This instruction is used for function return, and usually ESP will be assigned to EIP (the instruction address
of CPU execution) before return.
The call stack information includes the instruction address
, function name, function parameters, etc., and is not suitable for calculating the eigenvalue.
The latter situation is detected by the Injector, which in this setup monitors both the instruction opcode and the instruction address
Additionally, a programmable instruction address
breakpoint is provided to assist in software debugging.
Performing the table lookup in such a manner can be very efficient, since it can be done in the early stages of the pipeline (the instruction address
is usually known at fetch stage).
The lookup routines map a VAX instruction address
to a translated Alpha AXP code address.
Each entry in the MIROM contains two instruction parcels plus the next instruction address
and a stop bit.
"Binary stirring: Self-randomizing instruction addresses
of legacy x86 binary code," in Proc.ACMConf.
According to USP's Frequently Asked Questions for General Chapter <1> Injections, Section on Labeling on Ferrules and Cap Overseals (August 4, 2010): "For those manufacturers who wish to maintain the information printed on the cap or ferrule, rationale must be provided to the FDA explaining why the instruction addressed
in the statement in considered to be life threatening.
The new Vatican instruction addresses
those concerns, stipulating that: