RE: [PATCH]IA64 trap code 16 bytes atomic copy on montecito, take 2

From: Chen, Kenneth W <>
Date: 2006-11-02 18:38:36
Mao, Bibo wrote on Wednesday, November 01, 2006 7:12 PM
>  On IA64 kprobe can not insert trap code on slot 1 because
> opcode of slot 1 crosses over two consecutive 8-bytes. On
> montecito machine 16 bytes atomic operation is avaiable.
> This patch adds ia64_ld16/ia64_st16 instrins in gcc header
> file, implements atomic instr bundle updating by cpu feature.

Let me take a giant step back and ask you a question:

Have you explored all possible avenue of inserting a probe with
only 8-byte write to slot 1 instruction?  I think it is doable.

- Ken
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Received on Thu Nov 02 18:38:52 2006

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