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Add NetBSD ASAN shadow mapping for x86-64 

Summary:
The maximal virtual address on NetBSD/amd64 is 0x7f7ffffff000.
Define shadow offset 0x400000000000 (1ULL << 46).

Sponsored by <The NetBSD Foundation>

Reviewers: joerg, vitalybuka, filcab, fjricci, kcc, eugenis, pcc

Reviewed By: kcc

Subscribers: llvm-commits, kubamracek, #sanitizers

Tags: #sanitizers

Differential Revision: https://reviews.llvm.org/D36587

llvm-svn: 311937
This commit is contained in:
Kamil Rytarowski 2017-08-28 21:41:04 +00:00
parent 5ad6bdf2fd
commit 357bbc57f9
1 changed files with 10 additions and 0 deletions
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10
compiler-rt/lib/asan/asan_mapping.h
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@ -115,6 +115,13 @@
// || `[0x40000000, 0x47ffffff]` || LowShadow ||
// || `[0x00000000, 0x3fffffff]` || LowMem ||
//
// Shadow mapping on NetBSD/x86-64 with SHADOW_OFFSET == 0x400000000000:
// || `[0x4feffffffe01, 0x7f7ffffff000]` || HighMem ||
// || `[0x49fdffffffc0, 0x4feffffffe00]` || HighShadow ||
// || `[0x480000000000, 0x49fdffffffbf]` || ShadowGap ||
// || `[0x400000000000, 0x47ffffffffff]` || LowShadow ||
// || `[0x000000000000, 0x3fffffffffff]` || LowMem ||
//
// Default Windows/i386 mapping:
// (the exact location of HighShadow/HighMem may vary depending
// on WoW64, /LARGEADDRESSAWARE, etc).
@ -140,6 +147,7 @@ static const u64 kPPC64_ShadowOffset64 = 1ULL << 41;
static const u64 kSystemZ_ShadowOffset64 = 1ULL << 52;
static const u64 kFreeBSD_ShadowOffset32 = 1ULL << 30; // 0x40000000
static const u64 kFreeBSD_ShadowOffset64 = 1ULL << 46; // 0x400000000000
static const u64 kNetBSD_ShadowOffset64 = 1ULL << 46; // 0x400000000000
static const u64 kWindowsShadowOffset32 = 3ULL << 28; // 0x30000000
#define SHADOW_SCALE kDefaultShadowScale
@ -179,6 +187,8 @@ static const u64 kWindowsShadowOffset32 = 3ULL << 28; // 0x30000000
# define SHADOW_OFFSET kSystemZ_ShadowOffset64
# elif SANITIZER_FREEBSD
# define SHADOW_OFFSET kFreeBSD_ShadowOffset64
# elif SANITIZER_NETBSD
# define SHADOW_OFFSET kNetBSD_ShadowOffset64
# elif SANITIZER_MAC
# define SHADOW_OFFSET kDefaultShadowOffset64
# elif defined(__mips64)