107 lines
3.1 KiB
ArmAsm
107 lines
3.1 KiB
ArmAsm
/* $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>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#define SOFTFLOAT /* XXX */
|
|
/*
|
|
* 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 NOT restored.
|
|
*
|
|
* Note: r0 is the return value
|
|
* r1-r3 are scratch registers in functions
|
|
*/
|
|
|
|
ENTRY(_setjmp)
|
|
ldr r1, .L_setjmp_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
|
|
|
|
.L_setjmp_magic:
|
|
.word _JB_MAGIC__SETJMP
|
|
|
|
ENTRY(_longjmp)
|
|
ldr r2, .L_setjmp_magic
|
|
ldr r3, [r0], #4
|
|
teq r2, r3
|
|
bne botch
|
|
|
|
#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
|
|
mov r15, r14
|
|
|
|
/* 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 */
|