On 03/20/2014 04:27 AM, Neil Horman wrote:
>>
> So, I answered my own question, sort of. The __i386__ is clear: x86_64 uses
> RIP
> relative addressing, making the saving of ebx not needed - thats perfectly
> clear.
>
> Whats a bit less clear to me is why it matters. Ideally moving ebx and
> re
On Thu, Mar 20, 2014 at 07:03:23AM -0400, Neil Horman wrote:
> On Wed, Mar 19, 2014 at 09:22:03PM -0700, H. Peter Anvin wrote:
> > On 03/19/2014 05:40 PM, Neil Horman wrote:
> > > So after some discussion with hpa, I need to self NAK this again,
> > > apologies for
> > > the noise. Theres some cl
On Wed, Mar 19, 2014 at 09:22:03PM -0700, H. Peter Anvin wrote:
> On 03/19/2014 05:40 PM, Neil Horman wrote:
> > So after some discussion with hpa, I need to self NAK this again, apologies
> > for
> > the noise. Theres some clean up to be done in this area, and I'm still
> > getting
> > a segfau
On 03/19/2014 05:40 PM, Neil Horman wrote:
> So after some discussion with hpa, I need to self NAK this again, apologies
> for
> the noise. Theres some clean up to be done in this area, and I'm still
> getting
> a segfault that is in some way related to this code, but I need to dig deeper
> to
On Wed, Mar 19, 2014 at 08:44:46AM -0700, H. Peter Anvin wrote:
> On 03/19/2014 07:48 AM, Neil Horman wrote:
> > The recent conversion to build dpdk as a DSO has an error in
> > rte_cpu_get_features. When being build with -fpie, %ebx gets clobbered by
> > the
> > cpuid instruction which is also t
The recent conversion to build dpdk as a DSO has an error in
rte_cpu_get_features. When being build with -fpie, %ebx gets clobbered by the
cpuid instruction which is also the pic register. Therefore the inline asm
tries to save off %ebx, but does so incorrectly. It starts by loading
params.ebx t
On 03/19/2014 07:48 AM, Neil Horman wrote:
> The recent conversion to build dpdk as a DSO has an error in
> rte_cpu_get_features. When being build with -fpie, %ebx gets clobbered by the
> cpuid instruction which is also the pic register. Therefore the inline asm
> tries to save off %ebx, but does
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