1 /* $NetBSD: setjmp.S,v 1.12 2023/10/11 09:12:21 skrll 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 1.12 2023/10/11 09:12:21 skrll 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 0, %o0 /* 0 - is ignored. */ 85 /* sigprocmask(0, (sigset_t *)NULL, (sigset_t *)a) */ 86 #if __PIC__ - 0 >= 2 87 set _C_LABEL(__sigprocmask14), %o4 88 ldx [%i1 + %o4], %g2 89 call %g2 90 #elif __PIC__ - 0 >= 1 91 ldx [%i1 + _C_LABEL(__sigprocmask14)], %g2 92 call %g2 93 #else 94 call _C_LABEL(__sigprocmask14) 95 #endif 96 clr %o1 97 98 clr %o0 /* sigstack(NULL, &foo) */ 99 #if __PIC__ - 0 >= 2 100 set _C_LABEL(__sigaltstack14), %o4 101 ldx [%i1 + %o4], %g2 102 call %g2 103 #elif __PIC__ - 0 >= 1 104 ldx [%i1 + _C_LABEL(__sigaltstack14)], %g2 105 call %g2 106 #else 107 call _C_LABEL(__sigaltstack14) 108 #endif 109 add %i0, 8, %o1 /* (foo being part of the sigcontext we're overwriting) */ 110 111 lduw [%i0 + 8 + 0x10], %o0 /* foo.ss_flags */ 112 and %o0, 1, %o1 /* onstack = foo.ss_flags & SS_ONSTACK; */ 113 st %o1, [%i0 + 0x00] /* sc.sc_onstack = current onstack; */ 114 115 /* store essential state */ 116 stx %fp, [%i0 + 0x08] /* sc.sc_sp = sp */ 117 add %i7, 8, %o0 118 stx %o0, [%i0 + 0x10] /* sc.sc_pc = return_pc */ 119 stx %g0, [%i0 + 0x20] /* sc.sc_tstate = (clean ccr) */ 120 stx %l1, [%i0 + 0x28] /* sc.sc_g1 */ 121 stx %l2, [%i0 + 0x30] /* sc.sc_o0, set in longjmp, use as %g2 */ 122 /* 0x38: 4x32bit */ /* sc.sc_mask was already saved above */ 123 124 /* save additional registers needed to fill a complete mcontext */ 125 stx %l3, [%i0 + 0x48] /* adjust asserts in longjmp.c */ 126 stx %l6, [%i0 + 0x50] /* if you change any of these */ 127 stx %l7, [%i0 + 0x58] /* offsets! */ 128 129 ret /* return 0 */ 130 restore %g0, 0, %o0 131
Indexes created Sat Sep 20 22:09:52 GMT 2025