3a45975681
This prevents cross-region mappings on IA64 and SPARC which could lead to system crash. They were correctly trapped for normal mmap() calls, but not for the kernel internal calls generated by executable loading. This code just moves the architecture-specific cross-region checks into an arch-specific "arch_mmap_check()" macro, and defines that for the architectures that needed it (ia64, sparc and sparc64). Architectures that don't have any special requirements can just ignore the new cross-region check, since the mmap() code will just notice on its own when the macro isn't defined. Signed-off-by: Pavel Emelianov <xemul@openvz.org> Signed-off-by: Kirill Korotaev <dev@openvz.org> Acked-by: David Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> [ Cleaned up to not affect architectures that don't need it ] Signed-off-by: Linus Torvalds <torvalds@osdl.org>
47 lines
1.7 KiB
C
47 lines
1.7 KiB
C
/* $Id: mman.h,v 1.2 2000/03/15 02:44:26 davem Exp $ */
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#ifndef __SPARC64_MMAN_H__
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#define __SPARC64_MMAN_H__
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#include <asm-generic/mman.h>
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/* SunOS'ified... */
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#define MAP_RENAME MAP_ANONYMOUS /* In SunOS terminology */
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#define MAP_NORESERVE 0x40 /* don't reserve swap pages */
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#define MAP_INHERIT 0x80 /* SunOS doesn't do this, but... */
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#define MAP_LOCKED 0x100 /* lock the mapping */
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#define _MAP_NEW 0x80000000 /* Binary compatibility is fun... */
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#define MAP_GROWSDOWN 0x0200 /* stack-like segment */
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#define MAP_DENYWRITE 0x0800 /* ETXTBSY */
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#define MAP_EXECUTABLE 0x1000 /* mark it as an executable */
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#define MCL_CURRENT 0x2000 /* lock all currently mapped pages */
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#define MCL_FUTURE 0x4000 /* lock all additions to address space */
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#define MAP_POPULATE 0x8000 /* populate (prefault) pagetables */
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#define MAP_NONBLOCK 0x10000 /* do not block on IO */
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/* XXX Need to add flags to SunOS's mctl, mlockall, and madvise system
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* XXX calls.
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*/
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/* SunOS sys_mctl() stuff... */
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#define MC_SYNC 1 /* Sync pages in memory with storage (usu. a file) */
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#define MC_LOCK 2 /* Lock pages into core ram, do not allow swapping of them */
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#define MC_UNLOCK 3 /* Unlock pages locked via previous mctl() with MC_LOCK arg */
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#define MC_LOCKAS 5 /* Lock an entire address space of the calling process */
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#define MC_UNLOCKAS 6 /* Unlock entire address space of calling process */
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#define MADV_FREE 0x5 /* (Solaris) contents can be freed */
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#ifdef __KERNEL__
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#ifndef __ASSEMBLY__
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#define arch_mmap_check sparc64_mmap_check
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int sparc64_mmap_check(unsigned long addr, unsigned long len,
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unsigned long flags);
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#endif
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#endif
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#endif /* __SPARC64_MMAN_H__ */
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