/* $NetBSD: setjmp.S,v 1.14 2013/04/19 13:45:45 matt 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.
*/
#if !defined(__SOFTFP__) && !defined(__VFP_FP__) && !defined(__ARM_PCS)
#error FPA is not supported anymore
#endif
.fpu vfp
#include <machine/asm.h>
#include <machine/setjmp.h>
__FBSDID("$FreeBSD$");
/*
* 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}
add r2, r0, #(_JB_SIGMASK * 4) /* oset */
mov r1, #0x00000000 /* set */
mov r0, #0x00000001 /* SIG_BLOCK */
bl PIC_SYM(_C_LABEL(sigprocmask), PLT)
ldmfd sp!, {r0, r14}
ldr r1, .Lsetjmp_magic
#if __ARM_ARCH >= 6
add r2, r0, #(_JB_REG_D8 * 4)
vstmia r2, {d8-d15}
vmrs r2, fpscr
str r2, [r0, #(_JB_REG_FPSCR * 4)]
#endif
str r1, [r0] /* store magic */
/* Store integer registers */
add r0, r0, #(_JB_REG_R4 * 4)
#ifndef __thumb__
stmia r0, {r4-r14}
#else
stmia r0, {r4-r12}
str r13, [r0, #((_JB_REG_R13 - _JB_REG_R4) * 4)]
str r14, [r0, #((_JB_REG_R14 - _JB_REG_R4) * 4)]
#endif
mov r0, #0x00000000
RET
.Lsetjmp_magic:
.word _JB_MAGIC_SETJMP
END(setjmp)
.weak _C_LABEL(longjmp)
.set _C_LABEL(longjmp), _C_LABEL(__longjmp)
ENTRY(__longjmp)
ldr r2, [r0]
ldr ip, .Lsetjmp_magic
teq r2, ip
bne .Lbotch
/* Restore the signal mask. */
stmfd sp!, {r0-r2, r14}
mov r2, #0x00000000
add r1, r0, #(_JB_SIGMASK * 4) /* Signal mask */
mov r0, #3 /* SIG_SETMASK */
bl PIC_SYM(_C_LABEL(sigprocmask), PLT)
ldmfd sp!, {r0-r2, r14}
#if __ARM_ARCH >= 6
add ip, r0, #(_JB_REG_D8 * 4)
vldmia ip, {d8-d15}
ldr ip, [r0, #(_JB_REG_FPSCR * 4)]
vmsr fpscr, ip
#endif
add r0, r0, #(_JB_REG_R4 * 4)
/* Restore integer registers */
#ifndef __thumb__
ldmia r0, {r4-r14}
#else
ldmia r0, {r4-r12}
ldr r13, [r0, #((_JB_REG_R13 - _JB_REG_R4) * 4)]
ldr r14, [r0, #((_JB_REG_R14 - _JB_REG_R4) * 4)]
#endif
/* Validate sp and r14 */
teq sp, #0
it ne
teqne r14, #0
it eq
beq .Lbotch
/* Set return value */
movs r0, r1
it eq
moveq r0, #0x00000001
RET
/* validation failed, die die die. */
.Lbotch:
bl PIC_SYM(_C_LABEL(longjmperror), PLT)
bl PIC_SYM(_C_LABEL(abort), PLT)
1: b 1b /* Cannot get here */
END(__longjmp)
.section .note.GNU-stack,"",%progbits