Re: [Xen-devel] Basic bare metal ARM domain interface

[Ivan Pavic <ivan.pavic2@xxxxxx>]

Hello Julien,

On Fri, Jun 03, 2016 at 11:23:33AM +0100, Julien Grall wrote:
> 
> 
> On 02/06/16 20:09, Ivan Pavic wrote:
> >Hello Julien,
> 
> Hello Ivan,
> 
> >On Thu, Jun 02, 2016 at 12:41:02PM +0100, Julien Grall wrote:
> >>
> >>Which compiler led to use a data abort? And where was the data
> >>abort? In Xen or the guest?
> >>
> >
> >When I compile app directly on ODROID I used:
> >arm-linux-gnueabihf
> >gcc version 4.8.4 (Ubuntu/Linaro 4.8.4-2ubuntu1~14.04.1)
> >
> >HVC instruction works form assembler, but when I call it from main, for
> >example:
> >HYPERVISOR_console_io (HYPERCALL_WRITE, SYSTEM_UP_LEN, SYSTEM_UP_MSG);
> >then I get this in xl dmesg:
> >traps.c:2450:d2v0 HSR=0x90000046 pc=0x40008250 gva=0 gpa=0000000000000000
> 
> To be honest this looks like a latent issue in your app rather than
> a bug in the compiler.
> 
> I would try to find which instruction is causing the data abort.
> Also is your app running with page table and cache enabled?
> 

Page table and cache are related to MMU, right? I didn't initialize MMU 
so far.

Regards,

Ivan Pavic



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