Simon 'corecode' Schubert wrote:
caddr_t is a pointer to a kernel address. I'm not sure about current 64 bit implementations, but at least for ia32/linux/bsd sizeof(caddr_t) == sizeof(unsigned long). If this is the same on 64 bit architectures, a change would be no problem. It's just: SUS/IEEE/ISO/POSIX doesn't guarrantee the equation above.
It's about the same for size_t. size_t is a guarranteed unsigned integer to pass (memory) sizes in. for ia32/linux/bsd again, sizeof(size_t) == sizeof(unsigned [long] int).
So, what happens in x86-64 where sizeof(unsigned long) is 4 bytes for IA-32 apps and 8 bytes for x86-64 apps? I guess since it's a parameter to the ioctl (rather than embedded in a structure) it should be okay, but I just want to be sure...
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