Quoting Thomas Huth (2023-04-04 12:14:34) > Clang complains: > > s390x/snippets/c/cstart.S:22:13: error: invalid operand for instruction > lghi %r15, stackptr > ^ > Let's load the address with "larl" instead, like we already do > it in s390x/cstart64.S. For this we should also switch to 64-bit > mode first, then we also don't have to clear r15 right in front > of this anymore. > > Changing the code here triggered another problem: initial_cr0 > must be aligned on a double-word boundary, otherwise the lctlg > instruction will fail with an specification exception. This was > just working by accident so far - add an ".align 8" now to avoid > the problem. > > Signed-off-by: Thomas Huth <thuth@xxxxxxxxxx> Reviewed-by: Nico Boehr <nrb@xxxxxxxxxxxxx>
