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/debug-helpers.h>
20 #include <mono/metadata/mono-endian.h>
21 #include <mono/arch/x86/x86-codegen.h>
28 enter_method (MonoMethod *method, gpointer ebp)
34 printf ("ENTER: %s.%s::%s\n(", method->klass->name_space,
35 method->klass->name, method->name);
38 if (((int)ebp & 3) != 0) {
39 g_error ("unaligned stack detected (%p)", ebp);
44 if (ISSTRUCT (method->signature->ret)) {
47 g_assert (!method->signature->ret->byref);
49 size = mono_type_stack_size (method->signature->ret, &align);
51 printf ("VALUERET:%p, ", *((gpointer *)ebp));
52 ebp += sizeof (gpointer);
55 if (method->signature->hasthis) {
56 if (method->klass->valuetype) {
57 printf ("value:%p, ", *((gpointer *)ebp));
59 o = *((MonoObject **)ebp);
63 class = o->vtable->klass;
65 if (class == mono_defaults.string_class) {
66 printf ("this:[STRING:%p:%s], ", o, mono_string_to_utf8 ((MonoString *)o));
68 printf ("this:%p[%s.%s], ", o, class->name_space, class->name);
71 ebp += sizeof (gpointer);
74 for (i = 0; i < method->signature->param_count; ++i) {
75 MonoType *type = method->signature->params [i];
77 size = mono_type_stack_size (type, &align);
80 printf ("[BYREF:%p], ", *((gpointer *)ebp));
81 } else switch (type->type) {
83 case MONO_TYPE_BOOLEAN:
93 printf ("%d, ", *((int *)(ebp)));
95 case MONO_TYPE_STRING: {
96 MonoString *s = *((MonoString **)ebp);
98 g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
99 printf ("[STRING:%p:%s], ", s, mono_string_to_utf8 (s));
101 printf ("[STRING:null], ");
104 case MONO_TYPE_CLASS:
105 case MONO_TYPE_OBJECT: {
106 o = *((MonoObject **)ebp);
108 class = o->vtable->klass;
110 if (class == mono_defaults.string_class) {
111 printf ("[STRING:%p:%s], ", o, mono_string_to_utf8 ((MonoString *)o));
112 } else if (class == mono_defaults.int32_class) {
113 printf ("[INT32:%p:%d], ", o, *(gint32 *)((gpointer)o + sizeof (MonoObject)));
115 printf ("[%s.%s:%p], ", class->name_space, class->name, o);
117 printf ("%p, ", *((gpointer *)(ebp)));
122 case MONO_TYPE_FNPTR:
123 case MONO_TYPE_ARRAY:
124 case MONO_TYPE_SZARRAY:
125 printf ("%p, ", *((gpointer *)(ebp)));
128 printf ("%lld, ", *((gint64 *)(ebp)));
131 printf ("%f, ", *((float *)(ebp)));
134 printf ("%f, ", *((double *)(ebp)));
136 case MONO_TYPE_VALUETYPE:
138 for (j = 0; j < size; j++)
139 printf ("%02x,", *((guint8*)ebp +j));
146 g_assert (align == 4);
148 ebp = (gpointer)((unsigned)ebp & ~(3));
155 leave_method (MonoMethod *method, int edx, int eax, double test)
159 printf ("LEAVE: %s.%s::%s ", method->klass->name_space,
160 method->klass->name, method->name);
162 switch (method->signature->ret->type) {
165 case MONO_TYPE_BOOLEAN:
167 printf ("TRUE:%d", eax);
181 printf ("EAX=%d", eax);
183 case MONO_TYPE_STRING: {
184 MonoString *s = (MonoString *)eax;
187 g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
188 printf ("[STRING:%p:%s]", s, mono_string_to_utf8 (s));
190 printf ("[STRING:null], ");
193 case MONO_TYPE_OBJECT: {
194 MonoObject *o = (MonoObject *)eax;
197 if (o->vtable->klass == mono_defaults.boolean_class) {
198 printf ("[BOOLEAN:%p:%d]", o, *((guint8 *)o + sizeof (MonoObject)));
199 } else if (o->vtable->klass == mono_defaults.int32_class) {
200 printf ("[INT32:%p:%d]", o, *((gint32 *)((gpointer)o + sizeof (MonoObject))));
202 printf ("[%s.%s:%p]", o->vtable->klass->name_space, o->vtable->klass->name, o);
204 printf ("[OBJECT:%p]", o);
208 case MONO_TYPE_CLASS:
210 case MONO_TYPE_FNPTR:
211 case MONO_TYPE_ARRAY:
212 case MONO_TYPE_SZARRAY:
213 printf ("EAX=%p", (gpointer)eax);
216 *((gint32 *)&l) = eax;
217 *((gint32 *)&l + 1) = edx;
218 printf ("EAX/EDX=%lld", l);
221 printf ("FP=%f\n", test);
224 printf ("(unknown return type)");
231 * arch_emit_prologue:
232 * @cfg: pointer to status information
234 * Emits the function prolog.
237 arch_emit_prologue (MonoFlowGraph *cfg)
239 x86_push_reg (cfg->code, X86_EBP);
240 x86_mov_reg_reg (cfg->code, X86_EBP, X86_ESP, 4);
242 if (cfg->locals_size)
243 x86_alu_reg_imm (cfg->code, X86_SUB, X86_ESP, cfg->locals_size);
245 if (mono_regset_reg_used (cfg->rs, X86_EBX))
246 x86_push_reg (cfg->code, X86_EBX);
248 if (mono_regset_reg_used (cfg->rs, X86_EDI))
249 x86_push_reg (cfg->code, X86_EDI);
251 if (mono_regset_reg_used (cfg->rs, X86_ESI))
252 x86_push_reg (cfg->code, X86_ESI);
254 if (mono_jit_trace_calls) {
255 x86_push_reg (cfg->code, X86_EBP);
256 x86_push_imm (cfg->code, cfg->method);
257 x86_mov_reg_imm (cfg->code, X86_EAX, enter_method);
258 x86_call_reg (cfg->code, X86_EAX);
259 x86_alu_reg_imm (cfg->code, X86_ADD, X86_ESP, 8);
264 * arch_emit_epilogue:
265 * @cfg: pointer to status information
267 * Emits the function epilog.
270 arch_emit_epilogue (MonoFlowGraph *cfg)
272 if (mono_jit_trace_calls) {
273 x86_fld_reg (cfg->code, 0);
274 x86_alu_reg_imm (cfg->code, X86_SUB, X86_ESP, 8);
275 x86_fst_membase (cfg->code, X86_ESP, 0, TRUE, TRUE);
276 x86_push_reg (cfg->code, X86_EAX);
277 x86_push_reg (cfg->code, X86_EDX);
278 x86_push_imm (cfg->code, cfg->method);
279 x86_mov_reg_imm (cfg->code, X86_EAX, leave_method);
280 x86_call_reg (cfg->code, X86_EAX);
281 x86_alu_reg_imm (cfg->code, X86_ADD, X86_ESP, 4);
282 x86_pop_reg (cfg->code, X86_EDX);
283 x86_pop_reg (cfg->code, X86_EAX);
284 x86_alu_reg_imm (cfg->code, X86_ADD, X86_ESP, 8);
287 if (mono_regset_reg_used (cfg->rs, X86_ESI))
288 x86_pop_reg (cfg->code, X86_ESI);
290 if (mono_regset_reg_used (cfg->rs, X86_EDI))
291 x86_pop_reg (cfg->code, X86_EDI);
293 if (mono_regset_reg_used (cfg->rs, X86_EBX))
294 x86_pop_reg (cfg->code, X86_EBX);
296 x86_leave (cfg->code);
301 * get_unbox_trampoline:
303 * @addr: pointer to native code for @m
305 * when value type methods are called through the vtable we need to unbox the
306 * this argument. This method returns a pointer to a trampoline which does
307 * unboxing before calling the method
310 get_unbox_trampoline (MonoMethod *m, gpointer addr)
312 guint8 *code, *start;
315 if (!m->signature->ret->byref && m->signature->ret->type == MONO_TYPE_VALUETYPE)
318 start = code = g_malloc (16);
320 x86_alu_membase_imm (code, X86_ADD, X86_ESP, this_pos, sizeof (MonoObject));
321 x86_jump_code (code, addr);
322 g_assert ((code - start) < 16);
328 * x86_magic_trampoline:
329 * @eax: saved x86 register
330 * @ecx: saved x86 register
331 * @edx: saved x86 register
332 * @esi: saved x86 register
333 * @edi: saved x86 register
334 * @ebx: saved x86 register
335 * @code: pointer into caller code
336 * @method: the method to translate
338 * This method is called by the trampoline functions for virtual
339 * methods. It inspects the caller code to find the address of the
340 * vtable slot, then calls the JIT compiler and writes the address
341 * of the compiled method back to the vtable. All virtual methods
342 * are called with: x86_call_membase (inst, basereg, disp). We always
343 * use 32 bit displacement to ensure that the length of the call
344 * instruction is 6 bytes. We need to get the value of the basereg
345 * and the constant displacement.
348 x86_magic_trampoline (int eax, int ecx, int edx, int esi, int edi,
349 int ebx, const guint8 *code, MonoMethod *m)
356 EnterCriticalSection (metadata_section);
357 addr = arch_compile_method (m);
358 LeaveCriticalSection (metadata_section);
362 /* go to the start of the call instruction
364 * address_byte = (m << 6) | (o << 3) | reg
365 * call opcode: 0xff address_byte displacement
370 if ((code [1] != 0xe8) && (code [3] == 0xff) && ((code [4] & 0x18) == 0x10) && ((code [4] >> 6) == 1)) {
371 reg = code [4] & 0x07;
372 disp = (signed char)code [5];
374 if ((code [0] == 0xff) && ((code [1] & 0x18) == 0x10) && ((code [1] >> 6) == 2)) {
375 reg = code [1] & 0x07;
376 disp = *((gint32*)(code + 2));
377 } else if ((code [1] == 0xe8)) {
378 *((guint32*)(code + 2)) = (guint)addr - ((guint)code + 1) - 5;
381 printf ("%x %x %x %x %x %x \n", code [0], code [1], code [2], code [3],
383 g_assert_not_reached ();
407 g_assert_not_reached ();
412 if (m->klass->valuetype) {
413 return *((gpointer *)o) = get_unbox_trampoline (m, addr);
415 return *((gpointer *)o) = addr;
420 * arch_create_jit_trampoline:
421 * @method: pointer to the method info
423 * Creates a trampoline function for virtual methods. If the created
424 * code is called it first starts JIT compilation of method,
425 * and then calls the newly created method. I also replaces the
426 * corresponding vtable entry (see x86_magic_trampoline).
428 * Returns: a pointer to the newly created code
431 arch_create_jit_trampoline (MonoMethod *method)
433 MonoDomain *domain = mono_domain_get ();
435 static guint8 *vc = NULL;
436 GHashTable *jit_code_hash;
438 /* previously created trampoline code */
442 /* icalls use method->addr */
443 if ((method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) ||
444 (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL)) {
445 method->info = arch_create_native_wrapper (method);
449 /* check if we already have JITed code */
450 if (mono_jit_share_code)
451 jit_code_hash = mono_root_domain->jit_code_hash;
453 jit_code_hash = domain->jit_code_hash;
455 if ((code = g_hash_table_lookup (jit_code_hash, method))) {
456 mono_jit_stats.methods_lookups++;
461 vc = buf = g_malloc (256);
463 /* save caller save regs because we need to do a call */
464 x86_push_reg (buf, X86_EDX);
465 x86_push_reg (buf, X86_EAX);
466 x86_push_reg (buf, X86_ECX);
469 x86_push_reg (buf, X86_EBX);
470 x86_push_reg (buf, X86_EDI);
471 x86_push_reg (buf, X86_ESI);
472 x86_push_reg (buf, X86_EBP);
474 /* save the IP (caller ip) */
475 x86_push_membase (buf, X86_ESP, 32);
477 /* save method info */
478 x86_push_membase (buf, X86_ESP, 32);
479 /* get the address of lmf for the current thread */
480 x86_call_code (buf, arch_get_lmf_addr);
482 x86_push_reg (buf, X86_EAX);
483 /* push *lfm (previous_lmf) */
484 x86_push_membase (buf, X86_EAX, 0);
486 x86_mov_membase_reg (buf, X86_EAX, 0, X86_ESP, 4);
489 /* push the method info */
490 x86_push_membase (buf, X86_ESP, 44);
491 /* push the return address onto the stack */
492 x86_push_membase (buf, X86_ESP, 52);
494 /* save all register values */
495 x86_push_reg (buf, X86_EBX);
496 x86_push_reg (buf, X86_EDI);
497 x86_push_reg (buf, X86_ESI);
498 x86_push_membase (buf, X86_ESP, 64); /* EDX */
499 x86_push_membase (buf, X86_ESP, 64); /* ECX */
500 x86_push_membase (buf, X86_ESP, 64); /* EAX */
502 x86_call_code (buf, x86_magic_trampoline);
503 x86_alu_reg_imm (buf, X86_ADD, X86_ESP, 8*4);
505 /* restore LMF start */
506 /* ebx = previous_lmf */
507 x86_pop_reg (buf, X86_EBX);
509 x86_pop_reg (buf, X86_EDI);
510 /* *(lmf) = previous_lmf */
511 x86_mov_membase_reg (buf, X86_EDI, 0, X86_EBX, 4);
512 /* discard method info */
513 x86_pop_reg (buf, X86_ESI);
514 /* discard save IP */
515 x86_pop_reg (buf, X86_ESI);
516 /* restore caller saved regs */
517 x86_pop_reg (buf, X86_EBP);
518 x86_pop_reg (buf, X86_ESI);
519 x86_pop_reg (buf, X86_EDI);
520 x86_pop_reg (buf, X86_EBX);
521 /* restore LMF end */
523 x86_alu_reg_imm (buf, X86_ADD, X86_ESP, 16);
525 /* call the compiled method */
526 x86_jump_reg (buf, X86_EAX);
528 g_assert ((buf - vc) <= 256);
531 code = buf = g_malloc (16);
532 x86_push_imm (buf, method);
533 x86_jump_code (buf, vc);
534 g_assert ((buf - code) <= 16);
536 /* store trampoline address */
539 mono_jit_stats.method_trampolines++;
545 mono_label_cfg (MonoFlowGraph *cfg)
549 for (i = 0; i < cfg->block_count; i++) {
550 GPtrArray *forest = cfg->bblocks [i].forest;
553 if (!cfg->bblocks [i].reached) /* unreachable code */
558 for (j = 0; j < top; j++) {
559 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, j);
562 mbstate = mono_burg_label (t1, cfg);
565 if (mono_debug_handle)
567 g_warning ("tree does not match");
568 mono_print_ctree (t1); printf ("\n\n");
570 mono_print_forest (forest);
571 g_assert_not_reached ();
578 tree_preallocate_regs (MBTree *tree, int goal, MonoRegSet *rs)
581 case MB_TERM_CALL_I4:
582 case MB_TERM_CALL_I8:
583 case MB_TERM_CALL_R8:
584 // case MB_TERM_CALL_VOID :
585 tree->reg1 = mono_regset_alloc_reg (rs, X86_EAX, tree->exclude_mask);
586 tree->reg2 = mono_regset_alloc_reg (rs, X86_EDX, tree->exclude_mask);
587 tree->reg3 = mono_regset_alloc_reg (rs, X86_ECX, tree->exclude_mask);
594 case MB_NTERM_lreg: {
599 tree->exclude_mask |= (1 << X86_ECX);
600 tree->left->exclude_mask |= (1 << X86_ECX);
603 case MB_TERM_MUL_OVF:
604 case MB_TERM_MUL_OVF_UN:
609 tree->reg1 = mono_regset_alloc_reg (rs, X86_EAX, tree->exclude_mask);
610 tree->reg2 = mono_regset_alloc_reg (rs, X86_EDX, tree->exclude_mask);
611 if (goal == MB_NTERM_reg) {
612 tree->left->exclude_mask |= (1 << X86_EDX);
613 tree->right->exclude_mask |= (1 << X86_EDX) | (1 << X86_EAX);
627 tree_allocate_regs (MBTree *tree, int goal, MonoRegSet *rs)
630 int ern = mono_burg_rule (tree->state, goal);
631 const guint16 *nts = mono_burg_nts [ern];
634 mono_burg_kids (tree, ern, kids);
636 //printf ("RALLOC START %d %p %d\n", tree->op, rs->free_mask, goal);
638 if (nts [0] && kids [0] == tree) {
640 tree_allocate_regs (kids [0], nts [0], rs);
644 for (i = 0; nts [i]; i++)
645 tree_preallocate_regs (kids [i], nts [i], rs);
647 for (i = 0; nts [i]; i++)
648 tree_allocate_regs (kids [i], nts [i], rs);
650 for (i = 0; nts [i]; i++) {
651 mono_regset_free_reg (rs, kids [i]->reg1);
652 mono_regset_free_reg (rs, kids [i]->reg2);
653 mono_regset_free_reg (rs, kids [i]->reg3);
658 if (tree->reg1 < 0) {
659 tree->reg1 = mono_regset_alloc_reg (rs, -1, tree->exclude_mask);
660 g_assert (tree->reg1 != -1);
665 if (tree->reg1 < 0) {
666 tree->reg1 = mono_regset_alloc_reg (rs, -1, tree->exclude_mask);
667 g_assert (tree->reg1 != -1);
669 if (tree->reg2 < 0) {
670 tree->reg2 = mono_regset_alloc_reg (rs, -1, tree->exclude_mask);
671 g_assert (tree->reg2 != -1);
676 /* fixme: allocate floating point registers */
680 if (tree->op == MB_TERM_ADD) {
681 tree->reg1 = mono_regset_alloc_reg (rs, tree->left->reg1, tree->exclude_mask);
682 tree->reg2 = mono_regset_alloc_reg (rs, tree->right->reg1, tree->exclude_mask);
687 if (tree->op == MB_TERM_ADD) {
688 tree->reg1 = mono_regset_alloc_reg (rs, tree->left->reg1, tree->exclude_mask);
693 if (tree->op == MB_TERM_SHL ||
694 tree->op == MB_TERM_MUL) {
695 tree->reg1 = mono_regset_alloc_reg (rs, tree->left->reg1, tree->exclude_mask);
703 //printf ("RALLOC END %d %p\n", tree->op, rs->free_mask);
704 tree->emit = mono_burg_func [ern];
708 arch_allocate_regs (MonoFlowGraph *cfg)
712 for (i = 0; i < cfg->block_count; i++) {
713 GPtrArray *forest = cfg->bblocks [i].forest;
716 if (!cfg->bblocks [i].reached) /* unreachable code */
721 for (j = 0; j < top; j++) {
722 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, j);
723 //printf ("AREGSTART %d:%d %p\n", i, j, cfg->rs->free_mask);
724 tree_allocate_regs (t1, 1, cfg->rs);
725 //printf ("AREGENDT %d:%d %p\n", i, j, cfg->rs->free_mask);
726 g_assert (cfg->rs->free_mask == 0xffffffff);
732 tree_emit (int goal, MonoFlowGraph *cfg, MBTree *tree)
735 int i, ern = mono_burg_rule (tree->state, goal);
736 const guint16 *nts = mono_burg_nts [ern];
740 mono_burg_kids (tree, ern, kids);
742 for (i = 0; nts [i]; i++)
743 tree_emit (nts [i], cfg, kids [i]);
745 tree->addr = offset = cfg->code - cfg->start;
747 // we assume an instruction uses a maximum of 128 bytes
748 if ((cfg->code_size - offset) <= 128) {
749 int add = MIN (cfg->code_size, 128);
750 cfg->code_size += add;
751 mono_jit_stats.code_reallocs++;
752 cfg->start = g_realloc (cfg->start, cfg->code_size);
753 g_assert (cfg->start);
754 cfg->code = cfg->start + offset;
757 if ((emit = mono_burg_func [ern]))
760 g_assert ((cfg->code - cfg->start) < cfg->code_size);
764 mono_emit_cfg (MonoFlowGraph *cfg)
768 for (i = 0; i < cfg->block_count; i++) {
769 MonoBBlock *bb = &cfg->bblocks [i];
770 GPtrArray *forest = bb->forest;
773 if (!bb->reached) /* unreachable code */
778 bb->addr = cfg->code - cfg->start;
780 for (j = 0; j < top; j++) {
781 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, j);
783 tree_emit (1, cfg, t1);
787 cfg->epilog = cfg->code - cfg->start;
791 mono_compute_branches (MonoFlowGraph *cfg)
799 for (j = 0; j < cfg->block_count; j++) {
800 MonoBBlock *bb = &cfg->bblocks [j];
801 GPtrArray *forest = bb->forest;
804 if (!bb->reached) /* unreachable code */
809 for (i = 0; i < top; i++) {
810 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, i);
812 if (t1->op == MB_TERM_SWITCH) {
813 MonoBBlock **jt = (MonoBBlock **)t1->data.p;
814 guint32 *rt = (guint32 *)t1->data.p;
816 int m = *((guint32 *)t1->data.p) + 1;
819 for (j = 1; j <= m; j++)
820 rt [j] = (int)(jt [j]->addr + cfg->start);
822 /* emit the switch instruction again to update addresses */
823 cfg->code = cfg->start + t1->addr;
824 ((MBEmitFunc)t1->emit) (t1, cfg);
831 for (ji = cfg->jump_info; ji; ji = ji->next) {
832 gpointer *ip = GUINT_TO_POINTER (GPOINTER_TO_UINT (ji->ip) + cfg->start);
836 case MONO_JUMP_INFO_BB:
837 target = ji->data.bb->addr + cfg->start;
838 *ip = target - GPOINTER_TO_UINT(ip) - 4;
840 case MONO_JUMP_INFO_ABS:
841 target = ji->data.target;
842 *ip = target - GPOINTER_TO_UINT(ip) - 4;
844 case MONO_JUMP_INFO_EPILOG:
845 target = cfg->epilog + cfg->start;
846 *ip = target - GPOINTER_TO_UINT(ip) - 4;
848 case MONO_JUMP_INFO_IP:
852 g_assert_not_reached ();
858 mono_add_jump_info (MonoFlowGraph *cfg, gpointer ip, MonoJumpInfoType type, gpointer target)
860 MonoJumpInfo *ji = mono_mempool_alloc (cfg->mp, sizeof (MonoJumpInfo));
863 ji->ip = GUINT_TO_POINTER (GPOINTER_TO_UINT (ip) - GPOINTER_TO_UINT (cfg->start));
864 ji->data.target = target;
865 ji->next = cfg->jump_info;
871 match_debug_method (MonoMethod* method)
873 GList *tmp = mono_debug_methods;
875 for (; tmp; tmp = tmp->next) {
876 if (mono_method_desc_full_match (tmp->data, method))
883 mono_delegate_ctor (MonoDelegate *this, MonoObject *target,
886 MonoDomain *domain = mono_domain_get ();
893 class = this->object.vtable->klass;
895 if ((ji = mono_jit_info_table_find (mono_jit_info_table, addr))) {
896 this->method_info = mono_method_get_object (domain, ji->method);
899 this->target = target;
900 this->method_ptr = addr;
905 * arch_compile_method:
906 * @method: pointer to the method info
908 * JIT compilation of a single method.
910 * Returns: a pointer to the newly created code.
913 arch_compile_method (MonoMethod *method)
915 MonoDomain *domain = mono_domain_get ();
919 GHashTable *jit_code_hash;
921 g_assert (!(method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL));
923 if (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) {
925 method->info = arch_create_native_wrapper (method);
929 if (mono_jit_share_code)
930 jit_code_hash = mono_root_domain->jit_code_hash;
932 jit_code_hash = domain->jit_code_hash;
934 if ((addr = g_hash_table_lookup (jit_code_hash, method))) {
935 mono_jit_stats.methods_lookups++;
939 mono_jit_stats.methods_compiled++;
941 mp = mono_mempool_new ();
943 if (mono_jit_trace_calls || mono_jit_dump_asm || mono_jit_dump_forest) {
944 printf ("Start JIT compilation of %s.%s:%s\n", method->klass->name_space,
945 method->klass->name, method->name);
948 if (method->iflags & METHOD_IMPL_ATTRIBUTE_RUNTIME) {
949 const char *name = method->name;
951 gboolean delegate = FALSE;
953 if (method->klass->parent == mono_defaults.multicastdelegate_class)
956 if (delegate && *name == '.' && (strcmp (name, ".ctor") == 0)) {
957 addr = (gpointer)mono_delegate_ctor;
958 } else if (delegate && *name == 'I' && (strcmp (name, "Invoke") == 0)) {
960 * Invoke( args .. ) {
963 * return this.<m_target>( args );
966 MonoMethodSignature *csig = method->signature;
967 guint8 *br[2], *pos[2];
968 int i, arg_size, this_pos = 4;
970 if (csig->ret->type == MONO_TYPE_VALUETYPE) {
971 g_assert (!csig->ret->byref);
976 if (csig->param_count) {
979 for (i = 0; i < csig->param_count; ++i) {
980 arg_size += mono_type_stack_size (csig->params [i], &align);
981 g_assert (align == 4);
985 addr = g_malloc (64 + arg_size);
988 /* load the this pointer */
989 x86_mov_reg_membase (code, X86_EAX, X86_ESP, this_pos, 4);
992 x86_mov_reg_membase (code, X86_EDX, X86_EAX, G_STRUCT_OFFSET (MonoMulticastDelegate, prev), 4);
995 x86_alu_reg_imm (code, X86_CMP, X86_EDX, 0);
996 br[0] = code; x86_branch32 (code, X86_CC_EQ, 0, TRUE );
999 x86_push_reg( code, X86_EAX );
1001 for ( i = 0; i < (arg_size>>2); i++ )
1002 x86_push_membase( code, X86_ESP, (arg_size + this_pos + 4) );
1004 x86_push_reg( code, X86_EDX );
1006 x86_push_membase (code, X86_ESP, (arg_size + 8));
1008 br[1] = code; x86_call_imm( code, 0 );
1009 pos[1] = code; x86_call_imm( br[1], addr - pos[1] );
1012 x86_alu_reg_imm (code, X86_ADD, X86_ESP, arg_size + 8);
1014 x86_alu_reg_imm (code, X86_ADD, X86_ESP, arg_size + 4);
1015 x86_pop_reg( code, X86_EAX );
1018 x86_branch32( br[0], X86_CC_EQ, code - pos[0], TRUE );
1021 x86_mov_reg_membase (code, X86_EDX, X86_EAX, G_STRUCT_OFFSET (MonoDelegate, target), 4);
1022 /* mtarget == 0 ? */
1023 x86_alu_reg_imm (code, X86_CMP, X86_EDX, 0);
1024 br[0] = code; x86_branch32 (code, X86_CC_EQ, 0, TRUE);
1028 * virtual delegate methods: we have to
1029 * replace the this pointer with the actual
1032 x86_mov_membase_reg (code, X86_ESP, this_pos, X86_EDX, 4);
1033 /* jump to method_ptr() */
1034 x86_jump_membase (code, X86_EAX, G_STRUCT_OFFSET (MonoDelegate, method_ptr));
1037 x86_branch32( br[0], X86_CC_EQ, code - pos[0], TRUE);
1039 * static delegate methods: we have to remove
1040 * the this pointer from the activation frame
1041 * - I do this creating a new stack frame anx
1042 * copy all arguments except the this pointer
1044 g_assert ((arg_size & 3) == 0);
1045 for (i = 0; i < (arg_size>>2); i++) {
1046 x86_push_membase (code, X86_ESP, (arg_size + this_pos));
1050 x86_push_membase (code, X86_ESP, (arg_size + 4));
1052 x86_call_membase (code, X86_EAX, G_STRUCT_OFFSET (MonoDelegate, method_ptr));
1055 x86_alu_reg_imm (code, X86_ADD, X86_ESP, arg_size + 4);
1057 x86_alu_reg_imm (code, X86_ADD, X86_ESP, arg_size);
1062 g_assert ((code - (guint8*)addr) < (64 + arg_size));
1064 if (mono_jit_dump_asm) {
1065 char *id = g_strdup_printf ("%s.%s_%s", method->klass->name_space,
1066 method->klass->name, method->name);
1067 mono_disassemble_code( addr, code - (guint8*)addr, id );
1071 if (mono_debug_handle)
1074 g_error ("Don't know how to exec runtime method %s.%s::%s",
1075 method->klass->name_space, method->klass->name, method->name);
1079 MonoMethodHeader *header = ((MonoMethodNormal *)method)->header;
1082 gulong code_size_ratio;
1084 ji = g_new0 (MonoJitInfo, 1);
1086 cfg = mono_cfg_new (method, mp);
1088 mono_analyze_flow (cfg);
1092 mono_analyze_stack (cfg);
1096 cfg->rs = mono_regset_new (X86_NREG);
1097 mono_regset_reserve_reg (cfg->rs, X86_ESP);
1098 mono_regset_reserve_reg (cfg->rs, X86_EBP);
1100 cfg->code_size = MAX (header->code_size * 5, 256);
1101 cfg->start = cfg->code = g_malloc (cfg->code_size);
1103 if (match_debug_method (method))
1104 x86_breakpoint (cfg->code);
1105 else if (mono_debug_handle)
1106 x86_nop (cfg->code);
1108 if (mono_jit_dump_forest) {
1110 printf ("FOREST %s.%s:%s\n", method->klass->name_space,
1111 method->klass->name, method->name);
1112 for (i = 0; i < cfg->block_count; i++) {
1113 printf ("BLOCK %d:\n", i);
1114 mono_print_forest (cfg->bblocks [i].forest);
1118 mono_label_cfg (cfg);
1122 arch_allocate_regs (cfg);
1124 /* align to 8 byte boundary */
1125 cfg->locals_size += 7;
1126 cfg->locals_size &= ~7;
1128 arch_emit_prologue (cfg);
1129 mono_emit_cfg (cfg);
1130 arch_emit_epilogue (cfg);
1134 mono_jit_stats.allocated_code_size += cfg->code_size;
1136 code_size_ratio = cfg->code - cfg->start;
1137 if (code_size_ratio > mono_jit_stats.biggest_method_size) {
1138 mono_jit_stats.biggest_method_size = code_size_ratio;
1139 mono_jit_stats.biggest_method = method;
1141 code_size_ratio = (code_size_ratio * 100) / header->code_size;
1142 if (code_size_ratio > mono_jit_stats.max_code_size_ratio) {
1143 mono_jit_stats.max_code_size_ratio = code_size_ratio;
1144 mono_jit_stats.max_ratio_method = method;
1147 mono_compute_branches (cfg);
1149 if (mono_jit_dump_asm) {
1150 char *id = g_strdup_printf ("%s.%s_%s", method->klass->name_space,
1151 method->klass->name, method->name);
1152 mono_disassemble_code (cfg->start, cfg->code - cfg->start, id);
1155 if (mono_debug_handle)
1156 mono_debug_add_method (mono_debug_handle, cfg);
1158 ji->code_size = cfg->code - cfg->start;
1159 ji->used_regs = cfg->rs->used_mask;
1160 ji->method = method;
1161 ji->code_start = addr;
1162 mono_jit_info_table_add (mono_jit_info_table, ji);
1164 mono_jit_stats.native_code_size += ji->code_size;
1166 if (header->num_clauses) {
1167 int i, start_block, end_block;
1169 ji->num_clauses = header->num_clauses;
1170 ji->clauses = g_new0 (MonoJitExceptionInfo, header->num_clauses);
1172 for (i = 0; i < header->num_clauses; i++) {
1173 MonoExceptionClause *ec = &header->clauses [i];
1174 MonoJitExceptionInfo *ei = &ji->clauses [i];
1176 ei->flags = ec->flags;
1177 ei->token_or_filter = ec->token_or_filter;
1179 g_assert (cfg->bcinfo [ec->try_offset].is_block_start);
1180 start_block = cfg->bcinfo [ec->try_offset].block_id;
1181 end_block = cfg->bcinfo [ec->try_offset + ec->try_len].block_id;
1182 g_assert (cfg->bcinfo [ec->try_offset + ec->try_len].is_block_start);
1184 ei->try_start = cfg->start + cfg->bblocks [start_block].addr;
1185 ei->try_end = cfg->start + cfg->bblocks [end_block].addr;
1187 g_assert (cfg->bcinfo [ec->handler_offset].is_block_start);
1188 start_block = cfg->bcinfo [ec->handler_offset].block_id;
1189 ei->handler_start = cfg->start + cfg->bblocks [start_block].addr;
1191 //printf ("TEST %x %x %x\n", ei->try_start, ei->try_end, ei->handler_start);
1195 mono_regset_free (cfg->rs);
1197 mono_cfg_free (cfg);
1199 mono_mempool_destroy (mp);
1203 if (mono_jit_trace_calls || mono_jit_dump_asm || mono_jit_dump_forest) {
1204 printf ("END JIT compilation of %s.%s:%s %p %p\n", method->klass->name_space,
1205 method->klass->name, method->name, method, addr);
1208 g_hash_table_insert (jit_code_hash, method, addr);
1214 * arch_get_restore_context:
1216 * Returns a pointer to a method which restores a previously saved sigcontext.
1219 arch_get_restore_context ()
1221 static guint8 *start = NULL;
1227 /* restore_contect (struct sigcontext *ctx) */
1228 /* we do not restore X86_EAX, X86_EDX */
1230 start = code = g_malloc (1024);
1233 x86_mov_reg_membase (code, X86_EAX, X86_ESP, 4, 4);
1235 /* get return address, stored in EDX */
1236 x86_mov_reg_membase (code, X86_EDX, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, eip), 4);
1238 x86_mov_reg_membase (code, X86_EBX, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, ebx), 4);
1240 x86_mov_reg_membase (code, X86_EDI, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, edi), 4);
1242 x86_mov_reg_membase (code, X86_ESI, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, esi), 4);
1244 x86_mov_reg_membase (code, X86_ESP, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, esp), 4);
1246 x86_mov_reg_membase (code, X86_EBP, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, ebp), 4);
1247 /* restore ECX. the exception object is passed here to the catch handler */
1248 x86_mov_reg_membase (code, X86_ECX, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, ecx), 4);
1250 /* jump to the saved IP */
1251 x86_jump_reg (code, X86_EDX);
1257 * arch_get_call_finally:
1259 * Returns a pointer to a method which calls a finally handler.
1262 arch_get_call_finally ()
1264 static guint8 start [28];
1265 static int inited = 0;
1272 /* call_finally (struct sigcontext *ctx, unsigned long eip) */
1275 x86_push_reg (code, X86_EBP);
1276 x86_mov_reg_reg (code, X86_EBP, X86_ESP, 4);
1277 x86_push_reg (code, X86_EBX);
1278 x86_push_reg (code, X86_EDI);
1279 x86_push_reg (code, X86_ESI);
1282 x86_mov_reg_membase (code, X86_EAX, X86_EBP, 8, 4);
1284 x86_mov_reg_membase (code, X86_ECX, X86_EBP, 12, 4);
1286 x86_push_reg (code, X86_EBP);
1288 x86_mov_reg_membase (code, X86_EBP, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, ebp), 4);
1289 /* call the handler */
1290 x86_call_reg (code, X86_ECX);
1292 x86_pop_reg (code, X86_EBP);
1293 /* restore saved regs */
1294 x86_pop_reg (code, X86_ESI);
1295 x86_pop_reg (code, X86_EDI);
1296 x86_pop_reg (code, X86_EBX);
1300 g_assert ((code - start) < 28);
1305 * arch_handle_exception:
1306 * @ctx: saved processor state
1310 arch_handle_exception (struct sigcontext *ctx, gpointer obj)
1312 MonoDomain *domain = mono_domain_get ();
1314 gpointer ip = (gpointer)ctx->eip;
1315 static void (*restore_context) (struct sigcontext *);
1316 static void (*call_finally) (struct sigcontext *, unsigned long);
1318 g_assert (ctx != NULL);
1319 g_assert (obj != NULL);
1321 ji = mono_jit_info_table_find (mono_jit_info_table, ip);
1323 if (!restore_context)
1324 restore_context = arch_get_restore_context ();
1327 call_finally = arch_get_call_finally ();
1329 if (ji) { /* we are inside managed code */
1330 MonoMethod *m = ji->method;
1333 if (ji->num_clauses) {
1336 g_assert (ji->clauses);
1338 for (i = 0; i < ji->num_clauses; i++) {
1339 MonoJitExceptionInfo *ei = &ji->clauses [i];
1341 if (ei->try_start <= ip && ip <= (ei->try_end)) {
1343 if (ei->flags == 0 && mono_object_isinst (obj,
1344 mono_class_get (m->klass->image, ei->token_or_filter))) {
1346 ctx->eip = (unsigned long)ei->handler_start;
1347 ctx->ecx = (unsigned long)obj;
1348 restore_context (ctx);
1349 g_assert_not_reached ();
1354 /* no handler found - we need to call all finally handlers */
1355 for (i = 0; i < ji->num_clauses; i++) {
1356 MonoJitExceptionInfo *ei = &ji->clauses [i];
1358 if (ei->try_start <= ip && ip < (ei->try_end) &&
1359 (ei->flags & MONO_EXCEPTION_CLAUSE_FINALLY)) {
1360 call_finally (ctx, (unsigned long)ei->handler_start);
1365 if (mono_object_isinst (obj, mono_defaults.exception_class)) {
1366 char *strace = mono_string_to_utf8 (((MonoException*)obj)->stack_trace);
1369 if (!strcmp (strace, "TODO: implement stack traces")){
1371 strace = g_strdup ("");
1374 tmp = g_strdup_printf ("%sin %s.%s:%s ()\n", strace, m->klass->name_space,
1375 m->klass->name, m->name);
1379 ((MonoException*)obj)->stack_trace = mono_string_new (domain, tmp);
1383 /* continue unwinding */
1385 /* restore caller saved registers */
1386 if (ji->used_regs & X86_ESI_MASK) {
1387 ctx->esi = *((int *)ctx->ebp + offset);
1390 if (ji->used_regs & X86_EDI_MASK) {
1391 ctx->edi = *((int *)ctx->ebp + offset);
1394 if (ji->used_regs & X86_EBX_MASK) {
1395 ctx->ebx = *((int *)ctx->ebp + offset);
1398 ctx->esp = ctx->ebp;
1399 ctx->eip = *((int *)ctx->ebp + 1);
1400 ctx->ebp = *((int *)ctx->ebp);
1402 if (ctx->ebp < (unsigned)mono_end_of_stack)
1403 arch_handle_exception (ctx, obj);
1405 mono_jit_abort (obj);
1407 gpointer *lmf_addr = TlsGetValue (lmf_thread_id);
1411 g_assert (lmf_addr);
1412 lmf = *((MonoLMF **)lmf_addr);
1415 mono_jit_abort (obj);
1419 *lmf_addr = lmf->previous_lmf;
1421 ctx->esi = lmf->esi;
1422 ctx->edi = lmf->edi;
1423 ctx->ebx = lmf->ebx;
1424 ctx->ebp = lmf->ebp;
1425 ctx->eip = lmf->eip;
1426 ctx->esp = (unsigned long)&lmf->eip;
1428 if (mono_object_isinst (obj, mono_defaults.exception_class)) {
1429 char *strace = mono_string_to_utf8 (((MonoException*)obj)->stack_trace);
1432 if (!strcmp (strace, "TODO: implement stack traces"))
1433 strace = g_strdup ("");
1435 tmp = g_strdup_printf ("%sin (unmanaged) %s.%s:%s ()\n", strace, m->klass->name_space,
1436 m->klass->name, m->name);
1440 ((MonoException*)obj)->stack_trace = mono_string_new (domain, tmp);
1444 if (ctx->eip < (unsigned)mono_end_of_stack)
1445 arch_handle_exception (ctx, obj);
1447 mono_jit_abort (obj);
1450 g_assert_not_reached ();
1454 throw_exception (unsigned long eax, unsigned long ecx, unsigned long edx, unsigned long ebx,
1455 unsigned long esi, unsigned long edi, unsigned long ebp, MonoObject *exc,
1456 unsigned long eip, unsigned long esp)
1458 struct sigcontext ctx;
1470 arch_handle_exception (&ctx, exc);
1472 g_assert_not_reached ();
1476 * arch_get_throw_exception:
1478 * Returns a function pointer which can be used to raise
1479 * exceptions. The returned function has the following
1480 * signature: void (*func) (MonoException *exc);
1481 * For example to raise an arithmetic exception you can use:
1483 * x86_push_imm (code, mono_get_exception_arithmetic ());
1484 * x86_call_code (code, arch_get_throw_exception ());
1488 arch_get_throw_exception (void)
1490 static guint8 start [24];
1491 static int inited = 0;
1500 x86_push_reg (code, X86_ESP);
1501 x86_push_membase (code, X86_ESP, 4); /* IP */
1502 x86_push_membase (code, X86_ESP, 12); /* exception */
1503 x86_push_reg (code, X86_EBP);
1504 x86_push_reg (code, X86_EDI);
1505 x86_push_reg (code, X86_ESI);
1506 x86_push_reg (code, X86_EBX);
1507 x86_push_reg (code, X86_EDX);
1508 x86_push_reg (code, X86_ECX);
1509 x86_push_reg (code, X86_EAX);
1510 x86_call_code (code, throw_exception);
1511 /* we should never reach this breakpoint */
1512 x86_breakpoint (code);
1514 g_assert ((code - start) < 24);
1519 * arch_get_throw_exception_by_name:
1521 * Returns a function pointer which can be used to raise
1522 * corlib exceptions. The returned function has the following
1523 * signature: void (*func) (char *exc_name);
1524 * For example to raise an arithmetic exception you can use:
1526 * x86_push_imm (code, "ArithmeticException");
1527 * x86_call_code (code, arch_get_throw_exception ());
1531 arch_get_throw_exception_by_name ()
1533 static guint8 start [32];
1534 static int inited = 0;
1543 /* fixme: we do not save EAX, EDX, ECD - unsure if we need that */
1545 x86_push_membase (code, X86_ESP, 4); /* exception name */
1546 x86_push_imm (code, "System");
1547 x86_push_imm (code, mono_defaults.exception_class->image);
1548 x86_call_code (code, mono_exception_from_name);
1549 x86_alu_reg_imm (code, X86_ADD, X86_ESP, 12);
1550 /* save the newly create object (overwrite exception name)*/
1551 x86_mov_membase_reg (code, X86_ESP, 4, X86_EAX, 4);
1552 x86_jump_code (code, arch_get_throw_exception ());
1554 g_assert ((code - start) < 32);
1560 * this returns a helper method to invoke a method with a user supplied
1561 * stack frame. The returned method has the following signature:
1562 * invoke_method_with_frame ((gpointer code, gpointer frame, int frame_size);
1565 get_invoke_method_with_frame ()
1567 static guint8 *start;
1573 start = code = g_malloc (64);
1576 x86_push_reg (code, X86_EBP);
1577 x86_mov_reg_reg (code, X86_EBP, X86_ESP, 4);
1578 x86_push_reg (code, X86_EBX);
1579 x86_push_reg (code, X86_EDI);
1580 x86_push_reg (code, X86_ESI);
1582 x86_mov_reg_membase (code, X86_EAX, X86_EBP, 16, 4);
1583 x86_alu_reg_reg (code, X86_SUB, X86_ESP, X86_EAX);
1585 x86_push_membase (code, X86_EBP, 16);
1586 x86_push_membase (code, X86_EBP, 12);
1587 x86_lea_membase (code, X86_EAX, X86_ESP, 2*4);
1588 x86_push_reg (code, X86_EAX);
1589 x86_call_code (code, memcpy);
1590 x86_alu_reg_imm (code, X86_ADD, X86_ESP, 12);
1592 x86_mov_reg_membase (code, X86_EAX, X86_EBP, 8, 4);
1593 x86_call_reg (code, X86_EAX);
1595 x86_mov_reg_membase (code, X86_ECX, X86_EBP, 16, 4);
1596 x86_alu_reg_reg (code, X86_ADD, X86_ESP, X86_ECX);
1599 x86_pop_reg (code, X86_ESI);
1600 x86_pop_reg (code, X86_EDI);
1601 x86_pop_reg (code, X86_EBX);
1605 g_assert ((code - start) < 64);
1611 * arch_runtime_invoke:
1612 * @method: the method to invoke
1613 * @obj: this pointer
1614 * @params: array of parameter values.
1616 * TODO: very ugly piece of code. we should replace that with a method-specific
1617 * trampoline (as suggested by Paolo).
1620 arch_runtime_invoke (MonoMethod *method, void *obj, void **params)
1622 static guint64 (*invoke_int64) (gpointer code, gpointer frame, int frame_size) = NULL;
1623 static double (*invoke_double) (gpointer code, gpointer frame, int frame_size) = NULL;
1625 MonoMethodSignature *sig = method->signature;
1626 int i, tmp, type, sp = 0;
1632 /* allocate ret object. */
1633 if (sig->ret->type == MONO_TYPE_VOID) {
1637 MonoClass *klass = mono_class_from_mono_type (sig->ret);
1638 if (klass->valuetype) {
1639 retval = mono_object_new (mono_domain_get (), klass);
1640 ret = ((char*)retval) + sizeof (MonoObject);
1646 if (ISSTRUCT (sig->ret))
1647 frame_size += sizeof (gpointer);
1650 frame_size += sizeof (gpointer);
1652 for (i = 0; i < sig->param_count; ++i) {
1654 frame_size += mono_type_stack_size (sig->params [i], &align);
1657 frame = alloca (frame_size);
1659 if (ISSTRUCT (sig->ret))
1666 for (i = 0; i < sig->param_count; ++i) {
1667 if (sig->params [i]->byref) {
1668 frame [sp++] = params [i];
1671 type = sig->params [i]->type;
1676 case MONO_TYPE_BOOLEAN:
1677 tmp = *(MonoBoolean*)params [i];
1678 frame [sp++] = (gpointer)tmp;
1682 case MONO_TYPE_CHAR:
1683 tmp = *(gint16*)params [i];
1684 frame [sp++] = (gpointer)tmp;
1686 #if SIZEOF_VOID_P == 4
1692 frame [sp++] = (gpointer)*(gint32*)params [i];
1694 #if SIZEOF_VOID_P == 8
1700 frame [sp++] = (gpointer)*(gint32*)params [i];
1701 frame [sp++] = (gpointer)*(((gint32*)params [i]) + 1);
1703 case MONO_TYPE_VALUETYPE:
1704 if (sig->params [i]->data.klass->enumtype) {
1705 type = sig->params [i]->data.klass->enum_basetype->type;
1708 g_warning ("generic valutype %s not handled in runtime invoke", sig->params [i]->data.klass->name);
1711 case MONO_TYPE_STRING:
1712 frame [sp++] = params [i];
1715 g_error ("type 0x%x not handled in invoke", sig->params [i]->type);
1719 code = arch_compile_method (method);
1722 invoke_int64 = (gpointer)invoke_double = get_invoke_method_with_frame ();
1724 type = sig->ret->type;
1727 case MONO_TYPE_VOID:
1728 invoke_int64 (code, frame, frame_size);
1732 case MONO_TYPE_BOOLEAN:
1735 case MONO_TYPE_CHAR:
1736 #if SIZEOF_VOID_P == 4
1742 case MONO_TYPE_STRING:
1743 *((guint32 *)ret) = invoke_int64 (code, frame, frame_size);
1745 #if SIZEOF_VOID_P == 8
1751 *((guint64 *)ret) = invoke_int64 (code, frame, frame_size);
1754 *((float *)ret) = invoke_double (code, frame, frame_size);
1757 *((double *)ret) = invoke_double (code, frame, frame_size);
1759 case MONO_TYPE_VALUETYPE:
1760 if (sig->params [i]->data.klass->enumtype) {
1761 type = sig->params [i]->data.klass->enum_basetype->type;
1764 invoke_int64 (code, frame, frame_size);
1767 g_error ("type 0x%x not handled in invoke", sig->params [i]->type);
1774 arch_create_native_wrapper (MonoMethod *method)
1776 MonoMethodSignature *csig = method->signature;
1778 guint8 *code, *start;
1779 int i, align, locals = 0, arg_size = 0;
1780 gboolean pinvoke = FALSE;
1781 GList *str_list = NULL;
1783 if (!(method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) &&
1784 (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL))
1787 /* compute the size of the activation frame */
1790 arg_size += sizeof (gpointer);
1792 if (csig->ret->type == MONO_TYPE_VALUETYPE) {
1793 g_assert (!csig->ret->byref);
1794 arg_size += sizeof (gpointer);
1797 for (i = 0; i < csig->param_count; ++i) {
1798 arg_size += mono_type_stack_size (csig->params [i], &align);
1799 g_assert (align == 4);
1800 if (pinvoke && (csig->params [i]->type == MONO_TYPE_STRING))
1804 start = code = g_malloc (512);
1806 /* save LMF - the instruction pointer is already on the
1807 * stack (return address) */
1809 /* save all caller saved regs */
1810 x86_push_reg (code, X86_EBX);
1811 x86_push_reg (code, X86_EDI);
1812 x86_push_reg (code, X86_ESI);
1813 x86_push_reg (code, X86_EBP);
1815 /* save method info */
1816 x86_push_imm (code, method);
1818 /* get the address of lmf for the current thread */
1819 x86_call_code (code, arch_get_lmf_addr);
1821 x86_push_reg (code, X86_EAX);
1822 /* push *lfm (previous_lmf) */
1823 x86_push_membase (code, X86_EAX, 0);
1825 x86_mov_membase_reg (code, X86_EAX, 0, X86_ESP, 4);
1827 if (method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) {
1831 /* repush all arguments */
1832 /* load argument size -4 into ECX */
1833 x86_mov_reg_imm (code, X86_ECX, (arg_size - 4));
1834 /* load source address */
1835 x86_lea_membase (code, X86_ESI, X86_ESP, sizeof (MonoLMF));
1836 /* allocate destination */
1837 x86_alu_reg_imm (code, X86_SUB, X86_ESP, arg_size);
1838 /* load destination address */
1839 x86_mov_reg_reg (code, X86_EDI, X86_ESP, 4);
1842 x86_mov_reg_memindex (code, X86_EAX, X86_ESI, 0, X86_ECX, 0, 4);
1843 x86_mov_memindex_reg (code, X86_EDI, 0, X86_ECX, 0, X86_EAX, 4);
1844 x86_alu_reg_imm (code, X86_SUB, X86_ECX, 4);
1846 x86_branch8 (code, X86_CC_GEZ, l1 - (l2 + 2), FALSE);
1849 } else if (pinvoke) {
1850 int offset = arg_size + (locals <<2) + sizeof (MonoLMF) - 4;
1853 /* allocate locals */
1855 x86_alu_reg_imm (code, X86_SUB, X86_ESP, (locals<<2));
1856 x86_mov_reg_reg (code, X86_EBP, X86_ESP, 4);
1859 for (i = csig->param_count - 1; i >= 0; i--) {
1860 MonoType *t = csig->params [i];
1864 x86_push_membase (code, X86_ESP, offset);
1871 case MONO_TYPE_BOOLEAN:
1872 case MONO_TYPE_CHAR:
1881 case MONO_TYPE_OBJECT:
1882 case MONO_TYPE_CLASS:
1883 case MONO_TYPE_SZARRAY:
1885 case MONO_TYPE_FNPTR:
1886 case MONO_TYPE_ARRAY:
1887 case MONO_TYPE_TYPEDBYREF:
1889 x86_push_membase (code, X86_ESP, offset);
1891 case MONO_TYPE_STRING:
1892 x86_push_membase (code, X86_ESP, offset);
1893 x86_call_code (code, mono_string_to_utf8);
1894 x86_mov_membase_reg (code, X86_ESP, 0, X86_EAX, 4);
1895 str_list = g_list_prepend (str_list, (gpointer)l);
1896 x86_mov_membase_reg (code, X86_EBP, l, X86_EAX, 4);
1902 x86_push_membase (code, X86_ESP, offset);
1903 x86_push_membase (code, X86_ESP, offset);
1905 case MONO_TYPE_VALUETYPE:
1906 if (t->data.klass->enumtype) {
1907 type = t->data.klass->enum_basetype->type;
1911 size = mono_type_stack_size (csig->params [i], &align);
1913 for (j = 0; j < size; j++)
1914 x86_push_membase (code, X86_ESP, offset);
1918 g_error ("type 0x%02x unknown", t->type);
1923 if (csig->ret->type == MONO_TYPE_VALUETYPE) {
1924 g_assert (!csig->ret->byref);
1925 x86_push_membase (code, X86_ESP, offset);
1928 if (csig->hasthis) {
1929 x86_push_membase (code, X86_ESP, offset);
1933 g_assert_not_reached ();
1937 /* call the native code */
1938 x86_call_code (code, method->addr);
1940 /* raise exception */
1941 x86_push_imm (code, "NotImplementedException");
1942 x86_call_code (code, arch_get_throw_exception_by_name ());
1945 /* free pinvoke string args */
1949 x86_push_reg (code, X86_EAX);
1950 x86_push_reg (code, X86_EDX);
1952 for (l = str_list; l; l = l->next) {
1953 x86_push_membase (code, X86_EBP, ((int)l->data));
1954 x86_call_code (code, g_free);
1955 x86_alu_reg_imm (code, X86_ADD, X86_ESP, 4);
1958 x86_pop_reg (code, X86_EDX);
1959 x86_pop_reg (code, X86_EAX);
1961 g_list_free (str_list);
1964 /* remove arguments from stack */
1965 if (arg_size || locals)
1966 x86_alu_reg_imm (code, X86_ADD, X86_ESP, arg_size + (locals<<2));
1968 if (pinvoke && !csig->ret->byref && (csig->ret->type == MONO_TYPE_STRING)) {
1969 /* If the argument is non-null, then convert the value back */
1970 x86_alu_reg_reg (code, X86_OR, X86_EAX, X86_EAX);
1971 x86_branch8 (code, X86_CC_EQ, 9, FALSE);
1972 x86_push_reg (code, X86_EAX);
1973 x86_call_code (code, mono_string_new_wrapper);
1974 x86_alu_reg_imm (code, X86_ADD, X86_ESP, 4);
1977 /* restore the LMF */
1979 /* ebx = previous_lmf */
1980 x86_pop_reg (code, X86_EBX);
1982 x86_pop_reg (code, X86_EDI);
1983 /* *(lmf) = previous_lmf */
1984 x86_mov_membase_reg (code, X86_EDI, 0, X86_EBX, 4);
1986 /* discard method info */
1987 x86_pop_reg (code, X86_ESI);
1989 /* restore caller saved regs */
1990 x86_pop_reg (code, X86_EBP);
1991 x86_pop_reg (code, X86_ESI);
1992 x86_pop_reg (code, X86_EDI);
1993 x86_pop_reg (code, X86_EBX);
1997 /* we store a dummy jit info (code size 4), so that mono_delegate_ctor
1998 * is able to find a method info for icalls and pinvoke methods */
1999 ji = g_new0 (MonoJitInfo, 1);
2000 ji->method = method;
2001 ji->code_start = start;
2004 ji->num_clauses = 0;
2005 mono_jit_info_table_add (mono_jit_info_table, ji);
2007 g_assert ((code - start) < 512);