2 * emit-x86.c: Support functions for emitting x86 code
5 * Dietmar Maurer (dietmar@ximian.com)
6 * Miguel de Icaza (miguel@ximian.com)
8 * (C) 2001 Ximian, Inc.
14 #include <mono/metadata/assembly.h>
15 #include <mono/metadata/loader.h>
16 #include <mono/metadata/cil-coff.h>
17 #include <mono/metadata/tabledefs.h>
18 #include <mono/metadata/class.h>
19 #include <mono/metadata/mono-endian.h>
20 #include <mono/arch/x86/x86-codegen.h>
27 enter_method (MonoMethod *method, gpointer ebp)
33 printf ("ENTER: %s.%s::%s\n(", method->klass->name_space,
34 method->klass->name, method->name);
37 if (((int)ebp & 3) != 0) {
38 g_error ("unaligned stack detected (%p)", ebp);
43 if (ISSTRUCT (method->signature->ret)) {
46 g_assert (!method->signature->ret->byref);
48 size = mono_type_stack_size (method->signature->ret, &align);
50 printf ("VALUERET:%p, ", *((gpointer *)ebp));
51 ebp += sizeof (gpointer);
54 if (method->signature->hasthis) {
55 if (method->klass->valuetype) {
56 printf ("value:%p, ", *((gpointer *)ebp));
58 o = *((MonoObject **)ebp);
62 class = o->vtable->klass;
64 if (class == mono_defaults.string_class) {
65 printf ("this:[STRING:%p:%s], ", o, mono_string_to_utf8 ((MonoString *)o));
67 printf ("this:%p[%s.%s], ", o, class->name_space, class->name);
70 ebp += sizeof (gpointer);
73 for (i = 0; i < method->signature->param_count; ++i) {
74 MonoType *type = method->signature->params [i];
76 size = mono_type_stack_size (type, &align);
79 printf ("[BYREF:%p], ", *((gpointer *)ebp));
80 } else switch (type->type) {
82 case MONO_TYPE_BOOLEAN:
92 printf ("%d, ", *((int *)(ebp)));
94 case MONO_TYPE_STRING: {
95 MonoString *s = *((MonoString **)ebp);
97 g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
98 printf ("[STRING:%p:%s], ", s, mono_string_to_utf8 (s));
100 printf ("[STRING:null], ");
103 case MONO_TYPE_CLASS:
104 case MONO_TYPE_OBJECT: {
105 o = *((MonoObject **)ebp);
107 class = o->vtable->klass;
109 if (class == mono_defaults.string_class) {
110 printf ("[STRING:%p:%s], ", o, mono_string_to_utf8 ((MonoString *)o));
111 } else if (class == mono_defaults.int32_class) {
112 printf ("[INT32:%p:%d], ", o, *(gint32 *)((gpointer)o + sizeof (MonoObject)));
114 printf ("[%s.%s:%p], ", class->name_space, class->name, o);
116 printf ("%p, ", *((gpointer *)(ebp)));
121 case MONO_TYPE_FNPTR:
122 case MONO_TYPE_ARRAY:
123 case MONO_TYPE_SZARRAY:
124 printf ("%p, ", *((gpointer *)(ebp)));
127 printf ("%lld, ", *((gint64 *)(ebp)));
130 printf ("%f, ", *((float *)(ebp)));
133 printf ("%f, ", *((double *)(ebp)));
135 case MONO_TYPE_VALUETYPE:
137 for (j = 0; j < size; j++)
138 printf ("%02x,", *((guint8*)ebp +j));
145 g_assert (align == 4);
147 ebp = (gpointer)((unsigned)ebp & ~(3));
154 leave_method (MonoMethod *method, int edx, int eax, double test)
158 printf ("LEAVE: %s.%s::%s ", method->klass->name_space,
159 method->klass->name, method->name);
161 switch (method->signature->ret->type) {
164 case MONO_TYPE_BOOLEAN:
166 printf ("TRUE:%d", eax);
180 printf ("EAX=%d", eax);
182 case MONO_TYPE_STRING: {
183 MonoString *s = (MonoString *)eax;
186 g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
187 printf ("[STRING:%p:%s]", s, mono_string_to_utf8 (s));
189 printf ("[STRING:null], ");
192 case MONO_TYPE_OBJECT: {
193 MonoObject *o = (MonoObject *)eax;
196 if (o->vtable->klass == mono_defaults.boolean_class) {
197 printf ("[BOOLEAN:%p:%d]", o, *((guint8 *)o + sizeof (MonoObject)));
198 } else if (o->vtable->klass == mono_defaults.int32_class) {
199 printf ("[INT32:%p:%d]", o, *((gint32 *)((gpointer)o + sizeof (MonoObject))));
201 printf ("[%s.%s:%p]", o->vtable->klass->name_space, o->vtable->klass->name, o);
203 printf ("[OBJECT:%p]", o);
207 case MONO_TYPE_CLASS:
209 case MONO_TYPE_FNPTR:
210 case MONO_TYPE_ARRAY:
211 case MONO_TYPE_SZARRAY:
212 printf ("EAX=%p", (gpointer)eax);
215 *((gint32 *)&l) = eax;
216 *((gint32 *)&l + 1) = edx;
217 printf ("EAX/EDX=%lld", l);
220 printf ("FP=%f\n", test);
223 printf ("(unknown return type)");
230 * arch_emit_prologue:
231 * @cfg: pointer to status information
233 * Emits the function prolog.
236 arch_emit_prologue (MonoFlowGraph *cfg)
238 x86_push_reg (cfg->code, X86_EBP);
239 x86_mov_reg_reg (cfg->code, X86_EBP, X86_ESP, 4);
241 if (cfg->locals_size)
242 x86_alu_reg_imm (cfg->code, X86_SUB, X86_ESP, cfg->locals_size);
244 if (mono_regset_reg_used (cfg->rs, X86_EBX))
245 x86_push_reg (cfg->code, X86_EBX);
247 if (mono_regset_reg_used (cfg->rs, X86_EDI))
248 x86_push_reg (cfg->code, X86_EDI);
250 if (mono_regset_reg_used (cfg->rs, X86_ESI))
251 x86_push_reg (cfg->code, X86_ESI);
253 if (mono_jit_trace_calls) {
254 x86_push_reg (cfg->code, X86_EBP);
255 x86_push_imm (cfg->code, cfg->method);
256 x86_mov_reg_imm (cfg->code, X86_EAX, enter_method);
257 x86_call_reg (cfg->code, X86_EAX);
258 x86_alu_reg_imm (cfg->code, X86_ADD, X86_ESP, 8);
263 * arch_emit_epilogue:
264 * @cfg: pointer to status information
266 * Emits the function epilog.
269 arch_emit_epilogue (MonoFlowGraph *cfg)
271 if (mono_jit_trace_calls) {
272 x86_fld_reg (cfg->code, 0);
273 x86_alu_reg_imm (cfg->code, X86_SUB, X86_ESP, 8);
274 x86_fst_membase (cfg->code, X86_ESP, 0, TRUE, TRUE);
275 x86_push_reg (cfg->code, X86_EAX);
276 x86_push_reg (cfg->code, X86_EDX);
277 x86_push_imm (cfg->code, cfg->method);
278 x86_mov_reg_imm (cfg->code, X86_EAX, leave_method);
279 x86_call_reg (cfg->code, X86_EAX);
280 x86_alu_reg_imm (cfg->code, X86_ADD, X86_ESP, 4);
281 x86_pop_reg (cfg->code, X86_EDX);
282 x86_pop_reg (cfg->code, X86_EAX);
283 x86_alu_reg_imm (cfg->code, X86_ADD, X86_ESP, 8);
286 if (mono_regset_reg_used (cfg->rs, X86_ESI))
287 x86_pop_reg (cfg->code, X86_ESI);
289 if (mono_regset_reg_used (cfg->rs, X86_EDI))
290 x86_pop_reg (cfg->code, X86_EDI);
292 if (mono_regset_reg_used (cfg->rs, X86_EBX))
293 x86_pop_reg (cfg->code, X86_EBX);
295 x86_leave (cfg->code);
300 * get_unbox_trampoline:
302 * @addr: pointer to native code for @m
304 * when value type methods are called through the vtable we need to unbox the
305 * this argument. This method returns a pointer to a trampoline which does
306 * unboxing before calling the method
309 get_unbox_trampoline (MonoMethod *m, gpointer addr)
311 guint8 *code, *start;
314 if (!m->signature->ret->byref && m->signature->ret->type == MONO_TYPE_VALUETYPE)
317 start = code = g_malloc (16);
319 x86_alu_membase_imm (code, X86_ADD, X86_ESP, this_pos, sizeof (MonoObject));
320 x86_jump_code (code, addr);
321 g_assert ((code - start) < 16);
327 * x86_magic_trampoline:
328 * @eax: saved x86 register
329 * @ecx: saved x86 register
330 * @edx: saved x86 register
331 * @esi: saved x86 register
332 * @edi: saved x86 register
333 * @ebx: saved x86 register
334 * @code: pointer into caller code
335 * @method: the method to translate
337 * This method is called by the trampoline functions for virtual
338 * methods. It inspects the caller code to find the address of the
339 * vtable slot, then calls the JIT compiler and writes the address
340 * of the compiled method back to the vtable. All virtual methods
341 * are called with: x86_call_membase (inst, basereg, disp). We always
342 * use 32 bit displacement to ensure that the length of the call
343 * instruction is 6 bytes. We need to get the value of the basereg
344 * and the constant displacement.
347 x86_magic_trampoline (int eax, int ecx, int edx, int esi, int edi,
348 int ebx, const guint8 *code, MonoMethod *m)
355 EnterCriticalSection (metadata_section);
356 addr = arch_compile_method (m);
357 LeaveCriticalSection (metadata_section);
361 /* go to the start of the call instruction
363 * address_byte = (m << 6) | (o << 3) | reg
364 * call opcode: 0xff address_byte displacement
369 if ((code [1] != 0xe8) && (code [3] == 0xff) && ((code [4] & 0x18) == 0x10) && ((code [4] >> 6) == 1)) {
370 reg = code [4] & 0x07;
371 disp = (signed char)code [5];
373 if ((code [0] == 0xff) && ((code [1] & 0x18) == 0x10) && ((code [1] >> 6) == 2)) {
374 reg = code [1] & 0x07;
375 disp = *((gint32*)(code + 2));
376 } else if ((code [1] == 0xe8)) {
377 *((guint32*)(code + 2)) = (guint)addr - ((guint)code + 1) - 5;
380 printf ("%x %x %x %x %x %x \n", code [0], code [1], code [2], code [3],
382 g_assert_not_reached ();
406 g_assert_not_reached ();
411 if (m->klass->valuetype) {
412 return *((gpointer *)o) = get_unbox_trampoline (m, addr);
414 return *((gpointer *)o) = addr;
418 * arch_create_jit_trampoline:
419 * @method: pointer to the method info
421 * Creates a trampoline function for virtual methods. If the created
422 * code is called it first starts JIT compilation of method,
423 * and then calls the newly created method. I also replaces the
424 * corresponding vtable entry (see x86_magic_trampoline).
426 * Returns: a pointer to the newly created code
429 arch_create_jit_trampoline (MonoMethod *method)
431 MonoDomain *domain = mono_domain_get ();
433 static guint8 *vc = NULL;
434 GHashTable *jit_code_hash;
436 /* icalls use method->addr */
440 /* previously created trampoline code */
444 /* check if we already have JITed code */
445 if (mono_jit_share_code)
446 jit_code_hash = mono_root_domain->jit_code_hash;
448 jit_code_hash = domain->jit_code_hash;
450 if ((code = g_hash_table_lookup (jit_code_hash, method))) {
451 mono_jit_stats.methods_lookups++;
456 vc = buf = g_malloc (256);
459 x86_push_reg (buf, X86_EBX);
460 x86_push_reg (buf, X86_EDI);
461 x86_push_reg (buf, X86_ESI);
462 x86_push_reg (buf, X86_EBP);
464 /* save the IP (caller ip) */
465 x86_push_membase (buf, X86_ESP, 20);
467 /* save method info */
468 x86_push_membase (buf, X86_ESP, 20);
469 /* get the address of lmf for the current thread */
470 x86_call_code (buf, arch_get_lmf_addr);
472 x86_push_reg (buf, X86_EAX);
473 /* push *lfm (previous_lmf) */
474 x86_push_membase (buf, X86_EAX, 0);
476 x86_mov_membase_reg (buf, X86_EAX, 0, X86_ESP, 4);
479 /* push the method info */
480 x86_push_membase (buf, X86_ESP, 32);
481 /* push the return address onto the stack */
482 x86_push_membase (buf, X86_ESP, 40);
484 /* save all register values */
485 x86_push_reg (buf, X86_EBX);
486 x86_push_reg (buf, X86_EDI);
487 x86_push_reg (buf, X86_ESI);
488 x86_push_reg (buf, X86_EDX);
489 x86_push_reg (buf, X86_ECX);
490 x86_push_reg (buf, X86_EAX);
492 x86_call_code (buf, x86_magic_trampoline);
493 x86_alu_reg_imm (buf, X86_ADD, X86_ESP, 8*4);
495 /* restore LMF start */
496 /* ebx = previous_lmf */
497 x86_pop_reg (buf, X86_EBX);
499 x86_pop_reg (buf, X86_EDI);
500 /* *(lmf) = previous_lmf */
501 x86_mov_membase_reg (buf, X86_EDI, 0, X86_EBX, 4);
502 /* discard method info */
503 x86_pop_reg (buf, X86_ESI);
504 /* discard save IP */
505 x86_pop_reg (buf, X86_ESI);
506 /* restore caller saved regs */
507 x86_pop_reg (buf, X86_EBP);
508 x86_pop_reg (buf, X86_ESI);
509 x86_pop_reg (buf, X86_EDI);
510 x86_pop_reg (buf, X86_EBX);
511 /* restore LMF end */
513 x86_alu_reg_imm (buf, X86_ADD, X86_ESP, 4);
515 /* call the compiled method */
516 x86_jump_reg (buf, X86_EAX);
518 g_assert ((buf - vc) <= 256);
521 code = buf = g_malloc (16);
522 x86_push_imm (buf, method);
523 x86_jump_code (buf, vc);
524 g_assert ((buf - code) <= 16);
526 /* store trampoline address */
529 mono_jit_stats.method_trampolines++;
535 mono_label_cfg (MonoFlowGraph *cfg)
539 for (i = 0; i < cfg->block_count; i++) {
540 GPtrArray *forest = cfg->bblocks [i].forest;
543 if (!cfg->bblocks [i].reached) /* unreachable code */
548 for (j = 0; j < top; j++) {
549 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, j);
552 mbstate = mono_burg_label (t1, cfg);
555 if (mono_debug_handle)
557 g_warning ("tree does not match");
558 mono_print_ctree (t1); printf ("\n\n");
560 mono_print_forest (forest);
561 g_assert_not_reached ();
568 tree_preallocate_regs (MBTree *tree, int goal, MonoRegSet *rs)
571 case MB_TERM_CALL_I4:
572 case MB_TERM_CALL_I8:
573 case MB_TERM_CALL_R8:
574 // case MB_TERM_CALL_VOID :
575 tree->reg1 = mono_regset_alloc_reg (rs, X86_EAX, tree->exclude_mask);
576 tree->reg2 = mono_regset_alloc_reg (rs, X86_EDX, tree->exclude_mask);
577 tree->reg3 = mono_regset_alloc_reg (rs, X86_ECX, tree->exclude_mask);
584 case MB_NTERM_lreg: {
589 tree->exclude_mask |= (1 << X86_ECX);
590 tree->left->exclude_mask |= (1 << X86_ECX);
593 case MB_TERM_MUL_OVF:
594 case MB_TERM_MUL_OVF_UN:
599 tree->reg1 = mono_regset_alloc_reg (rs, X86_EAX, tree->exclude_mask);
600 tree->reg2 = mono_regset_alloc_reg (rs, X86_EDX, tree->exclude_mask);
601 if (goal == MB_NTERM_reg) {
602 tree->left->exclude_mask |= (1 << X86_EDX);
603 tree->right->exclude_mask |= (1 << X86_EDX) | (1 << X86_EAX);
617 tree_allocate_regs (MBTree *tree, int goal, MonoRegSet *rs)
620 int ern = mono_burg_rule (tree->state, goal);
621 const guint16 *nts = mono_burg_nts [ern];
624 mono_burg_kids (tree, ern, kids);
626 //printf ("RALLOC START %d %p %d\n", tree->op, rs->free_mask, goal);
628 if (nts [0] && kids [0] == tree) {
630 tree_allocate_regs (kids [0], nts [0], rs);
634 for (i = 0; nts [i]; i++)
635 tree_preallocate_regs (kids [i], nts [i], rs);
637 for (i = 0; nts [i]; i++)
638 tree_allocate_regs (kids [i], nts [i], rs);
640 for (i = 0; nts [i]; i++) {
641 mono_regset_free_reg (rs, kids [i]->reg1);
642 mono_regset_free_reg (rs, kids [i]->reg2);
643 mono_regset_free_reg (rs, kids [i]->reg3);
648 if (tree->reg1 < 0) {
649 tree->reg1 = mono_regset_alloc_reg (rs, -1, tree->exclude_mask);
650 g_assert (tree->reg1 != -1);
655 if (tree->reg1 < 0) {
656 tree->reg1 = mono_regset_alloc_reg (rs, -1, tree->exclude_mask);
657 g_assert (tree->reg1 != -1);
659 if (tree->reg2 < 0) {
660 tree->reg2 = mono_regset_alloc_reg (rs, -1, tree->exclude_mask);
661 g_assert (tree->reg2 != -1);
666 /* fixme: allocate floating point registers */
670 if (tree->op == MB_TERM_ADD) {
671 tree->reg1 = mono_regset_alloc_reg (rs, tree->left->reg1, tree->exclude_mask);
672 tree->reg2 = mono_regset_alloc_reg (rs, tree->right->reg1, tree->exclude_mask);
677 if (tree->op == MB_TERM_ADD) {
678 tree->reg1 = mono_regset_alloc_reg (rs, tree->left->reg1, tree->exclude_mask);
683 if (tree->op == MB_TERM_SHL ||
684 tree->op == MB_TERM_MUL) {
685 tree->reg1 = mono_regset_alloc_reg (rs, tree->left->reg1, tree->exclude_mask);
693 //printf ("RALLOC END %d %p\n", tree->op, rs->free_mask);
694 tree->emit = mono_burg_func [ern];
698 arch_allocate_regs (MonoFlowGraph *cfg)
702 for (i = 0; i < cfg->block_count; i++) {
703 GPtrArray *forest = cfg->bblocks [i].forest;
706 if (!cfg->bblocks [i].reached) /* unreachable code */
711 for (j = 0; j < top; j++) {
712 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, j);
713 //printf ("AREGSTART %d:%d %p\n", i, j, cfg->rs->free_mask);
714 tree_allocate_regs (t1, 1, cfg->rs);
715 //printf ("AREGENDT %d:%d %p\n", i, j, cfg->rs->free_mask);
716 g_assert (cfg->rs->free_mask == 0xffffffff);
722 tree_emit (int goal, MonoFlowGraph *cfg, MBTree *tree)
725 int i, ern = mono_burg_rule (tree->state, goal);
726 const guint16 *nts = mono_burg_nts [ern];
730 mono_burg_kids (tree, ern, kids);
732 for (i = 0; nts [i]; i++)
733 tree_emit (nts [i], cfg, kids [i]);
735 tree->addr = offset = cfg->code - cfg->start;
737 // we assume an instruction uses a maximum of 128 bytes
738 if ((cfg->code_size - offset) <= 128) {
739 int add = MIN ((cfg->code_size * 2), 1024);
741 cfg->code_size += add;
742 mono_jit_stats.allocated_code_size += add;
743 mono_jit_stats.code_reallocs++;
744 cfg->start = g_realloc (cfg->start, cfg->code_size);
745 g_assert (cfg->start);
746 cfg->code = cfg->start + offset;
749 if ((emit = mono_burg_func [ern]))
752 g_assert ((cfg->code - cfg->start) < cfg->code_size);
756 mono_emit_cfg (MonoFlowGraph *cfg)
760 for (i = 0; i < cfg->block_count; i++) {
761 MonoBBlock *bb = &cfg->bblocks [i];
762 GPtrArray *forest = bb->forest;
765 if (!bb->reached) /* unreachable code */
770 bb->addr = cfg->code - cfg->start;
772 for (j = 0; j < top; j++) {
773 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, j);
775 tree_emit (1, cfg, t1);
779 cfg->epilog = cfg->code - cfg->start;
783 mono_compute_branches (MonoFlowGraph *cfg)
791 for (j = 0; j < cfg->block_count; j++) {
792 MonoBBlock *bb = &cfg->bblocks [j];
793 GPtrArray *forest = bb->forest;
796 if (!bb->reached) /* unreachable code */
801 for (i = 0; i < top; i++) {
802 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, i);
804 if (t1->op == MB_TERM_SWITCH) {
805 MonoBBlock **jt = (MonoBBlock **)t1->data.p;
806 guint32 *rt = (guint32 *)t1->data.p;
808 int m = *((guint32 *)t1->data.p) + 1;
811 for (j = 1; j <= m; j++)
812 rt [j] = (int)(jt [j]->addr + cfg->start);
814 /* emit the switch instruction again to update addresses */
815 cfg->code = cfg->start + t1->addr;
816 ((MBEmitFunc)t1->emit) (t1, cfg);
823 for (ji = cfg->jump_info; ji; ji = ji->next) {
824 gpointer *ip = GUINT_TO_POINTER (GPOINTER_TO_UINT (ji->ip) + cfg->start);
830 target = ji->bb->addr + cfg->start;
832 /* special case - jump to epilog */
833 target = cfg->epilog + cfg->start;
835 *ip = target - GPOINTER_TO_UINT(ip) - 4;
840 mono_add_jump_info (MonoFlowGraph *cfg, gpointer ip, gpointer target, MonoBBlock *bb)
842 MonoJumpInfo *ji = mono_mempool_alloc (cfg->mp, sizeof (MonoJumpInfo));
844 ji->ip = GUINT_TO_POINTER (GPOINTER_TO_UINT (ip) - GPOINTER_TO_UINT (cfg->start));
846 ji->next = cfg->jump_info;
853 match_debug_method (MonoMethod* method)
855 GList *tmp = mono_debug_methods;
857 for (; tmp; tmp = tmp->next) {
858 if (strcmp (method->name, tmp->data) == 0) {
866 * arch_compile_method:
867 * @method: pointer to the method info
869 * JIT compilation of a single method.
871 * Returns: a pointer to the newly created code.
874 arch_compile_method (MonoMethod *method)
876 MonoDomain *domain = mono_domain_get ();
880 GHashTable *jit_code_hash;
882 g_assert (!(method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL));
883 g_assert (!(method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL));
885 if (mono_jit_share_code)
886 jit_code_hash = mono_root_domain->jit_code_hash;
888 jit_code_hash = domain->jit_code_hash;
890 if ((addr = g_hash_table_lookup (jit_code_hash, method))) {
891 mono_jit_stats.methods_lookups++;
895 mono_jit_stats.methods_compiled++;
897 mp = mono_mempool_new ();
899 if (mono_jit_trace_calls || mono_jit_dump_asm || mono_jit_dump_forest) {
900 printf ("Start JIT compilation of %s.%s:%s\n", method->klass->name_space,
901 method->klass->name, method->name);
904 if (method->iflags & METHOD_IMPL_ATTRIBUTE_RUNTIME) {
905 MonoClassField *field;
906 const char *name = method->name;
907 static guint target_offset = 0;
908 static guint method_offset = 0;
910 gboolean delegate = FALSE;
912 if (method->klass->parent &&
913 method->klass->parent->parent == mono_defaults.delegate_class)
916 if (!target_offset) {
917 mono_class_init (mono_defaults.delegate_class);
919 field = mono_class_get_field_from_name (mono_defaults.delegate_class, "m_target");
920 target_offset = field->offset;
921 field = mono_class_get_field_from_name (mono_defaults.delegate_class, "method_ptr");
922 method_offset = field->offset;
925 if (delegate && *name == '.' && (strcmp (name, ".ctor") == 0)) {
926 addr = code = g_malloc (32);
927 x86_push_reg (code, X86_EBP);
928 x86_mov_reg_reg (code, X86_EBP, X86_ESP, 4);
930 /* load the this pointer */
931 x86_mov_reg_membase (code, X86_EAX, X86_EBP, 8, 4);
932 /* load m_target arg */
933 x86_mov_reg_membase (code, X86_EDX, X86_EBP, 12, 4);
935 x86_mov_membase_reg (code, X86_EAX, target_offset, X86_EDX, 4);
936 /* load method_ptr arg */
937 x86_mov_reg_membase (code, X86_EDX, X86_EBP, 16, 4);
938 /* store method_ptr */
939 x86_mov_membase_reg (code, X86_EAX, method_offset, X86_EDX, 4);
944 g_assert ((code - (guint8*)addr) < 32);
946 } else if (delegate && *name == 'I' && (strcmp (name, "Invoke") == 0)) {
947 MonoMethodSignature *csig = method->signature;
948 int i, arg_size, target, this_pos = 4;
951 if (csig->ret->type == MONO_TYPE_VALUETYPE) {
952 g_assert (!csig->ret->byref);
957 if (csig->param_count) {
960 for (i = 0; i < csig->param_count; ++i) {
961 arg_size += mono_type_stack_size (csig->params [i], &align);
962 g_assert (align == 4);
966 addr = g_malloc (64 + arg_size);
968 for (i = 0; i < 2; i ++) {
972 /* load the this pointer */
973 x86_mov_reg_membase (code, X86_EAX, X86_ESP, this_pos, 4);
975 x86_mov_reg_membase (code, X86_EDX, X86_EAX, target_offset, 4);
976 /* check if zero (static method call without this pointer) */
977 x86_alu_reg_imm (code, X86_CMP, X86_EDX, 0);
978 x86_branch32 (code, X86_CC_EQ, target, TRUE);
981 /* virtual delegate methods: we have to replace the this pointer
982 * withe the actual target */
983 x86_mov_membase_reg (code, X86_ESP, this_pos, X86_EDX, 4);
984 /* jump to method_ptr() */
985 x86_jump_membase (code, X86_EAX, method_offset);
987 /* static delegate methods: we have to remove the this pointer
988 * from the activation frame - I do this do creating a new
989 * stack frame an copy all arguments except the this pointer */
991 target = code - source;
992 g_assert ((arg_size & 3) == 0);
993 for (j = 0; j < (arg_size>>2); j++) {
994 x86_push_membase (code, X86_ESP, (arg_size + this_pos));
998 x86_push_membase (code, X86_ESP, (arg_size + 4));
1000 x86_call_membase (code, X86_EAX, method_offset);
1002 x86_alu_reg_imm (code, X86_ADD, X86_ESP, arg_size + 4);
1004 x86_alu_reg_imm (code, X86_ADD, X86_ESP, arg_size);
1010 g_assert ((code - (guint8*)addr) < (64 + arg_size));
1013 if (mono_debug_handle)
1016 g_error ("Don't know how to exec runtime method %s.%s::%s",
1017 method->klass->name_space, method->klass->name, method->name);
1021 MonoMethodHeader *header = ((MonoMethodNormal *)method)->header;
1022 MonoJitInfo *ji = g_new0 (MonoJitInfo, 1);
1023 gulong code_size_ratio;
1025 cfg = mono_cfg_new (method, mp);
1027 mono_analyze_flow (cfg);
1031 mono_analyze_stack (cfg);
1035 cfg->rs = mono_regset_new (X86_NREG);
1036 mono_regset_reserve_reg (cfg->rs, X86_ESP);
1037 mono_regset_reserve_reg (cfg->rs, X86_EBP);
1039 cfg->code_size = MAX (header->code_size * 5, 256);
1040 cfg->start = cfg->code = g_malloc (cfg->code_size);
1041 mono_jit_stats.allocated_code_size += cfg->code_size;
1043 if (match_debug_method (method))
1044 x86_breakpoint (cfg->code);
1046 if (mono_jit_dump_forest) {
1048 printf ("FOREST %s.%s:%s\n", method->klass->name_space,
1049 method->klass->name, method->name);
1050 for (i = 0; i < cfg->block_count; i++) {
1051 printf ("BLOCK %d:\n", i);
1052 mono_print_forest (cfg->bblocks [i].forest);
1056 mono_label_cfg (cfg);
1060 arch_allocate_regs (cfg);
1062 /* align to 8 byte boundary */
1063 cfg->locals_size += 7;
1064 cfg->locals_size &= ~7;
1066 arch_emit_prologue (cfg);
1067 mono_emit_cfg (cfg);
1068 arch_emit_epilogue (cfg);
1072 code_size_ratio = cfg->code - cfg->start;
1073 if (code_size_ratio > mono_jit_stats.biggest_method_size) {
1074 mono_jit_stats.biggest_method_size = code_size_ratio;
1075 mono_jit_stats.biggest_method = method;
1077 code_size_ratio = (code_size_ratio * 100) / header->code_size;
1078 if (code_size_ratio > mono_jit_stats.max_code_size_ratio) {
1079 mono_jit_stats.max_code_size_ratio = code_size_ratio;
1080 mono_jit_stats.max_ratio_method = method;
1083 mono_compute_branches (cfg);
1085 if (mono_jit_dump_asm) {
1086 char *id = g_strdup_printf ("%s.%s_%s", method->klass->name_space,
1087 method->klass->name, method->name);
1088 mono_disassemble_code (cfg->start, cfg->code - cfg->start, id);
1091 if (mono_debug_handle)
1092 mono_debug_add_method (mono_debug_handle, cfg);
1094 ji->code_size = cfg->code - cfg->start;
1095 ji->used_regs = cfg->rs->used_mask;
1096 ji->method = method;
1097 ji->code_start = addr;
1098 mono_jit_info_table_add (mono_jit_info_table, ji);
1100 mono_jit_stats.native_code_size += ji->code_size;
1102 if (header->num_clauses) {
1103 int i, start_block, end_block;
1105 ji->num_clauses = header->num_clauses;
1106 ji->clauses = g_new0 (MonoJitExceptionInfo, header->num_clauses);
1108 for (i = 0; i < header->num_clauses; i++) {
1109 MonoExceptionClause *ec = &header->clauses [i];
1110 MonoJitExceptionInfo *ei = &ji->clauses [i];
1112 ei->flags = ec->flags;
1113 ei->token_or_filter = ec->token_or_filter;
1115 g_assert (cfg->bcinfo [ec->try_offset].is_block_start);
1116 start_block = cfg->bcinfo [ec->try_offset].block_id;
1117 end_block = cfg->bcinfo [ec->try_offset + ec->try_len].block_id;
1118 g_assert (cfg->bcinfo [ec->try_offset + ec->try_len].is_block_start);
1120 ei->try_start = cfg->start + cfg->bblocks [start_block].addr;
1121 ei->try_end = cfg->start + cfg->bblocks [end_block].addr;
1123 g_assert (cfg->bcinfo [ec->handler_offset].is_block_start);
1124 start_block = cfg->bcinfo [ec->handler_offset].block_id;
1125 ei->handler_start = cfg->start + cfg->bblocks [start_block].addr;
1127 //printf ("TEST %x %x %x\n", ei->try_start, ei->try_end, ei->handler_start);
1131 mono_regset_free (cfg->rs);
1133 mono_cfg_free (cfg);
1135 mono_mempool_destroy (mp);
1139 if (mono_jit_trace_calls || mono_jit_dump_asm || mono_jit_dump_forest) {
1140 printf ("END JIT compilation of %s.%s:%s %p %p\n", method->klass->name_space,
1141 method->klass->name, method->name, method, addr);
1144 g_hash_table_insert (jit_code_hash, method, addr);
1150 * arch_get_restore_context:
1152 * Returns a pointer to a method which restores a previously saved sigcontext.
1155 arch_get_restore_context ()
1157 static guint8 *start = NULL;
1163 /* restore_contect (struct sigcontext *ctx) */
1164 /* we do not restore X86_EAX, X86_EDX */
1166 start = code = malloc (1024);
1169 x86_mov_reg_membase (code, X86_EAX, X86_ESP, 4, 4);
1171 /* get return address, stored in EDX */
1172 x86_mov_reg_membase (code, X86_EDX, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, eip), 4);
1175 x86_mov_reg_membase (code, X86_EBX, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, ebx), 4);
1177 x86_mov_reg_membase (code, X86_EDI, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, edi), 4);
1179 x86_mov_reg_membase (code, X86_ESI, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, esi), 4);
1181 x86_mov_reg_membase (code, X86_ESP, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, esp), 4);
1183 x86_mov_reg_membase (code, X86_EBP, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, ebp), 4);
1184 /* restore ECX. the exception object is passed here to the catch handler */
1185 x86_mov_reg_membase (code, X86_ECX, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, ecx), 4);
1187 /* jump to the saved IP */
1188 x86_jump_reg (code, X86_EDX);
1194 * arch_get_call_finally:
1196 * Returns a pointer to a method which calls a finally handler.
1199 arch_get_call_finally ()
1201 static guint8 start [28];
1202 static int inited = 0;
1209 /* call_finally (struct sigcontext *ctx, unsigned long eip) */
1212 x86_push_reg (code, X86_EBP);
1213 x86_mov_reg_reg (code, X86_EBP, X86_ESP, 4);
1214 x86_push_reg (code, X86_EBX);
1215 x86_push_reg (code, X86_EDI);
1216 x86_push_reg (code, X86_ESI);
1219 x86_mov_reg_membase (code, X86_EAX, X86_EBP, 8, 4);
1221 x86_mov_reg_membase (code, X86_ECX, X86_EBP, 12, 4);
1223 x86_push_reg (code, X86_EBP);
1225 x86_mov_reg_membase (code, X86_EBP, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, ebp), 4);
1226 /* call the handler */
1227 x86_call_reg (code, X86_ECX);
1229 x86_pop_reg (code, X86_EBP);
1230 /* restore saved regs */
1231 x86_pop_reg (code, X86_ESI);
1232 x86_pop_reg (code, X86_EDI);
1233 x86_pop_reg (code, X86_EBX);
1237 g_assert ((code - start) < 28);
1242 * arch_handle_exception:
1243 * @ctx: saved processor state
1247 arch_handle_exception (struct sigcontext *ctx, gpointer obj)
1249 MonoDomain *domain = mono_domain_get ();
1251 gpointer ip = (gpointer)ctx->eip;
1252 static void (*restore_context) (struct sigcontext *);
1253 static void (*call_finally) (struct sigcontext *, unsigned long);
1255 g_assert (ctx != NULL);
1256 g_assert (obj != NULL);
1258 ji = mono_jit_info_table_find (mono_jit_info_table, ip);
1260 if (!restore_context)
1261 restore_context = arch_get_restore_context ();
1264 call_finally = arch_get_call_finally ();
1266 if (ji) { /* we are inside managed code */
1267 MonoMethod *m = ji->method;
1270 if (ji->num_clauses) {
1273 g_assert (ji->clauses);
1275 for (i = 0; i < ji->num_clauses; i++) {
1276 MonoJitExceptionInfo *ei = &ji->clauses [i];
1278 if (ei->try_start <= ip && ip <= (ei->try_end)) {
1280 if (ei->flags == 0 && mono_object_isinst (obj,
1281 mono_class_get (m->klass->image, ei->token_or_filter))) {
1283 ctx->eip = (unsigned long)ei->handler_start;
1284 ctx->ecx = (unsigned long)obj;
1285 restore_context (ctx);
1286 g_assert_not_reached ();
1291 /* no handler found - we need to call all finally handlers */
1292 for (i = 0; i < ji->num_clauses; i++) {
1293 MonoJitExceptionInfo *ei = &ji->clauses [i];
1295 if (ei->try_start <= ip && ip < (ei->try_end) &&
1296 (ei->flags & MONO_EXCEPTION_CLAUSE_FINALLY)) {
1297 call_finally (ctx, (unsigned long)ei->handler_start);
1302 if (mono_object_isinst (obj, mono_defaults.exception_class)) {
1303 char *strace = mono_string_to_utf8 (((MonoException*)obj)->stack_trace);
1306 if (!strcmp (strace, "TODO: implement stack traces")){
1308 strace = g_strdup ("");
1311 tmp = g_strdup_printf ("%sin %s.%s:%s ()\n", strace, m->klass->name_space,
1312 m->klass->name, m->name);
1316 ((MonoException*)obj)->stack_trace = mono_string_new (domain, tmp);
1320 /* continue unwinding */
1322 /* restore caller saved registers */
1323 if (ji->used_regs & X86_ESI_MASK) {
1324 ctx->esi = *((int *)ctx->ebp + offset);
1327 if (ji->used_regs & X86_EDI_MASK) {
1328 ctx->edi = *((int *)ctx->ebp + offset);
1331 if (ji->used_regs & X86_EBX_MASK) {
1332 ctx->ebx = *((int *)ctx->ebp + offset);
1335 ctx->esp = ctx->ebp;
1336 ctx->eip = *((int *)ctx->ebp + 1);
1337 ctx->ebp = *((int *)ctx->ebp);
1339 if (ctx->ebp < (unsigned)mono_end_of_stack)
1340 arch_handle_exception (ctx, obj);
1342 mono_jit_abort (obj);
1344 gpointer *lmf_addr = TlsGetValue (lmf_thread_id);
1348 g_assert (lmf_addr);
1349 lmf = *((MonoLMF **)lmf_addr);
1352 mono_jit_abort (obj);
1356 *lmf_addr = lmf->previous_lmf;
1358 ctx->esi = lmf->esi;
1359 ctx->edi = lmf->edi;
1360 ctx->ebx = lmf->ebx;
1361 ctx->ebp = lmf->ebp;
1362 ctx->eip = lmf->eip;
1363 ctx->esp = (unsigned long)lmf;
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"))
1370 strace = g_strdup ("");
1372 tmp = g_strdup_printf ("%sin (unmanaged) %s.%s:%s ()\n", strace, m->klass->name_space,
1373 m->klass->name, m->name);
1377 ((MonoException*)obj)->stack_trace = mono_string_new (domain, tmp);
1381 if (ctx->eip < (unsigned)mono_end_of_stack)
1382 arch_handle_exception (ctx, obj);
1384 mono_jit_abort (obj);
1387 g_assert_not_reached ();
1391 throw_exception (unsigned long eax, unsigned long ecx, unsigned long edx, unsigned long ebx,
1392 unsigned long esi, unsigned long edi, unsigned long ebp, MonoObject *exc,
1393 unsigned long eip, unsigned long esp)
1395 struct sigcontext ctx;
1407 arch_handle_exception (&ctx, exc);
1409 g_assert_not_reached ();
1413 * arch_get_throw_exception:
1415 * Returns a function pointer which can be used to raise
1416 * exceptions. The returned function has the following
1417 * signature: void (*func) (MonoException *exc);
1418 * For example to raise an arithmetic exception you can use:
1420 * x86_push_imm (code, mono_get_exception_arithmetic ());
1421 * x86_call_code (code, arch_get_throw_exception ());
1425 arch_get_throw_exception (void)
1427 static guint8 start [24];
1428 static int inited = 0;
1437 x86_push_reg (code, X86_ESP);
1438 x86_push_membase (code, X86_ESP, 4); /* IP */
1439 x86_push_membase (code, X86_ESP, 12); /* exception */
1440 x86_push_reg (code, X86_EBP);
1441 x86_push_reg (code, X86_EDI);
1442 x86_push_reg (code, X86_ESI);
1443 x86_push_reg (code, X86_EBX);
1444 x86_push_reg (code, X86_EDX);
1445 x86_push_reg (code, X86_ECX);
1446 x86_push_reg (code, X86_EAX);
1447 x86_call_code (code, throw_exception);
1448 /* we should never reach this breakpoint */
1449 x86_breakpoint (code);
1451 g_assert ((code - start) < 24);
1456 * arch_get_throw_exception_by_name:
1458 * Returns a function pointer which can be used to raise
1459 * corlib exceptions. The returned function has the following
1460 * signature: void (*func) (char *exc_name);
1461 * For example to raise an arithmetic exception you can use:
1463 * x86_push_imm (code, "ArithmeticException");
1464 * x86_call_code (code, arch_get_throw_exception ());
1468 arch_get_throw_exception_by_name ()
1470 static guint8 start [32];
1471 static int inited = 0;
1480 /* fixme: we do not save EAX, EDX, ECD - unsure if we need that */
1482 x86_push_membase (code, X86_ESP, 4); /* exception name */
1483 x86_push_imm (code, "System");
1484 x86_push_imm (code, mono_defaults.exception_class->image);
1485 x86_call_code (code, mono_exception_from_name);
1486 x86_alu_reg_imm (code, X86_ADD, X86_ESP, 12);
1487 /* save the newly create object (overwrite exception name)*/
1488 x86_mov_membase_reg (code, X86_ESP, 4, X86_EAX, 4);
1489 x86_jump_code (code, arch_get_throw_exception ());
1491 g_assert ((code - start) < 32);
1497 * this returns a helper method to invoke a method with a user supplied
1498 * stack frame. The returned method has the following signature:
1499 * invoke_method_with_frame ((gpointer code, gpointer frame, int frame_size);
1502 get_invoke_method_with_frame ()
1504 static guint8 *start;
1510 start = code = malloc (64);
1513 x86_push_reg (code, X86_EBP);
1514 x86_mov_reg_reg (code, X86_EBP, X86_ESP, 4);
1515 x86_push_reg (code, X86_EBX);
1516 x86_push_reg (code, X86_EDI);
1517 x86_push_reg (code, X86_ESI);
1519 x86_mov_reg_membase (code, X86_EAX, X86_EBP, 16, 4);
1520 x86_alu_reg_reg (code, X86_SUB, X86_ESP, X86_EAX);
1522 x86_push_membase (code, X86_EBP, 16);
1523 x86_push_membase (code, X86_EBP, 12);
1524 x86_lea_membase (code, X86_EAX, X86_ESP, 2*4);
1525 x86_push_reg (code, X86_EAX);
1526 x86_call_code (code, memcpy);
1527 x86_alu_reg_imm (code, X86_ADD, X86_ESP, 12);
1529 x86_mov_reg_membase (code, X86_EAX, X86_EBP, 8, 4);
1530 x86_call_reg (code, X86_EAX);
1532 x86_mov_reg_membase (code, X86_ECX, X86_EBP, 16, 4);
1533 x86_alu_reg_reg (code, X86_ADD, X86_ESP, X86_ECX);
1536 x86_pop_reg (code, X86_ESI);
1537 x86_pop_reg (code, X86_EDI);
1538 x86_pop_reg (code, X86_EBX);
1542 g_assert ((code - start) < 64);
1548 * arch_runtime_invoke:
1549 * @method: the method to invoke
1550 * @obj: this pointer
1551 * @params: array of parameter values.
1553 * TODO: very ugly piece of code. we should replace that with a method-specific
1554 * trampoline (as suggested by Paolo).
1557 arch_runtime_invoke (MonoMethod *method, void *obj, void **params)
1559 static guint64 (*invoke_int64) (gpointer code, gpointer frame, int frame_size) = NULL;
1560 static double (*invoke_double) (gpointer code, gpointer frame, int frame_size) = NULL;
1562 MonoMethodSignature *sig = method->signature;
1563 int i, tmp, type, sp = 0;
1569 /* allocate ret object. */
1570 if (sig->ret->type == MONO_TYPE_VOID) {
1574 MonoClass *klass = mono_class_from_mono_type (sig->ret);
1575 if (klass->valuetype) {
1576 retval = mono_object_new (mono_domain_get (), klass);
1577 ret = ((char*)retval) + sizeof (MonoObject);
1583 if (ISSTRUCT (sig->ret))
1584 frame_size += sizeof (gpointer);
1587 frame_size += sizeof (gpointer);
1589 for (i = 0; i < sig->param_count; ++i) {
1591 frame_size += mono_type_stack_size (sig->params [i], &align);
1594 frame = alloca (frame_size);
1596 if (ISSTRUCT (sig->ret))
1603 for (i = 0; i < sig->param_count; ++i) {
1604 if (sig->params [i]->byref) {
1605 frame [sp++] = params [i];
1608 type = sig->params [i]->type;
1613 case MONO_TYPE_BOOLEAN:
1614 tmp = *(MonoBoolean*)params [i];
1615 frame [sp++] = (gpointer)tmp;
1619 case MONO_TYPE_CHAR:
1620 tmp = *(gint16*)params [i];
1621 frame [sp++] = (gpointer)tmp;
1623 #if SIZEOF_VOID_P == 4
1629 frame [sp++] = (gpointer)*(gint32*)params [i];
1631 #if SIZEOF_VOID_P == 8
1637 frame [sp++] = (gpointer)*(gint32*)params [i];
1638 frame [sp++] = (gpointer)*(((gint32*)params [i]) + 1);
1640 case MONO_TYPE_VALUETYPE:
1641 if (sig->params [i]->data.klass->enumtype) {
1642 type = sig->params [i]->data.klass->enum_basetype->type;
1645 g_warning ("generic valutype %s not handled in runtime invoke", sig->params [i]->data.klass->name);
1648 case MONO_TYPE_STRING:
1649 frame [sp++] = params [i];
1652 g_error ("type 0x%x not handled in invoke", sig->params [i]->type);
1657 code = method->addr;
1659 code = arch_compile_method (method);
1662 invoke_int64 = (gpointer)invoke_double = get_invoke_method_with_frame ();
1664 type = sig->ret->type;
1667 case MONO_TYPE_VOID:
1668 invoke_int64 (code, frame, frame_size);
1672 case MONO_TYPE_BOOLEAN:
1675 case MONO_TYPE_CHAR:
1676 #if SIZEOF_VOID_P == 4
1682 case MONO_TYPE_STRING:
1683 *((guint32 *)ret) = invoke_int64 (code, frame, frame_size);
1685 #if SIZEOF_VOID_P == 8
1691 *((guint64 *)ret) = invoke_int64 (code, frame, frame_size);
1694 *((float *)ret) = invoke_double (code, frame, frame_size);
1697 *((double *)ret) = invoke_double (code, frame, frame_size);
1699 case MONO_TYPE_VALUETYPE:
1700 if (sig->params [i]->data.klass->enumtype) {
1701 type = sig->params [i]->data.klass->enum_basetype->type;
1704 invoke_int64 (code, frame, frame_size);
1707 g_error ("type 0x%x not handled in invoke", sig->params [i]->type);