Linux->Solaris2.6 cross compiler shared libs problem.

Linux->Solaris2.6 cross compiler shared libs problem.

[Joshua Kessinger]

After a modest amount of pain I built GCC 3.2.1 with
Binutils 2.13 sparc-solaris26 targeted linux x86
hosted cross compiler. Code compiles and links, but
the first time I tried to use a shared lib I get a
SIGSEGV.

I built a c based app using the following code:

#include <stdio.h>
#include <dlfcn.h>
#include <link.h>

int main (int argc, char ** argv)
{
	printf("hello\n");
	fflush(stdout);
	void * d = dlopen("./libgcc_s.so", RTLD_NOW);
	if (dlerror())
	{
		printf("%s\n", dlerror());
	}
	return 0;
}

which compiles and links a-ok from the Linux box. When
I reach the dlopen() I get a SIGSEGV with the
following backtrace.

#0  __register_frame_info_bases (begin=0xff260000,
ob=0xff260000, tbase=0x0, 
    dbase=0x0) at
../../gcc-3.1.1/gcc/unwind-dw2-fde.c:83
#1  0xff2616b0 in frame_dummy () from
/tools_solaris/lib/libgcc_s.so.1
#2  0xff261598 in _init () from
/tools_solaris/lib/libgcc_s.so.1
#3  0xff3bc1ec in ?? ()
#4  0xff3c0d34 in ?? ()
#5  0xff3c0e5c in ?? ()
#6  0x00010748 in main ()

I encountered the exact same issue with GCC 3.1.1
Binutils 2.13. Any ideas where I went wrong?

libgcc_s.so.1 is the gcc_s from the cross-compiler
build.

I configured the cross-compiler with
../gcc-3.2.1/configure --with-thread=solaris
--prefix=/tools_x_solaris/
--target=sparc-sun-solaris2.6 --with-gnu-as
--with-gnu-ld --with-libs=/tools_x_solaris/lib
--with-headers=/tools_x_solaris/include/
--enable-languages=c,c++,f77,objc --enable-shared -v
Thread model: posix
gcc version 3.2.1


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Pointer analysis on Tree vs. RTL intermediate forms

[Vadim Vaynerman]

Hi all,
I'm trying to decide weather to implement pointer analysis on GCC using
the RTL or the tree intermediate form. Does anybody know the
advantages/disadvantages of either one?

Also, is the optimization called scalar replacement of memory aggregates
done on the tree or RTL form?

Thanks,
Vadim