On 10/17/2016 03:55 AM, Christian Borntraeger wrote:
On 10/17/2016 10:26 AM, Thomas Huth wrote:
On 14.10.2016 20:58, Michael Tokarev wrote:

This commit: c9bc3437a905b660561a26cd4ecc64579843267b
Author: Richard Henderson <r...@twiddle.net>
Date:   Tue Jun 21 17:32:12 2016 -0700

    linux-user: Provide safe_syscall for s390x

does not build on debian unstable porterbox for s390x, with
the following error message:

linux-user/host/s390x/safe-syscall.inc.S: Assembler messages:
linux-user/host/s390x/safe-syscall.inc.S:75: Error: Unrecognized opcode:
rules.mak:72: recipe for target 'linux-user/safe-syscall.o' failed

Since I know nothing about s390, I've no idea what's at fault
here... :)  Thought I'd report this :)

"lt" seems to be a newer s390x opcode which has been added to the
architecture within the last ten years or so. So maybe you've got to add
some "-march=xxx" flag when compiling this file?
Could you maybe start with finding out the exact comand line that is
used to compile this file?

Yes, lt was added with the extended immidiate facility. So either use 
-march=z9-109 (introduced in
2005) or replace the lt with an l + ltr to also run on older models.

Whoops. I'd forgotten that RHEL defaults to z196 these days. This piece of code is certainly not important enough to conditionalize on newer hardware. I'll put together a patch.


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