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X-Received-From: 2607:f8b0:400d:c0d::232 Subject: [Qemu-devel] [PATCH v2 1/4] linux-user: Allow -R values up to 0xffff0000 for 32-bit ARM guests X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, riku.voipio@iki.fi Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDKM_2 RSF_6 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Peter Maydell 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 <=3D 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 Signed-off-by: Peter Maydell Message-Id: <1507047703-10774-1-git-send-email-peter.maydell@linaro.org> Signed-off-by: Richard Henderson --- linux-user/elfload.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/linux-user/elfload.c b/linux-user/elfload.c index 79062882ba..3b857fbc9c 100644 --- a/linux-user/elfload.c +++ b/linux-user/elfload.c @@ -377,7 +377,7 @@ static int validate_guest_space(unsigned long guest_bas= e, * then there is no way we can allocate it. */ if (test_page_addr >=3D guest_base - && test_page_addr <=3D (guest_base + guest_size)) { + && test_page_addr < (guest_base + guest_size)) { return -1; } =20 --=20 2.13.6