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Wed, 10 Mar 2021 09:33:28 GMT Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1B8C0A405F; Wed, 10 Mar 2021 09:33:44 +0000 (GMT) Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id BC604A405B; Wed, 10 Mar 2021 09:33:43 +0000 (GMT) Received: from ozlabs.au.ibm.com (unknown [9.192.253.14]) by b06wcsmtp001.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 10 Mar 2021 09:33:43 +0000 (GMT) Received: from [9.206.216.192] (unknown [9.206.216.192]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ozlabs.au.ibm.com (Postfix) with ESMTPSA id 09B2760522; Wed, 10 Mar 2021 20:33:40 +1100 (AEDT) Subject: Re: PowerPC64 future proof kernel toc, revised for lld To: Alan Modra References: <20210309045638.GI6042@bubble.grove.modra.org> <20210310034813.GM6042@bubble.grove.modra.org> <3c92968f-7c61-8d36-4001-91f8630de4b1@linux.ibm.com> <20210310050722.GN6042@bubble.grove.modra.org> From: Alexey Kardashevskiy Message-ID: <5aa60950-d93c-f700-3b0b-a01f947e8a22@linux.ibm.com> Date: Wed, 10 Mar 2021 20:33:37 +1100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:85.0) Gecko/20100101 Thunderbird/85.0 MIME-Version: 1.0 In-Reply-To: <20210310050722.GN6042@bubble.grove.modra.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.369, 18.0.761 definitions=2021-03-10_07:2021-03-09, 2021-03-10 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 phishscore=0 impostorscore=0 malwarescore=0 adultscore=0 lowpriorityscore=0 mlxscore=0 bulkscore=0 mlxlogscore=999 priorityscore=1501 spamscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2103100043 X-Mailman-Approved-At: Wed, 10 Mar 2021 20:42:36 +1100 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: alexey@au1.ibm.com, linuxppc-dev@lists.ozlabs.org, ellerman@au1.ibm.com Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" One more question - the older version had a construct "DEFINED (.TOC.) ? .TOC. : ..." in case .TOC. is not defined (too old ld? too old gcc?) but the newer patch seems assuming it is always defined, when was it added? I have the same check in SLOF, for example, do I still need it? On 10/03/2021 16:07, Alan Modra wrote: > On Wed, Mar 10, 2021 at 03:44:44PM +1100, Alexey Kardashevskiy wrote: >> For my own education, is .got for prom_init.o still generated by ld or gcc? > > .got is generated by ld. > >> In other words, should "objdump -D -s -j .got" ever dump .got for any .o >> file, like below? > > No. "objdump -r prom_init.o | grep GOT" will tell you whether > prom_init.o *may* cause ld to generate .got entries. (Linker > optimisations or --gc-sections might remove the need for those .got > entries.) > >> objdump: section '.got' mentioned in a -j option, but not found in any input >> file > > Right, expected. > -- Alexey Kardashevskiy IBM OzLabs, LTC Team e-mail: aik@linux.ibm.com