1/* $NetBSD: compat_sigsetjmp.S,v 1.3 2013/11/30 20:54:14 joerg Exp $ */ 2 3/* 4 * Copyright (c) 1997 Mark Brinicombe 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Mark Brinicombe 18 * 4. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35#include <machine/asm.h> 36#include <machine/setjmp.h> 37 38/* 39 * C library -- sigsetjmp, siglongjmp 40 * 41 * longjmp(a,v) 42 * will generate a "return(v)" from the last call to 43 * setjmp(a, m) 44 * by restoring registers from the stack. 45 * The previous signal state is restored. 46 */ 47 48ENTRY(sigsetjmp) 49#if defined(__thumb__) && defined(_ARM_ARCH_T2) 50 cbnz r1, 1f 51 b PLT_SYM(_C_LABEL(_setjmp)) 521: b PLT_SYM(_C_LABEL(setjmp)) 53#elif !defined(__thumb__) 54 cmp r1, #0 55 beq PLT_SYM(_C_LABEL(_setjmp)) 56 b PLT_SYM(_C_LABEL(setjmp)) 57#else 58 push {r3, lr} 59 beq 1f 60 bl PLT_SYM(_C_LABEL(setjmp)) 61 pop {r3, pc} 621: bl PLT_SYM(_C_LABEL(_setjmp)) 63 pop {r3, pc} 64#endif 65END(sigsetjmp) 66 67ENTRY(siglongjmp) 68 ldr r2, .L_setjmp_magic 69 ldr r3, [r0] 70 cmp r2, r3 71#if !defined(__thumb__) || defined(_ARM_ARCH_T2) 72#if defined(__thumb__) 73 it eq 74#endif 75 beq PLT_SYM(_C_LABEL(_longjmp)) 76 b PLT_SYM(_C_LABEL(longjmp)) 77#else 78 push {lr} 79 sub sp, sp, #4 80 beq 1f 81 bl PIC_SYM(_C_LABEL(longjmp), PLT) 82 b 2f 831: bl PIC_SYM(_C_LABEL(_longjmp), PLT) 842: add sp, sp, #4 85 pop {pc} 86#endif 87 88 .align 0 89.L_setjmp_magic: 90 .word _JB_MAGIC__SETJMP 91END(siglongjmp) 92