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/*
* Copyright (c) Olivier Houchard
* 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. Neither the name of the author 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: src/lib/libkse/arch/arm/arm/context.S,v 1.4.8.1 2009/04/15 03:14:26 kensmith Exp $");
/*
* int thr_setcontext(mcontext_t *mcp, intptr_t val, intptr_t *loc)
*
* Restores the context in mcp.
*
* Returns 0 if there are no errors; -1 otherwise
*/
.weak _C_LABEL(_thr_setcontext)
.set _C_LABEL(_thr_setcontext), _C_LABEL(__thr_setcontext)
ENTRY(__thr_setcontext)
/* Check for NULL pointer. */
cmp r0, #0
moveq r0, #-1
moveq pc, lr
cmp r2, #0
strne r1, [r2]
ldr r1, [r0, #(16 * 4)] /* CPSR */
msr cpsr, r1
ldmia r0, {r0-r15}
mov pc, lr
/* XXX: FP bits ? */
/*
* int thr_getcontext(mcontext_t *mcp);
*
* Returns -1 if there is an error, 0 no errors; 1 upon return
* from a setcontext().
*/
.weak _C_LABEL(_thr_getcontext)
.set _C_LABEL(_thr_getcontext), _C_LABEL(__thr_getcontext)
ENTRY(__thr_getcontext)
/* Check for NULL pointer. */
cmp r0, #0
moveq r0, #-1
moveq pc, lr
stmia r0, {r1-r14}
mov r1, #1
str r1, [r0] /* Return 1 from setcontext */
str lr, [r0, #(15 * 4)] /* PC */
mrs r1, cpsr
str r1, [r0, #(16 * 4)] /* CPSR */
mov r0, #0 /* Return 0. */
mov pc, lr
ENTRY(_arm_enter_uts)
add sp, r2, r3 /* Stack addr + size. */
mov pc, r1
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