Messages in this thread |  | | | Date | Wed, 14 Apr 2004 18:44:20 +1000 | | From | Anton Blanchard <> | | Subject | Re: PowerPC exec page protection |
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Hi,
> <asm-ppc/pgtable.h> and <asm-ppc64/pgtable.h> both define the > following map of protection bits: > > #define __P000 PAGE_NONE > #define __P001 PAGE_READONLY_X > #define __P010 PAGE_COPY > #define __P011 PAGE_COPY_X > #define __P100 PAGE_READONLY > #define __P101 PAGE_READONLY_X > #define __P110 PAGE_COPY > #define __P111 PAGE_COPY_X > > #define __S000 PAGE_NONE > #define __S001 PAGE_READONLY_X > #define __S010 PAGE_SHARED > #define __S011 PAGE_SHARED_X > #define __S100 PAGE_READONLY > #define __S101 PAGE_READONLY_X > #define __S110 PAGE_SHARED > #define __S111 PAGE_SHARED_X > > The _X flags seem wrongly placed, as bit 2 is the PROT_EXEC bit, not > bit 0. Is the above intentional?
Its backwards and we know it :) Ive got a patch to implement per page execute on ppc64 and that did pop up.
Thanks for pointing it out, are you looking at ppc* page protection or just chanced upon it?
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