| /* Copyright (C) 2001, 2004 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by David Mosberger-Tang <davidm@hpl.hp.com>. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| #include <sysdep.h> |
| #include <features.h> |
| |
| /* When a context set up by __makecontext() is activated, control |
| transfers to __start_context. When we get here: |
| |
| b1 = entry point of function to call |
| in0 = address of UCP to resume after function returns |
| in1 = global pointer for __start_context |
| out0 .. outN = arguments for function */ |
| |
| ENTRY(__start_context) |
| .prologue |
| alloc r2 = ar.pfs, 2, 0, 8, 0 |
| |
| .save rp, r4 // terminate call chain with a NULL rp |
| mov r4 = r0 |
| ;; |
| |
| .body |
| br.call.sptk rp = b1 |
| 1: |
| mov gp = in1 // restore gp |
| cmp.ne p6,p0 = in0, r0 // uc_link != 0 ? |
| ;; |
| (p6) mov out0 = in0 |
| (p6) br.call.sptk rp = __setcontext |
| .Lexit: |
| mov out0 = 0 |
| br.call.sptk rp = HIDDEN_JUMPTARGET(exit) |
| |
| 1: br.cond.sptk .Lexit |
| END(__start_context) |
