Re: [Qemu-devel] Provide safe_syscall for s390x

[Michael Tokarev]

17.10.2016 11:26, Thomas Huth пишет:
> On 14.10.2016 20:58, Michael Tokarev wrote:
>> Hi.
>>
>> This commit: c9bc3437a905b660561a26cd4ecc64579843267b
>> Author: Richard Henderson <address@hidden>
>> 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:
>> `lt'
>> 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?

Here we go:

cc -I/«BUILDDIR»/qemu-2.7+dfsg/tcg -I/«BUILDDIR»/qemu-2.7+dfsg/tcg/s390
-I/«BUILDDIR»/qemu-2.7+dfsg/linux-headers
-I/«BUILDDIR»/qemu-2.7+dfsg/qemu-build/linux-headers -I.
-I/«BUILDDIR»/qemu-2.7+dfsg -I/«BUILDDIR»/qemu-2.7+dfsg/include
-I/«BUILDDIR»/qemu-2.7+dfsg/linux-user -Ilinux-user
-I/usr/include/pixman-1  -DHAS_LIBSSH2_SFTP_FSYNC -m64 -D_GNU_SOURCE
-D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -Wstrict-prototypes
-Wredundant-decls -Wall -Wundef -Wwrite-strings -Wmissing-prototypes
-fno-strict-aliasing -fno-common  -g -O2
-fdebug-prefix-map=/«BUILDDIR»/qemu-2.7+dfsg=. -fstack-protector-strong
-Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2
-DCONFIG_QEMU_DATAPATH='"/usr/share/qemu:/usr/share/seabios:/usr/lib/ipxe/qemu"'
-DVENDOR_DEBIAN -Wendif-labels -Wno-shift-negative-value
-Wmissing-include-dirs -Wempty-body -Wnested-externs -Wformat-security
-Wformat-y2k -Winit-self -Wignored-qualifiers -Wold-style-declaration
-Wold-style-definition -Wtype-limits -fstack-protector-strong
-I/usr/include/p11-kit-1    -I/usr/include/libpng16
-I/usr/include/cacard -I/usr/include/libusb-1.0   -I../linux-headers
-I.. -I/«BUILDDIR»/qemu-2.7+dfsg/target-alpha -DNEED_CPU_H
-I/«BUILDDIR»/qemu-2.7+dfsg/include
-I/«BUILDDIR»/qemu-2.7+dfsg/linux-user/alpha
-I/«BUILDDIR»/qemu-2.7+dfsg/linux-user/host/s390x
-I/«BUILDDIR»/qemu-2.7+dfsg/linux-user -MMD -MP -MT
linux-user/safe-syscall.o -MF linux-user/safe-syscall.d -O2
-U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -pthread -I/usr/include/glib-2.0
-I/usr/lib/s390x-linux-gnu/glib-2.0/include -pthread
-I/usr/include/glib-2.0 -I/usr/lib/s390x-linux-gnu/glib-2.0/include -g
-c -o linux-user/safe-syscall.o
/«BUILDDIR»/qemu-2.7+dfsg/linux-user/safe-syscall.S
/«BUILDDIR»/qemu-2.7+dfsg/linux-user/host/s390x/safe-syscall.inc.S:
Assembler messages:
/«BUILDDIR»/qemu-2.7+dfsg/linux-user/host/s390x/safe-syscall.inc.S:75:
Error: Unrecognized opcode: `lt'
/«BUILDDIR»/qemu-2.7+dfsg/rules.mak:72: recipe for target
'linux-user/safe-syscall.o' failed
make[2]: *** [linux-user/safe-syscall.o] Error 1

(cc is gcc 6.2.0)

I've no idea which -march is the default and what choices are available.

/mjt