_setjmp.S revision 1.10
1 /* $NetBSD: _setjmp.S,v 1.10 2014/07/12 19:11:57 nakayama Exp $ */ 2 3 /*- 4 * Copyright (c) 1999 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Paul Kranenburg. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <machine/asm.h> 33 #include <machine/trap.h> 34 35 #if defined(LIBC_SCCS) && !defined(lint) 36 RCSID("$NetBSD: _setjmp.S,v 1.10 2014/07/12 19:11:57 nakayama Exp $") 37 #endif /* LIBC_SCCS and not lint */ 38 39 /* 40 * C library -- _setjmp, _longjmp 41 * 42 * _longjmp(a,v) 43 * will generate a "return(v?v:1)" from 44 * the last call to 45 * _setjmp(a) 46 * The previous signal state is NOT restored. 47 */ 48 49 ENTRY(_setjmp) 50 /* store important globals, sigsetjmp compatible */ 51 st %g3, [%o0 + 16] 52 st %g2, [%o0 + 24] 53 st %g4, [%o0 + 48] 54 st %g7, [%o0 + 52] 55 56 st %sp, [%o0+0] /* store caller's stack pointer */ 57 st %o7, [%o0+4] /* and the return pc */ 58 retl 59 clr %o0 ! return 0 60 61 ENTRY(_longjmp) 62 #ifdef __sparc_v9__ 63 save %sp, -CCFSZ, %sp 64 flushw 65 /* 66 * We restore the saved stack pointer to %fp, then issue 67 * a `restore' instruction which will reload the register 68 * window from the stack. 69 */ 70 ld [%i0 + 16], %g3 71 ld [%i0 + 24], %g2 72 ld [%i0 + 48], %g4 73 ld [%i0 + 52], %g7 74 ld [%i0 + 4], %i7 /* restore return pc */ 75 ld [%i0 + 0], %fp /* and stack pointer */ 76 mov 1, %i0 77 movrnz %i1, %i1, %i0 ! compute v ? v : 1 78 ret 79 restore 80 #else 81 save %sp, -64, %sp ! set up a local stack frame 82 tst %i1 ! compute v ? v : 1 83 be,a 0f 84 mov 1, %i1 85 0: 86 t ST_FLUSHWIN ! flush register windows out to the stack 87 88 /* restore globals */ 89 ld [%i0 + 16], %g3 90 ld [%i0 + 24], %g2 91 ld [%i0 + 48], %g4 92 ld [%i0 + 52], %g7 93 94 /* 95 * We restore the saved stack pointer to %fp, then issue 96 * a `restore' instruction which will reload the register 97 * window from the stack. 98 */ 99 ld [%i0+4], %i7 /* restore return pc */ 100 ld [%i0+0], %fp /* and stack pointer */ 101 102 ret ! success, return %i1 103 restore %i1, 0, %o0 104 #endif 105
Indexes created Mon Oct 27 04:09:48 GMT 2025