>So, tracing 32bit sys calls on 64 bit platform is the basic issue.

There are two sysent tables sysent (native, 64 bit) and sysent32(32 bit
system calls).

You need to modify the 32 bit and the 64 bit entry (and you need to provide
a native and a 32 bit implementation but in some cases they can be
the same). But certainly you need to change the entry in both system call
tables.

Casper

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