1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22/* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27#pragma ident "%Z%%M% %I% %E% SMI" 28 29 .file "%M%" 30 31#include "SYS.h" 32#include <../assym.h> 33 34/* Cancellation/thr_exit() stuff */ 35 36/* 37 * _ex_unwind_local(void) 38 * 39 * Called only from _t_cancel(). 40 * Unwind two frames and invoke _t_cancel(fp) again. 41 * 42 * Before this the call stack is: f4 f3 f2 f1 _t_cancel 43 * After this the call stack is: f4 f3 f2 _t_cancel 44 * (as if "call f1" is replaced by "call _t_cancel(fp)" in f2) 45 */ 46 ENTRY(_ex_unwind_local) 47 restore 48 restore 49 ba _t_cancel ! tailcall _t_cancel(fp) 50 mov %fp, %o0 ! passing the frame pointer 51 SET_SIZE(_ex_unwind_local) 52 53/* 54 * _ex_clnup_handler(void *arg, void (*clnup)(void *)) 55 * 56 * Called only from _t_cancel(). 57 * Unwind one frame, call the cleanup handler with argument arg from the 58 * restored frame, then jump to _t_cancel(fp) again from the restored frame. 59 */ 60 ENTRY(_ex_clnup_handler) 61 mov %o1, %i1 ! handler address -> %o1 after restore 62 restore %o0, %g0, %o0 ! handler arg -> %o0 after restore 63 stn %o7, [%g7 + UL_UNWIND_RET] ! save caller's return address 64 jmpl %o1, %o7 ! invoke func with arg 65 nop ! and return here 66 ldn [%g7 + UL_UNWIND_RET], %o7 ! restore return address 67 ba _t_cancel ! tailcall _t_cancel(fp) 68 mov %fp, %o0 ! passing the frame pointer 69 SET_SIZE(_ex_clnup_handler) 70 71/* 72 * _thrp_unwind(void *arg) 73 * 74 * Ignore the argument; jump to _t_cancel(fp) with caller's fp 75 */ 76 ENTRY(_thrp_unwind) 77 ba _t_cancel ! tailcall _t_cancel(fp) 78 mov %fp, %o0 ! passing the frame pointer 79 SET_SIZE(_thrp_unwind) 80