1/* $NetBSD: setjmp.S,v 1.14 2013/07/16 22:12:20 matt Exp $ */ 2 3/*- 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * the Systems Programming Group of the University of Utah Computer 9 * Science Department. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36#include <machine/asm.h> 37#include "assym.h" 38 39#if defined(LIBC_SCCS) && !defined(lint) 40#if 0 41 RCSID("from: @(#)setjmp.s 5.1 (Berkeley) 5/12/90") 42#else 43 RCSID("$NetBSD: setjmp.S,v 1.14 2013/07/16 22:12:20 matt Exp $") 44#endif 45#endif /* LIBC_SCCS and not lint */ 46 47/* 48 * C library -- setjmp, longjmp 49 * 50 * longjmp(a,v) 51 * will generate a "return(v)" from 52 * the last call to 53 * setjmp(a) 54 * by restoring registers from the stack, 55 * and a struct sigcontext, see <signal.h> 56 */ 57 58ENTRY(__setjmp14) 59 /* Get signal stack info. Note overlay of ss_sp and ss_size! */ 60 lea -12(%sp),%sp /* sizeof(stack_t) */ 61 clrl (%sp) /* ss = NULL */ 62 movl %sp,4(%sp) /* oss = stack_t on stack */ 63 jbsr PIC_PLT(_C_LABEL(__sigaltstack14)) 64 65 movl 8(%sp),%d0 /* ss_flags */ 66 andl #1,%d0 /* extract SS_ONSTACK */ 67 lea 12(%sp),%sp /* pop stack_t */ 68 69 /* Get pointer to jmp_buf; a sigcontext is at the beginning. */ 70 movl 4(%sp),%a0 71 movl %d0,SC_ONSTACK(%a0) /* store onstack */ 72 clrl SC___MASK13(%a0) /* unused word (old style signal mask) */ 73 74 /* Get the signal mask. */ 75 pea SC_MASK(%a0) /* oset = &sc.sc_mask */ 76 movl #0,-(%sp) /* set = NULL */ 77 movl #0,-(%sp) /* action = 0 <ignored> */ 78 jbsr PIC_PLT(_C_LABEL(__sigprocmask14)) 79 addl #12,%sp 80 81 movl 4(%sp),%a0 /* get jmp_buf pointer again */ 82 lea 4(%sp),%a1 /* adjust SP since we won't rts */ 83 movl %a1,SC_SP(%a0) /* save SP */ 84 movl %a6,SC_FP(%a0) /* save FP */ 85 clrl SC_AP(%a0) /* no AP */ 86 movl (%sp),SC_PC(%a0)/* save return PC */ 87 clrl SC_PS(%a0) /* clear PS */ 88 89 /* Save remaining non-scratch regs after signal mask. */ 90 moveml #0x3CFC,SC_SIZE(%a0) 91 92 clrl %d0 /* return 0 */ 93 rts 94END(__setjmp14) 95