On Fri, Oct 16, 2015 at 11:09 AM, Peter Maydell <peter.mayd...@linaro.org> wrote:
> You might find it helpful to turn on QEMU's debug logging > (see the -d and -D options). Chances are that some insn > in your new code is faulting (probably UNDEFing). I think have figured it out, looks like my code was doing two bad things: 1. Trying to save registers to a nonexistent stack ($sp == 0 when stmia is called) 2. Clobbering r4 that is used globally throughout head.S Removing the stmia/ldmia, and using r7 instead of r4 appears to have resolved the issue. It is a mystery how this code has been working on actual hardware, and why reverting SHA 6ec1588e097 somehow made QEMU work. Any clues why? Thanks for all the help! Ilya
