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x86_64-xlate.pl commentary section update.

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Andy Polyakov 2005-11-06 11:59:39 +00:00
parent f530138876
commit d256b95768
1 changed files with 4 additions and 1 deletions
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crypto/perlasm/x86_64-xlate.pl
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@ -486,7 +486,10 @@ close STDOUT;
# arguments passed to callee, *but* not less than 4! This means that
# upon function entry point 5th argument resides at 40(%rsp), as well
# as that 32 bytes from 8(%rsp) can always be used as temporal
# storage [without allocating a frame].
# storage [without allocating a frame]. One can actually argue that
# one can assume a "red zone" above stack pointer under Win64 as well.
# Point is that at apparently no accasion Windows would alter the area
# above stack pointer in true asynchronous manner...
#
# All the above means that if assembler programmer adheres to Unix
# register and stack layout, but disregards the "red zone" existense,