2 * emit-x86.c: Support functions for emitting x86 code
5 * Dietmar Maurer (dietmar@ximian.com)
6 * Miguel de Icaza (miguel@ximian.com)
8 * (C) 2001 Ximian, Inc.
14 #include <mono/metadata/assembly.h>
15 #include <mono/metadata/loader.h>
16 #include <mono/metadata/cil-coff.h>
17 #include <mono/metadata/tabledefs.h>
18 #include <mono/metadata/class.h>
19 #include <mono/metadata/mono-endian.h>
20 #include <mono/arch/x86/x86-codegen.h>
27 enter_method (MonoMethod *method, gpointer ebp)
33 printf ("ENTER: %s.%s::%s\n(", method->klass->name_space,
34 method->klass->name, method->name);
37 if (((int)ebp & 3) != 0) {
38 g_error ("unaligned stack detected (%p)", ebp);
43 if (ISSTRUCT (method->signature->ret)) {
46 g_assert (!method->signature->ret->byref);
48 size = mono_type_stack_size (method->signature->ret, &align);
50 printf ("VALUERET:%p, ", *((gpointer *)ebp));
51 ebp += sizeof (gpointer);
54 if (method->signature->hasthis) {
55 if (method->klass->valuetype) {
56 printf ("value:%p, ", *((gpointer *)ebp));
58 o = *((MonoObject **)ebp);
62 class = o->vtable->klass;
64 if (class == mono_defaults.string_class) {
65 printf ("this:[STRING:%p:%s], ", o, mono_string_to_utf8 ((MonoString *)o));
67 printf ("this:%p[%s.%s], ", o, class->name_space, class->name);
70 ebp += sizeof (gpointer);
73 for (i = 0; i < method->signature->param_count; ++i) {
74 MonoType *type = method->signature->params [i];
76 size = mono_type_stack_size (type, &align);
79 printf ("[BYREF:%p], ", *((gpointer *)ebp));
80 } else switch (type->type) {
82 case MONO_TYPE_BOOLEAN:
92 printf ("%d, ", *((int *)(ebp)));
94 case MONO_TYPE_STRING: {
95 MonoString *s = *((MonoString **)ebp);
97 g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
98 printf ("[STRING:%p:%s], ", s, mono_string_to_utf8 (s));
100 printf ("[STRING:null], ");
103 case MONO_TYPE_CLASS:
104 case MONO_TYPE_OBJECT: {
105 o = *((MonoObject **)ebp);
107 class = o->vtable->klass;
109 if (class == mono_defaults.string_class) {
110 printf ("[STRING:%p:%s], ", o, mono_string_to_utf8 ((MonoString *)o));
111 } else if (class == mono_defaults.int32_class) {
112 printf ("[INT32:%p:%d], ", o, *(gint32 *)((gpointer)o + sizeof (MonoObject)));
114 printf ("[%s.%s:%p], ", class->name_space, class->name, o);
116 printf ("%p, ", *((gpointer *)(ebp)));
121 case MONO_TYPE_FNPTR:
122 case MONO_TYPE_ARRAY:
123 case MONO_TYPE_SZARRAY:
124 printf ("%p, ", *((gpointer *)(ebp)));
127 printf ("%lld, ", *((gint64 *)(ebp)));
130 printf ("%f, ", *((float *)(ebp)));
133 printf ("%f, ", *((double *)(ebp)));
135 case MONO_TYPE_VALUETYPE:
137 for (j = 0; j < size; j++)
138 printf ("%02x,", *((guint8*)ebp +j));
145 g_assert (align == 4);
147 ebp = (gpointer)((unsigned)ebp & ~(3));
154 leave_method (MonoMethod *method, int edx, int eax, double test)
158 printf ("LEAVE: %s.%s::%s ", method->klass->name_space,
159 method->klass->name, method->name);
161 switch (method->signature->ret->type) {
164 case MONO_TYPE_BOOLEAN:
166 printf ("TRUE:%d", eax);
180 printf ("EAX=%d", eax);
182 case MONO_TYPE_STRING: {
183 MonoString *s = (MonoString *)eax;
186 g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
187 printf ("[STRING:%p:%s]", s, mono_string_to_utf8 (s));
189 printf ("[STRING:null], ");
192 case MONO_TYPE_OBJECT: {
193 MonoObject *o = (MonoObject *)eax;
196 if (o->vtable->klass == mono_defaults.boolean_class) {
197 printf ("[BOOLEAN:%p:%d]", o, *((guint8 *)o + sizeof (MonoObject)));
198 } else if (o->vtable->klass == mono_defaults.int32_class) {
199 printf ("[INT32:%p:%d]", o, *((gint32 *)((gpointer)o + sizeof (MonoObject))));
201 printf ("[%s.%s:%p]", o->vtable->klass->name_space, o->vtable->klass->name, o);
203 printf ("[OBJECT:%p]", o);
207 case MONO_TYPE_CLASS:
209 case MONO_TYPE_FNPTR:
210 case MONO_TYPE_ARRAY:
211 case MONO_TYPE_SZARRAY:
212 printf ("EAX=%p", (gpointer)eax);
215 *((gint32 *)&l) = eax;
216 *((gint32 *)&l + 1) = edx;
217 printf ("EAX/EDX=%lld", l);
220 printf ("FP=%f\n", test);
223 printf ("(unknown return type)");
230 * arch_emit_prologue:
231 * @cfg: pointer to status information
233 * Emits the function prolog.
236 arch_emit_prologue (MonoFlowGraph *cfg)
238 x86_push_reg (cfg->code, X86_EBP);
239 x86_mov_reg_reg (cfg->code, X86_EBP, X86_ESP, 4);
241 if (cfg->locals_size)
242 x86_alu_reg_imm (cfg->code, X86_SUB, X86_ESP, cfg->locals_size);
244 if (mono_regset_reg_used (cfg->rs, X86_EBX))
245 x86_push_reg (cfg->code, X86_EBX);
247 if (mono_regset_reg_used (cfg->rs, X86_EDI))
248 x86_push_reg (cfg->code, X86_EDI);
250 if (mono_regset_reg_used (cfg->rs, X86_ESI))
251 x86_push_reg (cfg->code, X86_ESI);
253 if (mono_jit_trace_calls) {
254 x86_push_reg (cfg->code, X86_EBP);
255 x86_push_imm (cfg->code, cfg->method);
256 x86_mov_reg_imm (cfg->code, X86_EAX, enter_method);
257 x86_call_reg (cfg->code, X86_EAX);
258 x86_alu_reg_imm (cfg->code, X86_ADD, X86_ESP, 8);
263 * arch_emit_epilogue:
264 * @cfg: pointer to status information
266 * Emits the function epilog.
269 arch_emit_epilogue (MonoFlowGraph *cfg)
271 if (mono_jit_trace_calls) {
272 x86_fld_reg (cfg->code, 0);
273 x86_alu_reg_imm (cfg->code, X86_SUB, X86_ESP, 8);
274 x86_fst_membase (cfg->code, X86_ESP, 0, TRUE, TRUE);
275 x86_push_reg (cfg->code, X86_EAX);
276 x86_push_reg (cfg->code, X86_EDX);
277 x86_push_imm (cfg->code, cfg->method);
278 x86_mov_reg_imm (cfg->code, X86_EAX, leave_method);
279 x86_call_reg (cfg->code, X86_EAX);
280 x86_alu_reg_imm (cfg->code, X86_ADD, X86_ESP, 4);
281 x86_pop_reg (cfg->code, X86_EDX);
282 x86_pop_reg (cfg->code, X86_EAX);
283 x86_alu_reg_imm (cfg->code, X86_ADD, X86_ESP, 8);
286 if (mono_regset_reg_used (cfg->rs, X86_ESI))
287 x86_pop_reg (cfg->code, X86_ESI);
289 if (mono_regset_reg_used (cfg->rs, X86_EDI))
290 x86_pop_reg (cfg->code, X86_EDI);
292 if (mono_regset_reg_used (cfg->rs, X86_EBX))
293 x86_pop_reg (cfg->code, X86_EBX);
295 x86_leave (cfg->code);
300 * get_unbox_trampoline:
303 * when value type methods are called through the vtable we need to unbox the
304 * this argument. This method returns a pointer to a trampoline which does
305 * unboxing before calling the method
308 get_unbox_trampoline (MonoMethod *m)
310 gpointer p = arch_compile_method (m);
311 guint8 *code, *start;
314 if (!m->signature->ret->byref && m->signature->ret->type == MONO_TYPE_VALUETYPE)
317 start = code = g_malloc (16);
319 x86_alu_membase_imm (code, X86_ADD, X86_ESP, this_pos, sizeof (MonoObject));
320 x86_jump_code (code, p);
321 g_assert ((code - start) < 16);
327 * x86_magic_trampoline:
328 * @eax: saved x86 register
329 * @ecx: saved x86 register
330 * @edx: saved x86 register
331 * @esi: saved x86 register
332 * @edi: saved x86 register
333 * @ebx: saved x86 register
334 * @code: pointer into caller code
335 * @method: the method to translate
337 * This method is called by the trampoline functions for virtual
338 * methods. It inspects the caller code to find the address of the
339 * vtable slot, then calls the JIT compiler and writes the address
340 * of the compiled method back to the vtable. All virtual methods
341 * are called with: x86_call_membase (inst, basereg, disp). We always
342 * use 32 bit displacement to ensure that the length of the call
343 * instruction is 6 bytes. We need to get the value of the basereg
344 * and the constant displacement.
347 x86_magic_trampoline (int eax, int ecx, int edx, int esi, int edi,
348 int ebx, const guint8 *code, MonoMethod *m)
354 /* go to the start of the call instruction
356 * address_byte = (m << 6) | (o << 3) | reg
357 * call opcode: 0xff address_byte displacement
362 if ((code [1] != 0xe8) && (code [3] == 0xff) && ((code [4] & 0x18) == 0x10) && ((code [4] >> 6) == 1)) {
363 reg = code [4] & 0x07;
364 disp = (signed char)code [5];
366 if ((code [0] == 0xff) && ((code [1] & 0x18) == 0x10) && ((code [1] >> 6) == 2)) {
367 reg = code [1] & 0x07;
368 disp = *((gint32*)(code + 2));
369 } else if ((code [1] == 0xe8)) {
370 gpointer addr = arch_compile_method (m);
372 *((guint32*)(code + 2)) = (guint)addr - ((guint)code + 1) - 5;
375 printf ("%x %x %x %x\n", code [0], code [1], code [2], code [3]);
376 g_assert_not_reached ();
400 g_assert_not_reached ();
405 if (m->klass->valuetype) {
406 return *((gpointer *)o) = get_unbox_trampoline (m);
408 return *((gpointer *)o) = arch_compile_method (m);
412 * arch_create_jit_trampoline:
413 * @method: pointer to the method info
415 * Creates a trampoline function for virtual methods. If the created
416 * code is called it first starts JIT compilation of method,
417 * and then calls the newly created method. I also replaces the
418 * corresponding vtable entry (see x86_magic_trampoline).
420 * Returns: a pointer to the newly created code
423 arch_create_jit_trampoline (MonoMethod *method)
425 MonoDomain *domain = mono_domain_get ();
427 static guint8 *vc = NULL;
428 GHashTable *jit_code_hash;
430 /* icalls use method->addr */
434 /* previously created trampoline code */
438 /* check if we already have JITed code */
439 if (mono_jit_share_code)
440 jit_code_hash = mono_root_domain->jit_code_hash;
442 jit_code_hash = domain->jit_code_hash;
444 if ((code = g_hash_table_lookup (jit_code_hash, method))) {
445 mono_jit_stats.methods_lookups++;
450 vc = buf = g_malloc (24);
452 /* push the return address onto the stack */
453 x86_push_membase (buf, X86_ESP, 4);
455 /* save all register values */
456 x86_push_reg (buf, X86_EBX);
457 x86_push_reg (buf, X86_EDI);
458 x86_push_reg (buf, X86_ESI);
459 x86_push_reg (buf, X86_EDX);
460 x86_push_reg (buf, X86_ECX);
461 x86_push_reg (buf, X86_EAX);
463 x86_call_code (buf, x86_magic_trampoline);
464 x86_alu_reg_imm (buf, X86_ADD, X86_ESP, 8*4);
466 /* call the compiled method */
467 x86_jump_reg (buf, X86_EAX);
469 g_assert ((buf - vc) <= 24);
472 code = buf = g_malloc (16);
473 x86_push_imm (buf, method);
474 x86_jump_code (buf, vc);
475 g_assert ((buf - code) <= 16);
477 /* store trampoline address */
480 mono_jit_stats.method_trampolines++;
486 mono_label_cfg (MonoFlowGraph *cfg)
490 for (i = 0; i < cfg->block_count; i++) {
491 GPtrArray *forest = cfg->bblocks [i].forest;
494 if (!cfg->bblocks [i].reached) /* unreachable code */
499 for (j = 0; j < top; j++) {
500 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, j);
503 mbstate = mono_burg_label (t1, cfg);
506 if (mono_debug_handle)
508 g_warning ("tree does not match");
509 mono_print_ctree (t1); printf ("\n\n");
511 mono_print_forest (forest);
512 g_assert_not_reached ();
519 tree_preallocate_regs (MBTree *tree, int goal, MonoRegSet *rs)
522 case MB_TERM_CALL_I4:
523 case MB_TERM_CALL_I8:
524 case MB_TERM_CALL_R8:
525 // case MB_TERM_CALL_VOID :
526 tree->reg1 = mono_regset_alloc_reg (rs, X86_EAX, tree->exclude_mask);
527 tree->reg2 = mono_regset_alloc_reg (rs, X86_EDX, tree->exclude_mask);
528 tree->reg3 = mono_regset_alloc_reg (rs, X86_ECX, tree->exclude_mask);
535 case MB_NTERM_lreg: {
540 tree->exclude_mask |= (1 << X86_ECX);
541 tree->left->exclude_mask |= (1 << X86_ECX);
544 case MB_TERM_MUL_OVF:
545 case MB_TERM_MUL_OVF_UN:
550 tree->reg1 = mono_regset_alloc_reg (rs, X86_EAX, tree->exclude_mask);
551 tree->reg2 = mono_regset_alloc_reg (rs, X86_EDX, tree->exclude_mask);
552 if (goal == MB_NTERM_reg) {
553 tree->left->exclude_mask |= (1 << X86_EDX);
554 tree->right->exclude_mask |= (1 << X86_EDX) | (1 << X86_EAX);
568 tree_allocate_regs (MBTree *tree, int goal, MonoRegSet *rs)
571 int ern = mono_burg_rule (tree->state, goal);
572 const guint16 *nts = mono_burg_nts [ern];
575 mono_burg_kids (tree, ern, kids);
577 //printf ("RALLOC START %d %p %d\n", tree->op, rs->free_mask, goal);
579 if (nts [0] && kids [0] == tree) {
581 tree_allocate_regs (kids [0], nts [0], rs);
585 for (i = 0; nts [i]; i++)
586 tree_preallocate_regs (kids [i], nts [i], rs);
588 for (i = 0; nts [i]; i++)
589 tree_allocate_regs (kids [i], nts [i], rs);
591 for (i = 0; nts [i]; i++) {
592 mono_regset_free_reg (rs, kids [i]->reg1);
593 mono_regset_free_reg (rs, kids [i]->reg2);
594 mono_regset_free_reg (rs, kids [i]->reg3);
599 if (tree->reg1 < 0) {
600 tree->reg1 = mono_regset_alloc_reg (rs, -1, tree->exclude_mask);
601 g_assert (tree->reg1 != -1);
606 if (tree->reg1 < 0) {
607 tree->reg1 = mono_regset_alloc_reg (rs, -1, tree->exclude_mask);
608 g_assert (tree->reg1 != -1);
610 if (tree->reg2 < 0) {
611 tree->reg2 = mono_regset_alloc_reg (rs, -1, tree->exclude_mask);
612 g_assert (tree->reg2 != -1);
617 /* fixme: allocate floating point registers */
621 if (tree->op == MB_TERM_ADD) {
622 tree->reg1 = mono_regset_alloc_reg (rs, tree->left->reg1, tree->exclude_mask);
623 tree->reg2 = mono_regset_alloc_reg (rs, tree->right->reg1, tree->exclude_mask);
628 if (tree->op == MB_TERM_ADD) {
629 tree->reg1 = mono_regset_alloc_reg (rs, tree->left->reg1, tree->exclude_mask);
634 if (tree->op == MB_TERM_SHL ||
635 tree->op == MB_TERM_MUL) {
636 tree->reg1 = mono_regset_alloc_reg (rs, tree->left->reg1, tree->exclude_mask);
644 //printf ("RALLOC END %d %p\n", tree->op, rs->free_mask);
645 tree->emit = mono_burg_func [ern];
649 arch_allocate_regs (MonoFlowGraph *cfg)
653 for (i = 0; i < cfg->block_count; i++) {
654 GPtrArray *forest = cfg->bblocks [i].forest;
657 if (!cfg->bblocks [i].reached) /* unreachable code */
662 for (j = 0; j < top; j++) {
663 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, j);
664 //printf ("AREGSTART %d:%d %p\n", i, j, cfg->rs->free_mask);
665 tree_allocate_regs (t1, 1, cfg->rs);
666 //printf ("AREGENDT %d:%d %p\n", i, j, cfg->rs->free_mask);
667 g_assert (cfg->rs->free_mask == 0xffffffff);
673 tree_emit (int goal, MonoFlowGraph *cfg, MBTree *tree)
676 int i, ern = mono_burg_rule (tree->state, goal);
677 const guint16 *nts = mono_burg_nts [ern];
681 mono_burg_kids (tree, ern, kids);
683 for (i = 0; nts [i]; i++)
684 tree_emit (nts [i], cfg, kids [i]);
686 tree->addr = offset = cfg->code - cfg->start;
688 // we assume an instruction uses a maximum of 128 bytes
689 if ((cfg->code_size - offset) <= 128) {
690 int add = MIN ((cfg->code_size * 2), 1024);
692 cfg->code_size += add;
693 mono_jit_stats.allocated_code_size += add;
694 mono_jit_stats.code_reallocs++;
695 cfg->start = g_realloc (cfg->start, cfg->code_size);
696 g_assert (cfg->start);
697 cfg->code = cfg->start + offset;
700 if ((emit = mono_burg_func [ern]))
703 g_assert ((cfg->code - cfg->start) < cfg->code_size);
707 mono_emit_cfg (MonoFlowGraph *cfg)
711 for (i = 0; i < cfg->block_count; i++) {
712 MonoBBlock *bb = &cfg->bblocks [i];
713 GPtrArray *forest = bb->forest;
716 if (!bb->reached) /* unreachable code */
721 bb->addr = cfg->code - cfg->start;
723 for (j = 0; j < top; j++) {
724 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, j);
726 tree_emit (1, cfg, t1);
730 cfg->epilog = cfg->code - cfg->start;
734 mono_compute_branches (MonoFlowGraph *cfg)
741 for (j = 0; j < cfg->block_count; j++) {
742 MonoBBlock *bb = &cfg->bblocks [j];
743 GPtrArray *forest = bb->forest;
746 if (!bb->reached) /* unreachable code */
751 for (i = 0; i < top; i++) {
752 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, i);
756 if (t1->op == MB_TERM_SWITCH) {
757 MonoBBlock **jt = (MonoBBlock **)t1->data.p;
758 guint32 *rt = (guint32 *)t1->data.p;
760 int m = *((guint32 *)t1->data.p) + 1;
763 for (j = 1; j <= m; j++)
764 rt [j] = (int)(jt [j]->addr + cfg->start);
767 /* emit the jump instruction again to update addresses */
768 cfg->code = cfg->start + t1->addr;
769 ((MBEmitFunc)t1->emit) (t1, cfg);
779 match_debug_method (MonoMethod* method)
781 GList *tmp = mono_debug_methods;
783 for (; tmp; tmp = tmp->next) {
784 if (strcmp (method->name, tmp->data) == 0) {
792 * arch_compile_method:
793 * @method: pointer to the method info
795 * JIT compilation of a single method.
797 * Returns: a pointer to the newly created code.
800 arch_compile_method (MonoMethod *method)
802 MonoDomain *domain = mono_domain_get ();
806 GHashTable *jit_code_hash;
808 g_assert (!(method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL));
809 g_assert (!(method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL));
811 if (mono_jit_share_code)
812 jit_code_hash = mono_root_domain->jit_code_hash;
814 jit_code_hash = domain->jit_code_hash;
816 if ((addr = g_hash_table_lookup (jit_code_hash, method))) {
817 mono_jit_stats.methods_lookups++;
821 mono_jit_stats.methods_compiled++;
823 mp = mono_mempool_new ();
825 if (mono_jit_trace_calls || mono_jit_dump_asm || mono_jit_dump_forest) {
826 printf ("Start JIT compilation of %s.%s:%s\n", method->klass->name_space,
827 method->klass->name, method->name);
830 if (method->iflags & METHOD_IMPL_ATTRIBUTE_RUNTIME) {
831 MonoClassField *field;
832 const char *name = method->name;
833 static guint target_offset = 0;
834 static guint method_offset = 0;
836 gboolean delegate = FALSE;
838 if (method->klass->parent &&
839 method->klass->parent->parent == mono_defaults.delegate_class)
842 if (!target_offset) {
843 mono_class_init (mono_defaults.delegate_class);
845 field = mono_class_get_field_from_name (mono_defaults.delegate_class, "m_target");
846 target_offset = field->offset;
847 field = mono_class_get_field_from_name (mono_defaults.delegate_class, "method_ptr");
848 method_offset = field->offset;
851 if (delegate && *name == '.' && (strcmp (name, ".ctor") == 0)) {
852 addr = code = g_malloc (32);
853 x86_push_reg (code, X86_EBP);
854 x86_mov_reg_reg (code, X86_EBP, X86_ESP, 4);
856 /* load the this pointer */
857 x86_mov_reg_membase (code, X86_EAX, X86_EBP, 8, 4);
858 /* load m_target arg */
859 x86_mov_reg_membase (code, X86_EDX, X86_EBP, 12, 4);
861 x86_mov_membase_reg (code, X86_EAX, target_offset, X86_EDX, 4);
862 /* load method_ptr arg */
863 x86_mov_reg_membase (code, X86_EDX, X86_EBP, 16, 4);
864 /* store method_ptr */
865 x86_mov_membase_reg (code, X86_EAX, method_offset, X86_EDX, 4);
870 g_assert ((code - (guint8*)addr) < 32);
872 } else if (delegate && *name == 'I' && (strcmp (name, "Invoke") == 0)) {
873 MonoMethodSignature *csig = method->signature;
874 int i, arg_size, target, this_pos = 4;
877 if (csig->ret->type == MONO_TYPE_VALUETYPE) {
878 g_assert (!csig->ret->byref);
883 if (csig->param_count) {
886 for (i = 0; i < csig->param_count; ++i) {
887 arg_size += mono_type_stack_size (csig->params [i], &align);
888 g_assert (align == 4);
892 addr = g_malloc (64 + arg_size);
894 for (i = 0; i < 2; i ++) {
898 /* load the this pointer */
899 x86_mov_reg_membase (code, X86_EAX, X86_ESP, this_pos, 4);
901 x86_mov_reg_membase (code, X86_EDX, X86_EAX, target_offset, 4);
902 /* check if zero (static method call without this pointer) */
903 x86_alu_reg_imm (code, X86_CMP, X86_EDX, 0);
904 x86_branch32 (code, X86_CC_EQ, target, TRUE);
907 /* virtual delegate methods: we have to replace the this pointer
908 * withe the actual target */
909 x86_mov_membase_reg (code, X86_ESP, this_pos, X86_EDX, 4);
910 /* jump to method_ptr() */
911 x86_jump_membase (code, X86_EAX, method_offset);
913 /* static delegate methods: we have to remove the this pointer
914 * from the activation frame - I do this do creating a new
915 * stack frame an copy all arguments except the this pointer */
917 target = code - source;
918 g_assert ((arg_size & 3) == 0);
919 for (j = 0; j < (arg_size>>2); j++) {
920 x86_push_membase (code, X86_ESP, (arg_size + this_pos));
924 x86_push_membase (code, X86_ESP, (arg_size + 4));
926 x86_call_membase (code, X86_EAX, method_offset);
928 x86_alu_reg_imm (code, X86_ADD, X86_ESP, arg_size + 4);
930 x86_alu_reg_imm (code, X86_ADD, X86_ESP, arg_size);
936 g_assert ((code - (guint8*)addr) < (64 + arg_size));
939 if (mono_debug_handle)
941 g_error ("Don't know how to exec runtime method %s.%s::%s",
942 method->klass->name_space, method->klass->name, method->name);
946 MonoMethodHeader *header = ((MonoMethodNormal *)method)->header;
947 MonoJitInfo *ji = g_new0 (MonoJitInfo, 1);
948 gulong code_size_ratio;
950 cfg = mono_cfg_new (method, mp);
952 mono_analyze_flow (cfg);
956 mono_analyze_stack (cfg);
960 cfg->rs = mono_regset_new (X86_NREG);
961 mono_regset_reserve_reg (cfg->rs, X86_ESP);
962 mono_regset_reserve_reg (cfg->rs, X86_EBP);
964 cfg->code_size = 256000;
965 cfg->start = cfg->code = g_malloc (cfg->code_size);
966 mono_jit_stats.allocated_code_size += cfg->code_size;
968 if (match_debug_method (method))
969 x86_breakpoint (cfg->code);
971 if (mono_jit_dump_forest) {
973 printf ("FOREST %s.%s:%s\n", method->klass->name_space,
974 method->klass->name, method->name);
975 for (i = 0; i < cfg->block_count; i++) {
976 printf ("BLOCK %d:\n", i);
977 mono_print_forest (cfg->bblocks [i].forest);
981 mono_label_cfg (cfg);
985 arch_allocate_regs (cfg);
987 /* align to 8 byte boundary */
988 cfg->locals_size += 7;
989 cfg->locals_size &= ~7;
991 arch_emit_prologue (cfg);
993 arch_emit_epilogue (cfg);
997 code_size_ratio = cfg->code - cfg->start;
998 if (code_size_ratio > mono_jit_stats.biggest_method_size) {
999 mono_jit_stats.biggest_method_size = code_size_ratio;
1000 mono_jit_stats.biggest_method = method;
1002 code_size_ratio = (code_size_ratio * 100) / header->code_size;
1003 if (code_size_ratio > mono_jit_stats.max_code_size_ratio) {
1004 mono_jit_stats.max_code_size_ratio = code_size_ratio;
1005 mono_jit_stats.max_ratio_method = method;
1008 mono_compute_branches (cfg);
1010 if (mono_jit_dump_asm) {
1011 char *id = g_strdup_printf ("%s.%s_%s", method->klass->name_space,
1012 method->klass->name, method->name);
1013 mono_disassemble_code (cfg->start, cfg->code - cfg->start, id);
1016 if (mono_debug_handle)
1017 mono_debug_add_method (mono_debug_handle, cfg);
1019 ji->code_size = cfg->code - cfg->start;
1020 ji->used_regs = cfg->rs->used_mask;
1021 ji->method = method;
1022 ji->code_start = addr;
1023 mono_jit_info_table_add (mono_jit_info_table, ji);
1025 mono_jit_stats.native_code_size += ji->code_size;
1027 if (header->num_clauses) {
1028 int i, start_block, end_block;
1030 ji->num_clauses = header->num_clauses;
1031 ji->clauses = g_new0 (MonoJitExceptionInfo, header->num_clauses);
1033 for (i = 0; i < header->num_clauses; i++) {
1034 MonoExceptionClause *ec = &header->clauses [i];
1035 MonoJitExceptionInfo *ei = &ji->clauses [i];
1037 ei->flags = ec->flags;
1038 ei->token_or_filter = ec->token_or_filter;
1040 g_assert (cfg->bcinfo [ec->try_offset].is_block_start);
1041 start_block = cfg->bcinfo [ec->try_offset].block_id;
1042 end_block = cfg->bcinfo [ec->try_offset + ec->try_len].block_id;
1043 g_assert (cfg->bcinfo [ec->try_offset + ec->try_len].is_block_start);
1045 ei->try_start = cfg->start + cfg->bblocks [start_block].addr;
1046 ei->try_end = cfg->start + cfg->bblocks [end_block].addr;
1048 g_assert (cfg->bcinfo [ec->handler_offset].is_block_start);
1049 start_block = cfg->bcinfo [ec->handler_offset].block_id;
1050 ei->handler_start = cfg->start + cfg->bblocks [start_block].addr;
1052 //printf ("TEST %x %x %x\n", ei->try_start, ei->try_end, ei->handler_start);
1056 mono_regset_free (cfg->rs);
1058 mono_cfg_free (cfg);
1060 mono_mempool_destroy (mp);
1064 if (mono_jit_trace_calls || mono_jit_dump_asm || mono_jit_dump_forest) {
1065 printf ("END JIT compilation of %s.%s:%s %p %p\n", method->klass->name_space,
1066 method->klass->name, method->name, method, addr);
1069 g_hash_table_insert (jit_code_hash, method, addr);
1075 * arch_get_restore_context:
1077 * Returns a pointer to a method which restores a previously saved sigcontext.
1080 arch_get_restore_context ()
1082 static guint8 *start = NULL;
1088 /* restore_contect (struct sigcontext *ctx) */
1089 /* we do not restore X86_EAX, X86_EDX */
1091 start = code = malloc (1024);
1094 x86_mov_reg_membase (code, X86_EAX, X86_ESP, 4, 4);
1096 /* get return address, stored in EDX */
1097 x86_mov_reg_membase (code, X86_EDX, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, eip), 4);
1100 x86_mov_reg_membase (code, X86_EBX, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, ebx), 4);
1102 x86_mov_reg_membase (code, X86_EDI, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, edi), 4);
1104 x86_mov_reg_membase (code, X86_ESI, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, esi), 4);
1106 x86_mov_reg_membase (code, X86_ESP, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, esp), 4);
1108 x86_mov_reg_membase (code, X86_EBP, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, ebp), 4);
1109 /* restore ECX. the exception object is passed here to the catch handler */
1110 x86_mov_reg_membase (code, X86_ECX, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, ecx), 4);
1112 /* jump to the saved IP */
1113 x86_jump_reg (code, X86_EDX);
1119 * arch_get_call_finally:
1121 * Returns a pointer to a method which calls a finally handler.
1124 arch_get_call_finally ()
1126 static guint8 start [28];
1127 static int inited = 0;
1134 /* call_finally (struct sigcontext *ctx, unsigned long eip) */
1137 x86_push_reg (code, X86_EBP);
1138 x86_mov_reg_reg (code, X86_EBP, X86_ESP, 4);
1139 x86_push_reg (code, X86_EBX);
1140 x86_push_reg (code, X86_EDI);
1141 x86_push_reg (code, X86_ESI);
1144 x86_mov_reg_membase (code, X86_EAX, X86_EBP, 8, 4);
1146 x86_mov_reg_membase (code, X86_ECX, X86_EBP, 12, 4);
1148 x86_push_reg (code, X86_EBP);
1150 x86_mov_reg_membase (code, X86_EBP, X86_EAX, G_STRUCT_OFFSET (struct sigcontext, ebp), 4);
1151 /* call the handler */
1152 x86_call_reg (code, X86_ECX);
1154 x86_pop_reg (code, X86_EBP);
1155 /* restore saved regs */
1156 x86_pop_reg (code, X86_ESI);
1157 x86_pop_reg (code, X86_EDI);
1158 x86_pop_reg (code, X86_EBX);
1162 g_assert ((code - start) < 28);
1167 * arch_handle_exception:
1168 * @ctx: saved processor state
1172 arch_handle_exception (struct sigcontext *ctx, gpointer obj)
1174 MonoDomain *domain = mono_domain_get ();
1176 gpointer ip = (gpointer)ctx->eip;
1177 static void (*restore_context) (struct sigcontext *);
1178 static void (*call_finally) (struct sigcontext *, unsigned long);
1180 g_assert (ctx != NULL);
1181 g_assert (obj != NULL);
1183 ji = mono_jit_info_table_find (mono_jit_info_table, ip);
1185 if (!restore_context)
1186 restore_context = arch_get_restore_context ();
1189 call_finally = arch_get_call_finally ();
1191 if (ji) { /* we are inside managed code */
1192 MonoMethod *m = ji->method;
1196 if (ji->num_clauses) {
1199 g_assert (ji->clauses);
1201 for (i = 0; i < ji->num_clauses; i++) {
1202 MonoJitExceptionInfo *ei = &ji->clauses [i];
1204 if (ei->try_start <= ip && ip <= (ei->try_end)) {
1206 if (ei->flags == 0 && mono_object_isinst (obj,
1207 mono_class_get (m->klass->image, ei->token_or_filter))) {
1209 ctx->eip = (unsigned long)ei->handler_start;
1210 ctx->ecx = (unsigned long)obj;
1211 restore_context (ctx);
1212 g_assert_not_reached ();
1217 /* no handler found - we need to call all finally handlers */
1218 for (i = 0; i < ji->num_clauses; i++) {
1219 MonoJitExceptionInfo *ei = &ji->clauses [i];
1221 if (ei->try_start <= ip && ip < (ei->try_end) &&
1222 (ei->flags & MONO_EXCEPTION_CLAUSE_FINALLY)) {
1223 call_finally (ctx, (unsigned long)ei->handler_start);
1228 if (mono_object_isinst (obj, mono_defaults.exception_class)) {
1229 char *strace = mono_string_to_utf8 (((MonoException*)obj)->stack_trace);
1232 if (!strcmp (strace, "TODO: implement stack traces")){
1234 strace = g_strdup ("");
1237 tmp = g_strdup_printf ("%sin %s.%s:%s ()\n", strace, m->klass->name_space,
1238 m->klass->name, m->name);
1242 ((MonoException*)obj)->stack_trace = mono_string_new (domain, tmp);
1246 /* continue unwinding */
1248 /* restore caller saved registers */
1249 if (ji->used_regs & X86_ESI_MASK) {
1250 ctx->esi = *((int *)ctx->ebp + offset);
1253 if (ji->used_regs & X86_EDI_MASK) {
1254 ctx->edi = *((int *)ctx->ebp + offset);
1257 if (ji->used_regs & X86_EBX_MASK) {
1258 ctx->ebx = *((int *)ctx->ebp + offset);
1261 ctx->esp = ctx->ebp;
1262 ctx->eip = *((int *)ctx->ebp + 1);
1263 ctx->ebp = *((int *)ctx->ebp);
1265 if (next_bp < (unsigned)mono_end_of_stack)
1266 arch_handle_exception (ctx, obj);
1268 mono_jit_abort (obj);
1271 gpointer *lmf_addr = TlsGetValue (lmf_thread_id);
1275 g_assert (lmf_addr);
1276 lmf = *((MonoLMF **)lmf_addr);
1279 mono_jit_abort (obj);
1283 *lmf_addr = lmf->previous_lmf;
1285 ctx->esi = lmf->esi;
1286 ctx->edi = lmf->edi;
1287 ctx->ebx = lmf->ebx;
1288 ctx->ebp = lmf->ebp;
1289 ctx->eip = lmf->eip;
1290 ctx->esp = (unsigned long)lmf;
1292 if (mono_object_isinst (obj, mono_defaults.exception_class)) {
1293 char *strace = mono_string_to_utf8 (((MonoException*)obj)->stack_trace);
1296 if (!strcmp (strace, "TODO: implement stack traces"))
1297 strace = g_strdup ("");
1299 tmp = g_strdup_printf ("%sin (unmanaged) %s.%s:%s ()\n", strace, m->klass->name_space,
1300 m->klass->name, m->name);
1304 ((MonoException*)obj)->stack_trace = mono_string_new (domain, tmp);
1308 if (ctx->eip < (unsigned)mono_end_of_stack)
1309 arch_handle_exception (ctx, obj);
1311 mono_jit_abort (obj);
1314 g_assert_not_reached ();
1318 throw_exception (unsigned long eax, unsigned long ecx, unsigned long edx, unsigned long ebx,
1319 unsigned long esi, unsigned long edi, unsigned long ebp, MonoObject *exc,
1320 unsigned long eip, unsigned long esp)
1322 struct sigcontext ctx;
1334 arch_handle_exception (&ctx, exc);
1336 g_assert_not_reached ();
1340 * arch_get_throw_exception:
1342 * Returns a function pointer which can be used to raise
1343 * exceptions. The returned function has the following
1344 * signature: void (*func) (MonoException *exc);
1345 * For example to raise an arithmetic exception you can use:
1347 * x86_push_imm (code, mono_get_exception_arithmetic ());
1348 * x86_call_code (code, arch_get_throw_exception ());
1352 arch_get_throw_exception (void)
1354 static guint8 start [24];
1355 static int inited = 0;
1364 x86_push_reg (code, X86_ESP);
1365 x86_push_membase (code, X86_ESP, 4); /* IP */
1366 x86_push_membase (code, X86_ESP, 12); /* exception */
1367 x86_push_reg (code, X86_EBP);
1368 x86_push_reg (code, X86_EDI);
1369 x86_push_reg (code, X86_ESI);
1370 x86_push_reg (code, X86_EBX);
1371 x86_push_reg (code, X86_EDX);
1372 x86_push_reg (code, X86_ECX);
1373 x86_push_reg (code, X86_EAX);
1374 x86_call_code (code, throw_exception);
1375 /* we should never reach this breakpoint */
1376 x86_breakpoint (code);
1378 g_assert ((code - start) < 24);
1383 * arch_get_throw_exception_by_name:
1385 * Returns a function pointer which can be used to raise
1386 * corlib exceptions. The returned function has the following
1387 * signature: void (*func) (char *exc_name);
1388 * For example to raise an arithmetic exception you can use:
1390 * x86_push_imm (code, "ArithmeticException");
1391 * x86_call_code (code, arch_get_throw_exception ());
1395 arch_get_throw_exception_by_name ()
1397 static guint8 start [32];
1398 static int inited = 0;
1407 /* fixme: we do not save EAX, EDX, ECD - unsure if we need that */
1409 x86_push_membase (code, X86_ESP, 4); /* exception name */
1410 x86_push_imm (code, "System");
1411 x86_push_imm (code, mono_defaults.exception_class->image);
1412 x86_call_code (code, mono_exception_from_name);
1413 x86_alu_reg_imm (code, X86_ADD, X86_ESP, 12);
1414 /* save the newly create object (overwrite exception name)*/
1415 x86_mov_membase_reg (code, X86_ESP, 4, X86_EAX, 4);
1416 x86_jump_code (code, arch_get_throw_exception ());
1418 g_assert ((code - start) < 32);