| 0,0 → 1,63 |
|---|
| # |
| # Copyright (c) 2005 Jakub Jermar |
| # All rights reserved. |
| # |
| # Redistribution and use in source and binary forms, with or without |
| # modification, are permitted provided that the following conditions |
| # are met: |
| # |
| # - Redistributions of source code must retain the above copyright |
| # notice, this list of conditions and the following disclaimer. |
| # - Redistributions in binary form must reproduce the above copyright |
| # notice, this list of conditions and the following disclaimer in the |
| # documentation and/or other materials provided with the distribution. |
| # - The name of the author may not be used to endorse or promote products |
| # derived from this software without specific prior written permission. |
| # |
| # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| # |
| |
| #include <arch/context_offset.h> |
| |
| /** |
| * Both context_save_arch() and context_restore_arch() are |
| * leaf-optimized procedures. This kind of optimization |
| * is very important and prevents any implicit window |
| * spill/fill/clean traps in these very core kernel |
| * functions. |
| */ |
| |
| #include <arch/context_offset.h> |
| |
| .text |
| |
| .global context_save_arch |
| .global context_restore_arch |
| |
| context_save_arch: |
| CONTEXT_SAVE_ARCH_CORE %o0 |
| retl |
| mov 1, %o0 ! context_save_arch returns 1 |
| |
| context_restore_arch: |
| # |
| # Flush all active windows. |
| # This is essential, because CONTEXT_LOAD overwrites |
| # %sp of CWP - 1 with the value written to %fp of CWP. |
| # Flushing all active windows mitigates this problem |
| # as CWP - 1 becomes the overlap window. |
| # |
| flushw |
| |
| CONTEXT_RESTORE_ARCH_CORE %o0 |
| retl |
| xor %o0, %o0, %o0 ! context_restore_arch returns 0 |