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1 | # |
1 | # |
2 | # Copyright (c) 2005 Jakub Jermar |
2 | # Copyright (c) 2005 Jakub Jermar |
3 | # All rights reserved. |
3 | # All rights reserved. |
4 | # |
4 | # |
5 | # Redistribution and use in source and binary forms, with or without |
5 | # Redistribution and use in source and binary forms, with or without |
6 | # modification, are permitted provided that the following conditions |
6 | # modification, are permitted provided that the following conditions |
7 | # are met: |
7 | # are met: |
8 | # |
8 | # |
9 | # - Redistributions of source code must retain the above copyright |
9 | # - Redistributions of source code must retain the above copyright |
10 | # notice, this list of conditions and the following disclaimer. |
10 | # notice, this list of conditions and the following disclaimer. |
11 | # - Redistributions in binary form must reproduce the above copyright |
11 | # - Redistributions in binary form must reproduce the above copyright |
12 | # notice, this list of conditions and the following disclaimer in the |
12 | # notice, this list of conditions and the following disclaimer in the |
13 | # documentation and/or other materials provided with the distribution. |
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 |
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. |
15 | # derived from this software without specific prior written permission. |
16 | # |
16 | # |
17 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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 |
18 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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 |
23 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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 |
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. |
26 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | # |
27 | # |
28 | 28 | ||
29 | #include <libarch/context_offset.h> |
29 | #include <libarch/context_offset.h> |
30 | 30 | ||
31 | .text |
31 | .text |
32 | 32 | ||
33 | .global context_save |
33 | .global context_save |
34 | .global context_restore |
34 | .global context_restore |
35 | 35 | ||
36 | .macro CONTEXT_STORE r |
36 | .macro CONTEXT_STORE r |
37 | stx %sp, [\r + OFFSET_SP] |
37 | stx %sp, [\r + OFFSET_SP] |
38 | stx %o7, [\r + OFFSET_PC] |
38 | stx %o7, [\r + OFFSET_PC] |
39 | stx %i0, [\r + OFFSET_I0] |
39 | stx %i0, [\r + OFFSET_I0] |
40 | stx %i1, [\r + OFFSET_I1] |
40 | stx %i1, [\r + OFFSET_I1] |
41 | stx %i2, [\r + OFFSET_I2] |
41 | stx %i2, [\r + OFFSET_I2] |
42 | stx %i3, [\r + OFFSET_I3] |
42 | stx %i3, [\r + OFFSET_I3] |
43 | stx %i4, [\r + OFFSET_I4] |
43 | stx %i4, [\r + OFFSET_I4] |
44 | stx %i5, [\r + OFFSET_I5] |
44 | stx %i5, [\r + OFFSET_I5] |
45 | stx %fp, [\r + OFFSET_FP] |
45 | stx %fp, [\r + OFFSET_FP] |
46 | stx %i7, [\r + OFFSET_I7] |
46 | stx %i7, [\r + OFFSET_I7] |
47 | stx %l0, [\r + OFFSET_L0] |
47 | stx %l0, [\r + OFFSET_L0] |
48 | stx %l1, [\r + OFFSET_L1] |
48 | stx %l1, [\r + OFFSET_L1] |
49 | stx %l2, [\r + OFFSET_L2] |
49 | stx %l2, [\r + OFFSET_L2] |
50 | stx %l3, [\r + OFFSET_L3] |
50 | stx %l3, [\r + OFFSET_L3] |
51 | stx %l4, [\r + OFFSET_L4] |
51 | stx %l4, [\r + OFFSET_L4] |
52 | stx %l5, [\r + OFFSET_L5] |
52 | stx %l5, [\r + OFFSET_L5] |
53 | stx %l6, [\r + OFFSET_L6] |
53 | stx %l6, [\r + OFFSET_L6] |
54 | stx %l7, [\r + OFFSET_L7] |
54 | stx %l7, [\r + OFFSET_L7] |
55 | stx %g7, [\r + OFFSET_TP] |
55 | stx %g7, [\r + OFFSET_TP] |
56 | .endm |
56 | .endm |
57 | 57 | ||
58 | .macro CONTEXT_LOAD r |
58 | .macro CONTEXT_LOAD r |
59 | ldx [\r + OFFSET_SP], %sp |
59 | ldx [\r + OFFSET_SP], %sp |
60 | ldx [\r + OFFSET_PC], %o7 |
60 | ldx [\r + OFFSET_PC], %o7 |
61 | ldx [\r + OFFSET_I0], %i0 |
61 | ldx [\r + OFFSET_I0], %i0 |
62 | ldx [\r + OFFSET_I1], %i1 |
62 | ldx [\r + OFFSET_I1], %i1 |
63 | ldx [\r + OFFSET_I2], %i2 |
63 | ldx [\r + OFFSET_I2], %i2 |
64 | ldx [\r + OFFSET_I3], %i3 |
64 | ldx [\r + OFFSET_I3], %i3 |
65 | ldx [\r + OFFSET_I4], %i4 |
65 | ldx [\r + OFFSET_I4], %i4 |
66 | ldx [\r + OFFSET_I5], %i5 |
66 | ldx [\r + OFFSET_I5], %i5 |
67 | ldx [\r + OFFSET_FP], %fp |
67 | ldx [\r + OFFSET_FP], %fp |
68 | ldx [\r + OFFSET_I7], %i7 |
68 | ldx [\r + OFFSET_I7], %i7 |
69 | ldx [\r + OFFSET_L0], %l0 |
69 | ldx [\r + OFFSET_L0], %l0 |
70 | ldx [\r + OFFSET_L1], %l1 |
70 | ldx [\r + OFFSET_L1], %l1 |
71 | ldx [\r + OFFSET_L2], %l2 |
71 | ldx [\r + OFFSET_L2], %l2 |
72 | ldx [\r + OFFSET_L3], %l3 |
72 | ldx [\r + OFFSET_L3], %l3 |
73 | ldx [\r + OFFSET_L4], %l4 |
73 | ldx [\r + OFFSET_L4], %l4 |
74 | ldx [\r + OFFSET_L5], %l5 |
74 | ldx [\r + OFFSET_L5], %l5 |
75 | ldx [\r + OFFSET_L6], %l6 |
75 | ldx [\r + OFFSET_L6], %l6 |
76 | ldx [\r + OFFSET_L7], %l7 |
76 | ldx [\r + OFFSET_L7], %l7 |
77 | ldx [\r + OFFSET_TP], %g7 |
77 | ldx [\r + OFFSET_TP], %g7 |
78 | .endm |
78 | .endm |
79 | 79 | ||
80 | context_save: |
80 | context_save: |
81 | CONTEXT_STORE %o0 |
81 | CONTEXT_STORE %o0 |
82 | retl |
82 | retl |
83 | mov 1, %o0 ! context_save_arch returns 1 |
83 | mov 1, %o0 ! context_save_arch returns 1 |
84 | 84 | ||
85 | context_restore: |
85 | context_restore: |
86 | # |
86 | # |
87 | # Flush all active windows. |
87 | # Flush all active windows. |
88 | # This is essential, because CONTEXT_LOAD overwrites |
88 | # This is essential, because CONTEXT_LOAD overwrites |
89 | # %sp of CWP - 1 with the value written to %fp of CWP. |
89 | # %sp of CWP - 1 with the value written to %fp of CWP. |
90 | # Flushing all active windows mitigates this problem |
90 | # Flushing all active windows mitigates this problem |
91 | # as CWP - 1 becomes the overlap window. |
91 | # as CWP - 1 becomes the overlap window. |
92 | # |
92 | # |
93 | flushw |
93 | flushw |
94 | 94 | ||
95 | CONTEXT_LOAD %o0 |
95 | CONTEXT_LOAD %o0 |
96 | retl |
96 | retl |
97 | xor %o0, %o0, %o0 ! context_restore_arch returns 0 |
97 | xor %o0, %o0, %o0 ! context_restore_arch returns 0 |
98 | 98 |