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

[Julien Grall <julien.grall@xxxxxxx>]

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?
Regards,

--
Julien Grall

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