-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Andrew Haley wrote: > Sebastian Biallas writes: > > Andrew Haley wrote: > > > Sebastian Biallas writes: > > > > Hello everyone, > > > > > > > > I'm working on a x86_64 project which has mixed C and assembly code. The > > > > program should (ultimatively) run on all major x86_64 platforms but > > > > currently I'm facing the problem that x86_64 has a completely different > > > > ABI on e.g. Linux and Windows. This makes interfacing between C and > > > > assembler impossible in a portable manner. > > > > > > > > So I either need to provide the assembly files in different flavours or > > > > (which is why I ask here) gcc provides some __attribute__((elf_abi)) or > > > > __attribute__((linux_abi)) or something like that. > > > > > > > > Is the already such an attribute or is it planned? Or this there another > > > > solution for the problem? > > > > > > Make life easy for yourself: Write different assembly code. > > > > Well, actually it would be much easier for me if gcc could handle > > this :) > > Mostly it can. That's what inline asm is for. Well, I haven't told the whole story. Actually it's some sort of JIT which generated tons of machine code, which also wants to interface with C code. > > > Keeping 2500 lines of assembly code in sync is not really easy. > > I would have thought it'd be easier to fix that by not using so much > assembler code, I know. But in this case it's really necessary to have this support code in assembler (because I have to rely on certain things). > but I don't know your application area. > > > > The ABI is different, and to work fully with gcc, assembly code > > > really needs DWARF2 unwinder data, and that makes no sense at all > > > to Windows. > > > > Huh? I thought unwind data is only needed for C++-Exceptions, isn't it? > > We use it everywhere, even for C code. You can probably get away > without it. Some pointer for further reading? Sebastian -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iQEVAwUBRTO/gf81M8QtvOSJAQLc5QgApcODxRfzekV87HJISi3MTuOfww644ojO rPXt96NRk5LjyKVGgu+KIxEZwAzGhYFOe1l75DQaFykaSMyq2WQgT8ElSxtEd4eJ 0kCuuFbz89WvAK+xFKLkirEEnssnDFV1hr4AxE3QPrF0JJRZhrQNQE5OIznmTYdo GTBmZcTOjjnyzLMzmiYdp9CPVukaGkEXm6rpUoxbBr+OOwiIpQADmhEisrsx3XSC cPT0uNJVA3uprvtOlvIVYv/4xe+6lUzjSPXiN+y5fjdwHifKE9Y1OHUbhaNYuyi+ BieKuA6wagGAW7kHd8TIanXeD0Tbd1pMoUAhXpm1e5vAuleCigBPcw== =Wcqa -----END PGP SIGNATURE-----
