Exploring compressed bounds for CHERI

Akilan1999 / CHERI-FLEXPOINTER

This repo consists of the experiment on porting FlexPointer to CHERI.

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Open Akilan1999 opened 1 year ago

Akilan1999 commented 1 year ago

The objective would be to use compressed bounds within CHERI to get the BASE (TOP) and LIMIT(BOTTOM) of the virtual or physical address space.

Akilan1999 commented 1 year ago

vaddr_t cheri_base_get(void *c) Return the lower bound of capability c. source (https://www.cl.cam.ac.uk/techreports/UCAM-CL-TR-947.pdf page: 28).

Akilan1999 commented 1 year ago

The plan is use ARM TBI (Top Byte Ignore). Encoding the Delta value to the Pointer.