diff options
Diffstat (limited to 'lib/asan/asan_mapping.h')
| -rw-r--r-- | lib/asan/asan_mapping.h | 93 |
1 files changed, 63 insertions, 30 deletions
diff --git a/lib/asan/asan_mapping.h b/lib/asan/asan_mapping.h index 1fecaeb35e1e..2746754152b6 100644 --- a/lib/asan/asan_mapping.h +++ b/lib/asan/asan_mapping.h @@ -43,54 +43,87 @@ // || `[0x00007fff8000, 0x00008fff6fff]` || LowShadow || // || `[0x000000000000, 0x00007fff7fff]` || LowMem || // -// Default Linux/i386 mapping: +// Default Linux/i386 mapping on x86_64 machine: // || `[0x40000000, 0xffffffff]` || HighMem || // || `[0x28000000, 0x3fffffff]` || HighShadow || // || `[0x24000000, 0x27ffffff]` || ShadowGap || // || `[0x20000000, 0x23ffffff]` || LowShadow || // || `[0x00000000, 0x1fffffff]` || LowMem || // +// Default Linux/i386 mapping on i386 machine +// (addresses starting with 0xc0000000 are reserved +// for kernel and thus not sanitized): +// || `[0x38000000, 0xbfffffff]` || HighMem || +// || `[0x27000000, 0x37ffffff]` || HighShadow || +// || `[0x24000000, 0x26ffffff]` || ShadowGap || +// || `[0x20000000, 0x23ffffff]` || LowShadow || +// || `[0x00000000, 0x1fffffff]` || LowMem || +// // Default Linux/MIPS mapping: -// || `[0x2aaa8000, 0xffffffff]` || HighMem || -// || `[0x0fffd000, 0x2aaa7fff]` || HighShadow || -// || `[0x0bffd000, 0x0fffcfff]` || ShadowGap || -// || `[0x0aaa8000, 0x0bffcfff]` || LowShadow || -// || `[0x00000000, 0x0aaa7fff]` || LowMem || +// || `[0x2aaa0000, 0xffffffff]` || HighMem || +// || `[0x0fff4000, 0x2aa9ffff]` || HighShadow || +// || `[0x0bff4000, 0x0fff3fff]` || ShadowGap || +// || `[0x0aaa0000, 0x0bff3fff]` || LowShadow || +// || `[0x00000000, 0x0aa9ffff]` || LowMem || +// +// Shadow mapping on FreeBSD/x86-64 with SHADOW_OFFSET == 0x400000000000: +// || `[0x500000000000, 0x7fffffffffff]` || HighMem || +// || `[0x4a0000000000, 0x4fffffffffff]` || HighShadow || +// || `[0x480000000000, 0x49ffffffffff]` || ShadowGap || +// || `[0x400000000000, 0x47ffffffffff]` || LowShadow || +// || `[0x000000000000, 0x3fffffffffff]` || LowMem || +// +// Shadow mapping on FreeBSD/i386 with SHADOW_OFFSET == 0x40000000: +// || `[0x60000000, 0xffffffff]` || HighMem || +// || `[0x4c000000, 0x5fffffff]` || HighShadow || +// || `[0x48000000, 0x4bffffff]` || ShadowGap || +// || `[0x40000000, 0x47ffffff]` || LowShadow || +// || `[0x00000000, 0x3fffffff]` || LowMem || static const u64 kDefaultShadowScale = 3; -static const u64 kDefaultShadowOffset32 = 1ULL << 29; +static const u64 kDefaultShadowOffset32 = 1ULL << 29; // 0x20000000 +static const u64 kIosShadowOffset32 = 1ULL << 30; // 0x40000000 static const u64 kDefaultShadowOffset64 = 1ULL << 44; static const u64 kDefaultShort64bitShadowOffset = 0x7FFF8000; // < 2G. +static const u64 kAArch64_ShadowOffset64 = 1ULL << 36; +static const u64 kMIPS32_ShadowOffset32 = 0x0aaa0000; +static const u64 kMIPS64_ShadowOffset64 = 1ULL << 36; static const u64 kPPC64_ShadowOffset64 = 1ULL << 41; -static const u64 kMIPS32_ShadowOffset32 = 0x0aaa8000; +static const u64 kFreeBSD_ShadowOffset32 = 1ULL << 30; // 0x40000000 +static const u64 kFreeBSD_ShadowOffset64 = 1ULL << 46; // 0x400000000000 -#if ASAN_FLEXIBLE_MAPPING_AND_OFFSET == 1 -extern SANITIZER_INTERFACE_ATTRIBUTE uptr __asan_mapping_scale; -extern SANITIZER_INTERFACE_ATTRIBUTE uptr __asan_mapping_offset; -# define SHADOW_SCALE (__asan_mapping_scale) -# define SHADOW_OFFSET (__asan_mapping_offset) +#define SHADOW_SCALE kDefaultShadowScale +#if SANITIZER_ANDROID +# define SHADOW_OFFSET (0) #else -# define SHADOW_SCALE kDefaultShadowScale -# if SANITIZER_ANDROID -# define SHADOW_OFFSET (0) -# else -# if SANITIZER_WORDSIZE == 32 -# if defined(__mips__) -# define SHADOW_OFFSET kMIPS32_ShadowOffset32 -# else -# define SHADOW_OFFSET kDefaultShadowOffset32 -# endif +# if SANITIZER_WORDSIZE == 32 +# if defined(__mips__) +# define SHADOW_OFFSET kMIPS32_ShadowOffset32 +# elif SANITIZER_FREEBSD +# define SHADOW_OFFSET kFreeBSD_ShadowOffset32 # else -# if defined(__powerpc64__) +# if SANITIZER_IOS +# define SHADOW_OFFSET kIosShadowOffset32 +# else +# define SHADOW_OFFSET kDefaultShadowOffset32 +# endif +# endif +# else +# if defined(__aarch64__) +# define SHADOW_OFFSET kAArch64_ShadowOffset64 +# elif defined(__powerpc64__) # define SHADOW_OFFSET kPPC64_ShadowOffset64 -# elif SANITIZER_MAC -# define SHADOW_OFFSET kDefaultShadowOffset64 -# else -# define SHADOW_OFFSET kDefaultShort64bitShadowOffset -# endif +# elif SANITIZER_FREEBSD +# define SHADOW_OFFSET kFreeBSD_ShadowOffset64 +# elif SANITIZER_MAC +# define SHADOW_OFFSET kDefaultShadowOffset64 +# elif defined(__mips64) +# define SHADOW_OFFSET kMIPS64_ShadowOffset64 +# else +# define SHADOW_OFFSET kDefaultShort64bitShadowOffset # endif # endif -#endif // ASAN_FLEXIBLE_MAPPING_AND_OFFSET +#endif #define SHADOW_GRANULARITY (1ULL << SHADOW_SCALE) #define MEM_TO_SHADOW(mem) (((mem) >> SHADOW_SCALE) + (SHADOW_OFFSET)) |