On Thu, Aug 13, 2009 at 04:31:17PM -0700, Brian McGrew wrote: > Good afternoon y¹all! I¹ve asked this question once before, so forgive me, > but I never got a conclusive answer and now it¹s time that I have to make > something happen :-) > > We've ported our applications from Fedora Core 5 32 bit to CentOS 5.3 x86_64 > and so far our own code is working great. > > Now we need to link to a set of third party libraries that are 32 bit and > since the vendor is in the middle of bankruptcy they're not going to port > the code for us and getting the source code is even more of a stretch. > > Is there anything I can do? Some kind of a wrapper or conversion program or > something??? These are dynamic libraries I'm linking to using the standard > gcc-4.1.2 that comes with the machine. If I need to upgrade gcc or other > libraries on the box, I can do that too. 32-bit and 64-bit x86_64 have different ABI's. Arguments are passed in different registers, and the stack is setup differently. The 32-bit library would not be able to access any external, such as system calls or variables. In addition, some 32-bit instructions are not valid when the program is in 64-bit mode (there are altivernative encodings for the instructions that work in 64-bit, but the one generated by 32-bit compilers would not work). -- Michael Meissner, IBM 4 Technology Place Drive, MS 2203A, Westford, MA, 01886, USA meissner@xxxxxxxxxxxxxxxxxx
