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Commit Graph

Author	SHA1	Message	Date
Evgeniy Stepanov	43271b1803	[hwasan] Fix inline instrumentation. This patch changes hwasan inline instrumentation: Fixes address untagging for shadow address calculation (use 0xFF instead of 0x00 for the top byte). Emits brk instruction instead of hlt for the kernel and user space. Use 0x900 instead of 0x100 for brk immediate (0x100 - 0x800 are unavailable in the kernel). Fixes and adds appropriate tests. Patch by Andrey Konovalov. Differential Revision: https://reviews.llvm.org/D43135 llvm-svn: 325711	2018-02-21 19:52:23 +00:00
Evgeniy Stepanov	80ccda2d4b	[hwasan] Fix kernel instrumentation of stack. Summary: Kernel addresses have 0xFF in the most significant byte. A tag can not be pushed there with OR (tag << 56); use AND ((tag << 56) \| 0x00FF..FF) instead. Reviewers: kcc, andreyknvl Subscribers: srhines, llvm-commits, hiraditya Differential Revision: https://reviews.llvm.org/D42941 llvm-svn: 324691	2018-02-09 00:59:10 +00:00

Author

SHA1

Message

Date

Evgeniy Stepanov

43271b1803

[hwasan] Fix inline instrumentation.

This patch changes hwasan inline instrumentation:

Fixes address untagging for shadow address calculation (use 0xFF instead of 0x00 for the top byte).
Emits brk instruction instead of hlt for the kernel and user space.
Use 0x900 instead of 0x100 for brk immediate (0x100 - 0x800 are unavailable in the kernel).
Fixes and adds appropriate tests.

Patch by Andrey Konovalov.

Differential Revision: https://reviews.llvm.org/D43135

llvm-svn: 325711

2018-02-21 19:52:23 +00:00

Evgeniy Stepanov

80ccda2d4b

[hwasan] Fix kernel instrumentation of stack.

Summary:
Kernel addresses have 0xFF in the most significant byte.
A tag can not be pushed there with OR (tag << 56);
use AND ((tag << 56) | 0x00FF..FF) instead.

Reviewers: kcc, andreyknvl

Subscribers: srhines, llvm-commits, hiraditya

Differential Revision: https://reviews.llvm.org/D42941

llvm-svn: 324691

2018-02-09 00:59:10 +00:00

2 Commits