ProPolice symbols in libc or libssp ?
joerg at britannica.bec.de
Thu Jul 28 22:32:38 GMT 2005
On Fri, Jul 29, 2005 at 12:14:47AM +0200, Jeremie Le Hen wrote:
> > Make sure you patch the right place and _not_ the shared part. Does the
> > attached patch work for you?
> Yes, this worked, thank you ! This implies that libssp must be linked
> with -nodefaultlibs option to avoid linking itself against libssp. But
> this also prevents it from being linked against libgcc. Is it
> something harmful or not (in other words should I manually add -lgcc to
> LDFLAGS) ?
The problem with linking -lssp is that you normally want to aovid the
circular dependency with libc. For static libraries that's not a
problem, but for dynamic loading it is a bit nasty. One idea is to build
libssp similiar to RTLD by directly linking the necessary parts of libc
in, you can use a linker script to hide the symbols.
For linking -lssp itself, you could try to exploit
"-fno-stack-protector" and use that to not link libssp into.
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