ref: b68b2cd425a4ab62b6fb62d5906d2f1de5a8f1a6 dir: /sys/src/cmd/unix/drawterm/posix-sun4u/getcallerpc.c/
#include "u.h" #include "libc.h" ulong getcallerpc(void *a) { return ((ulong*)a)[-1]; }