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 * arch_compile_method:
881 * @method: pointer to the method info
883 * JIT compilation of a single method.
885 * Returns: a pointer to the newly created code.
888 arch_compile_method (MonoMethod *method)
890 MonoDomain *domain = mono_domain_get ();
894 GHashTable *jit_code_hash;
896 g_assert (!(method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL));
897 g_assert (!(method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL));
899 if (mono_jit_share_code)
900 jit_code_hash = mono_root_domain->jit_code_hash;
902 jit_code_hash = domain->jit_code_hash;
904 if ((addr = g_hash_table_lookup (jit_code_hash, method))) {
905 mono_jit_stats.methods_lookups++;
909 mono_jit_stats.methods_compiled++;
911 mp = mono_mempool_new ();
913 if (mono_jit_trace_calls || mono_jit_dump_asm || mono_jit_dump_forest) {
914 printf ("Start JIT compilation of %s.%s:%s\n", method->klass->name_space,
915 method->klass->name, method->name);
918 if (method->iflags & METHOD_IMPL_ATTRIBUTE_RUNTIME) {
919 MonoClassField *field;
920 const char *name = method->name;
921 static guint target_offset = 0;
922 static guint method_offset = 0;
924 gboolean delegate = FALSE;
926 if (method->klass->parent &&
927 method->klass->parent->parent == mono_defaults.delegate_class)
930 if (!target_offset) {
931 mono_class_init (mono_defaults.delegate_class);
933 field = mono_class_get_field_from_name (mono_defaults.delegate_class, "m_target");
934 target_offset = field->offset;
935 field = mono_class_get_field_from_name (mono_defaults.delegate_class, "method_ptr");
936 method_offset = field->offset;
939 if (delegate && *name == '.' && (strcmp (name, ".ctor") == 0)) {
940 addr = code = g_malloc (32);
941 x86_push_reg (code, X86_EBP);
942 x86_mov_reg_reg (code, X86_EBP, X86_ESP, 4);
944 /* load the this pointer */
945 x86_mov_reg_membase (code, X86_EAX, X86_EBP, 8, 4);
946 /* load m_target arg */
947 x86_mov_reg_membase (code, X86_EDX, X86_EBP, 12, 4);
949 x86_mov_membase_reg (code, X86_EAX, target_offset, X86_EDX, 4);
950 /* load method_ptr arg */
951 x86_mov_reg_membase (code, X86_EDX, X86_EBP, 16, 4);
952 /* store method_ptr */
953 x86_mov_membase_reg (code, X86_EAX, method_offset, X86_EDX, 4);
958 g_assert ((code - (guint8*)addr) < 32);
960 } else if (delegate && *name == 'I' && (strcmp (name, "Invoke") == 0)) {
961 MonoMethodSignature *csig = method->signature;
962 int i, arg_size, target, this_pos = 4;
965 if (csig->ret->type == MONO_TYPE_VALUETYPE) {
966 g_assert (!csig->ret->byref);
971 if (csig->param_count) {
974 for (i = 0; i < csig->param_count; ++i) {
975 arg_size += mono_type_stack_size (csig->params [i], &align);
976 g_assert (align == 4);
980 addr = g_malloc (64 + arg_size);
982 for (i = 0; i < 2; i ++) {
986 /* load the this pointer */
987 x86_mov_reg_membase (code, X86_EAX, X86_ESP, this_pos, 4);
989 x86_mov_reg_membase (code, X86_EDX, X86_EAX, target_offset, 4);
990 /* check if zero (static method call without this pointer) */
991 x86_alu_reg_imm (code, X86_CMP, X86_EDX, 0);
992 x86_branch32 (code, X86_CC_EQ, target, TRUE);
995 /* virtual delegate methods: we have to replace the this pointer
996 * withe the actual target */
997 x86_mov_membase_reg (code, X86_ESP, this_pos, X86_EDX, 4);
998 /* jump to method_ptr() */
999 x86_jump_membase (code, X86_EAX, method_offset);
1001 /* static delegate methods: we have to remove the this pointer
1002 * from the activation frame - I do this do creating a new
1003 * stack frame an copy all arguments except the this pointer */
1005 target = code - source;
1006 g_assert ((arg_size & 3) == 0);
1007 for (j = 0; j < (arg_size>>2); j++) {
1008 x86_push_membase (code, X86_ESP, (arg_size + this_pos));
1012 x86_push_membase (code, X86_ESP, (arg_size + 4));
1014 x86_call_membase (code, X86_EAX, method_offset);
1016 x86_alu_reg_imm (code, X86_ADD, X86_ESP, arg_size + 4);
1018 x86_alu_reg_imm (code, X86_ADD, X86_ESP, arg_size);
1024 g_assert ((code - (guint8*)addr) < (64 + arg_size));
1027 if (mono_debug_handle)
1030 g_error ("Don't know how to exec runtime method %s.%s::%s",
1031 method->klass->name_space, method->klass->name, method->name);
1035 MonoMethodHeader *header = ((MonoMethodNormal *)method)->header;
1038 gulong code_size_ratio;
1040 ji = g_new0 (MonoJitInfo, 1);
1042 cfg = mono_cfg_new (method, mp);
1044 mono_analyze_flow (cfg);
1048 mono_analyze_stack (cfg);
1052 cfg->rs = mono_regset_new (X86_NREG);
1053 mono_regset_reserve_reg (cfg->rs, X86_ESP);
1054 mono_regset_reserve_reg (cfg->rs, X86_EBP);
1056 cfg->code_size = MAX (header->code_size * 5, 256);
1057 cfg->start = cfg->code = g_malloc (cfg->code_size);
1059 if (match_debug_method (method))
1060 x86_breakpoint (cfg->code);
1061 else if (mono_debug_handle)
1062 x86_nop (cfg->code);
1064 if (mono_jit_dump_forest) {
1066 printf ("FOREST %s.%s:%s\n", method->klass->name_space,
1067 method->klass->name, method->name);
1068 for (i = 0; i < cfg->block_count; i++) {
1069 printf ("BLOCK %d:\n", i);
1070 mono_print_forest (cfg->bblocks [i].forest);
1074 mono_label_cfg (cfg);
1078 arch_allocate_regs (cfg);
1080 /* align to 8 byte boundary */
1081 cfg->locals_size += 7;
1082 cfg->locals_size &= ~7;
1084 arch_emit_prologue (cfg);
1085 mono_emit_cfg (cfg);
1086 arch_emit_epilogue (cfg);
1090 mono_jit_stats.allocated_code_size += cfg->code_size;
1092 code_size_ratio = cfg->code - cfg->start;
1093 if (code_size_ratio > mono_jit_stats.biggest_method_size) {
1094 mono_jit_stats.biggest_method_size = code_size_ratio;
1095 mono_jit_stats.biggest_method = method;
1097 code_size_ratio = (code_size_ratio * 100) / header->code_size;
1098 if (code_size_ratio > mono_jit_stats.max_code_size_ratio) {
1099 mono_jit_stats.max_code_size_ratio = code_size_ratio;
1100 mono_jit_stats.max_ratio_method = method;
1103 mono_compute_branches (cfg);
1105 if (mono_jit_dump_asm) {
1106 char *id = g_strdup_printf ("%s.%s_%s", method->klass->name_space,
1107 method->klass->name, method->name);
1108 mono_disassemble_code (cfg->start, cfg->code - cfg->start, id);
1111 if (mono_debug_handle)
1112 mono_debug_add_method (mono_debug_handle, cfg);
1114 ji->code_size = cfg->code - cfg->start;
1115 ji->used_regs = cfg->rs->used_mask;
1116 ji->method = method;
1117 ji->code_start = addr;
1118 mono_jit_info_table_add (mono_jit_info_table, ji);
1120 mono_jit_stats.native_code_size += ji->code_size;
1122 if (header->num_clauses) {
1123 int i, start_block, end_block;
1125 ji->num_clauses = header->num_clauses;
1126 ji->clauses = g_new0 (MonoJitExceptionInfo, header->num_clauses);
1128 for (i = 0; i < header->num_clauses; i++) {
1129 MonoExceptionClause *ec = &header->clauses [i];
1130 MonoJitExceptionInfo *ei = &ji->clauses [i];
1132 ei->flags = ec->flags;
1133 ei->token_or_filter = ec->token_or_filter;
1135 g_assert (cfg->bcinfo [ec->try_offset].is_block_start);
1136 start_block = cfg->bcinfo [ec->try_offset].block_id;
1137 end_block = cfg->bcinfo [ec->try_offset + ec->try_len].block_id;
1138 g_assert (cfg->bcinfo [ec->try_offset + ec->try_len].is_block_start);
1140 ei->try_start = cfg->start + cfg->bblocks [start_block].addr;
1141 ei->try_end = cfg->start + cfg->bblocks [end_block].addr;
1143 g_assert (cfg->bcinfo [ec->handler_offset].is_block_start);
1144 start_block = cfg->bcinfo [ec->handler_offset].block_id;
1145 ei->handler_start = cfg->start + cfg->bblocks [start_block].addr;
1147 //printf ("TEST %x %x %x\n", ei->try_start, ei->try_end, ei->handler_start);
1151 mono_regset_free (cfg->rs);
1153 mono_cfg_free (cfg);
1155 mono_mempool_destroy (mp);
1159 if (mono_jit_trace_calls || mono_jit_dump_asm || mono_jit_dump_forest) {
1160 printf ("END JIT compilation of %s.%s:%s %p %p\n", method->klass->name_space,
1161 method->klass->name, method->name, method, addr);
1164 g_hash_table_insert (jit_code_hash, method, addr);
1170 * arch_get_restore_context:
1172 * Returns a pointer to a method which restores a previously saved sigcontext.
1175 arch_get_restore_context ()
1177 static guint8 *start = NULL;
1183 /* restore_contect (struct sigcontext *ctx) */
1184 /* we do not restore X86_EAX, X86_EDX */
1186 start = code = g_malloc (1024);
1189 x86_mov_reg_membase (code, X86_EAX, X86_ESP, 4, 4);
1191 /* get return address, stored in EDX */
1192 x86_mov_reg_membase (code, X86_EDX, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, eip), 4);
1195 x86_mov_reg_membase (code, X86_EBX, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, ebx), 4);
1197 x86_mov_reg_membase (code, X86_EDI, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, edi), 4);
1199 x86_mov_reg_membase (code, X86_ESI, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, esi), 4);
1201 x86_mov_reg_membase (code, X86_ESP, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, esp), 4);
1203 x86_mov_reg_membase (code, X86_EBP, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, ebp), 4);
1204 /* restore ECX. the exception object is passed here to the catch handler */
1205 x86_mov_reg_membase (code, X86_ECX, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, ecx), 4);
1207 /* jump to the saved IP */
1208 x86_jump_reg (code, X86_EDX);
1214 * arch_get_call_finally:
1216 * Returns a pointer to a method which calls a finally handler.
1219 arch_get_call_finally ()
1221 static guint8 start [28];
1222 static int inited = 0;
1229 /* call_finally (struct sigcontext *ctx, unsigned long eip) */
1232 x86_push_reg (code, X86_EBP);
1233 x86_mov_reg_reg (code, X86_EBP, X86_ESP, 4);
1234 x86_push_reg (code, X86_EBX);
1235 x86_push_reg (code, X86_EDI);
1236 x86_push_reg (code, X86_ESI);
1239 x86_mov_reg_membase (code, X86_EAX, X86_EBP, 8, 4);
1241 x86_mov_reg_membase (code, X86_ECX, X86_EBP, 12, 4);
1243 x86_push_reg (code, X86_EBP);
1245 x86_mov_reg_membase (code, X86_EBP, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, ebp), 4);
1246 /* call the handler */
1247 x86_call_reg (code, X86_ECX);
1249 x86_pop_reg (code, X86_EBP);
1250 /* restore saved regs */
1251 x86_pop_reg (code, X86_ESI);
1252 x86_pop_reg (code, X86_EDI);
1253 x86_pop_reg (code, X86_EBX);
1257 g_assert ((code - start) < 28);
1262 * arch_handle_exception:
1263 * @ctx: saved processor state
1267 arch_handle_exception (struct sigcontext *ctx, gpointer obj)
1269 MonoDomain *domain = mono_domain_get ();
1271 gpointer ip = (gpointer)ctx->eip;
1272 static void (*restore_context) (struct sigcontext *);
1273 static void (*call_finally) (struct sigcontext *, unsigned long);
1275 g_assert (ctx != NULL);
1276 g_assert (obj != NULL);
1278 ji = mono_jit_info_table_find (mono_jit_info_table, ip);
1280 if (!restore_context)
1281 restore_context = arch_get_restore_context ();
1284 call_finally = arch_get_call_finally ();
1286 if (ji) { /* we are inside managed code */
1287 MonoMethod *m = ji->method;
1290 if (ji->num_clauses) {
1293 g_assert (ji->clauses);
1295 for (i = 0; i < ji->num_clauses; i++) {
1296 MonoJitExceptionInfo *ei = &ji->clauses [i];
1298 if (ei->try_start <= ip && ip <= (ei->try_end)) {
1300 if (ei->flags == 0 && mono_object_isinst (obj,
1301 mono_class_get (m->klass->image, ei->token_or_filter))) {
1303 ctx->eip = (unsigned long)ei->handler_start;
1304 ctx->ecx = (unsigned long)obj;
1305 restore_context (ctx);
1306 g_assert_not_reached ();
1311 /* no handler found - we need to call all finally handlers */
1312 for (i = 0; i < ji->num_clauses; i++) {
1313 MonoJitExceptionInfo *ei = &ji->clauses [i];
1315 if (ei->try_start <= ip && ip < (ei->try_end) &&
1316 (ei->flags & MONO_EXCEPTION_CLAUSE_FINALLY)) {
1317 call_finally (ctx, (unsigned long)ei->handler_start);
1322 if (mono_object_isinst (obj, mono_defaults.exception_class)) {
1323 char *strace = mono_string_to_utf8 (((MonoException*)obj)->stack_trace);
1326 if (!strcmp (strace, "TODO: implement stack traces")){
1328 strace = g_strdup ("");
1331 tmp = g_strdup_printf ("%sin %s.%s:%s ()\n", strace, m->klass->name_space,
1332 m->klass->name, m->name);
1336 ((MonoException*)obj)->stack_trace = mono_string_new (domain, tmp);
1340 /* continue unwinding */
1342 /* restore caller saved registers */
1343 if (ji->used_regs & X86_ESI_MASK) {
1344 ctx->esi = *((int *)ctx->ebp + offset);
1347 if (ji->used_regs & X86_EDI_MASK) {
1348 ctx->edi = *((int *)ctx->ebp + offset);
1351 if (ji->used_regs & X86_EBX_MASK) {
1352 ctx->ebx = *((int *)ctx->ebp + offset);
1355 ctx->esp = ctx->ebp;
1356 ctx->eip = *((int *)ctx->ebp + 1);
1357 ctx->ebp = *((int *)ctx->ebp);
1359 if (ctx->ebp < (unsigned)mono_end_of_stack)
1360 arch_handle_exception (ctx, obj);
1362 mono_jit_abort (obj);
1364 gpointer *lmf_addr = TlsGetValue (lmf_thread_id);
1368 g_assert (lmf_addr);
1369 lmf = *((MonoLMF **)lmf_addr);
1372 mono_jit_abort (obj);
1376 *lmf_addr = lmf->previous_lmf;
1378 ctx->esi = lmf->esi;
1379 ctx->edi = lmf->edi;
1380 ctx->ebx = lmf->ebx;
1381 ctx->ebp = lmf->ebp;
1382 ctx->eip = lmf->eip;
1383 ctx->esp = (unsigned long)lmf;
1385 if (mono_object_isinst (obj, mono_defaults.exception_class)) {
1386 char *strace = mono_string_to_utf8 (((MonoException*)obj)->stack_trace);
1389 if (!strcmp (strace, "TODO: implement stack traces"))
1390 strace = g_strdup ("");
1392 tmp = g_strdup_printf ("%sin (unmanaged) %s.%s:%s ()\n", strace, m->klass->name_space,
1393 m->klass->name, m->name);
1397 ((MonoException*)obj)->stack_trace = mono_string_new (domain, tmp);
1401 if (ctx->eip < (unsigned)mono_end_of_stack)
1402 arch_handle_exception (ctx, obj);
1404 mono_jit_abort (obj);
1407 g_assert_not_reached ();
1411 throw_exception (unsigned long eax, unsigned long ecx, unsigned long edx, unsigned long ebx,
1412 unsigned long esi, unsigned long edi, unsigned long ebp, MonoObject *exc,
1413 unsigned long eip, unsigned long esp)
1415 struct sigcontext ctx;
1427 arch_handle_exception (&ctx, exc);
1429 g_assert_not_reached ();
1433 * arch_get_throw_exception:
1435 * Returns a function pointer which can be used to raise
1436 * exceptions. The returned function has the following
1437 * signature: void (*func) (MonoException *exc);
1438 * For example to raise an arithmetic exception you can use:
1440 * x86_push_imm (code, mono_get_exception_arithmetic ());
1441 * x86_call_code (code, arch_get_throw_exception ());
1445 arch_get_throw_exception (void)
1447 static guint8 start [24];
1448 static int inited = 0;
1457 x86_push_reg (code, X86_ESP);
1458 x86_push_membase (code, X86_ESP, 4); /* IP */
1459 x86_push_membase (code, X86_ESP, 12); /* exception */
1460 x86_push_reg (code, X86_EBP);
1461 x86_push_reg (code, X86_EDI);
1462 x86_push_reg (code, X86_ESI);
1463 x86_push_reg (code, X86_EBX);
1464 x86_push_reg (code, X86_EDX);
1465 x86_push_reg (code, X86_ECX);
1466 x86_push_reg (code, X86_EAX);
1467 x86_call_code (code, throw_exception);
1468 /* we should never reach this breakpoint */
1469 x86_breakpoint (code);
1471 g_assert ((code - start) < 24);
1476 * arch_get_throw_exception_by_name:
1478 * Returns a function pointer which can be used to raise
1479 * corlib exceptions. The returned function has the following
1480 * signature: void (*func) (char *exc_name);
1481 * For example to raise an arithmetic exception you can use:
1483 * x86_push_imm (code, "ArithmeticException");
1484 * x86_call_code (code, arch_get_throw_exception ());
1488 arch_get_throw_exception_by_name ()
1490 static guint8 start [32];
1491 static int inited = 0;
1500 /* fixme: we do not save EAX, EDX, ECD - unsure if we need that */
1502 x86_push_membase (code, X86_ESP, 4); /* exception name */
1503 x86_push_imm (code, "System");
1504 x86_push_imm (code, mono_defaults.exception_class->image);
1505 x86_call_code (code, mono_exception_from_name);
1506 x86_alu_reg_imm (code, X86_ADD, X86_ESP, 12);
1507 /* save the newly create object (overwrite exception name)*/
1508 x86_mov_membase_reg (code, X86_ESP, 4, X86_EAX, 4);
1509 x86_jump_code (code, arch_get_throw_exception ());
1511 g_assert ((code - start) < 32);
1517 * this returns a helper method to invoke a method with a user supplied
1518 * stack frame. The returned method has the following signature:
1519 * invoke_method_with_frame ((gpointer code, gpointer frame, int frame_size);
1522 get_invoke_method_with_frame ()
1524 static guint8 *start;
1530 start = code = g_malloc (64);
1533 x86_push_reg (code, X86_EBP);
1534 x86_mov_reg_reg (code, X86_EBP, X86_ESP, 4);
1535 x86_push_reg (code, X86_EBX);
1536 x86_push_reg (code, X86_EDI);
1537 x86_push_reg (code, X86_ESI);
1539 x86_mov_reg_membase (code, X86_EAX, X86_EBP, 16, 4);
1540 x86_alu_reg_reg (code, X86_SUB, X86_ESP, X86_EAX);
1542 x86_push_membase (code, X86_EBP, 16);
1543 x86_push_membase (code, X86_EBP, 12);
1544 x86_lea_membase (code, X86_EAX, X86_ESP, 2*4);
1545 x86_push_reg (code, X86_EAX);
1546 x86_call_code (code, memcpy);
1547 x86_alu_reg_imm (code, X86_ADD, X86_ESP, 12);
1549 x86_mov_reg_membase (code, X86_EAX, X86_EBP, 8, 4);
1550 x86_call_reg (code, X86_EAX);
1552 x86_mov_reg_membase (code, X86_ECX, X86_EBP, 16, 4);
1553 x86_alu_reg_reg (code, X86_ADD, X86_ESP, X86_ECX);
1556 x86_pop_reg (code, X86_ESI);
1557 x86_pop_reg (code, X86_EDI);
1558 x86_pop_reg (code, X86_EBX);
1562 g_assert ((code - start) < 64);
1568 * arch_runtime_invoke:
1569 * @method: the method to invoke
1570 * @obj: this pointer
1571 * @params: array of parameter values.
1573 * TODO: very ugly piece of code. we should replace that with a method-specific
1574 * trampoline (as suggested by Paolo).
1577 arch_runtime_invoke (MonoMethod *method, void *obj, void **params)
1579 static guint64 (*invoke_int64) (gpointer code, gpointer frame, int frame_size) = NULL;
1580 static double (*invoke_double) (gpointer code, gpointer frame, int frame_size) = NULL;
1582 MonoMethodSignature *sig = method->signature;
1583 int i, tmp, type, sp = 0;
1589 /* allocate ret object. */
1590 if (sig->ret->type == MONO_TYPE_VOID) {
1594 MonoClass *klass = mono_class_from_mono_type (sig->ret);
1595 if (klass->valuetype) {
1596 retval = mono_object_new (mono_domain_get (), klass);
1597 ret = ((char*)retval) + sizeof (MonoObject);
1603 if (ISSTRUCT (sig->ret))
1604 frame_size += sizeof (gpointer);
1607 frame_size += sizeof (gpointer);
1609 for (i = 0; i < sig->param_count; ++i) {
1611 frame_size += mono_type_stack_size (sig->params [i], &align);
1614 frame = alloca (frame_size);
1616 if (ISSTRUCT (sig->ret))
1623 for (i = 0; i < sig->param_count; ++i) {
1624 if (sig->params [i]->byref) {
1625 frame [sp++] = params [i];
1628 type = sig->params [i]->type;
1633 case MONO_TYPE_BOOLEAN:
1634 tmp = *(MonoBoolean*)params [i];
1635 frame [sp++] = (gpointer)tmp;
1639 case MONO_TYPE_CHAR:
1640 tmp = *(gint16*)params [i];
1641 frame [sp++] = (gpointer)tmp;
1643 #if SIZEOF_VOID_P == 4
1649 frame [sp++] = (gpointer)*(gint32*)params [i];
1651 #if SIZEOF_VOID_P == 8
1657 frame [sp++] = (gpointer)*(gint32*)params [i];
1658 frame [sp++] = (gpointer)*(((gint32*)params [i]) + 1);
1660 case MONO_TYPE_VALUETYPE:
1661 if (sig->params [i]->data.klass->enumtype) {
1662 type = sig->params [i]->data.klass->enum_basetype->type;
1665 g_warning ("generic valutype %s not handled in runtime invoke", sig->params [i]->data.klass->name);
1668 case MONO_TYPE_STRING:
1669 frame [sp++] = params [i];
1672 g_error ("type 0x%x not handled in invoke", sig->params [i]->type);
1677 code = method->addr;
1679 code = arch_compile_method (method);
1682 invoke_int64 = (gpointer)invoke_double = get_invoke_method_with_frame ();
1684 type = sig->ret->type;
1687 case MONO_TYPE_VOID:
1688 invoke_int64 (code, frame, frame_size);
1692 case MONO_TYPE_BOOLEAN:
1695 case MONO_TYPE_CHAR:
1696 #if SIZEOF_VOID_P == 4
1702 case MONO_TYPE_STRING:
1703 *((guint32 *)ret) = invoke_int64 (code, frame, frame_size);
1705 #if SIZEOF_VOID_P == 8
1711 *((guint64 *)ret) = invoke_int64 (code, frame, frame_size);
1714 *((float *)ret) = invoke_double (code, frame, frame_size);
1717 *((double *)ret) = invoke_double (code, frame, frame_size);
1719 case MONO_TYPE_VALUETYPE:
1720 if (sig->params [i]->data.klass->enumtype) {
1721 type = sig->params [i]->data.klass->enum_basetype->type;
1724 invoke_int64 (code, frame, frame_size);
1727 g_error ("type 0x%x not handled in invoke", sig->params [i]->type);