1f83b8f148
Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
98 lines
2.7 KiB
C
98 lines
2.7 KiB
C
/*
|
|
* arch/blackfin/kernel/flat.c
|
|
*
|
|
* Copyright (C) 2007 Analog Devices, Inc.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/flat.h>
|
|
|
|
#define FLAT_BFIN_RELOC_TYPE_16_BIT 0
|
|
#define FLAT_BFIN_RELOC_TYPE_16H_BIT 1
|
|
#define FLAT_BFIN_RELOC_TYPE_32_BIT 2
|
|
|
|
unsigned long bfin_get_addr_from_rp(unsigned long *ptr,
|
|
unsigned long relval,
|
|
unsigned long flags,
|
|
unsigned long *persistent)
|
|
{
|
|
unsigned short *usptr = (unsigned short *)ptr;
|
|
int type = (relval >> 26) & 7;
|
|
unsigned long val;
|
|
|
|
switch (type) {
|
|
case FLAT_BFIN_RELOC_TYPE_16_BIT:
|
|
case FLAT_BFIN_RELOC_TYPE_16H_BIT:
|
|
usptr = (unsigned short *)ptr;
|
|
pr_debug("*usptr = %x", get_unaligned(usptr));
|
|
val = get_unaligned(usptr);
|
|
val += *persistent;
|
|
break;
|
|
|
|
case FLAT_BFIN_RELOC_TYPE_32_BIT:
|
|
pr_debug("*ptr = %lx", get_unaligned(ptr));
|
|
val = get_unaligned(ptr);
|
|
break;
|
|
|
|
default:
|
|
pr_debug("BINFMT_FLAT: Unknown relocation type %x\n", type);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Stack-relative relocs contain the offset into the stack, we
|
|
* have to add the stack's start address here and return 1 from
|
|
* flat_addr_absolute to prevent the normal address calculations
|
|
*/
|
|
if (relval & (1 << 29))
|
|
return val + current->mm->context.end_brk;
|
|
|
|
if ((flags & FLAT_FLAG_GOTPIC) == 0)
|
|
val = htonl(val);
|
|
return val;
|
|
}
|
|
EXPORT_SYMBOL(bfin_get_addr_from_rp);
|
|
|
|
/*
|
|
* Insert the address ADDR into the symbol reference at RP;
|
|
* RELVAL is the raw relocation-table entry from which RP is derived
|
|
*/
|
|
void bfin_put_addr_at_rp(unsigned long *ptr, unsigned long addr,
|
|
unsigned long relval)
|
|
{
|
|
unsigned short *usptr = (unsigned short *)ptr;
|
|
int type = (relval >> 26) & 7;
|
|
|
|
switch (type) {
|
|
case FLAT_BFIN_RELOC_TYPE_16_BIT:
|
|
put_unaligned(addr, usptr);
|
|
pr_debug("new value %x at %p", get_unaligned(usptr), usptr);
|
|
break;
|
|
|
|
case FLAT_BFIN_RELOC_TYPE_16H_BIT:
|
|
put_unaligned(addr >> 16, usptr);
|
|
pr_debug("new value %x", get_unaligned(usptr));
|
|
break;
|
|
|
|
case FLAT_BFIN_RELOC_TYPE_32_BIT:
|
|
put_unaligned(addr, ptr);
|
|
pr_debug("new ptr =%lx", get_unaligned(ptr));
|
|
break;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(bfin_put_addr_at_rp);
|