Mercurial > pub > dyncall > dyncall
diff dyncallback/dyncall_thunk_sparc32.c @ 155:bbefb8b8e74c
- sparc32 thunk code
- replaced some c++ comments with old c ones
- whitespace cosmetics
| author | cslag |
|---|---|
| date | Thu, 24 Nov 2016 23:47:31 +0000 |
| parents | 3e629dc19168 |
| children | b827c074b4da |
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--- a/dyncallback/dyncall_thunk_sparc32.c Thu Nov 10 20:37:21 2016 +0100 +++ b/dyncallback/dyncall_thunk_sparc32.c Thu Nov 24 23:47:31 2016 +0000 @@ -6,7 +6,7 @@ Description: Thunk - Implementation for sparc32 License: - Copyright (c) 2007-2015 Daniel Adler <dadler@uni-goettingen.de>, + Copyright (c) 2007-2016 Daniel Adler <dadler@uni-goettingen.de>, Tassilo Philipp <tphilipp@potion-studios.com> Permission to use, copy, modify, and distribute this software for any @@ -28,6 +28,23 @@ void dcbInitThunk(DCThunk* p, void (*entry)()) { - /* not yet implemented */ + /* example + ; put thunk pointer in g1 + 0: 03 00 00 00 sethi %hi(0), %g1 + 4: 82 10 60 00 or %g1, 0, %g1 + ; use g2 for entry pointer and "call" it, b/c branch instructions can't handle 32bit addresses + 8: 05 00 00 00 sethi %hi(0), %g2 + 12: 84 10 a0 00 or %g2, 0, %g2 + ; jump - write link to %g0, effectively discarding it; also nop for delay slot + 16: 81 c0 80 00 jmpl %g2, %g0 + 20: 01 00 00 00 nop +*/ + + p->code[0] = 0x03000000 | ((unsigned int)p >> 10); /* sethi %hi(p), %g1 -- hi 22 bits */ + p->code[1] = 0x82106000 | ((unsigned int)p & 0x3ff); /* or %g1, <p&0x3ff>, %g1 -- lo 10 bits */ + p->code[2] = 0x05000000 | ((unsigned int)entry >> 10); /* sethi %hi(entry), %g2 */ + p->code[3] = 0x8410a000 | ((unsigned int)entry & 0x3ff); /* or %g2, <entry&0x3ff>, %g2 */ + p->code[4] = 0x81c08000; /* jmpl %g2, %g0 -- discards link addr */ + p->code[5] = 0x01000000; /* nop */ }