)), mode);
+ /* 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]);
- case symconst_enum_const:
- return get_enumeration_value(get_SymConst_enum(init));
+ if (flags & GAS_SECTION_FLAG_COMDAT) {
+ be_emit_char('.');
+ be_gas_emit_entity(entity);
+ }
+ be_emit_char('"');
- case symconst_label:
- return NULL;
+ /* for the simple sections we're done here */
+ if (flags == 0)
+ goto end;
- default:
- return NULL;
- }
+ be_emit_cstring(",#alloc");
- default:
- return NULL;
- }
+ 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();
}
-/**
- * Dump an atomic value.
- *
- * @param env the gas output environment
- * @param obst an obstack the output is written to
- * @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, obstack_t *obst,
- ir_node *init)
+static void emit_section(be_gas_section_t section, const ir_entity *entity)
{
- ir_mode *mode = get_irn_mode(init);
- int bytes = get_mode_size_bytes(mode);
- tarval *tv;
- ir_label_t label;
- ir_entity *ent;
-
- switch (get_irn_opcode(init)) {
-
- case iro_Cast:
- do_dump_atomic_init(env, obst, get_Cast_op(init));
- return;
+ 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", "" },
+ };
- case iro_Conv:
- do_dump_atomic_init(env, obst, get_Conv_op(init));
+ if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) {
+ emit_section_macho(section);
return;
-
- case iro_Const:
- tv = get_Const_tarval(init);
-
- /* it's a arithmetic value */
- dump_arith_tarval(obst, tv, bytes);
+ } else if(be_gas_elf_variant == ELF_VARIANT_SPARC) {
+ emit_section_sparc(section, entity);
return;
+ }
- case iro_SymConst:
- switch (get_SymConst_kind(init)) {
- case symconst_addr_name:
- obstack_printf(obst, "%s", get_id_str(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);
- }
- obstack_printf(obst, "%s", get_entity_ld_name(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
- obstack_printf(obst, "%d", get_entity_offset(ent));
- break;
-
- case symconst_type_size:
- obstack_printf(obst, "%u", get_type_size_bytes(get_SymConst_type(init)));
- break;
-
- case symconst_type_align:
- obstack_printf(obst, "%u", get_type_alignment_bytes(get_SymConst_type(init)));
- break;
-
- case symconst_enum_const:
- tv = get_enumeration_value(get_SymConst_enum(init));
- dump_arith_tarval(obst, tv, bytes);
- break;
-
- case symconst_label:
- label = get_SymConst_label(init);
- dump_label(obst, label);
- break;
-
- default:
- assert(!"dump_atomic_init(): don't know how to init from this SymConst");
- }
+ if (current_section == section && !(section & GAS_SECTION_FLAG_COMDAT))
return;
-
- case iro_Add:
- do_dump_atomic_init(env, obst, get_Add_left(init));
- obstack_printf(obst, " + ");
- do_dump_atomic_init(env, obst, get_Add_right(init));
+ current_section = section;
+
+ /* shortforms */
+ if (flags == 0) {
+ switch (base) {
+ case GAS_SECTION_TEXT:
+ be_emit_cstring("\t.text\n");
+ be_emit_write_line();
return;
-
- case iro_Sub:
- do_dump_atomic_init(env, obst, get_Sub_left(init));
- obstack_printf(obst, " - ");
- do_dump_atomic_init(env, obst, get_Sub_right(init));
+ case GAS_SECTION_DATA:
+ be_emit_cstring("\t.data\n");
+ be_emit_write_line();
return;
-
- case iro_Mul:
- do_dump_atomic_init(env, obst, get_Mul_left(init));
- obstack_printf(obst, " * ");
- do_dump_atomic_init(env, obst, get_Mul_right(init));
+ 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:
- assert(0 && "dump_atomic_init(): unknown IR-node");
+ break;
+ }
}
-}
-/**
- * Dumps the type for given size (.byte, .long, ...)
- *
- * @param obst an obstack the output is written to
- * @param size the size in bytes
- */
-static void dump_size_type(obstack_t *obst, int size) {
- switch (size) {
+ 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);
+ }
- case 1:
- obstack_printf(obst, "\t.byte\t");
- break;
+ /* 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);
+ }
- case 2:
- obstack_printf(obst, "\t.value\t");
- break;
+ 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();
+}
- case 4:
- obstack_printf(obst, "\t.long\t");
- break;
- case 8:
- obstack_printf(obst, "\t.quad\t");
- break;
- case 10:
- case 12:
- /* handled in arith */
- break;
+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));
- case 16:
- obstack_printf(obst, "\t.octa\t");
- break;
+ emit_section(section, NULL);
+}
- default:
- fprintf(stderr, "Try to dump a type with %d bytes\n", size);
- assert(0);
+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();
}
-/**
- * Dump an atomic value to an obstack.
- *
- * @param env the gas output environment
- * @param obst an obstack the output is written to
- * @param init a node representing the atomic value (on the const code irg)
- */
-static void dump_atomic_init(be_gas_decl_env_t *env, obstack_t *obst,
- ir_node *init)
+static bool initializer_is_string_const(const ir_initializer_t *initializer)
{
- ir_mode *mode = get_irn_mode(init);
- int bytes = get_mode_size_bytes(mode);
+ 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;
+ }
- dump_size_type(obst, bytes);
- do_dump_atomic_init(env, obst, init);
- obstack_printf(obst, "\n");
+ return found_printable;
}
-/************************************************************************/
-/* Routines to dump global variables */
-/************************************************************************/
+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 ent_is_string_const(ir_entity *ent)
+static int entity_is_string_const(const ir_entity *ent)
{
ir_type *type, *element_type;
ir_mode *mode;
- int i, c, n;
type = get_entity_type(ent);
/* 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 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((i < n - 1 && !(isgraph(c) || isspace(c)))
- || (i == n - 1 && c != '\0'))
- return 0;
+ if (ent->initializer != NULL) {
+ return initializer_is_string_const(ent->initializer);
}
- /* then we can emit it as a string constant */
- return 1;
+ return 0;
}
-/**
- * Dump a string constant.
- * No checks are made!!
- *
- * @param obst The obst to dump on.
- * @param ent The entity to dump.
- */
-static void dump_string_cst(obstack_t *obst, ir_entity *ent)
-{
- int i, n;
- ir_type *type;
- int type_size;
- int remaining_space;
-
- obstack_printf(obst, "\t.string \"");
- n = get_compound_ent_n_values(ent);
-
- for (i = 0; i < n-1; ++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 '"' : obstack_printf(obst, "\\\""); break;
- case '\n': obstack_printf(obst, "\\n"); break;
- case '\r': obstack_printf(obst, "\\r"); break;
- case '\t': obstack_printf(obst, "\\t"); break;
- case '\\': obstack_printf(obst, "\\\\"); break;
- default :
- if (isprint(c))
- obstack_printf(obst, "%c", c);
- else
- obstack_printf(obst, "\\%o", c);
- break;
- }
- }
- obstack_printf(obst, "\"\n");
-
- type = get_entity_type(ent);
- type_size = get_type_size_bytes(type);
- remaining_space = type_size - n;
- assert(remaining_space >= 0);
- if(remaining_space > 0) {
- obstack_printf(obst, "\t.skip\t%d\n", remaining_space);
- }
+static bool entity_is_null(const ir_entity *entity)
+{
+ ir_initializer_t *initializer = get_entity_initializer(entity);
+ return initializer == NULL || initializer_is_null(initializer);
}
-enum normal_or_bitfield_kind {
- NORMAL = 0,
- BITFIELD
-};
-
-typedef struct {
- enum normal_or_bitfield_kind kind;
- union {
- ir_node *value;
- unsigned char bf_val;
- } v;
-} normal_or_bitfield;
+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);
+}
-/**
- * Dump an initializer for a compound entity.
- */
-static void dump_compound_init(be_gas_decl_env_t *env, obstack_t *obst,
- ir_entity *ent)
+static be_gas_section_t determine_basic_section(const ir_entity *entity)
{
- normal_or_bitfield *vals;
- int i, j, n = get_compound_ent_n_values(ent);
- unsigned k, last_ofs;
+ ir_linkage linkage;
- /* 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));
+ if (is_method_entity(entity))
+ return GAS_SECTION_TEXT;
- offset += (value_len + bits_remainder + 7) >> 3;
+ 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;
- if (offset > last_ofs) {
- last_ofs = offset;
- }
+ return GAS_SECTION_RODATA;
}
+ if (entity_is_null(entity))
+ return GAS_SECTION_BSS;
- /*
- * 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]));
-
- /* 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'\n",
- 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;
+ return GAS_SECTION_DATA;
+}
- 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;
- }
+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;
}
- /* 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, obst, 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);
- obstack_printf(obst, "\t.byte\t%d\n", vals[k].v.bf_val);
- }
+ /* the java frontend keeps some functions inside classes */
+ if (is_Class_type(owner)) {
+ return determine_basic_section(entity);
+ }
- ++k;
- while (k < last_ofs && vals[k].kind == NORMAL && vals[k].v.value == NULL) {
- ++space;
- ++k;
- }
- space -= skip;
- assert(space >= 0);
+ panic("Couldn't determine section for %+F?!?", entity);
+}
- /* a gap */
- if (space > 0)
- obstack_printf(obst, "\t.skip\t%d\n", space);
+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 ");
}
- xfree(vals);
+ be_gas_emit_entity(entity);
+ 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
- * @param emit_commons if non-zero, emit commons (non-local uninitialized entities)
- */
-static void dump_global(be_gas_decl_env_t *env, ir_entity *ent, int emit_commons)
-{
- obstack_t *obst;
- ir_type *type = get_entity_type(ent);
- const char *ld_name = get_entity_ld_name(ent);
- unsigned align = get_type_alignment_bytes(type);
- int emit_as_common = 0;
- ir_variability variability;
- ir_visibility visibility;
-
- obst = env->data_obst;
- if (is_Method_type(type)) {
- if (get_method_img_section(ent) == section_constructors) {
- obst = env->ctor_obst;
- obstack_printf(obst, ".balign\t%u\n", align);
- dump_size_type(obst, align);
- obstack_printf(obst, "%s\n", ld_name);
- }
- return;
+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();
}
- variability = get_entity_variability(ent);
- visibility = get_entity_visibility(ent);
- if (variability == variability_constant) {
- /* a constant entity, put it on the rdata */
- obst = env->rodata_obst;
- } else if (variability == variability_uninitialized) {
- /* uninitialized entity put it in bss segment */
- obst = env->bss_obst;
- if (emit_commons && visibility != visibility_local)
- emit_as_common = 1;
+ 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();
}
+}
- be_dbg_variable(env->main_env->db_handle, obst, ent);
+void be_gas_emit_function_prolog(const ir_entity *entity, unsigned po2alignment, const parameter_dbg_info_t *parameter_infos)
+{
+ be_gas_section_t section;
- /* global or not global */
- if (visibility == visibility_external_visible && !emit_as_common) {
- obstack_printf(obst, ".global\t%s\n", ld_name);
- } else if(visibility == visibility_external_allocated) {
- obstack_printf(obst, ".global\t%s\n", ld_name);
- /* we can return now... */
- return;
- }
- /* alignment */
- if (align > 1 && !emit_as_common) {
- obstack_printf(obst, ".balign\t%u\n", align);
- }
+ be_dwarf_method_before(entity, parameter_infos);
+
+ section = determine_section(NULL, entity);
+ emit_section(section, entity);
- if (!emit_as_common) {
- obstack_printf(obst, "%s:\n", ld_name);
+ /* write the begin line (makes the life easier for scripts parsing the
+ * assembler) */
+ if (be_options.verbose_asm) {
+ be_emit_cstring("# -- Begin ");
+ be_gas_emit_entity(entity);
+ be_emit_char('\n');
+ be_emit_write_line();
}
- if (variability == variability_uninitialized) {
- if(emit_as_common) {
- if (be_gas_flavour == GAS_FLAVOUR_NORMAL)
- obstack_printf(obst, "\t.comm %s,%u,%u\n",
- ld_name, get_type_size_bytes(type), align);
- else
- obstack_printf(obst, "\t.comm %s,%u # %u\n",
- ld_name, get_type_size_bytes(type), align);
- } else {
- obstack_printf(obst, "\t.zero %u\n", get_type_size_bytes(type));
+ 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";
}
- } else {
- if (is_atomic_entity(ent)) {
- dump_atomic_init(env, obst, 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(obst, ent);
- else
- dump_compound_init(env, obst, ent);
- break;
- case tpo_struct:
- case tpo_class:
- case tpo_union:
- dump_compound_init(env, obst, ent);
- break;
- default:
- assert(0);
+ be_emit_cstring("\t.p2align ");
+ be_emit_irprintf("%u,%s,%u\n", po2alignment, fill_byte, maximum_skip);
+ be_emit_write_line();
+ }
+ emit_visibility(entity);
+
+ switch (be_gas_object_file_format) {
+ case OBJECT_FILE_FORMAT_ELF:
+ be_emit_cstring("\t.type\t");
+ be_gas_emit_entity(entity);
+ be_emit_cstring(", ");
+ be_emit_char(be_gas_elf_type_char);
+ be_emit_cstring("function\n");
+ be_emit_write_line();
+ break;
+ case OBJECT_FILE_FORMAT_COFF:
+ be_emit_cstring("\t.def\t");
+ be_gas_emit_entity(entity);
+ be_emit_cstring(";");
+ if (get_entity_visibility(entity) == ir_visibility_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 OBJECT_FILE_FORMAT_MACH_O:
+ break;
+ }
+ 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_emit_cstring(", .-");
+ 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_char('\n');
+ be_emit_write_line();
+
+ 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 emit_arith_tarval(ir_tarval *tv, unsigned bytes)
+{
+ switch (bytes) {
+ case 1:
+ be_emit_irprintf("0x%02x", get_tarval_sub_bits(tv, 0));
+ return;
+
+ case 2:
+ 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));
+ 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;
+ }
+
+ panic("Can't dump a tarval with %d bytes", bytes);
+}
+
+/**
+ * Return the label prefix for labeled instructions.
+ */
+const char *be_gas_insn_label_prefix(void)
+{
+ return ".LE";
+}
+
+/**
+ * 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 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);
+ ir_tarval *tv;
+ ir_entity *ent;
+
+ init = skip_Id(init);
+
+ switch (get_irn_opcode(init)) {
+ case iro_Cast:
+ emit_init_expression(env, get_Cast_op(init));
+ return;
+
+ case iro_Conv:
+ emit_init_expression(env, get_Conv_op(init));
+ return;
+
+ case iro_Const:
+ tv = get_Const_tarval(init);
+
+ /* it's an arithmetic value */
+ emit_arith_tarval(tv, bytes);
+ return;
+
+ case iro_SymConst:
+ switch (get_SymConst_kind(init)) {
+ case symconst_addr_ent:
+ ent = get_SymConst_entity(init);
+ be_gas_emit_entity(ent);
+ break;
+
+ case symconst_ofs_ent:
+ ent = get_SymConst_entity(init);
+ be_emit_irprintf("%d", get_entity_offset(ent));
+ break;
+
+ case symconst_type_size:
+ be_emit_irprintf("%u", get_type_size_bytes(get_SymConst_type(init)));
+ break;
+
+ case symconst_type_align:
+ be_emit_irprintf("%u", get_type_alignment_bytes(get_SymConst_type(init)));
+ break;
+
+ case symconst_enum_const:
+ tv = get_enumeration_value(get_SymConst_enum(init));
+ emit_arith_tarval(tv, bytes);
+ break;
+
+ default:
+ assert(!"emit_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");
+ }
+ emit_init_expression(env, get_Add_left(init));
+ be_emit_cstring(" + ");
+ 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");
+ }
+ emit_init_expression(env, get_Sub_left(init));
+ be_emit_cstring(" - ");
+ 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");
+ }
+ emit_init_expression(env, get_Mul_left(init));
+ be_emit_cstring(" * ");
+ emit_init_expression(env, get_Mul_right(init));
+ return;
+
+ case iro_Unknown:
+ be_emit_cstring("0");
+ return;
+
+ default:
+ panic("unsupported IR-node %+F", init);
+ }
+}
+
+/**
+ * Dumps the type for given size (.byte, .long, ...)
+ *
+ * @param size the size in bytes
+ */
+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;
+
+ default:
+ panic("Try to dump a type with %u bytes", (unsigned)size);
+ }
+}
+
+static void emit_string_char(int c)
+{
+ 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;
+ }
+}
+
+static size_t emit_string_initializer(const ir_initializer_t *initializer)
+{
+ be_emit_cstring("\t.asciz \"");
+
+ 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);
+
+ 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();
+
+ return initializer->compound.n_initializers;
+}
+
+void be_gas_emit_cstring(const char *string)
+{
+ 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();
+}
+
+typedef enum normal_or_bitfield_kind {
+ NORMAL = 0,
+ TARVAL,
+ STRING,
+ BITFIELD
+} normal_or_bitfield_kind;
+
+typedef struct {
+ normal_or_bitfield_kind kind;
+ ir_type *type;
+ union {
+ ir_node *value;
+ ir_tarval *tarval;
+ unsigned char bf_val;
+ const ir_initializer_t *string;
+ } v;
+} normal_or_bitfield;
+
+static size_t get_initializer_size(const ir_initializer_t *initializer,
+ ir_type *type)
+{
+ 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_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 {
+ 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 size;
+ }
+ }
+
+ panic("found invalid initializer");
+}
+
+#ifndef NDEBUG
+static normal_or_bitfield *glob_vals;
+static size_t max_vals;
+#endif
+
+static void emit_bitfield(normal_or_bitfield *vals, size_t offset_bits,
+ const ir_initializer_t *initializer, ir_type *type)
+{
+ 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:
+ return;
+ case IR_INITIALIZER_TARVAL:
+ tv = get_initializer_tarval_value(initializer);
+ break;
+ case IR_INITIALIZER_CONST: {
+ ir_node *node = get_initializer_const_value(initializer);
+ if (!is_Const(node)) {
+ panic("bitfield initializer not a Const node");
+ }
+ tv = get_Const_tarval(node);
+ break;
+ }
+ case IR_INITIALIZER_COMPOUND:
+ panic("bitfield initializer is compound");
+ }
+ if (tv == NULL) {
+ panic("Couldn't get numeric value for bitfield initializer");
+ }
+ tv = tarval_convert_to(tv, get_type_mode(type));
+
+ 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 emit_ir_initializer(normal_or_bitfield *vals,
+ const ir_initializer_t *initializer,
+ ir_type *type)
+{
+ 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:
+ return;
+ case IR_INITIALIZER_TARVAL: {
+ size_t i;
+
+ 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;
+ }
+ case IR_INITIALIZER_CONST: {
+ size_t i;
+
+ 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;
+ }
+ case IR_INITIALIZER_COMPOUND: {
+ size_t i = 0;
+ size_t n = get_initializer_compound_n_entries(initializer);
+
+ 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) {
+ skip += alignment - misalign;
+ }
+
+ for (i = 0; i < n; ++i) {
+ ir_initializer_t *sub_initializer
+ = get_initializer_compound_value(initializer, i);
+
+ emit_ir_initializer(vals, sub_initializer, element_type);
+
+ vals += skip;
+ }
+ } else {
+ size_t n_members, i;
+ assert(is_compound_type(type));
+ n_members = get_compound_n_members(type);
+ 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);
+ ir_mode *mode = get_type_mode(subtype);
+ ir_initializer_t *sub_initializer;
+
+ assert(i < get_initializer_compound_n_entries(initializer));
+ sub_initializer
+ = get_initializer_compound_value(initializer, i);
+
+ if (mode != NULL) {
+ size_t offset_bits
+ = get_entity_offset_bits_remainder(member);
+
+ 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);
+ }
+ }
+
+ emit_ir_initializer(&vals[offset], sub_initializer, subtype);
}
}
+
+ return;
+ }
+ }
+ panic("invalid ir_initializer kind found");
+}
+
+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();
}
}
/**
- * Dumps declarations of global variables and the initialization code.
+ * Emit an atomic value.
*
- * @param gt a global like type, either the global or the TLS one
- * @param env an environment
- * @param emit_commons if non-zero, emit commons (non-local uninitialized entities)
- * @param only_emit_marked if non-zero, external allocated entities that do not have
- * its visited flag set are ignored
+ * @param env the gas output environment
+ * @param init a node representing the atomic value (on the const code irg)
*/
-static void be_gas_dump_globals(ir_type *gt, be_gas_decl_env_t *env,
- int emit_commons, int only_emit_marked)
-{
- 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);
+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;
+ normal_or_bitfield *vals;
+ size_t size;
+ size_t k;
+
+ if (initializer_is_string_const(initializer)) {
+ emit_string_initializer(initializer);
+ return;
+ }
+
+ type = get_entity_type(entity);
+ size = get_initializer_size(initializer, type);
+
+ if (size == 0)
+ return;
+
+ /*
+ * In the worst case, every initializer allocates one byte.
+ * Moreover, initializer might be big, do not allocate on stack.
+ */
+ vals = XMALLOCNZ(normal_or_bitfield, size);
+
+#ifndef NDEBUG
+ glob_vals = vals;
+ max_vals = size;
+#endif
+
+ emit_ir_initializer(vals, initializer, type);
+
+ /* now write values sorted */
+ for (k = 0; k < size; ) {
+ int space = 0;
+ normal_or_bitfield_kind kind = vals[k].kind;
+ int elem_size;
+ switch (kind) {
+ case NORMAL:
+ if (vals[k].v.value != NULL) {
+ 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;
+ while (k < size && vals[k].kind == NORMAL && vals[k].v.value == NULL) {
+ ++space;
+ ++k;
+ }
+
+ /* a gap */
+ if (space > 0) {
+ be_emit_irprintf("\t.space\t%d, 0\n", space);
+ be_emit_write_line();
+ }
+ }
+ xfree(vals);
+}
+
+static void emit_align(unsigned p2alignment)
+{
+ 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 void emit_common(const ir_entity *entity)
+{
+ 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_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_local_common(const ir_entity *entity)
+{
+ 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_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_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_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 {
- for (i = 0; i < n; i++) {
- ir_entity *ent = get_compound_member(gt, i);
- set_entity_backend_marked(ent, 1);
- waitq_put(worklist, ent);
+ 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 emit_global(be_gas_decl_env_t *env, const ir_entity *entity)
+{
+ 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;
+ }
+
+ 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;
}
}
- env->worklist = worklist;
+ emit_visibility(entity);
- while (!waitq_empty(worklist)) {
- ir_entity *ent = waitq_get(worklist);
+ if (!is_po2(alignment))
+ panic("alignment not a power of 2");
- dump_global(env, ent, emit_commons);
+ emit_section(section, entity);
+
+ if (section == GAS_SECTION_PIC_TRAMPOLINES
+ || section == GAS_SECTION_PIC_SYMBOLS) {
+ emit_indirect_symbol(entity, section);
+ return;
}
- del_waitq(worklist);
- env->worklist = NULL;
+ /* nothing left to do without an initializer */
+ if (!entity_has_definition(entity))
+ return;
+
+ /* alignment */
+ if (alignment > 1) {
+ emit_align(alignment);
+ }
+ if (be_gas_object_file_format == OBJECT_FILE_FORMAT_ELF
+ && be_gas_emit_types
+ && visibility != ir_visibility_private) {
+ be_emit_cstring("\t.type\t");
+ 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_gas_emit_entity(entity);
+ be_emit_irprintf(", %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);
+ }
}
-/************************************************************************/
+/**
+ * Dumps declarations of global variables and the initialization code.
+ *
+ * @param gt a global like type, either the global or the TLS one
+ * @param env an environment
+ */
+static void be_gas_emit_globals(ir_type *gt, be_gas_decl_env_t *env)
+{
+ size_t i, n = get_compound_n_members(gt);
+
+ for (i = 0; i < n; i++) {
+ ir_entity *ent = get_compound_member(gt, i);
+ emit_global(env, ent);
+ }
+}
/* 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;
- obstack_t rodata;
- obstack_t data;
- obstack_t bss;
- obstack_t ctor;
- int size;
- char *cp;
-
- /* dump the global type */
- obstack_init(&rodata);
- obstack_init(&data);
- obstack_init(&bss);
- obstack_init(&ctor);
-
- env.rodata_obst = &rodata;
- env.data_obst = &data;
- env.bss_obst = &bss;
- env.ctor_obst = &ctor;
- env.main_env = main_env;
-
- be_gas_dump_globals(get_glob_type(), &env, 1, only_emit_marked_entities);
-
- size = obstack_object_size(&data);
- cp = obstack_finish(&data);
- if (size > 0) {
- be_gas_emit_switch_section(GAS_SECTION_DATA);
- be_emit_string_len(cp, size);
+ memset(&env, 0, sizeof(env));
+
+ /* dump global type */
+ env.main_env = main_env;
+ env.section = (be_gas_section_t) -1;
+
+ 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
+ * 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();
}
+}
- size = obstack_object_size(&rodata);
- cp = obstack_finish(&rodata);
- if (size > 0) {
- be_gas_emit_switch_section(GAS_SECTION_RODATA);
- be_emit_string_len(cp, size);
- 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;
}
- size = obstack_object_size(&bss);
- cp = obstack_finish(&bss);
- if (size > 0) {
- be_gas_emit_switch_section(GAS_SECTION_COMMON);
- be_emit_string_len(cp, size);
- be_emit_write_line();
+ /* 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;
+ }
}
- size = obstack_object_size(&ctor);
- cp = obstack_finish(&ctor);
- if (size > 0) {
- be_gas_emit_switch_section(GAS_SECTION_CTOR);
- be_emit_string_len(cp, size);
+ /* 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();
}
- obstack_free(&rodata, NULL);
- obstack_free(&data, NULL);
- obstack_free(&bss, NULL);
- obstack_free(&ctor, NULL);
+ if (entity != NULL)
+ be_gas_emit_switch_section(GAS_SECTION_TEXT);
- /* dump the Thread Local Storage */
- obstack_init(&data);
+ xfree(labels);
+ xfree(targets);
+}
- env.rodata_obst = &data;
- env.data_obst = &data;
- env.bss_obst = &data;
- env.ctor_obst = NULL;
+static void emit_global_asms(void)
+{
+ size_t n = get_irp_n_asms();
+ size_t i;
- be_gas_dump_globals(get_tls_type(), &env, 0, only_emit_marked_entities);
+ be_gas_emit_switch_section(GAS_SECTION_TEXT);
+ for (i = 0; i < n; ++i) {
+ ident *asmtext = get_irp_asm(i);
- size = obstack_object_size(&data);
- cp = obstack_finish(&data);
- if (size > 0) {
- be_gas_emit_switch_section(GAS_SECTION_TLS);
- be_emit_cstring(".balign\t32\n");
+ be_emit_cstring("#APP\n");
+ be_emit_write_line();
+ be_emit_irprintf("%I\n", asmtext);
be_emit_write_line();
- be_emit_string_len(cp, size);
+ 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);
- obstack_free(&data, NULL);
+ be_dwarf_unit_end();
+ be_dwarf_close();
}
projects / libfirm / blobdiff