| /* Save current context and install the given one. |
| 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 <sys/trap.h> |
| |
| #include "ucontext_i.h" |
| |
| |
| /* int __swapcontext (ucontext_t *oucp, const ucontext_t *ucp); |
| |
| Saves the machine context in oucp such that when it is activated, |
| it appears as if __swapcontext() returned again, restores the |
| machine context in ucp and thereby resumes execution in that |
| context. |
| |
| 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(__swapcontext) |
| save %sp, -112, %sp |
| ta ST_FLUSH_WINDOWS |
| st %g0, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_PSR] |
| 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] |
| 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] |
| 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] |
| |
| mov SIG_SETMASK, %o0 |
| add %i1, UC_SIGMASK, %o1 |
| add %i0, UC_SIGMASK, %o2 |
| mov 8, %o3 |
| mov __NR_rt_sigprocmask, %g1 |
| ta 0x10 |
| |
| mov %i1, %i0 |
| ldub [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_EN], %g1 |
| cmp %g1, 0 |
| be 1f |
| nop |
| ld [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_FSR], %fsr |
| ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D0], %f0 |
| ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D2], %f2 |
| ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D4], %f4 |
| ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D6], %f6 |
| ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D8], %f8 |
| ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D10], %f10 |
| ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D12], %f12 |
| ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D14], %f14 |
| ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D16], %f16 |
| ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D18], %f18 |
| ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D20], %f20 |
| ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D22], %f22 |
| ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D24], %f24 |
| ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D26], %f26 |
| ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D28], %f28 |
| ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D30], %f30 |
| 1: |
| ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_Y], %g1 |
| wr %g1, 0x0, %y |
| ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G2], %g2 |
| ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G3], %g3 |
| ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G4], %g4 |
| ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G5], %g5 |
| ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G6], %g6 |
| ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G7], %g7 |
| ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O1], %i1 |
| ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O2], %i2 |
| ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O3], %i3 |
| ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O4], %i4 |
| ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O5], %i5 |
| ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O6], %i6 |
| restore |
| ld [%o0 + UC_MCONTEXT + MC_GREGS + GREG_O7], %o7 |
| ld [%o0 + UC_MCONTEXT + MC_GREGS + GREG_PC], %g1 |
| jmpl %g1, %g0 |
| ld [%o0 + UC_MCONTEXT + MC_GREGS + GREG_O0], %o0 |
| END(__swapcontext) |
| |
| weak_alias (__swapcontext, swapcontext) |
