121 lines
3.5 KiB
ArmAsm
121 lines
3.5 KiB
ArmAsm
/* $NetBSD: setjmp.S,v 1.5 2003/04/05 23:08:51 bjh21 Exp $ */
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/*
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* Copyright (c) 1997 Mark Brinicombe
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Mark Brinicombe
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/* needed parts from <machine/asm.h> */
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#define __FBSDID(x)
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#define ENTRY(x) .text; .align 0; .globl x; .type x,#function; x:;
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#define WEAK_ALIAS(x,y)
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#define RET mov pc, lr
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#define _JB_MAGIC__SETJMP 0x4278f500
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#define __SOFTFP__ 1
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#define _STANDALONE
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/* end of <machine/asm.h> */
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__FBSDID("$FreeBSD: release/8.2.0/lib/libc/arm/gen/setjmp.S 193145 2009-05-31 02:03:40Z marcel $");
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/*
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* C library -- setjmp, longjmp
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*
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* longjmp(a,v)
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* will generate a "return(v)" from the last call to
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* setjmp(a)
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* by restoring registers from the stack.
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* The previous signal state is NOT restored.
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*
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* Note: r0 is the return value
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* r1-r3 are scratch registers in functions
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*/
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ENTRY(setjmp)
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ldr r1, .Lsetjmp_magic
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str r1, [r0], #4
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#ifdef __SOFTFP__
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add r0, r0, #52
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#else
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/* Store fp registers */
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sfm f4, 4, [r0], #48
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/* Store fpsr */
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rfs r1
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str r1, [r0], #0x0004
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#endif /* __SOFTFP__ */
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/* Store integer registers */
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stmia r0, {r4-r14}
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mov r0, #0x00000000
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RET
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.Lsetjmp_magic:
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.word _JB_MAGIC__SETJMP
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WEAK_ALIAS(__longjmp, longjmp)
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ENTRY(longjmp)
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ldr r2, .Lsetjmp_magic
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ldr r3, [r0], #4
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teq r2, r3
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bne botch
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#ifdef __SOFTFP__
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add r0, r0, #52
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#else
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/* Restore fp registers */
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lfm f4, 4, [r0], #48
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/* Restore fpsr */
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ldr r4, [r0], #0x0004
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wfs r4
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#endif /* __SOFTFP__ */
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/* Restore integer registers */
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ldmia r0, {r4-r14}
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/* Validate sp and r14 */
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teq sp, #0
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teqne r14, #0
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beq botch
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/* Set return value */
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mov r0, r1
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teq r0, #0x00000000
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moveq r0, #0x00000001
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RET
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/* validation failed, die die die. */
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botch:
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#if !defined(_STANDALONE)
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bl PIC_SYM(_C_LABEL(longjmperror), PLT)
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bl PIC_SYM(_C_LABEL(abort), PLT)
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b . - 8 /* Cannot get here */
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#else
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b .
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#endif
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