how to create a powerpc64 poudriere jail ?

[Jan Beich]

Kurt Jaeger <lists at opsec.eu> writes:

> [00:00:08] ====>> Starting jail p64-default
> [00:00:08] ====>> Error: Unable to execute id(1) in jail. Emulation or ABI wrong.

Check foreign ABI support by running a static binary. If you see something
like the following then --magic or --mask argument (for ELF header) is wrong.

  $ /poudriere/jails/head-powerpc64/rescue/ls
  sh: /poudriere/jails/head-powerpc64/rescue/ls: Exec format error

but it may not help if dynamically linked binaries still fail

  [00:00:01] ====>> Starting jail head-powerpc64-default
  Invalid data memory access: 0x000007ec00000000
  qemu: uncaught target signal 11 (Segmentation fault) - core dumped
  Segmentation fault
  [00:00:01] ====>> Error: Unable to execute id(1) in jail. Emulation or ABI wrong.

> magic: 0x7f 0x45 0x4c 0x46  0x01 0x02 0x01 0x00  0x00 0x00 0x00 0x00 
                                ^^
This byte looks wrong. After applying the attached patch run

  $ service qemu_user_static onerestart

>        0x00 0x00 0x00 0x00  0x00 0x02 0x00 0x15 
> mask:  0xff 0xff 0xff 0xff  0xff 0xff 0xff 0x00  0xff 0xff 0xff 0xff 
>        0xff 0xff 0xff 0xff  0xff 0xfe 0xff 0xff 

$ hd -n20 /poudriere/jails/head-powerpc64/rescue/ls
00000000  7f 45 4c 46 02 02 01 09  00 00 00 00 00 00 00 00  |.ELF............|
00000010  00 02 00 15                                       |....|
00000014

Index: emulators/qemu-sbruno/files/qemu_user_static.in
===================================================================
--- emulators/qemu-sbruno/files/qemu_user_static.in	(revision 415647)
+++ emulators/qemu-sbruno/files/qemu_user_static.in	(working copy)
@@ -98,7 +98,7 @@ list_cmd="${BINMISCCTL} list"
 	interpreter=${QEMU_DIR}/${QEMU_PREFIX}ppc64${QEMU_SUFFIX}
 	if [ -x "${interpreter}" ]; then
 		${BINMISCCTL} add powerpc64 --interpreter "${interpreter}" \
-			--magic "\x7f\x45\x4c\x46\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x15" \
+			--magic "\x7f\x45\x4c\x46\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x15" \
 			--mask "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff" \
 			--size 20 --set-enabled
 	else
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