ppc64le: fix kexec hang due to ppc64 elf abi breakage
Fedora bug:
https://bugzilla.redhat.com/show_bug.cgi?id=1310495
kexec kernel hangs in ppc64le test. It is caused by kexec does not support
abi v2 properly.
Backport upstream patches below fixes the issue:
There is no code conflicts.
commit 3debb8cf3272216119cb2e59a4963ce3c18fe8e3
Author: Alan Modra <amodra@gmail.com>
Date: Fri Feb 26 18:06:15 2016 +1100
Properly align powerpc64 .toc
gcc leaves .toc byte aligned, relying on the linker to align the section.
* kexec/arch/ppc64/kexec-elf-rel-ppc64.c (machine_verify_elf_rel):
Fudge alignment of .toc section.
Signed-off-by: Alan Modra <amodra@gmail.com>
Signed-off-by: Anton Blanchard <anton@samba.org>
Tested-by: Dave Young <dyoung@redhat.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
commit 1e423dc297d10eb7ff25c829d2856ef12fc81d77
Author: Anton Blanchard <anton@samba.org>
Date: Fri Feb 26 18:04:16 2016 +1100
ppc64: purgatory: Handle local symbols in ELF ABIv2
The PowerPC64 ELF ABIv2 has the concept of global and local symbols
and information on this is encoded in sym->st_other. When doing a
R_PPC64_REL24 branch we want to hit the local entry point, so adjust
it as necessary.
Signed-off-by: Anton Blanchard <anton@samba.org>
Tested-by: Dave Young <dyoung@redhat.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
commit 4a2ae3a39c64dc43e9d094be9541253234ff4822
Author: Anton Blanchard <anton@samba.org>
Date: Fri Feb 26 18:03:11 2016 +1100
Pass struct mem_sym into machine_apply_elf_rel()
On PowerPC64 ABIv2 we need to look at the symbol to determine
if it has a local entry point. Pass struct mem_sym into
machine_apply_elf_rel() so we can.
Signed-off-by: Anton Blanchard <anton@samba.org>
Tested-by: Dave Young <dyoung@redhat.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Xunlei Pang <xlpang@redhat.com>