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];
96 mono_arm_handler_block_trampoline_helper (gpointer *ptr)
98 MonoJitTlsData *jit_tls = mono_tls_get_jit_tls ();
99 return jit_tls->handler_block_return_address;
105 mono_arch_create_generic_trampoline (MonoTrampolineType tramp_type, MonoTrampInfo **info, gboolean aot)
107 guint8 *code, *buf, *tramp, *labels [16];
109 int frame_size, offset, gregs_offset, num_fregs, fregs_offset, arg_offset, lmf_offset, res_offset;
110 guint64 gregs_regset;
111 GSList *unwind_ops = NULL;
112 MonoJumpInfo *ji = NULL;
116 buf = code = mono_global_codeman_reserve (buf_len);
119 * We are getting called by a specific trampoline, ip1 contains the trampoline argument.
122 /* Compute stack frame size and offsets */
127 gregs_offset = offset;
130 // FIXME: Save 128 bits
131 /* Only have to save the argument regs */
133 fregs_offset = offset;
134 offset += num_fregs * 8;
143 offset += sizeof (MonoLMF);
145 frame_size = ALIGN_TO (offset, MONO_ARCH_FRAME_ALIGNMENT);
147 /* Setup stack frame */
150 arm_subx_imm (code, ARMREG_SP, ARMREG_SP, 256);
153 arm_subx_imm (code, ARMREG_SP, ARMREG_SP, imm);
154 arm_stpx (code, ARMREG_FP, ARMREG_LR, ARMREG_SP, 0);
155 arm_movspx (code, ARMREG_FP, ARMREG_SP);
158 // FIXME: Optimize this
159 gregs_regset = ~((1 << ARMREG_FP) | (1 << ARMREG_SP));
160 code = mono_arm_emit_store_regarray (code, gregs_regset, ARMREG_FP, gregs_offset);
162 for (i = 0; i < num_fregs; ++i)
163 arm_strfpx (code, i, ARMREG_FP, fregs_offset + (i * 8));
164 /* Save trampoline arg */
165 arm_strx (code, ARMREG_IP1, ARMREG_FP, arg_offset);
168 arm_addx_imm (code, ARMREG_IP0, ARMREG_FP, lmf_offset);
169 code = mono_arm_emit_store_regset (code, MONO_ARCH_LMF_REGS, ARMREG_IP0, MONO_STRUCT_OFFSET (MonoLMF, gregs));
171 arm_ldrx (code, ARMREG_IP1, ARMREG_FP, 0);
172 arm_strx (code, ARMREG_IP1, ARMREG_IP0, MONO_STRUCT_OFFSET (MonoLMF, gregs) + (MONO_ARCH_LMF_REG_FP * 8));
174 arm_movx (code, ARMREG_IP1, ARMREG_FP);
177 arm_addx_imm (code, ARMREG_IP1, ARMREG_IP1, 256);
180 arm_addx_imm (code, ARMREG_IP1, ARMREG_IP1, imm);
181 arm_strx (code, ARMREG_IP1, ARMREG_IP0, MONO_STRUCT_OFFSET (MonoLMF, gregs) + (MONO_ARCH_LMF_REG_SP * 8));
183 if (tramp_type == MONO_TRAMPOLINE_JUMP)
184 arm_movx (code, ARMREG_LR, ARMREG_RZR);
186 arm_ldrx (code, ARMREG_LR, ARMREG_FP, 8);
187 arm_strx (code, ARMREG_LR, ARMREG_IP0, MONO_STRUCT_OFFSET (MonoLMF, pc));
190 /* Similar to emit_save_lmf () */
192 code = mono_arm_emit_aotconst (&ji, code, buf, ARMREG_IP0, MONO_PATCH_INFO_JIT_ICALL_ADDR, "mono_get_lmf_addr");
194 tramp = (guint8*)mono_get_lmf_addr;
195 code = mono_arm_emit_imm64 (code, ARMREG_IP0, (guint64)tramp);
197 arm_blrx (code, ARMREG_IP0);
198 /* r0 contains the address of the tls slot holding the current lmf */
200 arm_addx_imm (code, ARMREG_IP0, ARMREG_FP, lmf_offset);
201 /* lmf->lmf_addr = lmf_addr */
202 arm_strx (code, ARMREG_R0, ARMREG_IP0, MONO_STRUCT_OFFSET (MonoLMF, lmf_addr));
203 /* lmf->previous_lmf = *lmf_addr */
204 arm_ldrx (code, ARMREG_IP1, ARMREG_R0, 0);
205 arm_strx (code, ARMREG_IP1, ARMREG_IP0, MONO_STRUCT_OFFSET (MonoLMF, previous_lmf));
206 /* *lmf_addr = lmf */
207 arm_strx (code, ARMREG_IP0, ARMREG_R0, 0);
209 /* Call the C trampoline function */
211 arm_addx_imm (code, ARMREG_R0, ARMREG_FP, gregs_offset);
213 if (tramp_type == MONO_TRAMPOLINE_JUMP)
214 arm_movx (code, ARMREG_R1, ARMREG_RZR);
216 arm_ldrx (code, ARMREG_R1, ARMREG_FP, gregs_offset + (ARMREG_LR * 8));
218 if (MONO_TRAMPOLINE_TYPE_HAS_ARG (tramp_type))
220 arm_ldrx (code, ARMREG_R2, ARMREG_FP, gregs_offset + (ARMREG_R0 * 8));
222 arm_ldrx (code, ARMREG_R2, ARMREG_FP, arg_offset);
223 /* Arg 4 = trampoline addr */
224 arm_movx (code, ARMREG_R3, ARMREG_RZR);
227 char *icall_name = g_strdup_printf ("trampoline_func_%d", tramp_type);
228 code = mono_arm_emit_aotconst (&ji, code, buf, ARMREG_IP0, MONO_PATCH_INFO_JIT_ICALL_ADDR, icall_name);
230 tramp = (guint8*)mono_get_trampoline_func (tramp_type);
231 code = mono_arm_emit_imm64 (code, ARMREG_IP0, (guint64)tramp);
233 arm_blrx (code, ARMREG_IP0);
235 /* Save the result */
236 arm_strx (code, ARMREG_R0, ARMREG_FP, res_offset);
239 /* Similar to emit_restore_lmf () */
240 /* Clobbers ip0/ip1 */
242 arm_addx_imm (code, ARMREG_IP0, ARMREG_FP, lmf_offset);
243 /* ip1 = lmf->previous_lmf */
244 arm_ldrx (code, ARMREG_IP1, ARMREG_IP0, MONO_STRUCT_OFFSET (MonoLMF, previous_lmf));
245 /* ip0 = lmf->lmf_addr */
246 arm_ldrx (code, ARMREG_IP0, ARMREG_IP0, MONO_STRUCT_OFFSET (MonoLMF, lmf_addr));
247 /* *lmf_addr = previous_lmf */
248 arm_strx (code, ARMREG_IP1, ARMREG_IP0, 0);
250 /* Check for thread interruption */
251 /* This is not perf critical code so no need to check the interrupt flag */
253 code = mono_arm_emit_aotconst (&ji, code, buf, ARMREG_IP0, MONO_PATCH_INFO_JIT_ICALL_ADDR, "mono_thread_force_interruption_checkpoint_noraise");
255 code = mono_arm_emit_imm64 (code, ARMREG_IP0, (guint64)mono_thread_force_interruption_checkpoint_noraise);
257 arm_blrx (code, ARMREG_IP0);
258 /* Check whenever there is an exception to be thrown */
260 arm_cbnzx (code, ARMREG_R0, 0);
265 /* Only have to load the argument regs (r0..r8) and the rgctx reg */
266 code = mono_arm_emit_load_regarray (code, 0x1ff | (1 << ARMREG_LR) | (1 << MONO_ARCH_RGCTX_REG), ARMREG_FP, gregs_offset);
268 for (i = 0; i < num_fregs; ++i)
269 arm_ldrfpx (code, i, ARMREG_FP, fregs_offset + (i * 8));
271 /* Load the result */
272 arm_ldrx (code, ARMREG_IP1, ARMREG_FP, res_offset);
274 /* These trampolines return a value */
275 if (tramp_type == MONO_TRAMPOLINE_RGCTX_LAZY_FETCH)
276 arm_movx (code, ARMREG_R0, ARMREG_IP1);
279 code = mono_arm_emit_destroy_frame (code, frame_size, ((1 << ARMREG_IP0)));
281 if (tramp_type == MONO_TRAMPOLINE_RGCTX_LAZY_FETCH)
282 arm_retx (code, ARMREG_LR);
284 arm_brx (code, ARMREG_IP1);
287 mono_arm_patch (labels [0], code, MONO_R_ARM64_CBZ);
290 * We have an exception we want to throw in the caller's frame, so pop
291 * the trampoline frame and throw from the caller.
293 code = mono_arm_emit_destroy_frame (code, frame_size, ((1 << ARMREG_IP0)));
294 /* We are in the parent frame, the exception is in x0 */
296 * EH is initialized after trampolines, so get the address of the variable
297 * which contains throw_exception, and load it from there.
300 /* Not really a jit icall */
301 code = mono_arm_emit_aotconst (&ji, code, buf, ARMREG_IP0, MONO_PATCH_INFO_JIT_ICALL_ADDR, "throw_exception_addr");
303 code = mono_arm_emit_imm64 (code, ARMREG_IP0, (guint64)mono_get_throw_exception_addr ());
305 arm_ldrx (code, ARMREG_IP0, ARMREG_IP0, 0);
306 /* lr contains the return address, the trampoline will use it as the throw site */
307 arm_brx (code, ARMREG_IP0);
309 g_assert ((code - buf) < buf_len);
310 mono_arch_flush_icache (buf, code - buf);
313 tramp_name = mono_get_generic_trampoline_name (tramp_type);
314 *info = mono_tramp_info_create (tramp_name, buf, code - buf, ji, unwind_ops);
322 mono_arch_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
324 guint8 *code, *buf, *tramp;
328 * Return a trampoline which calls generic trampoline TRAMP_TYPE passing in ARG1.
329 * Pass the argument in ip1, clobbering ip0.
331 tramp = mono_get_trampoline_code (tramp_type);
333 buf = code = mono_global_codeman_reserve (buf_len);
335 code = mono_arm_emit_imm64 (code, ARMREG_IP1, (guint64)arg1);
336 code = mono_arm_emit_imm64 (code, ARMREG_IP0, (guint64)tramp);
338 arm_brx (code, ARMREG_IP0);
340 g_assert ((code - buf) < buf_len);
341 mono_arch_flush_icache (buf, code - buf);
343 *code_len = code - buf;
349 mono_arch_get_unbox_trampoline (MonoMethod *m, gpointer addr)
351 guint8 *code, *start;
353 MonoDomain *domain = mono_domain_get ();
355 start = code = mono_domain_code_reserve (domain, size);
356 code = mono_arm_emit_imm64 (code, ARMREG_IP0, (guint64)addr);
357 arm_addx_imm (code, ARMREG_R0, ARMREG_R0, sizeof (MonoObject));
358 arm_brx (code, ARMREG_IP0);
360 g_assert ((code - start) <= size);
361 mono_arch_flush_icache (start, code - start);
366 mono_arch_get_static_rgctx_trampoline (MonoMethod *m, MonoMethodRuntimeGenericContext *mrgctx, gpointer addr)
368 guint8 *code, *start;
369 guint32 buf_len = 32;
370 MonoDomain *domain = mono_domain_get ();
372 start = code = mono_domain_code_reserve (domain, buf_len);
373 code = mono_arm_emit_imm64 (code, MONO_ARCH_RGCTX_REG, (guint64)mrgctx);
374 code = mono_arm_emit_imm64 (code, ARMREG_IP0, (guint64)addr);
375 arm_brx (code, ARMREG_IP0);
377 g_assert ((code - start) <= buf_len);
379 mono_arch_flush_icache (start, code - start);
385 mono_arch_create_rgctx_lazy_fetch_trampoline (guint32 slot, MonoTrampInfo **info, gboolean aot)
389 int i, depth, index, njumps;
391 guint8 **rgctx_null_jumps;
392 MonoJumpInfo *ji = NULL;
393 GSList *unwind_ops = NULL;
397 is_mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
398 index = MONO_RGCTX_SLOT_INDEX (slot);
400 index += MONO_SIZEOF_METHOD_RUNTIME_GENERIC_CONTEXT / sizeof (gpointer);
401 for (depth = 0; ; ++depth) {
402 int size = mono_class_rgctx_get_array_size (depth, is_mrgctx);
404 if (index < size - 1)
409 buf_size = 64 + 16 * depth;
410 code = buf = mono_global_codeman_reserve (buf_size);
412 rgctx_null_jumps = g_malloc0 (sizeof (guint8*) * (depth + 2));
415 /* The vtable/mrgtx is in R0 */
416 g_assert (MONO_ARCH_VTABLE_REG == ARMREG_R0);
420 arm_movx (code, ARMREG_IP1, ARMREG_R0);
422 /* load rgctx ptr from vtable */
423 code = mono_arm_emit_ldrx (code, ARMREG_IP1, ARMREG_R0, MONO_STRUCT_OFFSET (MonoVTable, runtime_generic_context));
424 /* is the rgctx ptr null? */
425 /* if yes, jump to actual trampoline */
426 rgctx_null_jumps [njumps ++] = code;
427 arm_cbzx (code, ARMREG_IP1, 0);
430 for (i = 0; i < depth; ++i) {
431 /* load ptr to next array */
432 if (is_mrgctx && i == 0) {
433 code = mono_arm_emit_ldrx (code, ARMREG_IP1, ARMREG_IP1, MONO_SIZEOF_METHOD_RUNTIME_GENERIC_CONTEXT);
435 code = mono_arm_emit_ldrx (code, ARMREG_IP1, ARMREG_IP1, 0);
437 /* is the ptr null? */
438 /* if yes, jump to actual trampoline */
439 rgctx_null_jumps [njumps ++] = code;
440 arm_cbzx (code, ARMREG_IP1, 0);
444 code = mono_arm_emit_ldrx (code, ARMREG_IP1, ARMREG_IP1, sizeof (gpointer) * (index + 1));
445 /* is the slot null? */
446 /* if yes, jump to actual trampoline */
447 rgctx_null_jumps [njumps ++] = code;
448 arm_cbzx (code, ARMREG_IP1, 0);
449 /* otherwise return, result is in IP1 */
450 arm_movx (code, ARMREG_R0, ARMREG_IP1);
451 arm_brx (code, ARMREG_LR);
453 g_assert (njumps <= depth + 2);
454 for (i = 0; i < njumps; ++i)
455 mono_arm_patch (rgctx_null_jumps [i], code, MONO_R_ARM64_CBZ);
457 g_free (rgctx_null_jumps);
461 /* Call mono_rgctx_lazy_fetch_trampoline (), passing in the slot as argument */
462 /* The vtable/mrgctx is still in R0 */
464 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));
466 tramp = mono_arch_create_specific_trampoline (GUINT_TO_POINTER (slot), MONO_TRAMPOLINE_RGCTX_LAZY_FETCH, mono_get_root_domain (), &code_len);
467 code = mono_arm_emit_imm64 (code, ARMREG_IP0, (guint64)tramp);
469 arm_brx (code, ARMREG_IP0);
471 mono_arch_flush_icache (buf, code - buf);
473 g_assert (code - buf <= buf_size);
476 char *name = mono_get_rgctx_fetch_trampoline_name (slot);
477 *info = mono_tramp_info_create (name, buf, code - buf, ji, unwind_ops);
485 mono_arch_create_general_rgctx_lazy_fetch_trampoline (MonoTrampInfo **info, gboolean aot)
489 MonoJumpInfo *ji = NULL;
490 GSList *unwind_ops = NULL;
496 code = buf = mono_global_codeman_reserve (tramp_size);
498 mono_add_unwind_op_def_cfa (unwind_ops, code, buf, ARMREG_SP, 0);
500 // FIXME: Currently, we always go to the slow path.
501 /* Load trampoline addr */
502 arm_ldrx (code, ARMREG_IP0, MONO_ARCH_RGCTX_REG, 8);
503 /* The vtable/mrgctx is in R0 */
504 g_assert (MONO_ARCH_VTABLE_REG == ARMREG_R0);
505 arm_brx (code, ARMREG_IP0);
507 mono_arch_flush_icache (buf, code - buf);
509 g_assert (code - buf <= tramp_size);
512 *info = mono_tramp_info_create ("rgctx_fetch_trampoline_general", buf, code - buf, ji, unwind_ops);
518 mono_arch_create_handler_block_trampoline (MonoTrampInfo **info, gboolean aot)
523 MonoJumpInfo *ji = NULL;
524 GSList *unwind_ops = NULL;
526 code = buf = mono_global_codeman_reserve (tramp_size);
531 This trampoline restore the call chain of the handler block then jumps into the code that deals with it.
535 * We are in a method frame after the call emitted by OP_CALL_HANDLER.
538 code = mono_arm_emit_aotconst (&ji, code, buf, ARMREG_IP0, MONO_PATCH_INFO_JIT_ICALL_ADDR, "mono_arm_handler_block_trampoline_helper");
540 code = mono_arm_emit_imm64 (code, ARMREG_IP0, (guint64)mono_arm_handler_block_trampoline_helper);
541 /* Set it as the return address so the trampoline will return to it */
542 arm_movx (code, ARMREG_LR, ARMREG_IP0);
544 /* Call the trampoline */
546 char *name = g_strdup_printf ("trampoline_func_%d", MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD);
547 code = mono_arm_emit_aotconst (&ji, code, buf, ARMREG_IP0, MONO_PATCH_INFO_JIT_ICALL_ADDR, name);
549 tramp = mono_arch_create_specific_trampoline (NULL, MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD, NULL, NULL);
550 code = mono_arm_emit_imm64 (code, ARMREG_IP0, (guint64)tramp);
552 arm_brx (code, ARMREG_IP0);
554 mono_arch_flush_icache (buf, code - buf);
555 mono_profiler_code_buffer_new (buf, code - buf, MONO_PROFILER_CODE_BUFFER_HELPER, NULL);
556 g_assert (code - buf <= tramp_size);
558 *info = mono_tramp_info_create ("handler_block_trampoline", buf, code - buf, ji, unwind_ops);
564 * mono_arch_create_sdb_trampoline:
566 * Return a trampoline which captures the current context, passes it to
567 * debugger_agent_single_step_from_context ()/debugger_agent_breakpoint_from_context (),
568 * then restores the (potentially changed) context.
571 mono_arch_create_sdb_trampoline (gboolean single_step, MonoTrampInfo **info, gboolean aot)
573 int tramp_size = 512;
574 int offset, imm, frame_size, ctx_offset;
575 guint64 gregs_regset;
577 GSList *unwind_ops = NULL;
578 MonoJumpInfo *ji = NULL;
580 code = buf = mono_global_codeman_reserve (tramp_size);
582 /* Compute stack frame size and offsets */
588 offset += sizeof (MonoContext);
589 offset = ALIGN_TO (offset, MONO_ARCH_FRAME_ALIGNMENT);
592 // FIXME: Unwind info
594 /* Setup stack frame */
597 arm_subx_imm (code, ARMREG_SP, ARMREG_SP, 256);
600 arm_subx_imm (code, ARMREG_SP, ARMREG_SP, imm);
601 arm_stpx (code, ARMREG_FP, ARMREG_LR, ARMREG_SP, 0);
602 arm_movspx (code, ARMREG_FP, ARMREG_SP);
604 /* Initialize a MonoContext structure on the stack */
605 /* No need to save fregs */
606 gregs_regset = ~((1 << ARMREG_FP) | (1 << ARMREG_SP));
607 code = mono_arm_emit_store_regarray (code, gregs_regset, ARMREG_FP, ctx_offset + G_STRUCT_OFFSET (MonoContext, regs));
609 arm_ldrx (code, ARMREG_IP1, ARMREG_FP, 0);
610 arm_strx (code, ARMREG_IP1, ARMREG_FP, ctx_offset + G_STRUCT_OFFSET (MonoContext, regs) + (ARMREG_FP * 8));
612 arm_movx (code, ARMREG_IP1, ARMREG_FP);
615 arm_addx_imm (code, ARMREG_IP1, ARMREG_IP1, 256);
618 arm_addx_imm (code, ARMREG_IP1, ARMREG_IP1, imm);
619 arm_strx (code, ARMREG_IP1, ARMREG_FP, ctx_offset + G_STRUCT_OFFSET (MonoContext, regs) + (ARMREG_SP * 8));
621 arm_ldrx (code, ARMREG_IP1, ARMREG_FP, 8);
622 arm_strx (code, ARMREG_IP1, ARMREG_FP, ctx_offset + G_STRUCT_OFFSET (MonoContext, pc));
624 /* Call the single step/breakpoint function in sdb */
626 arm_addx_imm (code, ARMREG_R0, ARMREG_FP, ctx_offset);
629 code = mono_arm_emit_aotconst (&ji, code, buf, ARMREG_IP0, MONO_PATCH_INFO_JIT_ICALL_ADDR, "debugger_agent_single_step_from_context");
631 code = mono_arm_emit_aotconst (&ji, code, buf, ARMREG_IP0, MONO_PATCH_INFO_JIT_ICALL_ADDR, "debugger_agent_breakpoint_from_context");
633 gpointer addr = single_step ? debugger_agent_single_step_from_context : debugger_agent_breakpoint_from_context;
635 code = mono_arm_emit_imm64 (code, ARMREG_IP0, (guint64)addr);
637 arm_blrx (code, ARMREG_IP0);
640 /* Save fp/pc into the frame block */
641 arm_ldrx (code, ARMREG_IP0, ARMREG_FP, ctx_offset + G_STRUCT_OFFSET (MonoContext, regs) + (ARMREG_FP * 8));
642 arm_strx (code, ARMREG_IP0, ARMREG_FP, 0);
643 arm_ldrx (code, ARMREG_IP0, ARMREG_FP, ctx_offset + G_STRUCT_OFFSET (MonoContext, pc));
644 arm_strx (code, ARMREG_IP0, ARMREG_FP, 8);
645 gregs_regset = ~((1 << ARMREG_FP) | (1 << ARMREG_SP));
646 code = mono_arm_emit_load_regarray (code, gregs_regset, ARMREG_FP, ctx_offset + G_STRUCT_OFFSET (MonoContext, regs));
648 code = mono_arm_emit_destroy_frame (code, frame_size, ((1 << ARMREG_IP0) | (1 << ARMREG_IP1)));
650 arm_retx (code, ARMREG_LR);
652 mono_arch_flush_icache (code, code - buf);
653 g_assert (code - buf <= tramp_size);
655 const char *tramp_name = single_step ? "sdb_single_step_trampoline" : "sdb_breakpoint_trampoline";
656 *info = mono_tramp_info_create (tramp_name, buf, code - buf, ji, unwind_ops);
661 #else /* DISABLE_JIT */
664 mono_arch_create_generic_trampoline (MonoTrampolineType tramp_type, MonoTrampInfo **info, gboolean aot)
666 g_assert_not_reached ();
671 mono_arch_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
673 g_assert_not_reached ();
678 mono_arch_create_handler_block_trampoline (MonoTrampInfo **info, gboolean aot)
680 g_assert_not_reached ();
685 mono_arch_get_unbox_trampoline (MonoMethod *m, gpointer addr)
687 g_assert_not_reached ();
692 mono_arch_get_static_rgctx_trampoline (MonoMethod *m, MonoMethodRuntimeGenericContext *mrgctx, gpointer addr)
694 g_assert_not_reached ();
699 mono_arch_create_rgctx_lazy_fetch_trampoline (guint32 slot, MonoTrampInfo **info, gboolean aot)
701 g_assert_not_reached ();
706 mono_arch_get_nullified_class_init_trampoline (MonoTrampInfo **info)
708 g_assert_not_reached ();
713 mono_arch_create_sdb_trampoline (gboolean single_step, MonoTrampInfo **info, gboolean aot)
715 g_assert_not_reached ();
719 #endif /* !DISABLE_JIT */