Re: [Qemu-devel] [RFC PATCH] s390x-linux-user

[Ulrich Hecht]

On Friday 26 June 2009, Stuart Brady wrote:
> Also, if S/390 has separate read/execute page bits, would access to
> the memory location in question still count as 'execution'?

I think so:

"The fetching of the target instruction is considered to be an 
instruction fetch for purposes of program-event recording and for 
purposes of reporting access exceptions."

BTW, I got a detail wrong in the description of EXECUTE (not in the 
code): The register used for the OR operation is encoded in the EXECUTE 
instruction, with 0 meaning "don't OR". So it can actually be any 
general-purpose register _except_ R0. See 
http://publibfp.boulder.ibm.com/cgi-bin/bookmgr/download/A2278324.pdf  
page 7-126.

CU
Uli

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