Debug Manual

Debug Manual—421921-003
Glossary-1
Glossary
This glossary defines technical terms related to the design of the operating system, to
HP system architecture, and to the Debug facility. The following definitions should help
you interpret the information on using Debug.
absolute extended address. An address that can be used, when the processor module is
in privileged mode, to access any byte of virtual memory in the processor module.
accelerate. To use the Accelerator program to generate an accelerated object file.
accelerated mode. The operational environment in which Accelerator-generated RISC
instructions execute.
accelerated object code. The RISC instructions that result from processing a TNS object
file with the Accelerator.
accelerated object file. The object file that results from processing a TNS object file with
the Accelerator. An accelerated object file contains the original TNS object code, the
accelerated object code and related address map tables, and any binder and symbol
information from the original TNS object file.
Accelerator. A program that processes a TNS object file and produces an accelerated
object file. Most TNS object code that has been accelerated runs faster on TNS/R
processors than TNS object code that has not been accelerated.
breakpoint. A location in a program at which execution is suspended so that you can
examine and modify the program’s state. A breakpoint can occur just before the
execution of a specific instruction (instruction breakpoint), or it can occur when a
specific memory location is accessed in a specified way (memory-access breakpoint).
A TNS breakpoint is an instruction breakpoint within a sequence of TNS instructions. A
RISC breakpoint is an instruction breakpoint within a sequence of RISC instructions. In
accelerated code, a TNS breakpoint can be placed only at a memory-exact point or at
a register-exact point; Debug sets a corresponding RISC breakpoint.
byte. A group of eight consecutive bits; the smallest addressable unit of memory.
C-series system. A system that is running a C-release version of the HP NonStop
operating system.
central processing unit (CPU). Traditionally, the main data processing unit of a computer.
A HP system has multiple cooperating processors rather than a single processor, and
processors are sometimes loosely called processors.
CISC. See complex instruction-set computing (CISC).
code image. The part of an object file that contains the machine instructions that make up
procedures in one or more code segments.