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[asan] Add an offset for the kernel address sanitizer on FreeBSD 

This is based on a port of the sanitizer runtime to the FreeBSD kernel
that has been commited as https://cgit.freebsd.org/src/commit/?id=38da497a4dfcf1979c8c2b0e9f3fa0564035c147
and the following commits.

Reviewed By: emaste, dim
Differential Revision: https://reviews.llvm.org/D98285
This commit is contained in:
Mark Johnston 2021-04-15 17:24:43 +01:00 committed by Alex Richardson
parent 99eca1bd9c
commit f511dc75e4
1 changed files with 7 additions and 3 deletions
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10
llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp
View File

@ -108,6 +108,7 @@ static const uint64_t kAArch64_ShadowOffset64 = 1ULL << 36;
static const uint64_t kRISCV64_ShadowOffset64 = 0xd55550000;
static const uint64_t kFreeBSD_ShadowOffset32 = 1ULL << 30;
static const uint64_t kFreeBSD_ShadowOffset64 = 1ULL << 46;
static const uint64_t kFreeBSDKasan_ShadowOffset64 = 0xdffff7c000000000;
static const uint64_t kNetBSD_ShadowOffset32 = 1ULL << 30;
static const uint64_t kNetBSD_ShadowOffset64 = 1ULL << 46;
static const uint64_t kNetBSDKasan_ShadowOffset64 = 0xdfff900000000000;
@ -493,9 +494,12 @@ static ShadowMapping getShadowMapping(Triple &TargetTriple, int LongSize,
Mapping.Offset = kPPC64_ShadowOffset64;
else if (IsSystemZ)
Mapping.Offset = kSystemZ_ShadowOffset64;
else if (IsFreeBSD && !IsMIPS64)
Mapping.Offset = kFreeBSD_ShadowOffset64;
else if (IsNetBSD) {
else if (IsFreeBSD && !IsMIPS64) {
if (IsKasan)
Mapping.Offset = kFreeBSDKasan_ShadowOffset64;
else
Mapping.Offset = kFreeBSD_ShadowOffset64;
} else if (IsNetBSD) {
if (IsKasan)
Mapping.Offset = kNetBSDKasan_ShadowOffset64;
else