2 * emit-x86.c: Support functions for emitting x86 code
5 * Dietmar Maurer (dietmar@ximian.com)
6 * Miguel de Icaza (miguel@ximian.com)
8 * (C) 2001 Ximian, Inc.
14 #include <mono/metadata/assembly.h>
15 #include <mono/metadata/loader.h>
16 #include <mono/metadata/cil-coff.h>
17 #include <mono/metadata/tabledefs.h>
18 #include <mono/metadata/class.h>
19 #include <mono/metadata/mono-endian.h>
20 #include <mono/arch/x86/x86-codegen.h>
27 enter_method (MonoMethod *method, gpointer ebp)
33 printf ("ENTER: %s.%s::%s\n(", method->klass->name_space,
34 method->klass->name, method->name);
37 if (((int)ebp & 3) != 0) {
38 g_error ("unaligned stack detected (%p)", ebp);
43 if (ISSTRUCT (method->signature->ret)) {
46 g_assert (!method->signature->ret->byref);
48 size = mono_type_stack_size (method->signature->ret, &align);
50 printf ("VALUERET:%p, ", *((gpointer *)ebp));
51 ebp += sizeof (gpointer);
54 if (method->signature->hasthis) {
55 if (method->klass->valuetype) {
56 printf ("value:%p, ", *((gpointer *)ebp));
58 o = *((MonoObject **)ebp);
62 class = o->vtable->klass;
64 if (class == mono_defaults.string_class) {
65 printf ("this:[STRING:%p:%s], ", o, mono_string_to_utf8 ((MonoString *)o));
67 printf ("this:%p[%s.%s], ", o, class->name_space, class->name);
70 ebp += sizeof (gpointer);
73 for (i = 0; i < method->signature->param_count; ++i) {
74 MonoType *type = method->signature->params [i];
76 size = mono_type_stack_size (type, &align);
79 printf ("[BYREF:%p], ", *((gpointer *)ebp));
80 } else switch (type->type) {
82 case MONO_TYPE_BOOLEAN:
92 printf ("%d, ", *((int *)(ebp)));
94 case MONO_TYPE_STRING: {
95 MonoString *s = *((MonoString **)ebp);
97 g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
98 printf ("[STRING:%p:%s], ", s, mono_string_to_utf8 (s));
100 printf ("[STRING:null], ");
103 case MONO_TYPE_CLASS:
104 case MONO_TYPE_OBJECT: {
105 o = *((MonoObject **)ebp);
107 class = o->vtable->klass;
109 if (class == mono_defaults.string_class) {
110 printf ("[STRING:%p:%s], ", o, mono_string_to_utf8 ((MonoString *)o));
111 } else if (class == mono_defaults.int32_class) {
112 printf ("[INT32:%p:%d], ", o, *(gint32 *)((gpointer)o + sizeof (MonoObject)));
114 printf ("[%s.%s:%p], ", class->name_space, class->name, o);
116 printf ("%p, ", *((gpointer *)(ebp)));
121 case MONO_TYPE_FNPTR:
122 case MONO_TYPE_ARRAY:
123 case MONO_TYPE_SZARRAY:
124 printf ("%p, ", *((gpointer *)(ebp)));
127 printf ("%lld, ", *((gint64 *)(ebp)));
130 printf ("%f, ", *((float *)(ebp)));
133 printf ("%f, ", *((double *)(ebp)));
135 case MONO_TYPE_VALUETYPE:
137 for (j = 0; j < size; j++)
138 printf ("%02x,", *((guint8*)ebp +j));
145 g_assert (align == 4);
147 ebp = (gpointer)((unsigned)ebp & ~(3));
154 leave_method (MonoMethod *method, int edx, int eax, double test)
158 printf ("LEAVE: %s.%s::%s ", method->klass->name_space,
159 method->klass->name, method->name);
161 switch (method->signature->ret->type) {
164 case MONO_TYPE_BOOLEAN:
166 printf ("TRUE:%d", eax);
180 printf ("EAX=%d", eax);
182 case MONO_TYPE_STRING: {
183 MonoString *s = (MonoString *)eax;
186 g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
187 printf ("[STRING:%p:%s]", s, mono_string_to_utf8 (s));
189 printf ("[STRING:null], ");
192 case MONO_TYPE_OBJECT: {
193 MonoObject *o = (MonoObject *)eax;
196 if (o->vtable->klass == mono_defaults.boolean_class) {
197 printf ("[BOOLEAN:%p:%d]", o, *((guint8 *)o + sizeof (MonoObject)));
198 } else if (o->vtable->klass == mono_defaults.int32_class) {
199 printf ("[INT32:%p:%d]", o, *((gint32 *)((gpointer)o + sizeof (MonoObject))));
201 printf ("[%s.%s:%p]", o->vtable->klass->name_space, o->vtable->klass->name, o);
203 printf ("[OBJECT:%p]", o);
207 case MONO_TYPE_CLASS:
209 case MONO_TYPE_FNPTR:
210 case MONO_TYPE_ARRAY:
211 case MONO_TYPE_SZARRAY:
212 printf ("EAX=%p", (gpointer)eax);
215 *((gint32 *)&l) = eax;
216 *((gint32 *)&l + 1) = edx;
217 printf ("EAX/EDX=%lld", l);
220 printf ("FP=%f\n", test);
223 printf ("(unknown return type)");
230 * arch_emit_prologue:
231 * @cfg: pointer to status information
233 * Emits the function prolog.
236 arch_emit_prologue (MonoFlowGraph *cfg)
238 x86_push_reg (cfg->code, X86_EBP);
239 x86_mov_reg_reg (cfg->code, X86_EBP, X86_ESP, 4);
241 if (cfg->locals_size)
242 x86_alu_reg_imm (cfg->code, X86_SUB, X86_ESP, cfg->locals_size);
244 if (mono_regset_reg_used (cfg->rs, X86_EBX))
245 x86_push_reg (cfg->code, X86_EBX);
247 if (mono_regset_reg_used (cfg->rs, X86_EDI))
248 x86_push_reg (cfg->code, X86_EDI);
250 if (mono_regset_reg_used (cfg->rs, X86_ESI))
251 x86_push_reg (cfg->code, X86_ESI);
253 if (mono_jit_trace_calls) {
254 x86_push_reg (cfg->code, X86_EBP);
255 x86_push_imm (cfg->code, cfg->method);
256 x86_mov_reg_imm (cfg->code, X86_EAX, enter_method);
257 x86_call_reg (cfg->code, X86_EAX);
258 x86_alu_reg_imm (cfg->code, X86_ADD, X86_ESP, 8);
263 * arch_emit_epilogue:
264 * @cfg: pointer to status information
266 * Emits the function epilog.
269 arch_emit_epilogue (MonoFlowGraph *cfg)
271 if (mono_jit_trace_calls) {
272 x86_fld_reg (cfg->code, 0);
273 x86_alu_reg_imm (cfg->code, X86_SUB, X86_ESP, 8);
274 x86_fst_membase (cfg->code, X86_ESP, 0, TRUE, TRUE);
275 x86_push_reg (cfg->code, X86_EAX);
276 x86_push_reg (cfg->code, X86_EDX);
277 x86_push_imm (cfg->code, cfg->method);
278 x86_mov_reg_imm (cfg->code, X86_EAX, leave_method);
279 x86_call_reg (cfg->code, X86_EAX);
280 x86_alu_reg_imm (cfg->code, X86_ADD, X86_ESP, 4);
281 x86_pop_reg (cfg->code, X86_EDX);
282 x86_pop_reg (cfg->code, X86_EAX);
283 x86_alu_reg_imm (cfg->code, X86_ADD, X86_ESP, 8);
286 if (mono_regset_reg_used (cfg->rs, X86_ESI))
287 x86_pop_reg (cfg->code, X86_ESI);
289 if (mono_regset_reg_used (cfg->rs, X86_EDI))
290 x86_pop_reg (cfg->code, X86_EDI);
292 if (mono_regset_reg_used (cfg->rs, X86_EBX))
293 x86_pop_reg (cfg->code, X86_EBX);
295 x86_leave (cfg->code);
300 * get_unbox_trampoline:
303 * when value type methods are called through the vtable we need to unbox the
304 * this argument. This method returns a pointer to a trampoline which does
305 * unboxing before calling the method
308 get_unbox_trampoline (MonoMethod *m)
310 gpointer p = arch_compile_method (m);
311 guint8 *code, *start;
314 if (!m->signature->ret->byref && m->signature->ret->type == MONO_TYPE_VALUETYPE)
317 start = code = g_malloc (16);
319 x86_alu_membase_imm (code, X86_ADD, X86_ESP, this_pos, sizeof (MonoObject));
320 x86_jump_code (code, p);
321 g_assert ((code - start) < 16);
327 * x86_magic_trampoline:
328 * @eax: saved x86 register
329 * @ecx: saved x86 register
330 * @edx: saved x86 register
331 * @esi: saved x86 register
332 * @edi: saved x86 register
333 * @ebx: saved x86 register
334 * @code: pointer into caller code
335 * @method: the method to translate
337 * This method is called by the trampoline functions for virtual
338 * methods. It inspects the caller code to find the address of the
339 * vtable slot, then calls the JIT compiler and writes the address
340 * of the compiled method back to the vtable. All virtual methods
341 * are called with: x86_call_membase (inst, basereg, disp). We always
342 * use 32 bit displacement to ensure that the length of the call
343 * instruction is 6 bytes. We need to get the value of the basereg
344 * and the constant displacement.
347 x86_magic_trampoline (int eax, int ecx, int edx, int esi, int edi,
348 int ebx, const guint8 *code, MonoMethod *m)
354 /* go to the start of the call instruction
356 * address_byte = (m << 6) | (o << 3) | reg
357 * call opcode: 0xff address_byte displacement
362 if ((code [1] != 0xe8) && (code [3] == 0xff) && ((code [4] & 0x18) == 0x10) && ((code [4] >> 6) == 1)) {
363 reg = code [4] & 0x07;
364 disp = (signed char)code [5];
366 if ((code [0] == 0xff) && ((code [1] & 0x18) == 0x10) && ((code [1] >> 6) == 2)) {
367 reg = code [1] & 0x07;
368 disp = *((gint32*)(code + 2));
369 } else if ((code [1] == 0xe8)) {
370 gpointer addr = arch_compile_method (m);
372 *((guint32*)(code + 2)) = (guint)addr - ((guint)code + 1) - 5;
375 printf ("%x %x %x %x %x %x \n", code [0], code [1], code [2], code [3],
377 g_assert_not_reached ();
401 g_assert_not_reached ();
406 if (m->klass->valuetype) {
407 return *((gpointer *)o) = get_unbox_trampoline (m);
409 return *((gpointer *)o) = arch_compile_method (m);
413 * arch_create_jit_trampoline:
414 * @method: pointer to the method info
416 * Creates a trampoline function for virtual methods. If the created
417 * code is called it first starts JIT compilation of method,
418 * and then calls the newly created method. I also replaces the
419 * corresponding vtable entry (see x86_magic_trampoline).
421 * Returns: a pointer to the newly created code
424 arch_create_jit_trampoline (MonoMethod *method)
426 MonoDomain *domain = mono_domain_get ();
428 static guint8 *vc = NULL;
429 GHashTable *jit_code_hash;
431 /* icalls use method->addr */
435 /* previously created trampoline code */
439 /* check if we already have JITed code */
440 if (mono_jit_share_code)
441 jit_code_hash = mono_root_domain->jit_code_hash;
443 jit_code_hash = domain->jit_code_hash;
445 if ((code = g_hash_table_lookup (jit_code_hash, method))) {
446 mono_jit_stats.methods_lookups++;
451 vc = buf = g_malloc (256);
454 x86_push_reg (buf, X86_EBX);
455 x86_push_reg (buf, X86_EDI);
456 x86_push_reg (buf, X86_ESI);
457 x86_push_reg (buf, X86_EBP);
459 /* save the IP (caller ip) */
460 x86_push_membase (buf, X86_ESP, 20);
462 /* save method info */
463 x86_push_membase (buf, X86_ESP, 20);
464 /* get the address of lmf for the current thread */
465 x86_call_code (buf, arch_get_lmf_addr);
467 x86_push_reg (buf, X86_EAX);
468 /* push *lfm (previous_lmf) */
469 x86_push_membase (buf, X86_EAX, 0);
471 x86_mov_membase_reg (buf, X86_EAX, 0, X86_ESP, 4);
474 /* push the method info */
475 x86_push_membase (buf, X86_ESP, 32);
476 /* push the return address onto the stack */
477 x86_push_membase (buf, X86_ESP, 40);
479 /* save all register values */
480 x86_push_reg (buf, X86_EBX);
481 x86_push_reg (buf, X86_EDI);
482 x86_push_reg (buf, X86_ESI);
483 x86_push_reg (buf, X86_EDX);
484 x86_push_reg (buf, X86_ECX);
485 x86_push_reg (buf, X86_EAX);
487 x86_call_code (buf, x86_magic_trampoline);
488 x86_alu_reg_imm (buf, X86_ADD, X86_ESP, 8*4);
490 /* restore LMF start */
491 /* ebx = previous_lmf */
492 x86_pop_reg (buf, X86_EBX);
494 x86_pop_reg (buf, X86_EDI);
495 /* *(lmf) = previous_lmf */
496 x86_mov_membase_reg (buf, X86_EDI, 0, X86_EBX, 4);
497 /* discard method info */
498 x86_pop_reg (buf, X86_ESI);
499 /* discard save IP */
500 x86_pop_reg (buf, X86_ESI);
501 /* restore caller saved regs */
502 x86_pop_reg (buf, X86_EBP);
503 x86_pop_reg (buf, X86_ESI);
504 x86_pop_reg (buf, X86_EDI);
505 x86_pop_reg (buf, X86_EBX);
506 /* restore LMF end */
508 x86_alu_reg_imm (buf, X86_ADD, X86_ESP, 4);
510 /* call the compiled method */
511 x86_jump_reg (buf, X86_EAX);
513 g_assert ((buf - vc) <= 256);
516 code = buf = g_malloc (16);
517 x86_push_imm (buf, method);
518 x86_jump_code (buf, vc);
519 g_assert ((buf - code) <= 16);
521 /* store trampoline address */
524 mono_jit_stats.method_trampolines++;
530 mono_label_cfg (MonoFlowGraph *cfg)
534 for (i = 0; i < cfg->block_count; i++) {
535 GPtrArray *forest = cfg->bblocks [i].forest;
538 if (!cfg->bblocks [i].reached) /* unreachable code */
543 for (j = 0; j < top; j++) {
544 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, j);
547 mbstate = mono_burg_label (t1, cfg);
550 if (mono_debug_handle)
552 g_warning ("tree does not match");
553 mono_print_ctree (t1); printf ("\n\n");
555 mono_print_forest (forest);
556 g_assert_not_reached ();
563 tree_preallocate_regs (MBTree *tree, int goal, MonoRegSet *rs)
566 case MB_TERM_CALL_I4:
567 case MB_TERM_CALL_I8:
568 case MB_TERM_CALL_R8:
569 // case MB_TERM_CALL_VOID :
570 tree->reg1 = mono_regset_alloc_reg (rs, X86_EAX, tree->exclude_mask);
571 tree->reg2 = mono_regset_alloc_reg (rs, X86_EDX, tree->exclude_mask);
572 tree->reg3 = mono_regset_alloc_reg (rs, X86_ECX, tree->exclude_mask);
579 case MB_NTERM_lreg: {
584 tree->exclude_mask |= (1 << X86_ECX);
585 tree->left->exclude_mask |= (1 << X86_ECX);
588 case MB_TERM_MUL_OVF:
589 case MB_TERM_MUL_OVF_UN:
594 tree->reg1 = mono_regset_alloc_reg (rs, X86_EAX, tree->exclude_mask);
595 tree->reg2 = mono_regset_alloc_reg (rs, X86_EDX, tree->exclude_mask);
596 if (goal == MB_NTERM_reg) {
597 tree->left->exclude_mask |= (1 << X86_EDX);
598 tree->right->exclude_mask |= (1 << X86_EDX) | (1 << X86_EAX);
612 tree_allocate_regs (MBTree *tree, int goal, MonoRegSet *rs)
615 int ern = mono_burg_rule (tree->state, goal);
616 const guint16 *nts = mono_burg_nts [ern];
619 mono_burg_kids (tree, ern, kids);
621 //printf ("RALLOC START %d %p %d\n", tree->op, rs->free_mask, goal);
623 if (nts [0] && kids [0] == tree) {
625 tree_allocate_regs (kids [0], nts [0], rs);
629 for (i = 0; nts [i]; i++)
630 tree_preallocate_regs (kids [i], nts [i], rs);
632 for (i = 0; nts [i]; i++)
633 tree_allocate_regs (kids [i], nts [i], rs);
635 for (i = 0; nts [i]; i++) {
636 mono_regset_free_reg (rs, kids [i]->reg1);
637 mono_regset_free_reg (rs, kids [i]->reg2);
638 mono_regset_free_reg (rs, kids [i]->reg3);
643 if (tree->reg1 < 0) {
644 tree->reg1 = mono_regset_alloc_reg (rs, -1, tree->exclude_mask);
645 g_assert (tree->reg1 != -1);
650 if (tree->reg1 < 0) {
651 tree->reg1 = mono_regset_alloc_reg (rs, -1, tree->exclude_mask);
652 g_assert (tree->reg1 != -1);
654 if (tree->reg2 < 0) {
655 tree->reg2 = mono_regset_alloc_reg (rs, -1, tree->exclude_mask);
656 g_assert (tree->reg2 != -1);
661 /* fixme: allocate floating point registers */
665 if (tree->op == MB_TERM_ADD) {
666 tree->reg1 = mono_regset_alloc_reg (rs, tree->left->reg1, tree->exclude_mask);
667 tree->reg2 = mono_regset_alloc_reg (rs, tree->right->reg1, tree->exclude_mask);
672 if (tree->op == MB_TERM_ADD) {
673 tree->reg1 = mono_regset_alloc_reg (rs, tree->left->reg1, tree->exclude_mask);
678 if (tree->op == MB_TERM_SHL ||
679 tree->op == MB_TERM_MUL) {
680 tree->reg1 = mono_regset_alloc_reg (rs, tree->left->reg1, tree->exclude_mask);
688 //printf ("RALLOC END %d %p\n", tree->op, rs->free_mask);
689 tree->emit = mono_burg_func [ern];
693 arch_allocate_regs (MonoFlowGraph *cfg)
697 for (i = 0; i < cfg->block_count; i++) {
698 GPtrArray *forest = cfg->bblocks [i].forest;
701 if (!cfg->bblocks [i].reached) /* unreachable code */
706 for (j = 0; j < top; j++) {
707 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, j);
708 //printf ("AREGSTART %d:%d %p\n", i, j, cfg->rs->free_mask);
709 tree_allocate_regs (t1, 1, cfg->rs);
710 //printf ("AREGENDT %d:%d %p\n", i, j, cfg->rs->free_mask);
711 g_assert (cfg->rs->free_mask == 0xffffffff);
717 tree_emit (int goal, MonoFlowGraph *cfg, MBTree *tree)
720 int i, ern = mono_burg_rule (tree->state, goal);
721 const guint16 *nts = mono_burg_nts [ern];
725 mono_burg_kids (tree, ern, kids);
727 for (i = 0; nts [i]; i++)
728 tree_emit (nts [i], cfg, kids [i]);
730 tree->addr = offset = cfg->code - cfg->start;
732 // we assume an instruction uses a maximum of 128 bytes
733 if ((cfg->code_size - offset) <= 128) {
734 int add = MIN ((cfg->code_size * 2), 1024);
736 cfg->code_size += add;
737 mono_jit_stats.allocated_code_size += add;
738 mono_jit_stats.code_reallocs++;
739 cfg->start = g_realloc (cfg->start, cfg->code_size);
740 g_assert (cfg->start);
741 cfg->code = cfg->start + offset;
744 if ((emit = mono_burg_func [ern]))
747 g_assert ((cfg->code - cfg->start) < cfg->code_size);
751 mono_emit_cfg (MonoFlowGraph *cfg)
755 for (i = 0; i < cfg->block_count; i++) {
756 MonoBBlock *bb = &cfg->bblocks [i];
757 GPtrArray *forest = bb->forest;
760 if (!bb->reached) /* unreachable code */
765 bb->addr = cfg->code - cfg->start;
767 for (j = 0; j < top; j++) {
768 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, j);
770 tree_emit (1, cfg, t1);
774 cfg->epilog = cfg->code - cfg->start;
778 mono_compute_branches (MonoFlowGraph *cfg)
786 for (j = 0; j < cfg->block_count; j++) {
787 MonoBBlock *bb = &cfg->bblocks [j];
788 GPtrArray *forest = bb->forest;
791 if (!bb->reached) /* unreachable code */
796 for (i = 0; i < top; i++) {
797 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, i);
799 if (t1->op == MB_TERM_SWITCH) {
800 MonoBBlock **jt = (MonoBBlock **)t1->data.p;
801 guint32 *rt = (guint32 *)t1->data.p;
803 int m = *((guint32 *)t1->data.p) + 1;
806 for (j = 1; j <= m; j++)
807 rt [j] = (int)(jt [j]->addr + cfg->start);
809 /* emit the switch instruction again to update addresses */
810 cfg->code = cfg->start + t1->addr;
811 ((MBEmitFunc)t1->emit) (t1, cfg);
818 for (ji = cfg->jump_info; ji; ji = ji->next) {
819 gpointer *ip = GUINT_TO_POINTER (GPOINTER_TO_UINT (ji->ip) + cfg->start);
825 target = ji->bb->addr + cfg->start;
827 /* special case - jump to epilog */
828 target = cfg->epilog + cfg->start;
830 *ip = target - GPOINTER_TO_UINT(ip) - 4;
835 mono_add_jump_info (MonoFlowGraph *cfg, gpointer ip, gpointer target, MonoBBlock *bb)
837 MonoJumpInfo *ji = mono_mempool_alloc (cfg->mp, sizeof (MonoJumpInfo));
839 ji->ip = GUINT_TO_POINTER (GPOINTER_TO_UINT (ip) - GPOINTER_TO_UINT (cfg->start));
841 ji->next = cfg->jump_info;
848 match_debug_method (MonoMethod* method)
850 GList *tmp = mono_debug_methods;
852 for (; tmp; tmp = tmp->next) {
853 if (strcmp (method->name, tmp->data) == 0) {
861 * arch_compile_method:
862 * @method: pointer to the method info
864 * JIT compilation of a single method.
866 * Returns: a pointer to the newly created code.
869 arch_compile_method (MonoMethod *method)
871 MonoDomain *domain = mono_domain_get ();
875 GHashTable *jit_code_hash;
877 g_assert (!(method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL));
878 g_assert (!(method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL));
880 if (mono_jit_share_code)
881 jit_code_hash = mono_root_domain->jit_code_hash;
883 jit_code_hash = domain->jit_code_hash;
885 if ((addr = g_hash_table_lookup (jit_code_hash, method))) {
886 mono_jit_stats.methods_lookups++;
890 mono_jit_stats.methods_compiled++;
892 mp = mono_mempool_new ();
894 if (mono_jit_trace_calls || mono_jit_dump_asm || mono_jit_dump_forest) {
895 printf ("Start JIT compilation of %s.%s:%s\n", method->klass->name_space,
896 method->klass->name, method->name);
899 if (method->iflags & METHOD_IMPL_ATTRIBUTE_RUNTIME) {
900 MonoClassField *field;
901 const char *name = method->name;
902 static guint target_offset = 0;
903 static guint method_offset = 0;
905 gboolean delegate = FALSE;
907 if (method->klass->parent &&
908 method->klass->parent->parent == mono_defaults.delegate_class)
911 if (!target_offset) {
912 mono_class_init (mono_defaults.delegate_class);
914 field = mono_class_get_field_from_name (mono_defaults.delegate_class, "m_target");
915 target_offset = field->offset;
916 field = mono_class_get_field_from_name (mono_defaults.delegate_class, "method_ptr");
917 method_offset = field->offset;
920 if (delegate && *name == '.' && (strcmp (name, ".ctor") == 0)) {
921 addr = code = g_malloc (32);
922 x86_push_reg (code, X86_EBP);
923 x86_mov_reg_reg (code, X86_EBP, X86_ESP, 4);
925 /* load the this pointer */
926 x86_mov_reg_membase (code, X86_EAX, X86_EBP, 8, 4);
927 /* load m_target arg */
928 x86_mov_reg_membase (code, X86_EDX, X86_EBP, 12, 4);
930 x86_mov_membase_reg (code, X86_EAX, target_offset, X86_EDX, 4);
931 /* load method_ptr arg */
932 x86_mov_reg_membase (code, X86_EDX, X86_EBP, 16, 4);
933 /* store method_ptr */
934 x86_mov_membase_reg (code, X86_EAX, method_offset, X86_EDX, 4);
939 g_assert ((code - (guint8*)addr) < 32);
941 } else if (delegate && *name == 'I' && (strcmp (name, "Invoke") == 0)) {
942 MonoMethodSignature *csig = method->signature;
943 int i, arg_size, target, this_pos = 4;
946 if (csig->ret->type == MONO_TYPE_VALUETYPE) {
947 g_assert (!csig->ret->byref);
952 if (csig->param_count) {
955 for (i = 0; i < csig->param_count; ++i) {
956 arg_size += mono_type_stack_size (csig->params [i], &align);
957 g_assert (align == 4);
961 addr = g_malloc (64 + arg_size);
963 for (i = 0; i < 2; i ++) {
967 /* load the this pointer */
968 x86_mov_reg_membase (code, X86_EAX, X86_ESP, this_pos, 4);
970 x86_mov_reg_membase (code, X86_EDX, X86_EAX, target_offset, 4);
971 /* check if zero (static method call without this pointer) */
972 x86_alu_reg_imm (code, X86_CMP, X86_EDX, 0);
973 x86_branch32 (code, X86_CC_EQ, target, TRUE);
976 /* virtual delegate methods: we have to replace the this pointer
977 * withe the actual target */
978 x86_mov_membase_reg (code, X86_ESP, this_pos, X86_EDX, 4);
979 /* jump to method_ptr() */
980 x86_jump_membase (code, X86_EAX, method_offset);
982 /* static delegate methods: we have to remove the this pointer
983 * from the activation frame - I do this do creating a new
984 * stack frame an copy all arguments except the this pointer */
986 target = code - source;
987 g_assert ((arg_size & 3) == 0);
988 for (j = 0; j < (arg_size>>2); j++) {
989 x86_push_membase (code, X86_ESP, (arg_size + this_pos));
993 x86_push_membase (code, X86_ESP, (arg_size + 4));
995 x86_call_membase (code, X86_EAX, method_offset);
997 x86_alu_reg_imm (code, X86_ADD, X86_ESP, arg_size + 4);
999 x86_alu_reg_imm (code, X86_ADD, X86_ESP, arg_size);
1005 g_assert ((code - (guint8*)addr) < (64 + arg_size));
1008 if (mono_debug_handle)
1010 g_error ("Don't know how to exec runtime method %s.%s::%s",
1011 method->klass->name_space, method->klass->name, method->name);
1015 MonoMethodHeader *header = ((MonoMethodNormal *)method)->header;
1016 MonoJitInfo *ji = g_new0 (MonoJitInfo, 1);
1017 gulong code_size_ratio;
1019 cfg = mono_cfg_new (method, mp);
1021 mono_analyze_flow (cfg);
1025 mono_analyze_stack (cfg);
1029 cfg->rs = mono_regset_new (X86_NREG);
1030 mono_regset_reserve_reg (cfg->rs, X86_ESP);
1031 mono_regset_reserve_reg (cfg->rs, X86_EBP);
1033 cfg->code_size = MAX (header->code_size * 5, 256);
1034 cfg->start = cfg->code = g_malloc (cfg->code_size);
1035 mono_jit_stats.allocated_code_size += cfg->code_size;
1037 if (match_debug_method (method))
1038 x86_breakpoint (cfg->code);
1040 if (mono_jit_dump_forest) {
1042 printf ("FOREST %s.%s:%s\n", method->klass->name_space,
1043 method->klass->name, method->name);
1044 for (i = 0; i < cfg->block_count; i++) {
1045 printf ("BLOCK %d:\n", i);
1046 mono_print_forest (cfg->bblocks [i].forest);
1050 mono_label_cfg (cfg);
1054 arch_allocate_regs (cfg);
1056 /* align to 8 byte boundary */
1057 cfg->locals_size += 7;
1058 cfg->locals_size &= ~7;
1060 arch_emit_prologue (cfg);
1061 mono_emit_cfg (cfg);
1062 arch_emit_epilogue (cfg);
1066 code_size_ratio = cfg->code - cfg->start;
1067 if (code_size_ratio > mono_jit_stats.biggest_method_size) {
1068 mono_jit_stats.biggest_method_size = code_size_ratio;
1069 mono_jit_stats.biggest_method = method;
1071 code_size_ratio = (code_size_ratio * 100) / header->code_size;
1072 if (code_size_ratio > mono_jit_stats.max_code_size_ratio) {
1073 mono_jit_stats.max_code_size_ratio = code_size_ratio;
1074 mono_jit_stats.max_ratio_method = method;
1077 mono_compute_branches (cfg);
1079 if (mono_jit_dump_asm) {
1080 char *id = g_strdup_printf ("%s.%s_%s", method->klass->name_space,
1081 method->klass->name, method->name);
1082 mono_disassemble_code (cfg->start, cfg->code - cfg->start, id);
1085 if (mono_debug_handle)
1086 mono_debug_add_method (mono_debug_handle, cfg);
1088 ji->code_size = cfg->code - cfg->start;
1089 ji->used_regs = cfg->rs->used_mask;
1090 ji->method = method;
1091 ji->code_start = addr;
1092 mono_jit_info_table_add (mono_jit_info_table, ji);
1094 mono_jit_stats.native_code_size += ji->code_size;
1096 if (header->num_clauses) {
1097 int i, start_block, end_block;
1099 ji->num_clauses = header->num_clauses;
1100 ji->clauses = g_new0 (MonoJitExceptionInfo, header->num_clauses);
1102 for (i = 0; i < header->num_clauses; i++) {
1103 MonoExceptionClause *ec = &header->clauses [i];
1104 MonoJitExceptionInfo *ei = &ji->clauses [i];
1106 ei->flags = ec->flags;
1107 ei->token_or_filter = ec->token_or_filter;
1109 g_assert (cfg->bcinfo [ec->try_offset].is_block_start);
1110 start_block = cfg->bcinfo [ec->try_offset].block_id;
1111 end_block = cfg->bcinfo [ec->try_offset + ec->try_len].block_id;
1112 g_assert (cfg->bcinfo [ec->try_offset + ec->try_len].is_block_start);
1114 ei->try_start = cfg->start + cfg->bblocks [start_block].addr;
1115 ei->try_end = cfg->start + cfg->bblocks [end_block].addr;
1117 g_assert (cfg->bcinfo [ec->handler_offset].is_block_start);
1118 start_block = cfg->bcinfo [ec->handler_offset].block_id;
1119 ei->handler_start = cfg->start + cfg->bblocks [start_block].addr;
1121 //printf ("TEST %x %x %x\n", ei->try_start, ei->try_end, ei->handler_start);
1125 mono_regset_free (cfg->rs);
1127 mono_cfg_free (cfg);
1129 mono_mempool_destroy (mp);
1133 if (mono_jit_trace_calls || mono_jit_dump_asm || mono_jit_dump_forest) {
1134 printf ("END JIT compilation of %s.%s:%s %p %p\n", method->klass->name_space,
1135 method->klass->name, method->name, method, addr);
1138 g_hash_table_insert (jit_code_hash, method, addr);
1144 * arch_get_restore_context:
1146 * Returns a pointer to a method which restores a previously saved sigcontext.
1149 arch_get_restore_context ()
1151 static guint8 *start = NULL;
1157 /* restore_contect (struct sigcontext *ctx) */
1158 /* we do not restore X86_EAX, X86_EDX */
1160 start = code = malloc (1024);
1163 x86_mov_reg_membase (code, X86_EAX, X86_ESP, 4, 4);
1165 /* get return address, stored in EDX */
1166 x86_mov_reg_membase (code, X86_EDX, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, eip), 4);
1169 x86_mov_reg_membase (code, X86_EBX, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, ebx), 4);
1171 x86_mov_reg_membase (code, X86_EDI, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, edi), 4);
1173 x86_mov_reg_membase (code, X86_ESI, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, esi), 4);
1175 x86_mov_reg_membase (code, X86_ESP, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, esp), 4);
1177 x86_mov_reg_membase (code, X86_EBP, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, ebp), 4);
1178 /* restore ECX. the exception object is passed here to the catch handler */
1179 x86_mov_reg_membase (code, X86_ECX, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, ecx), 4);
1181 /* jump to the saved IP */
1182 x86_jump_reg (code, X86_EDX);
1188 * arch_get_call_finally:
1190 * Returns a pointer to a method which calls a finally handler.
1193 arch_get_call_finally ()
1195 static guint8 start [28];
1196 static int inited = 0;
1203 /* call_finally (struct sigcontext *ctx, unsigned long eip) */
1206 x86_push_reg (code, X86_EBP);
1207 x86_mov_reg_reg (code, X86_EBP, X86_ESP, 4);
1208 x86_push_reg (code, X86_EBX);
1209 x86_push_reg (code, X86_EDI);
1210 x86_push_reg (code, X86_ESI);
1213 x86_mov_reg_membase (code, X86_EAX, X86_EBP, 8, 4);
1215 x86_mov_reg_membase (code, X86_ECX, X86_EBP, 12, 4);
1217 x86_push_reg (code, X86_EBP);
1219 x86_mov_reg_membase (code, X86_EBP, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, ebp), 4);
1220 /* call the handler */
1221 x86_call_reg (code, X86_ECX);
1223 x86_pop_reg (code, X86_EBP);
1224 /* restore saved regs */
1225 x86_pop_reg (code, X86_ESI);
1226 x86_pop_reg (code, X86_EDI);
1227 x86_pop_reg (code, X86_EBX);
1231 g_assert ((code - start) < 28);
1236 * arch_handle_exception:
1237 * @ctx: saved processor state
1241 arch_handle_exception (struct sigcontext *ctx, gpointer obj)
1243 MonoDomain *domain = mono_domain_get ();
1245 gpointer ip = (gpointer)ctx->eip;
1246 static void (*restore_context) (struct sigcontext *);
1247 static void (*call_finally) (struct sigcontext *, unsigned long);
1249 g_assert (ctx != NULL);
1250 g_assert (obj != NULL);
1252 ji = mono_jit_info_table_find (mono_jit_info_table, ip);
1254 if (!restore_context)
1255 restore_context = arch_get_restore_context ();
1258 call_finally = arch_get_call_finally ();
1260 if (ji) { /* we are inside managed code */
1261 MonoMethod *m = ji->method;
1265 if (ji->num_clauses) {
1268 g_assert (ji->clauses);
1270 for (i = 0; i < ji->num_clauses; i++) {
1271 MonoJitExceptionInfo *ei = &ji->clauses [i];
1273 if (ei->try_start <= ip && ip <= (ei->try_end)) {
1275 if (ei->flags == 0 && mono_object_isinst (obj,
1276 mono_class_get (m->klass->image, ei->token_or_filter))) {
1278 ctx->eip = (unsigned long)ei->handler_start;
1279 ctx->ecx = (unsigned long)obj;
1280 restore_context (ctx);
1281 g_assert_not_reached ();
1286 /* no handler found - we need to call all finally handlers */
1287 for (i = 0; i < ji->num_clauses; i++) {
1288 MonoJitExceptionInfo *ei = &ji->clauses [i];
1290 if (ei->try_start <= ip && ip < (ei->try_end) &&
1291 (ei->flags & MONO_EXCEPTION_CLAUSE_FINALLY)) {
1292 call_finally (ctx, (unsigned long)ei->handler_start);
1297 if (mono_object_isinst (obj, mono_defaults.exception_class)) {
1298 char *strace = mono_string_to_utf8 (((MonoException*)obj)->stack_trace);
1301 if (!strcmp (strace, "TODO: implement stack traces")){
1303 strace = g_strdup ("");
1306 tmp = g_strdup_printf ("%sin %s.%s:%s ()\n", strace, m->klass->name_space,
1307 m->klass->name, m->name);
1311 ((MonoException*)obj)->stack_trace = mono_string_new (domain, tmp);
1315 /* continue unwinding */
1317 /* restore caller saved registers */
1318 if (ji->used_regs & X86_ESI_MASK) {
1319 ctx->esi = *((int *)ctx->ebp + offset);
1322 if (ji->used_regs & X86_EDI_MASK) {
1323 ctx->edi = *((int *)ctx->ebp + offset);
1326 if (ji->used_regs & X86_EBX_MASK) {
1327 ctx->ebx = *((int *)ctx->ebp + offset);
1330 ctx->esp = ctx->ebp;
1331 ctx->eip = *((int *)ctx->ebp + 1);
1332 ctx->ebp = *((int *)ctx->ebp);
1334 if (next_bp < (unsigned)mono_end_of_stack)
1335 arch_handle_exception (ctx, obj);
1337 mono_jit_abort (obj);
1340 gpointer *lmf_addr = TlsGetValue (lmf_thread_id);
1344 g_assert (lmf_addr);
1345 lmf = *((MonoLMF **)lmf_addr);
1348 mono_jit_abort (obj);
1352 *lmf_addr = lmf->previous_lmf;
1354 ctx->esi = lmf->esi;
1355 ctx->edi = lmf->edi;
1356 ctx->ebx = lmf->ebx;
1357 ctx->ebp = lmf->ebp;
1358 ctx->eip = lmf->eip;
1359 ctx->esp = (unsigned long)lmf;
1361 if (mono_object_isinst (obj, mono_defaults.exception_class)) {
1362 char *strace = mono_string_to_utf8 (((MonoException*)obj)->stack_trace);
1365 if (!strcmp (strace, "TODO: implement stack traces"))
1366 strace = g_strdup ("");
1368 tmp = g_strdup_printf ("%sin (unmanaged) %s.%s:%s ()\n", strace, m->klass->name_space,
1369 m->klass->name, m->name);
1373 ((MonoException*)obj)->stack_trace = mono_string_new (domain, tmp);
1377 if (ctx->eip < (unsigned)mono_end_of_stack)
1378 arch_handle_exception (ctx, obj);
1380 mono_jit_abort (obj);
1383 g_assert_not_reached ();
1387 throw_exception (unsigned long eax, unsigned long ecx, unsigned long edx, unsigned long ebx,
1388 unsigned long esi, unsigned long edi, unsigned long ebp, MonoObject *exc,
1389 unsigned long eip, unsigned long esp)
1391 struct sigcontext ctx;
1403 arch_handle_exception (&ctx, exc);
1405 g_assert_not_reached ();
1409 * arch_get_throw_exception:
1411 * Returns a function pointer which can be used to raise
1412 * exceptions. The returned function has the following
1413 * signature: void (*func) (MonoException *exc);
1414 * For example to raise an arithmetic exception you can use:
1416 * x86_push_imm (code, mono_get_exception_arithmetic ());
1417 * x86_call_code (code, arch_get_throw_exception ());
1421 arch_get_throw_exception (void)
1423 static guint8 start [24];
1424 static int inited = 0;
1433 x86_push_reg (code, X86_ESP);
1434 x86_push_membase (code, X86_ESP, 4); /* IP */
1435 x86_push_membase (code, X86_ESP, 12); /* exception */
1436 x86_push_reg (code, X86_EBP);
1437 x86_push_reg (code, X86_EDI);
1438 x86_push_reg (code, X86_ESI);
1439 x86_push_reg (code, X86_EBX);
1440 x86_push_reg (code, X86_EDX);
1441 x86_push_reg (code, X86_ECX);
1442 x86_push_reg (code, X86_EAX);
1443 x86_call_code (code, throw_exception);
1444 /* we should never reach this breakpoint */
1445 x86_breakpoint (code);
1447 g_assert ((code - start) < 24);
1452 * arch_get_throw_exception_by_name:
1454 * Returns a function pointer which can be used to raise
1455 * corlib exceptions. The returned function has the following
1456 * signature: void (*func) (char *exc_name);
1457 * For example to raise an arithmetic exception you can use:
1459 * x86_push_imm (code, "ArithmeticException");
1460 * x86_call_code (code, arch_get_throw_exception ());
1464 arch_get_throw_exception_by_name ()
1466 static guint8 start [32];
1467 static int inited = 0;
1476 /* fixme: we do not save EAX, EDX, ECD - unsure if we need that */
1478 x86_push_membase (code, X86_ESP, 4); /* exception name */
1479 x86_push_imm (code, "System");
1480 x86_push_imm (code, mono_defaults.exception_class->image);
1481 x86_call_code (code, mono_exception_from_name);
1482 x86_alu_reg_imm (code, X86_ADD, X86_ESP, 12);
1483 /* save the newly create object (overwrite exception name)*/
1484 x86_mov_membase_reg (code, X86_ESP, 4, X86_EAX, 4);
1485 x86_jump_code (code, arch_get_throw_exception ());
1487 g_assert ((code - start) < 32);
1493 * this returns a helper method to invoke a method with a user supplied
1494 * stack frame. The returned method has the following signature:
1495 * invoke_method_with_frame ((gpointer code, gpointer frame, int frame_size);
1498 get_invoke_method_with_frame ()
1500 static guint8 *start;
1506 start = code = malloc (64);
1509 x86_push_reg (code, X86_EBP);
1510 x86_mov_reg_reg (code, X86_EBP, X86_ESP, 4);
1511 x86_push_reg (code, X86_EBX);
1512 x86_push_reg (code, X86_EDI);
1513 x86_push_reg (code, X86_ESI);
1515 x86_mov_reg_membase (code, X86_EAX, X86_EBP, 16, 4);
1516 x86_alu_reg_reg (code, X86_SUB, X86_ESP, X86_EAX);
1518 x86_push_membase (code, X86_EBP, 16);
1519 x86_push_membase (code, X86_EBP, 12);
1520 x86_lea_membase (code, X86_EAX, X86_ESP, 2*4);
1521 x86_push_reg (code, X86_EAX);
1522 x86_call_code (code, memcpy);
1523 x86_alu_reg_imm (code, X86_ADD, X86_ESP, 12);
1525 x86_mov_reg_membase (code, X86_EAX, X86_EBP, 8, 4);
1526 x86_call_reg (code, X86_EAX);
1528 x86_mov_reg_membase (code, X86_ECX, X86_EBP, 16, 4);
1529 x86_alu_reg_reg (code, X86_ADD, X86_ESP, X86_ECX);
1532 x86_pop_reg (code, X86_ESI);
1533 x86_pop_reg (code, X86_EDI);
1534 x86_pop_reg (code, X86_EBX);
1538 g_assert ((code - start) < 64);
1544 * arch_runtime_invoke:
1545 * @method: the method to invoke
1546 * @obj: this pointer
1547 * @params: array of parameter values.
1549 * TODO: very ugly piece of code. we should replace that with a method-specific
1550 * trampoline (as suggested by Paolo).
1553 arch_runtime_invoke (MonoMethod *method, void *obj, void **params)
1555 static guint64 (*invoke_int64) (gpointer code, gpointer frame, int frame_size) = NULL;
1556 static double (*invoke_double) (gpointer code, gpointer frame, int frame_size) = NULL;
1558 MonoMethodSignature *sig = method->signature;
1559 int i, tmp, type, sp = 0;
1565 /* allocate ret object. */
1566 if (sig->ret->type == MONO_TYPE_VOID) {
1570 MonoClass *klass = mono_class_from_mono_type (sig->ret);
1571 if (klass->valuetype) {
1572 retval = mono_object_new (mono_domain_get (), klass);
1573 ret = ((char*)retval) + sizeof (MonoObject);
1579 if (ISSTRUCT (sig->ret))
1580 frame_size += sizeof (gpointer);
1583 frame_size += sizeof (gpointer);
1585 for (i = 0; i < sig->param_count; ++i) {
1587 frame_size += mono_type_stack_size (sig->params [i], &align);
1590 frame = alloca (frame_size);
1592 if (ISSTRUCT (sig->ret))
1599 for (i = 0; i < sig->param_count; ++i) {
1600 if (sig->params [i]->byref) {
1601 frame [sp++] = params [i];
1604 type = sig->params [i]->type;
1609 case MONO_TYPE_BOOLEAN:
1610 tmp = *(MonoBoolean*)params [i];
1611 frame [sp++] = (gpointer)tmp;
1615 case MONO_TYPE_CHAR:
1616 tmp = *(gint16*)params [i];
1617 frame [sp++] = (gpointer)tmp;
1619 #if SIZEOF_VOID_P == 4
1625 frame [sp++] = (gpointer)*(gint32*)params [i];
1627 #if SIZEOF_VOID_P == 8
1633 frame [sp++] = (gpointer)*(gint32*)params [i];
1634 frame [sp++] = (gpointer)*(((gint32*)params [i]) + 1);
1636 case MONO_TYPE_VALUETYPE:
1637 if (sig->params [i]->data.klass->enumtype) {
1638 type = sig->params [i]->data.klass->enum_basetype->type;
1641 g_warning ("generic valutype %s not handled in runtime invoke", sig->params [i]->data.klass->name);
1644 case MONO_TYPE_STRING:
1645 frame [sp++] = params [i];
1648 g_error ("type 0x%x not handled in invoke", sig->params [i]->type);
1653 code = method->addr;
1655 code = arch_compile_method (method);
1658 invoke_int64 = (gpointer)invoke_double = get_invoke_method_with_frame ();
1660 type = sig->ret->type;
1663 case MONO_TYPE_VOID:
1664 invoke_int64 (code, frame, frame_size);
1668 case MONO_TYPE_BOOLEAN:
1671 case MONO_TYPE_CHAR:
1672 #if SIZEOF_VOID_P == 4
1678 case MONO_TYPE_STRING:
1679 *((guint32 *)ret) = invoke_int64 (code, frame, frame_size);
1681 #if SIZEOF_VOID_P == 8
1687 *((guint64 *)ret) = invoke_int64 (code, frame, frame_size);
1690 *((float *)ret) = invoke_double (code, frame, frame_size);
1693 *((double *)ret) = invoke_double (code, frame, frame_size);
1695 case MONO_TYPE_VALUETYPE:
1696 if (sig->params [i]->data.klass->enumtype) {
1697 type = sig->params [i]->data.klass->enum_basetype->type;
1700 invoke_int64 (code, frame, frame_size);
1703 g_error ("type 0x%x not handled in invoke", sig->params [i]->type);