From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1L6yEu-0004ET-2A for qemu-devel@nongnu.org; Sun, 30 Nov 2008 21:10:20 -0500 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1L6yEs-0004Co-RK for qemu-devel@nongnu.org; Sun, 30 Nov 2008 21:10:19 -0500 Received: from [199.232.76.173] (port=50816 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1L6yEs-0004CV-Kd for qemu-devel@nongnu.org; Sun, 30 Nov 2008 21:10:18 -0500 Received: from savannah.gnu.org ([199.232.41.3]:37006 helo=sv.gnu.org) by monty-python.gnu.org with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1L6yEs-00057v-B4 for qemu-devel@nongnu.org; Sun, 30 Nov 2008 21:10:18 -0500 Received: from cvs.savannah.gnu.org ([199.232.41.69]) by sv.gnu.org with esmtp (Exim 4.63) (envelope-from ) id 1L6yEr-00087f-WA for qemu-devel@nongnu.org; Mon, 01 Dec 2008 02:10:18 +0000 Received: from balrog by cvs.savannah.gnu.org with local (Exim 4.63) (envelope-from ) id 1L6yEr-00087b-PP for qemu-devel@nongnu.org; Mon, 01 Dec 2008 02:10:17 +0000 MIME-Version: 1.0 Errors-To: balrog Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Andrzej Zaborowski Message-Id: Date: Mon, 01 Dec 2008 02:10:17 +0000 Subject: [Qemu-devel] [5844] arm: Reserve code buffer in memory range reachable for pc-relative branch. Reply-To: qemu-devel@nongnu.org List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Revision: 5844 http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=5844 Author: balrog Date: 2008-12-01 02:10:17 +0000 (Mon, 01 Dec 2008) Log Message: ----------- arm: Reserve code buffer in memory range reachable for pc-relative branch. Unfortunately this range is so narrow that I'm not sure if it makes more sense to always use memory load to pc kind of branch instead. Modified Paths: -------------- trunk/exec.c Modified: trunk/exec.c =================================================================== --- trunk/exec.c 2008-12-01 02:02:37 UTC (rev 5843) +++ trunk/exec.c 2008-12-01 02:10:17 UTC (rev 5844) @@ -436,6 +436,12 @@ start = (void *) 0x60000000UL; if (code_gen_buffer_size > (512 * 1024 * 1024)) code_gen_buffer_size = (512 * 1024 * 1024); +#elif defined(__arm__) + /* Map the buffer below 64M, so we can use direct calls and branches */ + flags |= MAP_FIXED; + start = (void *) 0x01000000UL; + if (code_gen_buffer_size > 16 * 1024 * 1024) + code_gen_buffer_size = 16 * 1024 * 1024; #endif code_gen_buffer = mmap(start, code_gen_buffer_size, PROT_WRITE | PROT_READ | PROT_EXEC,