/* Save current context and install the given one. Copyright (C) 2008-2016 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, see <http://www.gnu.org/licenses/>. */ #include <sysdep.h> #include "ucontext_i.h" #define ST_FLUSH_WINDOWS 3 /* 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)