Messages in this thread Patch in this message | | | Subject | [patch 1/1] x86_64: remove old decl (trivial) | From | blaisorblade@yahoo ... | Date | Fri, 04 Mar 2005 20:10:15 +0100 |
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CC: Andi Kleen <ak@suse.de>
vm_force_exec32 and friends were still alive on 2.6.9 release, but now (and in 2.6.10) they seem deleted. I've not compile-tested this, but it seems correct. Below some history of why I guess they were deleted (I'm including it so that you can find the changeset which deleted the definitions but forgot the declarations in).
They were used in 2.6.9 arch/x86_64/kernel/setup64.c and arch/x86_64/ia32/sys_ia32.c to implement the NX option:
arch/x86_64/ia32/sys_ia32.c-{ arch/x86_64/ia32/sys_ia32.c- if (prot & PROT_READ) arch/x86_64/ia32/sys_ia32.c: prot |= vm_force_exec32; arch/x86_64/ia32/sys_ia32.c- return sys_mprotect(start,len,prot); arch/x86_64/ia32/sys_ia32.c-}
The above sample code from 2.6.9 or'ed the mask with vm_force_exec32, which was PROT_EXEC (NX disabled) or 0 (NX enabled) depending on the user's choice at boot.
This was deleted because probably replaced by a check on current->personality in do_mmap_pgoff().
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> ---
linux-2.6.11-paolo/include/asm-x86_64/page.h | 4 ---- 1 files changed, 4 deletions(-)
diff -puN include/asm-x86_64/page.h~x86-64-remove-old-decl include/asm-x86_64/page.h --- linux-2.6.11/include/asm-x86_64/page.h~x86-64-remove-old-decl 2005-03-04 20:01:30.054785960 +0100 +++ linux-2.6.11-paolo/include/asm-x86_64/page.h 2005-03-04 20:02:27.189100224 +0100 @@ -63,10 +63,6 @@ typedef struct { unsigned long pgprot; } #define __pgd(x) ((pgd_t) { (x) } ) #define __pgprot(x) ((pgprot_t) { (x) } ) -extern unsigned long vm_stack_flags, vm_stack_flags32; -extern unsigned long vm_data_default_flags, vm_data_default_flags32; -extern unsigned long vm_force_exec32; - #define __START_KERNEL 0xffffffff80100000UL #define __START_KERNEL_map 0xffffffff80000000UL #define __PAGE_OFFSET 0xffff810000000000UL _ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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