11.15Smatt/* $NetBSD: setjmp.S,v 1.15 2013/07/17 03:05:41 matt Exp $ */ 21.5Sthorpej 31.1Spaulus/*- 41.1Spaulus * Copyright (c) 1990 The Regents of the University of California. 51.1Spaulus * All rights reserved. 61.1Spaulus * 71.1Spaulus * This code is derived from software contributed to Berkeley by 81.1Spaulus * the Systems Programming Group of the University of Utah Computer 91.1Spaulus * Science Department. 101.1Spaulus * 111.1Spaulus * Redistribution and use in source and binary forms, with or without 121.1Spaulus * modification, are permitted provided that the following conditions 131.1Spaulus * are met: 141.1Spaulus * 1. Redistributions of source code must retain the above copyright 151.1Spaulus * notice, this list of conditions and the following disclaimer. 161.1Spaulus * 2. Redistributions in binary form must reproduce the above copyright 171.1Spaulus * notice, this list of conditions and the following disclaimer in the 181.1Spaulus * documentation and/or other materials provided with the distribution. 191.11Sagc * 3. Neither the name of the University nor the names of its contributors 201.1Spaulus * may be used to endorse or promote products derived from this software 211.1Spaulus * without specific prior written permission. 221.1Spaulus * 231.1Spaulus * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 241.1Spaulus * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 251.1Spaulus * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 261.1Spaulus * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 271.1Spaulus * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 281.1Spaulus * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 291.1Spaulus * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 301.1Spaulus * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 311.1Spaulus * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 321.1Spaulus * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 331.1Spaulus * SUCH DAMAGE. 341.1Spaulus */ 351.1Spaulus 361.6Sthorpej#include <machine/asm.h> 371.15Smatt#include "assym.h" 381.5Sthorpej 391.1Spaulus#if defined(LIBC_SCCS) && !defined(lint) 401.5Sthorpej#if 0 411.5Sthorpej RCSID("from: @(#)setjmp.s 5.1 (Berkeley) 5/12/90") 421.5Sthorpej#else 431.15Smatt RCSID("$NetBSD: setjmp.S,v 1.15 2013/07/17 03:05:41 matt Exp $") 441.5Sthorpej#endif 451.1Spaulus#endif /* LIBC_SCCS and not lint */ 461.1Spaulus 471.1Spaulus/* 481.1Spaulus * C library -- setjmp, longjmp 491.1Spaulus * 501.1Spaulus * longjmp(a,v) 511.1Spaulus * will generate a "return(v)" from 521.1Spaulus * the last call to 531.1Spaulus * setjmp(a) 541.1Spaulus * by restoring registers from the stack, 551.1Spaulus * and a struct sigcontext, see <signal.h> 561.1Spaulus */ 571.1Spaulus 581.12SchristosENTRY(__setjmp14) 591.12Schristos /* Get signal stack info. Note overlay of ss_sp and ss_size! */ 601.13Smatt lea -12(%sp),%sp /* sizeof(stack_t) */ 611.13Smatt clrl (%sp) /* ss = NULL */ 621.13Smatt movl %sp,4(%sp) /* oss = stack_t on stack */ 631.9Sitohy jbsr PIC_PLT(_C_LABEL(__sigaltstack14)) 641.12Schristos 651.13Smatt movl 8(%sp),%d0 /* ss_flags */ 661.12Schristos andl #1,%d0 /* extract SS_ONSTACK */ 671.13Smatt lea 12(%sp),%sp /* pop stack_t */ 681.12Schristos 691.12Schristos /* Get pointer to jmp_buf; a sigcontext is at the beginning. */ 701.13Smatt movl 4(%sp),%a0 711.15Smatt movl %d0,SC_ONSTACK(%a0) /* store onstack */ 721.15Smatt clrl SC___MASK13(%a0) /* unused word (old style signal mask) */ 731.12Schristos 741.12Schristos /* Get the signal mask. */ 751.15Smatt pea SC_MASK(%a0) /* oset = &sc.sc_mask */ 761.13Smatt movl #0,-(%sp) /* set = NULL */ 771.13Smatt movl #0,-(%sp) /* action = 0 <ignored> */ 781.12Schristos jbsr PIC_PLT(_C_LABEL(__sigprocmask14)) 791.12Schristos addl #12,%sp 801.12Schristos 811.13Smatt movl 4(%sp),%a0 /* get jmp_buf pointer again */ 821.13Smatt lea 4(%sp),%a1 /* adjust SP since we won't rts */ 831.15Smatt movl %a1,SC_SP(%a0) /* save SP */ 841.15Smatt movl %a6,SC_FP(%a0) /* save FP */ 851.15Smatt clrl SC_AP(%a0) /* no AP */ 861.15Smatt movl (%sp),SC_PC(%a0)/* save return PC */ 871.15Smatt clrl SC_PS(%a0) /* clear PS */ 881.12Schristos 891.12Schristos /* Save remaining non-scratch regs after signal mask. */ 901.15Smatt moveml #0x3CFC,SC_SIZE(%a0) 911.12Schristos 921.10Sthorpej clrl %d0 /* return 0 */ 931.1Spaulus rts 941.14SmattEND(__setjmp14) 95