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Commit Graph

Author	SHA1	Message	Date
Craig Topper	e538fc74d4	[X86] Remove checks for FeatureAVX512 from the X86 assembly parser. Remove mcpu/mattr from assembly test command lines. Summary: We should always be able to accept AVX512 registers and instructions in llvm-mc. The only subtarget mode that should be checked is 16-bit vs 32-bit vs 64-bit mode. I've also removed all the mattr/mcpu lines from test RUN lines to be consistent with this. Most were due to AVX512, but a few were for other features. Fixes PR36202 Reviewers: RKSimon, echristo, bkramer Reviewed By: echristo Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D42824 llvm-svn: 324106	2018-02-02 17:02:58 +00:00
Oren Ben Simhon	1c6308ecd5	Instrument Control Flow For Indirect Branch Tracking CET (Control-Flow Enforcement Technology) introduces a new mechanism called IBT (Indirect Branch Tracking). According to IBT, each Indirect branch should land on dedicated ENDBR instruction (End Branch). The new pass adds ENDBR instructions for every indirect jmp/call (including jumps using jump tables / switches). For more information, please see the following: https://software.intel.com/sites/default/files/managed/4d/2a/control-flow-enforcement-technology-preview.pdf Differential Revision: https://reviews.llvm.org/D40482 Change-Id: Icb754489faf483a95248f96982a4e8b1009eb709 llvm-svn: 322062	2018-01-09 08:51:18 +00:00
Oren Ben Simhon	fa582b075c	Control-Flow Enforcement Technology - Shadow Stack support (LLVM side) Shadow stack solution introduces a new stack for return addresses only. The HW has a Shadow Stack Pointer (SSP) that points to the next return address. If we return to a different address, an exception is triggered. The shadow stack is managed using a series of intrinsics that are introduced in this patch as well as the new register (SSP). The intrinsics are mapped to new instruction set that implements CET mechanism. The patch also includes initial infrastructure support for IBT. For more information, please see the following: https://software.intel.com/sites/default/files/managed/4d/2a/control-flow-enforcement-technology-preview.pdf Differential Revision: https://reviews.llvm.org/D40223 Change-Id: I4daa1f27e88176be79a4ac3b4cd26a459e88fed4 llvm-svn: 318996	2017-11-26 13:02:45 +00:00

Author

SHA1

Message

Date

Craig Topper

e538fc74d4

[X86] Remove checks for FeatureAVX512 from the X86 assembly parser. Remove mcpu/mattr from assembly test command lines.

Summary:
We should always be able to accept AVX512 registers and instructions in llvm-mc. The only subtarget mode that should be checked is 16-bit vs 32-bit vs 64-bit mode.

I've also removed all the mattr/mcpu lines from test RUN lines to be consistent with this. Most were due to AVX512, but a few were for other features.

Fixes PR36202

Reviewers: RKSimon, echristo, bkramer

Reviewed By: echristo

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D42824

llvm-svn: 324106

2018-02-02 17:02:58 +00:00

Oren Ben Simhon

1c6308ecd5

Instrument Control Flow For Indirect Branch Tracking

CET (Control-Flow Enforcement Technology) introduces a new mechanism called IBT (Indirect Branch Tracking).
According to IBT, each Indirect branch should land on dedicated ENDBR instruction (End Branch).
The new pass adds ENDBR instructions for every indirect jmp/call (including jumps using jump tables / switches).
For more information, please see the following:
https://software.intel.com/sites/default/files/managed/4d/2a/control-flow-enforcement-technology-preview.pdf

Differential Revision: https://reviews.llvm.org/D40482

Change-Id: Icb754489faf483a95248f96982a4e8b1009eb709
llvm-svn: 322062

2018-01-09 08:51:18 +00:00

Oren Ben Simhon

fa582b075c

Control-Flow Enforcement Technology - Shadow Stack support (LLVM side)

Shadow stack solution introduces a new stack for return addresses only.
The HW has a Shadow Stack Pointer (SSP) that points to the next return address.
If we return to a different address, an exception is triggered.
The shadow stack is managed using a series of intrinsics that are introduced in this patch as well as the new register (SSP).
The intrinsics are mapped to new instruction set that implements CET mechanism.

The patch also includes initial infrastructure support for IBT.

For more information, please see the following:
https://software.intel.com/sites/default/files/managed/4d/2a/control-flow-enforcement-technology-preview.pdf

Differential Revision: https://reviews.llvm.org/D40223

Change-Id: I4daa1f27e88176be79a4ac3b4cd26a459e88fed4
llvm-svn: 318996

2017-11-26 13:02:45 +00:00

3 Commits