riscv / riscv-cfi

This repo holds the work area and revisions of the RISC-V CFI (Shadow Stack and Landing Pads) specifications. CFI defines the privileged and unprivileged ISA extensions that can be used by privileged and unprivileged programs to protect the integrity of their control-flow.

https://jira.riscv.org/browse/RVG-80

Only JALR can return, and JAL doesn't have rs1

Larhzu opened this issue a year ago · comments

Lasse Collin commented a year ago

In cfi_intro.adoc:

A JAL or JALR may be used to perform either a procedure call or a return from a procedure.

Only JALR can be used for returning.

and a JAL/JALR where rs1 is the conventional link register

JAL doesn't have rs1.

Ved Shanbhogue commented a year ago

Updated in PR #120