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