Messages in this thread | | | Date | Thu, 10 Apr 2008 14:33:10 +0200 | From | Cedric Le Goater <> | Subject | Re: [PATCH 0/3] clone64() and unshare64() system calls |
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H. Peter Anvin wrote: > sukadev@us.ibm.com wrote: >>> >>> If you're going to make it a 64-bit pass it in as a 64-bit number, >>> instead of breaking it into two numbers. >> >> Maybe I am missing your point. The glibc interface could take a 64bit >> parameter, but don't we need to pass 32-bit values into the system >> call on 32 bit systems ? > > Not as such, no. The ABI handles that. To make the ABI clean on some > architectures, it's good to consider a 64-bit value only in positions > where they map to an even:odd register pair once slotted in.
OK. I didn't know that. I took sys_llseek() as an example of an interface to follow when coded clone64().
Thanks,
C.
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