03-03-2005
Issue with AIX 5.3 and nlist/nlist64/knlist
I have encountered a problem that I cannot resolve. We have two
different AIX 5.3 boxes. On one box, regardless of whether it is
booted in 32 bit mode or 64 bit mode, I can obtain kernel metrics (i.e,
using kernel symbol names sysinfo or avenrun) via the nlink or nlink64
system call. On the second machine, these calls fail. I have never
seen these calls fail before. The machines do have different patches
applied but nothing is obvious as to why the kernel symbol names would
not be present on the second machine. My understanding is that these
kernel symbol names should be there. Both machines are functioning
fine. Does anyone have an idea as to the cause of this problem?
Thanks in advance.
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LEARN ABOUT HPUX
nlist_pa
nlist_pa(4) Kernel Interfaces Manual nlist_pa(4)
NAME
nlist_pa: nlist, nlist64 - structure formats for PA-RISC systems
SYNOPSIS
Remarks
The exact content of the structures defined below can be best found by examining It varies somewhat between various HP-UX implementations.
This manpage describes on PA-RISC systems. For on Integrity systems, see nlist_ia(4).
DESCRIPTION
and can be used to extract information from the symbol table in an object file (see nlist(3C)). They are basically the same tool except
can only process SOM files on a PA-RISC 32-bit system while can process SOM and ELF files on either a PA-RISC 32-bit or 64-bit system.
Since symbol tables are machine dependent (as defined in each implementation's copy of a header file, is defined to encapsulate the differ-
ences.
The nlist function, either or when used with the corresponding nlist structure, can be used to extract certain information about selected
symbols in the symbol table. The data associated with each symbol is machine specific, thus only the name and position of the field in the
function is standardized by HP-UX. The rest of the structure includes at least the value and type of the symbol. The names and meanings
of all fields not standardized will change no more than necessary.
SEE ALSO
nlist(3C), a.out(4).
PA-RISC Systems Only nlist_pa(4)