Index: src/minsfi/trusted/state.c |
diff --git a/src/minsfi/trusted/state.c b/src/minsfi/trusted/state.c |
new file mode 100644 |
index 0000000000000000000000000000000000000000..122429001087798d5a680c4a4edd23c47a03fe7a |
--- /dev/null |
+++ b/src/minsfi/trusted/state.c |
@@ -0,0 +1,35 @@ |
+/* |
+ * 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 <string.h> |
+ |
+#include "native_client/src/include/minsfi_priv.h" |
+ |
+/* |
+ * This is the memory base variable which the SFI-sandboxed pointers are |
+ * treated relative to. It is defined in the trusted runtime, exported and then |
+ * imported by the untrusted code via the compiler transforms. It is a 64-bit |
+ * unsigned integer on both 32-bit and 64-bit platforms. See comments in the |
+ * SandboxMemoryAccesses MinSFI LLVM pass for more details. |
+ */ |
+uint64_t __sfi_memory_base = 0; |
+ |
+static MinsfiSandbox ActiveSandbox = { .mem_base = NULL }; |
+ |
+const MinsfiSandbox *MinsfiGetActiveSandbox(void) { |
+ if (ActiveSandbox.mem_base != NULL) |
+ return &ActiveSandbox; |
+ else |
+ return NULL; |
+} |
+ |
+void MinsfiSetActiveSandbox(const MinsfiSandbox *sb) { |
+ if (sb != NULL) |
+ memcpy(&ActiveSandbox, sb, sizeof(MinsfiSandbox)); |
+ else |
+ ActiveSandbox.mem_base = NULL; |
+ |
+ __sfi_memory_base = (uintptr_t) ActiveSandbox.mem_base; |
+} |