swapcontext.S revision 1.6
1 1.6 manu /* $NetBSD: swapcontext.S,v 1.6 2012/09/12 02:00:53 manu Exp $ */ 2 1.2 thorpej 3 1.2 thorpej /*- 4 1.2 thorpej * Copyright (c) 2001 The NetBSD Foundation, Inc. 5 1.2 thorpej * All rights reserved. 6 1.2 thorpej * 7 1.2 thorpej * This code is derived from software contributed to The NetBSD Foundation 8 1.2 thorpej * by Klaus Klein. 9 1.2 thorpej * 10 1.2 thorpej * Redistribution and use in source and binary forms, with or without 11 1.2 thorpej * modification, are permitted provided that the following conditions 12 1.2 thorpej * are met: 13 1.2 thorpej * 1. Redistributions of source code must retain the above copyright 14 1.2 thorpej * notice, this list of conditions and the following disclaimer. 15 1.2 thorpej * 2. Redistributions in binary form must reproduce the above copyright 16 1.2 thorpej * notice, this list of conditions and the following disclaimer in the 17 1.2 thorpej * documentation and/or other materials provided with the distribution. 18 1.2 thorpej * 19 1.2 thorpej * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.2 thorpej * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.2 thorpej * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.2 thorpej * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.2 thorpej * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.2 thorpej * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.2 thorpej * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.2 thorpej * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.2 thorpej * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.2 thorpej * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.2 thorpej * POSSIBILITY OF SUCH DAMAGE. 30 1.2 thorpej */ 31 1.2 thorpej 32 1.2 thorpej #include "SYS.h" 33 1.2 thorpej 34 1.2 thorpej #if defined(LIBC_SCCS) && !defined(lint) 35 1.6 manu RCSID("$NetBSD: swapcontext.S,v 1.6 2012/09/12 02:00:53 manu Exp $") 36 1.2 thorpej #endif /* LIBC_SCCS && !lint */ 37 1.3 petrov 38 1.2 thorpej 39 1.2 thorpej ENTRY(swapcontext) 40 1.2 thorpej mov %o0, %o2 /* must save pointer */ 41 1.2 thorpej mov %o1, %o3 /* must save pointer */ 42 1.2 thorpej mov SYS_getcontext, %g1 43 1.2 thorpej t ST_SYSCALL 44 1.2 thorpej bcc,a 1f 45 1.2 thorpej stx %g0, [%o2 + 64 + 11 * 8] /* gr[_REG_O0] = 0 */ 46 1.2 thorpej ERROR() 47 1.2 thorpej 1: 48 1.2 thorpej add %o7, 12, %o1 49 1.2 thorpej stx %o1, [%o2 + 64 + 2 * 8] /* gr[_REG_nPC] = retaddr + 4 */ 50 1.2 thorpej add %o7, 8, %o1 51 1.2 thorpej stx %o1, [%o2 + 64 + 1 * 8] /* gr[_REG_PC] = retaddr */ 52 1.2 thorpej 53 1.6 manu #ifdef PIC 54 1.6 manu PIC_PROLOGUE(%g5,%o4) /* %g5 = _GLOBAL_OFFSET_TABLE */ 55 1.6 manu #ifdef BIGPIC 56 1.6 manu set _C_LABEL(setcontext), %o6 57 1.6 manu ldx [%g5+%o6], %o5 58 1.6 manu #else 59 1.6 manu ldx [%g5+_C_LABEL(setcontext)], %o5 60 1.6 manu #endif 61 1.6 manu jmp %o5 62 1.6 manu mov %o3, %o0 63 1.6 manu #else 64 1.6 manu ba,a _C_LABEL(setcontext) 65 1.6 manu mov %o3, %o0 66 1.6 manu #endif 67
Indexes created Mon Sep 29 21:09:56 GMT 2025