mips64 gcc 3.3.6 problem

[Sergey Anosov]

Hi all!

I've made a toolchain for mips64el - binutils 2.17.90 + gcc 3.3.6 + glibc 2.3.6.
I've successfully compile a linux 2.16.62 kernel and run it in qemu.
But when I try to execute dynamically compiled "Hello world" program - I' ve 
got a SIGSEGV"

do_page_fault() #2: sending SIGSEGV to a.out for invalid write access to
0056a7a7 (epc == 00558010, ra == 00557cd0)
@@@ do_page_fault
Segmentation fault

Statically linked executables are running without any problem!

If I use gcc 4.1.3 + glibc 2.7 + binutils 2.19 - everything ok.
I tried to install binutils 2.19 instead of binutils 2.17 (binutils 2.19, gcc 
3.3.6 and glibc 2.3.6) - and dynamically linked programs are running.

So, I think it is a compiler problem, isn'it?
Does anybody have such problem? Or mips64 platform and gcc 3.3.6 are not 
compatible?

Thanks!

gcc 3.3.6 and multilib

[Sergey Anosov]

Dear All,

I want to use multilib (EL/EB) in mips-unknown-linux-gcc.
So when I add some lines to gcc/config/mips/t-mips, it looks like gcc uses 
multilib.
[r...@st1 SPECS]# mips-vniins-linux-gcc -print-multi-lib
.;
el;@EL

But output of
mips-unknown-linux-gcc --print-search-dirs
and
mips-unknown-linux-gcc -mel --print-search-dirs
is the same.

Patch PR20425 from Alan Modra is for gcc 4.1.0. I've tried to apply this patch 
to gcc 3.3.6 source tree, but
the result was the same.

Is there any solution or patches for using multilib in gcc 3.3.6?

Re[2]: gcc 3.3.6 and multilib

[Sergey Anosov]

Yes, of course.

My gcc/config/mips/t-mips file:

FPBIT = fp-bit.c
DPBIT = dp-bit.c

$(T)crti.o: $(srcdir)/config/mips/crti.asm $(GCC_PASSES)
$(GCC_FOR_TARGET) $(GCC_CFLAGS) $(MULTILIB_CFLAGS) $(INCLUDES) \
-c -o $(T)crti.o -x assembler-with-cpp $(srcdir)/config/mips/crti.asm

$(T)crtn.o: $(srcdir)/config/mips/crtn.asm $(GCC_PASSES)
$(GCC_FOR_TARGET) $(GCC_CFLAGS) $(MULTILIB_CFLAGS) $(INCLUDES) \
-c -o $(T)crtn.o -x assembler-with-cpp $(srcdir)/config/mips/crtn.asm


MULTILIB_OPTIONS = EB/EL
MULTILIB_DIRNAMES = eb el
MULTILIB_MATCHES = mel=EL meb=EB
EXTRA_MULTILIB_PARTS = crtbegin.o crtend.o crti.o crtn.o crtbeginS.o crtendS.o

LIBGCC = stmp-multilib
INSTALL_LIBGCC = install-multilib

dp-bit.c: $(srcdir)/config/fp-bit.c
echo '#ifdef __MIPSEL__' > dp-bit.c
echo '#define FLOAT_BIT_ORDER_MISMATCH' >> dp-bit.c
echo '#endif' >> dp-bit.c
cat $(srcdir)/config/fp-bit.c >> dp-bit.c

fp-bit.c: $(srcdir)/config/fp-bit.c
echo '#define FLOAT' > fp-bit.c
echo '#ifdef __MIPSEL__' >> fp-bit.c
echo '#define FLOAT_BIT_ORDER_MISMATCH' >> fp-bit.c
echo '#endif' >> fp-bit.c
cat $(srcdir)/config/fp-bit.c >> fp-bit.c

Re: gcc 3.3.6 and multilib

[Sergey Anosov]

The problem was not in the patch, which I've applied. Patch is good. The 
problem was in t-mips config file.
Now I have a gcc 3.3.6 compiler working with  multilib correctly.
Thanks