+#if MONO_SUPPORT_TASKLETS
+MonoContinuationRestore
+mono_tasklets_arch_restore (void)
+{
+ static guint8* saved = NULL;
+ guint8 *code, *start;
+ int cont_reg = AMD64_R9; /* register usable on both call conventions */
+ const guint kMaxCodeSize = NACL_SIZE (64, 128);
+
+
+ if (saved)
+ return (MonoContinuationRestore)saved;
+ code = start = mono_global_codeman_reserve (kMaxCodeSize);
+ /* the signature is: restore (MonoContinuation *cont, int state, MonoLMF **lmf_addr) */
+ /* cont is in AMD64_ARG_REG1 ($rcx or $rdi)
+ * state is in AMD64_ARG_REG2 ($rdx or $rsi)
+ * lmf_addr is in AMD64_ARG_REG3 ($r8 or $rdx)
+ * We move cont to cont_reg since we need both rcx and rdi for the copy
+ * state is moved to $rax so it's setup as the return value and we can overwrite $rsi
+ */
+ amd64_mov_reg_reg (code, cont_reg, MONO_AMD64_ARG_REG1, 8);
+ amd64_mov_reg_reg (code, AMD64_RAX, MONO_AMD64_ARG_REG2, 8);
+ /* setup the copy of the stack */
+ amd64_mov_reg_membase (code, AMD64_RCX, cont_reg, G_STRUCT_OFFSET (MonoContinuation, stack_used_size), sizeof (int));
+ amd64_shift_reg_imm (code, X86_SHR, AMD64_RCX, 3);
+ x86_cld (code);
+ amd64_mov_reg_membase (code, AMD64_RSI, cont_reg, G_STRUCT_OFFSET (MonoContinuation, saved_stack), sizeof (gpointer));
+ amd64_mov_reg_membase (code, AMD64_RDI, cont_reg, G_STRUCT_OFFSET (MonoContinuation, return_sp), sizeof (gpointer));
+ amd64_prefix (code, X86_REP_PREFIX);
+ amd64_movsl (code);
+
+ /* now restore the registers from the LMF */
+ amd64_mov_reg_membase (code, AMD64_RCX, cont_reg, G_STRUCT_OFFSET (MonoContinuation, lmf), 8);
+ amd64_mov_reg_membase (code, AMD64_RBX, AMD64_RCX, G_STRUCT_OFFSET (MonoLMF, rbx), 8);
+ amd64_mov_reg_membase (code, AMD64_RBP, AMD64_RCX, G_STRUCT_OFFSET (MonoLMF, rbp), 8);
+ amd64_mov_reg_membase (code, AMD64_R12, AMD64_RCX, G_STRUCT_OFFSET (MonoLMF, r12), 8);
+ amd64_mov_reg_membase (code, AMD64_R13, AMD64_RCX, G_STRUCT_OFFSET (MonoLMF, r13), 8);
+ amd64_mov_reg_membase (code, AMD64_R14, AMD64_RCX, G_STRUCT_OFFSET (MonoLMF, r14), 8);
+#if !defined(__native_client_codegen__)
+ amd64_mov_reg_membase (code, AMD64_R15, AMD64_RCX, G_STRUCT_OFFSET (MonoLMF, r15), 8);
+#endif
+#ifdef TARGET_WIN32
+ amd64_mov_reg_membase (code, AMD64_RDI, AMD64_RCX, G_STRUCT_OFFSET (MonoLMF, rdi), 8);
+ amd64_mov_reg_membase (code, AMD64_RSI, AMD64_RCX, G_STRUCT_OFFSET (MonoLMF, rsi), 8);
+#endif
+ amd64_mov_reg_membase (code, AMD64_RSP, AMD64_RCX, G_STRUCT_OFFSET (MonoLMF, rsp), 8);
+
+ /* restore the lmf chain */
+ /*x86_mov_reg_membase (code, X86_ECX, X86_ESP, 12, 4);
+ x86_mov_membase_reg (code, X86_ECX, 0, X86_EDX, 4);*/