MinSFI: Add loader

src/minsfi/trusted/entry.c

+/*
+ * Copyright (c) 2014 The Native Client Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "native_client/src/include/minsfi.h"
+#include "native_client/src/include/minsfi_priv.h"
+
+/*
+ * Fixed offset of the data segment. This must be kept in sync with the
+ * AllocateDataSegment compiler pass.
+ */
+#define DATASEG_OFFSET 0x10000
+
+/* Globals exported by the sandbox, aka the manifest. */
+extern uint32_t    __sfi_pointer_size;
+extern const char  __sfi_data_segment[];
+extern uint32_t    __sfi_data_segment_size;
+
+/* Entry point of the sandbox */
+extern uint32_t _start_minsfi(void);
+
+static inline void GetManifest(MinsfiManifest *sb) {
+  sb->ptr_size = __sfi_pointer_size;
+  sb->dataseg_offset = DATASEG_OFFSET;
+  sb->dataseg_size = __sfi_data_segment_size;
+  sb->dataseg_template = __sfi_data_segment;
+}
+
+bool MinsfiInitializeSandbox(void) {
+  MinsfiManifest manifest;
+  MinsfiSandbox sb;
+
+  if (MinsfiGetActiveSandbox() != NULL)
+    return true;
+
+  GetManifest(&manifest);
+  if (!MinsfiInitSandbox(&manifest, &sb))
+    return false;
+
+  MinsfiSetActiveSandbox(&sb);
+  return true;
+}
+
+int MinsfiInvokeSandbox(void) {
+  if (MinsfiGetActiveSandbox() == NULL)
+    return EXIT_FAILURE;
+
+  return _start_minsfi();
+}
+
+bool MinsfiDestroySandbox(void) {
+  const MinsfiSandbox *sb;
+
+  if ((sb = MinsfiGetActiveSandbox()) == NULL)
+    return true;
+
+  if (MinsfiUnmapSandbox(sb)) {
+    MinsfiSetActiveSandbox(NULL);
+    return true;
+  }
+
+  return false;
+}