gcc-4.5.3 cross-compiled for ARM generates a misaligned relocation for __gxx_personality_v0 in libstdc++.

This was found when running Mozilla Fennec, but also occurs with trivial programs linked against libstdc++ such as Hello World.

C file hello.c contains:

#include <stdio.h>
int main(void)
{
printf("hello world\n");
return (0);
}

Compiled on an x86_64 host as follows:

% arm-softfloat-linux-gnueabi-gcc -o hello hello.c -lstdc++
% 

Run on an ARM target (iPAQ hx4700) produces the following:

# ./hello
Bus error
# 

Adding ld.so debug produces the following:

# export LD_DEBUG=all
# ./hello
<snip>
       682:     
       682:     relocation processing: /lib/libstdc++.so.6 (lazy)
       682:     symbol=__gxx_personality_v0;  lookup in file=./hello [0]
       682:     symbol=__gxx_personality_v0;  lookup in file=/lib/libstdc++.so.6 [0]
       682:     binding file /lib/libstdc++.so.6 [0] to /lib/libstdc++.so.6 [0]: normal symbol `__gxx_personality_v0' [CXXABI_1.3]
Bus error
# 

Running objdump on the host shows the misaligned symbol:

% arm-softfloat-linux-gnueabi-objdump -R /usr/lib/gcc/arm-softfloat-linux-gnueabi/4.5.3/libstdc++.so.6.0.14 | fgrep __gxx_personality_v0
00107afb R_ARM_ABS32       __gxx_personality_v0
00124848 R_ARM_JUMP_SLOT   __gxx_personality_v0
% 

The version information returned by gcc-4.5.3 is the following:

% arm-softfloat-linux-gnueabi-gcc -v
Using built-in specs.
COLLECT_GCC=/usr/x86_64-pc-linux-gnu/arm-softfloat-linux-gnueabi/gcc-bin/4.5.3/arm-softfloat-linux-gnueabi-gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/arm-softfloat-linux-gnueabi/4.5.3/lto-wrapper
Target: arm-softfloat-linux-gnueabi
Configured with: /var/tmp/portage/cross-arm-softfloat-linux-gnueabi/gcc-4.5.3-r1/work/gcc-4.5.3/configure --prefix=/usr --bindir=/usr/x86_64-pc-linux-gnu/arm-softfloat-linux-gnueabi/gcc-bin/4.5.3 --includedir=/usr/lib/gcc/arm-softfloat-linux-gnueabi/4.5.3/include --datadir=/usr/share/gcc-data/arm-softfloat-linux-gnueabi/4.5.3 --mandir=/usr/share/gcc-data/arm-softfloat-linux-gnueabi/4.5.3/man --infodir=/usr/share/gcc-data/arm-softfloat-linux-gnueabi/4.5.3/info --with-gxx-include-dir=/usr/lib/gcc/arm-softfloat-linux-gnueabi/4.5.3/include/g++-v4 --host=x86_64-pc-linux-gnu --target=arm-softfloat-linux-gnueabi --build=x86_64-pc-linux-gnu --disable-altivec --disable-fixed-point --without-ppl --without-cloog --disable-lto --with-float=soft --disable-nls --with-system-zlib --disable-werror --enable-secureplt --disable-multilib --enable-libmudflap --disable-libssp --disable-libgomp --with-python-dir=/share/gcc-data/arm-softfloat-linux-gnueabi/4.5.3/python --enable-checking=release --disable-libgcj --enable-languages=c,c++ --with-sysroot=/usr/arm-softfloat-linux-gnueabi --disable-bootstrap --enable-__cxa_atexit --enable-clocale=gnu --with-bugurl=http://bugs.gentoo.org/ --with-pkgversion='Gentoo 4.5.3-r1 p1.0, pie-0.4.5'
Thread model: posix
gcc version 4.5.3 (Gentoo 4.5.3-r1 p1.0, pie-0.4.5) 
%