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Type: Specification
Resolution: Unresolved
Priority: Medium
Labels:

RVI Staff Action:
Required
Short Name:
ShadStkLandPads
Is Fast Track?:
No
ISA or NON-ISA:
ISA
GitHub:
https://github.com/riscv/riscv-cfi
Extensions:
Zicfiss, Zicfilp
ARC Status:
Freeze Approved
Public Review:
Completed
Number of Comments:
4

This document is capturing discussions at the Shadow Stacks and Landing Pads TG and attempts to document the baseline. This is not official specification and everything in this document may change. Control-flow Integrity (CFI) provides CPU instruction set architecture (ISA) capabilities to defend against Return-Oriented Programming (ROP) and Call/Jump-Oriented Programming (COP/JOP) style control-flow subversion attacks.
To enforce backward edge control-flow integrity, the extension introduces a shadow stack. To enforce forward edge control-flow integrity, the extension introduces labeled landing pad instructions.

Obsolete Documentation:

Plan: https://docs.google.com/document/d/1oDMWrCTGBmXuDUEYRgfs-ndqtOzfzkYPwVZ3AOxZy90/edit

Acceptance Criteria: https://docs.google.com/spreadsheets/d/1DfOtcR45YhnTlW4pmYmBnDQhqh38KUzDZA3Mhfnlao8/edit#gid=1751770475

Groups.io
https://lists.riscv.org/g/tech-unprivileged
https://lists.riscv.org/g/tech-privileged

1.	[Inception] - Infrastructure Setup Request	Done	Unassigned	10/Jul/23	03/Jul/23	0
2.	[Plan] - Develop Specification Plan	Done	Unassigned	17/Jul/23	03/Jul/23	0
3.	[Plan] - Governing Committee Approval	Approved	Rafael Sene	10/Jul/23	03/Jul/23	0
4.	[Plan] - Schedule Plan Presentation to Chairs	Done	Unassigned	10/Jul/23	03/Jul/23	0
5.	[Plan] - Present Plan to Chairs	Done	Unassigned	10/Jul/23	03/Jul/23	0
6.	[Plan] - Chairs Approval	Approved	Rafael Sene	10/Jul/23	03/Jul/23	0
7.	[Plan] - Notify TSC	Done	Unassigned	10/Jul/23	03/Jul/23	0
8.	[Development] - Develop Specification	Done	Unassigned	21/Apr/23	21/Apr/23	0
9.	[Development] - Governing Committee Specification Stabilization Approval	Approved	Rafael Sene	10/Jul/23	03/Jul/23	0
10.	[Freeze] - Request Internal Review	Done	Unassigned	17/Jul/23	12/Mar/24	1
11.	[Freeze] - Complete Documentation of New Instructions, State Changes, and ISA Alterations	Done	Unassigned	29/Sep/23	29/Dec/23	2
12.	[Freeze] - Develop Opcode Support	Done	Unassigned	29/Sep/23	29/Dec/23	2
13.	[Freeze] - Implement Simulator Support	Done	Unassigned	29/Sep/23	05/Jan/24	1
14.	[Freeze] - Implement psABI	Done	Unassigned	29/Sep/23	05/Jan/24	1
15.	[Freeze] - Develop Support for GCC	Done	Unassigned	29/Sep/23	01/May/24	1
16.	[Freeze] - Develop RISC-V Tests	Done	Unassigned	29/Sep/23	29/Dec/23	2
17.	[Freeze] - Perform Input Testing	Done	Unassigned	29/Sep/23	29/Dec/23	2
18.	[Freeze] - Add Support into the Sail Golden Model	Done	Unassigned	29/Sep/23	05/Jan/24	2
19.	[Freeze] - Create Proof of Concept	Done	Unassigned	29/Sep/23	07/Mar/24	6
20.	[Freeze] - ARC Review (required)	AR Approved	Rafael Sene	29/Sep/23	13/Feb/24	11
21.	[Freeze] - Ensure Compliance with RISC-V Specification Policies	Approved	Jeff Scheel	19/Jan/24	05/Feb/24	9
22.	[Freeze] - Request Signoffs from Committee Chair	Approved	Jeff Scheel	26/Jan/24	21/Mar/24	4
23.	[Freeze] - Request Signoff from RISC-V CTO	Approved	Jeff Scheel	29/Jan/24	07/Mar/24	1
24.	[Ratification-Ready] - Public Review	Public Review Done	Unassigned	27/Apr/24	27/Apr/24	3
25.	[Ratification-Ready] - Resolve Freeze Waivers	Not Required for Ratification-Ready	Unassigned	28/Mar/24	01/May/24	1
26.	[Ratification-Ready] - Document Complete	Done	Unassigned	28/Mar/24	01/May/24	1
27.	[Ratification-Ready] - Unified Discovery	Ratification-Ready Waiver Granted	Unassigned	28/Mar/24		2
28.	[Ratification-Ready] - Regression Testing	Done	Unassigned	28/Mar/24	01/May/24	1
29.	[Ratification-Ready] - Architectural Compatibility Tests	Done	Unassigned	28/Mar/24	01/May/24	1
30.	[Ratification-Ready] - Industry Standard Tests	Done	Unassigned	28/Mar/24	01/May/24	1
31.	[Ratification-Ready] - OS Enablement	Done	Unassigned	28/Mar/24	01/May/24	1
32.	[Ratification-Ready] - GitHub Structure	Done	Jeff Scheel	28/Mar/24	07/May/24	1
33.	[Ratification-Ready] - Profiles	Done	Unassigned	28/Mar/24	01/May/24	1
34.	[Ratification-Ready] - Raise Pull Request against the ISA main repository	Done	Unassigned		02/May/24	1
35.	[Ratification-Ready] - AR Review (required for significant changes)	AR Review Not Required	Rafael Sene	05/Apr/24		1
36.	[Ratification-Ready] - Ensure Compliance with RISC-V Specification Policies	Approval In Progress	Jeff Scheel	28/Mar/24		2
37.	[Ratification-Ready] - Committee Chair Signoffs	Not Started	Jeff Scheel	28/Mar/24		1
38.	[Ratification-Ready] - CTO Signoff	Not Started	Jeff Scheel	28/Mar/24		0
39.	[Ratification-Ready] - TSC Approval	Not Started	Jeff Scheel	01/Apr/24		0
40.	[Ratification-Ready] - Schedule BoD Review	Not Started	Rafael Sene	30/May/24		0
41.	[Ratification-Ready] - BoD Approval	Not Started	Rafael Sene	30/May/24		0

Assignee:: Unassigned

Reporter:: Rafael Sene

Votes:: 0 Vote for this issue

Watchers:: 4 Start watching this issue

Created:: 03/Jul/23 8:51 PM

Updated:: 6 days ago 7:43 PM

Target Plan Approval:: 31/Dec/22

Actual ARC Freeze Approval:: 13/Feb/24

Target Tech Chairs Freeze Approval:: 26/Jan/24

Actual Tech Chairs Freeze Approval:: 21/Mar/24

Target Public Review Start:: 29/Jan/24

Actual Public Review Start:: 28/Mar/24

Target Public Review Completion:: 27/Apr/24

Actual Public Review Completion:: 27/Apr/24

Target Tech Chairs Ratification Approval:: 15/Mar/24

Target TSC Ratification Approval:: 22/Mar/24

Target BoD Ratification Approval:: 30/May/24

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