From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Date: Thu, 28 Jan 2016 10:20:44 +0100
Subject: [Buildroot] PowerPC64 toolchain not building
In-Reply-To: <20160128091742.45cad80d@free-electrons.com>
References: <20160123150731.1c1db4b0@free-electrons.com>
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 <20160124213607.6e3b1257@free-electrons.com>
 <20160127043858.GB6719@tungsten.ozlabs.ibm.com>
 <20160127093256.77169e7d@free-electrons.com>
 <20160128024442.GA5589@tungsten.ozlabs.ibm.com>
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Message-ID: <20160128102044.53877287@free-electrons.com>
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To: buildroot@busybox.net

Hello,

On Thu, 28 Jan 2016 09:17:42 +0100, Thomas Petazzoni wrote:

> I've restarted a build on my laptop, which has a more modern distro,
> I'll let you know the results.

The following defconfig:

BR2_powerpc64=y
BR2_powerpc_power8=y

fails to build on my machine, with the same error:

/tmp/ccZgjbrm.s: Assembler messages:
/tmp/ccZgjbrm.s:19: Error: operand out of domain (7 is not a multiple of 2)

Here is the offending assembly file:

	.file	"exch_n.c"
	.section	".toc","aw"
	.section	".text"
	.align 2
	.globl libat_exchange_16
	.hidden	libat_exchange_16
	.section	".opd","aw"
	.align 3
libat_exchange_16:
	.quad	.L.libat_exchange_16,.TOC. at tocbase,0
	.previous
	.type	libat_exchange_16, @function
.L.libat_exchange_16:
	sync
	mr 9,3
	mr 11,5
	mr 10,4
.L2:
	lqarx 7,0,9
	mr 3,7
	mr 4,8
	stqcx. 10,0,9
	bne- 0,.L2
	isync
	blr
	.long 0
	.byte 0,0,0,0,0,0,0,0
	.size	libat_exchange_16,.-.L.libat_exchange_16
	.globl __atomic_exchange_16
	.set	__atomic_exchange_16,libat_exchange_16
	.ident	"GCC: (Buildroot 2016.02-git-00995-g390d559) 4.9.3"

So the instruction "lqarx 7,0,9" is at fault.

Best regards,

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com