Re: Bad code generated with -mabi=ms?
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David Given <dg@xxxxxxxxxxx> writes: > Ian Lance Taylor wrote: > [...] >> The workaround is to not use -mabi=ms when compiling in 32-bit mode. In >> 32-bit mode the sysv ABI and the ms ABI are almost identical. They are >> significantly different in 64-bit mode. > > We're using 32-bit, luckily, so this is feasible. The bug doesn't occur in 64-bit mode anyhow, only in 32-bit mode. Basically the bug is that the original code did not think anybody would use -mabi=ms in 32-bit mode. >> In 32-bit mode, I think the sysv and ms ABI are identical unless you use >> the -mrtd command line option. > > Can you point me at any definitive description of the differences > between the two ABIs? We're doing some reasonably exotic things and I'd > like to double check that everything will still work. I don't know of any such document, sorry. I can tell you where the sysv ABI is defined (http://refspecs.linuxbase.org/elf/abi386-4.pdf, http://refspecs.linuxbase.org/elf/x86_64-abi-0.95.pdf), but I don't know where the MS ABI is defined. Ian