2 * exceptions-amd64.c: exception support for AMD64
5 * Dietmar Maurer (dietmar@ximian.com)
7 * (C) 2001 Ximian, Inc.
14 #ifdef HAVE_UCONTEXT_H
18 #include <mono/arch/amd64/amd64-codegen.h>
19 #include <mono/metadata/appdomain.h>
20 #include <mono/metadata/tabledefs.h>
21 #include <mono/metadata/threads.h>
22 #include <mono/metadata/threads-types.h>
23 #include <mono/metadata/debug-helpers.h>
24 #include <mono/metadata/exception.h>
25 #include <mono/metadata/gc-internal.h>
26 #include <mono/metadata/mono-debug.h>
27 #include <mono/utils/mono-mmap.h>
30 #include "mini-amd64.h"
32 #include "debug-mini.h"
34 #define ALIGN_TO(val,align) (((val) + ((align) - 1)) & ~((align) - 1))
37 static MonoW32ExceptionHandler fpe_handler;
38 static MonoW32ExceptionHandler ill_handler;
39 static MonoW32ExceptionHandler segv_handler;
41 static LPTOP_LEVEL_EXCEPTION_FILTER old_handler;
43 #define W32_SEH_HANDLE_EX(_ex) \
44 if (_ex##_handler) _ex##_handler(0, er, sctx)
47 * Unhandled Exception Filter
48 * Top-level per-process exception handler.
50 LONG CALLBACK seh_handler(EXCEPTION_POINTERS* ep)
57 res = EXCEPTION_CONTINUE_EXECUTION;
59 er = ep->ExceptionRecord;
60 ctx = ep->ContextRecord;
61 sctx = g_malloc(sizeof(MonoContext));
63 /* Copy Win32 context to UNIX style context */
78 switch (er->ExceptionCode) {
79 case EXCEPTION_ACCESS_VIOLATION:
80 W32_SEH_HANDLE_EX(segv);
82 case EXCEPTION_ILLEGAL_INSTRUCTION:
83 W32_SEH_HANDLE_EX(ill);
85 case EXCEPTION_INT_DIVIDE_BY_ZERO:
86 case EXCEPTION_INT_OVERFLOW:
87 case EXCEPTION_FLT_DIVIDE_BY_ZERO:
88 case EXCEPTION_FLT_OVERFLOW:
89 case EXCEPTION_FLT_UNDERFLOW:
90 case EXCEPTION_FLT_INEXACT_RESULT:
91 W32_SEH_HANDLE_EX(fpe);
97 /* Copy context back */
100 ctx->Rdi = sctx->rdi;
101 ctx->Rsi = sctx->rsi;
102 ctx->Rbx = sctx->rbx;
103 ctx->Rbp = sctx->rbp;
104 ctx->R12 = sctx->r12;
105 ctx->R13 = sctx->r13;
106 ctx->R14 = sctx->r14;
107 ctx->R15 = sctx->r15;
108 ctx->Rip = sctx->rip;
110 /* Volatile But should not matter?*/
111 ctx->Rax = sctx->rax;
112 ctx->Rcx = sctx->rcx;
113 ctx->Rdx = sctx->rdx;
120 void win32_seh_init()
122 old_handler = SetUnhandledExceptionFilter(seh_handler);
125 void win32_seh_cleanup()
127 if (old_handler) SetUnhandledExceptionFilter(old_handler);
130 void win32_seh_set_handler(int type, MonoW32ExceptionHandler handler)
134 fpe_handler = handler;
137 ill_handler = handler;
140 segv_handler = handler;
147 #endif /* TARGET_WIN32 */
150 * mono_arch_get_restore_context:
152 * Returns a pointer to a method which restores a previously saved sigcontext.
155 mono_arch_get_restore_context (MonoTrampInfo **info, gboolean aot)
157 guint8 *start = NULL;
159 MonoJumpInfo *ji = NULL;
160 GSList *unwind_ops = NULL;
162 /* restore_contect (MonoContext *ctx) */
164 start = code = mono_global_codeman_reserve (256);
166 amd64_mov_reg_reg (code, AMD64_R11, AMD64_ARG_REG1, 8);
168 /* Restore all registers except %rip and %r11 */
169 amd64_mov_reg_membase (code, AMD64_RAX, AMD64_R11, G_STRUCT_OFFSET (MonoContext, rax), 8);
170 amd64_mov_reg_membase (code, AMD64_RCX, AMD64_R11, G_STRUCT_OFFSET (MonoContext, rcx), 8);
171 amd64_mov_reg_membase (code, AMD64_RDX, AMD64_R11, G_STRUCT_OFFSET (MonoContext, rdx), 8);
172 amd64_mov_reg_membase (code, AMD64_RBX, AMD64_R11, G_STRUCT_OFFSET (MonoContext, rbx), 8);
173 amd64_mov_reg_membase (code, AMD64_RBP, AMD64_R11, G_STRUCT_OFFSET (MonoContext, rbp), 8);
174 amd64_mov_reg_membase (code, AMD64_RSI, AMD64_R11, G_STRUCT_OFFSET (MonoContext, rsi), 8);
175 amd64_mov_reg_membase (code, AMD64_RDI, AMD64_R11, G_STRUCT_OFFSET (MonoContext, rdi), 8);
176 //amd64_mov_reg_membase (code, AMD64_R8, AMD64_R11, G_STRUCT_OFFSET (MonoContext, r8), 8);
177 //amd64_mov_reg_membase (code, AMD64_R9, AMD64_R11, G_STRUCT_OFFSET (MonoContext, r9), 8);
178 //amd64_mov_reg_membase (code, AMD64_R10, AMD64_R11, G_STRUCT_OFFSET (MonoContext, r10), 8);
179 amd64_mov_reg_membase (code, AMD64_R12, AMD64_R11, G_STRUCT_OFFSET (MonoContext, r12), 8);
180 amd64_mov_reg_membase (code, AMD64_R13, AMD64_R11, G_STRUCT_OFFSET (MonoContext, r13), 8);
181 amd64_mov_reg_membase (code, AMD64_R14, AMD64_R11, G_STRUCT_OFFSET (MonoContext, r14), 8);
182 amd64_mov_reg_membase (code, AMD64_R15, AMD64_R11, G_STRUCT_OFFSET (MonoContext, r15), 8);
184 if (mono_running_on_valgrind ()) {
185 /* Prevent 'Address 0x... is just below the stack ptr.' errors */
186 amd64_mov_reg_membase (code, AMD64_R8, AMD64_R11, G_STRUCT_OFFSET (MonoContext, rsp), 8);
187 amd64_mov_reg_membase (code, AMD64_R11, AMD64_R11, G_STRUCT_OFFSET (MonoContext, rip), 8);
188 amd64_mov_reg_reg (code, AMD64_RSP, AMD64_R8, 8);
190 amd64_mov_reg_membase (code, AMD64_RSP, AMD64_R11, G_STRUCT_OFFSET (MonoContext, rsp), 8);
191 /* get return address */
192 amd64_mov_reg_membase (code, AMD64_R11, AMD64_R11, G_STRUCT_OFFSET (MonoContext, rip), 8);
195 /* jump to the saved IP */
196 amd64_jump_reg (code, AMD64_R11);
198 mono_arch_flush_icache (start, code - start);
201 *info = mono_tramp_info_create (g_strdup_printf ("restore_context"), start, code - start, ji, unwind_ops);
207 * mono_arch_get_call_filter:
209 * Returns a pointer to a method which calls an exception filter. We
210 * also use this function to call finally handlers (we pass NULL as
211 * @exc object in this case).
214 mono_arch_get_call_filter (MonoTrampInfo **info, gboolean aot)
220 MonoJumpInfo *ji = NULL;
221 GSList *unwind_ops = NULL;
223 start = code = mono_global_codeman_reserve (128);
225 /* call_filter (MonoContext *ctx, unsigned long eip) */
228 /* Alloc new frame */
229 amd64_push_reg (code, AMD64_RBP);
230 amd64_mov_reg_reg (code, AMD64_RBP, AMD64_RSP, 8);
232 /* Save callee saved regs */
234 for (i = 0; i < AMD64_NREG; ++i)
235 if (AMD64_IS_CALLEE_SAVED_REG (i)) {
236 amd64_push_reg (code, i);
242 amd64_push_reg (code, AMD64_RBP);
244 /* Make stack misaligned, the call will make it aligned again */
246 amd64_alu_reg_imm (code, X86_SUB, AMD64_RSP, 8);
249 amd64_mov_reg_membase (code, AMD64_RBP, AMD64_ARG_REG1, G_STRUCT_OFFSET (MonoContext, rbp), 8);
250 /* load callee saved regs */
251 amd64_mov_reg_membase (code, AMD64_RBX, AMD64_ARG_REG1, G_STRUCT_OFFSET (MonoContext, rbx), 8);
252 amd64_mov_reg_membase (code, AMD64_R12, AMD64_ARG_REG1, G_STRUCT_OFFSET (MonoContext, r12), 8);
253 amd64_mov_reg_membase (code, AMD64_R13, AMD64_ARG_REG1, G_STRUCT_OFFSET (MonoContext, r13), 8);
254 amd64_mov_reg_membase (code, AMD64_R14, AMD64_ARG_REG1, G_STRUCT_OFFSET (MonoContext, r14), 8);
255 amd64_mov_reg_membase (code, AMD64_R15, AMD64_ARG_REG1, G_STRUCT_OFFSET (MonoContext, r15), 8);
257 amd64_mov_reg_membase (code, AMD64_RDI, AMD64_ARG_REG1, G_STRUCT_OFFSET (MonoContext, rdi), 8);
258 amd64_mov_reg_membase (code, AMD64_RSI, AMD64_ARG_REG1, G_STRUCT_OFFSET (MonoContext, rsi), 8);
261 /* call the handler */
262 amd64_call_reg (code, AMD64_ARG_REG2);
265 amd64_alu_reg_imm (code, X86_ADD, AMD64_RSP, 8);
268 amd64_pop_reg (code, AMD64_RBP);
270 /* Restore callee saved regs */
271 for (i = AMD64_NREG; i >= 0; --i)
272 if (AMD64_IS_CALLEE_SAVED_REG (i))
273 amd64_pop_reg (code, i);
278 g_assert ((code - start) < 128);
280 mono_arch_flush_icache (start, code - start);
283 *info = mono_tramp_info_create (g_strdup_printf ("call_filter"), start, code - start, ji, unwind_ops);
289 * The first few arguments are dummy, to force the other arguments to be passed on
290 * the stack, this avoids overwriting the argument registers in the throw trampoline.
293 mono_amd64_throw_exception (guint64 dummy1, guint64 dummy2, guint64 dummy3, guint64 dummy4,
294 guint64 dummy5, guint64 dummy6,
295 MonoObject *exc, guint64 rip, guint64 rsp,
296 guint64 rbx, guint64 rbp, guint64 r12, guint64 r13,
297 guint64 r14, guint64 r15, guint64 rdi, guint64 rsi,
298 guint64 rax, guint64 rcx, guint64 rdx,
301 static void (*restore_context) (MonoContext *);
304 if (!restore_context)
305 restore_context = mono_get_restore_context ();
321 if (mono_object_isinst (exc, mono_defaults.exception_class)) {
322 MonoException *mono_ex = (MonoException*)exc;
324 mono_ex->stack_trace = NULL;
327 if (mono_debug_using_mono_debugger ()) {
328 guint8 buf [16], *code;
330 mono_breakpoint_clean_code (NULL, (gpointer)rip, 8, buf, sizeof (buf));
333 if (buf [3] == 0xe8) {
334 MonoContext ctx_cp = ctx;
335 ctx_cp.rip = rip - 5;
337 if (mono_debugger_handle_exception (&ctx_cp, exc)) {
338 restore_context (&ctx_cp);
339 g_assert_not_reached ();
344 /* adjust eip so that it point into the call instruction */
347 mono_handle_exception (&ctx, exc, (gpointer)rip, FALSE);
348 restore_context (&ctx);
350 g_assert_not_reached ();
354 mono_amd64_throw_corlib_exception (guint64 dummy1, guint64 dummy2, guint64 dummy3, guint64 dummy4,
355 guint64 dummy5, guint64 dummy6,
356 guint32 ex_token_index,
357 guint64 rip, guint64 rsp,
358 guint64 rbx, guint64 rbp, guint64 r12, guint64 r13,
359 guint64 r14, guint64 r15, guint64 rdi, guint64 rsi,
360 guint64 rax, guint64 rcx, guint64 rdx,
363 guint32 ex_token = MONO_TOKEN_TYPE_DEF | ex_token_index;
366 ex = mono_exception_from_token (mono_defaults.exception_class->image, ex_token);
370 mono_amd64_throw_exception (dummy1, dummy2, dummy3, dummy4, dummy5, dummy6, (MonoObject*)ex, rip, rsp, rbx, rbp, r12, r13, r14, r15, rdi, rsi, rax, rcx, rdx, FALSE);
374 * get_throw_trampoline:
376 * Generate a call to mono_amd64_throw_exception/
377 * mono_amd64_throw_corlib_exception.
380 get_throw_trampoline (MonoTrampInfo **info, gboolean rethrow, gboolean corlib, gboolean aot)
384 MonoJumpInfo *ji = NULL;
385 GSList *unwind_ops = NULL;
387 start = code = mono_global_codeman_reserve (64);
391 unwind_ops = mono_arch_get_cie_program ();
393 amd64_mov_reg_reg (code, AMD64_R11, AMD64_RSP, 8);
397 amd64_push_reg (code, AMD64_ARG_REG2);
399 amd64_push_imm (code, rethrow);
400 amd64_push_reg (code, AMD64_RDX);
401 amd64_push_reg (code, AMD64_RCX);
402 amd64_push_reg (code, AMD64_RAX);
403 amd64_push_reg (code, AMD64_RSI);
404 amd64_push_reg (code, AMD64_RDI);
405 amd64_push_reg (code, AMD64_R15);
406 amd64_push_reg (code, AMD64_R14);
407 amd64_push_reg (code, AMD64_R13);
408 amd64_push_reg (code, AMD64_R12);
409 amd64_push_reg (code, AMD64_RBP);
410 amd64_push_reg (code, AMD64_RBX);
413 amd64_lea_membase (code, AMD64_RAX, AMD64_R11, 8);
414 amd64_push_reg (code, AMD64_RAX);
417 amd64_push_membase (code, AMD64_R11, 0);
421 amd64_push_reg (code, AMD64_ARG_REG1);
424 amd64_push_reg (code, AMD64_ARG_REG1);
426 mono_add_unwind_op_def_cfa_offset (unwind_ops, code, start, (15 + 1) * sizeof (gpointer));
430 amd64_push_imm (code, 0);
431 amd64_push_imm (code, 0);
432 amd64_push_imm (code, 0);
433 amd64_push_imm (code, 0);
434 amd64_push_imm (code, 0);
435 amd64_push_imm (code, 0);
439 ji = mono_patch_info_list_prepend (ji, code - start, MONO_PATCH_INFO_JIT_ICALL_ADDR, corlib ? "mono_amd64_throw_corlib_exception" : "mono_amd64_throw_exception");
440 amd64_mov_reg_membase (code, AMD64_R11, AMD64_RIP, 0, 8);
442 amd64_mov_reg_imm (code, AMD64_R11, corlib ? (gpointer)mono_amd64_throw_corlib_exception : (gpointer)mono_amd64_throw_exception);
444 amd64_call_reg (code, AMD64_R11);
445 amd64_breakpoint (code);
447 mono_arch_flush_icache (start, code - start);
449 g_assert ((code - start) < 64);
451 mono_save_trampoline_xdebug_info ("throw_exception_trampoline", start, code - start, unwind_ops);
454 *info = mono_tramp_info_create (g_strdup_printf (corlib ? "throw_corlib_exception" : (rethrow ? "rethrow_exception" : "throw_exception")), start, code - start, ji, unwind_ops);
460 * mono_arch_get_throw_exception:
462 * Returns a function pointer which can be used to raise
463 * exceptions. The returned function has the following
464 * signature: void (*func) (MonoException *exc);
468 mono_arch_get_throw_exception (MonoTrampInfo **info, gboolean aot)
470 return get_throw_trampoline (info, FALSE, FALSE, aot);
474 mono_arch_get_rethrow_exception (MonoTrampInfo **info, gboolean aot)
476 return get_throw_trampoline (info, TRUE, FALSE, aot);
480 * mono_arch_get_throw_corlib_exception:
482 * Returns a function pointer which can be used to raise
483 * corlib exceptions. The returned function has the following
484 * signature: void (*func) (guint32 ex_token, guint32 offset);
485 * Here, offset is the offset which needs to be substracted from the caller IP
486 * to get the IP of the throw. Passing the offset has the advantage that it
487 * needs no relocations in the caller.
490 mono_arch_get_throw_corlib_exception (MonoTrampInfo **info, gboolean aot)
492 return get_throw_trampoline (info, FALSE, TRUE, aot);
496 * mono_arch_find_jit_info_ext:
498 * This function is used to gather information from @ctx, and store it in @frame_info.
499 * It unwinds one stack frame, and stores the resulting context into @new_ctx. @lmf
500 * is modified if needed.
501 * Returns TRUE on success, FALSE otherwise.
502 * This function is a version of mono_arch_find_jit_info () where all the results are
503 * returned in a StackFrameInfo structure.
506 mono_arch_find_jit_info_ext (MonoDomain *domain, MonoJitTlsData *jit_tls,
507 MonoJitInfo *ji, MonoContext *ctx,
508 MonoContext *new_ctx, MonoLMF **lmf,
509 StackFrameInfo *frame)
511 gpointer ip = MONO_CONTEXT_GET_IP (ctx);
513 memset (frame, 0, sizeof (StackFrameInfo));
515 frame->managed = FALSE;
520 gssize regs [MONO_MAX_IREGS + 1];
522 guint32 unwind_info_len;
525 frame->type = FRAME_TYPE_MANAGED;
527 if (!ji->method->wrapper_type || ji->method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD)
528 frame->managed = TRUE;
531 unwind_info = mono_aot_get_unwind_info (ji, &unwind_info_len);
533 unwind_info = mono_get_cached_unwind_info (ji->used_regs, &unwind_info_len);
535 regs [AMD64_RAX] = new_ctx->rax;
536 regs [AMD64_RBX] = new_ctx->rbx;
537 regs [AMD64_RCX] = new_ctx->rcx;
538 regs [AMD64_RDX] = new_ctx->rdx;
539 regs [AMD64_RBP] = new_ctx->rbp;
540 regs [AMD64_RSP] = new_ctx->rsp;
541 regs [AMD64_RSI] = new_ctx->rsi;
542 regs [AMD64_RDI] = new_ctx->rdi;
543 regs [AMD64_RIP] = new_ctx->rip;
544 regs [AMD64_R12] = new_ctx->r12;
545 regs [AMD64_R13] = new_ctx->r13;
546 regs [AMD64_R14] = new_ctx->r14;
547 regs [AMD64_R15] = new_ctx->r15;
549 mono_unwind_frame (unwind_info, unwind_info_len, ji->code_start,
550 (guint8*)ji->code_start + ji->code_size,
551 ip, regs, MONO_MAX_IREGS + 1, &cfa);
553 new_ctx->rax = regs [AMD64_RAX];
554 new_ctx->rbx = regs [AMD64_RBX];
555 new_ctx->rcx = regs [AMD64_RCX];
556 new_ctx->rdx = regs [AMD64_RDX];
557 new_ctx->rbp = regs [AMD64_RBP];
558 new_ctx->rsp = regs [AMD64_RSP];
559 new_ctx->rsi = regs [AMD64_RSI];
560 new_ctx->rdi = regs [AMD64_RDI];
561 new_ctx->rip = regs [AMD64_RIP];
562 new_ctx->r12 = regs [AMD64_R12];
563 new_ctx->r13 = regs [AMD64_R13];
564 new_ctx->r14 = regs [AMD64_R14];
565 new_ctx->r15 = regs [AMD64_R15];
567 /* The CFA becomes the new SP value */
568 new_ctx->rsp = (gssize)cfa;
573 if (*lmf && ((*lmf) != jit_tls->first_lmf) && (MONO_CONTEXT_GET_SP (ctx) >= (gpointer)(*lmf)->rsp)) {
574 /* remove any unused lmf */
575 *lmf = (gpointer)(((guint64)(*lmf)->previous_lmf) & ~3);
578 #ifndef MONO_AMD64_NO_PUSHES
579 /* Pop arguments off the stack */
581 MonoJitArgumentInfo *arg_info = g_newa (MonoJitArgumentInfo, mono_method_signature (ji->method)->param_count + 1);
583 guint32 stack_to_pop = mono_arch_get_argument_info (mono_method_signature (ji->method), mono_method_signature (ji->method)->param_count, arg_info);
584 new_ctx->rsp += stack_to_pop;
592 if (((guint64)(*lmf)->previous_lmf) & 2) {
594 * This LMF entry is created by the soft debug code to mark transitions to
595 * managed code done during invokes.
597 MonoLMFExt *ext = (MonoLMFExt*)(*lmf);
599 g_assert (ext->debugger_invoke);
601 memcpy (new_ctx, &ext->ctx, sizeof (MonoContext));
603 *lmf = (gpointer)(((guint64)(*lmf)->previous_lmf) & ~3);
605 frame->type = FRAME_TYPE_DEBUGGER_INVOKE;
610 if (((guint64)(*lmf)->previous_lmf) & 1) {
611 /* This LMF has the rip field set */
613 } else if ((*lmf)->rsp == 0) {
618 * The rsp field is set just before the call which transitioned to native
619 * code. Obtain the rip from the stack.
621 rip = *(guint64*)((*lmf)->rsp - sizeof (gpointer));
624 ji = mini_jit_info_table_find (domain, (gpointer)rip, NULL);
626 // FIXME: This can happen with multiple appdomains (bug #444383)
634 frame->type = FRAME_TYPE_MANAGED_TO_NATIVE;
637 new_ctx->rbp = (*lmf)->rbp;
638 new_ctx->rsp = (*lmf)->rsp;
640 new_ctx->rbx = (*lmf)->rbx;
641 new_ctx->r12 = (*lmf)->r12;
642 new_ctx->r13 = (*lmf)->r13;
643 new_ctx->r14 = (*lmf)->r14;
644 new_ctx->r15 = (*lmf)->r15;
646 new_ctx->rdi = (*lmf)->rdi;
647 new_ctx->rsi = (*lmf)->rsi;
650 *lmf = (gpointer)(((guint64)(*lmf)->previous_lmf) & ~3);
661 * Called by resuming from a signal handler.
664 handle_signal_exception (gpointer obj, gboolean test_only)
666 MonoJitTlsData *jit_tls = TlsGetValue (mono_jit_tls_id);
668 static void (*restore_context) (MonoContext *);
670 if (!restore_context)
671 restore_context = mono_get_restore_context ();
673 memcpy (&ctx, &jit_tls->ex_ctx, sizeof (MonoContext));
675 if (mono_debugger_handle_exception (&ctx, (MonoObject *)obj))
678 mono_handle_exception (&ctx, obj, MONO_CONTEXT_GET_IP (&ctx), test_only);
680 restore_context (&ctx);
684 * mono_arch_handle_exception:
686 * @ctx: saved processor state
687 * @obj: the exception object
690 mono_arch_handle_exception (void *sigctx, gpointer obj, gboolean test_only)
692 #if defined(MONO_ARCH_USE_SIGACTION) && defined(UCONTEXT_GREGS)
694 * Handling the exception in the signal handler is problematic, since the original
695 * signal is disabled, and we could run arbitrary code though the debugger. So
696 * resume into the normal stack and do most work there if possible.
698 MonoJitTlsData *jit_tls = TlsGetValue (mono_jit_tls_id);
699 guint64 sp = UCONTEXT_REG_RSP (sigctx);
701 /* Pass the ctx parameter in TLS */
702 mono_arch_sigctx_to_monoctx (sigctx, &jit_tls->ex_ctx);
703 /* The others in registers */
704 UCONTEXT_REG_RDI (sigctx) = (guint64)obj;
705 UCONTEXT_REG_RSI (sigctx) = test_only;
707 /* Allocate a stack frame below the red zone */
709 /* The stack should be unaligned */
712 UCONTEXT_REG_RSP (sigctx) = sp;
714 UCONTEXT_REG_RIP (sigctx) = (guint64)handle_signal_exception;
720 mono_arch_sigctx_to_monoctx (sigctx, &mctx);
722 if (mono_debugger_handle_exception (&mctx, (MonoObject *)obj))
725 mono_handle_exception (&mctx, obj, MONO_CONTEXT_GET_IP (&mctx), test_only);
727 mono_arch_monoctx_to_sigctx (&mctx, sigctx);
733 #if defined(MONO_ARCH_USE_SIGACTION) && defined(UCONTEXT_GREGS)
734 static inline guint64*
735 gregs_from_ucontext (ucontext_t *ctx)
737 return (guint64 *) UCONTEXT_GREGS (ctx);
741 mono_arch_sigctx_to_monoctx (void *sigctx, MonoContext *mctx)
743 #if defined(MONO_ARCH_USE_SIGACTION)
744 ucontext_t *ctx = (ucontext_t*)sigctx;
746 mctx->rax = UCONTEXT_REG_RAX (ctx);
747 mctx->rbx = UCONTEXT_REG_RBX (ctx);
748 mctx->rcx = UCONTEXT_REG_RCX (ctx);
749 mctx->rdx = UCONTEXT_REG_RDX (ctx);
750 mctx->rbp = UCONTEXT_REG_RBP (ctx);
751 mctx->rsp = UCONTEXT_REG_RSP (ctx);
752 mctx->rsi = UCONTEXT_REG_RSI (ctx);
753 mctx->rdi = UCONTEXT_REG_RDI (ctx);
754 mctx->rip = UCONTEXT_REG_RIP (ctx);
755 mctx->r12 = UCONTEXT_REG_R12 (ctx);
756 mctx->r13 = UCONTEXT_REG_R13 (ctx);
757 mctx->r14 = UCONTEXT_REG_R14 (ctx);
758 mctx->r15 = UCONTEXT_REG_R15 (ctx);
760 MonoContext *ctx = (MonoContext *)sigctx;
762 mctx->rax = ctx->rax;
763 mctx->rbx = ctx->rbx;
764 mctx->rcx = ctx->rcx;
765 mctx->rdx = ctx->rdx;
766 mctx->rbp = ctx->rbp;
767 mctx->rsp = ctx->rsp;
768 mctx->rsi = ctx->rsi;
769 mctx->rdi = ctx->rdi;
770 mctx->rip = ctx->rip;
771 mctx->r12 = ctx->r12;
772 mctx->r13 = ctx->r13;
773 mctx->r14 = ctx->r14;
774 mctx->r15 = ctx->r15;
779 mono_arch_monoctx_to_sigctx (MonoContext *mctx, void *sigctx)
781 #if defined(MONO_ARCH_USE_SIGACTION)
782 ucontext_t *ctx = (ucontext_t*)sigctx;
784 UCONTEXT_REG_RAX (ctx) = mctx->rax;
785 UCONTEXT_REG_RBX (ctx) = mctx->rbx;
786 UCONTEXT_REG_RCX (ctx) = mctx->rcx;
787 UCONTEXT_REG_RDX (ctx) = mctx->rdx;
788 UCONTEXT_REG_RBP (ctx) = mctx->rbp;
789 UCONTEXT_REG_RSP (ctx) = mctx->rsp;
790 UCONTEXT_REG_RSI (ctx) = mctx->rsi;
791 UCONTEXT_REG_RDI (ctx) = mctx->rdi;
792 UCONTEXT_REG_RIP (ctx) = mctx->rip;
793 UCONTEXT_REG_R12 (ctx) = mctx->r12;
794 UCONTEXT_REG_R13 (ctx) = mctx->r13;
795 UCONTEXT_REG_R14 (ctx) = mctx->r14;
796 UCONTEXT_REG_R15 (ctx) = mctx->r15;
798 MonoContext *ctx = (MonoContext *)sigctx;
800 ctx->rax = mctx->rax;
801 ctx->rbx = mctx->rbx;
802 ctx->rcx = mctx->rcx;
803 ctx->rdx = mctx->rdx;
804 ctx->rbp = mctx->rbp;
805 ctx->rsp = mctx->rsp;
806 ctx->rsi = mctx->rsi;
807 ctx->rdi = mctx->rdi;
808 ctx->rip = mctx->rip;
809 ctx->r12 = mctx->r12;
810 ctx->r13 = mctx->r13;
811 ctx->r14 = mctx->r14;
812 ctx->r15 = mctx->r15;
817 mono_arch_ip_from_context (void *sigctx)
819 #if defined(MONO_ARCH_USE_SIGACTION)
820 ucontext_t *ctx = (ucontext_t*)sigctx;
822 return (gpointer)UCONTEXT_REG_RIP (ctx);
824 MonoContext *ctx = sigctx;
825 return (gpointer)ctx->rip;
830 restore_soft_guard_pages (void)
832 MonoJitTlsData *jit_tls = TlsGetValue (mono_jit_tls_id);
833 if (jit_tls->stack_ovf_guard_base)
834 mono_mprotect (jit_tls->stack_ovf_guard_base, jit_tls->stack_ovf_guard_size, MONO_MMAP_NONE);
838 * this function modifies mctx so that when it is restored, it
839 * won't execcute starting at mctx.eip, but in a function that
840 * will restore the protection on the soft-guard pages and return back to
841 * continue at mctx.eip.
844 prepare_for_guard_pages (MonoContext *mctx)
847 sp = (gpointer)(mctx->rsp);
849 /* the return addr */
850 sp [0] = (gpointer)(mctx->rip);
851 mctx->rip = (guint64)restore_soft_guard_pages;
852 mctx->rsp = (guint64)sp;
856 altstack_handle_and_restore (void *sigctx, gpointer obj, gboolean stack_ovf)
858 void (*restore_context) (MonoContext *);
861 restore_context = mono_get_restore_context ();
862 mono_arch_sigctx_to_monoctx (sigctx, &mctx);
864 if (mono_debugger_handle_exception (&mctx, (MonoObject *)obj)) {
866 prepare_for_guard_pages (&mctx);
867 restore_context (&mctx);
870 mono_handle_exception (&mctx, obj, MONO_CONTEXT_GET_IP (&mctx), FALSE);
872 prepare_for_guard_pages (&mctx);
873 restore_context (&mctx);
877 mono_arch_handle_altstack_exception (void *sigctx, gpointer fault_addr, gboolean stack_ovf)
879 #if defined(MONO_ARCH_USE_SIGACTION) && defined(UCONTEXT_GREGS)
880 MonoException *exc = NULL;
881 ucontext_t *ctx = (ucontext_t*)sigctx;
882 guint64 *gregs = gregs_from_ucontext (ctx);
883 MonoJitInfo *ji = mini_jit_info_table_find (mono_domain_get (), (gpointer)gregs [REG_RIP], NULL);
888 exc = mono_domain_get ()->stack_overflow_ex;
890 mono_handle_native_sigsegv (SIGSEGV, sigctx);
892 /* setup a call frame on the real stack so that control is returned there
893 * and exception handling can continue.
894 * The frame looks like:
898 * 128 is the size of the red zone
900 frame_size = sizeof (ucontext_t) + sizeof (gpointer) * 4 + 128;
903 sp = (gpointer)(gregs [REG_RSP] & ~15);
904 sp = (gpointer)((char*)sp - frame_size);
905 /* the arguments must be aligned */
906 sp [-1] = (gpointer)gregs [REG_RIP];
907 /* may need to adjust pointers in the new struct copy, depending on the OS */
908 memcpy (sp + 4, ctx, sizeof (ucontext_t));
909 /* at the return form the signal handler execution starts in altstack_handle_and_restore() */
910 gregs [REG_RIP] = (unsigned long)altstack_handle_and_restore;
911 gregs [REG_RSP] = (unsigned long)(sp - 1);
912 gregs [REG_RDI] = (unsigned long)(sp + 4);
913 gregs [REG_RSI] = (guint64)exc;
914 gregs [REG_RDX] = stack_ovf;
919 mono_amd64_get_original_ip (void)
921 MonoLMF *lmf = mono_get_lmf ();
925 /* Reset the change to previous_lmf */
926 lmf->previous_lmf = (gpointer)((guint64)lmf->previous_lmf & ~1);
932 mono_arch_get_throw_pending_exception (MonoTrampInfo **info, gboolean aot)
934 guint8 *code, *start;
936 gpointer throw_trampoline;
937 MonoJumpInfo *ji = NULL;
938 GSList *unwind_ops = NULL;
940 start = code = mono_global_codeman_reserve (128);
942 /* We are in the frame of a managed method after a call */
944 * We would like to throw the pending exception in such a way that it looks to
945 * be thrown from the managed method.
948 /* Save registers which might contain the return value of the call */
949 amd64_push_reg (code, AMD64_RAX);
950 amd64_push_reg (code, AMD64_RDX);
952 amd64_alu_reg_imm (code, X86_SUB, AMD64_RSP, 8);
953 amd64_movsd_membase_reg (code, AMD64_RSP, 0, AMD64_XMM0);
956 amd64_alu_reg_imm (code, X86_SUB, AMD64_RSP, 8);
958 /* Obtain the pending exception */
960 ji = mono_patch_info_list_prepend (ji, code - start, MONO_PATCH_INFO_JIT_ICALL_ADDR, "mono_thread_get_and_clear_pending_exception");
961 amd64_mov_reg_membase (code, AMD64_R11, AMD64_RIP, 0, 8);
963 amd64_mov_reg_imm (code, AMD64_R11, mono_thread_get_and_clear_pending_exception);
965 amd64_call_reg (code, AMD64_R11);
967 /* Check if it is NULL, and branch */
968 amd64_alu_reg_imm (code, X86_CMP, AMD64_RAX, 0);
969 br[0] = code; x86_branch8 (code, X86_CC_EQ, 0, FALSE);
971 /* exc != NULL branch */
973 /* Save the exc on the stack */
974 amd64_push_reg (code, AMD64_RAX);
976 amd64_alu_reg_imm (code, X86_SUB, AMD64_RSP, 8);
978 /* Obtain the original ip and clear the flag in previous_lmf */
980 ji = mono_patch_info_list_prepend (ji, code - start, MONO_PATCH_INFO_JIT_ICALL_ADDR, "mono_amd64_get_original_ip");
981 amd64_mov_reg_membase (code, AMD64_R11, AMD64_RIP, 0, 8);
983 amd64_mov_reg_imm (code, AMD64_R11, mono_amd64_get_original_ip);
985 amd64_call_reg (code, AMD64_R11);
988 amd64_mov_reg_membase (code, AMD64_R11, AMD64_RSP, 8, 8);
990 /* Pop saved stuff from the stack */
991 amd64_alu_reg_imm (code, X86_ADD, AMD64_RSP, 6 * 8);
993 /* Setup arguments for the throw trampoline */
995 amd64_mov_reg_reg (code, AMD64_ARG_REG1, AMD64_R11, 8);
996 /* The trampoline expects the caller ip to be pushed on the stack */
997 amd64_push_reg (code, AMD64_RAX);
999 /* Call the throw trampoline */
1001 ji = mono_patch_info_list_prepend (ji, code - start, MONO_PATCH_INFO_JIT_ICALL_ADDR, "mono_amd64_throw_exception");
1002 amd64_mov_reg_membase (code, AMD64_R11, AMD64_RIP, 0, 8);
1004 throw_trampoline = mono_get_throw_exception ();
1005 amd64_mov_reg_imm (code, AMD64_R11, throw_trampoline);
1007 /* We use a jump instead of a call so we can push the original ip on the stack */
1008 amd64_jump_reg (code, AMD64_R11);
1010 /* ex == NULL branch */
1011 mono_amd64_patch (br [0], code);
1013 /* Obtain the original ip and clear the flag in previous_lmf */
1015 ji = mono_patch_info_list_prepend (ji, code - start, MONO_PATCH_INFO_JIT_ICALL_ADDR, "mono_amd64_get_original_ip");
1016 amd64_mov_reg_membase (code, AMD64_R11, AMD64_RIP, 0, 8);
1018 amd64_mov_reg_imm (code, AMD64_R11, mono_amd64_get_original_ip);
1020 amd64_call_reg (code, AMD64_R11);
1021 amd64_mov_reg_reg (code, AMD64_R11, AMD64_RAX, 8);
1023 /* Restore registers */
1024 amd64_alu_reg_imm (code, X86_ADD, AMD64_RSP, 8);
1025 amd64_movsd_reg_membase (code, AMD64_XMM0, AMD64_RSP, 0);
1026 amd64_alu_reg_imm (code, X86_ADD, AMD64_RSP, 8);
1027 amd64_pop_reg (code, AMD64_RDX);
1028 amd64_pop_reg (code, AMD64_RAX);
1030 /* Return to original code */
1031 amd64_jump_reg (code, AMD64_R11);
1033 g_assert ((code - start) < 128);
1036 *info = mono_tramp_info_create (g_strdup_printf ("throw_pending_exception"), start, code - start, ji, unwind_ops);
1041 static gpointer throw_pending_exception;
1044 * Called when a thread receives an async exception while executing unmanaged code.
1045 * Instead of checking for this exception in the managed-to-native wrapper, we hijack
1046 * the return address on the stack to point to a helper routine which throws the
1050 mono_arch_notify_pending_exc (void)
1052 MonoLMF *lmf = mono_get_lmf ();
1055 /* Not yet started */
1062 if ((guint64)lmf->previous_lmf & 1)
1063 /* Already hijacked or trampoline LMF entry */
1066 /* lmf->rsp is set just before making the call which transitions to unmanaged code */
1067 lmf->rip = *(guint64*)(lmf->rsp - 8);
1068 /* Signal that lmf->rip is set */
1069 lmf->previous_lmf = (gpointer)((guint64)lmf->previous_lmf | 1);
1071 *(gpointer*)(lmf->rsp - 8) = throw_pending_exception;
1075 mono_arch_exceptions_init (void)
1077 if (mono_aot_only) {
1078 throw_pending_exception = mono_aot_get_trampoline ("throw_pending_exception");
1080 /* Call this to avoid initialization races */
1081 throw_pending_exception = mono_arch_get_throw_pending_exception (NULL, FALSE);
1088 * The mono_arch_unwindinfo* methods are used to build and add
1089 * function table info for each emitted method from mono. On Winx64
1090 * the seh handler will not be called if the mono methods are not
1091 * added to the function table.
1093 * We should not need to add non-volatile register info to the
1094 * table since mono stores that info elsewhere. (Except for the register
1098 #define MONO_MAX_UNWIND_CODES 22
1100 typedef union _UNWIND_CODE {
1103 guchar UnwindOp : 4;
1106 gushort FrameOffset;
1107 } UNWIND_CODE, *PUNWIND_CODE;
1109 typedef struct _UNWIND_INFO {
1112 guchar SizeOfProlog;
1113 guchar CountOfCodes;
1114 guchar FrameRegister : 4;
1115 guchar FrameOffset : 4;
1116 /* custom size for mono allowing for mono allowing for*/
1117 /*UWOP_PUSH_NONVOL ebp offset = 21*/
1118 /*UWOP_ALLOC_LARGE : requires 2 or 3 offset = 20*/
1119 /*UWOP_SET_FPREG : requires 2 offset = 17*/
1120 /*UWOP_PUSH_NONVOL offset = 15-0*/
1121 UNWIND_CODE UnwindCode[MONO_MAX_UNWIND_CODES];
1123 /* UNWIND_CODE MoreUnwindCode[((CountOfCodes + 1) & ~1) - 1];
1125 * OPTIONAL ULONG ExceptionHandler;
1126 * OPTIONAL ULONG FunctionEntry;
1128 * OPTIONAL ULONG ExceptionData[]; */
1129 } UNWIND_INFO, *PUNWIND_INFO;
1133 RUNTIME_FUNCTION runtimeFunction;
1134 UNWIND_INFO unwindInfo;
1135 } MonoUnwindInfo, *PMonoUnwindInfo;
1138 mono_arch_unwindinfo_create (gpointer* monoui)
1140 PMonoUnwindInfo newunwindinfo;
1141 *monoui = newunwindinfo = g_new0 (MonoUnwindInfo, 1);
1142 newunwindinfo->unwindInfo.Version = 1;
1146 mono_arch_unwindinfo_add_push_nonvol (gpointer* monoui, gpointer codebegin, gpointer nextip, guchar reg )
1148 PMonoUnwindInfo unwindinfo;
1149 PUNWIND_CODE unwindcode;
1152 mono_arch_unwindinfo_create (monoui);
1154 unwindinfo = (MonoUnwindInfo*)*monoui;
1156 if (unwindinfo->unwindInfo.CountOfCodes >= MONO_MAX_UNWIND_CODES)
1157 g_error ("Larger allocation needed for the unwind information.");
1159 codeindex = MONO_MAX_UNWIND_CODES - (++unwindinfo->unwindInfo.CountOfCodes);
1160 unwindcode = &unwindinfo->unwindInfo.UnwindCode[codeindex];
1161 unwindcode->UnwindOp = 0; /*UWOP_PUSH_NONVOL*/
1162 unwindcode->CodeOffset = (((guchar*)nextip)-((guchar*)codebegin));
1163 unwindcode->OpInfo = reg;
1165 if (unwindinfo->unwindInfo.SizeOfProlog >= unwindcode->CodeOffset)
1166 g_error ("Adding unwind info in wrong order.");
1168 unwindinfo->unwindInfo.SizeOfProlog = unwindcode->CodeOffset;
1172 mono_arch_unwindinfo_add_set_fpreg (gpointer* monoui, gpointer codebegin, gpointer nextip, guchar reg )
1174 PMonoUnwindInfo unwindinfo;
1175 PUNWIND_CODE unwindcode;
1178 mono_arch_unwindinfo_create (monoui);
1180 unwindinfo = (MonoUnwindInfo*)*monoui;
1182 if (unwindinfo->unwindInfo.CountOfCodes + 1 >= MONO_MAX_UNWIND_CODES)
1183 g_error ("Larger allocation needed for the unwind information.");
1185 codeindex = MONO_MAX_UNWIND_CODES - (unwindinfo->unwindInfo.CountOfCodes += 2);
1186 unwindcode = &unwindinfo->unwindInfo.UnwindCode[codeindex];
1187 unwindcode->FrameOffset = 0; /*Assuming no frame pointer offset for mono*/
1189 unwindcode->UnwindOp = 3; /*UWOP_SET_FPREG*/
1190 unwindcode->CodeOffset = (((guchar*)nextip)-((guchar*)codebegin));
1191 unwindcode->OpInfo = reg;
1193 unwindinfo->unwindInfo.FrameRegister = reg;
1195 if (unwindinfo->unwindInfo.SizeOfProlog >= unwindcode->CodeOffset)
1196 g_error ("Adding unwind info in wrong order.");
1198 unwindinfo->unwindInfo.SizeOfProlog = unwindcode->CodeOffset;
1202 mono_arch_unwindinfo_add_alloc_stack (gpointer* monoui, gpointer codebegin, gpointer nextip, guint size )
1204 PMonoUnwindInfo unwindinfo;
1205 PUNWIND_CODE unwindcode;
1209 mono_arch_unwindinfo_create (monoui);
1211 unwindinfo = (MonoUnwindInfo*)*monoui;
1214 g_error ("Stack allocation must be equal to or greater than 0x8.");
1218 else if (size <= 0x7FFF8)
1223 if (unwindinfo->unwindInfo.CountOfCodes + codesneeded > MONO_MAX_UNWIND_CODES)
1224 g_error ("Larger allocation needed for the unwind information.");
1226 codeindex = MONO_MAX_UNWIND_CODES - (unwindinfo->unwindInfo.CountOfCodes += codesneeded);
1227 unwindcode = &unwindinfo->unwindInfo.UnwindCode[codeindex];
1229 if (codesneeded == 1) {
1230 /*The size of the allocation is
1231 (the number in the OpInfo member) times 8 plus 8*/
1232 unwindcode->OpInfo = (size - 8)/8;
1233 unwindcode->UnwindOp = 2; /*UWOP_ALLOC_SMALL*/
1236 if (codesneeded == 3) {
1237 /*the unscaled size of the allocation is recorded
1238 in the next two slots in little-endian format*/
1239 *((unsigned int*)(&unwindcode->FrameOffset)) = size;
1241 unwindcode->OpInfo = 1;
1244 /*the size of the allocation divided by 8
1245 is recorded in the next slot*/
1246 unwindcode->FrameOffset = size/8;
1248 unwindcode->OpInfo = 0;
1251 unwindcode->UnwindOp = 1; /*UWOP_ALLOC_LARGE*/
1254 unwindcode->CodeOffset = (((guchar*)nextip)-((guchar*)codebegin));
1256 if (unwindinfo->unwindInfo.SizeOfProlog >= unwindcode->CodeOffset)
1257 g_error ("Adding unwind info in wrong order.");
1259 unwindinfo->unwindInfo.SizeOfProlog = unwindcode->CodeOffset;
1263 mono_arch_unwindinfo_get_size (gpointer monoui)
1265 PMonoUnwindInfo unwindinfo;
1269 unwindinfo = (MonoUnwindInfo*)monoui;
1270 return (8 + sizeof (MonoUnwindInfo)) -
1271 (sizeof (UNWIND_CODE) * (MONO_MAX_UNWIND_CODES - unwindinfo->unwindInfo.CountOfCodes));
1275 MONO_GET_RUNTIME_FUNCTION_CALLBACK ( DWORD64 ControlPc, IN PVOID Context )
1279 PMonoUnwindInfo targetinfo;
1280 MonoDomain *domain = mono_domain_get ();
1282 ji = mini_jit_info_table_find (domain, (char*)ControlPc, NULL);
1286 pos = (guint64)(((char*)ji->code_start) + ji->code_size);
1288 targetinfo = (PMonoUnwindInfo)ALIGN_TO (pos, 8);
1290 targetinfo->runtimeFunction.UnwindData = ((DWORD64)&targetinfo->unwindInfo) - ((DWORD64)Context);
1292 return &targetinfo->runtimeFunction;
1296 mono_arch_unwindinfo_install_unwind_info (gpointer* monoui, gpointer code, guint code_size)
1298 PMonoUnwindInfo unwindinfo, targetinfo;
1300 guint64 targetlocation;
1304 unwindinfo = (MonoUnwindInfo*)*monoui;
1305 targetlocation = (guint64)&(((guchar*)code)[code_size]);
1306 targetinfo = (PMonoUnwindInfo) ALIGN_TO(targetlocation, 8);
1308 unwindinfo->runtimeFunction.EndAddress = code_size;
1309 unwindinfo->runtimeFunction.UnwindData = ((guchar*)&targetinfo->unwindInfo) - ((guchar*)code);
1311 memcpy (targetinfo, unwindinfo, sizeof (MonoUnwindInfo) - (sizeof (UNWIND_CODE) * MONO_MAX_UNWIND_CODES));
1313 codecount = unwindinfo->unwindInfo.CountOfCodes;
1315 memcpy (&targetinfo->unwindInfo.UnwindCode[0], &unwindinfo->unwindInfo.UnwindCode[MONO_MAX_UNWIND_CODES-codecount],
1316 sizeof (UNWIND_CODE) * unwindinfo->unwindInfo.CountOfCodes);
1319 g_free (unwindinfo);
1322 RtlInstallFunctionTableCallback (((DWORD64)code) | 0x3, (DWORD64)code, code_size, MONO_GET_RUNTIME_FUNCTION_CALLBACK, code, NULL);
1327 #if MONO_SUPPORT_TASKLETS
1328 MonoContinuationRestore
1329 mono_tasklets_arch_restore (void)
1331 static guint8* saved = NULL;
1332 guint8 *code, *start;
1333 int cont_reg = AMD64_R9; /* register usable on both call conventions */
1336 return (MonoContinuationRestore)saved;
1337 code = start = mono_global_codeman_reserve (64);
1338 /* the signature is: restore (MonoContinuation *cont, int state, MonoLMF **lmf_addr) */
1339 /* cont is in AMD64_ARG_REG1 ($rcx or $rdi)
1340 * state is in AMD64_ARG_REG2 ($rdx or $rsi)
1341 * lmf_addr is in AMD64_ARG_REG3 ($r8 or $rdx)
1342 * We move cont to cont_reg since we need both rcx and rdi for the copy
1343 * state is moved to $rax so it's setup as the return value and we can overwrite $rsi
1345 amd64_mov_reg_reg (code, cont_reg, MONO_AMD64_ARG_REG1, 8);
1346 amd64_mov_reg_reg (code, AMD64_RAX, MONO_AMD64_ARG_REG2, 8);
1347 /* setup the copy of the stack */
1348 amd64_mov_reg_membase (code, AMD64_RCX, cont_reg, G_STRUCT_OFFSET (MonoContinuation, stack_used_size), sizeof (int));
1349 amd64_shift_reg_imm (code, X86_SHR, AMD64_RCX, 3);
1351 amd64_mov_reg_membase (code, AMD64_RSI, cont_reg, G_STRUCT_OFFSET (MonoContinuation, saved_stack), sizeof (gpointer));
1352 amd64_mov_reg_membase (code, AMD64_RDI, cont_reg, G_STRUCT_OFFSET (MonoContinuation, return_sp), sizeof (gpointer));
1353 amd64_prefix (code, X86_REP_PREFIX);
1356 /* now restore the registers from the LMF */
1357 amd64_mov_reg_membase (code, AMD64_RCX, cont_reg, G_STRUCT_OFFSET (MonoContinuation, lmf), 8);
1358 amd64_mov_reg_membase (code, AMD64_RBX, AMD64_RCX, G_STRUCT_OFFSET (MonoLMF, rbx), 8);
1359 amd64_mov_reg_membase (code, AMD64_RBP, AMD64_RCX, G_STRUCT_OFFSET (MonoLMF, rbp), 8);
1360 amd64_mov_reg_membase (code, AMD64_R12, AMD64_RCX, G_STRUCT_OFFSET (MonoLMF, r12), 8);
1361 amd64_mov_reg_membase (code, AMD64_R13, AMD64_RCX, G_STRUCT_OFFSET (MonoLMF, r13), 8);
1362 amd64_mov_reg_membase (code, AMD64_R14, AMD64_RCX, G_STRUCT_OFFSET (MonoLMF, r14), 8);
1363 amd64_mov_reg_membase (code, AMD64_R15, AMD64_RCX, G_STRUCT_OFFSET (MonoLMF, r15), 8);
1365 amd64_mov_reg_membase (code, AMD64_RDI, AMD64_RCX, G_STRUCT_OFFSET (MonoLMF, rdi), 8);
1366 amd64_mov_reg_membase (code, AMD64_RSI, AMD64_RCX, G_STRUCT_OFFSET (MonoLMF, rsi), 8);
1368 amd64_mov_reg_membase (code, AMD64_RSP, AMD64_RCX, G_STRUCT_OFFSET (MonoLMF, rsp), 8);
1370 /* restore the lmf chain */
1371 /*x86_mov_reg_membase (code, X86_ECX, X86_ESP, 12, 4);
1372 x86_mov_membase_reg (code, X86_ECX, 0, X86_EDX, 4);*/
1374 /* state is already in rax */
1375 amd64_jump_membase (code, cont_reg, G_STRUCT_OFFSET (MonoContinuation, return_ip));
1376 g_assert ((code - start) <= 64);
1378 return (MonoContinuationRestore)saved;