setjmp.S revision 129202
1129202Scognet/* $NetBSD: setjmp.S,v 1.5 2003/04/05 23:08:51 bjh21 Exp $ */ 2129202Scognet 3129202Scognet/* 4129202Scognet * Copyright (c) 1997 Mark Brinicombe 5129202Scognet * All rights reserved. 6129202Scognet * 7129202Scognet * Redistribution and use in source and binary forms, with or without 8129202Scognet * modification, are permitted provided that the following conditions 9129202Scognet * are met: 10129202Scognet * 1. Redistributions of source code must retain the above copyright 11129202Scognet * notice, this list of conditions and the following disclaimer. 12129202Scognet * 2. Redistributions in binary form must reproduce the above copyright 13129202Scognet * notice, this list of conditions and the following disclaimer in the 14129202Scognet * documentation and/or other materials provided with the distribution. 15129202Scognet * 3. All advertising materials mentioning features or use of this software 16129202Scognet * must display the following acknowledgement: 17129202Scognet * This product includes software developed by Mark Brinicombe 18129202Scognet * 4. Neither the name of the University nor the names of its contributors 19129202Scognet * may be used to endorse or promote products derived from this software 20129202Scognet * without specific prior written permission. 21129202Scognet * 22129202Scognet * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 23129202Scognet * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24129202Scognet * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25129202Scognet * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 26129202Scognet * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27129202Scognet * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28129202Scognet * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29129202Scognet * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30129202Scognet * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31129202Scognet * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32129202Scognet * SUCH DAMAGE. 33129202Scognet */ 34129202Scognet 35129202Scognet#include <machine/asm.h> 36129202Scognet__FBSDID("$FreeBSD: head/lib/libc/arm/gen/setjmp.S 129202 2004-05-14 12:04:31Z cognet $"); 37129202Scognet/* 38129202Scognet * C library -- setjmp, longjmp 39129202Scognet * 40129202Scognet * longjmp(a,v) 41129202Scognet * will generate a "return(v)" from the last call to 42129202Scognet * setjmp(a) 43129202Scognet * by restoring registers from the stack. 44129202Scognet * The previous signal state is restored. 45129202Scognet */ 46129202Scognet 47129202Scognet#define SOFTFLOAT /* XXX */ 48129202ScognetENTRY(setjmp) 49129202Scognet /* Block all signals and retrieve the old signal mask */ 50129202Scognet stmfd sp!, {r0, r14} 51129202Scognet mov r0, #0x00000000 52129202Scognet 53129202Scognet bl PIC_SYM(_C_LABEL(sigblock), PLT) 54129202Scognet mov r1, r0 55129202Scognet 56129202Scognet ldmfd sp!, {r0, r14} 57129202Scognet 58129202Scognet /* Store signal mask */ 59129202Scognet str r1, [r0, #(25 * 4)] 60129202Scognet 61129202Scognet ldr r1, .Lsetjmp_magic 62129202Scognet str r1, [r0], #4 63129202Scognet 64129202Scognet#ifdef SOFTFLOAT 65129202Scognet add r0, r0, #52 66129202Scognet#else 67129202Scognet /* Store fp registers */ 68129202Scognet sfm f4, 4, [r0], #48 69129202Scognet /* Store fpsr */ 70129202Scognet rfs r1 71129202Scognet str r1, [r0], #0x0004 72129202Scognet#endif /*SOFTFLOAT*/ 73129202Scognet /* Store integer registers */ 74129202Scognet stmia r0, {r4-r14} 75129202Scognet mov r0, #0x00000000 76129202Scognet mov r15, r14 77129202Scognet 78129202Scognet.Lsetjmp_magic: 79129202Scognet .word _JB_MAGIC_SETJMP 80129202Scognet 81129202Scognet 82129202Scognet.weak _C_LABEL(longjmp) 83129202Scognet.set _C_LABEL(longjmp), _C_LABEL(__longjmp) 84129202ScognetENTRY(__longjmp) 85129202Scognet ldr r2, .Lsetjmp_magic 86129202Scognet ldr r3, [r0] 87129202Scognet teq r2, r3 88129202Scognet bne botch 89129202Scognet 90129202Scognet /* Fetch signal mask */ 91129202Scognet ldr r2, [r0, #(25 * 4)] 92129202Scognet 93129202Scognet /* Set signal mask */ 94129202Scognet stmfd sp!, {r0, r1, r14} 95129202Scognet sub sp, sp, #4 /* align the stack */ 96129202Scognet 97129202Scognet mov r0, r2 98129202Scognet bl PIC_SYM(_C_LABEL(sigsetmask), PLT) 99129202Scognet 100129202Scognet add sp, sp, #4 /* unalign the stack */ 101129202Scognet ldmfd sp!, {r0, r1, r14} 102129202Scognet 103129202Scognet add r0, r0, #4 104129202Scognet#ifdef SOFTFLOAT 105129202Scognet add r0, r0, #52 106129202Scognet#else 107129202Scognet /* Restore fp registers */ 108129202Scognet lfm f4, 4, [r0], #48 109129202Scognet /* Restore FPSR */ 110129202Scognet ldr r4, [r0], #0x0004 111129202Scognet wfs r4 112129202Scognet#endif /* SOFTFLOAT */ 113129202Scognet /* Restore integer registers */ 114129202Scognet ldmia r0, {r4-r14} 115129202Scognet 116129202Scognet /* Validate sp and r14 */ 117129202Scognet teq sp, #0 118129202Scognet teqne r14, #0 119129202Scognet beq botch 120129202Scognet 121129202Scognet /* Set return value */ 122129202Scognet 123129202Scognet mov r0, r1 124129202Scognet teq r0, #0x00000000 125129202Scognet moveq r0, #0x00000001 126129202Scognet mov r15, r14 127129202Scognet 128129202Scognet /* validation failed, die die die. */ 129129202Scognetbotch: 130129202Scognet bl PIC_SYM(_C_LABEL(longjmperror), PLT) 131129202Scognet bl PIC_SYM(_C_LABEL(abort), PLT) 132129202Scognet b . - 8 /* Cannot get here */ 133