diff options
| author | Andi Kleen <ak@suse.de> | 2008-01-30 13:33:42 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:33:42 +0100 |
| commit | 4c3c4b4513a361cc6ac5ee8677695260c4f0f25f (patch) | |
| tree | 3a56ada5131a85fff2bb37841d822d098b92f68c | |
| parent | e66a95127dc4273d3573eb03657991f7bbd5dca3 (diff) | |
| download | op-kernel-dev-4c3c4b4513a361cc6ac5ee8677695260c4f0f25f.zip op-kernel-dev-4c3c4b4513a361cc6ac5ee8677695260c4f0f25f.tar.gz | |
x86: clean up pte_exec
- Rename it to pte_exec() from pte_exec_kernel(). There is nothing
kernel specific in there.
- Move it into the common file because _PAGE_NX is 0 on !PAE and then
pte_exec() will be always evaluate to true.
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| -rw-r--r-- | arch/x86/mm/fault_32.c | 2 | ||||
| -rw-r--r-- | arch/x86/mm/init_32.c | 2 | ||||
| -rw-r--r-- | include/asm-x86/pgtable-2level.h | 8 | ||||
| -rw-r--r-- | include/asm-x86/pgtable-3level.h | 8 | ||||
| -rw-r--r-- | include/asm-x86/pgtable.h | 1 |
5 files changed, 3 insertions, 18 deletions
diff --git a/arch/x86/mm/fault_32.c b/arch/x86/mm/fault_32.c index 41c3196..f7972ae 100644 --- a/arch/x86/mm/fault_32.c +++ b/arch/x86/mm/fault_32.c @@ -615,7 +615,7 @@ no_context: if (error_code & PF_INSTR) { pte_t *pte = lookup_address(address); - if (pte && pte_present(*pte) && !pte_exec_kernel(*pte)) + if (pte && pte_present(*pte) && !pte_exec(*pte)) printk(KERN_CRIT "kernel tried to execute " "NX-protected page - exploit attempt? " "(uid: %d)\n", current->uid); diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c index 724a5ef..5080646 100644 --- a/arch/x86/mm/init_32.c +++ b/arch/x86/mm/init_32.c @@ -542,7 +542,7 @@ int __init set_kernel_exec(unsigned long vaddr, int enable) pte = lookup_address(vaddr); BUG_ON(!pte); - if (!pte_exec_kernel(*pte)) + if (!pte_exec(*pte)) ret = 0; if (enable) diff --git a/include/asm-x86/pgtable-2level.h b/include/asm-x86/pgtable-2level.h index ce486bd..701404f 100644 --- a/include/asm-x86/pgtable-2level.h +++ b/include/asm-x86/pgtable-2level.h @@ -56,14 +56,6 @@ static inline pte_t native_ptep_get_and_clear(pte_t *xp) #define pte_pfn(x) (pte_val(x) >> PAGE_SHIFT) /* - * All present pages are kernel-executable: - */ -static inline int pte_exec_kernel(pte_t pte) -{ - return 1; -} - -/* * Bits 0, 6 and 7 are taken, split up the 29 bits of offset * into this range: */ diff --git a/include/asm-x86/pgtable-3level.h b/include/asm-x86/pgtable-3level.h index 62bb065..62a1ffb 100644 --- a/include/asm-x86/pgtable-3level.h +++ b/include/asm-x86/pgtable-3level.h @@ -19,14 +19,6 @@ #define pud_bad(pud) 0 #define pud_present(pud) 1 -/* - * All present pages with !NX bit are kernel-executable: - */ -static inline int pte_exec_kernel(pte_t pte) -{ - return !(pte_val(pte) & _PAGE_NX); -} - /* Rules for using set_pte: the pte being assigned *must* be * either not present or in a state where the hardware will * not attempt to update the pte. In places where this is diff --git a/include/asm-x86/pgtable.h b/include/asm-x86/pgtable.h index 75a656e..2f3d908 100644 --- a/include/asm-x86/pgtable.h +++ b/include/asm-x86/pgtable.h @@ -139,6 +139,7 @@ static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_RW; } static inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE; } static inline int pte_huge(pte_t pte) { return pte_val(pte) & _PAGE_PSE; } +static inline int pte_exec(pte_t pte) { return !(pte_val(pte) & _PAGE_NX); } static inline int pmd_large(pmd_t pte) { return (pmd_val(pte) & (_PAGE_PSE|_PAGE_PRESENT)) == |
