[Bug binutils/22512] New: lm32 fdpic toolchain segfault with binutils ld

[wbx at openadk dot org]

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                                      

address@hidden:~/lm32$ gdb                                                      
     
./toolchain_qemu-lm32_uclibc-ng/usr/bin/lm32-openadk-uclinux-uclibc-ld.bfd core 
GNU gdb (Debian 7.12-6) 7.12.0.20161007-git                                     
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<http://gnu.org/licenses/gpl.html>                                              
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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                                                                      

address@hidden:~/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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