Zicfilp Extension

Versions

Version 1.0.0

State

ratified

Ratification date

2024-07

Synopsis

The Zicfilp extension introduces a landing-pad instruction and related execution state to enforce forward-edge control-flow integrity.

Instructions

The following instructions are affected by this extension:

lpad

No synopsis available

Parameters

This extension has the following implementation options (AKA parameters):

REPORT_CAUSE_IN_MTVAL_ON_LANDING_PAD_SOFTWARE_CHECK

Type

boolean

Valid Values

boolean

Description

When true, mtval is written with the shadow stack cause (code=18) when a SoftwareCheck exception is raised into M-mode due to a landing pad error.

When false, mtval is written with 0.
REPORT_CAUSE_IN_STVAL_ON_LANDING_PAD_SOFTWARE_CHECK

Type

boolean

Valid Values

boolean

Description

When true, stval is written with the shadow stack cause (code=18) when a SoftwareCheck exception is raised into S-mode due to a landing pad error.

When false, stval is written with 0.
REPORT_CAUSE_IN_VSTVAL_ON_LANDING_PAD_SOFTWARE_CHECK

Type

boolean

Valid Values

boolean

Description

When true, vstval is written with the shadow stack cause (code=18) when a SoftwareCheck exception is raised into VS-mode due to a landing pad error.

When false, vstval is written with 0.