Messages in this thread | | | Date | Fri, 30 Jan 2004 22:08:12 -0800 | From | "H. Peter Anvin" <> | Subject | Re: long long on 32-bit machines |
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Paul Mackerras wrote: > H. Peter Anvin writes: > > >>Does anyone happen to know if there are *any* 32-bit architectures (on >>which Linux runs) for which the ABI for a "long long" is different from >>passing two "longs" in the appropriate order, i.e. (hi,lo) for bigendian >>or (lo,hi) for littleendian? > > > Are you are talking about passing arguments to a function? PPC32 > passes long long arguments in two registers in the order you would > expect (hi, lo), BUT you have to use an odd/even register pair. In > other words, if you have a function like this: > > int foo(int a, long long b) > > then a will be passed in r3 and b will be passed in r5 and r6, and r4 > will be unused. >
Does system calls follow the same convention?
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