1/* $NetBSD: setjmp.S,v 1.8 2005/10/16 17:26:24 christos 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 -- setjmp, longjmp 40 * 41 * longjmp(a,v) 42 * will generate a "return(v)" from the last call to 43 * setjmp(a) 44 * by restoring registers from the stack. 45 * The previous signal state is restored. 46 */ 47 48ENTRY(__setjmp14) 49 /* Get the signal mask. */ 50 stmfd sp!, {r0-r2, r14} 51 add r2, r0, #(_JB_SIGMASK * 4) 52 mov r1, #0x00000000 53 mov r0, #0x00000000 54 bl PIC_SYM(_C_LABEL(__sigprocmask14), PLT) 55 ldmfd sp!, {r0-r2, r14} 56 57 ldr r1, .Lsetjmp_magic 58 str r1, [r0], #4 59 60#ifdef SOFTFLOAT 61 add r0, r0, #52 62#else 63 /* Store fp registers */ 64 sfm f4, 4, [r0], #48 65 /* Store fpsr */ 66 rfs r1 67 str r1, [r0], #0x0004 68#endif /*SOFTFLOAT*/ 69 /* Store integer registers */ 70 stmia r0, {r4-r14} 71 mov r0, #0x00000000 72 RET 73 74.Lsetjmp_magic: 75 .word _JB_MAGIC_SETJMP 76 77 78ENTRY(__longjmp14) 79 ldr r2, .Lsetjmp_magic 80 ldr r3, [r0] 81 teq r2, r3 82 bne .Lbotch 83 84 /* Restore the signal mask. */ 85 stmfd sp!, {r0-r2, r14} 86 mov r2, #0x00000000 87 add r1, r0, #(_JB_SIGMASK * 4) 88 mov r0, #3 /* SIG_SETMASK */ 89 bl PIC_SYM(_C_LABEL(__sigprocmask14), PLT) 90 ldmfd sp!, {r0-r2, r14} 91 92 add r0, r0, #4 93#ifdef SOFTFLOAT 94 add r0, r0, #52 95#else 96 /* Restore fp registers */ 97 lfm f4, 4, [r0], #48 98 /* Restore FPSR */ 99 ldr r4, [r0], #0x0004 100 wfs r4 101#endif /* SOFTFLOAT */ 102 /* Restore integer registers */ 103 ldmia r0, {r4-r14} 104 105 /* Validate sp and r14 */ 106 teq sp, #0 107 teqne r14, #0 108 beq .Lbotch 109 110 /* Set return value */ 111 112 mov r0, r1 113 teq r0, #0x00000000 114 moveq r0, #0x00000001 115 RET 116 117 /* validation failed, die die die. */ 118.Lbotch: 119 bl PIC_SYM(_C_LABEL(longjmperror), PLT) 120 bl PIC_SYM(_C_LABEL(abort), PLT) 121 b . - 8 /* Cannot get here */ 122