swapcontext.S revision 1.1.2.1
1 1.1.2.1 nathanw /* $NetBSD: swapcontext.S,v 1.1.2.1 2001/03/05 23:34:37 nathanw Exp $ */ 2 1.1.2.1 nathanw 3 1.1.2.1 nathanw /*- 4 1.1.2.1 nathanw * Copyright (c) 1999 The NetBSD Foundation, Inc. 5 1.1.2.1 nathanw * All rights reserved. 6 1.1.2.1 nathanw * 7 1.1.2.1 nathanw * This code is derived from software contributed to The NetBSD Foundation 8 1.1.2.1 nathanw * by Klaus Klein. 9 1.1.2.1 nathanw * 10 1.1.2.1 nathanw * Redistribution and use in source and binary forms, with or without 11 1.1.2.1 nathanw * modification, are permitted provided that the following conditions 12 1.1.2.1 nathanw * are met: 13 1.1.2.1 nathanw * 1. Redistributions of source code must retain the above copyright 14 1.1.2.1 nathanw * notice, this list of conditions and the following disclaimer. 15 1.1.2.1 nathanw * 2. Redistributions in binary form must reproduce the above copyright 16 1.1.2.1 nathanw * notice, this list of conditions and the following disclaimer in the 17 1.1.2.1 nathanw * documentation and/or other materials provided with the distribution. 18 1.1.2.1 nathanw * 3. All advertising materials mentioning features or use of this software 19 1.1.2.1 nathanw * must display the following acknowledgement: 20 1.1.2.1 nathanw * This product includes software developed by the NetBSD 21 1.1.2.1 nathanw * Foundation, Inc. and its contributors. 22 1.1.2.1 nathanw * 4. Neither the name of The NetBSD Foundation nor the names of its 23 1.1.2.1 nathanw * contributors may be used to endorse or promote products derived 24 1.1.2.1 nathanw * from this software without specific prior written permission. 25 1.1.2.1 nathanw * 26 1.1.2.1 nathanw * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 1.1.2.1 nathanw * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 1.1.2.1 nathanw * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 1.1.2.1 nathanw * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 1.1.2.1 nathanw * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 1.1.2.1 nathanw * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 1.1.2.1 nathanw * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 1.1.2.1 nathanw * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 1.1.2.1 nathanw * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 1.1.2.1 nathanw * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 1.1.2.1 nathanw * POSSIBILITY OF SUCH DAMAGE. 37 1.1.2.1 nathanw */ 38 1.1.2.1 nathanw 39 1.1.2.1 nathanw #include <machine/asm.h> 40 1.1.2.1 nathanw #if defined(LIBC_SCCS) && !defined(lint) 41 1.1.2.1 nathanw RCSID("$NetBSD: swapcontext.S,v 1.1.2.1 2001/03/05 23:34:37 nathanw Exp $") 42 1.1.2.1 nathanw #endif /* LIBC_SCCS && !lint */ 43 1.1.2.1 nathanw 44 1.1.2.1 nathanw ENTRY(swapcontext) 45 1.1.2.1 nathanw movl 4(%esp),%ecx 46 1.1.2.1 nathanw PIC_PROLOGUE 47 1.1.2.1 nathanw pushl %ecx /* push oucp */ 48 1.1.2.1 nathanw #ifdef PIC 49 1.1.2.1 nathanw call PIC_PLT(_C_LABEL(getcontext)) 50 1.1.2.1 nathanw #else 51 1.1.2.1 nathanw call _C_LABEL(getcontext) 52 1.1.2.1 nathanw #endif 53 1.1.2.1 nathanw addl $4,%esp /* pop oucp */ 54 1.1.2.1 nathanw PIC_EPILOGUE 55 1.1.2.1 nathanw testl %eax,%eax 56 1.1.2.1 nathanw jnz 2f 57 1.1.2.1 nathanw movl 4(%esp),%ecx 58 1.1.2.1 nathanw movl 0(%esp),%edx 59 1.1.2.1 nathanw movl %edx,(36 + 14 * 4)(%ecx) /* Adjust saved %eip ... */ 60 1.1.2.1 nathanw #ifdef PIC 61 1.1.2.1 nathanw movl %ebx,(36 + 8 * 4)(%ecx) /* ... clobbered PIC reg ... */ 62 1.1.2.1 nathanw leal 12(%esp),%edx 63 1.1.2.1 nathanw #else 64 1.1.2.1 nathanw leal 8(%esp),%edx 65 1.1.2.1 nathanw #endif 66 1.1.2.1 nathanw movl %edx,(36 + 17 * 36)(%ecx) /* ... and %esp. */ 67 1.1.2.1 nathanw /* Note: oucp->%eax has been cleared by getcontext(). */ 68 1.1.2.1 nathanw movl 8(%esp),%ecx 69 1.1.2.1 nathanw PIC_PROLOGUE 70 1.1.2.1 nathanw pushl %ecx /* push ucp */ 71 1.1.2.1 nathanw #ifdef PIC 72 1.1.2.1 nathanw call PIC_PLT(_C_LABEL(setcontext)) 73 1.1.2.1 nathanw #else 74 1.1.2.1 nathanw call _C_LABEL(setcontext) 75 1.1.2.1 nathanw #endif 76 1.1.2.1 nathanw addl $4,%esp /* pop ucp */ 77 1.1.2.1 nathanw PIC_EPILOGUE 78 1.1.2.1 nathanw /* No need to error-check: setcontext() must have failed. */ 79 1.1.2.1 nathanw 2: ret 80
Indexes created Sun Oct 19 02:09:48 GMT 2025