| /* Save current context. |
| Copyright (C) 2008 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by David S. Miller <davem@davemloft.net>, 2008. |
| |
| 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 "ucontext_i.h" |
| |
| /* int __getcontext (ucontext_t *ucp) |
| |
| Saves the machine context in UCP such that when it is activated, |
| it appears as if __getcontext() returned again. |
| |
| This implementation is intended to be used for *synchronous* context |
| switches only. Therefore, it does not have to save anything |
| other than the PRESERVED state. */ |
| |
| |
| ENTRY(__getcontext) |
| save %sp, -112, %sp |
| st %g0, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_PSR] |
| |
| /* In reality, we only use the GREG_PC value when setting |
| or swapping contexts. But we fill in NPC for completeness. */ |
| add %i7, 8, %o0 |
| st %o0, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_PC] |
| add %o0, 4, %o0 |
| st %o0, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_NPC] |
| |
| rd %y, %o1 |
| st %o1, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_Y] |
| |
| st %g1, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G1] |
| st %g2, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G2] |
| st %g3, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G3] |
| st %g4, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G4] |
| st %g5, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G5] |
| st %g6, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G6] |
| st %g7, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G7] |
| |
| mov SIG_BLOCK, %o0 |
| clr %o1 |
| add %i0, UC_SIGMASK, %o2 |
| mov 8, %o3 |
| mov __NR_rt_sigprocmask, %g1 |
| ta 0x10 |
| |
| /* Zero, success, return value. */ |
| st %g0, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O0] |
| st %i1, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O1] |
| st %i2, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O2] |
| st %i3, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O3] |
| st %i4, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O4] |
| st %i5, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O5] |
| st %i6, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O6] |
| st %i7, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O7] |
| |
| st %g0, [%i0 + UC_MCONTEXT + MC_GWINS] |
| |
| /* Do not save FPU state, it is volatile across calls. */ |
| stb %g0, [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_EN] |
| |
| st %g0, [%i0 + UC_MCONTEXT + MC_XRS + XRS_ID] |
| st %g0, [%i0 + UC_MCONTEXT + MC_XRS + XRS_PTR] |
| jmpl %i7 + 8, %g0 |
| restore %g0, %g0, %o0 |
| END(__getcontext) |
| |
| weak_alias (__getcontext, getcontext) |