On Mon, 1 Sep 2014, Richard Henderson wrote:
> On 09/01/2014 08:09 AM, Mikulas Patocka wrote: > > So, what exactly should be done? Can we hack ld so that if filename is > > "libots.so", lazy binding for symbols in this library is turned off > > automatically? > > Not hack ld.so. > > Modify the libots.so binary such that _OtsZero is STT_NOTYPE. The linker will > not create a plt entry unless the symbol is STT_FUNC. > > I see that most of the _Ots symbols are already NOTYPE. I wonder if this is > intentional and _OtsZero just got forgotten, or if it's a happy oversight in > that they forgot to annotate them entirely. > > r~ It is legally questionable if we can redistribute the modified library. Even if I could distribute it, where would I upload it so that other people will find it? Obviously I can't upload it to ftp.compaq.com where the compiler is located. So, I think a better solution would be to change ld so that it would recognize "libots.so" filename and act as if symbols in this file were defined with STT_NOTYPE attribute. Or, turn off that "secure plt" feature at all if "libots.so" is used - Alpha is so rare that I doubt anybody will put any effort into writing exploits for Alpha. Mikulas _______________________________________________ bug-binutils mailing list bug-binutils@gnu.org https://lists.gnu.org/mailman/listinfo/bug-binutils
