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-rw-r--r--lib/dfsan/dfsan_platform.h107
1 files changed, 107 insertions, 0 deletions
diff --git a/lib/dfsan/dfsan_platform.h b/lib/dfsan/dfsan_platform.h
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+++ b/lib/dfsan/dfsan_platform.h
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+//===-- dfsan_platform.h ----------------------------------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is a part of DataFlowSanitizer.
+//
+// Platform specific information for DFSan.
+//===----------------------------------------------------------------------===//
+
+#ifndef DFSAN_PLATFORM_H
+#define DFSAN_PLATFORM_H
+
+namespace __dfsan {
+
+#if defined(__x86_64__)
+struct Mapping {
+ static const uptr kShadowAddr = 0x10000;
+ static const uptr kUnionTableAddr = 0x200000000000;
+ static const uptr kAppAddr = 0x700000008000;
+ static const uptr kShadowMask = ~0x700000000000;
+};
+#elif defined(__mips64)
+struct Mapping {
+ static const uptr kShadowAddr = 0x10000;
+ static const uptr kUnionTableAddr = 0x2000000000;
+ static const uptr kAppAddr = 0xF000008000;
+ static const uptr kShadowMask = ~0xF000000000;
+};
+#elif defined(__aarch64__)
+struct Mapping39 {
+ static const uptr kShadowAddr = 0x10000;
+ static const uptr kUnionTableAddr = 0x1000000000;
+ static const uptr kAppAddr = 0x7000008000;
+ static const uptr kShadowMask = ~0x7800000000;
+};
+
+struct Mapping42 {
+ static const uptr kShadowAddr = 0x10000;
+ static const uptr kUnionTableAddr = 0x8000000000;
+ static const uptr kAppAddr = 0x3ff00008000;
+ static const uptr kShadowMask = ~0x3c000000000;
+};
+
+extern int vmaSize;
+# define DFSAN_RUNTIME_VMA 1
+#else
+# error "DFSan not supported for this platform!"
+#endif
+
+enum MappingType {
+ MAPPING_SHADOW_ADDR,
+ MAPPING_UNION_TABLE_ADDR,
+ MAPPING_APP_ADDR,
+ MAPPING_SHADOW_MASK
+};
+
+template<typename Mapping, int Type>
+uptr MappingImpl(void) {
+ switch (Type) {
+ case MAPPING_SHADOW_ADDR: return Mapping::kShadowAddr;
+ case MAPPING_UNION_TABLE_ADDR: return Mapping::kUnionTableAddr;
+ case MAPPING_APP_ADDR: return Mapping::kAppAddr;
+ case MAPPING_SHADOW_MASK: return Mapping::kShadowMask;
+ }
+}
+
+template<int Type>
+uptr MappingArchImpl(void) {
+#ifdef __aarch64__
+ if (vmaSize == 39)
+ return MappingImpl<Mapping39, Type>();
+ else
+ return MappingImpl<Mapping42, Type>();
+ DCHECK(0);
+#else
+ return MappingImpl<Mapping, Type>();
+#endif
+}
+
+ALWAYS_INLINE
+uptr ShadowAddr() {
+ return MappingArchImpl<MAPPING_SHADOW_ADDR>();
+}
+
+ALWAYS_INLINE
+uptr UnionTableAddr() {
+ return MappingArchImpl<MAPPING_UNION_TABLE_ADDR>();
+}
+
+ALWAYS_INLINE
+uptr AppAddr() {
+ return MappingArchImpl<MAPPING_APP_ADDR>();
+}
+
+ALWAYS_INLINE
+uptr ShadowMask() {
+ return MappingArchImpl<MAPPING_SHADOW_MASK>();
+}
+
+} // namespace __dfsan
+
+#endif