Buildresult: powerpc-next/ppc40x_defconfig/powerpc-gcc8 built on Nov 25 2019, 20:41

kisskb

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Status:	OK
Date/Time:	Nov 25 2019, 20:41
Duration:	0:01:04.164117
Builder:	blade46
Revision:	powerpc/prom_init: Use -ffreestanding to avoid a reference to bcmp (`324332cb5445aa6470fe57ba6ddcfbc9504958e2)`
Target:	powerpc-next/ppc40x_defconfig/powerpc-gcc8
Branch:	powerpc-next
Compiler:	powerpc-gcc8 (powerpc64-linux-gcc (GCC) 8.1.0 / GNU ld (GNU Binutils) 2.30)
Config:	ppc40x_defconfig (download)
Log:	Download original Possible warnings (1) arch/powerpc/kernel/head_40x.S:802: Warning: invalid register expression Full Log # git rev-parse -q --verify 324332cb5445aa6470fe57ba6ddcfbc9504958e2^{commit} 324332cb5445aa6470fe57ba6ddcfbc9504958e2 already have revision, skipping fetch # git checkout -q -f -B kisskb 324332cb5445aa6470fe57ba6ddcfbc9504958e2 # git clean -qxdf # < git log -1 # commit 324332cb5445aa6470fe57ba6ddcfbc9504958e2 # Author: Nathan Chancellor <natechancellor@gmail.com> # Date: Mon Nov 18 21:57:12 2019 -0700 # # powerpc/prom_init: Use -ffreestanding to avoid a reference to bcmp # # LLVM revision r374662 gives LLVM the ability to convert certain loops # into a reference to bcmp as an optimization; this breaks # prom_init_check.sh: # # CALL arch/powerpc/kernel/prom_init_check.sh # Error: External symbol 'bcmp' referenced from prom_init.c # make[2]: *** [arch/powerpc/kernel/Makefile:196: prom_init_check] Error 1 # # bcmp is defined in lib/string.c as a wrapper for memcmp so this could # be added to the whitelist. However, commit # 450e7dd4001f ("powerpc/prom_init: don't use string functions from # lib/") copied memcmp as prom_memcmp to avoid KASAN instrumentation so # having bcmp be resolved to regular memcmp would break that assumption. # Furthermore, because the compiler is the one that inserted bcmp, we # cannot provide something like prom_bcmp. # # To prevent LLVM from being clever with optimizations like this, use # -ffreestanding to tell LLVM we are not hosted so it is not free to # make transformations like this. # # Reviewed-by: Nick Desaulneris <ndesaulniers@google.com> # Signed-off-by: Nathan Chancellor <natechancellor@gmail.com> # Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> # Link: https://lore.kernel.org/r/20191119045712.39633-4-natechancellor@gmail.com # < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version # < git log --format=%s --max-count=1 324332cb5445aa6470fe57ba6ddcfbc9504958e2 # < make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-next_ppc40x_defconfig_powerpc-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux- ppc40x_defconfig # make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-next_ppc40x_defconfig_powerpc-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux- /kisskb/src/arch/powerpc/kernel/head_40x.S: Assembler messages: /kisskb/src/arch/powerpc/kernel/head_40x.S:802: Warning: invalid register expression INFO: Uncompressed kernel (size 0x5c7a44) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x5c7a44) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x5b7364) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x5c7a44) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x5c7a44) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) Image Name: Linux-5.4.0-rc2-g324332cb5445 Created: Mon Nov 25 20:42:52 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2872731 Bytes = 2805.40 KiB = 2.74 MiB Load Address: 00000000 Entry Point: 00000000 Image Name: Linux-5.4.0-rc2-g324332cb5445 Created: Mon Nov 25 20:42:52 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2910924 Bytes = 2842.70 KiB = 2.78 MiB Load Address: 00600000 Entry Point: 00601860 Image Name: Linux-5.4.0-rc2-g324332cb5445 Created: Mon Nov 25 20:42:53 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2911784 Bytes = 2843.54 KiB = 2.78 MiB Load Address: 00600000 Entry Point: 00601ad4 Completed OK # rm -rf /kisskb/build/powerpc-next_ppc40x_defconfig_powerpc-gcc8 # Build took: 0:01:04.164117

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