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This is for consistency with other structures, and ultimately with
Linux coding style. The typedef ("Process") was dropped as well for
this reason.
This opportunity was used to fix coding style around the impacted
lines.
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The issue this is trying to solve is that some backends (Itanium in
particular) change the parameter passing convention depending on whether
given parameter is part of varargs parameter or not. Therefore the
backend needs to know a) that any give argument is part of parameter pack,
and b) if it is, whether it's a varargs-type pack, or something else.
Backends that wish to use this should add #define ARCH_HAVE_FETCH_PACK and
define functions arch_fetch_param_pack_{start,end} (with the same interface
as fetch_param_pack_{start,end} from fetch.h).
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arch.h is supposed to be a simple configuration file and few have inclusion
guards. sysdep.h is the proper interface to use.
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For consistency with value_extract_word
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- this is now a thin wrapper over gimme_arg, ideally the backends will
eventually use this right interface
- in display_args.c, strip one layer of pointer wrapping, which is now
done in output.c
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