ref: f0ea8a3f6019b4fe7d37f33b0a5a3a88fd1fcdc7 dir: /sys/src/cmd/unix/drawterm/posix-sun4u/getcallerpc.c/
#include "u.h" #include "libc.h" ulong getcallerpc(void *a) { return ((ulong*)a)[-1]; }