linux-kernel - [PATCH 3.16.y-ckt 011/104] powerpc/boot: Specify ABI v2 when building an LE boot wrapper

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Message-Id: <1445867006-18048-12-git-send-email-luis.henriques@canonical.com>
Date:	Mon, 26 Oct 2015 13:41:53 +0000
From:	Luis Henriques <luis.henriques@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Michael Ellerman <mpe@...erman.id.au>,
	Luis Henriques <luis.henriques@...onical.com>
Subject: [PATCH 3.16.y-ckt 011/104] powerpc/boot: Specify ABI v2 when building an LE boot wrapper

3.16.7-ckt19 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Benjamin Herrenschmidt <benh@...nel.crashing.org>

commit 655471f54c2e395ba29ae4156ba0f49928177cc1 upstream.

The kernel does it, not the boot wrapper, which breaks with some
cross compilers that still default to ABI v1.

Fixes: 147c05168fc8 ("powerpc/boot: Add support for 64bit little endian wrapper")
Signed-off-by: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@...erman.id.au>
Signed-off-by: Luis Henriques <luis.henriques@...onical.com>
---
 arch/powerpc/boot/Makefile | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
index ccc25eddbcb8..f5443645ffca 100644
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -28,6 +28,9 @@ BOOTCFLAGS	+= -m64
 endif
 ifdef CONFIG_CPU_BIG_ENDIAN
 BOOTCFLAGS	+= -mbig-endian
+else
+BOOTCFLAGS	+= -mlittle-endian
+BOOTCFLAGS	+= $(call cc-option,-mabi=elfv2)
 endif
 
 BOOTAFLAGS	:= -D__ASSEMBLY__ $(BOOTCFLAGS) -traditional -nostdinc
--
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