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/*
* stack_profile.c
*
* Copyright(c) 1998 - 2009 Texas Instruments. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name Texas Instruments 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 COPYRIGHT HOLDERS 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 COPYRIGHT
* OWNER 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.
*/
/*
* src/stack_profile.c
*
*/
#include <linux/stddef.h>
unsigned long check_stack(unsigned long *base)
{
register unsigned long sp asm ("sp");
unsigned long retval = sp;
*base = ((sp & ~0x1fff) + 0x380);
return retval;
}
unsigned long check_stack_start(unsigned long *base)
{
unsigned long i;
unsigned long from,to;
to = check_stack(&from);
*base = from;
/* run from the stack pointer down to the base */
for (i = from;i<to;i+=4)
{
/* fill up the pattern */
*(long *)i = 0xdeadbeef;
}
/* printk("check_stack_start: from =%x to=%x data=%x\n",from,to,*(long *)(from+4));*/
return to;
}
unsigned long check_stack_stop(unsigned long *base)
{
unsigned long i;
unsigned long from,to;
to = check_stack(&from);
*base = from;
/* run from the stack pointer down to the base */
for (i = from;i<to;i+=4)
{
/* check up the pattern */
if ((*(long *)i) != 0xdeadbeef)
break;
}
/*printk("check_stack_stop: from =%x to=%x data=%x data=%x i=0x%x\n",from,to,*(long *)from,*(long *)(from+4),i);*/
/* return the first time when the pattern doesn't match */
return i;
}
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