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 /* icalls use method->addr */
442 /* previously created trampoline code */
446 /* check if we already have JITed code */
447 if (mono_jit_share_code)
448 jit_code_hash = mono_root_domain->jit_code_hash;
450 jit_code_hash = domain->jit_code_hash;
452 if ((code = g_hash_table_lookup (jit_code_hash, method))) {
453 mono_jit_stats.methods_lookups++;
458 vc = buf = g_malloc (256);
460 /* save caller save regs because we need to do a call */
461 x86_push_reg (buf, X86_EDX);
462 x86_push_reg (buf, X86_EAX);
463 x86_push_reg (buf, X86_ECX);
466 x86_push_reg (buf, X86_EBX);
467 x86_push_reg (buf, X86_EDI);
468 x86_push_reg (buf, X86_ESI);
469 x86_push_reg (buf, X86_EBP);
471 /* save the IP (caller ip) */
472 x86_push_membase (buf, X86_ESP, 32);
474 /* save method info */
475 x86_push_membase (buf, X86_ESP, 32);
476 /* get the address of lmf for the current thread */
477 x86_call_code (buf, arch_get_lmf_addr);
479 x86_push_reg (buf, X86_EAX);
480 /* push *lfm (previous_lmf) */
481 x86_push_membase (buf, X86_EAX, 0);
483 x86_mov_membase_reg (buf, X86_EAX, 0, X86_ESP, 4);
486 /* push the method info */
487 x86_push_membase (buf, X86_ESP, 44);
488 /* push the return address onto the stack */
489 x86_push_membase (buf, X86_ESP, 52);
491 /* save all register values */
492 x86_push_reg (buf, X86_EBX);
493 x86_push_reg (buf, X86_EDI);
494 x86_push_reg (buf, X86_ESI);
495 x86_push_membase (buf, X86_ESP, 64); /* EDX */
496 x86_push_membase (buf, X86_ESP, 64); /* ECX */
497 x86_push_membase (buf, X86_ESP, 64); /* EAX */
499 x86_call_code (buf, x86_magic_trampoline);
500 x86_alu_reg_imm (buf, X86_ADD, X86_ESP, 8*4);
502 /* restore LMF start */
503 /* ebx = previous_lmf */
504 x86_pop_reg (buf, X86_EBX);
506 x86_pop_reg (buf, X86_EDI);
507 /* *(lmf) = previous_lmf */
508 x86_mov_membase_reg (buf, X86_EDI, 0, X86_EBX, 4);
509 /* discard method info */
510 x86_pop_reg (buf, X86_ESI);
511 /* discard save IP */
512 x86_pop_reg (buf, X86_ESI);
513 /* restore caller saved regs */
514 x86_pop_reg (buf, X86_EBP);
515 x86_pop_reg (buf, X86_ESI);
516 x86_pop_reg (buf, X86_EDI);
517 x86_pop_reg (buf, X86_EBX);
518 /* restore LMF end */
520 x86_alu_reg_imm (buf, X86_ADD, X86_ESP, 16);
522 /* call the compiled method */
523 x86_jump_reg (buf, X86_EAX);
525 g_assert ((buf - vc) <= 256);
528 code = buf = g_malloc (16);
529 x86_push_imm (buf, method);
530 x86_jump_code (buf, vc);
531 g_assert ((buf - code) <= 16);
533 /* store trampoline address */
536 mono_jit_stats.method_trampolines++;
542 mono_label_cfg (MonoFlowGraph *cfg)
546 for (i = 0; i < cfg->block_count; i++) {
547 GPtrArray *forest = cfg->bblocks [i].forest;
550 if (!cfg->bblocks [i].reached) /* unreachable code */
555 for (j = 0; j < top; j++) {
556 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, j);
559 mbstate = mono_burg_label (t1, cfg);
562 if (mono_debug_handle)
564 g_warning ("tree does not match");
565 mono_print_ctree (t1); printf ("\n\n");
567 mono_print_forest (forest);
568 g_assert_not_reached ();
575 tree_preallocate_regs (MBTree *tree, int goal, MonoRegSet *rs)
578 case MB_TERM_CALL_I4:
579 case MB_TERM_CALL_I8:
580 case MB_TERM_CALL_R8:
581 // case MB_TERM_CALL_VOID :
582 tree->reg1 = mono_regset_alloc_reg (rs, X86_EAX, tree->exclude_mask);
583 tree->reg2 = mono_regset_alloc_reg (rs, X86_EDX, tree->exclude_mask);
584 tree->reg3 = mono_regset_alloc_reg (rs, X86_ECX, tree->exclude_mask);
591 case MB_NTERM_lreg: {
596 tree->exclude_mask |= (1 << X86_ECX);
597 tree->left->exclude_mask |= (1 << X86_ECX);
600 case MB_TERM_MUL_OVF:
601 case MB_TERM_MUL_OVF_UN:
606 tree->reg1 = mono_regset_alloc_reg (rs, X86_EAX, tree->exclude_mask);
607 tree->reg2 = mono_regset_alloc_reg (rs, X86_EDX, tree->exclude_mask);
608 if (goal == MB_NTERM_reg) {
609 tree->left->exclude_mask |= (1 << X86_EDX);
610 tree->right->exclude_mask |= (1 << X86_EDX) | (1 << X86_EAX);
624 tree_allocate_regs (MBTree *tree, int goal, MonoRegSet *rs)
627 int ern = mono_burg_rule (tree->state, goal);
628 const guint16 *nts = mono_burg_nts [ern];
631 mono_burg_kids (tree, ern, kids);
633 //printf ("RALLOC START %d %p %d\n", tree->op, rs->free_mask, goal);
635 if (nts [0] && kids [0] == tree) {
637 tree_allocate_regs (kids [0], nts [0], rs);
641 for (i = 0; nts [i]; i++)
642 tree_preallocate_regs (kids [i], nts [i], rs);
644 for (i = 0; nts [i]; i++)
645 tree_allocate_regs (kids [i], nts [i], rs);
647 for (i = 0; nts [i]; i++) {
648 mono_regset_free_reg (rs, kids [i]->reg1);
649 mono_regset_free_reg (rs, kids [i]->reg2);
650 mono_regset_free_reg (rs, kids [i]->reg3);
655 if (tree->reg1 < 0) {
656 tree->reg1 = mono_regset_alloc_reg (rs, -1, tree->exclude_mask);
657 g_assert (tree->reg1 != -1);
662 if (tree->reg1 < 0) {
663 tree->reg1 = mono_regset_alloc_reg (rs, -1, tree->exclude_mask);
664 g_assert (tree->reg1 != -1);
666 if (tree->reg2 < 0) {
667 tree->reg2 = mono_regset_alloc_reg (rs, -1, tree->exclude_mask);
668 g_assert (tree->reg2 != -1);
673 /* fixme: allocate floating point registers */
677 if (tree->op == MB_TERM_ADD) {
678 tree->reg1 = mono_regset_alloc_reg (rs, tree->left->reg1, tree->exclude_mask);
679 tree->reg2 = mono_regset_alloc_reg (rs, tree->right->reg1, tree->exclude_mask);
684 if (tree->op == MB_TERM_ADD) {
685 tree->reg1 = mono_regset_alloc_reg (rs, tree->left->reg1, tree->exclude_mask);
690 if (tree->op == MB_TERM_SHL ||
691 tree->op == MB_TERM_MUL) {
692 tree->reg1 = mono_regset_alloc_reg (rs, tree->left->reg1, tree->exclude_mask);
700 //printf ("RALLOC END %d %p\n", tree->op, rs->free_mask);
701 tree->emit = mono_burg_func [ern];
705 arch_allocate_regs (MonoFlowGraph *cfg)
709 for (i = 0; i < cfg->block_count; i++) {
710 GPtrArray *forest = cfg->bblocks [i].forest;
713 if (!cfg->bblocks [i].reached) /* unreachable code */
718 for (j = 0; j < top; j++) {
719 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, j);
720 //printf ("AREGSTART %d:%d %p\n", i, j, cfg->rs->free_mask);
721 tree_allocate_regs (t1, 1, cfg->rs);
722 //printf ("AREGENDT %d:%d %p\n", i, j, cfg->rs->free_mask);
723 g_assert (cfg->rs->free_mask == 0xffffffff);
729 tree_emit (int goal, MonoFlowGraph *cfg, MBTree *tree)
732 int i, ern = mono_burg_rule (tree->state, goal);
733 const guint16 *nts = mono_burg_nts [ern];
737 mono_burg_kids (tree, ern, kids);
739 for (i = 0; nts [i]; i++)
740 tree_emit (nts [i], cfg, kids [i]);
742 tree->addr = offset = cfg->code - cfg->start;
744 // we assume an instruction uses a maximum of 128 bytes
745 if ((cfg->code_size - offset) <= 128) {
746 int add = MIN (cfg->code_size, 128);
747 cfg->code_size += add;
748 mono_jit_stats.code_reallocs++;
749 cfg->start = g_realloc (cfg->start, cfg->code_size);
750 g_assert (cfg->start);
751 cfg->code = cfg->start + offset;
754 if ((emit = mono_burg_func [ern]))
757 g_assert ((cfg->code - cfg->start) < cfg->code_size);
761 mono_emit_cfg (MonoFlowGraph *cfg)
765 for (i = 0; i < cfg->block_count; i++) {
766 MonoBBlock *bb = &cfg->bblocks [i];
767 GPtrArray *forest = bb->forest;
770 if (!bb->reached) /* unreachable code */
775 bb->addr = cfg->code - cfg->start;
777 for (j = 0; j < top; j++) {
778 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, j);
780 tree_emit (1, cfg, t1);
784 cfg->epilog = cfg->code - cfg->start;
788 mono_compute_branches (MonoFlowGraph *cfg)
796 for (j = 0; j < cfg->block_count; j++) {
797 MonoBBlock *bb = &cfg->bblocks [j];
798 GPtrArray *forest = bb->forest;
801 if (!bb->reached) /* unreachable code */
806 for (i = 0; i < top; i++) {
807 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, i);
809 if (t1->op == MB_TERM_SWITCH) {
810 MonoBBlock **jt = (MonoBBlock **)t1->data.p;
811 guint32 *rt = (guint32 *)t1->data.p;
813 int m = *((guint32 *)t1->data.p) + 1;
816 for (j = 1; j <= m; j++)
817 rt [j] = (int)(jt [j]->addr + cfg->start);
819 /* emit the switch instruction again to update addresses */
820 cfg->code = cfg->start + t1->addr;
821 ((MBEmitFunc)t1->emit) (t1, cfg);
828 for (ji = cfg->jump_info; ji; ji = ji->next) {
829 gpointer *ip = GUINT_TO_POINTER (GPOINTER_TO_UINT (ji->ip) + cfg->start);
833 case MONO_JUMP_INFO_BB:
834 target = ji->data.bb->addr + cfg->start;
835 *ip = target - GPOINTER_TO_UINT(ip) - 4;
837 case MONO_JUMP_INFO_ABS:
838 target = ji->data.target;
839 *ip = target - GPOINTER_TO_UINT(ip) - 4;
841 case MONO_JUMP_INFO_EPILOG:
842 target = cfg->epilog + cfg->start;
843 *ip = target - GPOINTER_TO_UINT(ip) - 4;
845 case MONO_JUMP_INFO_IP:
849 g_assert_not_reached ();
855 mono_add_jump_info (MonoFlowGraph *cfg, gpointer ip, MonoJumpInfoType type, gpointer target)
857 MonoJumpInfo *ji = mono_mempool_alloc (cfg->mp, sizeof (MonoJumpInfo));
860 ji->ip = GUINT_TO_POINTER (GPOINTER_TO_UINT (ip) - GPOINTER_TO_UINT (cfg->start));
861 ji->data.target = target;
862 ji->next = cfg->jump_info;
868 match_debug_method (MonoMethod* method)
870 GList *tmp = mono_debug_methods;
872 for (; tmp; tmp = tmp->next) {
873 if (mono_method_desc_full_match (tmp->data, method))
880 mono_delegate_ctor (MonoDelegate *this, MonoObject *target,
883 MonoDomain *domain = mono_domain_get ();
890 class = this->object.vtable->klass;
892 if (!target && (ji = mono_jit_info_table_find (mono_jit_info_table, addr)))
893 this->method_info = mono_method_get_object (domain, ji->method);
895 this->target = target;
896 this->method_ptr = addr;
901 * arch_compile_method:
902 * @method: pointer to the method info
904 * JIT compilation of a single method.
906 * Returns: a pointer to the newly created code.
909 arch_compile_method (MonoMethod *method)
911 MonoDomain *domain = mono_domain_get ();
915 GHashTable *jit_code_hash;
917 g_assert (!(method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL));
918 g_assert (!(method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL));
920 if (mono_jit_share_code)
921 jit_code_hash = mono_root_domain->jit_code_hash;
923 jit_code_hash = domain->jit_code_hash;
925 if ((addr = g_hash_table_lookup (jit_code_hash, method))) {
926 mono_jit_stats.methods_lookups++;
930 mono_jit_stats.methods_compiled++;
932 mp = mono_mempool_new ();
934 if (mono_jit_trace_calls || mono_jit_dump_asm || mono_jit_dump_forest) {
935 printf ("Start JIT compilation of %s.%s:%s\n", method->klass->name_space,
936 method->klass->name, method->name);
939 if (method->iflags & METHOD_IMPL_ATTRIBUTE_RUNTIME) {
940 const char *name = method->name;
942 gboolean delegate = FALSE;
944 if (method->klass->parent == mono_defaults.multicastdelegate_class)
947 if (delegate && *name == '.' && (strcmp (name, ".ctor") == 0)) {
948 addr = (gpointer)mono_delegate_ctor;
949 } else if (delegate && *name == 'I' && (strcmp (name, "Invoke") == 0)) {
951 * Invoke( args .. ) {
954 * return this.<m_target>( args );
957 MonoMethodSignature *csig = method->signature;
958 guint8 *br[2], *pos[2];
959 int i, arg_size, this_pos = 4;
961 if (csig->ret->type == MONO_TYPE_VALUETYPE) {
962 g_assert (!csig->ret->byref);
967 if (csig->param_count) {
970 for (i = 0; i < csig->param_count; ++i) {
971 arg_size += mono_type_stack_size (csig->params [i], &align);
972 g_assert (align == 4);
976 addr = g_malloc (64 + arg_size);
979 /* load the this pointer */
980 x86_mov_reg_membase (code, X86_EAX, X86_ESP, this_pos, 4);
983 x86_mov_reg_membase (code, X86_EDX, X86_EAX, G_STRUCT_OFFSET (MonoMulticastDelegate, prev), 4);
986 x86_alu_reg_imm (code, X86_CMP, X86_EDX, 0);
987 br[0] = code; x86_branch32 (code, X86_CC_EQ, 0, TRUE );
990 x86_push_reg( code, X86_EAX );
992 for ( i = 0; i < (arg_size>>2); i++ )
993 x86_push_membase( code, X86_ESP, (arg_size + this_pos + 4) );
995 x86_push_reg( code, X86_EDX );
997 x86_push_membase (code, X86_ESP, (arg_size + 8));
999 br[1] = code; x86_call_imm( code, 0 );
1000 pos[1] = code; x86_call_imm( br[1], addr - pos[1] );
1003 x86_alu_reg_imm (code, X86_ADD, X86_ESP, arg_size + 8);
1005 x86_alu_reg_imm (code, X86_ADD, X86_ESP, arg_size + 4);
1006 x86_pop_reg( code, X86_EAX );
1009 x86_branch32( br[0], X86_CC_EQ, code - pos[0], TRUE );
1012 x86_mov_reg_membase (code, X86_EDX, X86_EAX, G_STRUCT_OFFSET (MonoDelegate, target), 4);
1013 /* mtarget == 0 ? */
1014 x86_alu_reg_imm (code, X86_CMP, X86_EDX, 0);
1015 br[0] = code; x86_branch32 (code, X86_CC_EQ, 0, TRUE);
1019 * virtual delegate methods: we have to
1020 * replace the this pointer with the actual
1023 x86_mov_membase_reg (code, X86_ESP, this_pos, X86_EDX, 4);
1024 /* jump to method_ptr() */
1025 x86_jump_membase (code, X86_EAX, G_STRUCT_OFFSET (MonoDelegate, method_ptr));
1028 x86_branch32( br[0], X86_CC_EQ, code - pos[0], TRUE);
1030 * static delegate methods: we have to remove
1031 * the this pointer from the activation frame
1032 * - I do this creating a new stack frame anx
1033 * copy all arguments except the this pointer
1035 g_assert ((arg_size & 3) == 0);
1036 for (i = 0; i < (arg_size>>2); i++) {
1037 x86_push_membase (code, X86_ESP, (arg_size + this_pos));
1041 x86_push_membase (code, X86_ESP, (arg_size + 4));
1043 x86_call_membase (code, X86_EAX, G_STRUCT_OFFSET (MonoDelegate, method_ptr));
1046 x86_alu_reg_imm (code, X86_ADD, X86_ESP, arg_size + 4);
1048 x86_alu_reg_imm (code, X86_ADD, X86_ESP, arg_size);
1053 g_assert ((code - (guint8*)addr) < (64 + arg_size));
1055 if (mono_jit_dump_asm) {
1056 char *id = g_strdup_printf ("%s.%s_%s", method->klass->name_space,
1057 method->klass->name, method->name);
1058 mono_disassemble_code( addr, code - (guint8*)addr, id );
1062 if (mono_debug_handle)
1065 g_error ("Don't know how to exec runtime method %s.%s::%s",
1066 method->klass->name_space, method->klass->name, method->name);
1070 MonoMethodHeader *header = ((MonoMethodNormal *)method)->header;
1073 gulong code_size_ratio;
1075 ji = g_new0 (MonoJitInfo, 1);
1077 cfg = mono_cfg_new (method, mp);
1079 mono_analyze_flow (cfg);
1083 mono_analyze_stack (cfg);
1087 cfg->rs = mono_regset_new (X86_NREG);
1088 mono_regset_reserve_reg (cfg->rs, X86_ESP);
1089 mono_regset_reserve_reg (cfg->rs, X86_EBP);
1091 cfg->code_size = MAX (header->code_size * 5, 256);
1092 cfg->start = cfg->code = g_malloc (cfg->code_size);
1094 if (match_debug_method (method))
1095 x86_breakpoint (cfg->code);
1096 else if (mono_debug_handle)
1097 x86_nop (cfg->code);
1099 if (mono_jit_dump_forest) {
1101 printf ("FOREST %s.%s:%s\n", method->klass->name_space,
1102 method->klass->name, method->name);
1103 for (i = 0; i < cfg->block_count; i++) {
1104 printf ("BLOCK %d:\n", i);
1105 mono_print_forest (cfg->bblocks [i].forest);
1109 mono_label_cfg (cfg);
1113 arch_allocate_regs (cfg);
1115 /* align to 8 byte boundary */
1116 cfg->locals_size += 7;
1117 cfg->locals_size &= ~7;
1119 arch_emit_prologue (cfg);
1120 mono_emit_cfg (cfg);
1121 arch_emit_epilogue (cfg);
1125 mono_jit_stats.allocated_code_size += cfg->code_size;
1127 code_size_ratio = cfg->code - cfg->start;
1128 if (code_size_ratio > mono_jit_stats.biggest_method_size) {
1129 mono_jit_stats.biggest_method_size = code_size_ratio;
1130 mono_jit_stats.biggest_method = method;
1132 code_size_ratio = (code_size_ratio * 100) / header->code_size;
1133 if (code_size_ratio > mono_jit_stats.max_code_size_ratio) {
1134 mono_jit_stats.max_code_size_ratio = code_size_ratio;
1135 mono_jit_stats.max_ratio_method = method;
1138 mono_compute_branches (cfg);
1140 if (mono_jit_dump_asm) {
1141 char *id = g_strdup_printf ("%s.%s_%s", method->klass->name_space,
1142 method->klass->name, method->name);
1143 mono_disassemble_code (cfg->start, cfg->code - cfg->start, id);
1146 if (mono_debug_handle)
1147 mono_debug_add_method (mono_debug_handle, cfg);
1149 ji->code_size = cfg->code - cfg->start;
1150 ji->used_regs = cfg->rs->used_mask;
1151 ji->method = method;
1152 ji->code_start = addr;
1153 mono_jit_info_table_add (mono_jit_info_table, ji);
1155 mono_jit_stats.native_code_size += ji->code_size;
1157 if (header->num_clauses) {
1158 int i, start_block, end_block;
1160 ji->num_clauses = header->num_clauses;
1161 ji->clauses = g_new0 (MonoJitExceptionInfo, header->num_clauses);
1163 for (i = 0; i < header->num_clauses; i++) {
1164 MonoExceptionClause *ec = &header->clauses [i];
1165 MonoJitExceptionInfo *ei = &ji->clauses [i];
1167 ei->flags = ec->flags;
1168 ei->token_or_filter = ec->token_or_filter;
1170 g_assert (cfg->bcinfo [ec->try_offset].is_block_start);
1171 start_block = cfg->bcinfo [ec->try_offset].block_id;
1172 end_block = cfg->bcinfo [ec->try_offset + ec->try_len].block_id;
1173 g_assert (cfg->bcinfo [ec->try_offset + ec->try_len].is_block_start);
1175 ei->try_start = cfg->start + cfg->bblocks [start_block].addr;
1176 ei->try_end = cfg->start + cfg->bblocks [end_block].addr;
1178 g_assert (cfg->bcinfo [ec->handler_offset].is_block_start);
1179 start_block = cfg->bcinfo [ec->handler_offset].block_id;
1180 ei->handler_start = cfg->start + cfg->bblocks [start_block].addr;
1182 //printf ("TEST %x %x %x\n", ei->try_start, ei->try_end, ei->handler_start);
1186 mono_regset_free (cfg->rs);
1188 mono_cfg_free (cfg);
1190 mono_mempool_destroy (mp);
1194 if (mono_jit_trace_calls || mono_jit_dump_asm || mono_jit_dump_forest) {
1195 printf ("END JIT compilation of %s.%s:%s %p %p\n", method->klass->name_space,
1196 method->klass->name, method->name, method, addr);
1199 g_hash_table_insert (jit_code_hash, method, addr);
1205 * arch_get_restore_context:
1207 * Returns a pointer to a method which restores a previously saved sigcontext.
1210 arch_get_restore_context ()
1212 static guint8 *start = NULL;
1218 /* restore_contect (struct sigcontext *ctx) */
1219 /* we do not restore X86_EAX, X86_EDX */
1221 start = code = g_malloc (1024);
1224 x86_mov_reg_membase (code, X86_EAX, X86_ESP, 4, 4);
1226 /* get return address, stored in EDX */
1227 x86_mov_reg_membase (code, X86_EDX, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, eip), 4);
1229 x86_mov_reg_membase (code, X86_EBX, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, ebx), 4);
1231 x86_mov_reg_membase (code, X86_EDI, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, edi), 4);
1233 x86_mov_reg_membase (code, X86_ESI, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, esi), 4);
1235 x86_mov_reg_membase (code, X86_ESP, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, esp), 4);
1237 x86_mov_reg_membase (code, X86_EBP, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, ebp), 4);
1238 /* restore ECX. the exception object is passed here to the catch handler */
1239 x86_mov_reg_membase (code, X86_ECX, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, ecx), 4);
1241 /* jump to the saved IP */
1242 x86_jump_reg (code, X86_EDX);
1248 * arch_get_call_finally:
1250 * Returns a pointer to a method which calls a finally handler.
1253 arch_get_call_finally ()
1255 static guint8 start [28];
1256 static int inited = 0;
1263 /* call_finally (struct sigcontext *ctx, unsigned long eip) */
1266 x86_push_reg (code, X86_EBP);
1267 x86_mov_reg_reg (code, X86_EBP, X86_ESP, 4);
1268 x86_push_reg (code, X86_EBX);
1269 x86_push_reg (code, X86_EDI);
1270 x86_push_reg (code, X86_ESI);
1273 x86_mov_reg_membase (code, X86_EAX, X86_EBP, 8, 4);
1275 x86_mov_reg_membase (code, X86_ECX, X86_EBP, 12, 4);
1277 x86_push_reg (code, X86_EBP);
1279 x86_mov_reg_membase (code, X86_EBP, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, ebp), 4);
1280 /* call the handler */
1281 x86_call_reg (code, X86_ECX);
1283 x86_pop_reg (code, X86_EBP);
1284 /* restore saved regs */
1285 x86_pop_reg (code, X86_ESI);
1286 x86_pop_reg (code, X86_EDI);
1287 x86_pop_reg (code, X86_EBX);
1291 g_assert ((code - start) < 28);
1296 * arch_handle_exception:
1297 * @ctx: saved processor state
1301 arch_handle_exception (struct sigcontext *ctx, gpointer obj)
1303 MonoDomain *domain = mono_domain_get ();
1305 gpointer ip = (gpointer)ctx->eip;
1306 static void (*restore_context) (struct sigcontext *);
1307 static void (*call_finally) (struct sigcontext *, unsigned long);
1309 g_assert (ctx != NULL);
1310 g_assert (obj != NULL);
1312 ji = mono_jit_info_table_find (mono_jit_info_table, ip);
1314 if (!restore_context)
1315 restore_context = arch_get_restore_context ();
1318 call_finally = arch_get_call_finally ();
1320 if (ji) { /* we are inside managed code */
1321 MonoMethod *m = ji->method;
1324 if (ji->num_clauses) {
1327 g_assert (ji->clauses);
1329 for (i = 0; i < ji->num_clauses; i++) {
1330 MonoJitExceptionInfo *ei = &ji->clauses [i];
1332 if (ei->try_start <= ip && ip <= (ei->try_end)) {
1334 if (ei->flags == 0 && mono_object_isinst (obj,
1335 mono_class_get (m->klass->image, ei->token_or_filter))) {
1337 ctx->eip = (unsigned long)ei->handler_start;
1338 ctx->ecx = (unsigned long)obj;
1339 restore_context (ctx);
1340 g_assert_not_reached ();
1345 /* no handler found - we need to call all finally handlers */
1346 for (i = 0; i < ji->num_clauses; i++) {
1347 MonoJitExceptionInfo *ei = &ji->clauses [i];
1349 if (ei->try_start <= ip && ip < (ei->try_end) &&
1350 (ei->flags & MONO_EXCEPTION_CLAUSE_FINALLY)) {
1351 call_finally (ctx, (unsigned long)ei->handler_start);
1356 if (mono_object_isinst (obj, mono_defaults.exception_class)) {
1357 char *strace = mono_string_to_utf8 (((MonoException*)obj)->stack_trace);
1360 if (!strcmp (strace, "TODO: implement stack traces")){
1362 strace = g_strdup ("");
1365 tmp = g_strdup_printf ("%sin %s.%s:%s ()\n", strace, m->klass->name_space,
1366 m->klass->name, m->name);
1370 ((MonoException*)obj)->stack_trace = mono_string_new (domain, tmp);
1374 /* continue unwinding */
1376 /* restore caller saved registers */
1377 if (ji->used_regs & X86_ESI_MASK) {
1378 ctx->esi = *((int *)ctx->ebp + offset);
1381 if (ji->used_regs & X86_EDI_MASK) {
1382 ctx->edi = *((int *)ctx->ebp + offset);
1385 if (ji->used_regs & X86_EBX_MASK) {
1386 ctx->ebx = *((int *)ctx->ebp + offset);
1389 ctx->esp = ctx->ebp;
1390 ctx->eip = *((int *)ctx->ebp + 1);
1391 ctx->ebp = *((int *)ctx->ebp);
1393 if (ctx->ebp < (unsigned)mono_end_of_stack)
1394 arch_handle_exception (ctx, obj);
1396 mono_jit_abort (obj);
1398 gpointer *lmf_addr = TlsGetValue (lmf_thread_id);
1402 g_assert (lmf_addr);
1403 lmf = *((MonoLMF **)lmf_addr);
1406 mono_jit_abort (obj);
1410 *lmf_addr = lmf->previous_lmf;
1412 ctx->esi = lmf->esi;
1413 ctx->edi = lmf->edi;
1414 ctx->ebx = lmf->ebx;
1415 ctx->ebp = lmf->ebp;
1416 ctx->eip = lmf->eip;
1417 ctx->esp = (unsigned long)lmf;
1419 if (mono_object_isinst (obj, mono_defaults.exception_class)) {
1420 char *strace = mono_string_to_utf8 (((MonoException*)obj)->stack_trace);
1423 if (!strcmp (strace, "TODO: implement stack traces"))
1424 strace = g_strdup ("");
1426 tmp = g_strdup_printf ("%sin (unmanaged) %s.%s:%s ()\n", strace, m->klass->name_space,
1427 m->klass->name, m->name);
1431 ((MonoException*)obj)->stack_trace = mono_string_new (domain, tmp);
1435 if (ctx->eip < (unsigned)mono_end_of_stack)
1436 arch_handle_exception (ctx, obj);
1438 mono_jit_abort (obj);
1441 g_assert_not_reached ();
1445 throw_exception (unsigned long eax, unsigned long ecx, unsigned long edx, unsigned long ebx,
1446 unsigned long esi, unsigned long edi, unsigned long ebp, MonoObject *exc,
1447 unsigned long eip, unsigned long esp)
1449 struct sigcontext ctx;
1461 arch_handle_exception (&ctx, exc);
1463 g_assert_not_reached ();
1467 * arch_get_throw_exception:
1469 * Returns a function pointer which can be used to raise
1470 * exceptions. The returned function has the following
1471 * signature: void (*func) (MonoException *exc);
1472 * For example to raise an arithmetic exception you can use:
1474 * x86_push_imm (code, mono_get_exception_arithmetic ());
1475 * x86_call_code (code, arch_get_throw_exception ());
1479 arch_get_throw_exception (void)
1481 static guint8 start [24];
1482 static int inited = 0;
1491 x86_push_reg (code, X86_ESP);
1492 x86_push_membase (code, X86_ESP, 4); /* IP */
1493 x86_push_membase (code, X86_ESP, 12); /* exception */
1494 x86_push_reg (code, X86_EBP);
1495 x86_push_reg (code, X86_EDI);
1496 x86_push_reg (code, X86_ESI);
1497 x86_push_reg (code, X86_EBX);
1498 x86_push_reg (code, X86_EDX);
1499 x86_push_reg (code, X86_ECX);
1500 x86_push_reg (code, X86_EAX);
1501 x86_call_code (code, throw_exception);
1502 /* we should never reach this breakpoint */
1503 x86_breakpoint (code);
1505 g_assert ((code - start) < 24);
1510 * arch_get_throw_exception_by_name:
1512 * Returns a function pointer which can be used to raise
1513 * corlib exceptions. The returned function has the following
1514 * signature: void (*func) (char *exc_name);
1515 * For example to raise an arithmetic exception you can use:
1517 * x86_push_imm (code, "ArithmeticException");
1518 * x86_call_code (code, arch_get_throw_exception ());
1522 arch_get_throw_exception_by_name ()
1524 static guint8 start [32];
1525 static int inited = 0;
1534 /* fixme: we do not save EAX, EDX, ECD - unsure if we need that */
1536 x86_push_membase (code, X86_ESP, 4); /* exception name */
1537 x86_push_imm (code, "System");
1538 x86_push_imm (code, mono_defaults.exception_class->image);
1539 x86_call_code (code, mono_exception_from_name);
1540 x86_alu_reg_imm (code, X86_ADD, X86_ESP, 12);
1541 /* save the newly create object (overwrite exception name)*/
1542 x86_mov_membase_reg (code, X86_ESP, 4, X86_EAX, 4);
1543 x86_jump_code (code, arch_get_throw_exception ());
1545 g_assert ((code - start) < 32);
1551 * this returns a helper method to invoke a method with a user supplied
1552 * stack frame. The returned method has the following signature:
1553 * invoke_method_with_frame ((gpointer code, gpointer frame, int frame_size);
1556 get_invoke_method_with_frame ()
1558 static guint8 *start;
1564 start = code = g_malloc (64);
1567 x86_push_reg (code, X86_EBP);
1568 x86_mov_reg_reg (code, X86_EBP, X86_ESP, 4);
1569 x86_push_reg (code, X86_EBX);
1570 x86_push_reg (code, X86_EDI);
1571 x86_push_reg (code, X86_ESI);
1573 x86_mov_reg_membase (code, X86_EAX, X86_EBP, 16, 4);
1574 x86_alu_reg_reg (code, X86_SUB, X86_ESP, X86_EAX);
1576 x86_push_membase (code, X86_EBP, 16);
1577 x86_push_membase (code, X86_EBP, 12);
1578 x86_lea_membase (code, X86_EAX, X86_ESP, 2*4);
1579 x86_push_reg (code, X86_EAX);
1580 x86_call_code (code, memcpy);
1581 x86_alu_reg_imm (code, X86_ADD, X86_ESP, 12);
1583 x86_mov_reg_membase (code, X86_EAX, X86_EBP, 8, 4);
1584 x86_call_reg (code, X86_EAX);
1586 x86_mov_reg_membase (code, X86_ECX, X86_EBP, 16, 4);
1587 x86_alu_reg_reg (code, X86_ADD, X86_ESP, X86_ECX);
1590 x86_pop_reg (code, X86_ESI);
1591 x86_pop_reg (code, X86_EDI);
1592 x86_pop_reg (code, X86_EBX);
1596 g_assert ((code - start) < 64);
1602 * arch_runtime_invoke:
1603 * @method: the method to invoke
1604 * @obj: this pointer
1605 * @params: array of parameter values.
1607 * TODO: very ugly piece of code. we should replace that with a method-specific
1608 * trampoline (as suggested by Paolo).
1611 arch_runtime_invoke (MonoMethod *method, void *obj, void **params)
1613 static guint64 (*invoke_int64) (gpointer code, gpointer frame, int frame_size) = NULL;
1614 static double (*invoke_double) (gpointer code, gpointer frame, int frame_size) = NULL;
1616 MonoMethodSignature *sig = method->signature;
1617 int i, tmp, type, sp = 0;
1623 /* allocate ret object. */
1624 if (sig->ret->type == MONO_TYPE_VOID) {
1628 MonoClass *klass = mono_class_from_mono_type (sig->ret);
1629 if (klass->valuetype) {
1630 retval = mono_object_new (mono_domain_get (), klass);
1631 ret = ((char*)retval) + sizeof (MonoObject);
1637 if (ISSTRUCT (sig->ret))
1638 frame_size += sizeof (gpointer);
1641 frame_size += sizeof (gpointer);
1643 for (i = 0; i < sig->param_count; ++i) {
1645 frame_size += mono_type_stack_size (sig->params [i], &align);
1648 frame = alloca (frame_size);
1650 if (ISSTRUCT (sig->ret))
1657 for (i = 0; i < sig->param_count; ++i) {
1658 if (sig->params [i]->byref) {
1659 frame [sp++] = params [i];
1662 type = sig->params [i]->type;
1667 case MONO_TYPE_BOOLEAN:
1668 tmp = *(MonoBoolean*)params [i];
1669 frame [sp++] = (gpointer)tmp;
1673 case MONO_TYPE_CHAR:
1674 tmp = *(gint16*)params [i];
1675 frame [sp++] = (gpointer)tmp;
1677 #if SIZEOF_VOID_P == 4
1683 frame [sp++] = (gpointer)*(gint32*)params [i];
1685 #if SIZEOF_VOID_P == 8
1691 frame [sp++] = (gpointer)*(gint32*)params [i];
1692 frame [sp++] = (gpointer)*(((gint32*)params [i]) + 1);
1694 case MONO_TYPE_VALUETYPE:
1695 if (sig->params [i]->data.klass->enumtype) {
1696 type = sig->params [i]->data.klass->enum_basetype->type;
1699 g_warning ("generic valutype %s not handled in runtime invoke", sig->params [i]->data.klass->name);
1702 case MONO_TYPE_STRING:
1703 frame [sp++] = params [i];
1706 g_error ("type 0x%x not handled in invoke", sig->params [i]->type);
1711 code = method->addr;
1713 code = arch_compile_method (method);
1716 invoke_int64 = (gpointer)invoke_double = get_invoke_method_with_frame ();
1718 type = sig->ret->type;
1721 case MONO_TYPE_VOID:
1722 invoke_int64 (code, frame, frame_size);
1726 case MONO_TYPE_BOOLEAN:
1729 case MONO_TYPE_CHAR:
1730 #if SIZEOF_VOID_P == 4
1736 case MONO_TYPE_STRING:
1737 *((guint32 *)ret) = invoke_int64 (code, frame, frame_size);
1739 #if SIZEOF_VOID_P == 8
1745 *((guint64 *)ret) = invoke_int64 (code, frame, frame_size);
1748 *((float *)ret) = invoke_double (code, frame, frame_size);
1751 *((double *)ret) = invoke_double (code, frame, frame_size);
1753 case MONO_TYPE_VALUETYPE:
1754 if (sig->params [i]->data.klass->enumtype) {
1755 type = sig->params [i]->data.klass->enum_basetype->type;
1758 invoke_int64 (code, frame, frame_size);
1761 g_error ("type 0x%x not handled in invoke", sig->params [i]->type);