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sandbox: Unprotect DATA regions in bus tests

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On my Ubuntu 18.04.1 machine two driver-model bus tests have started
failing recently. The problem appears to be that the DATA region of the
executable is protected. This does not seem correct, but perhaps there
is a reason.

To work around it, unprotect the regions in these tests before accessing
them.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2018-10-01 21:12:32 -06:00
parent 0a60a81ba3
commit 9f8037ea9c
3 changed files with 35 additions and 0 deletions
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11
arch/sandbox/cpu/os.c
View file

@ -636,3 +636,14 @@ void os_abort(void)
{
abort();
}
int os_mprotect_allow(void *start, size_t len)
{
int page_size = getpagesize();
/* Move start to the start of a page, len to the end */
start = (void *)(((ulong)start) & ~(page_size - 1));
len = (len + page_size * 2) & ~(page_size - 1);
return mprotect(start, len, PROT_READ | PROT_WRITE);
}