__sigtramp2.S revision 1.4
11.4Sskrll/* $NetBSD: __sigtramp2.S,v 1.4 2020/10/15 05:50:15 skrll Exp $ */ 21.1Suwe 31.1Suwe/*- 41.1Suwe * Copyright (c) 2003 The NetBSD Foundation, Inc. 51.1Suwe * All rights reserved. 61.1Suwe * 71.1Suwe * This code is derived from software contributed to The NetBSD Foundation 81.1Suwe * by Jason R. Thorpe. 91.1Suwe * 101.1Suwe * Redistribution and use in source and binary forms, with or without 111.1Suwe * modification, are permitted provided that the following conditions 121.1Suwe * are met: 131.1Suwe * 1. Redistributions of source code must retain the above copyright 141.1Suwe * notice, this list of conditions and the following disclaimer. 151.1Suwe * 2. Redistributions in binary form must reproduce the above copyright 161.1Suwe * notice, this list of conditions and the following disclaimer in the 171.1Suwe * documentation and/or other materials provided with the distribution. 181.1Suwe * 191.1Suwe * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 201.1Suwe * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 211.1Suwe * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 221.1Suwe * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 231.1Suwe * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 241.1Suwe * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 251.1Suwe * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 261.1Suwe * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 271.1Suwe * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 281.1Suwe * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 291.1Suwe * POSSIBILITY OF SUCH DAMAGE. 301.1Suwe */ 311.1Suwe 321.1Suwe#include "SYS.h" 331.1Suwe 341.1Suwe/* 351.1Suwe * The SH signal trampoline is invoked only to return from 361.1Suwe * the signal; the kernel calls the signal handler directly. 371.1Suwe * 381.1Suwe * On entry, stack looks like: 391.1Suwe * 401.1Suwe * siginfo structure 411.1Suwe * sp-> ucontext structure 421.1Suwe * 431.1Suwe * NB: This order is different from what other ports use (siginfo at 441.1Suwe * the top of the stack), because we want to avoid wasting two 451.1Suwe * instructions to skip to the ucontext. Not that this order really 461.4Sskrll * matters, but I think this inconsistency deserves an explanation. 471.1Suwe */ 481.1SuweNENTRY(__sigtramp_siginfo_2) 491.1Suwe mov r15, r4 /* get pointer to ucontext */ 501.1Suwe SYSTRAP(setcontext) /* and call setcontext() */ 511.1Suwe mov r0, r4 /* exit with errno */ 521.1Suwe SYSTRAP(exit) /* if sigreturn fails */ 531.2Suwe 541.2Suwe SET_ENTRY_SIZE(__sigtramp_siginfo_2) 55