为什么我的内核会立即重置我的机器？
Why is my kernel resetting my machine immediately?
我正在使用 Buildroot 2020.02.1 为安装了 AMD GX-222GC SOC 的 PC 构建自定义内核。
默认的外部工具链是来自 CodeBench 的 amd-2016.11-19。使用该工具链构建的内核可以正确启动。
相反，如果我使用 buildroot 自动构建的工具链构建相同的内核、相同的配置，内核不会启动！甚至没有内核恐慌，机器只是重置。
很明显问题与工具链有关。
这些是 gcc -v
的结果
CodeBench:
$ output/host/usr/bin/x86_64-amd-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/media/AAA/tmp/buildroot_toolchain/output/host/opt/ext-toolchain/bin/x86_64-amd-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/media/AAA/tmp/buildroot_toolchain/output/host/opt/ext-toolchain/bin/../libexec/gcc/x86_64-amd-linux-gnu/6.2.0/lto-wrapper
Target: x86_64-amd-linux-gnu
Configured with: /scratch/jmyers/amd-lite/src/gcc-6-2016.11/configure --build=i686-pc-linux-gnu --host=i686-pc-linux-gnu --target=x86_64-amd-linux-gnu --enable-threads --disable-libmudflap --disable-libstdcxx-pch --enable-extra-sgxxlite-multilibs --with-arch=btver2 --with-cpu=btver2 --with-gnu-as --with-gnu-ld --with-specs='-D__CS_SOURCERYGXX_MAJ__=2016 -D__CS_SOURCERYGXX_MIN__=11 -D__CS_SOURCERYGXX_REV__=19' --enable-languages=c,c++ --enable-shared --enable-lto --enable-symvers=gnu --enable-__cxa_atexit --with-glibc-version=2.24 --with-pkgversion='Sourcery CodeBench Lite 2016.11-19' --with-bugurl=https://sourcery.mentor.com/GNUToolchain/ --disable-nls --prefix=/opt/codesourcery --with-sysroot=/opt/codesourcery/x86_64-amd-linux-gnu/libc --with-build-sysroot=/scratch/jmyers/amd-lite/install/opt/codesourcery/x86_64-amd-linux-gnu/libc --with-gmp=/scratch/jmyers/amd-lite/obj/pkg-2016.11-19-x86_64-amd-linux-gnu/amd-2016.11-19-x86_64-amd-linux-gnu.extras/host-libs-i686-pc-linux-gnu/usr --with-mpfr=/scratch/jmyers/amd-lite/obj/pkg-2016.11-19-x86_64-amd-linux-gnu/amd-2016.11-19-x86_64-amd-linux-gnu.extras/host-libs-i686-pc-linux-gnu/usr --with-mpc=/scratch/jmyers/amd-lite/obj/pkg-2016.11-19-x86_64-amd-linux-gnu/amd-2016.11-19-x86_64-amd-linux-gnu.extras/host-libs-i686-pc-linux-gnu/usr --with-isl=/scratch/jmyers/amd-lite/obj/pkg-2016.11-19-x86_64-amd-linux-gnu/amd-2016.11-19-x86_64-amd-linux-gnu.extras/host-libs-i686-pc-linux-gnu/usr --enable-libgomp --enable-libitm --enable-libatomic --disable-libssp --disable-libcc1 --enable-poison-system-directories --with-python-dir=x86_64-amd-linux-gnu/share/gdb/python --with-build-time-tools=/scratch/jmyers/amd-lite/install/opt/codesourcery/x86_64-amd-linux-gnu/bin --with-build-time-tools=/scratch/jmyers/amd-lite/install/opt/codesourcery/x86_64-amd-linux-gnu/bin SED=sed
Thread model: posix
gcc version 6.2.0 (Sourcery CodeBench Lite 2016.11-19)
Buildroot:
Using built-in specs.
COLLECT_GCC=/media/AAA/tmp/buildroot_toolchain/output/host/opt/ext-toolchain/bin/x86_64-linux-gcc.br_real
COLLECT_LTO_WRAPPER=/media/AAA/tmp/buildroot_toolchain/output/host/opt/ext-toolchain/bin/../libexec/gcc/x86_64-buildroot-linux-gnu/7.5.0/lto-wrapper
Target: x86_64-buildroot-linux-gnu
Configured with: ./configure --prefix=/media/AAA/tmp/buildroot_toolchain/output/host --sysconfdir=/media/AAA/tmp/buildroot_toolchain/output/host/etc --enable-static --target=x86_64-buildroot-linux-gnu --with-sysroot=/media/AAA/tmp/buildroot_toolchain/output/host/x86_64-buildroot-linux-gnu/sysroot --enable-__cxa_atexit --with-gnu-ld --disable-libssp --disable-multilib --disable-decimal-float --with-gmp=/media/AAA/tmp/buildroot_toolchain/output/host --with-mpc=/media/AAA/tmp/buildroot_toolchain/output/host --with-mpfr=/media/AAA/tmp/buildroot_toolchain/output/host --with-pkgversion='Buildroot 2020.02.1-00007-g345f377da1-dirty' --with-bugurl=http://bugs.buildroot.net/ --enable-libquadmath --enable-tls --enable-threads --without-isl --without-cloog --with-arch=btver2 --enable-languages=c,c++ --with-build-time-tools=/media/AAA/tmp/buildroot_toolchain/output/host/x86_64-buildroot-linux-gnu/bin --enable-shared --disable-libgomp
Thread model: posix
gcc version 7.5.0 (Buildroot 2020.02.1-00007-g345f377da1-dirty)
您是否看到缺少 gcc 和 buildroot 工具链可能需要的一些选项？
提前致谢。
PS: 我什至试过 gcc 8 都没有解决。
早期的 4.4.x 内核在使用 binutils >= 2.31 构建时无法启动。这已在 4.4.x 稳定分支中的提交 https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=073bb7ddd35ca8f17a170258dacbe384935a43c8 中修复，该分支已在 4.4.124 中合并。因此任何早于 4.4.x 的版本，当使用 binutils >= 2.31 构建时，将无法启动。
我正在使用 Buildroot 2020.02.1 为安装了 AMD GX-222GC SOC 的 PC 构建自定义内核。
默认的外部工具链是来自 CodeBench 的 amd-2016.11-19。使用该工具链构建的内核可以正确启动。 相反，如果我使用 buildroot 自动构建的工具链构建相同的内核、相同的配置，内核不会启动！甚至没有内核恐慌，机器只是重置。
很明显问题与工具链有关。
这些是 gcc -v
的结果CodeBench:
$ output/host/usr/bin/x86_64-amd-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/media/AAA/tmp/buildroot_toolchain/output/host/opt/ext-toolchain/bin/x86_64-amd-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/media/AAA/tmp/buildroot_toolchain/output/host/opt/ext-toolchain/bin/../libexec/gcc/x86_64-amd-linux-gnu/6.2.0/lto-wrapper
Target: x86_64-amd-linux-gnu
Configured with: /scratch/jmyers/amd-lite/src/gcc-6-2016.11/configure --build=i686-pc-linux-gnu --host=i686-pc-linux-gnu --target=x86_64-amd-linux-gnu --enable-threads --disable-libmudflap --disable-libstdcxx-pch --enable-extra-sgxxlite-multilibs --with-arch=btver2 --with-cpu=btver2 --with-gnu-as --with-gnu-ld --with-specs='-D__CS_SOURCERYGXX_MAJ__=2016 -D__CS_SOURCERYGXX_MIN__=11 -D__CS_SOURCERYGXX_REV__=19' --enable-languages=c,c++ --enable-shared --enable-lto --enable-symvers=gnu --enable-__cxa_atexit --with-glibc-version=2.24 --with-pkgversion='Sourcery CodeBench Lite 2016.11-19' --with-bugurl=https://sourcery.mentor.com/GNUToolchain/ --disable-nls --prefix=/opt/codesourcery --with-sysroot=/opt/codesourcery/x86_64-amd-linux-gnu/libc --with-build-sysroot=/scratch/jmyers/amd-lite/install/opt/codesourcery/x86_64-amd-linux-gnu/libc --with-gmp=/scratch/jmyers/amd-lite/obj/pkg-2016.11-19-x86_64-amd-linux-gnu/amd-2016.11-19-x86_64-amd-linux-gnu.extras/host-libs-i686-pc-linux-gnu/usr --with-mpfr=/scratch/jmyers/amd-lite/obj/pkg-2016.11-19-x86_64-amd-linux-gnu/amd-2016.11-19-x86_64-amd-linux-gnu.extras/host-libs-i686-pc-linux-gnu/usr --with-mpc=/scratch/jmyers/amd-lite/obj/pkg-2016.11-19-x86_64-amd-linux-gnu/amd-2016.11-19-x86_64-amd-linux-gnu.extras/host-libs-i686-pc-linux-gnu/usr --with-isl=/scratch/jmyers/amd-lite/obj/pkg-2016.11-19-x86_64-amd-linux-gnu/amd-2016.11-19-x86_64-amd-linux-gnu.extras/host-libs-i686-pc-linux-gnu/usr --enable-libgomp --enable-libitm --enable-libatomic --disable-libssp --disable-libcc1 --enable-poison-system-directories --with-python-dir=x86_64-amd-linux-gnu/share/gdb/python --with-build-time-tools=/scratch/jmyers/amd-lite/install/opt/codesourcery/x86_64-amd-linux-gnu/bin --with-build-time-tools=/scratch/jmyers/amd-lite/install/opt/codesourcery/x86_64-amd-linux-gnu/bin SED=sed
Thread model: posix
gcc version 6.2.0 (Sourcery CodeBench Lite 2016.11-19)
Buildroot:
Using built-in specs.
COLLECT_GCC=/media/AAA/tmp/buildroot_toolchain/output/host/opt/ext-toolchain/bin/x86_64-linux-gcc.br_real
COLLECT_LTO_WRAPPER=/media/AAA/tmp/buildroot_toolchain/output/host/opt/ext-toolchain/bin/../libexec/gcc/x86_64-buildroot-linux-gnu/7.5.0/lto-wrapper
Target: x86_64-buildroot-linux-gnu
Configured with: ./configure --prefix=/media/AAA/tmp/buildroot_toolchain/output/host --sysconfdir=/media/AAA/tmp/buildroot_toolchain/output/host/etc --enable-static --target=x86_64-buildroot-linux-gnu --with-sysroot=/media/AAA/tmp/buildroot_toolchain/output/host/x86_64-buildroot-linux-gnu/sysroot --enable-__cxa_atexit --with-gnu-ld --disable-libssp --disable-multilib --disable-decimal-float --with-gmp=/media/AAA/tmp/buildroot_toolchain/output/host --with-mpc=/media/AAA/tmp/buildroot_toolchain/output/host --with-mpfr=/media/AAA/tmp/buildroot_toolchain/output/host --with-pkgversion='Buildroot 2020.02.1-00007-g345f377da1-dirty' --with-bugurl=http://bugs.buildroot.net/ --enable-libquadmath --enable-tls --enable-threads --without-isl --without-cloog --with-arch=btver2 --enable-languages=c,c++ --with-build-time-tools=/media/AAA/tmp/buildroot_toolchain/output/host/x86_64-buildroot-linux-gnu/bin --enable-shared --disable-libgomp
Thread model: posix
gcc version 7.5.0 (Buildroot 2020.02.1-00007-g345f377da1-dirty)
您是否看到缺少 gcc 和 buildroot 工具链可能需要的一些选项？
提前致谢。
PS: 我什至试过 gcc 8 都没有解决。
早期的 4.4.x 内核在使用 binutils >= 2.31 构建时无法启动。这已在 4.4.x 稳定分支中的提交 https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=073bb7ddd35ca8f17a170258dacbe384935a43c8 中修复，该分支已在 4.4.124 中合并。因此任何早于 4.4.x 的版本，当使用 binutils >= 2.31 构建时，将无法启动。