https://sourceware.org/bugzilla/show_bug.cgi?id=22512
Bug ID: 22512
Summary: lm32 fdpic toolchain segfault with binutils ld
Product: binutils
Version: 2.30 (HEAD)
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: binutils
Assignee: unassigned at sourceware dot org
Reporter: wbx at openadk dot org
Target Milestone: ---
When trying to cross-compile Linux and uClibc-ng for lm32
binutils ld segfaults.
Support for FDPIC binary format seems to be the default in binutils/gcc.
Linux kernel support is not upstream, you can find the used
source here:
https://github.com/m-labs/linux-milkymist.git
When the kernel is linked I get a segmentation fault:
/home/wbx/lm32/toolchain_qemu-lm32_uclibc-ng/usr/bin/lm32-openadk-uclinux-uclibc-ld:
BFD (GNU Binutils) 2.29.51.20171028 assertion fail elf32-lm32.c:902
Before that there are a lot of warnings:
/home/wbx/lm32/toolchain_qemu-lm32_uclibc-ng/usr/bin/lm32-openadk-uclinux-uclibc-ld:
Warning: size of symbol `sys_getpeername' changed from 8 in
kernel/built-in.o to 192 in net/built-in.o
wbx@chrom:~/lm32$ gdb
./toolchain_qemu-lm32_uclibc-ng/usr/bin/lm32-openadk-uclinux-uclibc-ld.bfd core
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Reading symbols from
./toolchain_qemu-lm32_uclibc-ng/usr/bin/lm32-openadk-uclinux-uclibc-ld.bfd...done.
warning: core file may not match specified executable file.
[New LWP 4126]
Core was generated by
`/home/wbx/lm32/toolchain_qemu-lm32_uclibc-ng/usr/bin/lm32-openadk-uclinux-uclib'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x0000560650c0aebb in lm32_elf_relocate_section
(output_bfd=0x560652c1ff30, info=0x560650f05600 <link_info>,
input_bfd=0x560652c30730, input_section=0x560652c31910,
contents=0x7f5fd93a1010 "7\234\377\324[\213",
relocs=0x7f5fd9332010, local_syms=0x5606530ff320,
local_sections=0x560653123490) at elf32-lm32.c:938
938 bfd_put_32 (output_bfd,
relocation,
(gdb) bt
#0 0x0000560650c0aebb in lm32_elf_relocate_section
(output_bfd=0x560652c1ff30, info=0x560650f05600 <link_info>,
input_bfd=0x560652c30730, input_section=0x560652c31910,
contents=0x7f5fd93a1010 "7\234\377\324[\213",
relocs=0x7f5fd9332010, local_syms=0x5606530ff320,
local_sections=0x560653123490) at elf32-lm32.c:938
#1 0x0000560650c43c7f in elf_link_input_bfd (flinfo=0x7ffcae689c20,
input_bfd=0x560652c30730) at elflink.c:10633
#2 0x0000560650c46df0 in bfd_elf_final_link (abfd=0x560652c1ff30,
info=0x560650f05600 <link_info>) at elflink.c:11944
#3 0x0000560650bdede0 in ldwrite () at ldwrite.c:577
#4 0x0000560650bdbf87 in main (argc=28, argv=0x7ffcae68a028) at
./ldmain.c:448
(gdb) quit
wbx@chrom:~/lm32$
./toolchain_qemu-lm32_uclibc-ng/usr/bin/lm32-openadk-uclinux-uclibc-gcc
-v
Using built-in specs.
COLLECT_GCC=./toolchain_qemu-lm32_uclibc-ng/usr/bin/lm32-openadk-uclinux-uclibc-gcc
COLLECT_LTO_WRAPPER=/home/wbx/lm32/toolchain_qemu-lm32_uclibc-ng/usr/libexec/gcc/lm32-openadk-uclinux-uclibc/7.2.0/lto-wrapper
Target: lm32-openadk-uclinux-uclibc
Configured with:
/home/wbx/lm32/toolchain_build_qemu-lm32_uclibc-ng/w-gcc-7.2.0-1/gcc-7.2.0/configure
--prefix=/home/wbx/lm32/toolchain_qemu-lm32_uclibc-ng/usr
--with-bugurl=http://www.openadk.org/ --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=lm32-openadk-uclinux-uclibc
--with-gmp=/home/wbx/lm32/host_x86_64-linux-gnu/usr
--with-mpfr=/home/wbx/lm32/host_x86_64-linux-gnu/usr
--disable-__cxa_atexit --with-system-zlib --with-gnu-ld
--with-gnu-as --disable-libsanitizer --disable-install-libiberty
--disable-libitm --disable-libmudflap --disable-libgomp
--disable-libmpx --disable-libcilkrts --disable-libquadmath
--disable-libquadmath-support --disable-decimal-float
--disable-libstdcxx-pch --disable-ppl-version-check
--disable-cloog-version-check --without-ppl --without-cloog
--without-isl --disable-werror --disable-nls --disable-lto
--disable-tls --disable-threads --disable-libatomic --disable-shared
--disable-libssp --disable-biarch --disable-multilib
--enable-languages=c
--with-build-sysroot='/../../target_qemu-lm32_uclibc-ng'
--with-sysroot='/../../target_qemu-lm32_uclibc-ng'
Thread model: single
gcc version 7.2.0 (GCC)
./toolchain_qemu-lm32_uclibc-ng/usr/bin/lm32-openadk-uclinux-uclibc-ld
-v
GNU ld (GNU Binutils) 2.29.51.20171028 -v
Applications like busybox are compiling fine.
I am not sure how to provide a simple testcase.
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