[PING][PATCH 0/3] AArch64 SVE: Support for changing vector length

[Alan Hayward]

Ping.

AArch64 only changes, so if there are no comments by the end of the week,
I’ll push on Monday.


Self review: Spelling mistake “differemt” in the ChangeLog for patch 2. :)


Alan.


> On 22 Mar 2019, at 16:27, Alan Hayward <Alan.Hayward@arm.com> wrote:
> 
> On an AArch64 SVE system it is possible to change the vector length of the
> current thread (not process!) using prctl.  Currently GDB will ignore any
> such changes on a process being debugged.
> 
> This patch series supports these changes by using an override of
> thread_architecture ().  An example is given in patch 2.
> 
> Note that this does not yet work when debugging a process attached via
> gdbserver. Here GDB will continue to ignore the change.  Getting this
> working is a more larger change which I'm still looking into.
> 
> Tested on a system emulator running Linux.
> 
> Once real world hardware SVE running Linux is available I'd like to add
> some tests for this.  until there is not much point as running the
> testsuite on a fully emulated system is fairly painful.
> 
> 
> Alan Hayward (3):
>  AArch64: Tidy up aarch64_gdbarch_init
>  AArch64 SVE: Check for vector length change when getting gdbarch
>  AArch64 SVE: Support changing vector lengths for ptrace
> 
> gdb/aarch64-linux-nat.c            | 36 ++++++++++++
> gdb/aarch64-tdep.c                 | 92 +++++++++++++++---------------
> gdb/nat/aarch64-sve-linux-ptrace.c | 92 ++++++++++++++++--------------
> gdb/nat/aarch64-sve-linux-ptrace.h | 12 +++-
> 4 files changed, 140 insertions(+), 92 deletions(-)
> 
> -- 
> 2.17.2 (Apple Git-113)
>