Issue with AIX 5.3 and nlist/nlist64/knlist


 
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Operating Systems AIX Issue with AIX 5.3 and nlist/nlist64/knlist
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Old 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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nlist_ia(4)						     Kernel Interfaces Manual						       nlist_ia(4)

NAME
nlist_ia: nlist, nlist64 - structure formats for Integrity systems SYNOPSIS
Remarks The exact content of the structure defined below can be best found by examining It varies somewhat between various HP-UX implementations. This manpage describes on Integrity systems. For on PA-RISC systems, see nlist_pa(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, and both can process SOM and Elf files. Since symbol tables are machine dependent (as defined in each implementation's copy of a header file, is defined to encapsulate the differences. 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. The structure is the same as the structure and is used for source compatibility purposes. SEE ALSO
nlist(3C), a.out(4). Integrity Systems Only nlist_ia(4)