abort/error: print backtrace, abuse templates, overhaul result/diag (macos not done yet)

libraries/libstratosphere/include/stratosphere/diag/impl/diag_backtrace_impl.os.linux.hpp

@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#pragma once
+#include <vapours.hpp>
+
+namespace ams::diag::impl {
+
+    class Backtrace {
+        private:
+            static constexpr size_t BacktraceEntryCountMax = 0x80;
+        private:
+            void *m_backtrace_addresses[BacktraceEntryCountMax];
+            size_t m_index = 0;
+            size_t m_size = 0;
+        public:
+            Backtrace() = default;
+
+            void Initialize();
+
+            bool Step();
+            uintptr_t GetStackPointer() const;
+            uintptr_t GetReturnAddress() const;
+    };
+
+}