On Thu, Jun 30, 2016 at 01:58:08PM +0000, Hallsmark, Per wrote:

Catalin Marinas wrote:

quoted

On Wed, Feb 24, 2016 at 03:54:59PM +0100, per.hallsmark at windriver.com wrote:

quoted

From: Per Hallsmark <redacted>

Today arm64 have it's own variant when a userspace app is doing a
non-implemented syscall in that it dumps on console process name,
registers and such. This makes a different behaviour on arm64 than
on all other archs.

Are you hitting a real issue with this? Test apps doing random syscalls?

The issue was found on a real case, running lttng that tries to make use
of sys_brk before falling back to internal variant. On arm64 this generates
an "ugly" dump on console which dont happen on arm, x86 etc.

Why would a sys_brk() end up on the do_ni_syscall() path?

-- 
Catalin