1178580Simp/* $NetBSD: setjmp.S,v 1.17 2005/09/17 11:49:39 tsutsui Exp $ */ 2178580Simp 3178580Simp/*- 4178580Simp * Copyright (c) 1991, 1993 5178580Simp * The Regents of the University of California. All rights reserved. 6178580Simp * 7178580Simp * This code is derived from software contributed to Berkeley by 8178580Simp * Ralph Campbell. 9178580Simp * 10178580Simp * Redistribution and use in source and binary forms, with or without 11178580Simp * modification, are permitted provided that the following conditions 12178580Simp * are met: 13178580Simp * 1. Redistributions of source code must retain the above copyright 14178580Simp * notice, this list of conditions and the following disclaimer. 15178580Simp * 2. Redistributions in binary form must reproduce the above copyright 16178580Simp * notice, this list of conditions and the following disclaimer in the 17178580Simp * documentation and/or other materials provided with the distribution. 18178580Simp * 3. Neither the name of the University nor the names of its contributors 19178580Simp * may be used to endorse or promote products derived from this software 20178580Simp * without specific prior written permission. 21178580Simp * 22178580Simp * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23178580Simp * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24178580Simp * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25178580Simp * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26178580Simp * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27178580Simp * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28178580Simp * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29178580Simp * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30178580Simp * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31178580Simp * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32178580Simp * SUCH DAMAGE. 33178580Simp */ 34178580Simp 35178580Simp#include <machine/asm.h> 36178580Simp__FBSDID("$FreeBSD$"); 37178580Simp#include <machine/regnum.h> 38178580Simp 39178580Simp#if defined(LIBC_SCCS) && !defined(lint) 40178580Simp ASMSTR("from: @(#)setjmp.s 8.1 (Berkeley) 6/4/93") 41178580Simp ASMSTR("$NetBSD: setjmp.S,v 1.17 2005/09/17 11:49:39 tsutsui Exp $") 42178580Simp#endif /* LIBC_SCCS and not lint */ 43178580Simp 44209231Sjchandra#include "SYS.h" 45209231Sjchandra 46178580Simp#ifdef __ABICALLS__ 47178580Simp .abicalls 48178580Simp#endif 49178580Simp 50178580Simp/* 51178580Simp * C library -- setjmp, longjmp 52178580Simp * 53178580Simp * longjmp(a,v) 54178580Simp * will generate a "return(v)" from 55178580Simp * the last call to 56178580Simp * setjmp(a) 57178580Simp * by restoring registers from the stack, 58178580Simp * and a struct sigcontext, see <signal.h> 59178580Simp */ 60178580Simp 61178580Simp#define SETJMP_FRAME_SIZE (CALLFRAME_SIZ + (SZREG * 2)) 62178580Simp 63178580Simp 64178580SimpNESTED(setjmp, SETJMP_FRAME_SIZE, ra) 65178580Simp .mask 0x80000000, (CALLFRAME_RA - CALLFRAME_SIZ) 66209231Sjchandra SETUP_GP 67209231Sjchandra PTR_SUBU sp, sp, SETJMP_FRAME_SIZE # allocate stack frame 68209231Sjchandra SAVE_GP(CALLFRAME_GP) 69209231Sjchandra SETUP_GP64(CALLFRAME_GP, setjmp) 70178580Simp 71209231Sjchandra REG_S ra, CALLFRAME_RA(sp) # save RA 72209231Sjchandra REG_S a0, CALLFRAME_SIZ(sp) # store env 73209231Sjchandra 74178580Simp /* Get the signal mask. */ 75209231Sjchandra PTR_ADDU a2, a0, _JB_SIGMASK * SZREG # &oenv 76178580Simp li a0, 1 # SIG_SETBLOCK 77178580Simp move a1, zero # &env == 0 78209231Sjchandra PTR_LA t9, _C_LABEL(sigprocmask) # get current signal mask 79209231Sjchandra jalr t9 80178580Simp 81209231Sjchandra RESTORE_GP64 82209231Sjchandra REG_L a0, CALLFRAME_SIZ(sp) # restore env pointer 83209231Sjchandra REG_L ra, CALLFRAME_RA(sp) # restore RA 84209231Sjchandra PTR_ADDU sp, sp, SETJMP_FRAME_SIZE # pop stack frame 85178580Simp 86209231Sjchandra REG_LI v0, _JB_MAGIC_SETJMP 87209231Sjchandra REG_S v0, (_JB_MAGIC * SZREG)(a0) 88209231Sjchandra REG_S ra, (_JB_REG_RA * SZREG)(a0) 89209231Sjchandra REG_S s0, (_JB_REG_S0 * SZREG)(a0) 90209231Sjchandra REG_S s1, (_JB_REG_S1 * SZREG)(a0) 91209231Sjchandra REG_S s2, (_JB_REG_S2 * SZREG)(a0) 92209231Sjchandra REG_S s3, (_JB_REG_S3 * SZREG)(a0) 93209231Sjchandra REG_S s4, (_JB_REG_S4 * SZREG)(a0) 94209231Sjchandra REG_S s5, (_JB_REG_S5 * SZREG)(a0) 95209231Sjchandra REG_S s6, (_JB_REG_S6 * SZREG)(a0) 96209231Sjchandra REG_S s7, (_JB_REG_S7 * SZREG)(a0) 97209231Sjchandra REG_S sp, (_JB_REG_SP * SZREG)(a0) 98209231Sjchandra REG_S s8, (_JB_REG_S8 * SZREG)(a0) 99209231Sjchandra#if defined(__mips_n32) || defined(__mips_n64) 100209231Sjchandra REG_S gp, (_JB_REG_GP * SZREG)(a0) 101209231Sjchandra#endif 102178580Simp 103178580Simp move v0, zero 104209231Sjchandra jr ra 105178580SimpEND(setjmp) 106178580Simp 107178580Simp#define LONGJMP_FRAME_SIZE (CALLFRAME_SIZ + (SZREG * 2)) 108178580Simp 109178580SimpNESTED(longjmp, LONGJMP_FRAME_SIZE, ra) 110178580Simp .mask 0x80000000, (CALLFRAME_RA - CALLFRAME_SIZ) 111209231Sjchandra PIC_PROLOGUE(longjmp) 112209231Sjchandra PTR_SUBU sp, sp, LONGJMP_FRAME_SIZE # allocate stack frame 113209231Sjchandra SAVE_GP(CALLFRAME_GP) 114209231Sjchandra 115209231Sjchandra REG_S ra, CALLFRAME_RA(sp) # save RA 116209231Sjchandra REG_L v0, (_JB_MAGIC * SZREG)(a0) 117209231Sjchandra REG_LI t0, _JB_MAGIC_SETJMP 118178580Simp bne v0, t0, botch # jump if error 119178580Simp nop 120178580Simp 121209231Sjchandra REG_S a0, CALLFRAME_SIZ(sp) # save env 122209231Sjchandra REG_S a1, (CALLFRAME_SIZ + SZREG)(sp) # save return value 123178580Simp 124178580Simp # set sigmask 125209231Sjchandra PTR_ADDU a1, a0, _JB_SIGMASK * SZREG # &set 126178580Simp move a2, zero # &oset == NULL 127178580Simp li a0, 3 # SIG_SETMASK 128209231Sjchandra PTR_LA t9,_C_LABEL(sigprocmask) # set current signal mask 129178580Simp jal t9 130178580Simp nop 131178580Simp 132209231Sjchandra REG_L a0, CALLFRAME_SIZ(sp) # restore env 133209231Sjchandra REG_L a1, (CALLFRAME_SIZ + SZREG)(sp) # restore return value 134178580Simp 135209231Sjchandra REG_L ra, (_JB_REG_RA * SZREG)(a0) 136209231Sjchandra REG_L s0, (_JB_REG_S0 * SZREG)(a0) 137209231Sjchandra REG_L s1, (_JB_REG_S1 * SZREG)(a0) 138209231Sjchandra REG_L s2, (_JB_REG_S2 * SZREG)(a0) 139209231Sjchandra REG_L s3, (_JB_REG_S3 * SZREG)(a0) 140209231Sjchandra REG_L s4, (_JB_REG_S4 * SZREG)(a0) 141209231Sjchandra REG_L s5, (_JB_REG_S5 * SZREG)(a0) 142209231Sjchandra REG_L s6, (_JB_REG_S6 * SZREG)(a0) 143209231Sjchandra REG_L s7, (_JB_REG_S7 * SZREG)(a0) 144209231Sjchandra REG_L sp, (_JB_REG_SP * SZREG)(a0) 145209231Sjchandra REG_L s8, (_JB_REG_S8 * SZREG)(a0) 146209231Sjchandra#if defined(__mips_n32) || defined(__mips_n64) 147209231Sjchandra REG_L gp, (_JB_REG_GP * SZREG)(a0) 148209231Sjchandra#endif 149209231Sjchandra 150178580Simp move v0, a1 151178580Simp j ra 152178580Simp nop 153178580Simp 154178580Simpbotch: 155209231Sjchandra /* 156209231Sjchandra * We know we aren't returning so we don't care about restoring 157209231Sjchandra * our caller's GP. 158209231Sjchandra */ 159209231Sjchandra PTR_LA t9, _C_LABEL(longjmperror) 160209231Sjchandra jalr t9 161178580Simp nop 162178580Simp 163209231Sjchandra PIC_TAILCALL(abort) 164178580SimpEND(longjmp) 165