10Sstevel@tonic-gate/* 20Sstevel@tonic-gate * CDDL HEADER START 30Sstevel@tonic-gate * 40Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*7298SMark.J.Nelson@Sun.COM * Common Development and Distribution License (the "License"). 6*7298SMark.J.Nelson@Sun.COM * You may not use this file except in compliance with the License. 70Sstevel@tonic-gate * 80Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 90Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 100Sstevel@tonic-gate * See the License for the specific language governing permissions 110Sstevel@tonic-gate * and limitations under the License. 120Sstevel@tonic-gate * 130Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 140Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 150Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 160Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 170Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 180Sstevel@tonic-gate * 190Sstevel@tonic-gate * CDDL HEADER END 200Sstevel@tonic-gate */ 210Sstevel@tonic-gate/* 220Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 230Sstevel@tonic-gate * Use is subject to license terms. 240Sstevel@tonic-gate */ 250Sstevel@tonic-gate 26*7298SMark.J.Nelson@Sun.COM .file "unwind_frame.s" 270Sstevel@tonic-gate 280Sstevel@tonic-gate#include "SYS.h" 290Sstevel@tonic-gate#include <../assym.h> 300Sstevel@tonic-gate 310Sstevel@tonic-gate/* Cancellation/thr_exit() stuff */ 320Sstevel@tonic-gate 330Sstevel@tonic-gate/* 340Sstevel@tonic-gate * _ex_unwind_local(void) 350Sstevel@tonic-gate * 360Sstevel@tonic-gate * Called only from _t_cancel(). 370Sstevel@tonic-gate * Unwind two frames and invoke _t_cancel(fp) again. 380Sstevel@tonic-gate * 390Sstevel@tonic-gate * Before this the call stack is: f4 f3 f2 f1 _t_cancel 400Sstevel@tonic-gate * After this the call stack is: f4 f3 f2 _t_cancel 410Sstevel@tonic-gate * (as if "call f1" is replaced by "call _t_cancel(fp)" in f2) 420Sstevel@tonic-gate */ 430Sstevel@tonic-gate ENTRY(_ex_unwind_local) 440Sstevel@tonic-gate restore 450Sstevel@tonic-gate restore 460Sstevel@tonic-gate ba _t_cancel ! tailcall _t_cancel(fp) 470Sstevel@tonic-gate mov %fp, %o0 ! passing the frame pointer 480Sstevel@tonic-gate SET_SIZE(_ex_unwind_local) 490Sstevel@tonic-gate 500Sstevel@tonic-gate/* 510Sstevel@tonic-gate * _ex_clnup_handler(void *arg, void (*clnup)(void *)) 520Sstevel@tonic-gate * 530Sstevel@tonic-gate * Called only from _t_cancel(). 540Sstevel@tonic-gate * Unwind one frame, call the cleanup handler with argument arg from the 550Sstevel@tonic-gate * restored frame, then jump to _t_cancel(fp) again from the restored frame. 560Sstevel@tonic-gate */ 570Sstevel@tonic-gate ENTRY(_ex_clnup_handler) 580Sstevel@tonic-gate mov %o1, %i1 ! handler address -> %o1 after restore 590Sstevel@tonic-gate restore %o0, %g0, %o0 ! handler arg -> %o0 after restore 600Sstevel@tonic-gate stn %o7, [%g7 + UL_UNWIND_RET] ! save caller's return address 610Sstevel@tonic-gate jmpl %o1, %o7 ! invoke func with arg 620Sstevel@tonic-gate nop ! and return here 630Sstevel@tonic-gate ldn [%g7 + UL_UNWIND_RET], %o7 ! restore return address 640Sstevel@tonic-gate ba _t_cancel ! tailcall _t_cancel(fp) 650Sstevel@tonic-gate mov %fp, %o0 ! passing the frame pointer 660Sstevel@tonic-gate SET_SIZE(_ex_clnup_handler) 670Sstevel@tonic-gate 680Sstevel@tonic-gate/* 690Sstevel@tonic-gate * _thrp_unwind(void *arg) 700Sstevel@tonic-gate * 710Sstevel@tonic-gate * Ignore the argument; jump to _t_cancel(fp) with caller's fp 720Sstevel@tonic-gate */ 730Sstevel@tonic-gate ENTRY(_thrp_unwind) 740Sstevel@tonic-gate ba _t_cancel ! tailcall _t_cancel(fp) 750Sstevel@tonic-gate mov %fp, %o0 ! passing the frame pointer 760Sstevel@tonic-gate SET_SIZE(_thrp_unwind) 77