3 * JIT trampoline code for ARM64
5 * Copyright 2013 Xamarin Inc
7 * Based on tramp-arm.c:
10 * Paolo Molaro (lupus@ximian.com)
12 * (C) 2001-2003 Ximian, Inc.
13 * Copyright 2003-2011 Novell Inc
14 * Copyright 2011 Xamarin Inc
15 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
19 #include "debugger-agent.h"
21 #include <mono/arch/arm64/arm64-codegen.h>
22 #include <mono/metadata/abi-details.h>
24 #ifdef ENABLE_INTERPRETER
25 #include "interp/interp.h"
29 #define ALIGN_TO(val,align) ((((guint64)val) + ((align) - 1)) & ~((align) - 1))
32 mono_arch_patch_callsite (guint8 *method_start, guint8 *code_ptr, guint8 *addr)
34 mono_arm_patch (code_ptr - 4, addr, MONO_R_ARM64_BL);
35 mono_arch_flush_icache (code_ptr - 4, 4);
39 mono_arch_patch_plt_entry (guint8 *code, gpointer *got, mgreg_t *regs, guint8 *addr)
46 * Decode the address loaded by the PLT entry emitted by arch_emit_plt_entry () in
51 ins = ((guint32*)code) [0];
52 g_assert (((ins >> 24) & 0x1f) == 0x10);
53 disp = (((ins >> 5) & 0x7ffff) << 2) | ((ins >> 29) & 0x3);
54 /* FIXME: disp is signed */
55 g_assert ((disp >> 20) == 0);
57 slot_addr = ((guint64)code + (disp << 12)) & ~0xfff;
59 /* add x16, x16, :lo12:got */
60 ins = ((guint32*)code) [1];
61 g_assert (((ins >> 22) & 0x3) == 0);
62 slot_addr += (ins >> 10) & 0xfff;
64 /* ldr x16, [x16, <offset>] */
65 ins = ((guint32*)code) [2];
66 g_assert (((ins >> 24) & 0x3f) == 0x39);
67 slot_addr += ((ins >> 10) & 0xfff) * 8;
69 g_assert (*(guint64*)slot_addr);
70 *(gpointer*)slot_addr = addr;
74 mono_arch_get_call_target (guint8 *code)
81 imm = *(guint32*)code;
82 /* Should be a b/bl */
83 g_assert (((imm >> 26) & 0x7) == 0x5);
85 disp = (imm & 0x3ffffff);
86 if ((disp >> 25) != 0)
87 /* Negative, sing extend to 32 bits */
88 disp = disp | 0xfc000000;
90 return code + (disp * 4);
94 mono_arch_get_plt_info_offset (guint8 *plt_entry, mgreg_t *regs, guint8 *code)
96 /* The offset is stored as the 5th word of the plt entry */
97 return ((guint32*)plt_entry) [4];
103 mono_arch_create_generic_trampoline (MonoTrampolineType tramp_type, MonoTrampInfo **info, gboolean aot)
105 guint8 *code, *buf, *tramp, *labels [16];
107 int frame_size, offset, gregs_offset, num_fregs, fregs_offset, arg_offset, lmf_offset, res_offset;
108 guint64 gregs_regset;
109 GSList *unwind_ops = NULL;
110 MonoJumpInfo *ji = NULL;
114 buf = code = mono_global_codeman_reserve (buf_len);
117 * We are getting called by a specific trampoline, ip1 contains the trampoline argument.
120 /* Compute stack frame size and offsets */
125 gregs_offset = offset;
128 // FIXME: Save 128 bits
129 /* Only have to save the argument regs */
131 fregs_offset = offset;
132 offset += num_fregs * 8;
141 offset += sizeof (MonoLMF);
143 frame_size = ALIGN_TO (offset, MONO_ARCH_FRAME_ALIGNMENT);
145 /* Setup stack frame */
148 arm_subx_imm (code, ARMREG_SP, ARMREG_SP, 256);
151 arm_subx_imm (code, ARMREG_SP, ARMREG_SP, imm);
152 arm_stpx (code, ARMREG_FP, ARMREG_LR, ARMREG_SP, 0);
153 arm_movspx (code, ARMREG_FP, ARMREG_SP);
156 // FIXME: Optimize this
157 gregs_regset = ~((1 << ARMREG_FP) | (1 << ARMREG_SP));
158 code = mono_arm_emit_store_regarray (code, gregs_regset, ARMREG_FP, gregs_offset);
160 for (i = 0; i < num_fregs; ++i)
161 arm_strfpx (code, i, ARMREG_FP, fregs_offset + (i * 8));
162 /* Save trampoline arg */
163 arm_strx (code, ARMREG_IP1, ARMREG_FP, arg_offset);
166 arm_addx_imm (code, ARMREG_IP0, ARMREG_FP, lmf_offset);
167 code = mono_arm_emit_store_regset (code, MONO_ARCH_LMF_REGS, ARMREG_IP0, MONO_STRUCT_OFFSET (MonoLMF, gregs));
169 arm_ldrx (code, ARMREG_IP1, ARMREG_FP, 0);
170 arm_strx (code, ARMREG_IP1, ARMREG_IP0, MONO_STRUCT_OFFSET (MonoLMF, gregs) + (MONO_ARCH_LMF_REG_FP * 8));
172 arm_movx (code, ARMREG_IP1, ARMREG_FP);
175 arm_addx_imm (code, ARMREG_IP1, ARMREG_IP1, 256);
178 arm_addx_imm (code, ARMREG_IP1, ARMREG_IP1, imm);
179 arm_strx (code, ARMREG_IP1, ARMREG_IP0, MONO_STRUCT_OFFSET (MonoLMF, gregs) + (MONO_ARCH_LMF_REG_SP * 8));
181 if (tramp_type == MONO_TRAMPOLINE_JUMP)
182 arm_movx (code, ARMREG_LR, ARMREG_RZR);
184 arm_ldrx (code, ARMREG_LR, ARMREG_FP, 8);
185 arm_strx (code, ARMREG_LR, ARMREG_IP0, MONO_STRUCT_OFFSET (MonoLMF, pc));
188 /* Similar to emit_save_lmf () */
190 code = mono_arm_emit_aotconst (&ji, code, buf, ARMREG_IP0, MONO_PATCH_INFO_JIT_ICALL_ADDR, "mono_get_lmf_addr");
192 tramp = (guint8*)mono_get_lmf_addr;
193 code = mono_arm_emit_imm64 (code, ARMREG_IP0, (guint64)tramp);
195 arm_blrx (code, ARMREG_IP0);
196 /* r0 contains the address of the tls slot holding the current lmf */
198 arm_addx_imm (code, ARMREG_IP0, ARMREG_FP, lmf_offset);
199 /* lmf->lmf_addr = lmf_addr */
200 arm_strx (code, ARMREG_R0, ARMREG_IP0, MONO_STRUCT_OFFSET (MonoLMF, lmf_addr));
201 /* lmf->previous_lmf = *lmf_addr */
202 arm_ldrx (code, ARMREG_IP1, ARMREG_R0, 0);
203 arm_strx (code, ARMREG_IP1, ARMREG_IP0, MONO_STRUCT_OFFSET (MonoLMF, previous_lmf));
204 /* *lmf_addr = lmf */
205 arm_strx (code, ARMREG_IP0, ARMREG_R0, 0);
207 /* Call the C trampoline function */
209 arm_addx_imm (code, ARMREG_R0, ARMREG_FP, gregs_offset);
211 if (tramp_type == MONO_TRAMPOLINE_JUMP)
212 arm_movx (code, ARMREG_R1, ARMREG_RZR);
214 arm_ldrx (code, ARMREG_R1, ARMREG_FP, gregs_offset + (ARMREG_LR * 8));
216 if (MONO_TRAMPOLINE_TYPE_HAS_ARG (tramp_type))
218 arm_ldrx (code, ARMREG_R2, ARMREG_FP, gregs_offset + (ARMREG_R0 * 8));
220 arm_ldrx (code, ARMREG_R2, ARMREG_FP, arg_offset);
221 /* Arg 4 = trampoline addr */
222 arm_movx (code, ARMREG_R3, ARMREG_RZR);
225 char *icall_name = g_strdup_printf ("trampoline_func_%d", tramp_type);
226 code = mono_arm_emit_aotconst (&ji, code, buf, ARMREG_IP0, MONO_PATCH_INFO_JIT_ICALL_ADDR, icall_name);
228 tramp = (guint8*)mono_get_trampoline_func (tramp_type);
229 code = mono_arm_emit_imm64 (code, ARMREG_IP0, (guint64)tramp);
231 arm_blrx (code, ARMREG_IP0);
233 /* Save the result */
234 arm_strx (code, ARMREG_R0, ARMREG_FP, res_offset);
237 /* Similar to emit_restore_lmf () */
238 /* Clobbers ip0/ip1 */
240 arm_addx_imm (code, ARMREG_IP0, ARMREG_FP, lmf_offset);
241 /* ip1 = lmf->previous_lmf */
242 arm_ldrx (code, ARMREG_IP1, ARMREG_IP0, MONO_STRUCT_OFFSET (MonoLMF, previous_lmf));
243 /* ip0 = lmf->lmf_addr */
244 arm_ldrx (code, ARMREG_IP0, ARMREG_IP0, MONO_STRUCT_OFFSET (MonoLMF, lmf_addr));
245 /* *lmf_addr = previous_lmf */
246 arm_strx (code, ARMREG_IP1, ARMREG_IP0, 0);
248 /* Check for thread interruption */
249 /* This is not perf critical code so no need to check the interrupt flag */
251 code = mono_arm_emit_aotconst (&ji, code, buf, ARMREG_IP0, MONO_PATCH_INFO_JIT_ICALL_ADDR, "mono_thread_force_interruption_checkpoint_noraise");
253 code = mono_arm_emit_imm64 (code, ARMREG_IP0, (guint64)mono_thread_force_interruption_checkpoint_noraise);
255 arm_blrx (code, ARMREG_IP0);
256 /* Check whenever there is an exception to be thrown */
258 arm_cbnzx (code, ARMREG_R0, 0);
263 /* Only have to load the argument regs (r0..r8) and the rgctx reg */
264 code = mono_arm_emit_load_regarray (code, 0x1ff | (1 << ARMREG_LR) | (1 << MONO_ARCH_RGCTX_REG), ARMREG_FP, gregs_offset);
266 for (i = 0; i < num_fregs; ++i)
267 arm_ldrfpx (code, i, ARMREG_FP, fregs_offset + (i * 8));
269 /* Load the result */
270 arm_ldrx (code, ARMREG_IP1, ARMREG_FP, res_offset);
272 /* These trampolines return a value */
273 if (tramp_type == MONO_TRAMPOLINE_RGCTX_LAZY_FETCH)
274 arm_movx (code, ARMREG_R0, ARMREG_IP1);
277 code = mono_arm_emit_destroy_frame (code, frame_size, ((1 << ARMREG_IP0)));
279 if (tramp_type == MONO_TRAMPOLINE_RGCTX_LAZY_FETCH)
280 arm_retx (code, ARMREG_LR);
282 arm_brx (code, ARMREG_IP1);
285 mono_arm_patch (labels [0], code, MONO_R_ARM64_CBZ);
288 * We have an exception we want to throw in the caller's frame, so pop
289 * the trampoline frame and throw from the caller.
291 code = mono_arm_emit_destroy_frame (code, frame_size, ((1 << ARMREG_IP0)));
292 /* We are in the parent frame, the exception is in x0 */
294 * EH is initialized after trampolines, so get the address of the variable
295 * which contains throw_exception, and load it from there.
298 /* Not really a jit icall */
299 code = mono_arm_emit_aotconst (&ji, code, buf, ARMREG_IP0, MONO_PATCH_INFO_JIT_ICALL_ADDR, "throw_exception_addr");
301 code = mono_arm_emit_imm64 (code, ARMREG_IP0, (guint64)mono_get_throw_exception_addr ());
303 arm_ldrx (code, ARMREG_IP0, ARMREG_IP0, 0);
304 /* lr contains the return address, the trampoline will use it as the throw site */
305 arm_brx (code, ARMREG_IP0);
307 g_assert ((code - buf) < buf_len);
308 mono_arch_flush_icache (buf, code - buf);
311 tramp_name = mono_get_generic_trampoline_name (tramp_type);
312 *info = mono_tramp_info_create (tramp_name, buf, code - buf, ji, unwind_ops);
320 mono_arch_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
322 guint8 *code, *buf, *tramp;
326 * Return a trampoline which calls generic trampoline TRAMP_TYPE passing in ARG1.
327 * Pass the argument in ip1, clobbering ip0.
329 tramp = mono_get_trampoline_code (tramp_type);
331 buf = code = mono_global_codeman_reserve (buf_len);
333 code = mono_arm_emit_imm64 (code, ARMREG_IP1, (guint64)arg1);
334 code = mono_arm_emit_imm64 (code, ARMREG_IP0, (guint64)tramp);
336 arm_brx (code, ARMREG_IP0);
338 g_assert ((code - buf) < buf_len);
339 mono_arch_flush_icache (buf, code - buf);
341 *code_len = code - buf;
347 mono_arch_get_unbox_trampoline (MonoMethod *m, gpointer addr)
349 guint8 *code, *start;
351 MonoDomain *domain = mono_domain_get ();
353 start = code = mono_domain_code_reserve (domain, size);
354 code = mono_arm_emit_imm64 (code, ARMREG_IP0, (guint64)addr);
355 arm_addx_imm (code, ARMREG_R0, ARMREG_R0, sizeof (MonoObject));
356 arm_brx (code, ARMREG_IP0);
358 g_assert ((code - start) <= size);
359 mono_arch_flush_icache (start, code - start);
364 mono_arch_get_static_rgctx_trampoline (gpointer arg, gpointer addr)
366 guint8 *code, *start;
367 guint32 buf_len = 32;
368 MonoDomain *domain = mono_domain_get ();
370 start = code = mono_domain_code_reserve (domain, buf_len);
371 code = mono_arm_emit_imm64 (code, MONO_ARCH_RGCTX_REG, (guint64)arg);
372 code = mono_arm_emit_imm64 (code, ARMREG_IP0, (guint64)addr);
373 arm_brx (code, ARMREG_IP0);
375 g_assert ((code - start) <= buf_len);
377 mono_arch_flush_icache (start, code - start);
383 mono_arch_create_rgctx_lazy_fetch_trampoline (guint32 slot, MonoTrampInfo **info, gboolean aot)
387 int i, depth, index, njumps;
389 guint8 **rgctx_null_jumps;
390 MonoJumpInfo *ji = NULL;
391 GSList *unwind_ops = NULL;
395 is_mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
396 index = MONO_RGCTX_SLOT_INDEX (slot);
398 index += MONO_SIZEOF_METHOD_RUNTIME_GENERIC_CONTEXT / sizeof (gpointer);
399 for (depth = 0; ; ++depth) {
400 int size = mono_class_rgctx_get_array_size (depth, is_mrgctx);
402 if (index < size - 1)
407 buf_size = 64 + 16 * depth;
408 code = buf = mono_global_codeman_reserve (buf_size);
410 rgctx_null_jumps = g_malloc0 (sizeof (guint8*) * (depth + 2));
413 /* The vtable/mrgtx is in R0 */
414 g_assert (MONO_ARCH_VTABLE_REG == ARMREG_R0);
418 arm_movx (code, ARMREG_IP1, ARMREG_R0);
420 /* load rgctx ptr from vtable */
421 code = mono_arm_emit_ldrx (code, ARMREG_IP1, ARMREG_R0, MONO_STRUCT_OFFSET (MonoVTable, runtime_generic_context));
422 /* is the rgctx ptr null? */
423 /* if yes, jump to actual trampoline */
424 rgctx_null_jumps [njumps ++] = code;
425 arm_cbzx (code, ARMREG_IP1, 0);
428 for (i = 0; i < depth; ++i) {
429 /* load ptr to next array */
430 if (is_mrgctx && i == 0) {
431 code = mono_arm_emit_ldrx (code, ARMREG_IP1, ARMREG_IP1, MONO_SIZEOF_METHOD_RUNTIME_GENERIC_CONTEXT);
433 code = mono_arm_emit_ldrx (code, ARMREG_IP1, ARMREG_IP1, 0);
435 /* is the ptr null? */
436 /* if yes, jump to actual trampoline */
437 rgctx_null_jumps [njumps ++] = code;
438 arm_cbzx (code, ARMREG_IP1, 0);
442 code = mono_arm_emit_ldrx (code, ARMREG_IP1, ARMREG_IP1, sizeof (gpointer) * (index + 1));
443 /* is the slot null? */
444 /* if yes, jump to actual trampoline */
445 rgctx_null_jumps [njumps ++] = code;
446 arm_cbzx (code, ARMREG_IP1, 0);
447 /* otherwise return, result is in IP1 */
448 arm_movx (code, ARMREG_R0, ARMREG_IP1);
449 arm_brx (code, ARMREG_LR);
451 g_assert (njumps <= depth + 2);
452 for (i = 0; i < njumps; ++i)
453 mono_arm_patch (rgctx_null_jumps [i], code, MONO_R_ARM64_CBZ);
455 g_free (rgctx_null_jumps);
459 /* Call mono_rgctx_lazy_fetch_trampoline (), passing in the slot as argument */
460 /* The vtable/mrgctx is still in R0 */
462 code = mono_arm_emit_aotconst (&ji, code, buf, ARMREG_IP0, MONO_PATCH_INFO_JIT_ICALL_ADDR, g_strdup_printf ("specific_trampoline_lazy_fetch_%u", slot));
464 tramp = mono_arch_create_specific_trampoline (GUINT_TO_POINTER (slot), MONO_TRAMPOLINE_RGCTX_LAZY_FETCH, mono_get_root_domain (), &code_len);
465 code = mono_arm_emit_imm64 (code, ARMREG_IP0, (guint64)tramp);
467 arm_brx (code, ARMREG_IP0);
469 mono_arch_flush_icache (buf, code - buf);
471 g_assert (code - buf <= buf_size);
474 char *name = mono_get_rgctx_fetch_trampoline_name (slot);
475 *info = mono_tramp_info_create (name, buf, code - buf, ji, unwind_ops);
483 mono_arch_create_general_rgctx_lazy_fetch_trampoline (MonoTrampInfo **info, gboolean aot)
487 MonoJumpInfo *ji = NULL;
488 GSList *unwind_ops = NULL;
494 code = buf = mono_global_codeman_reserve (tramp_size);
496 mono_add_unwind_op_def_cfa (unwind_ops, code, buf, ARMREG_SP, 0);
498 // FIXME: Currently, we always go to the slow path.
499 /* Load trampoline addr */
500 arm_ldrx (code, ARMREG_IP0, MONO_ARCH_RGCTX_REG, 8);
501 /* The vtable/mrgctx is in R0 */
502 g_assert (MONO_ARCH_VTABLE_REG == ARMREG_R0);
503 arm_brx (code, ARMREG_IP0);
505 mono_arch_flush_icache (buf, code - buf);
507 g_assert (code - buf <= tramp_size);
510 *info = mono_tramp_info_create ("rgctx_fetch_trampoline_general", buf, code - buf, ji, unwind_ops);
516 * mono_arch_create_sdb_trampoline:
518 * Return a trampoline which captures the current context, passes it to
519 * debugger_agent_single_step_from_context ()/debugger_agent_breakpoint_from_context (),
520 * then restores the (potentially changed) context.
523 mono_arch_create_sdb_trampoline (gboolean single_step, MonoTrampInfo **info, gboolean aot)
525 int tramp_size = 512;
526 int offset, imm, frame_size, ctx_offset;
527 guint64 gregs_regset;
529 GSList *unwind_ops = NULL;
530 MonoJumpInfo *ji = NULL;
532 code = buf = mono_global_codeman_reserve (tramp_size);
534 /* Compute stack frame size and offsets */
540 offset += sizeof (MonoContext);
541 offset = ALIGN_TO (offset, MONO_ARCH_FRAME_ALIGNMENT);
544 // FIXME: Unwind info
546 /* Setup stack frame */
549 arm_subx_imm (code, ARMREG_SP, ARMREG_SP, 256);
552 arm_subx_imm (code, ARMREG_SP, ARMREG_SP, imm);
553 arm_stpx (code, ARMREG_FP, ARMREG_LR, ARMREG_SP, 0);
554 arm_movspx (code, ARMREG_FP, ARMREG_SP);
556 /* Initialize a MonoContext structure on the stack */
557 /* No need to save fregs */
558 gregs_regset = ~((1 << ARMREG_FP) | (1 << ARMREG_SP));
559 code = mono_arm_emit_store_regarray (code, gregs_regset, ARMREG_FP, ctx_offset + G_STRUCT_OFFSET (MonoContext, regs));
561 arm_ldrx (code, ARMREG_IP1, ARMREG_FP, 0);
562 arm_strx (code, ARMREG_IP1, ARMREG_FP, ctx_offset + G_STRUCT_OFFSET (MonoContext, regs) + (ARMREG_FP * 8));
564 arm_movx (code, ARMREG_IP1, ARMREG_FP);
567 arm_addx_imm (code, ARMREG_IP1, ARMREG_IP1, 256);
570 arm_addx_imm (code, ARMREG_IP1, ARMREG_IP1, imm);
571 arm_strx (code, ARMREG_IP1, ARMREG_FP, ctx_offset + G_STRUCT_OFFSET (MonoContext, regs) + (ARMREG_SP * 8));
573 arm_ldrx (code, ARMREG_IP1, ARMREG_FP, 8);
574 arm_strx (code, ARMREG_IP1, ARMREG_FP, ctx_offset + G_STRUCT_OFFSET (MonoContext, pc));
576 /* Call the single step/breakpoint function in sdb */
578 arm_addx_imm (code, ARMREG_R0, ARMREG_FP, ctx_offset);
581 code = mono_arm_emit_aotconst (&ji, code, buf, ARMREG_IP0, MONO_PATCH_INFO_JIT_ICALL_ADDR, "debugger_agent_single_step_from_context");
583 code = mono_arm_emit_aotconst (&ji, code, buf, ARMREG_IP0, MONO_PATCH_INFO_JIT_ICALL_ADDR, "debugger_agent_breakpoint_from_context");
585 gpointer addr = single_step ? debugger_agent_single_step_from_context : debugger_agent_breakpoint_from_context;
587 code = mono_arm_emit_imm64 (code, ARMREG_IP0, (guint64)addr);
589 arm_blrx (code, ARMREG_IP0);
592 /* Save fp/pc into the frame block */
593 arm_ldrx (code, ARMREG_IP0, ARMREG_FP, ctx_offset + G_STRUCT_OFFSET (MonoContext, regs) + (ARMREG_FP * 8));
594 arm_strx (code, ARMREG_IP0, ARMREG_FP, 0);
595 arm_ldrx (code, ARMREG_IP0, ARMREG_FP, ctx_offset + G_STRUCT_OFFSET (MonoContext, pc));
596 arm_strx (code, ARMREG_IP0, ARMREG_FP, 8);
597 gregs_regset = ~((1 << ARMREG_FP) | (1 << ARMREG_SP));
598 code = mono_arm_emit_load_regarray (code, gregs_regset, ARMREG_FP, ctx_offset + G_STRUCT_OFFSET (MonoContext, regs));
600 code = mono_arm_emit_destroy_frame (code, frame_size, ((1 << ARMREG_IP0) | (1 << ARMREG_IP1)));
602 arm_retx (code, ARMREG_LR);
604 mono_arch_flush_icache (code, code - buf);
605 g_assert (code - buf <= tramp_size);
607 const char *tramp_name = single_step ? "sdb_single_step_trampoline" : "sdb_breakpoint_trampoline";
608 *info = mono_tramp_info_create (tramp_name, buf, code - buf, ji, unwind_ops);
614 * mono_arch_get_enter_icall_trampoline:
616 * See tramp-amd64.c for documentation.
619 mono_arch_get_enter_icall_trampoline (MonoTrampInfo **info)
621 #ifdef ENABLE_INTERPRETER
622 const int gregs_num = INTERP_ICALL_TRAMP_IARGS;
623 const int fregs_num = INTERP_ICALL_TRAMP_FARGS;
625 guint8 *start = NULL, *code, *label_gexits [gregs_num], *label_fexits [fregs_num], *label_leave_tramp [3], *label_is_float_ret;
626 MonoJumpInfo *ji = NULL;
627 GSList *unwind_ops = NULL;
628 int buf_len, i, framesize = 0, off_methodargs, off_targetaddr;
630 buf_len = 512 + 1024;
631 start = code = (guint8 *) mono_global_codeman_reserve (buf_len);
634 framesize += 2 * sizeof (mgreg_t);
636 off_methodargs = framesize;
637 framesize += sizeof (mgreg_t);
639 off_targetaddr = framesize;
640 framesize += sizeof (mgreg_t);
642 framesize = ALIGN_TO (framesize, MONO_ARCH_FRAME_ALIGNMENT);
644 /* allocate space on stack for argument passing */
645 const int stack_space = ALIGN_TO (((gregs_num - ARMREG_R7) * sizeof (mgreg_t)), MONO_ARCH_FRAME_ALIGNMENT);
647 arm_subx_imm (code, ARMREG_SP, ARMREG_SP, stack_space + framesize);
648 arm_stpx (code, ARMREG_FP, ARMREG_LR, ARMREG_SP, stack_space);
649 arm_addx_imm (code, ARMREG_FP, ARMREG_SP, stack_space);
651 /* save InterpMethodArguments* onto stack */
652 arm_strx (code, ARMREG_R1, ARMREG_FP, off_methodargs);
654 /* save target address onto stack */
655 arm_strx (code, ARMREG_R0, ARMREG_FP, off_targetaddr);
657 /* load pointer to InterpMethodArguments* into IP0 */
658 arm_movx (code, ARMREG_IP0, ARMREG_R1);
660 /* move flen into R9 */
661 arm_ldrx (code, ARMREG_R9, ARMREG_IP0, MONO_STRUCT_OFFSET (InterpMethodArguments, flen));
662 /* load pointer to fargs into R10 */
663 arm_ldrx (code, ARMREG_R10, ARMREG_IP0, MONO_STRUCT_OFFSET (InterpMethodArguments, fargs));
665 for (i = 0; i < fregs_num; ++i) {
666 arm_cmpx_imm (code, ARMREG_R9, 0);
667 label_fexits [i] = code;
668 arm_bcc (code, ARMCOND_EQ, 0);
670 g_assert (i <= ARMREG_D7); /* otherwise, need to pass args on stack */
671 arm_ldrfpx (code, i, ARMREG_R10, i * sizeof (double));
672 arm_subx_imm (code, ARMREG_R9, ARMREG_R9, 1);
675 for (i = 0; i < fregs_num; i++)
676 mono_arm_patch (label_fexits [i], code, MONO_R_ARM64_BCC);
678 /* move ilen into R9 */
679 arm_ldrx (code, ARMREG_R9, ARMREG_IP0, MONO_STRUCT_OFFSET (InterpMethodArguments, ilen));
680 /* load pointer to iargs into R10 */
681 arm_ldrx (code, ARMREG_R10, ARMREG_IP0, MONO_STRUCT_OFFSET (InterpMethodArguments, iargs));
683 int stack_offset = 0;
684 for (i = 0; i < gregs_num; i++) {
685 arm_cmpx_imm (code, ARMREG_R9, 0);
686 label_gexits [i] = code;
687 arm_bcc (code, ARMCOND_EQ, 0);
689 if (i <= ARMREG_R7) {
690 arm_ldrx (code, i, ARMREG_R10, i * sizeof (mgreg_t));
692 arm_ldrx (code, ARMREG_R11, ARMREG_R10, i * sizeof (mgreg_t));
693 arm_strx (code, ARMREG_R11, ARMREG_SP, stack_offset);
694 stack_offset += sizeof (mgreg_t);
696 arm_subx_imm (code, ARMREG_R9, ARMREG_R9, 1);
699 for (i = 0; i < gregs_num; i++)
700 mono_arm_patch (label_gexits [i], code, MONO_R_ARM64_BCC);
702 /* load target addr */
703 arm_ldrx (code, ARMREG_R11, ARMREG_FP, off_targetaddr);
705 /* call into native function */
706 arm_blrx (code, ARMREG_R11);
708 /* load InterpMethodArguments */
709 arm_ldrx (code, ARMREG_IP0, ARMREG_FP, off_methodargs);
711 /* load is_float_ret */
712 arm_ldrx (code, ARMREG_R11, ARMREG_IP0, MONO_STRUCT_OFFSET (InterpMethodArguments, is_float_ret));
714 /* check if a float return value is expected */
715 arm_cmpx_imm (code, ARMREG_R11, 0);
716 label_is_float_ret = code;
717 arm_bcc (code, ARMCOND_NE, 0);
721 arm_ldrx (code, ARMREG_R11, ARMREG_IP0, MONO_STRUCT_OFFSET (InterpMethodArguments, retval));
723 arm_cmpx_imm (code, ARMREG_R11, 0);
724 label_leave_tramp [0] = code;
725 arm_bcc (code, ARMCOND_EQ, 0);
727 /* store greg result */
728 arm_strx (code, ARMREG_R0, ARMREG_R11, 0);
730 label_leave_tramp [1] = code;
731 arm_bcc (code, ARMCOND_AL, 0);
734 mono_arm_patch (label_is_float_ret, code, MONO_R_ARM64_BCC);
736 arm_ldrx (code, ARMREG_R11, ARMREG_IP0, MONO_STRUCT_OFFSET (InterpMethodArguments, retval));
738 arm_cmpx_imm (code, ARMREG_R11, 0);
739 label_leave_tramp [2] = code;
740 arm_bcc (code, ARMCOND_EQ, 0);
742 /* store freg result */
743 arm_strfpx (code, ARMREG_D0, ARMREG_R11, 0);
745 for (i = 0; i < 3; i++)
746 mono_arm_patch (label_leave_tramp [i], code, MONO_R_ARM64_BCC);
748 arm_movspx (code, ARMREG_SP, ARMREG_FP);
749 arm_ldpx (code, ARMREG_FP, ARMREG_LR, ARMREG_SP, 0);
750 arm_addx_imm (code, ARMREG_SP, ARMREG_SP, framesize);
751 arm_retx (code, ARMREG_LR);
753 g_assert (code - start < buf_len);
755 mono_arch_flush_icache (start, code - start);
756 MONO_PROFILER_RAISE (jit_code_buffer, (start, code - start, MONO_PROFILER_CODE_BUFFER_EXCEPTION_HANDLING, NULL));
759 *info = mono_tramp_info_create ("enter_icall_trampoline", start, code - start, ji, unwind_ops);
763 g_assert_not_reached ();
765 #endif /* ENABLE_INTERPRETER */
768 #else /* DISABLE_JIT */
771 mono_arch_create_generic_trampoline (MonoTrampolineType tramp_type, MonoTrampInfo **info, gboolean aot)
773 g_assert_not_reached ();
778 mono_arch_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
780 g_assert_not_reached ();
785 mono_arch_get_unbox_trampoline (MonoMethod *m, gpointer addr)
787 g_assert_not_reached ();
792 mono_arch_get_static_rgctx_trampoline (gpointer arg, gpointer addr)
794 g_assert_not_reached ();
799 mono_arch_create_rgctx_lazy_fetch_trampoline (guint32 slot, MonoTrampInfo **info, gboolean aot)
801 g_assert_not_reached ();
806 mono_arch_get_nullified_class_init_trampoline (MonoTrampInfo **info)
808 g_assert_not_reached ();
813 mono_arch_create_sdb_trampoline (gboolean single_step, MonoTrampInfo **info, gboolean aot)
815 g_assert_not_reached ();
820 mono_arch_get_enter_icall_trampoline (MonoTrampInfo **info)
822 g_assert_not_reached ();
825 #endif /* !DISABLE_JIT */