1/* $NetBSD: __setjmp14.S,v 1.6 2016/07/16 09:51:13 skrll 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 * 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/* XXX fredette - this is awful */ 34#define _LOCORE 35#include <machine/frame.h> 36#undef _LOCORE 37#include <machine/psl.h> 38 39#if defined(LIBC_SCCS) && !defined(lint) 40 RCSID("$NetBSD: __setjmp14.S,v 1.6 2016/07/16 09:51:13 skrll Exp $") 41#endif /* LIBC_SCCS and not lint */ 42 43/* 44 * C library -- setjmp, longjmp 45 * 46 * longjmp(a,v) 47 * will generate a "return(v)" from 48 * the last call to 49 * setjmp(a) 50 * by restoring registers from the stack, 51 * and a struct sigcontext, see <signal.h> 52 */ 53 54ENTRY(__setjmp14,0) 55 /* Finish our stack frame. */ 56 stw %rp, HPPA_FRAME_CRP(%sp) 57 stw %arg0, HPPA_FRAME_ARG(0)(%sp) 58 59 /* A sigcontext is at the beginning of our jmp_buf. */ 60 stw %r0, 4(%arg0) ; unused word (old style signal mask) 61 stw %sp, 8(%arg0) ; sc.sc_sp = %sp 62 stw %r0, 16(%arg0) ; sc.sc_ap = NULL 63 mfsp %sr0, %r1 64 stw %r1, 20(%arg0) ; sc.sc_pcsqh = %sr0 65 stw %rp, 24(%arg0) ; sc.sc_pcoqh = %rp 66 stw %r1, 28(%arg0) ; sc.sc_pcsqh = %sr0 67 ldo 4(%rp), %r1 68 stw %r1, 32(%arg0) ; sc.sc_pcoqt = %rp + 4 69 ldil L%PSW_MBS, %r1 70 ldo R%PSW_MBS(%r1), %r1 71 stw %r1, 36(%arg0) ; set sc.sc_ps 72 73 /* We store all callee-saved registers after the sigcontext. */ 74 ldo 56(%arg0), %r1 75 stwm %r3, 4(%r1) 76 stwm %r4, 4(%r1) 77 stwm %r5, 4(%r1) 78 stwm %r6, 4(%r1) 79 stwm %r7, 4(%r1) 80 stwm %r8, 4(%r1) 81 stwm %r9, 4(%r1) 82 stwm %r10, 4(%r1) 83 stwm %r11, 4(%r1) 84 stwm %r12, 4(%r1) 85 stwm %r13, 4(%r1) 86 stwm %r14, 4(%r1) 87 stwm %r15, 4(%r1) 88 stwm %r16, 4(%r1) 89 stwm %r17, 4(%r1) 90 stwm %r18, 4(%r1) 91 92 /* 93 * Start the stack frame for the calls we will make. 94 * The minimum frame is 48 bytes, but the stack must 95 * always be 64-byte aligned; we use the top 4 bytes 96 * to save our caller's %r3, and the following 12 bytes 97 * as the stack_t for our sigaltstack call. 98 * XXX - this assumes that sizeof(stack_t) <= 12 99 */ 100 copy %r3, %r1 101 copy %sp, %r3 102 stwm %r1, HPPA_FRAME_SIZE(%sp) 103 104 /* Get signal stack info. */ 105 ldo 4(%r3), %arg1 ; set up oss 106 bl __sigaltstack14, %rp 107 copy %r0, %arg0 ; set up ss 108 109 /* Recover our jmp_buf and extract SS_ONSTACK */ 110 ldw HPPA_FRAME_ARG(0)(%r3), %arg0 111 ldw 12(%r3), %r1 ; get ss_flags 112 ldi 1, %r20 ; SS_ONSTACK 113 and %r1, %r20, %r1 114 stw %r1, 0(%arg0) ; sc.sc_onstack 115 116 /* Get the signal mask. */ 117 ldo 40(%arg0), %arg2 ; oset = &sc.sc_mask 118 copy %r0, %arg1 ; set = NULL 119 bl __sigprocmask14, %rp 120 copy %r0, %arg0 ; action = 0 <ignored> 121 122 /* Return 0. */ 123 ldo HPPA_FRAME_SIZE(%r3),%sp 124 ldwm -HPPA_FRAME_SIZE(%sp),%r3 125 ldw HPPA_FRAME_CRP(%sp), %rp 126 bv %r0(%rp) 127 copy %r0, %ret0 128EXIT(__setjmp14) 129 130 .end 131