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linux-user: Allow -R values up to 0xffff0000 for 32-bit ARM guests 

The 32-bit ARM validate_guest_space() check tests whether the
specified -R value leaves enough space for us to put the
commpage in at 0xffff0f00. However it was incorrectly doing
a <= check for the check against (guest_base + guest_size),
which meant that it wasn't permitting the guest space to
butt right up against the commpage.

Fix the comparison, so that -R values all the way up to 0xffff0000
work correctly.

Reviewed-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This commit is contained in:
Peter Maydell 2017-10-03 17:21:43 +01:00 committed by Riku Voipio
parent dd13df011d
commit e568f9df08
1 changed files with 1 additions and 1 deletions
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2
linux-user/elfload.c
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@ -377,7 +377,7 @@ static int validate_guest_space(unsigned long guest_base,
* then there is no way we can allocate it.
*/
if (test_page_addr >= guest_base
&& test_page_addr <= (guest_base + guest_size)) {
&& test_page_addr < (guest_base + guest_size)) {
return -1;
}