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| author | Helge Deller <deller@parisc-linux.org> | 2006-01-13 13:21:06 -0700 |
|---|---|---|
| committer | Kyle McMartin <kyle@duet.int.mcmartin.ca> | 2006-01-22 20:26:54 -0500 |
| commit | 1bcdd8548286743e1d6b3d53c96a90c6da975620 (patch) | |
| tree | b244aa416992bbd06c4153ec2c97022629826ef2 /include/asm-parisc | |
| parent | a2bb214dcd1db862fdb6421e21f1cff0c3535162 (diff) | |
| download | lwn-1bcdd8548286743e1d6b3d53c96a90c6da975620.tar.gz lwn-1bcdd8548286743e1d6b3d53c96a90c6da975620.zip | |
[PARISC] Add CONFIG_DEBUG_RODATA to protect read-only data
Add the parisc version of the "mark rodata section read only" patches.
Based on code from and Signed-off-by Arjan van de Ven
<arjan@infradead.org>, Ingo Molnar <mingo@elte.hu>, Andi Kleen <ak@muc.de>,
Andrew Morton <akpm@osdl.org>, Linus Torvalds <torvalds@osdl.org>.
Signed-off-by: Helge Deller <deller@parisc-linux.org>
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
Diffstat (limited to 'include/asm-parisc')
| -rw-r--r-- | include/asm-parisc/cacheflush.h | 6 | ||||
| -rw-r--r-- | include/asm-parisc/pgtable.h | 2 |
2 files changed, 7 insertions, 1 deletions
diff --git a/include/asm-parisc/cacheflush.h b/include/asm-parisc/cacheflush.h index 1bc3c83ee74b..c53af9ff41b5 100644 --- a/include/asm-parisc/cacheflush.h +++ b/include/asm-parisc/cacheflush.h @@ -183,4 +183,10 @@ flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long __flush_cache_page(vma, vmaddr); } + +#ifdef CONFIG_DEBUG_RODATA +void mark_rodata_ro(void); #endif + +#endif /* _PARISC_CACHEFLUSH_H */ + diff --git a/include/asm-parisc/pgtable.h b/include/asm-parisc/pgtable.h index b4554711c3e7..4e34c6b44059 100644 --- a/include/asm-parisc/pgtable.h +++ b/include/asm-parisc/pgtable.h @@ -213,7 +213,7 @@ extern void *vmalloc_start; #define PAGE_COPY PAGE_EXECREAD #define PAGE_RWX __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_READ | _PAGE_WRITE | _PAGE_EXEC |_PAGE_ACCESSED) #define PAGE_KERNEL __pgprot(_PAGE_KERNEL) -#define PAGE_KERNEL_RO __pgprot(_PAGE_PRESENT | _PAGE_EXEC | _PAGE_READ | _PAGE_DIRTY | _PAGE_ACCESSED) +#define PAGE_KERNEL_RO __pgprot(_PAGE_KERNEL & ~_PAGE_WRITE) #define PAGE_KERNEL_UNC __pgprot(_PAGE_KERNEL | _PAGE_NO_CACHE) #define PAGE_GATEWAY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_GATEWAY| _PAGE_READ) #define PAGE_FLUSH __pgprot(_PAGE_FLUSH) |