Hi Greg, Greg Ungerer wrote, > Hi Waldemar, > > On 23/04/16 08:50, Waldemar Brodkorb wrote: > >Hi Greg, > >Greg Ungerer wrote, > > > >>>How could I generate the information for you? Do you have > >>>a kernel patch I would need to apply? I can bootup a kernel > >>>and execute code, I just can't type anything into the serial > >> > >>Attached is a kernel patch that modifies binfmt_flat to print > >>out the reloc number along with the reloc error. That way we can > >>map that back to the reloc entry number printed out in the verbose > >>output from elf2flt at compile time. > > > >Thanks for the patch, will try it. > > > >>>I am not sure any Qemu Cortex-M3/4 system emulation is > >>>available. > >> > >>Do you know of any qemu target machines that work out-of-the-box > >>with a stock linux kernel with MMU disabled? > > > >No. > > > >>I used to use the gdb/ARMulator many years ago, but the kernel > >>target machine (Atmel/at91eb01) is long gone in modern kernel > >>version. > > > >I tried three different qemu forks, but they all only provide > >system level emulation for bare-metal apps. Skyeye crashes for me > >and recent GDB doesn't contain the old Armulator stuff. > > > >I tried Qemu mainline to bootup versatilepb/vexpress Linux kernel > >without MMU, but get no output. > > Looking into the other ARM flat problem, I figured we need to get > this problem solved as well. > > Turns out it is not too hard to get a Versatile target built > and running on qemu in no-MMU mode. The only real change required > is the attached patch - which fixes the IO device addressing problem. > > With this patch and starting with the versatile_defconfig you > only need a couple of config changes and it will run on the > versatile target in qemu. You need to disable CONFIG_MMU > and set the DRAM sizing (base at 0, size 128MB). > > This patch is against a linux-4.4 kernel, and it looks like the > versatile target has gone device tree from 4.5 and newer - so > this patch won't apply or work on them as is.
Can you show us the commandline you use? What -cpu do you use? Thanks Waldemar _______________________________________________ uClinux-dev mailing list uClinux-dev@uclinux.org http://mailman.uclinux.org/mailman/listinfo/uclinux-dev This message was resent by uclinux-dev@uclinux.org To unsubscribe see: http://mailman.uclinux.org/mailman/options/uclinux-dev
