It's enabled by adding -s to mcreboot.sh.
Cherry-pick of the following commit:
commit b5c13ce51a5a4926c2cf11c817cd0d369ac4402d
Author: Katsuya Horigome <katsuya.horigome.rj@ps.hitachi-solutions.com>
Date: Mon Nov 20 09:40:41 2017 +0900
Include measures to prevent memory destruction on Linux side (This is rebase commit for merging to development+hfi)
Heavily inspired off linux kernel's dynamic debug:
* add a /sys/kernel/debug/dynamic_debug/control file
(accessible from linux side in /sys/class/mcos/mcos0/sys/kernel/debug/dynamic_debug/control)
* read from file to list debug statements (currently limited to 4k in size)
* write to file with '[file foo ][func bar ][line [x][-[y]]] [+-]p' to change values
Side effects:
* reindented all linker scripts, there is a new __verbose section
* added string function strpbrk
Change-Id: I36d7707274dcc3ecaf200075a31a2f0f76021059
Some are important, e.g. the seemingly harmless braces around if with dprintf,
since that dprintf is defined as empty, will screw things up and grab the next
line
Change-Id: Ie5e1cf813178ad708ff42ae5e477fbc96034471c
init_normal_area was mapping identity lookups (phys = virt) from 0,
leading to many undetected null pointer dereferences in init_pt (but
not in new process page tables leading to odd behaviour)
This also makes the code use the set_pt_large_page() function, cleaning
it up a bit
Change-Id: I22889031de26a7e48501b0eb4d453ca62e671835
