From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from pegase1.c-s.fr (pegase1.c-s.fr [93.17.236.30]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 3ttjFb3MP6zDqHB for ; Wed, 4 Jan 2017 18:32:34 +1100 (AEDT) Subject: Re: bootx_init.c:88: undefined reference to `__stack_chk_fail_local' To: Christian Kujau References: Cc: Michael Ellerman , linuxppc-dev@lists.ozlabs.org From: Christophe LEROY Message-ID: <81ef821b-8af2-0ee5-ab35-58639548dab7@c-s.fr> Date: Wed, 4 Jan 2017 08:32:26 +0100 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252; format=flowed List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Le 03/01/2017 à 16:25, Christian Kujau a écrit : > Hi, > > when compiling v4.10-rc2 with CONFIG_CC_STACKPROTECTOR_STRONG=y, the > linker fails with: > > ================================ > + ld -EB -m elf32ppc -Bstatic --build-id -X -o .tmp_vmlinux1 -T > ./arch/powerpc/kernel/vmlinux.lds arch/powerpc/kernel/head_32.o > arch/powerpc/kernel/fpu.o arch/powerpc/kernel/vector.o > arch/powerpc/kernel/prom_init.o init/built-in.o --start-group > usr/built-in.o arch/powerpc/kernel/built-in.o arch/powerpc/mm/built-in.o > arch/powerpc/lib/built-in.o arch/powerpc/sysdev/built-in.o > arch/powerpc/platforms/built-in.o arch/powerpc/math-emu/built-in.o > arch/powerpc/crypto/built-in.o arch/powerpc/net/built-in.o > kernel/built-in.o certs/built-in.o mm/built-in.o fs/built-in.o > ipc/built-in.o security/built-in.o crypto/built-in.o block/built-in.o > lib/lib.a lib/built-in.o drivers/built-in.o sound/built-in.o > firmware/built-in.o net/built-in.o virt/built-in.o --end-group > arch/powerpc/platforms/built-in.o: In function `bootx_printf': > /usr/local/src/linux-git/arch/powerpc/platforms/powermac/bootx_init.c:88: undefined reference to `__stack_chk_fail_local' > arch/powerpc/platforms/built-in.o: In function `bootx_add_display_props': > /usr/local/src/linux-git/arch/powerpc/platforms/powermac/bootx_init.c:211: undefined reference to `__stack_chk_fail_local' > arch/powerpc/platforms/built-in.o: In function > `bootx_scan_dt_build_struct': > /usr/local/src/linux-git/arch/powerpc/platforms/powermac/bootx_init.c:350: undefined reference to `__stack_chk_fail_local' > arch/powerpc/platforms/built-in.o: In function `bootx_init': > /usr/local/src/linux-git/arch/powerpc/platforms/powermac/bootx_init.c:596: undefined reference to `__stack_chk_fail_local' > /usr/bin/ld.bfd.real: .tmp_vmlinux1: hidden symbol `__stack_chk_fail_local' isn't defined > /usr/bin/ld.bfd.real: final link failed: Bad value > ================================ > > > $ ld --version | head -1 > GNU ld (GNU Binutils for Debian) 2.25 > > $ gcc --version | head -1 > gcc-4.9.real (Debian 4.9.2-10) 4.9.2 > > > I'm regularly compiling userspace programs with -fstack-protector w/o > problems. I suspect it's either 6533b7c16ee5712041b4e324100550e02a9a5dda > ("powerpc: Initial stack protector (-fstack-protector) support") or > 902e06eb86cd62753974c249bd1dedae2825b430 ("powerpc/32: Change the stack > protector canary value per task") or both but I haven't started the > bisection yet. > > Any other ideas? > > Thanks, > Christian. > Using GCC 5.4.0, I don't have that issue. bootx_init.o only contains reference to __stack_chk_fail Looking a bit over internet, some people have reported having encountered that issue due to old object files not properly cleaned. Have you tried a 'make clean' or 'distclean' ? Christophe