|
0
|
1 /*
|
|
|
2
|
|
|
3 Package: dyncall
|
|
|
4 Library: dyncallback
|
|
|
5 File: dyncallback/dyncall_thunk_sparc64.c
|
|
|
6 Description: Thunk - Implementation for sparc64
|
|
|
7 License:
|
|
|
8
|
|
190
|
9 Copyright (c) 2007-2017 Daniel Adler <dadler@uni-goettingen.de>,
|
|
0
|
10 Tassilo Philipp <tphilipp@potion-studios.com>
|
|
|
11
|
|
|
12 Permission to use, copy, modify, and distribute this software for any
|
|
|
13 purpose with or without fee is hereby granted, provided that the above
|
|
|
14 copyright notice and this permission notice appear in all copies.
|
|
|
15
|
|
|
16 THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
|
17 WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
|
18 MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
|
19 ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
|
20 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
|
21 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
|
22 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
|
23
|
|
|
24 */
|
|
|
25
|
|
|
26
|
|
|
27 #include "dyncall_thunk.h"
|
|
|
28
|
|
|
29 void dcbInitThunk(DCThunk* p, void (*entry)())
|
|
|
30 {
|
|
189
|
31 /* example
|
|
|
32 ; put thunk pointer in g1
|
|
|
33 0: 03 00 00 00 sethi %hi(0), %g1
|
|
|
34 4: 82 10 60 00 or %g1, 0, %g1
|
|
|
35 8: 83 28 70 20 sllx %g1, 0x20, %g1
|
|
|
36 12: 21 00 00 00 sethi %hi(0), %l0
|
|
|
37 16: a0 14 20 00 or %l0, 0, %l0
|
|
|
38 20: 82 04 00 01 add %l0, %g1, %g1
|
|
|
39 ; use g2 for entry pointer and "call" it, b/c branch instructions can't handle 64bit addresses
|
|
|
40 24: 05 00 00 00 sethi %hi(0), %g2
|
|
|
41 28: 84 10 a0 00 or %g2, 0, %g2
|
|
|
42 32: 85 28 b0 20 sllx %g2, 0x20, %g2
|
|
|
43 36: 21 00 00 00 sethi %hi(0), %l0
|
|
|
44 40: a0 14 20 00 or %l0, 0, %l0
|
|
|
45 44: 84 04 00 02 add %l0, %g2, %g2
|
|
|
46 ; jump - write link to %g0, effectively discarding it; also nop for delay slot
|
|
|
47 48: 81 c0 80 00 jmpl %g2, %g0
|
|
|
48 52: 01 00 00 00 nop
|
|
|
49 */
|
|
|
50
|
|
|
51 union {
|
|
|
52 unsigned int x[2];
|
|
|
53 void* p;
|
|
|
54 } t, e;
|
|
|
55 t.p = p;
|
|
|
56 e.p = entry;
|
|
|
57
|
|
|
58 p->code[ 0] = 0x03000000 | (t.x[0] >> 10); /* sethi %hi(p), %g1 -- hi 22 bits */
|
|
|
59 p->code[ 1] = 0x82106000 | (t.x[0] & 0x3ff); /* or %g1, <p&0x3ff>, %g1 -- lo 10 bits */
|
|
|
60 p->code[ 2] = 0x83287020; /* sllx %g1, 0x20, %g1 */
|
|
|
61 p->code[ 3] = 0x21000000 | (t.x[1] >> 10); /* sethi %hi(p), %l0 */
|
|
|
62 p->code[ 4] = 0xa0142000 | (t.x[1] & 0x3ff); /* or %l0, <p&0x3ff>, %l0 */
|
|
|
63 p->code[ 5] = 0x82040001; /* add %l0, %g1, %g1 */
|
|
|
64 p->code[ 6] = 0x05000000 | (e.x[0] >> 10); /* sethi %hi(entry), %g2 */
|
|
|
65 p->code[ 7] = 0x8410a000 | (e.x[0] & 0x3ff); /* or %g2, <entry&0x3ff>, %g2 */
|
|
|
66 p->code[ 8] = 0x8528b020; /* sllx %g2, 0x20, %g2 */
|
|
|
67 p->code[ 9] = 0x21000000 | (e.x[1] >> 10); /* sethi %hi(entry), %l0 */
|
|
|
68 p->code[10] = 0xa0142000 | (e.x[1] & 0x3ff); /* or %l0, <entry&0x3ff>, %l0 */
|
|
|
69 p->code[11] = 0x84040002; /* add %l0, %g2, %g2 */
|
|
|
70 p->code[12] = 0x81c08000; /* jmpl %g2, %g0 -- discards link addr */
|
|
|
71 p->code[13] = 0x01000000; /* nop */
|
|
0
|
72 }
|
|
|
73
|
