2008-05-05 09:34:18 +00:00
|
|
|
/* Save current context.
|
2015-01-02 16:28:19 +00:00
|
|
|
Copyright (C) 2008-2015 Free Software Foundation, Inc.
|
2008-05-05 09:34:18 +00:00
|
|
|
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
|
2012-02-09 23:18:22 +00:00
|
|
|
License along with the GNU C Library; if not, see
|
|
|
|
|
<http://www.gnu.org/licenses/>. */
|
2008-05-05 09:34:18 +00:00
|
|
|
|
|
|
|
|
#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)
|
