2 # Copyright (C) 2005 Jakub Jermar
5 # Redistribution and use in source and binary forms, with or without
6 # modification, are permitted provided that the following conditions
9 # - Redistributions of source code must retain the above copyright
10 # notice, this list of conditions and the following disclaimer.
11 # - Redistributions in binary form must reproduce the above copyright
12 # notice, this list of conditions and the following disclaimer in the
13 # documentation and/or other materials provided with the distribution.
14 # - The name of the author may not be used to endorse or promote products
15 # derived from this software without specific prior written permission.
17 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 #include <libarch/context_offset.h>
34 .global context_restore
36 .macro CONTEXT_STORE r
37 stx %sp, [\r + OFFSET_SP]
38 stx %o7, [\r + OFFSET_PC]
39 stx %i0, [\r + OFFSET_I0]
40 stx %i1, [\r + OFFSET_I1]
41 stx %i2, [\r + OFFSET_I2]
42 stx %i3, [\r + OFFSET_I3]
43 stx %i4, [\r + OFFSET_I4]
44 stx %i5, [\r + OFFSET_I5]
45 stx %fp, [\r + OFFSET_FP]
46 stx %i7, [\r + OFFSET_I7]
47 stx %l0, [\r + OFFSET_L0]
48 stx %l1, [\r + OFFSET_L1]
49 stx %l2, [\r + OFFSET_L2]
50 stx %l3, [\r + OFFSET_L3]
51 stx %l4, [\r + OFFSET_L4]
52 stx %l5, [\r + OFFSET_L5]
53 stx %l6, [\r + OFFSET_L6]
54 stx %l7, [\r + OFFSET_L7]
55 stx %g7, [\r + OFFSET_TP]
59 ldx [\r + OFFSET_SP], %sp
60 ldx [\r + OFFSET_PC], %o7
61 ldx [\r + OFFSET_I0], %i0
62 ldx [\r + OFFSET_I1], %i1
63 ldx [\r + OFFSET_I2], %i2
64 ldx [\r + OFFSET_I3], %i3
65 ldx [\r + OFFSET_I4], %i4
66 ldx [\r + OFFSET_I5], %i5
67 ldx [\r + OFFSET_FP], %fp
68 ldx [\r + OFFSET_I7], %i7
69 ldx [\r + OFFSET_L0], %l0
70 ldx [\r + OFFSET_L1], %l1
71 ldx [\r + OFFSET_L2], %l2
72 ldx [\r + OFFSET_L3], %l3
73 ldx [\r + OFFSET_L4], %l4
74 ldx [\r + OFFSET_L5], %l5
75 ldx [\r + OFFSET_L6], %l6
76 ldx [\r + OFFSET_L7], %l7
77 ldx [\r + OFFSET_TP], %g7
83 mov 1, %o0 ! context_save_arch returns 1
87 # Flush all active windows.
88 # This is essential, because CONTEXT_LOAD overwrites
89 # %sp of CWP - 1 with the value written to %fp of CWP.
90 # Flushing all active windows mitigates this problem
91 # as CWP - 1 becomes the overlap window.
97 xor %o0, %o0, %o0 ! context_restore_arch returns 0