/*- * Copyright (c) 2003 Peter Wemm <peter@FreeBSD.org> * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include <machine/asm.h> __FBSDID("$FreeBSD$"); #include <SYS.h> /* * This has to be magic to handle the multiple returns. * Otherwise, the setcontext() syscall will return here and we'll * pop off the return address and go to the *setcontext* call. */ WEAK_REFERENCE(__sys_getcontext, _getcontext) WEAK_REFERENCE(__sys_getcontext, getcontext) ENTRY(__sys_getcontext) movq (%rsp),%rsi /* save getcontext return address */ mov $SYS_getcontext,%rax KERNCALL jb HIDENAME(cerror) addq $8,%rsp /* remove stale (setcontext) return address */ jmp *%rsi /* restore return address */ END(__sys_getcontext) .section .note.GNU-stack,"",%progbits |