Mercurial > pub > dyncall > dyncall
view dyncallback/dyncall_callback_sparc32.s @ 157:49549739228c
- sparc callback asm and args code (still some stack alignment issues, currently)
- doc improvements for sparc callconv
author | cslag |
---|---|
date | Wed, 28 Dec 2016 16:48:35 -0600 |
parents | bbefb8b8e74c |
children | de5ed248757f |
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/* Package: dyncall Library: dyncallback File: dyncallback/dyncall_callback_sparc32.s Description: Callback Thunk - Implementation for Sparc 32-bit License: 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 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. */ /* input: $i0 -> thunk $i0+24 -> cb handler $i0+28 -> userdata */ .text .globl dcCallbackThunkEntry /* Called by thunk - thunk stores pointer to DCCallback */ /* in %g1, and pointer to called function in %g2 */ dcCallbackThunkEntry: /* Prolog. */ /* Frame size of 80b comes from needing storage space for the following: */ /* DCargs(sparc_req_reg_save_area:64 + argptr:4) + pad:4 + retval:8 */ save %sp, -80, %sp /* Spill register args. */ st %i0, [ %fp + 68 ] /* reg arg 0 */ st %i1, [ %fp + 72 ] /* reg arg 1 */ st %i2, [ %fp + 76 ] /* reg arg 2 */ st %i3, [ %fp + 80 ] /* reg arg 3 */ st %i4, [ %fp + 84 ] /* reg arg 4 */ st %i5, [ %fp + 88 ] /* reg arg 5 */ add %fp, 68, %l0 st %l0, [ %sp + 64 ] /* init arg_ptr */ /* Zero retval store (for data < word size). */ st %g0, [ %sp + 72 ] st %g0, [ %sp + 76 ] /* Prepare callback handler call. */ mov %g1, %o0 /* Param 0 = DCCallback*, %g1 holds ptr to thunk */ add %sp, 64, %o1 /* Param 1 = DCArgs* (ptr to struct with args ptr */ add %sp, 72, %o2 /* Param 2 = results ptr to 8b of local stack data */ ld [ %g1 + 28 ], %o3 /* Param 3 = userdata ptr */ ld [ %g1 + 24 ], %l0 call %l0 nop /* Put retval in %i0/%i1 (to be in caller's %o0/%o1), and %f0/%f1. */ ld [ %sp + 72 ], %i0 ld [ %sp + 76 ], %i1 ld [ %sp + 72 ], %f0 ld [ %sp + 76 ], %f1 /* Epilog. */ restore /* unshift reg window */ retl /* Return from proc. -- jmpl %i7 + 8, %g0 */ nop