Indirect branch tracking: Difference between revisions
making this about the overall topic |
m The Anome moved page Indirect Branch Tracking to Indirect branch tracking over redirect: generic term |
(No difference)
|
Revision as of 10:40, 23 February 2024
Indirect branch tracking (IBT), also known as branch target identification (BTI) is a control flow integrity mechanism implemented on some Intel x86-64 and ARM-64 processors. IBT is designed to protect against computer security exploits that use indirect branch instructions to jump into code in unintended ways, such as return-oriented programming.
It creates a special "branch target" instructions that have no function other than to mark a location as a valid indirect branch target, with the processor capable of being put into a mode where it will raise an exception if an indirect branch is made to a location without a branch target instruction.
Implementations
On Intel processors, the technique is knon as Indirect Branch Tracking (IBT). [1] The similar technology on ARM-64 processors is called Branch Target Identification (BTI).[2]
References
- ^ Corbet, Jonathan (March 31, 2022). "Indirect branch tracking for Intel CPUs". lwn.net. Retrieved 2023-07-14.
- ^ "Documentation – Arm Developer". developer.arm.com. December 2021. Retrieved 2023-07-14.