[S390] Make vmalloc area start at address > 4GB.
Prevent that modules get loaded at addresses below 4GB to prevent exchanging system call table entries. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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@ -107,11 +107,18 @@ extern char empty_zero_page[PAGE_SIZE];
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* any out-of-bounds memory accesses will hopefully be caught.
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* any out-of-bounds memory accesses will hopefully be caught.
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* The vmalloc() routines leaves a hole of 4kB between each vmalloced
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* The vmalloc() routines leaves a hole of 4kB between each vmalloced
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* area for the same reason. ;)
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* area for the same reason. ;)
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* vmalloc area starts at 4GB to prevent syscall table entry exchanging
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* from modules.
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*/
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*/
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extern unsigned long vmalloc_end;
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extern unsigned long vmalloc_end;
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#define VMALLOC_OFFSET (8*1024*1024)
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#define VMALLOC_START (((unsigned long) high_memory + VMALLOC_OFFSET) \
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#ifdef CONFIG_64BIT
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& ~(VMALLOC_OFFSET-1))
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#define VMALLOC_ADDR (max(0x100000000UL, (unsigned long) high_memory))
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#else
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#define VMALLOC_ADDR ((unsigned long) high_memory)
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#endif
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#define VMALLOC_OFFSET (8*1024*1024)
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#define VMALLOC_START ((VMALLOC_ADDR + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))
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#define VMALLOC_END vmalloc_end
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#define VMALLOC_END vmalloc_end
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/*
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/*
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