__builtin_frame_address
const struct frameinfo *frame = __builtin_frame_address(0);
fp = (uint64_t *)__builtin_frame_address(0);
rbp = (uint64_t *)__builtin_frame_address(0);
rbp = (uint64_t *)__builtin_frame_address(0);
rbp = (uint64_t *)__builtin_frame_address(0);
fp = (uint32_t *)__builtin_frame_address(0);
frompcindex = ((int *)__builtin_frame_address(1))[1]; \
__builtin_frame_address(0), prfunc)
struct icallsframe *icf = (void *) __builtin_frame_address(0);
(db_expr_t)(intptr_t)__builtin_frame_address(0), true, \
(db_expr_t)(intptr_t)__builtin_frame_address(0),
void *fp = __builtin_frame_address(0);
return __builtin_frame_address(0);