It turns out that ARMCC generates a call to malloc when you use a VLA. Was a bit...

rkangel on March 17, 2016 | parent | context | favorite | on: C – Preliminary C2x Charter

It turns out that ARMCC generates a call to malloc when you use a VLA. Was a bit of a suprrise when I used one in an ISR explicitly to AVOID malloc.

Apparently the lack of a frame pointer on ARM means that tracking dynamically sized stack frames is a problem.