Hardware mechanism for instruction/data address tracing

Details Hardware mechanism for instruction/data address tracing Hardware mechanism for instruction/data address tracing

1994-04-15

1995-08-29

Canney, Vincent P.

Boots, shoes, and leggings

3642675, G06F 1300

Patent

active

054468760

ABSTRACT:
An improved instruction tracing mechanism provides a combination of hardware, internal to the CPU, and novel software. Additional registers are added to interconnected to the CPU. These registers store values indicating the instruction address, data address, whether the instruction was a load or store, the number of bytes moved and whether any address mapping changes occurred. The registers are read by a trace interrupt handler which then provides the information to a trace buffer and a profile buffer. The end user can then access the trace and profile information through the input/output (I/O) system of the data processing system.

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