exo/mariko fatal: save fatal error binaries to the SD

exosphere/mariko_fatal/source/fatal_save_context.cpp

@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2018-2020 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/>.
+ */
+#include <exosphere.hpp>
+#include "fatal_save_context.hpp"
+#include "fs/fatal_fs_api.hpp"
+
+namespace ams::secmon::fatal {
+
+    Result SaveFatalErrorContext(const ams::impl::FatalErrorContext *ctx) {
+        /* Mount the SD card. */
+        R_UNLESS(fs::MountSdCard(), fs::ResultPartitionNotFound());
+
+        /* Unmount the SD card once we're done. */
+        ON_SCOPE_EXIT { fs::UnmountSdCard(); };
+
+        /* Create and open the file. */
+        fs::FileHandle file;
+        {
+            /* Generate the file path. */
+            char path[0x40];
+            util::TSNPrintf(path, sizeof(path), "/atmosphere/fatal_errors/report_%016" PRIx64 ".bin", ctx->report_identifier);
+
+            /* Create the file. */
+            R_TRY(fs::CreateFile(path, sizeof(*ctx)));
+
+            /* Open the file. */
+            R_TRY(fs::OpenFile(std::addressof(file), path, fs::OpenMode_ReadWrite));
+        }
+
+        /* Ensure we close the file when done with it. */
+        ON_SCOPE_EXIT { fs::CloseFile(file); };
+
+        /* Write the context to the file. */
+        R_TRY(fs::WriteFile(file, 0, ctx, sizeof(*ctx), fs::WriteOption::Flush));
+
+        return ResultSuccess();
+    }
+
+}