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[PATCH] kprobes/ia64: refuse inserting kprobe on slot 1

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Without the ability to atomically write 16 bytes, we can not update the
middle slot of a bundle, slot 1, unless we stop the machine first.  This
patch will ensure the ability to robustly insert and remove a kprobe by
refusing to insert a kprobe on slot 1 until a mechanism is in place to
safely handle this case.

Signed-off-by: Rusty Lynch <rusty.lynch@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Rusty Lynch 2005-06-27 15:17:15 -07:00 committed by Linus Torvalds
parent 97f7943d70
commit a528e21c23
1 changed files with 7 additions and 0 deletions
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7
arch/ia64/kernel/kprobes.c
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@ -270,6 +270,13 @@ static int valid_kprobe_addr(int template, int slot, unsigned long addr)
addr);
return -EINVAL;
}
if (slot == 1 && bundle_encoding[template][1] != L) {
printk(KERN_WARNING "Inserting kprobes on slot #1 "
"is not supported\n");
return -EINVAL;
}
return 0;
}