Lines Matching +full:0 +full:x40000000 +full:- +full:0 +full:x4fffffff
1 //===-- asan_mapping.h ------------------------------------------*- C++ -*-===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
12 //===----------------------------------------------------------------------===//
21 // Typical shadow mapping on Linux/x86_64 with SHADOW_OFFSET == 0x00007fff8000:
22 // || `[0x10007fff8000, 0x7fffffffffff]` || HighMem ||
23 // || `[0x02008fff7000, 0x10007fff7fff]` || HighShadow ||
24 // || `[0x00008fff7000, 0x02008fff6fff]` || ShadowGap ||
25 // || `[0x00007fff8000, 0x00008fff6fff]` || LowShadow ||
26 // || `[0x000000000000, 0x00007fff7fff]` || LowMem ||
28 // When SHADOW_OFFSET is zero (-pie):
29 // || `[0x100000000000, 0x7fffffffffff]` || HighMem ||
30 // || `[0x020000000000, 0x0fffffffffff]` || HighShadow ||
31 // || `[0x000000040000, 0x01ffffffffff]` || ShadowGap ||
34 // 0x003000000000 and 0x005000000000 (e.g. when prelink is installed):
35 // || `[0x10007fff8000, 0x7fffffffffff]` || HighMem ||
36 // || `[0x02008fff7000, 0x10007fff7fff]` || HighShadow ||
37 // || `[0x005000000000, 0x02008fff6fff]` || ShadowGap3 ||
38 // || `[0x003000000000, 0x004fffffffff]` || MidMem ||
39 // || `[0x000a7fff8000, 0x002fffffffff]` || ShadowGap2 ||
40 // || `[0x00067fff8000, 0x000a7fff7fff]` || MidShadow ||
41 // || `[0x00008fff7000, 0x00067fff7fff]` || ShadowGap ||
42 // || `[0x00007fff8000, 0x00008fff6fff]` || LowShadow ||
43 // || `[0x000000000000, 0x00007fff7fff]` || LowMem ||
46 // || `[0x40000000, 0xffffffff]` || HighMem ||
47 // || `[0x28000000, 0x3fffffff]` || HighShadow ||
48 // || `[0x24000000, 0x27ffffff]` || ShadowGap ||
49 // || `[0x20000000, 0x23ffffff]` || LowShadow ||
50 // || `[0x00000000, 0x1fffffff]` || LowMem ||
53 // (addresses starting with 0xc0000000 are reserved
55 // || `[0x38000000, 0xbfffffff]` || HighMem ||
56 // || `[0x27000000, 0x37ffffff]` || HighShadow ||
57 // || `[0x24000000, 0x26ffffff]` || ShadowGap ||
58 // || `[0x20000000, 0x23ffffff]` || LowShadow ||
59 // || `[0x00000000, 0x1fffffff]` || LowMem ||
62 // || `[0x2aaa0000, 0xffffffff]` || HighMem ||
63 // || `[0x0fff4000, 0x2aa9ffff]` || HighShadow ||
64 // || `[0x0bff4000, 0x0fff3fff]` || ShadowGap ||
65 // || `[0x0aaa0000, 0x0bff3fff]` || LowShadow ||
66 // || `[0x00000000, 0x0aa9ffff]` || LowMem ||
69 // || `[0x4000000000, 0xffffffffff]` || HighMem ||
70 // || `[0x2800000000, 0x3fffffffff]` || HighShadow ||
71 // || `[0x2400000000, 0x27ffffffff]` || ShadowGap ||
72 // || `[0x2000000000, 0x23ffffffff]` || LowShadow ||
73 // || `[0x0000000000, 0x1fffffffff]` || LowMem ||
75 // Default Linux/RISCV64 Sv39 mapping with SHADOW_OFFSET == 0xd55550000;
79 // || `[0x1555550000, 0x3fffffffff]` || HighMem ||
80 // || `[0x0fffffa000, 0x1555555fff]` || HighShadow ||
81 // || `[0x0effffa000, 0x0fffff9fff]` || ShadowGap ||
82 // || `[0x0d55550000, 0x0effff9fff]` || LowShadow ||
83 // || `[0x0000000000, 0x0d5554ffff]` || LowMem ||
85 // Default Linux/AArch64 (39-bit VMA) mapping:
86 // || `[0x2000000000, 0x7fffffffff]` || highmem ||
87 // || `[0x1400000000, 0x1fffffffff]` || highshadow ||
88 // || `[0x1200000000, 0x13ffffffff]` || shadowgap ||
89 // || `[0x1000000000, 0x11ffffffff]` || lowshadow ||
90 // || `[0x0000000000, 0x0fffffffff]` || lowmem ||
92 // Default Linux/AArch64 (42-bit VMA) mapping:
93 // || `[0x10000000000, 0x3ffffffffff]` || highmem ||
94 // || `[0x0a000000000, 0x0ffffffffff]` || highshadow ||
95 // || `[0x09000000000, 0x09fffffffff]` || shadowgap ||
96 // || `[0x08000000000, 0x08fffffffff]` || lowshadow ||
97 // || `[0x00000000000, 0x07fffffffff]` || lowmem ||
100 // || `[0x30000000, 0x7fffffff]` || HighMem ||
101 // || `[0x26000000, 0x2fffffff]` || HighShadow ||
102 // || `[0x24000000, 0x25ffffff]` || ShadowGap ||
103 // || `[0x20000000, 0x23ffffff]` || LowShadow ||
104 // || `[0x00000000, 0x1fffffff]` || LowMem ||
107 // || `[0x14000000000000, 0x1fffffffffffff]` || HighMem ||
108 // || `[0x12800000000000, 0x13ffffffffffff]` || HighShadow ||
109 // || `[0x12000000000000, 0x127fffffffffff]` || ShadowGap ||
110 // || `[0x10000000000000, 0x11ffffffffffff]` || LowShadow ||
111 // || `[0x00000000000000, 0x0fffffffffffff]` || LowMem ||
113 // Default Linux/SPARC64 (52-bit VMA) mapping:
114 // || `[0x8000000000000, 0xfffffffffffff]` || HighMem ||
115 // || `[0x1080000000000, 0x207ffffffffff]` || HighShadow ||
116 // || `[0x0090000000000, 0x107ffffffffff]` || ShadowGap ||
117 // || `[0x0080000000000, 0x008ffffffffff]` || LowShadow ||
118 // || `[0x0000000000000, 0x007ffffffffff]` || LowMem ||
120 // Default Linux/LoongArch64 (47-bit VMA) mapping:
121 // || `[0x500000000000, 0x7fffffffffff]` || HighMem ||
122 // || `[0x4a0000000000, 0x4fffffffffff]` || HighShadow ||
123 // || `[0x480000000000, 0x49ffffffffff]` || ShadowGap ||
124 // || `[0x400000000000, 0x47ffffffffff]` || LowShadow ||
125 // || `[0x000000000000, 0x3fffffffffff]` || LowMem ||
127 // Shadow mapping on FreeBSD/x86-64 with SHADOW_OFFSET == 0x400000000000:
128 // || `[0x500000000000, 0x7fffffffffff]` || HighMem ||
129 // || `[0x4a0000000000, 0x4fffffffffff]` || HighShadow ||
130 // || `[0x480000000000, 0x49ffffffffff]` || ShadowGap ||
131 // || `[0x400000000000, 0x47ffffffffff]` || LowShadow ||
132 // || `[0x000000000000, 0x3fffffffffff]` || LowMem ||
134 // Shadow mapping on FreeBSD/i386 with SHADOW_OFFSET == 0x40000000:
135 // || `[0x60000000, 0xffffffff]` || HighMem ||
136 // || `[0x4c000000, 0x5fffffff]` || HighShadow ||
137 // || `[0x48000000, 0x4bffffff]` || ShadowGap ||
138 // || `[0x40000000, 0x47ffffff]` || LowShadow ||
139 // || `[0x00000000, 0x3fffffff]` || LowMem ||
141 // Shadow mapping on NetBSD/x86-64 with SHADOW_OFFSET == 0x400000000000:
142 // || `[0x4feffffffe01, 0x7f7ffffff000]` || HighMem ||
143 // || `[0x49fdffffffc0, 0x4feffffffe00]` || HighShadow ||
144 // || `[0x480000000000, 0x49fdffffffbf]` || ShadowGap ||
145 // || `[0x400000000000, 0x47ffffffffff]` || LowShadow ||
146 // || `[0x000000000000, 0x3fffffffffff]` || LowMem ||
148 // Shadow mapping on NetBSD/i386 with SHADOW_OFFSET == 0x40000000:
149 // || `[0x60000000, 0xfffff000]` || HighMem ||
150 // || `[0x4c000000, 0x5fffffff]` || HighShadow ||
151 // || `[0x48000000, 0x4bffffff]` || ShadowGap ||
152 // || `[0x40000000, 0x47ffffff]` || LowShadow ||
153 // || `[0x00000000, 0x3fffffff]` || LowMem ||
158 // || `[0x50000000, 0xffffffff]` || HighMem ||
159 // || `[0x3a000000, 0x4fffffff]` || HighShadow ||
160 // || `[0x36000000, 0x39ffffff]` || ShadowGap ||
161 // || `[0x30000000, 0x35ffffff]` || LowShadow ||
162 // || `[0x00000000, 0x2fffffff]` || LowMem ||
167 # define ASAN_SHADOW_OFFSET_CONST (0)
172 # define ASAN_SHADOW_OFFSET_CONST 0x0aaa0000
174 # define ASAN_SHADOW_OFFSET_CONST 0x40000000
176 # define ASAN_SHADOW_OFFSET_CONST 0x40000000
178 # define ASAN_SHADOW_OFFSET_CONST 0x30000000
182 # define ASAN_SHADOW_OFFSET_CONST 0x20000000
190 # define ASAN_SHADOW_OFFSET_CONST 0x0000800000000000
194 # define ASAN_SHADOW_OFFSET_CONST 0x0000001000000000
196 # define ASAN_SHADOW_OFFSET_CONST 0x0000100000000000
198 # define ASAN_SHADOW_OFFSET_CONST 0x0010000000000000
200 # define ASAN_SHADOW_OFFSET_CONST 0x0000400000000000
202 # define ASAN_SHADOW_OFFSET_CONST 0x0000400000000000
204 # define ASAN_SHADOW_OFFSET_CONST 0x0000100000000000
206 # define ASAN_SHADOW_OFFSET_CONST 0x0000002000000000
208 # define ASAN_SHADOW_OFFSET_CONST 0x0000080000000000
210 # define ASAN_SHADOW_OFFSET_CONST 0x0000400000000000
216 # error "Original formula was: 0x7FFFFFFF & (~0xFFFULL << SHADOW_SCALE)."
218 # define ASAN_SHADOW_OFFSET_CONST 0x000000007fff8000
225 static const u64 kDefaultShadowSentinel = ~(uptr)0;
239 # define ASAN_PREMAP_SHADOW 0
244 # define DO_ASAN_MAPPING_PROFILE 0 // Set to 1 to profile the functions below.
254 # define ASAN_FIXED_MAPPING 0
261 // Fixed mapping for 64-bit Linux. Mostly used for performance comparison
262 // with non-fixed mapping. As of r175253 (Feb 2013) the performance
263 // difference between fixed and non-fixed mapping is below the noise level.
264 static uptr kHighMemEnd = 0x7fffffffffffULL;
265 static uptr kMidMemBeg = 0x3000000000ULL;
266 static uptr kMidMemEnd = 0x4fffffffffULL;
279 (((mem) - (ASAN_SHADOW_OFFSET)) << (ASAN_SHADOW_SCALE))
281 # define kLowMemBeg 0
282 # define kLowMemEnd (ASAN_SHADOW_OFFSET ? ASAN_SHADOW_OFFSET - 1 : 0)
295 // With the zero shadow base we can not actually map pages starting from 0.
297 # define kZeroBaseShadowStart 0
302 # define kShadowGapEnd ((kMidMemBeg ? kMidShadowBeg : kHighShadowBeg) - 1)
304 # define kShadowGap2Beg (kMidMemBeg ? kMidShadowEnd + 1 : 0)
305 # define kShadowGap2End (kMidMemBeg ? kMidMemBeg - 1 : 0)
307 # define kShadowGap3Beg (kMidMemBeg ? kMidMemEnd + 1 : 0)
308 # define kShadowGap3End (kMidMemBeg ? kHighShadowBeg - 1 : 0)
346 return ASAN_SHADOW_OFFSET == 0 || a >= kShadowGapBeg; in AddrIsInShadowGap()
350 // In zero-based shadow mode we treat addresses near zero as addresses in AddrIsInShadowGap()
352 if (ASAN_SHADOW_OFFSET == 0) in AddrIsInShadowGap()
370 (flags()->protect_shadow_gap == 0 && AddrIsInShadowGap(a)); in AddrIsInMem()
392 return (a & (ASAN_SHADOW_GRANULARITY - 1)) == 0; in AddrIsAlignedByGranularity()
402 (a & (ASAN_SHADOW_GRANULARITY - 1)) + kAccessSize - 1; in AddressIsPoisoned()