Re: [crash] Re: Latest brk patchset

[H. Peter Anvin]

Jeremy Fitzhardinge wrote:
> H. Peter Anvin wrote:
> > Or simplified:
> >
> > PAGE_TABLE_SIZE(((1 << 32)-PAGE_OFFSET) >> PAGE_SHIFT) << PAGE_SHIFT
>
> Was worried about 1<<32 overflowing.  Never really sure what gas's type 
> system is.

It's bignum-based.

You could also write:

PAGE_TABLE_SIZE((-PAGE_OFFSET & 0xffffffff) >> PAGE_SHIFT) << PAGE_SHIFT

(the & 0xffffffff is necessary, or you'll get a signed shift.)

	-hpa
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