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/* $NetBSD: setjmp.S,v 1.5 2003/04/05 23:08:51 bjh21 Exp $ */
/*
* Copyright (c) 1997 Mark Brinicombe
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Mark Brinicombe
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <machine/asm.h>
#include <machine/setjmp.h>
/*
* C library -- setjmp, longjmp
*
* longjmp(a,v)
* will generate a "return(v)" from the last call to
* setjmp(a)
* by restoring registers from the stack.
* The previous signal state is restored.
*/
ENTRY(setjmp)
/* Block all signals and retrieve the old signal mask */
stmfd sp!, {r0, r14}
mov r0, #0x00000000
bl PIC_SYM(_C_LABEL(sigblock), PLT)
mov r1, r0
ldmfd sp!, {r0, r14}
/* Store signal mask */
str r1, [r0, #(25 * 4)]
ldr r1, .Lsetjmp_magic
str r1, [r0], #4
#ifdef SOFTFLOAT
add r0, r0, #52
#else
/* Store fp registers */
sfm f4, 4, [r0], #48
/* Store fpsr */
rfs r1
str r1, [r0], #0x0004
#endif /*SOFTFLOAT*/
/* Store integer registers */
stmia r0, {r4-r14}
mov r0, #0x00000000
mov r15, r14
.Lsetjmp_magic:
.word _JB_MAGIC_SETJMP
ENTRY(longjmp)
ldr r2, .Lsetjmp_magic
ldr r3, [r0]
teq r2, r3
bne botch
/* Fetch signal mask */
ldr r2, [r0, #(25 * 4)]
/* Set signal mask */
stmfd sp!, {r0, r1, r14}
sub sp, sp, #4 /* align the stack */
mov r0, r2
bl PIC_SYM(_C_LABEL(sigsetmask), PLT)
add sp, sp, #4 /* unalign the stack */
ldmfd sp!, {r0, r1, r14}
add r0, r0, #4
#ifdef SOFTFLOAT
add r0, r0, #52
#else
/* Restore fp registers */
lfm f4, 4, [r0], #48
/* Restore FPSR */
ldr r4, [r0], #0x0004
wfs r4
#endif /* SOFTFLOAT */
/* Restore integer registers */
ldmia r0, {r4-r14}
/* Validate sp and r14 */
teq sp, #0
teqne r14, #0
beq botch
/* Set return value */
mov r0, r1
teq r0, #0x00000000
moveq r0, #0x00000001
#ifdef __ARM_26__
mov r15, r14
#else
mov r15, r14
#endif
/* validation failed, die die die. */
botch:
bl PIC_SYM(_C_LABEL(longjmperror), PLT)
bl PIC_SYM(_C_LABEL(abort), PLT)
b . - 8 /* Cannot get here */
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