1 /* Save current context and install the given one.
2 Copyright (C) 2008 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by David S. Miller <davem@davemloft.net>, 2008.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
24 #include "ucontext_i.h"
27 /* int __swapcontext (ucontext_t *oucp, const ucontext_t *ucp);
29 Saves the machine context in oucp such that when it is activated,
30 it appears as if __swapcontext() returned again, restores the
31 machine context in ucp and thereby resumes execution in that
34 This implementation is intended to be used for *synchronous* context
35 switches only. Therefore, it does not have to save anything
36 other than the PRESERVED state. */
41 st %g0, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_PSR]
43 st %o0, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_PC]
45 st %o0, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_NPC]
47 st %o1, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_Y]
48 st %g1, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G1]
49 st %g2, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G2]
50 st %g3, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G3]
51 st %g4, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G4]
52 st %g5, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G5]
53 st %g6, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G6]
54 st %g7, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G7]
55 st %g0, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O0]
56 st %i1, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O1]
57 st %i2, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O2]
58 st %i3, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O3]
59 st %i4, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O4]
60 st %i5, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O5]
61 st %i6, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O6]
62 st %i7, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O7]
63 st %g0, [%i0 + UC_MCONTEXT + MC_GWINS]
64 stb %g0, [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_EN]
65 st %g0, [%i0 + UC_MCONTEXT + MC_XRS + XRS_ID]
66 st %g0, [%i0 + UC_MCONTEXT + MC_XRS + XRS_PTR]
69 add %i1, UC_SIGMASK, %o1
70 add %i0, UC_SIGMASK, %o2
72 mov __NR_rt_sigprocmask, %g1
76 ldub [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_EN], %g1
80 ld [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_FSR], %fsr
81 ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D0], %f0
82 ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D2], %f2
83 ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D4], %f4
84 ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D6], %f6
85 ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D8], %f8
86 ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D10], %f10
87 ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D12], %f12
88 ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D14], %f14
89 ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D16], %f16
90 ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D18], %f18
91 ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D20], %f20
92 ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D22], %f22
93 ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D24], %f24
94 ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D26], %f26
95 ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D28], %f28
96 ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D30], %f30
98 ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_Y], %g1
100 ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G2], %g2
101 ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G3], %g3
102 ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G4], %g4
103 ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G5], %g5
104 ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G6], %g6
105 ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G7], %g7
106 ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O1], %i1
107 ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O2], %i2
108 ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O3], %i3
109 ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O4], %i4
110 ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O5], %i5
111 ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O6], %i6
113 ld [%o0 + UC_MCONTEXT + MC_GREGS + GREG_O7], %o7
114 ld [%o0 + UC_MCONTEXT + MC_GREGS + GREG_PC], %g1
116 ld [%o0 + UC_MCONTEXT + MC_GREGS + GREG_O0], %o0
119 weak_alias (__swapcontext, swapcontext)