Mercurial > pub > dyncall > dyncall
view dyncallback/dyncall_thunk_sparc64.c @ 194:41d6945f5858
- sparc doc improvements (esp. for sparc64)
author | Tassilo Philipp |
---|---|
date | Sat, 18 Mar 2017 19:08:45 +0100 |
parents | 06ee88ce4962 |
children | f5577f6bf97a |
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/* Package: dyncall Library: dyncallback File: dyncallback/dyncall_thunk_sparc64.c Description: Thunk - Implementation for sparc64 License: Copyright (c) 2007-2017 Daniel Adler <dadler@uni-goettingen.de>, Tassilo Philipp <tphilipp@potion-studios.com> Permission to use, copy, modify, and distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include "dyncall_thunk.h" void dcbInitThunk(DCThunk* p, void (*entry)()) { /* example ; put thunk pointer in g1 0: 03 00 00 00 sethi %hi(0), %g1 4: 82 10 60 00 or %g1, 0, %g1 8: 83 28 70 20 sllx %g1, 0x20, %g1 12: 21 00 00 00 sethi %hi(0), %l0 16: a0 14 20 00 or %l0, 0, %l0 20: 82 04 00 01 add %l0, %g1, %g1 ; use g2 for entry pointer and "call" it, b/c branch instructions can't handle 64bit addresses 24: 05 00 00 00 sethi %hi(0), %g2 28: 84 10 a0 00 or %g2, 0, %g2 32: 85 28 b0 20 sllx %g2, 0x20, %g2 36: 21 00 00 00 sethi %hi(0), %l0 40: a0 14 20 00 or %l0, 0, %l0 44: 84 04 00 02 add %l0, %g2, %g2 ; jump - write link to %g0, effectively discarding it; also nop for delay slot 48: 81 c0 80 00 jmpl %g2, %g0 52: 01 00 00 00 nop */ union { unsigned int x[2]; void* p; } t, e; t.p = p; e.p = entry; p->code[ 0] = 0x03000000 | (t.x[0] >> 10); /* sethi %hi(p), %g1 -- hi 22 bits */ p->code[ 1] = 0x82106000 | (t.x[0] & 0x3ff); /* or %g1, <p&0x3ff>, %g1 -- lo 10 bits */ p->code[ 2] = 0x83287020; /* sllx %g1, 0x20, %g1 */ p->code[ 3] = 0x21000000 | (t.x[1] >> 10); /* sethi %hi(p), %l0 */ p->code[ 4] = 0xa0142000 | (t.x[1] & 0x3ff); /* or %l0, <p&0x3ff>, %l0 */ p->code[ 5] = 0x82040001; /* add %l0, %g1, %g1 */ p->code[ 6] = 0x05000000 | (e.x[0] >> 10); /* sethi %hi(entry), %g2 */ p->code[ 7] = 0x8410a000 | (e.x[0] & 0x3ff); /* or %g2, <entry&0x3ff>, %g2 */ p->code[ 8] = 0x8528b020; /* sllx %g2, 0x20, %g2 */ p->code[ 9] = 0x21000000 | (e.x[1] >> 10); /* sethi %hi(entry), %l0 */ p->code[10] = 0xa0142000 | (e.x[1] & 0x3ff); /* or %l0, <entry&0x3ff>, %l0 */ p->code[11] = 0x84040002; /* add %l0, %g2, %g2 */ p->code[12] = 0x81c08000; /* jmpl %g2, %g0 -- discards link addr */ p->code[13] = 0x01000000; /* nop */ }