CC: Andi Kleen <[EMAIL PROTECTED]>
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 <[EMAIL PROTECTED]>
---
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
_
-
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