On 06/20/2011 03:51 PM, H.J. Lu wrote:
Promote pointers to Pmode when passing/returning in registers is
a security concern.
Whuh?
* combine.c (cant_combine_insn_p): Check zero/sign extended
hard registers.
This part is OK.
Bernd
On Mon, Jun 20, 2011 at 6:53 AM, Bernd Schmidt ber...@codesourcery.com wrote:
On 06/20/2011 03:51 PM, H.J. Lu wrote:
Promote pointers to Pmode when passing/returning in registers is
a security concern.
Whuh?
Peter, do you think it is safe to assume upper 32bits are zero in
user space for
On 06/20/2011 07:01 AM, H.J. Lu wrote:
On Mon, Jun 20, 2011 at 6:53 AM, Bernd Schmidt ber...@codesourcery.com
wrote:
On 06/20/2011 03:51 PM, H.J. Lu wrote:
Promote pointers to Pmode when passing/returning in registers is
a security concern.
No. Promoting *NON*-pointers (or rather,
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On 06/20/11 08:33, H. Peter Anvin wrote:
On 06/20/2011 07:01 AM, H.J. Lu wrote:
On Mon, Jun 20, 2011 at 6:53 AM, Bernd Schmidt ber...@codesourcery.com
wrote:
On 06/20/2011 03:51 PM, H.J. Lu wrote:
Promote pointers to Pmode when passing/returning
On Mon, Jun 20, 2011 at 7:33 AM, H. Peter Anvin h...@zytor.com wrote:
On 06/20/2011 07:01 AM, H.J. Lu wrote:
On Mon, Jun 20, 2011 at 6:53 AM, Bernd Schmidt ber...@codesourcery.com
wrote:
On 06/20/2011 03:51 PM, H.J. Lu wrote:
Promote pointers to Pmode when passing/returning in registers is
On Mon, Jun 20, 2011 at 7:40 AM, Jeff Law l...@redhat.com wrote:
Peter, do you think it is safe to assume upper 32bits are zero in
user space for x32? Kernel isn't a problem since pointer is 64bit
in kernel and we don't pass pointers on stack to kernel.
As I have already stated, if we
On 06/20/2011 07:43 AM, H.J. Lu wrote:
On Mon, Jun 20, 2011 at 7:33 AM, H. Peter Anvin h...@zytor.com wrote:
On 06/20/2011 07:01 AM, H.J. Lu wrote:
On Mon, Jun 20, 2011 at 6:53 AM, Bernd Schmidt ber...@codesourcery.com
wrote:
On 06/20/2011 03:51 PM, H.J. Lu wrote:
Promote pointers to Pmode
On 06/20/2011 03:49 PM, Richard Henderson wrote:
As I have already stated, if we *cannot* require pointers to be
zero-extended on entry to the kernel, we're going to have to have
special entry points for all the x32 system calls except the ones that
don't take pointers.
If it's a security
