From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jerry Van Baren Date: Mon, 19 Mar 2007 09:47:46 -0400 Subject: [U-Boot-Users] u-boot 1.1.4 compiled by eldk 4.1 for mpc82xx crashed In-Reply-To: <45FE7BD7.2000506@centecnetworks.com> References: <45FE7BD7.2000506@centecnetworks.com> Message-ID: <45FE9482.8030008@smiths-aerospace.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Miao Qingjun wrote: > Hi, > > I encountered a big problem that u-boot 1.1.4 compiled by eldk 4.1 for > mpc82xx crashed. > > But if I build it using gcc-3.4.6 based cross tools, u-boot on my board > boots correctly. > > u-boot built by eldk 4.1 (gcc-4.0) failed, nothing occures on serial > port. > > Somebody sufered the same problem? This is often a missing "volatile" qualifier on shared variable (particularly hardware registers) references. Newer compiler versions optimize more aggressively, making missing "volatile"s visible. If you use -O0 (no optimization) does it fix the problem? If it does, it most likely is an optimization/volatile issue. The hard part is to figure out where. Device handling and board-specific code is the place to start. Best regards, gvb