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comparison dyncallback/dyncall_thunk_ppc32_sysv.c @ 0:3e629dc19168

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initial from svn dyncall-1745
author Daniel Adler
date Thu, 19 Mar 2015 22:24:28 +0100
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children d0787f3b81fb
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-1:000000000000 0:3e629dc19168
1 /*
2
3 Package: dyncall
4 Library: dyncallback
5 File: dyncallback/dyncall_thunk_ppc32_sysv.c
6 Description: Thunks on PowerPC 32-bit System V ABI
7 License:
8
9 Copyright (c) 2015 Daniel Adler <dadler@uni-goettingen.de>
10
11 Permission to use, copy, modify, and distribute this software for any
12 purpose with or without fee is hereby granted, provided that the above
13 copyright notice and this permission notice appear in all copies.
14
15 THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
16 WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
17 MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
18 ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
19 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
20 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
21 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
22
23 */
24
25
26 #include "dyncall_thunk.h"
27
28 unsigned short hi16(x) { return ( (unsigned short) (((unsigned int)x)>>16UL) ); }
29 unsigned short lo16(x) { return ( (unsigned short) ((unsigned int)x) ); }
30
31 void dcbInitThunk(DCThunk* p, void (*entry)())
32 {
33 /*
34 0: 3d 60 00 00 lis r11,0
35 4: 61 6b 00 01 ori r11,r11,1
36 8: 81 82 00 14 lwz r12,20(r2)
37 c: 7d 89 03 a6 mtctr r12
38 10: 4e 80 04 20 bctr
39 */
40 p->code_load_hi = 0x3d60U; /* lis r11, HI16(p) */
41 p->addr_self_hi = hi16(p);
42 p->code_load_lo = 0x616bU; /* ori r11, r11, LO16(p) */
43 p->addr_self_lo = lo16(p);
44 p->code_jump[0] = 0x818b0014U; /* lwz r12, 20(r11) */
45 p->code_jump[1] = 0x7d8903a6U; /* mtclr r12 */
46 p->code_jump[2] = 0x4e800420U; /* bctr */
47 p->addr_entry = entry;
48
49 }
50