AARCH64 support

src/arch.h

@@ -36,7 +36,17 @@ const instruction_t BREAKPOINT = 0xe7f001f0;
 #define rmb()             asm volatile("dmb ish" : : : "memory")
 #define flushCache(addr)  __builtin___clear_cache((char*)(addr), (char*)(addr) + sizeof(instruction_t))
 
+#elif defined(__aarch64__)
+
+typedef unsigned int instruction_t;
+const instruction_t BREAKPOINT = 0xd4200000;
+
+#define spinPause()       asm volatile("yield")
+#define rmb()             asm volatile("dmb ish" : : : "memory")
+#define flushCache(addr)  __builtin___clear_cache((char*)(addr), (char*)(addr) + sizeof(instruction_t))
+
 #else
+#warning "Compiling on unsupported arch"
 
 #define spinPause()
 #define rmb()             __sync_synchronize()

src/stackFrame_aarch64.cpp

@@ -0,0 +1,73 @@
+/*
+ * Copyright 2017 Andrei Pangin
+ * Copyright 2017 BellSoft LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * Author: Dmitry Samersoff
+ */
+
+#if defined(__aarch64__)
+
+#include "stackFrame.h"
+
+#include <stdio.h>
+
+#define REG_FP 29
+#define REG_LR 30
+
+uintptr_t& StackFrame::pc() {
+    return (uintptr_t&)_ucontext->uc_mcontext.pc;
+}
+
+uintptr_t& StackFrame::sp() {
+    return (uintptr_t&)_ucontext->uc_mcontext.sp;
+}
+
+uintptr_t& StackFrame::fp() {
+    return (uintptr_t&)_ucontext->uc_mcontext.regs[REG_FP];
+}
+
+uintptr_t StackFrame::arg0() {
+    return (uintptr_t)_ucontext->uc_mcontext.regs[0];
+}
+
+uintptr_t StackFrame::arg1() {
+    return (uintptr_t)_ucontext->uc_mcontext.regs[1];
+}
+
+uintptr_t StackFrame::arg2() {
+    return (uintptr_t)_ucontext->uc_mcontext.regs[2];
+}
+
+void StackFrame::ret() {
+    _ucontext->uc_mcontext.pc = _ucontext->uc_mcontext.regs[REG_LR];
+}
+
+bool StackFrame::pop() {
+    if (fp() == sp()) {
+      // Expected frame layout:
+      // sp   000000nnnnnnnnnn  [stack]
+      // sp+8 000000nnnnnnnnnn  [link]
+      fp() = stackAt(0);
+      pc() = stackAt(1);
+      sp() += 16;
+    }
+    else {
+      // Hope LR holds correct value
+      pc() = _ucontext->uc_mcontext.regs[REG_LR];
+    }
+    return true;
+}
+
+#endif // defined(__aarch64__)