diff options
Diffstat (limited to 'REORG.TODO/sysdeps/unix/sysv/linux/sparc/sparc32/getcontext.S')
| -rw-r--r-- | REORG.TODO/sysdeps/unix/sysv/linux/sparc/sparc32/getcontext.S | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/unix/sysv/linux/sparc/sparc32/getcontext.S b/REORG.TODO/sysdeps/unix/sysv/linux/sparc/sparc32/getcontext.S new file mode 100644 index 0000000000..893d7bf5b5 --- /dev/null +++ b/REORG.TODO/sysdeps/unix/sysv/linux/sparc/sparc32/getcontext.S @@ -0,0 +1,84 @@ +/* Save current context. + Copyright (C) 2008-2017 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" + +/* 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) |