nuttx: RISC-V linker fail, relocation truncated to fit: R_RISCV_HI20

When I try to compile nuttx hash: f39de6fd1a config: rv-virt:smp64 tookchain: riscv64-unknown-elf-gcc (g2ee5e430018) 12.2.0

riscv64-unknown-elf-ld: warning: /home/ubuntu/nuttxSpace/nuttx/nuttx has a LOAD segment with RWX permissions
/opt/riscv/lib/gcc/riscv64-unknown-elf/12.2.0/libgcc.a(_clzsi2.o): in function `__clzdi2':
/home/ubuntu/riscv-gnu-toolchain/build-gcc-newlib-stage2/riscv64-unknown-elf/libgcc/../../.././gcc/libgcc/libgcc2.c:690:(.text+0x18): relocation truncated to fit: R_RISCV_HI20 against symbol `__clz_tab' defined in .rodata section in /opt/riscv/lib/gcc/riscv64-unknown-elf/12.2.0/libgcc.a(_clz.o)

Does anyone meet this problem?

About this issue

Original URL
State: closed
Created 10 months ago
Reactions: 1
Comments: 23 (23 by maintainers)

Most upvoted comments

If you do not need to compile C++ code then you can use the latest toolchain from https://github.com/sifive/freedom-tools/releases

pkarashchenko on Sep 16, 2023

@no1wudi I found this message under xPack v12.1.0.2, does it mean that -mcmodel=medany is already selected?

https://xpack.github.io/blog/2022/05/18/riscv-none-elf-gcc-v12-1-0-2-released/#-mcmodelmedany

The libraries are compiled with -O2 -mcmodel=medany. The nano version is compiled with -Os -mcmodel=medany.

Thanks for your notifacation, maybe we can consider to use xPack’s toolchain for risc-v in CI.

no1wudi on Sep 18, 2023

@lupyuen libm issue could be fixed by select from nuttx, newlib, libmcs and openlibm if toolchain doesn’t provide one: https://github.com/apache/nuttx/blob/master/libs/libm/Kconfig#L6-L61

xiaoxiang781216 on Sep 18, 2023

xPack’s toolchain may not fix this problem, I got its compile configurations by --verbose:

riscv-none-elf-gcc --verbose
Using built-in specs.
COLLECT_GCC=./riscv-none-elf-gcc
COLLECT_LTO_WRAPPER=/workspaces/xpack-riscv-none-elf-gcc-13.2.0-1/bin/../libexec/gcc/riscv-none-elf/13.2.0/lto-wrapper
Target: riscv-none-elf
Configured with: /__w/riscv-none-elf-gcc-xpack/riscv-none-elf-gcc-xpack/build/linux-x64/sources/gcc-13.2.0/configure --prefix=/__w/riscv-none-elf-gcc-xpack/riscv-none-elf-gcc-xpack/build/linux-x64/application --with-sysroot=/__w/riscv-none-elf-gcc-xpack/riscv-none-elf-gcc-xpack/build/linux-x64/application/riscv-none-elf --with-native-system-header-dir=/include --infodir=/__w/riscv-none-elf-gcc-xpack/riscv-none-elf-gcc-xpack/build/linux-x64/x86_64-pc-linux-gnu/install/share/info --mandir=/__w/riscv-none-elf-gcc-xpack/riscv-none-elf-gcc-xpack/build/linux-x64/x86_64-pc-linux-gnu/install/share/man --htmldir=/__w/riscv-none-elf-gcc-xpack/riscv-none-elf-gcc-xpack/build/linux-x64/x86_64-pc-linux-gnu/install/share/html --pdfdir=/__w/riscv-none-elf-gcc-xpack/riscv-none-elf-gcc-xpack/build/linux-x64/x86_64-pc-linux-gnu/install/share/pdf --build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu --target=riscv-none-elf --disable-libgomp --disable-libmudflap --disable-libquadmath --disable-libsanitizer --disable-libssp --disable-nls --disable-shared --disable-threads --disable-tls --enable-checking=release --enable-languages=c,c++,fortran --with-gmp=/__w/riscv-none-elf-gcc-xpack/riscv-none-elf-gcc-xpack/build/linux-x64/x86_64-pc-linux-gnu/install --with-newlib --with-pkgversion='xPack GNU RISC-V Embedded GCC x86_64' --with-gnu-as --with-gnu-ld --with-system-zlib --with-abi=ilp32 --with-arch=rv32imac --enable-multilib
Thread model: single
Supported LTO compression algorithms: zlib zstd
gcc version 13.2.0 (xPack GNU RISC-V Embedded GCC x86_64)

The toolchain from Ubuntu/Debian may works since it compiled with -mcmodel=medany but it lacks of libm:

Using built-in specs.
COLLECT_GCC=riscv64-unknown-elf-gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/riscv64-unknown-elf/9.3.0/lto-wrapper
Target: riscv64-unknown-elf
Configured with: ../configure --build=x86_64-linux-gnu --prefix=/usr --includedir='/usr/include' --mandir='/usr/share/man' --infodir='/usr/share/info' --sysconfdir=/etc --localstatedir=/var --disable-silent-rules --libdir='/usr/lib/x86_64-linux-gnu' --libexecdir='/usr/lib/x86_64-linux-gnu' --disable-maintainer-mode --disable-dependency-tracking --target=riscv64-unknown-elf --prefix=/usr --infodir=/usr/share/doc/gcc-riscv64-unknown-elf/info --mandir=/usr/share/man --htmldir=/usr/share/doc/gcc-riscv64-unknown-elf/html --pdfdir=/usr/share/doc/gcc-riscv64-unknown-elf/pdf --bindir=/usr/bin --libexecdir=/usr/lib --libdir=/usr/lib --with-pkgversion= --disable-shared --disable-threads --enable-languages=c,c++ --enable-tls --with-newlib --with-native-system-header-dir=/include --disable-libmudflap --disable-libssp --disable-libquadmath --disable-libgomp --disable-nls --with-system-zlib --enable-checking=yes --enable-multilib --with-abi=lp64d --disable-libstdcxx-pch --disable-libstdcxx --disable-fixinc --with-arch=rv64imafdc --with-gnu-as --with-gnu-ld --with-as=/usr/lib/riscv64-unknown-elf/bin/as --with-ld=/usr/lib/riscv64-unknown-elf/bin/ld AR_FOR_TARGET=/usr/lib/riscv64-unknown-elf/bin/ar AS_FOR_TARGET=/usr/lib/riscv64-unknown-elf/bin/as NM_FOR_TARGET=/usr/lib/riscv64-unknown-elf/bin/nm LD_FOR_TARGET=/usr/lib/riscv64-unknown-elf/bin/ld OBJDUMP_FOR_TARGET=/usr/lib/riscv64-unknown-elf/bin/objdump RANLIB_FOR_TARGET=/usr/lib/riscv64-unknown-elf/bin/ranlib READELF_FOR_TARGET=/usr/lib/riscv64-unknown-elf/bin/readelf STRIP_FOR_TARGET=/usr/lib/riscv64-unknown-elf/bin/strip CFLAGS='-g -O2 -fdebug-prefix-map=/build/gcc-riscv64-unknown-elf-3seJsn/gcc-riscv64-unknown-elf-9.3.0=. -fstack-protector-strong' CPPFLAGS='-Wdate-time -D_FORTIFY_SOURCE=2' CXXFLAGS='-g -O2 -fdebug-prefix-map=/build/gcc-riscv64-unknown-elf-3seJsn/gcc-riscv64-unknown-elf-9.3.0=. -fstack-protector-strong' FCFLAGS='-g -O2 -fdebug-prefix-map=/build/gcc-riscv64-unknown-elf-3seJsn/gcc-riscv64-unknown-elf-9.3.0=. -fstack-protector-strong' FFLAGS='-g -O2 -fdebug-prefix-map=/build/gcc-riscv64-unknown-elf-3seJsn/gcc-riscv64-unknown-elf-9.3.0=. -fstack-protector-strong' GCJFLAGS='-g -O2 -fdebug-prefix-map=/build/gcc-riscv64-unknown-elf-3seJsn/gcc-riscv64-unknown-elf-9.3.0=. -fstack-protector-strong' LDFLAGS='-Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,now' OBJCFLAGS='-g -O2 -fdebug-prefix-map=/build/gcc-riscv64-unknown-elf-3seJsn/gcc-riscv64-unknown-elf-9.3.0=. -fstack-protector-strong' OBJCXXFLAGS='-g -O2 -fdebug-prefix-map=/build/gcc-riscv64-unknown-elf-3seJsn/gcc-riscv64-unknown-elf-9.3.0=. -fstack-protector-strong' 'CFLAGS_FOR_TARGET=-Os -mcmodel=medany' 'CXXFLAGS_FOR_TARGET=-Os -mcmodel=medany'
Thread model: single
gcc version 9.3.0 ()

no1wudi on Sep 18, 2023

I downloaded and installed the same toolchain and am able to reproduce an issue. I think the case is that toolchain is build without support of medany model as riscv64-unknown-elf-gcc -v outputs

Using built-in specs.
COLLECT_GCC=riscv64-unknown-elf-gcc
COLLECT_LTO_WRAPPER=/usr/share/riscv64-elf-gcc-nightly-2023.09.13/bin/../libexec/gcc/riscv64-unknown-elf/12.2.0/lto-wrapper
Target: riscv64-unknown-elf
Configured with: /home/runner/work/riscv-gnu-toolchain/riscv-gnu-toolchain/gcc/configure --target=riscv64-unknown-elf --prefix=/opt/riscv --disable-shared --disable-threads --enable-languages=c,c++ --with-pkgversion= --with-system-zlib --enable-tls --with-newlib --with-sysroot=/opt/riscv/riscv64-unknown-elf --with-native-system-header-dir=/include --disable-libmudflap --disable-libssp --disable-libquadmath --disable-libgomp --disable-nls --disable-tm-clone-registry --src=.././gcc --disable-multilib --with-abi=lp64d --with-arch=rv64gc --with-tune=rocket --with-isa-spec=20191213 'CFLAGS_FOR_TARGET=-Os    -mcmodel=medlow' 'CXXFLAGS_FOR_TARGET=-Os    -mcmodel=medlow'
Thread model: single
Supported LTO compression algorithms: zlib
gcc version 12.2.0 ()

I think the best would be to use toolchain from https://github.com/apache/nuttx/pull/10306

pkarashchenko on Sep 15, 2023