setjmp.S revision 1.7
1 /* $NetBSD: setjmp.S,v 1.7 2005/10/16 17:15:38 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This software was developed by the Computer Systems Engineering group 8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 9 * contributed to Berkeley. 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 * from: Header: setjmp.s,v 1.2 92/06/25 03:18:43 torek Exp 36 */ 37 38 #define _LOCORE 39 #include <machine/asm.h> 40 #include <machine/frame.h> 41 #if defined(LIBC_SCCS) && !defined(lint) 42 #if 0 43 .asciz "@(#)setjmp.s 8.1 (Berkeley) 6/4/93" 44 #else 45 RCSID("$NetBSD: setjmp.S,v 1.7 2005/10/16 17:15:38 christos Exp $") 46 #endif 47 #endif /* LIBC_SCCS and not lint */ 48 49 /* 50 * C library -- setjmp 51 * 52 * __longjmp14(a,v) 53 * will generate a "return(v)" from 54 * the last call to 55 * setjmp(a) 56 * by restoring registers from the stack, 57 * and a struct sigcontext, see <signal.h> 58 */ 59 60 #include "SYS.h" 61 62 .register %g2,#ignore 63 .register %g3,#ignore 64 .register %g6,#ignore 65 66 ENTRY(__setjmp14) 67 save %sp, -CC64FSZ, %sp 68 69 /* save globals into locals */ 70 mov %g1, %l1 71 mov %g2, %l2 72 mov %g3, %l3 73 mov %g4, %l4 74 mov %g5, %l5 75 mov %g6, %l6 76 mov %g7, %l7 77 78 #ifdef PIC 79 PIC_PROLOGUE(%i1, %o4) 80 #endif 81 82 /* now get sigmask and onstack flag */ 83 add %i0, 0x38, %o2 /* build sigcontext in [%o2]->sc.sc_mask */ 84 mov 1, %o0 /* SIG_BLOCK */ 85 /* sigprocmask(SIG_BLOCK, (sigset_t *)NULL, (sigset_t *)a) */ 86 #ifdef PIC 87 #ifdef BIGPIC 88 set _C_LABEL(__sigprocmask14), %o4 89 ldx [%i1 + %o4], %g2 90 #else 91 ldx [%i1 + _C_LABEL(__sigprocmask14)], %g2 92 #endif 93 call %g2 94 #else 95 call _C_LABEL(__sigprocmask14) 96 #endif 97 clr %o1 98 99 clr %o0 /* sigstack(NULL, &foo) */ 100 #ifdef PIC 101 #ifdef BIGPIC 102 set _C_LABEL(__sigaltstack14), %o4 103 ldx [%i1 + %o4], %g2 104 #else 105 ldx [%i1 + _C_LABEL(__sigaltstack14)], %g2 106 #endif 107 call %g2 108 #else 109 call _C_LABEL(__sigaltstack14) 110 #endif 111 add %i0, 8, %o1 /* (foo being part of the sigcontext we're overwriting) */ 112 113 lduw [%i0 + 8 + 0x10], %o0 /* foo.ss_flags */ 114 and %o0, 1, %o1 /* onstack = foo.ss_flags & SS_ONSTACK; */ 115 st %o1, [%i0 + 0x00] /* sc.sc_onstack = current onstack; */ 116 117 /* store essential state */ 118 stx %fp, [%i0 + 0x08] /* sc.sc_sp = sp */ 119 add %i7, 8, %o0 120 stx %o0, [%i0 + 0x10] /* sc.sc_pc = return_pc */ 121 add %i7, 12, %o0 122 stx %o0, [%i0 + 0x18] /* sc.sc_npc = return_pc + 4 */ 123 stx %g0, [%i0 + 0x20] /* sc.sc_tstate = (clean ccr) */ 124 stx %l1, [%i0 + 0x28] /* sc.sc_g1 */ 125 stx %l2, [%i0 + 0x30] /* sc.sc_o0, set in longjmp, use as %g2 */ 126 /* 0x38 */ /* sc.sc_mask was already saved above */ 127 128 /* save additional registers needed to fill a complete mcontext */ 129 stx %l3, [%i0 + 0x40] 130 stx %l4, [%i0 + 0x48] 131 stx %l5, [%i0 + 0x50] 132 stx %l6, [%i0 + 0x58] 133 stx %l7, [%i0 + 0x60] 134 135 ret /* return 0 */ 136 restore %g0, 0, %o0 137
Indexes created Sun Sep 28 07:09:56 GMT 2025