2 * tramp-ppc.c: JIT trampoline code for PowerPC
5 * Dietmar Maurer (dietmar@ximian.com)
6 * Paolo Molaro (lupus@ximian.com)
7 * Carlos Valiente <yo@virutass.net>
8 * Andreas Faerber <andreas.faerber@web.de>
10 * (C) 2001 Ximian, Inc.
11 * (C) 2007-2008 Andreas Faerber
17 #include <mono/metadata/appdomain.h>
18 #include <mono/metadata/marshal.h>
19 #include <mono/metadata/tabledefs.h>
20 #include <mono/arch/ppc/ppc-codegen.h>
26 /* Same as mono_create_ftnptr, but doesn't require a domain */
28 mono_ppc_create_ftnptr (guint8 *code)
30 #ifdef PPC_USES_FUNCTION_DESCRIPTOR
31 MonoPPCFunctionDescriptor *ftnptr = mono_global_codeman_reserve (sizeof (MonoPPCFunctionDescriptor));
45 * Return the instruction to jump from code to target, 0 if not
46 * reachable with a single instruction
49 branch_for_target_reachable (guint8 *branch, guint8 *target)
51 gint diff = target - branch;
52 g_assert ((diff & 3) == 0);
55 return (18 << 26) | (diff);
57 /* diff between 0 and -33554432 */
58 if (diff >= -33554432)
59 return (18 << 26) | (diff & ~0xfc000000);
65 * get_unbox_trampoline:
67 * @addr: pointer to native code for @m
69 * when value type methods are called through the vtable we need to unbox the
70 * this argument. This method returns a pointer to a trampoline which does
71 * unboxing before calling the method
74 mono_arch_get_unbox_trampoline (MonoMethod *m, gpointer addr)
79 MonoDomain *domain = mono_domain_get ();
80 int size = MONO_PPC_32_64_CASE (20, 32) + PPC_FTNPTR_SIZE;
82 addr = mono_get_addr_from_ftnptr (addr);
84 mono_domain_lock (domain);
85 start = code = mono_domain_code_reserve (domain, size);
86 code = mono_ppc_create_pre_code_ftnptr (code);
87 short_branch = branch_for_target_reachable (code + 4, addr);
89 mono_domain_code_commit (domain, code, size, 8);
90 mono_domain_unlock (domain);
93 ppc_addi (code, this_pos, this_pos, sizeof (MonoObject));
94 ppc_emit32 (code, short_branch);
96 ppc_load_ptr (code, ppc_r0, addr);
97 ppc_mtctr (code, ppc_r0);
98 ppc_addi (code, this_pos, this_pos, sizeof (MonoObject));
99 ppc_bcctr (code, 20, 0);
101 mono_arch_flush_icache (start, code - start);
102 g_assert ((code - start) <= size);
103 /*g_print ("unbox trampoline at %d for %s:%s\n", this_pos, m->klass->name, m->name);
104 g_print ("unbox code is at %p for method at %p\n", start, addr);*/
110 * mono_arch_get_static_rgctx_trampoline:
112 * Create a trampoline which sets RGCTX_REG to MRGCTX, then jumps to ADDR.
115 mono_arch_get_static_rgctx_trampoline (MonoMethod *m, MonoMethodRuntimeGenericContext *mrgctx, gpointer addr)
117 guint8 *code, *start, *p;
118 guint8 imm_buf [128];
119 guint32 short_branch;
120 MonoDomain *domain = mono_domain_get ();
122 int size = MONO_PPC_32_64_CASE (24, (PPC_LOAD_SEQUENCE_LENGTH * 2) + 8) + PPC_FTNPTR_SIZE;
124 addr = mono_get_addr_from_ftnptr (addr);
126 /* Compute size of code needed to emit mrgctx */
128 ppc_load_ptr (p, MONO_ARCH_RGCTX_REG, mrgctx);
129 imm_size = p - imm_buf;
131 mono_domain_lock (domain);
132 start = code = mono_domain_code_reserve (domain, size);
133 code = mono_ppc_create_pre_code_ftnptr (code);
134 short_branch = branch_for_target_reachable (code + imm_size, addr);
136 mono_domain_code_commit (domain, code, size, imm_size + 4);
137 mono_domain_unlock (domain);
140 ppc_load_ptr (code, MONO_ARCH_RGCTX_REG, mrgctx);
141 ppc_emit32 (code, short_branch);
143 ppc_load_ptr (code, ppc_r0, addr);
144 ppc_mtctr (code, ppc_r0);
145 ppc_load_ptr (code, MONO_ARCH_RGCTX_REG, mrgctx);
146 ppc_bcctr (code, 20, 0);
148 mono_arch_flush_icache (start, code - start);
149 g_assert ((code - start) <= size);
155 mono_arch_patch_callsite (guint8 *method_start, guint8 *code_ptr, guint8 *addr)
157 guint32 *code = (guint32*)code_ptr;
159 addr = mono_get_addr_from_ftnptr (addr);
161 /* This is the 'blrl' instruction */
165 * Note that methods are called also with the bl opcode.
167 if (((*code) >> 26) == 18) {
168 /*g_print ("direct patching\n");*/
169 ppc_patch ((guint8*)code, addr);
170 mono_arch_flush_icache ((guint8*)code, 4);
175 g_assert (mono_ppc_is_direct_call_sequence (code));
177 ppc_patch ((guint8*)code, addr);
181 mono_arch_patch_plt_entry (guint8 *code, gpointer *got, mgreg_t *regs, guint8 *addr)
183 guint32 ins1, ins2, offset;
185 /* Patch the jump table entry used by the plt entry */
187 /* Should be a lis+ori */
188 ins1 = ((guint32*)code)[0];
189 g_assert (ins1 >> 26 == 15);
190 ins2 = ((guint32*)code)[1];
191 g_assert (ins2 >> 26 == 24);
192 offset = ((ins1 & 0xffff) << 16) | (ins2 & 0xffff);
194 /* Either got or regs is set */
196 got = (gpointer*)(gsize) regs [30];
197 *(guint8**)((guint8*)got + offset) = addr;
201 mono_arch_nullify_class_init_trampoline (guint8 *code, mgreg_t *regs)
203 mono_arch_patch_callsite (NULL, code, mini_get_nullified_class_init_trampoline ());
206 /* Stack size for trampoline function
207 * PPC_MINIMAL_STACK_SIZE + 16 (args + alignment to ppc_magic_trampoline)
208 * + MonoLMF + 14 fp regs + 13 gregs + alignment
210 #define STACK (((PPC_MINIMAL_STACK_SIZE + 4 * sizeof (mgreg_t) + sizeof (MonoLMF) + 14 * sizeof (double) + 31 * sizeof (mgreg_t)) + (MONO_ARCH_FRAME_ALIGNMENT - 1)) & ~(MONO_ARCH_FRAME_ALIGNMENT - 1))
212 /* Method-specific trampoline code fragment size */
213 #define METHOD_TRAMPOLINE_SIZE 64
215 /* Jump-specific trampoline code fragment size */
216 #define JUMP_TRAMPOLINE_SIZE 64
218 #ifdef PPC_USES_FUNCTION_DESCRIPTOR
219 #define PPC_TOC_REG ppc_r2
221 #define PPC_TOC_REG -1
225 * Stack frame description when the generic trampoline is called.
227 * --------------------
229 * -------------------
230 * Saved FP registers 0-13
231 * -------------------
232 * Saved general registers 0-30
233 * -------------------
234 * param area for 3 args to ppc_magic_trampoline
235 * -------------------
237 * -------------------
240 mono_arch_create_generic_trampoline (MonoTrampolineType tramp_type, MonoTrampInfo **info, gboolean aot)
243 guint8 *buf, *code = NULL;
245 gconstpointer tramp_handler;
246 int size = MONO_PPC_32_64_CASE (600, 800);
247 GSList *unwind_ops = NULL;
248 MonoJumpInfo *ji = NULL;
250 /* Now we'll create in 'buf' the PowerPC trampoline code. This
251 is the trampoline code common to all methods */
253 code = buf = mono_global_codeman_reserve (size);
255 ppc_str_update (code, ppc_r1, -STACK, ppc_r1);
257 /* start building the MonoLMF on the stack */
258 offset = STACK - sizeof (double) * MONO_SAVED_FREGS;
259 for (i = 14; i < 32; i++) {
260 ppc_stfd (code, i, offset, ppc_r1);
261 offset += sizeof (double);
264 * now the integer registers.
266 offset = STACK - sizeof (MonoLMF) + G_STRUCT_OFFSET (MonoLMF, iregs);
267 ppc_str_multiple (code, ppc_r13, offset, ppc_r1);
269 /* Now save the rest of the registers below the MonoLMF struct, first 14
270 * fp regs and then the 31 gregs.
272 offset = STACK - sizeof (MonoLMF) - (14 * sizeof (double));
273 for (i = 0; i < 14; i++) {
274 ppc_stfd (code, i, offset, ppc_r1);
275 offset += sizeof (double);
277 #define GREGS_OFFSET (STACK - sizeof (MonoLMF) - (14 * sizeof (double)) - (31 * sizeof (mgreg_t)))
278 offset = GREGS_OFFSET;
279 for (i = 0; i < 31; i++) {
280 ppc_str (code, i, offset, ppc_r1);
281 offset += sizeof (mgreg_t);
284 /* we got here through a jump to the ctr reg, we must save the lr
285 * in the parent frame (we do it here to reduce the size of the
286 * method-specific trampoline)
288 ppc_mflr (code, ppc_r0);
289 ppc_str (code, ppc_r0, STACK + PPC_RET_ADDR_OFFSET, ppc_r1);
291 /* ok, now we can continue with the MonoLMF setup, mostly untouched
292 * from emit_prolog in mini-ppc.c
295 code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_JIT_ICALL_ADDR, "mono_get_lmf_addr");
296 #ifdef PPC_USES_FUNCTION_DESCRIPTOR
297 ppc_ldptr (code, ppc_r2, sizeof (gpointer), ppc_r11);
298 ppc_ldptr (code, ppc_r11, 0, ppc_r11);
300 ppc_mtlr (code, ppc_r11);
303 ppc_load_func (code, ppc_r0, mono_get_lmf_addr);
304 ppc_mtlr (code, ppc_r0);
307 /* we build the MonoLMF structure on the stack - see mini-ppc.h
308 * The pointer to the struct is put in ppc_r11.
310 ppc_addi (code, ppc_r11, ppc_sp, STACK - sizeof (MonoLMF));
311 ppc_stptr (code, ppc_r3, G_STRUCT_OFFSET(MonoLMF, lmf_addr), ppc_r11);
312 /* new_lmf->previous_lmf = *lmf_addr */
313 ppc_ldptr (code, ppc_r0, G_STRUCT_OFFSET(MonoLMF, previous_lmf), ppc_r3);
314 ppc_stptr (code, ppc_r0, G_STRUCT_OFFSET(MonoLMF, previous_lmf), ppc_r11);
315 /* *(lmf_addr) = r11 */
316 ppc_stptr (code, ppc_r11, G_STRUCT_OFFSET(MonoLMF, previous_lmf), ppc_r3);
317 /* save method info (it's stored on the stack, so get it first). */
318 if ((tramp_type == MONO_TRAMPOLINE_JIT) || (tramp_type == MONO_TRAMPOLINE_JUMP)) {
319 ppc_ldr (code, ppc_r0, GREGS_OFFSET, ppc_r1);
320 ppc_stptr (code, ppc_r0, G_STRUCT_OFFSET(MonoLMF, method), ppc_r11);
322 ppc_load (code, ppc_r0, 0);
323 ppc_stptr (code, ppc_r0, G_STRUCT_OFFSET(MonoLMF, method), ppc_r11);
325 /* store the frame pointer of the calling method */
326 ppc_addi (code, ppc_r0, ppc_sp, STACK);
327 ppc_stptr (code, ppc_r0, G_STRUCT_OFFSET(MonoLMF, ebp), ppc_r11);
328 /* save the IP (caller ip) */
329 if (tramp_type == MONO_TRAMPOLINE_JUMP) {
330 ppc_li (code, ppc_r0, 0);
332 ppc_ldr (code, ppc_r0, STACK + PPC_RET_ADDR_OFFSET, ppc_r1);
334 ppc_stptr (code, ppc_r0, G_STRUCT_OFFSET(MonoLMF, eip), ppc_r11);
337 * Now we're ready to call trampoline (mgreg_t *regs, guint8 *code, gpointer value, guint8 *tramp)
338 * Note that the last argument is unused.
340 /* Arg 1: a pointer to the registers */
341 ppc_addi (code, ppc_r3, ppc_r1, GREGS_OFFSET);
343 /* Arg 2: code (next address to the instruction that called us) */
344 if (tramp_type == MONO_TRAMPOLINE_JUMP)
345 ppc_li (code, ppc_r4, 0);
347 ppc_ldr (code, ppc_r4, STACK + PPC_RET_ADDR_OFFSET, ppc_r1);
349 /* Arg 3: trampoline argument */
350 if (tramp_type == MONO_TRAMPOLINE_GENERIC_CLASS_INIT)
351 ppc_ldr (code, ppc_r5, GREGS_OFFSET + MONO_ARCH_VTABLE_REG * sizeof (mgreg_t), ppc_r1);
353 ppc_ldr (code, ppc_r5, GREGS_OFFSET, ppc_r1);
356 code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_JIT_ICALL_ADDR, g_strdup_printf ("trampoline_func_%d", tramp_type));
357 #ifdef PPC_USES_FUNCTION_DESCRIPTOR
358 ppc_ldptr (code, ppc_r2, sizeof (gpointer), ppc_r11);
359 ppc_ldptr (code, ppc_r11, 0, ppc_r11);
361 ppc_mtlr (code, ppc_r11);
364 tramp_handler = mono_get_trampoline_func (tramp_type);
365 ppc_load_func (code, ppc_r0, tramp_handler);
366 ppc_mtlr (code, ppc_r0);
370 /* OK, code address is now on r3. Move it to the counter reg
371 * so it will be ready for the final jump: this is safe since we
372 * won't do any more calls.
374 if (!MONO_TRAMPOLINE_TYPE_MUST_RETURN (tramp_type)) {
375 #ifdef PPC_USES_FUNCTION_DESCRIPTOR
376 ppc_ldptr (code, ppc_r2, sizeof (gpointer), ppc_r3);
377 ppc_ldptr (code, ppc_r3, 0, ppc_r3);
379 ppc_mtctr (code, ppc_r3);
383 * Now we restore the MonoLMF (see emit_epilogue in mini-ppc.c)
384 * and the rest of the registers, so the method called will see
385 * the same state as before we executed.
386 * The pointer to MonoLMF is in ppc_r11.
388 ppc_addi (code, ppc_r11, ppc_r1, STACK - sizeof (MonoLMF));
389 /* r5 = previous_lmf */
390 ppc_ldptr (code, ppc_r5, G_STRUCT_OFFSET(MonoLMF, previous_lmf), ppc_r11);
392 ppc_ldptr (code, ppc_r6, G_STRUCT_OFFSET(MonoLMF, lmf_addr), ppc_r11);
393 /* *(lmf_addr) = previous_lmf */
394 ppc_stptr (code, ppc_r5, G_STRUCT_OFFSET(MonoLMF, previous_lmf), ppc_r6);
396 ppc_ldr_multiple (code, ppc_r13, G_STRUCT_OFFSET(MonoLMF, iregs), ppc_r11);
398 for (i = 14; i < 32; i++)
399 ppc_lfd (code, i, G_STRUCT_OFFSET(MonoLMF, fregs) + ((i-14) * sizeof (gdouble)), ppc_r11);
401 /* restore the volatile registers, we skip r1, of course */
402 offset = STACK - sizeof (MonoLMF) - (14 * sizeof (double));
403 for (i = 0; i < 14; i++) {
404 ppc_lfd (code, i, offset, ppc_r1);
405 offset += sizeof (double);
407 offset = STACK - sizeof (MonoLMF) - (14 * sizeof (double)) - (31 * sizeof (mgreg_t));
408 ppc_ldr (code, ppc_r0, offset, ppc_r1);
409 offset += 2 * sizeof (mgreg_t);
410 for (i = 2; i < 13; i++) {
411 if (i != PPC_TOC_REG && (i != 3 || tramp_type != MONO_TRAMPOLINE_RGCTX_LAZY_FETCH))
412 ppc_ldr (code, i, offset, ppc_r1);
413 offset += sizeof (mgreg_t);
416 /* Non-standard function epilogue. Instead of doing a proper
417 * return, we just jump to the compiled code.
419 /* Restore stack pointer and LR and jump to the code */
420 ppc_ldr (code, ppc_r1, 0, ppc_r1);
421 ppc_ldr (code, ppc_r11, PPC_RET_ADDR_OFFSET, ppc_r1);
422 ppc_mtlr (code, ppc_r11);
423 if (MONO_TRAMPOLINE_TYPE_MUST_RETURN (tramp_type))
426 ppc_bcctr (code, 20, 0);
428 /* Flush instruction cache, since we've generated code */
429 mono_arch_flush_icache (buf, code - buf);
432 g_assert ((code - buf) <= size);
435 tramp_name = mono_get_generic_trampoline_name (tramp_type);
436 *info = mono_tramp_info_create (tramp_name, buf, code - buf, ji, unwind_ops);
443 #define TRAMPOLINE_SIZE (MONO_PPC_32_64_CASE (24, (5+5+1+1)*4))
445 mono_arch_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
447 guint8 *code, *buf, *tramp;
448 guint32 short_branch;
450 tramp = mono_get_trampoline_code (tramp_type);
452 mono_domain_lock (domain);
453 code = buf = mono_domain_code_reserve_align (domain, TRAMPOLINE_SIZE, 4);
454 short_branch = branch_for_target_reachable (code + MONO_PPC_32_64_CASE (8, 5*4), tramp);
455 #ifdef __mono_ppc64__
456 /* FIXME: make shorter if possible */
459 mono_domain_code_commit (domain, code, TRAMPOLINE_SIZE, 12);
461 mono_domain_unlock (domain);
464 ppc_load_sequence (code, ppc_r0, (mgreg_t)(gsize) arg1);
465 ppc_emit32 (code, short_branch);
467 /* Prepare the jump to the generic trampoline code.*/
468 ppc_load_ptr (code, ppc_r0, tramp);
469 ppc_mtctr (code, ppc_r0);
471 /* And finally put 'arg1' in r0 and fly! */
472 ppc_load_ptr (code, ppc_r0, arg1);
473 ppc_bcctr (code, 20, 0);
476 /* Flush instruction cache, since we've generated code */
477 mono_arch_flush_icache (buf, code - buf);
479 g_assert ((code - buf) <= TRAMPOLINE_SIZE);
482 *code_len = code - buf;
488 emit_trampoline_jump (guint8 *code, guint8 *tramp)
490 guint32 short_branch = branch_for_target_reachable (code, tramp);
492 /* FIXME: we can save a few bytes here by committing if the
493 short branch is possible */
495 ppc_emit32 (code, short_branch);
497 ppc_load_ptr (code, ppc_r0, tramp);
498 ppc_mtctr (code, ppc_r0);
499 ppc_bcctr (code, 20, 0);
506 mono_arch_create_rgctx_lazy_fetch_trampoline (guint32 slot, MonoTrampInfo **info, gboolean aot)
508 #ifdef MONO_ARCH_VTABLE_REG
511 guint8 **rgctx_null_jumps;
516 MonoJumpInfo *ji = NULL;
517 GSList *unwind_ops = NULL;
519 mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
520 index = MONO_RGCTX_SLOT_INDEX (slot);
522 index += MONO_SIZEOF_METHOD_RUNTIME_GENERIC_CONTEXT / sizeof (gpointer);
523 for (depth = 0; ; ++depth) {
524 int size = mono_class_rgctx_get_array_size (depth, mrgctx);
526 if (index < size - 1)
531 tramp_size = MONO_PPC_32_64_CASE (40, 52) + 12 * depth;
539 code = buf = mono_global_codeman_reserve (tramp_size);
541 rgctx_null_jumps = g_malloc (sizeof (guint8*) * (depth + 2));
545 ppc_mr (code, ppc_r4, PPC_FIRST_ARG_REG);
547 /* load rgctx ptr from vtable */
548 ppc_ldptr (code, ppc_r4, G_STRUCT_OFFSET (MonoVTable, runtime_generic_context), PPC_FIRST_ARG_REG);
549 /* is the rgctx ptr null? */
550 ppc_compare_reg_imm (code, 0, ppc_r4, 0);
551 /* if yes, jump to actual trampoline */
552 rgctx_null_jumps [0] = code;
553 ppc_bc (code, PPC_BR_TRUE, PPC_BR_EQ, 0);
556 for (i = 0; i < depth; ++i) {
557 /* load ptr to next array */
558 if (mrgctx && i == 0)
559 ppc_ldptr (code, ppc_r4, MONO_SIZEOF_METHOD_RUNTIME_GENERIC_CONTEXT, ppc_r4);
561 ppc_ldptr (code, ppc_r4, 0, ppc_r4);
562 /* is the ptr null? */
563 ppc_compare_reg_imm (code, 0, ppc_r4, 0);
564 /* if yes, jump to actual trampoline */
565 rgctx_null_jumps [i + 1] = code;
566 ppc_bc (code, PPC_BR_TRUE, PPC_BR_EQ, 0);
570 ppc_ldptr (code, ppc_r4, sizeof (gpointer) * (index + 1), ppc_r4);
571 /* is the slot null? */
572 ppc_compare_reg_imm (code, 0, ppc_r4, 0);
573 /* if yes, jump to actual trampoline */
574 rgctx_null_jumps [depth + 1] = code;
575 ppc_bc (code, PPC_BR_TRUE, PPC_BR_EQ, 0);
576 /* otherwise return r4 */
577 /* FIXME: if we use r3 as the work register we can avoid this copy */
578 ppc_mr (code, ppc_r3, ppc_r4);
581 for (i = mrgctx ? 1 : 0; i <= depth + 1; ++i)
582 ppc_patch (rgctx_null_jumps [i], code);
584 g_free (rgctx_null_jumps);
586 /* move the rgctx pointer to the VTABLE register */
587 ppc_mr (code, MONO_ARCH_VTABLE_REG, ppc_r3);
590 code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_JIT_ICALL_ADDR, g_strdup_printf ("specific_trampoline_lazy_fetch_%u", slot));
591 /* Branch to the trampoline */
592 #ifdef PPC_USES_FUNCTION_DESCRIPTOR
593 ppc_ldptr (code, ppc_r11, 0, ppc_r11);
595 ppc_mtctr (code, ppc_r11);
596 ppc_bcctr (code, PPC_BR_ALWAYS, 0);
598 tramp = mono_arch_create_specific_trampoline (GUINT_TO_POINTER (slot),
599 MONO_TRAMPOLINE_RGCTX_LAZY_FETCH, mono_get_root_domain (), NULL);
601 /* jump to the actual trampoline */
602 code = emit_trampoline_jump (code, tramp);
605 mono_arch_flush_icache (buf, code - buf);
607 g_assert (code - buf <= tramp_size);
610 char *name = mono_get_rgctx_fetch_trampoline_name (slot);
611 *info = mono_tramp_info_create (name, buf, code - buf, ji, unwind_ops);
617 g_assert_not_reached ();
622 mono_arch_create_generic_class_init_trampoline (MonoTrampInfo **info, gboolean aot)
626 static int byte_offset = -1;
627 static guint8 bitmask;
630 GSList *unwind_ops = NULL;
631 MonoJumpInfo *ji = NULL;
633 tramp_size = MONO_PPC_32_64_CASE (32, 44);
637 code = buf = mono_global_codeman_reserve (tramp_size);
640 mono_marshal_find_bitfield_offset (MonoVTable, initialized, &byte_offset, &bitmask);
642 ppc_lbz (code, ppc_r4, byte_offset, MONO_ARCH_VTABLE_REG);
643 ppc_andid (code, ppc_r4, ppc_r4, bitmask);
645 ppc_bc (code, PPC_BR_TRUE, PPC_BR_EQ, 0);
649 ppc_patch (jump, code);
652 code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_JIT_ICALL_ADDR, "specific_trampoline_generic_class_init");
653 /* Branch to the trampoline */
654 #ifdef PPC_USES_FUNCTION_DESCRIPTOR
655 ppc_ldptr (code, ppc_r11, 0, ppc_r11);
657 ppc_mtctr (code, ppc_r11);
658 ppc_bcctr (code, PPC_BR_ALWAYS, 0);
660 tramp = mono_arch_create_specific_trampoline (NULL, MONO_TRAMPOLINE_GENERIC_CLASS_INIT,
661 mono_get_root_domain (), NULL);
663 /* jump to the actual trampoline */
664 code = emit_trampoline_jump (code, tramp);
667 mono_arch_flush_icache (buf, code - buf);
669 g_assert (code - buf <= tramp_size);
672 *info = mono_tramp_info_create ("generic_class_init_trampoline", buf, code - buf, ji, unwind_ops);
678 mono_arch_get_nullified_class_init_trampoline (MonoTrampInfo **info)
681 guint32 tramp_size = 64;
683 code = buf = mono_global_codeman_reserve (tramp_size);
686 mono_arch_flush_icache (buf, code - buf);
688 g_assert (code - buf <= tramp_size);
691 *info = mono_tramp_info_create ("nullified_class_init_trampoline", buf, code - buf, NULL, NULL);
697 mono_arch_get_call_target (guint8 *code)
700 guint32 ins = ((guint32*)(gpointer)code) [-1];
702 if ((ins >> 26 == 18) && ((ins & 1) == 1) && ((ins & 2) == 0)) {
703 gint32 disp = (((gint32)ins) >> 2) & 0xffffff;
704 guint8 *target = code - 4 + (disp * 4);
713 mono_arch_get_plt_info_offset (guint8 *plt_entry, mgreg_t *regs, guint8 *code)
715 #ifdef PPC_USES_FUNCTION_DESCRIPTOR
716 return ((guint32*)plt_entry) [8];
718 return ((guint32*)plt_entry) [6];