2 * tramp-arm64.c: JIT trampoline code for ARM64
4 * Copyright 2013 Xamarin Inc
6 * Based on tramp-arm.c:
9 * Paolo Molaro (lupus@ximian.com)
11 * (C) 2001-2003 Ximian, Inc.
12 * Copyright 2003-2011 Novell Inc
13 * Copyright 2011 Xamarin Inc
14 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
18 #include "debugger-agent.h"
20 #include <mono/arch/arm64/arm64-codegen.h>
21 #include <mono/metadata/abi-details.h>
23 #define ALIGN_TO(val,align) ((((guint64)val) + ((align) - 1)) & ~((align) - 1))
26 mono_arch_patch_callsite (guint8 *method_start, guint8 *code_ptr, guint8 *addr)
28 mono_arm_patch (code_ptr - 4, addr, MONO_R_ARM64_BL);
29 mono_arch_flush_icache (code_ptr - 4, 4);
33 mono_arch_patch_plt_entry (guint8 *code, gpointer *got, mgreg_t *regs, guint8 *addr)
40 * Decode the address loaded by the PLT entry emitted by arch_emit_plt_entry () in
45 ins = ((guint32*)code) [0];
46 g_assert (((ins >> 24) & 0x1f) == 0x10);
47 disp = (((ins >> 5) & 0x7ffff) << 2) | ((ins >> 29) & 0x3);
48 /* FIXME: disp is signed */
49 g_assert ((disp >> 20) == 0);
51 slot_addr = ((guint64)code + (disp << 12)) & ~0xfff;
53 /* add x16, x16, :lo12:got */
54 ins = ((guint32*)code) [1];
55 g_assert (((ins >> 22) & 0x3) == 0);
56 slot_addr += (ins >> 10) & 0xfff;
58 /* ldr x16, [x16, <offset>] */
59 ins = ((guint32*)code) [2];
60 g_assert (((ins >> 24) & 0x3f) == 0x39);
61 slot_addr += ((ins >> 10) & 0xfff) * 8;
63 g_assert (*(guint64*)slot_addr);
64 *(gpointer*)slot_addr = addr;
68 mono_arch_get_call_target (guint8 *code)
75 imm = *(guint32*)code;
77 g_assert (((imm >> 31) & 0x1) == 0x1);
78 g_assert (((imm >> 26) & 0x7) == 0x5);
80 disp = (imm & 0x3ffffff);
81 if ((disp >> 25) != 0)
82 /* Negative, sing extend to 32 bits */
83 disp = disp | 0xfc000000;
85 return code + (disp * 4);
89 mono_arch_get_plt_info_offset (guint8 *plt_entry, mgreg_t *regs, guint8 *code)
91 /* The offset is stored as the 5th word of the plt entry */
92 return ((guint32*)plt_entry) [4];
98 mono_arch_create_generic_trampoline (MonoTrampolineType tramp_type, MonoTrampInfo **info, gboolean aot)
100 guint8 *code, *buf, *tramp, *labels [16];
102 int frame_size, offset, gregs_offset, num_fregs, fregs_offset, arg_offset, lmf_offset, res_offset;
103 guint64 gregs_regset;
104 GSList *unwind_ops = NULL;
105 MonoJumpInfo *ji = NULL;
109 buf = code = mono_global_codeman_reserve (buf_len);
112 * We are getting called by a specific trampoline, ip1 contains the trampoline argument.
115 /* Compute stack frame size and offsets */
120 gregs_offset = offset;
123 // FIXME: Save 128 bits
124 /* Only have to save the argument regs */
126 fregs_offset = offset;
127 offset += num_fregs * 8;
136 offset += sizeof (MonoLMF);
138 frame_size = ALIGN_TO (offset, MONO_ARCH_FRAME_ALIGNMENT);
140 /* Setup stack frame */
143 arm_subx_imm (code, ARMREG_SP, ARMREG_SP, 256);
146 arm_subx_imm (code, ARMREG_SP, ARMREG_SP, imm);
147 arm_stpx (code, ARMREG_FP, ARMREG_LR, ARMREG_SP, 0);
148 arm_movspx (code, ARMREG_FP, ARMREG_SP);
151 // FIXME: Optimize this
152 gregs_regset = ~((1 << ARMREG_FP) | (1 << ARMREG_SP));
153 code = mono_arm_emit_store_regarray (code, gregs_regset, ARMREG_FP, gregs_offset);
155 for (i = 0; i < num_fregs; ++i)
156 arm_strfpx (code, i, ARMREG_FP, fregs_offset + (i * 8));
157 /* Save trampoline arg */
158 arm_strx (code, ARMREG_IP1, ARMREG_FP, arg_offset);
161 arm_addx_imm (code, ARMREG_IP0, ARMREG_FP, lmf_offset);
162 code = mono_arm_emit_store_regset (code, MONO_ARCH_LMF_REGS, ARMREG_IP0, MONO_STRUCT_OFFSET (MonoLMF, gregs));
164 arm_ldrx (code, ARMREG_IP1, ARMREG_FP, 0);
165 arm_strx (code, ARMREG_IP1, ARMREG_IP0, MONO_STRUCT_OFFSET (MonoLMF, gregs) + (MONO_ARCH_LMF_REG_FP * 8));
167 arm_movx (code, ARMREG_IP1, ARMREG_FP);
170 arm_addx_imm (code, ARMREG_IP1, ARMREG_IP1, 256);
173 arm_addx_imm (code, ARMREG_IP1, ARMREG_IP1, imm);
174 arm_strx (code, ARMREG_IP1, ARMREG_IP0, MONO_STRUCT_OFFSET (MonoLMF, gregs) + (MONO_ARCH_LMF_REG_SP * 8));
176 if (tramp_type == MONO_TRAMPOLINE_JUMP)
177 arm_movx (code, ARMREG_LR, ARMREG_RZR);
179 arm_ldrx (code, ARMREG_LR, ARMREG_FP, 8);
180 arm_strx (code, ARMREG_LR, ARMREG_IP0, MONO_STRUCT_OFFSET (MonoLMF, pc));
183 /* Similar to emit_save_lmf () */
185 code = mono_arm_emit_aotconst (&ji, code, buf, ARMREG_IP0, MONO_PATCH_INFO_JIT_ICALL_ADDR, "mono_get_lmf_addr");
187 tramp = (guint8*)mono_get_lmf_addr;
188 code = mono_arm_emit_imm64 (code, ARMREG_IP0, (guint64)tramp);
190 arm_blrx (code, ARMREG_IP0);
191 /* r0 contains the address of the tls slot holding the current lmf */
193 arm_addx_imm (code, ARMREG_IP0, ARMREG_FP, lmf_offset);
194 /* lmf->lmf_addr = lmf_addr */
195 arm_strx (code, ARMREG_R0, ARMREG_IP0, MONO_STRUCT_OFFSET (MonoLMF, lmf_addr));
196 /* lmf->previous_lmf = *lmf_addr */
197 arm_ldrx (code, ARMREG_IP1, ARMREG_R0, 0);
198 arm_strx (code, ARMREG_IP1, ARMREG_IP0, MONO_STRUCT_OFFSET (MonoLMF, previous_lmf));
199 /* *lmf_addr = lmf */
200 arm_strx (code, ARMREG_IP0, ARMREG_R0, 0);
202 /* Call the C trampoline function */
204 arm_addx_imm (code, ARMREG_R0, ARMREG_FP, gregs_offset);
206 if (tramp_type == MONO_TRAMPOLINE_JUMP)
207 arm_movx (code, ARMREG_R1, ARMREG_RZR);
209 arm_ldrx (code, ARMREG_R1, ARMREG_FP, gregs_offset + (ARMREG_LR * 8));
211 if (MONO_TRAMPOLINE_TYPE_HAS_ARG (tramp_type))
213 arm_ldrx (code, ARMREG_R2, ARMREG_FP, gregs_offset + (ARMREG_R0 * 8));
215 arm_ldrx (code, ARMREG_R2, ARMREG_FP, arg_offset);
216 /* Arg 4 = trampoline addr */
217 arm_movx (code, ARMREG_R3, ARMREG_RZR);
220 char *icall_name = g_strdup_printf ("trampoline_func_%d", tramp_type);
221 code = mono_arm_emit_aotconst (&ji, code, buf, ARMREG_IP0, MONO_PATCH_INFO_JIT_ICALL_ADDR, icall_name);
223 tramp = (guint8*)mono_get_trampoline_func (tramp_type);
224 code = mono_arm_emit_imm64 (code, ARMREG_IP0, (guint64)tramp);
226 arm_blrx (code, ARMREG_IP0);
228 /* Save the result */
229 arm_strx (code, ARMREG_R0, ARMREG_FP, res_offset);
232 /* Similar to emit_restore_lmf () */
233 /* Clobbers ip0/ip1 */
235 arm_addx_imm (code, ARMREG_IP0, ARMREG_FP, lmf_offset);
236 /* ip1 = lmf->previous_lmf */
237 arm_ldrx (code, ARMREG_IP1, ARMREG_IP0, MONO_STRUCT_OFFSET (MonoLMF, previous_lmf));
238 /* ip0 = lmf->lmf_addr */
239 arm_ldrx (code, ARMREG_IP0, ARMREG_IP0, MONO_STRUCT_OFFSET (MonoLMF, lmf_addr));
240 /* *lmf_addr = previous_lmf */
241 arm_strx (code, ARMREG_IP1, ARMREG_IP0, 0);
243 /* Check for thread interruption */
244 /* This is not perf critical code so no need to check the interrupt flag */
246 code = mono_arm_emit_aotconst (&ji, code, buf, ARMREG_IP0, MONO_PATCH_INFO_JIT_ICALL_ADDR, "mono_thread_force_interruption_checkpoint_noraise");
248 code = mono_arm_emit_imm64 (code, ARMREG_IP0, (guint64)mono_thread_force_interruption_checkpoint_noraise);
250 arm_blrx (code, ARMREG_IP0);
251 /* Check whenever there is an exception to be thrown */
253 arm_cbnzx (code, ARMREG_R0, 0);
258 /* Only have to load the argument regs (r0..r8) and the rgctx reg */
259 code = mono_arm_emit_load_regarray (code, 0x1ff | (1 << ARMREG_LR) | (1 << MONO_ARCH_RGCTX_REG), ARMREG_FP, gregs_offset);
261 for (i = 0; i < num_fregs; ++i)
262 arm_ldrfpx (code, i, ARMREG_FP, fregs_offset + (i * 8));
264 /* Load the result */
265 arm_ldrx (code, ARMREG_IP1, ARMREG_FP, res_offset);
267 /* These trampolines return a value */
268 if (tramp_type == MONO_TRAMPOLINE_RGCTX_LAZY_FETCH)
269 arm_movx (code, ARMREG_R0, ARMREG_IP1);
272 code = mono_arm_emit_destroy_frame (code, frame_size, ((1 << ARMREG_IP0)));
274 if (tramp_type == MONO_TRAMPOLINE_RGCTX_LAZY_FETCH)
275 arm_retx (code, ARMREG_LR);
277 arm_brx (code, ARMREG_IP1);
280 mono_arm_patch (labels [0], code, MONO_R_ARM64_CBZ);
283 * We have an exception we want to throw in the caller's frame, so pop
284 * the trampoline frame and throw from the caller.
286 code = mono_arm_emit_destroy_frame (code, frame_size, ((1 << ARMREG_IP0)));
287 /* We are in the parent frame, the exception is in x0 */
289 * EH is initialized after trampolines, so get the address of the variable
290 * which contains throw_exception, and load it from there.
293 /* Not really a jit icall */
294 code = mono_arm_emit_aotconst (&ji, code, buf, ARMREG_IP0, MONO_PATCH_INFO_JIT_ICALL_ADDR, "throw_exception_addr");
296 code = mono_arm_emit_imm64 (code, ARMREG_IP0, (guint64)mono_get_throw_exception_addr ());
298 arm_ldrx (code, ARMREG_IP0, ARMREG_IP0, 0);
299 /* lr contains the return address, the trampoline will use it as the throw site */
300 arm_brx (code, ARMREG_IP0);
302 g_assert ((code - buf) < buf_len);
303 mono_arch_flush_icache (buf, code - buf);
306 tramp_name = mono_get_generic_trampoline_name (tramp_type);
307 *info = mono_tramp_info_create (tramp_name, buf, code - buf, ji, unwind_ops);
315 mono_arch_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
317 guint8 *code, *buf, *tramp;
321 * Return a trampoline which calls generic trampoline TRAMP_TYPE passing in ARG1.
322 * Pass the argument in ip1, clobbering ip0.
324 tramp = mono_get_trampoline_code (tramp_type);
326 buf = code = mono_global_codeman_reserve (buf_len);
328 code = mono_arm_emit_imm64 (code, ARMREG_IP1, (guint64)arg1);
329 code = mono_arm_emit_imm64 (code, ARMREG_IP0, (guint64)tramp);
331 arm_brx (code, ARMREG_IP0);
333 g_assert ((code - buf) < buf_len);
334 mono_arch_flush_icache (buf, code - buf);
336 *code_len = code - buf;
342 mono_arch_get_unbox_trampoline (MonoMethod *m, gpointer addr)
344 guint8 *code, *start;
346 MonoDomain *domain = mono_domain_get ();
348 start = code = mono_domain_code_reserve (domain, size);
349 code = mono_arm_emit_imm64 (code, ARMREG_IP0, (guint64)addr);
350 arm_addx_imm (code, ARMREG_R0, ARMREG_R0, sizeof (MonoObject));
351 arm_brx (code, ARMREG_IP0);
353 g_assert ((code - start) <= size);
354 mono_arch_flush_icache (start, code - start);
359 mono_arch_get_static_rgctx_trampoline (MonoMethod *m, MonoMethodRuntimeGenericContext *mrgctx, gpointer addr)
361 guint8 *code, *start;
362 guint32 buf_len = 32;
363 MonoDomain *domain = mono_domain_get ();
365 start = code = mono_domain_code_reserve (domain, buf_len);
366 code = mono_arm_emit_imm64 (code, MONO_ARCH_RGCTX_REG, (guint64)mrgctx);
367 code = mono_arm_emit_imm64 (code, ARMREG_IP0, (guint64)addr);
368 arm_brx (code, ARMREG_IP0);
370 g_assert ((code - start) <= buf_len);
372 mono_arch_flush_icache (start, code - start);
378 mono_arch_create_rgctx_lazy_fetch_trampoline (guint32 slot, MonoTrampInfo **info, gboolean aot)
382 int i, depth, index, njumps;
384 guint8 **rgctx_null_jumps;
385 MonoJumpInfo *ji = NULL;
386 GSList *unwind_ops = NULL;
390 is_mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
391 index = MONO_RGCTX_SLOT_INDEX (slot);
393 index += MONO_SIZEOF_METHOD_RUNTIME_GENERIC_CONTEXT / sizeof (gpointer);
394 for (depth = 0; ; ++depth) {
395 int size = mono_class_rgctx_get_array_size (depth, is_mrgctx);
397 if (index < size - 1)
402 buf_size = 64 + 16 * depth;
403 code = buf = mono_global_codeman_reserve (buf_size);
405 rgctx_null_jumps = g_malloc0 (sizeof (guint8*) * (depth + 2));
408 /* The vtable/mrgtx is in R0 */
409 g_assert (MONO_ARCH_VTABLE_REG == ARMREG_R0);
413 arm_movx (code, ARMREG_IP1, ARMREG_R0);
415 /* load rgctx ptr from vtable */
416 code = mono_arm_emit_ldrx (code, ARMREG_IP1, ARMREG_R0, MONO_STRUCT_OFFSET (MonoVTable, runtime_generic_context));
417 /* is the rgctx ptr null? */
418 /* if yes, jump to actual trampoline */
419 rgctx_null_jumps [njumps ++] = code;
420 arm_cbzx (code, ARMREG_IP1, 0);
423 for (i = 0; i < depth; ++i) {
424 /* load ptr to next array */
425 if (is_mrgctx && i == 0) {
426 code = mono_arm_emit_ldrx (code, ARMREG_IP1, ARMREG_IP1, MONO_SIZEOF_METHOD_RUNTIME_GENERIC_CONTEXT);
428 code = mono_arm_emit_ldrx (code, ARMREG_IP1, ARMREG_IP1, 0);
430 /* is the ptr null? */
431 /* if yes, jump to actual trampoline */
432 rgctx_null_jumps [njumps ++] = code;
433 arm_cbzx (code, ARMREG_IP1, 0);
437 code = mono_arm_emit_ldrx (code, ARMREG_IP1, ARMREG_IP1, sizeof (gpointer) * (index + 1));
438 /* is the slot null? */
439 /* if yes, jump to actual trampoline */
440 rgctx_null_jumps [njumps ++] = code;
441 arm_cbzx (code, ARMREG_IP1, 0);
442 /* otherwise return, result is in IP1 */
443 arm_movx (code, ARMREG_R0, ARMREG_IP1);
444 arm_brx (code, ARMREG_LR);
446 g_assert (njumps <= depth + 2);
447 for (i = 0; i < njumps; ++i)
448 mono_arm_patch (rgctx_null_jumps [i], code, MONO_R_ARM64_CBZ);
450 g_free (rgctx_null_jumps);
454 /* Call mono_rgctx_lazy_fetch_trampoline (), passing in the slot as argument */
455 /* The vtable/mrgctx is still in R0 */
457 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));
459 tramp = mono_arch_create_specific_trampoline (GUINT_TO_POINTER (slot), MONO_TRAMPOLINE_RGCTX_LAZY_FETCH, mono_get_root_domain (), &code_len);
460 code = mono_arm_emit_imm64 (code, ARMREG_IP0, (guint64)tramp);
462 arm_brx (code, ARMREG_IP0);
464 mono_arch_flush_icache (buf, code - buf);
466 g_assert (code - buf <= buf_size);
469 char *name = mono_get_rgctx_fetch_trampoline_name (slot);
470 *info = mono_tramp_info_create (name, buf, code - buf, ji, unwind_ops);
478 mono_arch_create_general_rgctx_lazy_fetch_trampoline (MonoTrampInfo **info, gboolean aot)
482 MonoJumpInfo *ji = NULL;
483 GSList *unwind_ops = NULL;
489 code = buf = mono_global_codeman_reserve (tramp_size);
491 mono_add_unwind_op_def_cfa (unwind_ops, code, buf, ARMREG_SP, 0);
493 // FIXME: Currently, we always go to the slow path.
494 /* Load trampoline addr */
495 arm_ldrx (code, ARMREG_IP0, MONO_ARCH_RGCTX_REG, 8);
496 /* The vtable/mrgctx is in R0 */
497 g_assert (MONO_ARCH_VTABLE_REG == ARMREG_R0);
498 arm_brx (code, ARMREG_IP0);
500 mono_arch_flush_icache (buf, code - buf);
502 g_assert (code - buf <= tramp_size);
505 *info = mono_tramp_info_create ("rgctx_fetch_trampoline_general", buf, code - buf, ji, unwind_ops);
511 handler_block_trampoline_helper (gpointer *ptr)
513 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
514 return jit_tls->handler_block_return_address;
518 mono_arch_create_handler_block_trampoline (MonoTrampInfo **info, gboolean aot)
523 MonoJumpInfo *ji = NULL;
524 GSList *unwind_ops = NULL;
528 code = buf = mono_global_codeman_reserve (tramp_size);
532 tramp = mono_arch_create_specific_trampoline (NULL, MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD, NULL, NULL);
535 This trampoline restore the call chain of the handler block then jumps into the code that deals with it.
539 * We are in a method frame after the call emitted by OP_CALL_HANDLER.
541 code = mono_arm_emit_imm64 (code, ARMREG_IP0, (guint64)handler_block_trampoline_helper);
542 /* Set it as the return address so the trampoline will return to it */
543 arm_movx (code, ARMREG_LR, ARMREG_IP0);
545 /* Call the trampoline */
546 code = mono_arm_emit_imm64 (code, ARMREG_IP0, (guint64)tramp);
547 arm_brx (code, ARMREG_IP0);
549 mono_arch_flush_icache (buf, code - buf);
550 mono_profiler_code_buffer_new (buf, code - buf, MONO_PROFILER_CODE_BUFFER_HELPER, NULL);
551 g_assert (code - buf <= tramp_size);
553 *info = mono_tramp_info_create ("handler_block_trampoline", buf, code - buf, ji, unwind_ops);
559 * mono_arch_create_sdb_trampoline:
561 * Return a trampoline which captures the current context, passes it to
562 * debugger_agent_single_step_from_context ()/debugger_agent_breakpoint_from_context (),
563 * then restores the (potentially changed) context.
566 mono_arch_create_sdb_trampoline (gboolean single_step, MonoTrampInfo **info, gboolean aot)
568 int tramp_size = 512;
569 int offset, imm, frame_size, ctx_offset;
570 guint64 gregs_regset;
572 GSList *unwind_ops = NULL;
573 MonoJumpInfo *ji = NULL;
575 code = buf = mono_global_codeman_reserve (tramp_size);
577 /* Compute stack frame size and offsets */
583 offset += sizeof (MonoContext);
584 offset = ALIGN_TO (offset, MONO_ARCH_FRAME_ALIGNMENT);
587 // FIXME: Unwind info
589 /* Setup stack frame */
592 arm_subx_imm (code, ARMREG_SP, ARMREG_SP, 256);
595 arm_subx_imm (code, ARMREG_SP, ARMREG_SP, imm);
596 arm_stpx (code, ARMREG_FP, ARMREG_LR, ARMREG_SP, 0);
597 arm_movspx (code, ARMREG_FP, ARMREG_SP);
599 /* Initialize a MonoContext structure on the stack */
600 /* No need to save fregs */
601 gregs_regset = ~((1 << ARMREG_FP) | (1 << ARMREG_SP));
602 code = mono_arm_emit_store_regarray (code, gregs_regset, ARMREG_FP, ctx_offset + G_STRUCT_OFFSET (MonoContext, regs));
604 arm_ldrx (code, ARMREG_IP1, ARMREG_FP, 0);
605 arm_strx (code, ARMREG_IP1, ARMREG_FP, ctx_offset + G_STRUCT_OFFSET (MonoContext, regs) + (ARMREG_FP * 8));
607 arm_movx (code, ARMREG_IP1, ARMREG_FP);
610 arm_addx_imm (code, ARMREG_IP1, ARMREG_IP1, 256);
613 arm_addx_imm (code, ARMREG_IP1, ARMREG_IP1, imm);
614 arm_strx (code, ARMREG_IP1, ARMREG_FP, ctx_offset + G_STRUCT_OFFSET (MonoContext, regs) + (ARMREG_SP * 8));
616 arm_ldrx (code, ARMREG_IP1, ARMREG_FP, 8);
617 arm_strx (code, ARMREG_IP1, ARMREG_FP, ctx_offset + G_STRUCT_OFFSET (MonoContext, pc));
619 /* Call the single step/breakpoint function in sdb */
621 arm_addx_imm (code, ARMREG_R0, ARMREG_FP, ctx_offset);
624 code = mono_arm_emit_aotconst (&ji, code, buf, ARMREG_IP0, MONO_PATCH_INFO_JIT_ICALL_ADDR, "debugger_agent_single_step_from_context");
626 code = mono_arm_emit_aotconst (&ji, code, buf, ARMREG_IP0, MONO_PATCH_INFO_JIT_ICALL_ADDR, "debugger_agent_breakpoint_from_context");
628 gpointer addr = single_step ? debugger_agent_single_step_from_context : debugger_agent_breakpoint_from_context;
630 code = mono_arm_emit_imm64 (code, ARMREG_IP0, (guint64)addr);
632 arm_blrx (code, ARMREG_IP0);
635 /* Save fp/pc into the frame block */
636 arm_ldrx (code, ARMREG_IP0, ARMREG_FP, ctx_offset + G_STRUCT_OFFSET (MonoContext, regs) + (ARMREG_FP * 8));
637 arm_strx (code, ARMREG_IP0, ARMREG_FP, 0);
638 arm_ldrx (code, ARMREG_IP0, ARMREG_FP, ctx_offset + G_STRUCT_OFFSET (MonoContext, pc));
639 arm_strx (code, ARMREG_IP0, ARMREG_FP, 8);
640 gregs_regset = ~((1 << ARMREG_FP) | (1 << ARMREG_SP));
641 code = mono_arm_emit_load_regarray (code, gregs_regset, ARMREG_FP, ctx_offset + G_STRUCT_OFFSET (MonoContext, regs));
643 code = mono_arm_emit_destroy_frame (code, frame_size, ((1 << ARMREG_IP0) | (1 << ARMREG_IP1)));
645 arm_retx (code, ARMREG_LR);
647 mono_arch_flush_icache (code, code - buf);
648 g_assert (code - buf <= tramp_size);
650 const char *tramp_name = single_step ? "sdb_single_step_trampoline" : "sdb_breakpoint_trampoline";
651 *info = mono_tramp_info_create (tramp_name, buf, code - buf, ji, unwind_ops);
656 #else /* DISABLE_JIT */
659 mono_arch_create_generic_trampoline (MonoTrampolineType tramp_type, MonoTrampInfo **info, gboolean aot)
661 g_assert_not_reached ();
666 mono_arch_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
668 g_assert_not_reached ();
673 mono_arch_create_handler_block_trampoline (MonoTrampInfo **info, gboolean aot)
675 g_assert_not_reached ();
680 mono_arch_get_unbox_trampoline (MonoMethod *m, gpointer addr)
682 g_assert_not_reached ();
687 mono_arch_get_static_rgctx_trampoline (MonoMethod *m, MonoMethodRuntimeGenericContext *mrgctx, gpointer addr)
689 g_assert_not_reached ();
694 mono_arch_create_rgctx_lazy_fetch_trampoline (guint32 slot, MonoTrampInfo **info, gboolean aot)
696 g_assert_not_reached ();
701 mono_arch_get_nullified_class_init_trampoline (MonoTrampInfo **info)
703 g_assert_not_reached ();
708 mono_arch_create_sdb_trampoline (gboolean single_step, MonoTrampInfo **info, gboolean aot)
710 g_assert_not_reached ();
714 #endif /* !DISABLE_JIT */