From mboxrd@z Thu Jan 1 00:00:00 1970 From: kernelrocks@gmail.com (Aleix Roca Nonell) Date: Sat, 3 Nov 2018 13:54:39 +0100 Subject: Unsupported relocation type: R_X86_64_PLT32 Message-ID: <20181103125439.GA2327@rocks.localdomain> To: kernelnewbies@lists.kernelnewbies.org List-Id: kernelnewbies.lists.kernelnewbies.org Hi all! In my attempt to write my first useful kernel patch, I'm tracking down a possibly kernel regression on my laptop's wireless driver. I'm trying to use git bisect to narrow down the problem and I'm having trouble compiling a Linux kernel 4.14 from Linus tree in my Arch Linux. The error I'm getting is "Unsupported relocation type: R_X86_64_PLT32" I have read about gcc enabling -fPIC by default from gcc-6 so I have tried compiling with gcc-{8,7,5,4.9} with and without "-fno-pic -no-pic" by running make CC="gcc-5 -fno-pic -no-pic" with no luck. I was expecting those R_X86_64_PLT32 relocations not to be generated with this options but there is something I have still not understood. I have been able to compile the kernel after applying greg's stable tree patch [1] (and [2,3] for gcc-8) but the kernel refuses to boot. Any help/comments on either the problem or the followed methodology will be appreciated! Thank you! :D [1] - https://lore.kernel.org/patchwork/patch/892780/ [2] - https://lore.kernel.org/patchwork/patch/868613/ [3] - https://lore.kernel.org/patchwork/patch/934722/ From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wr1-x441.google.com ([2a00:1450:4864:20::441]) by shelob.surriel.com with esmtps (TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128) (Exim 4.91) (envelope-from ) id 1gIvT5-0006x0-Sq for kernelnewbies@kernelnewbies.org; Sat, 03 Nov 2018 08:56:00 -0400 Received: by mail-wr1-x441.google.com with SMTP id r10-v6so4634124wrv.6 for ; Sat, 03 Nov 2018 05:55:59 -0700 (PDT) Received: from rocks.localdomain (135.red-88-17-35.dynamicip.rima-tde.net. [88.17.35.135]) by smtp.gmail.com with ESMTPSA id 191-v6sm26127222wmk.30.2018.11.03.05.54.56 for (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Sat, 03 Nov 2018 05:54:57 -0700 (PDT) Date: Sat, 3 Nov 2018 13:54:39 +0100 From: Aleix Roca Nonell To: Kernel Newbies Mailing List Subject: Unsupported relocation type: R_X86_64_PLT32 Message-ID: <20181103125439.GA2327@rocks.localdomain> MIME-Version: 1.0 Content-Disposition: inline List-Id: Learn about the Linux kernel List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kernelnewbies-bounces@kernelnewbies.org Message-ID: <20181103125439.xLMx24C5rgk05fgGR8Ty5G5KqnNmOTmW0YIyEhnWltc@z> Hi all! In my attempt to write my first useful kernel patch, I'm tracking down a possibly kernel regression on my laptop's wireless driver. I'm trying to use git bisect to narrow down the problem and I'm having trouble compiling a Linux kernel 4.14 from Linus tree in my Arch Linux. The error I'm getting is "Unsupported relocation type: R_X86_64_PLT32" I have read about gcc enabling -fPIC by default from gcc-6 so I have tried compiling with gcc-{8,7,5,4.9} with and without "-fno-pic -no-pic" by running make CC="gcc-5 -fno-pic -no-pic" with no luck. I was expecting those R_X86_64_PLT32 relocations not to be generated with this options but there is something I have still not understood. I have been able to compile the kernel after applying greg's stable tree patch [1] (and [2,3] for gcc-8) but the kernel refuses to boot. Any help/comments on either the problem or the followed methodology will be appreciated! Thank you! :D [1] - https://lore.kernel.org/patchwork/patch/892780/ [2] - https://lore.kernel.org/patchwork/patch/868613/ [3] - https://lore.kernel.org/patchwork/patch/934722/ _______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies