/*
- * Copyright (C) 1995-2007 University of Karlsruhe. All right reserved.
+ * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
*
* This file is part of libFirm.
*
#include "irnode.h"
#include "irprog.h"
#include "pdeq.h"
+#include "entity_t.h"
#include "error.h"
#include "be_t.h"
#include "beemitter.h"
#include "be_dbgout.h"
-typedef struct obstack obstack_t;
-
/** by default, we generate assembler code for the Linux gas */
-be_gas_flavour_t be_gas_flavour = GAS_FLAVOUR_NORMAL;
+be_gas_flavour_t be_gas_flavour = GAS_FLAVOUR_ELF;
+
+static be_gas_section_t current_section = (be_gas_section_t) -1;
/**
* Return the pseudo-instruction to be issued for a section switch
* @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] = {
- {
+ static const char *text[GAS_FLAVOUR_LAST+1][GAS_SECTION_LAST+1] = {
+ { /* GAS_FLAVOUR_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.ctors,\"aw\",@progbits",
+ NULL, /* no cstring section */
+ NULL,
+ NULL
},
- {
+ { /* GAS_FLAVOUR_MINGW */
".section\t.text",
".section\t.data",
".section .rdata,\"dr\"",
".section\t.bss",
".section\t.tbss,\"awT\",@nobits",
- ".section\t.ctors,\"aw\",@progbits"
+ ".section\t.ctors,\"aw\",@progbits",
+ NULL,
+ NULL,
+ NULL
},
- {
+ { /* GAS_FLAVOUR_YASM */
".section\t.text",
- ".section\t.data",
- ".section\t.rodata",
- ".section\t.bss",
- ".section\t.tbss,\"awT\",@nobits",
- ".section\t.ctors,\"aw\",@progbits"
+ ".section\t.data",
+ ".section\t.rodata",
+ ".section\t.bss",
+ ".section\t.tbss,\"awT\",@nobits",
+ ".section\t.ctors,\"aw\",@progbits",
+ NULL,
+ NULL,
+ NULL
+ },
+ { /* GAS_FLAVOUR_MACH_O */
+ ".text",
+ ".data",
+ ".const",
+ ".data",
+ NULL, /* TLS is not supported on Mach-O */
+ ".mod_init_func",
+ ".cstring",
+ ".section\t__IMPORT,__jump_table,symbol_stubs,self_modifying_code+pure_instructions,5",
+ ".section\t__IMPORT,__pointers,non_lazy_symbol_pointers"
}
};
- assert((int) be_gas_flavour >= 0 && be_gas_flavour < GAS_FLAVOUR_MAX);
- assert((int) section >= 0 && section < GAS_SECTION_MAX);
+ assert((int) be_gas_flavour >= 0 && be_gas_flavour <= GAS_FLAVOUR_LAST);
+ assert((int) section >= 0 && section <= GAS_SECTION_LAST);
return text[be_gas_flavour][section];
}
-/**
- * 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) {
+ if(current_section == section)
+ return;
+
be_emit_char('\t');
be_emit_string(get_section_name(section));
be_emit_char('\n');
be_emit_write_line();
+ current_section = section;
+}
+
+void be_gas_emit_function_prolog(ir_entity *entity, unsigned alignment)
+{
+ const char *name = get_entity_ld_name(entity);
+ const char *fill_byte = "";
+ unsigned maximum_skip;
+
+ be_gas_emit_switch_section(GAS_SECTION_TEXT);
+
+ /* write the begin line (used by scripts processing the assembler... */
+ be_emit_write_line();
+ be_emit_cstring("# -- Begin ");
+ be_emit_string(name);
+ be_emit_char('\n');
+ be_emit_write_line();
+
+ /* gcc fills space between function with 0x90, no idea if this is needed */
+ if (be_gas_flavour == GAS_FLAVOUR_MACH_O) {
+ fill_byte = "0x90";
+ }
+
+ if (alignment > 0) {
+ maximum_skip = (1 << alignment) - 1;
+ be_emit_cstring("\t.p2align ");
+ be_emit_irprintf("%u,%s,%u\n", alignment, fill_byte, maximum_skip);
+ be_emit_write_line();
+ }
+ if (get_entity_visibility(entity) == visibility_external_visible) {
+ be_emit_cstring(".globl ");
+ be_emit_string(name);
+ be_emit_char('\n');
+ be_emit_write_line();
+ }
+
+ switch (be_gas_flavour) {
+ case GAS_FLAVOUR_ELF:
+ be_emit_cstring("\t.type\t");
+ be_emit_string(name);
+ be_emit_cstring(", @function\n");
+ be_emit_write_line();
+ break;
+ case GAS_FLAVOUR_MINGW:
+ be_emit_cstring("\t.def\t");
+ be_emit_string(name);
+ be_emit_cstring(";\t.scl\t2;\t.type\t32;\t.endef\n");
+ be_emit_write_line();
+ break;
+ case GAS_FLAVOUR_MACH_O:
+ case GAS_FLAVOUR_YASM:
+ break;
+ }
+ be_emit_string(name);
+ be_emit_cstring(":\n");
+ be_emit_write_line();
+}
+
+void be_gas_emit_function_epilog(ir_entity *entity)
+{
+ const char *name = get_entity_ld_name(entity);
+
+ if (be_gas_flavour == GAS_FLAVOUR_ELF) {
+ be_emit_cstring("\t.size\t");
+ be_emit_string(name);
+ be_emit_cstring(", .-");
+ be_emit_string(name);
+ be_emit_char('\n');
+ be_emit_write_line();
+ }
+
+ be_emit_cstring("# -- End ");
+ be_emit_string(name);
+ be_emit_char('\n');
+ be_emit_write_line();
}
/**
* 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. */
+ be_gas_section_t section;
+ waitq *worklist; /**< A worklist we use to place not yet handled entities on. */
} 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 dump_arith_tarval(tarval *tv, int bytes)
{
switch (bytes) {
-
case 1:
- obstack_printf(obst, "0x%02x", get_tarval_sub_bits(tv, 0));
- break;
+ be_emit_irprintf("0x%02x", get_tarval_sub_bits(tv, 0));
+ return;
case 2:
- obstack_printf(obst, "0x%02x%02x", get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
- break;
+ be_emit_irprintf("0x%02x%02x", get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
+ return;
case 4:
- obstack_printf(obst, "0x%02x%02x%02x%02x",
+ 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));
- break;
+ return;
case 8:
- obstack_printf(obst, "0x%02x%02x%02x%02x%02x%02x%02x%02x",
+ 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));
- break;
+ return;
- case 10:
case 12:
- break;
+ be_emit_irprintf("0x%02x%02x%02x%02x%02x%02x%02x%02x"
+ "%02x%02x%02x%02x", get_tarval_sub_bits(tv, 11),
+ get_tarval_sub_bits(tv, 10), get_tarval_sub_bits(tv, 9),
+ get_tarval_sub_bits(tv, 8), get_tarval_sub_bits(tv, 7),
+ get_tarval_sub_bits(tv, 6), get_tarval_sub_bits(tv, 5),
+ get_tarval_sub_bits(tv, 4), get_tarval_sub_bits(tv, 3),
+ get_tarval_sub_bits(tv, 2), get_tarval_sub_bits(tv, 1),
+ get_tarval_sub_bits(tv, 0));
+ return;
case 16:
- obstack_printf(obst, "0x%02x%02x%02x%02x%02x%02x%02x%02x"
+ be_emit_irprintf("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, 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;
-
-
- default:
- fprintf(stderr, "Try to dump an tarval with %d bytes\n", bytes);
- assert(0);
+ return;
}
+
+ panic("Can't dump a tarval with %d bytes\n", bytes);
}
/**
/**
* Dump a label.
*/
-static void dump_label(obstack_t *obst, ir_label_t label) {
- obstack_printf(obst, "%s%ld", be_gas_label_prefix(), label);
+static void dump_label(ir_label_t label) {
+ be_emit_irprintf("%s%ld", be_gas_label_prefix(), label);
}
/**
* 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 do_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);
ir_label_t label;
ir_entity *ent;
- switch (get_irn_opcode(init)) {
+ init = skip_Id(init);
+ switch (get_irn_opcode(init)) {
case iro_Cast:
- do_dump_atomic_init(env, obst, get_Cast_op(init));
+ do_dump_atomic_init(env, get_Cast_op(init));
return;
case iro_Conv:
- do_dump_atomic_init(env, obst, get_Conv_op(init));
+ do_dump_atomic_init(env, get_Conv_op(init));
return;
case iro_Const:
tv = get_Const_tarval(init);
/* it's a arithmetic value */
- dump_arith_tarval(obst, tv, bytes);
+ dump_arith_tarval(tv, bytes);
return;
case iro_SymConst:
switch (get_SymConst_kind(init)) {
case symconst_addr_name:
- obstack_printf(obst, "%s", get_id_str(get_SymConst_name(init)));
+ be_emit_ident(get_SymConst_name(init));
break;
case symconst_addr_ent:
waitq_put(env->worklist, ent);
set_entity_backend_marked(ent, 1);
}
- obstack_printf(obst, "%s", get_entity_ld_name(ent));
+ be_emit_ident(get_entity_ld_ident(ent));
break;
case symconst_ofs_ent:
set_entity_backend_marked(ent, 1);
}
#endif
- obstack_printf(obst, "%d", get_entity_offset(ent));
+ be_emit_irprintf("%d", get_entity_offset(ent));
break;
case symconst_type_size:
- obstack_printf(obst, "%u", get_type_size_bytes(get_SymConst_type(init)));
+ be_emit_irprintf("%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)));
+ 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));
- dump_arith_tarval(obst, tv, bytes);
+ dump_arith_tarval(tv, bytes);
break;
case symconst_label:
label = get_SymConst_label(init);
- dump_label(obst, label);
+ dump_label(label);
break;
default:
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));
+ if (!mode_is_int(mode) && !mode_is_reference(mode)) {
+ panic("Constant must be int or pointer for '+' to work");
+ }
+ do_dump_atomic_init(env, get_Add_left(init));
+ be_emit_cstring(" + ");
+ do_dump_atomic_init(env, get_Add_right(init));
return;
case iro_Sub:
- do_dump_atomic_init(env, obst, get_Sub_left(init));
- obstack_printf(obst, " - ");
- do_dump_atomic_init(env, obst, get_Sub_right(init));
+ if (!mode_is_int(mode) && !mode_is_reference(mode)) {
+ panic("Constant must be int or pointer for '-' to work");
+ }
+ do_dump_atomic_init(env, get_Sub_left(init));
+ be_emit_cstring(" - ");
+ do_dump_atomic_init(env, get_Sub_right(init));
return;
case iro_Mul:
- do_dump_atomic_init(env, obst, get_Mul_left(init));
- obstack_printf(obst, " * ");
- do_dump_atomic_init(env, obst, get_Mul_right(init));
+ if (!mode_is_int(mode) && !mode_is_reference(mode)) {
+ panic("Constant must be int or pointer for '*' to work");
+ }
+ do_dump_atomic_init(env, get_Mul_left(init));
+ be_emit_cstring(" * ");
+ do_dump_atomic_init(env, get_Mul_right(init));
return;
default:
/**
* 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) {
+static void dump_size_type(size_t size) {
switch (size) {
-
case 1:
- obstack_printf(obst, "\t.byte\t");
+ be_emit_cstring("\t.byte\t");
break;
case 2:
- obstack_printf(obst, "\t.value\t");
+ be_emit_cstring("\t.word\t");
break;
case 4:
- obstack_printf(obst, "\t.long\t");
+ be_emit_cstring("\t.long\t");
break;
case 8:
- obstack_printf(obst, "\t.quad\t");
+ be_emit_cstring("\t.quad\t");
break;
case 10:
break;
case 16:
- obstack_printf(obst, "\t.octa\t");
+ be_emit_cstring("\t.octa\t");
break;
default:
- fprintf(stderr, "Try to dump a type with %d bytes\n", size);
- assert(0);
+ panic("Try to dump a type with %u bytes\n", (unsigned) size);
}
}
/**
- * Dump an atomic value to an obstack.
+ * Emit 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 dump_atomic_init(be_gas_decl_env_t *env, obstack_t *obst,
- ir_node *init)
+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(obst, bytes);
- do_dump_atomic_init(env, obst, init);
- obstack_printf(obst, "\n");
+ 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)
+{
+ 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) != get_mode_size_bits(mode_Bs))
+ return 0;
+
+ c = get_tarval_long(tv);
+ if (isgraph(c) || isspace(c))
+ found_printable = 1;
+ else if(c != 0)
+ return 0;
+
+ if (i == len - 1 && c != '\0')
+ return 0;
+ }
+
+ return found_printable;
+}
+
/**
* Determine if an entity is a string constant
* @param ent The entity
ir_type *type, *element_type;
ir_mode *mode;
int i, c, n;
+ int found_printable = 0;
type = get_entity_type(ent);
|| get_mode_size_bits(mode) != get_mode_size_bits(mode_Bs))
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->has_initializer) {
+ /* TODO */
+ return 0;
+ } else {
+ /* 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;
+ }
}
/* then we can emit it as a string constant */
- return 1;
+ return found_printable;
}
/**
* 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)
+static void dump_string_cst(ir_entity *ent)
{
- int i, n;
+ int i, len;
ir_type *type;
int type_size;
int remaining_space;
- obstack_printf(obst, "\t.string \"");
- n = get_compound_ent_n_values(ent);
+ len = get_compound_ent_n_values(ent);
+ if (be_gas_flavour == GAS_FLAVOUR_MACH_O) {
+ be_emit_cstring("\t.ascii \"");
+ } else {
+ be_emit_cstring("\t.string \"");
+ len -= 1;
+ }
- for (i = 0; i < n-1; ++i) {
+ for (i = 0; i < len; ++i) {
ir_node *irn;
int c;
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;
+ 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))
- obstack_printf(obst, "%c", c);
+ be_emit_char(c);
else
- obstack_printf(obst, "\\%o", c);
+ be_emit_irprintf("\\%o", c);
break;
}
}
- obstack_printf(obst, "\"\n");
+ be_emit_cstring("\"\n");
+ be_emit_write_line();
type = get_entity_type(ent);
type_size = get_type_size_bytes(type);
- remaining_space = type_size - n;
+ remaining_space = type_size - len;
assert(remaining_space >= 0);
if(remaining_space > 0) {
- obstack_printf(obst, "\t.skip\t%d\n", remaining_space);
+ be_emit_irprintf("\t.skip\t%d\n", remaining_space);
+ }
+}
+
+static void dump_string_initializer(const ir_initializer_t *initializer)
+{
+ size_t i, len;
+
+ len = initializer->compound.n_initializers;
+ if(be_gas_flavour == GAS_FLAVOUR_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("\"\n");
+ be_emit_write_line();
}
enum normal_or_bitfield_kind {
NORMAL = 0,
+ TARVAL,
BITFIELD
};
typedef struct {
enum normal_or_bitfield_kind kind;
union {
- ir_node *value;
- unsigned char bf_val;
+ ir_node *value;
+ tarval *tarval;
+ unsigned char bf_val;
} 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)
+{
+ switch(get_initializer_kind(initializer)) {
+ case IR_INITIALIZER_TARVAL: {
+ assert(get_tarval_mode(get_initializer_tarval_value(initializer)) == get_type_mode(type));
+ return get_type_size_bytes(type);
+ }
+ case IR_INITIALIZER_CONST:
+ case IR_INITIALIZER_NULL:
+ return get_type_size_bytes(type);
+ case IR_INITIALIZER_COMPOUND: {
+ if(!is_type_variable_size(type)) {
+ 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;
+ }
+ }
+ return initializer_size;
+ }
+ }
+ }
+
+ panic("found invalid initializer");
+}
+
+#ifndef NDEBUG
+static normal_or_bitfield *glob_vals;
+static size_t max_vals;
+#endif
+
+static void dump_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;
+
+ 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\n");
+ }
+
+ /* 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;
+ }
+}
+
+static void dump_ir_initializer(normal_or_bitfield *vals,
+ const ir_initializer_t *initializer,
+ ir_type *type)
+{
+ assert((size_t) (vals - glob_vals) < max_vals);
+
+ 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->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].v.value = NULL;
+ }
+ return;
+ }
+ case IR_INITIALIZER_CONST: {
+ size_t i;
+
+ assert(vals->kind != BITFIELD);
+ vals->kind = NORMAL;
+ vals->v.value = get_initializer_const_value(initializer);
+ for(i = 1; i < get_type_size_bytes(type); ++i) {
+ vals[i].kind = NORMAL;
+ 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);
+
+ dump_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);
+ 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,
+ sub_initializer, subtype);
+ continue;
+ }
+ }
+
+ dump_ir_initializer(&vals[offset], sub_initializer, subtype);
+ }
+ }
+
+ return;
+ }
+ }
+ panic("invalid ir_initializer kind found");
+}
+
+static void dump_initializer(be_gas_decl_env_t *env, ir_entity *entity)
+{
+ const ir_initializer_t *initializer = entity->attr.initializer;
+ ir_type *type;
+ normal_or_bitfield *vals;
+ size_t size;
+ size_t k;
+
+ if(initializer_is_string_const(initializer)) {
+ dump_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 = xcalloc(size, sizeof(vals[0]));
+
+#ifndef NDEBUG
+ glob_vals = vals;
+ max_vals = size;
+#endif
+
+ dump_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) {
+ 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);
+ be_emit_irprintf("\t.byte\t%d\n", vals[k].v.bf_val);
+ be_emit_write_line();
+ }
+
+ 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.skip\t%d\n", space);
+ be_emit_write_line();
+ }
+ }
+ xfree(vals);
+}
+
/**
* Dump an initializer for a compound entity.
*/
-static void dump_compound_init(be_gas_decl_env_t *env, obstack_t *obst,
- ir_entity *ent)
+static void dump_compound_init(be_gas_decl_env_t *env, ir_entity *ent)
{
normal_or_bitfield *vals;
- int i, j, n = get_compound_ent_n_values(ent);
+ int i, j, n;
unsigned k, last_ofs;
+ if(ent->has_initializer) {
+ dump_initializer(env, 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. */
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);
+ 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);
- obstack_printf(obst, "\t.byte\t%d\n", vals[k].v.bf_val);
+ be_emit_irprintf("\t.byte\t%d\n", vals[k].v.bf_val);
}
++k;
assert(space >= 0);
/* a gap */
- if (space > 0)
- obstack_printf(obst, "\t.skip\t%d\n", space);
+ if (space > 0) {
+ be_emit_irprintf("\t.skip\t%d\n", space);
+ be_emit_write_line();
+ }
}
xfree(vals);
}
+static void emit_align(unsigned alignment)
+{
+ if (!is_po2(alignment))
+ panic("alignment not a power of 2");
+
+ be_emit_irprintf(".p2align\t%u\n", log2_floor(alignment));
+ 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)
+static void dump_global(be_gas_decl_env_t *env, ir_entity *ent)
{
- 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);
- }
+ ir_type *type = get_entity_type(ent);
+ ident *ld_ident = get_entity_ld_ident(ent);
+ unsigned align = get_type_alignment_bytes(type);
+ int emit_as_common = 0;
+ be_gas_section_t section = env->section;
+ ir_variability variability = get_entity_variability(ent);
+ ir_visibility visibility = get_entity_visibility(ent);
+
+ if (is_Method_type(type) && section != GAS_SECTION_PIC_TRAMPOLINES) {
return;
}
- variability = get_entity_variability(ent);
- visibility = get_entity_visibility(ent);
- if (variability == variability_constant) {
+ if (section != (be_gas_section_t) -1) {
+ emit_as_common = 0;
+ } else if (variability == variability_constant) {
/* a constant entity, put it on the rdata */
- obst = env->rodata_obst;
+ section = GAS_SECTION_RODATA;
+ if (be_gas_flavour == GAS_FLAVOUR_MACH_O
+ && ent_is_string_const(ent)) {
+ section = GAS_SECTION_CSTRING;
+ }
} else if (variability == variability_uninitialized) {
/* uninitialized entity put it in bss segment */
- obst = env->bss_obst;
- if (emit_commons && visibility != visibility_local)
+ section = GAS_SECTION_COMMON;
+ if (visibility != visibility_local)
emit_as_common = 1;
+ } else {
+ section = GAS_SECTION_DATA;
}
- be_dbg_variable(env->main_env->db_handle, obst, ent);
+ if(!emit_as_common) {
+ be_gas_emit_switch_section(section);
+ }
+
+ be_dbg_variable(ent);
/* global or not global */
if (visibility == visibility_external_visible && !emit_as_common) {
- obstack_printf(obst, ".global\t%s\n", ld_name);
+ be_emit_cstring(".globl\t");
+ be_emit_ident(ld_ident);
+ be_emit_char('\n');
+ be_emit_write_line();
} else if(visibility == visibility_external_allocated) {
- obstack_printf(obst, ".global\t%s\n", ld_name);
+ be_emit_cstring(".globl\t");
+ be_emit_ident(ld_ident);
+ be_emit_char('\n');
+ be_emit_write_line();
/* we can return now... */
return;
}
/* alignment */
- if (align > 1 && !emit_as_common) {
- obstack_printf(obst, ".balign\t%u\n", align);
+ if (align > 1 && !emit_as_common && section != GAS_SECTION_PIC_TRAMPOLINES
+ && section != GAS_SECTION_PIC_SYMBOLS) {
+ emit_align(align);
}
if (!emit_as_common) {
- obstack_printf(obst, "%s:\n", ld_name);
+ be_emit_ident(ld_ident);
+ be_emit_cstring(":\n");
+ be_emit_write_line();
}
if (variability == variability_uninitialized) {
if (emit_as_common) {
switch (be_gas_flavour) {
- case GAS_FLAVOUR_NORMAL:
+ case GAS_FLAVOUR_ELF:
+ case GAS_FLAVOUR_MACH_O:
case GAS_FLAVOUR_YASM:
- obstack_printf(obst, "\t.comm %s,%u,%u\n",
- ld_name, get_type_size_bytes(type), align);
+ be_emit_irprintf("\t.comm %s,%u,%u\n",
+ get_id_str(ld_ident), get_type_size_bytes(type), align);
+ be_emit_write_line();
break;
case GAS_FLAVOUR_MINGW:
- obstack_printf(obst, "\t.comm %s,%u # %u\n",
- ld_name, get_type_size_bytes(type), align);
+ be_emit_irprintf("\t.comm %s,%u # %u\n",
+ get_id_str(ld_ident), get_type_size_bytes(type), align);
+ be_emit_write_line();
break;
}
+ } else if (section == GAS_SECTION_PIC_TRAMPOLINES) {
+ if (be_gas_flavour == GAS_FLAVOUR_MACH_O) {
+ be_emit_cstring("\t.indirect_symbol ");
+ be_emit_ident(get_entity_ident(ent));
+ be_emit_char('\n');
+ be_emit_write_line();
+ be_emit_cstring("\thlt ; hlt ; hlt ; hlt ; hlt\n");
+ be_emit_write_line();
+ } else {
+ panic("PIC trampolines not yet supported in this gas mode");
+ }
} else {
- obstack_printf(obst, "\t.zero %u\n", get_type_size_bytes(type));
+ be_emit_irprintf("\t.space %u\n", get_type_size_bytes(type));
+ be_emit_write_line();
}
} else {
if (is_atomic_entity(ent)) {
- dump_atomic_init(env, obst, get_atomic_ent_value(ent));
+ dump_atomic_init(env, get_atomic_ent_value(ent));
} else {
/* sort_compound_ent_values(ent); */
switch (get_type_tpop_code(get_entity_type(ent))) {
case tpo_array:
if (ent_is_string_const(ent))
- dump_string_cst(obst, ent);
+ dump_string_cst(ent);
else
- dump_compound_init(env, obst, ent);
+ dump_compound_init(env, ent);
break;
case tpo_struct:
case tpo_class:
case tpo_union:
- dump_compound_init(env, obst, ent);
+ dump_compound_init(env, ent);
break;
default:
assert(0);
*
* @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
*/
static void be_gas_dump_globals(ir_type *gt, be_gas_decl_env_t *env,
- int emit_commons, int only_emit_marked)
+ int only_emit_marked)
{
int i, n = get_compound_n_members(gt);
waitq *worklist = new_waitq();
while (!waitq_empty(worklist)) {
ir_entity *ent = waitq_get(worklist);
- dump_global(env, ent, emit_commons);
+ dump_global(env, ent);
}
del_waitq(worklist);
int only_emit_marked_entities)
{
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);
- 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();
- }
-
- 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();
- }
-
- 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);
- be_emit_write_line();
- }
-
- obstack_free(&rodata, NULL);
- obstack_free(&data, NULL);
- obstack_free(&bss, NULL);
- obstack_free(&ctor, NULL);
-
- /* dump the Thread Local Storage */
- obstack_init(&data);
-
- env.rodata_obst = &data;
- env.data_obst = &data;
- env.bss_obst = &data;
- env.ctor_obst = NULL;
-
- be_gas_dump_globals(get_tls_type(), &env, 0, only_emit_marked_entities);
-
- 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_write_line();
- be_emit_string_len(cp, size);
- be_emit_write_line();
+ memset(&env, 0, sizeof(env));
+
+ env.main_env = main_env;
+
+ /* dump global type */
+ env.section = (be_gas_section_t) -1;
+ be_gas_dump_globals(get_glob_type(), &env, only_emit_marked_entities);
+ env.section = GAS_SECTION_TLS;
+ be_gas_dump_globals(get_tls_type(), &env, only_emit_marked_entities);
+ env.section = GAS_SECTION_CTOR;
+ be_gas_dump_globals(get_constructors_type(), &env,
+ only_emit_marked_entities);
+ env.section = GAS_SECTION_PIC_SYMBOLS;
+ be_gas_dump_globals(main_env->pic_symbols_type, &env,
+ only_emit_marked_entities);
+
+ if (get_compound_n_members(main_env->pic_trampolines_type) > 0) {
+ env.section = GAS_SECTION_PIC_TRAMPOLINES;
+ be_gas_dump_globals(main_env->pic_trampolines_type, &env,
+ only_emit_marked_entities);
+ if (be_gas_flavour == GAS_FLAVOUR_MACH_O) {
+ be_emit_cstring("\t.subsections_via_symbols\n");
+ be_emit_write_line();
+ }
}
-
- obstack_free(&data, NULL);
}
projects / libfirm / blobdiff