NonStop S-Series Server Description Manual (G06.27+)

Memory Addressing and Access

HP NonStop S-Series Server Description Manual—520331-004

4-20

TNS Process Code Allocations

For TNS processes, including processes that have accelerated object code,

addressing for the user code file of that process occupies the 70 region. The start of

this region is hexadecimal address 70000000. See Figure 4-10. Up to the first 32 (of

the 256) unitary segments of this region can be allocated for the TNS object code.

Corresponding accelerated code, if any, occupies a portion of the remaining 224

unitary segments; see next topic. The user code segments are usually designated as

UC.0 through UC.31.

Addressing for the user library (if any) of a given process occupies the 72 region. The

start of this region is hexadecimal address 72000000. Up to the first 32 unitary

segments of this region can be allocated for the TNS object code. Corresponding

accelerated code, if any, occupies a portion of the remaining 224 unitary segments;

see next topic. The user library segments are usually designated as UL.0 through

UL.31.

Addressing for the system library, which is common to all processes, occupies the 7A

and 7C regions. Much of the actual code for the system library is in native code (SLr)

and occupies the 7C region. However, TNS processes call the native library

procedures through shells in the TNS area of the system library (SL). The start of this

SL region is hexadecimal address 7A000000. Up to the first 32 unitary segments of

this region can be allocated for the TNS object code. Corresponding accelerated code

occupies a portion of the remaining 224 unitary segments; see next topic. The system

library segments are usually designated as SL.0 through SL.31. The system library

regions are globally mapped.

The 7E region, the last region of the nonprivileged space contains parts of the millicode

needed to support the currently executing process. That includes all of the

nonprivileged portions of the millicode library executed by nonprivileged programs,

including the TNS interpreter millicode. (Privileged parts of the millicode are located in

the privileged space, Kseg0.) The last 64 unitary segments of the 7E region are used

by the operating system for special purposes. Like the system library, the 7E region is

globally mapped.