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[ARM] 2959/1: Add test for invalid LDRD/STRD Rd cases in ARM alignment handler 

Patch from George G. Davis

Add test for invalid LDRD/STRD Rd cases in ARM alignment handler
and restore SWP printk KERN_ERR.

Signed-off-by: Steve Longerbeam <slongerbeam@mvista.com>
Signed-off-by: George G. Davis <gdavis@mvista.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
hifive-unleashed-5.1
George G. Davis 2005-10-10 10:17:44 +01:00 committed by Russell King
parent 79d13b62ef
commit 19da83f632
1 changed files with 10 additions and 1 deletions
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11
arch/arm/mm/alignment.c
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@ -330,6 +330,9 @@ do_alignment_ldrdstrd(unsigned long addr, unsigned long instr,
{
unsigned int rd = RD_BITS(instr);
if (((rd & 1) == 1) || (rd == 14))
goto bad;
ai_dword += 1;
if (user_mode(regs))
@ -361,7 +364,8 @@ do_alignment_ldrdstrd(unsigned long addr, unsigned long instr,
}
return TYPE_LDST;
bad:
return TYPE_ERROR;
fault:
return TYPE_FAULT;
}
@ -663,6 +667,8 @@ do_alignment(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
else if ((instr & 0x001000f0) == 0x000000d0 || /* LDRD */
(instr & 0x001000f0) == 0x000000f0) /* STRD */
handler = do_alignment_ldrdstrd;
else if ((instr & 0x01f00ff0) == 0x01000090) /* SWP */
goto swp;
else
goto bad;
break;
@ -733,6 +739,9 @@ do_alignment(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
do_bad_area(current, current->mm, addr, fsr, regs);
return 0;
swp:
printk(KERN_ERR "Alignment trap: not handling swp instruction\n");
bad:
/*
* Oops, we didn't handle the instruction.