__setjmp14.S revision 1.2
1 /* $NetBSD: __setjmp14.S,v 1.2 2002/07/01 16:00:51 fredette Exp $ */ 2 3 /*- 4 * Copyright (c) 2002 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Matthew Fredette. 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <machine/asm.h> 40 /* XXX fredette - this is awful */ 41 #define _LOCORE 42 #include <machine/frame.h> 43 #undef _LOCORE 44 #include <machine/psl.h> 45 46 #if defined(LIBC_SCCS) && !defined(lint) 47 RCSID("$NetBSD: __setjmp14.S,v 1.2 2002/07/01 16:00:51 fredette Exp $") 48 #endif /* LIBC_SCCS and not lint */ 49 50 /* 51 * C library -- setjmp, longjmp 52 * 53 * longjmp(a,v) 54 * will generate a "return(v)" from 55 * the last call to 56 * setjmp(a) 57 * by restoring registers from the stack, 58 * and a struct sigcontext, see <signal.h> 59 */ 60 61 ENTRY(__setjmp14,0) 62 /* Finish our stack frame. */ 63 stw %rp, HPPA_FRAME_CRP(%sp) 64 stw %arg0, HPPA_FRAME_ARG(0)(%sp) 65 66 /* A sigcontext is at the beginning of our jmp_buf. */ 67 stw %r0, 4(%arg0) ; unused word (old style signal mask) 68 stw %sp, 8(%arg0) ; sc.sc_sp = %sp 69 stw %r0, 16(%arg0) ; sc.sc_ap = NULL 70 mfsp %sr0, %r1 71 stw %r1, 20(%arg0) ; sc.sc_pcsqh = %sr0 72 stw %rp, 24(%arg0) ; sc.sc_pcoqh = %rp 73 stw %r1, 28(%arg0) ; sc.sc_pcsqh = %sr0 74 ldo 4(%rp), %r1 75 stw %r1, 32(%arg0) ; sc.sc_pcoqt = %rp + 4 76 #define PSW_MBS (PSW_C|PSW_Q|PSW_P|PSW_D|PSW_I) 77 ldil L%PSW_MBS, %r1 78 ldo R%PSW_MBS(%r1), %r1 79 stw %r1, 36(%arg0) ; set sc.sc_ps 80 81 /* We store all callee-saved registers after the sigcontext. */ 82 ldo 56(%arg0), %r1 83 stwm %r3, 4(%r1) 84 stwm %r4, 4(%r1) 85 stwm %r5, 4(%r1) 86 stwm %r6, 4(%r1) 87 stwm %r7, 4(%r1) 88 stwm %r8, 4(%r1) 89 stwm %r9, 4(%r1) 90 stwm %r10, 4(%r1) 91 stwm %r11, 4(%r1) 92 stwm %r12, 4(%r1) 93 stwm %r13, 4(%r1) 94 stwm %r14, 4(%r1) 95 stwm %r15, 4(%r1) 96 stwm %r16, 4(%r1) 97 stwm %r17, 4(%r1) 98 stwm %r18, 4(%r1) 99 100 /* 101 * Start the stack frame for the calls we will make. 102 * The minimum frame is 48 bytes, but the stack must 103 * always be 64-byte aligned; we use the top 4 bytes 104 * to save our caller's %r3, and the following 12 bytes 105 * as the stack_t for our sigaltstack call. 106 * XXX - this assumes that sizeof(stack_t) <= 12 107 */ 108 copy %r3, %r1 109 copy %sp, %r3 110 stwm %r1, HPPA_FRAME_SIZE(%sp) 111 112 /* Get signal stack info. */ 113 ldo 4(%r3), %arg1 ; set up oss 114 bl __sigaltstack14, %rp 115 copy %r0, %arg0 ; set up ss 116 117 /* Recover our jmp_buf and extract SS_ONSTACK */ 118 ldw HPPA_FRAME_ARG(0)(%r3), %arg0 119 ldw 12(%r3), %r1 ; get ss_flags 120 ldi 1, %r20 ; SS_ONSTACK 121 and %r1, %r20, %r1 122 stw %r1, 0(%arg0) ; sc.sc_onstack 123 124 /* Get the signal mask. */ 125 ldo 40(%arg0), %arg2 ; oset = &sc.sc_mask 126 copy %r0, %arg1 ; set = NULL 127 bl __sigprocmask14, %rp 128 copy %r0, %arg0 ; action = 0 <ignored> 129 130 /* Return 0. */ 131 ldo HPPA_FRAME_SIZE(%r3),%sp 132 ldwm -HPPA_FRAME_SIZE(%sp),%r3 133 ldw HPPA_FRAME_CRP(%sp), %rp 134 bv %r0(%rp) 135 copy %r0, %ret0 136 EXIT(__setjmp14) 137 138 ENTRY(__longjmp14,0) 139 /* Finish our stack frame. */ 140 stw %rp, HPPA_FRAME_CRP(%sp) 141 stw %arg0, HPPA_FRAME_ARG(0)(%sp) 142 143 ldw 8(%arg0), %r1 ; ensure non-zero SP 144 combt,=,n %r0, %r1, botch ; oops! 145 add,<> %r0, %arg1, %ret0 ; ensure return value non-zero 146 ldi 1, %ret0 147 148 /* restore callee-saved registers */ 149 ldo 56(%arg0), %r1 150 ldwm 4(%r1), %r3 151 ldwm 4(%r1), %r4 152 ldwm 4(%r1), %r5 153 ldwm 4(%r1), %r6 154 ldwm 4(%r1), %r7 155 ldwm 4(%r1), %r8 156 ldwm 4(%r1), %r9 157 ldwm 4(%r1), %r10 158 ldwm 4(%r1), %r11 159 ldwm 4(%r1), %r12 160 ldwm 4(%r1), %r13 161 ldwm 4(%r1), %r14 162 ldwm 4(%r1), %r15 163 ldwm 4(%r1), %r16 164 ldwm 4(%r1), %r17 165 ldwm 4(%r1), %r18 166 167 /* let sigreturn finish for us */ 168 bl __sigreturn14, %rp 169 nop 170 botch 171 bl longjmperror, %rp 172 nop 173 EXIT(__longjmp14) 174 175 .end 176
Indexes created Mon Oct 20 20:10:13 GMT 2025