From b9de21ef51a7ceab7122a707c188602eae22c4ee Mon Sep 17 00:00:00 2001
From: Chris Clayton <chris2553@googlemail.com>
Date: Mon, 20 Aug 2018 12:00:31 +0100
Subject: [PATCH] kexec: fix for "Unhandled rela relocation: R_X86_64_PLT32" error

In response to a change in binutils, commit b21ebf2fb4c
(x86: Treat R_X86_64_PLT32 as R_X86_64_PC32) was applied to
the linux kernel during the 4.16 development cycle and has
since been backported to earlier stable kernel series. The
change results in the failure message in $SUBJECT when
rebooting via kexec.

Fix this by replicating the change in kexec.

Upstream-Status: Backport[https://git.kernel.org/pub/scm/utils/kernel/kexec/kexec-tools.git/commit/?id=b9de21ef51a7ceab7122a707c188602eae22c4ee]

Signed-off-by: Chris Clayton <chris2553@googlemail.com>
Acked-by: Baoquan He <bhe@redhat.com>
Tested-by: Bhupesh Sharma <bhsharma@redhat.com>
Acked-by: Bhupesh Sharma <bhsharma@redhat.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Mingli Yu <Mingli.Yu@windriver.com>
---
 kexec/arch/x86_64/kexec-elf-rel-x86_64.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kexec/arch/x86_64/kexec-elf-rel-x86_64.c b/kexec/arch/x86_64/kexec-elf-rel-x86_64.c
index 7fdde73..db85b44 100644
--- a/kexec/arch/x86_64/kexec-elf-rel-x86_64.c
+++ b/kexec/arch/x86_64/kexec-elf-rel-x86_64.c
@@ -79,6 +79,7 @@ void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr),
 			goto overflow;
 		break;
 	case R_X86_64_PC32: 
+	case R_X86_64_PLT32:
 		*(uint32_t *)location = value - address;
 		break;
 	default:
-- 
2.7.4