Messages in this thread | | | Date | Fri, 21 Oct 2005 16:37:22 +0100 | From | Alex Bligh - linux-kernel <> | Subject | Re: Understanding Linux addr space, malloc, and heap |
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--On 21 October 2005 17:22 +0200 Arjan van de Ven <arjan@infradead.org> wrote:
> Ok I meant in the "while adhering to the standard" :)
More precisely, as per the man page: > POSIX.1b says that mprotect can be used only on regions of memory > obtained from mmap(2).
But what is interesting (if anything) is this: > ERRORS > EINVAL addr is not a valid pointer, or not a multiple of > PAGESIZE.
So if he calls mprotect with memory allocated by malloc (which should fail), why doesn't he get EINVAL? He says it returns 0 (meaning it succeeded). Which it shouldn't (unless he is stupendously lucky in malloc's allocation, in which case it should work).
-- Alex Bligh - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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