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| author | George G. Davis <davis_g@mvista.com> | 2005-10-10 10:17:44 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2005-10-10 10:17:44 +0100 |
| commit | 19da83f632d235fff9f94671d2e2cf87d27a2446 (patch) | |
| tree | 7c5935b9c88497367c7da4b373c98180cafd9a2b | |
| parent | 79d13b62ef9da84d3ba551caac42d6107e57208f (diff) | |
| download | linux-19da83f632d235fff9f94671d2e2cf87d27a2446.tar.gz linux-19da83f632d235fff9f94671d2e2cf87d27a2446.tar.bz2 linux-19da83f632d235fff9f94671d2e2cf87d27a2446.zip | |
[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>
| -rw-r--r-- | arch/arm/mm/alignment.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/arch/arm/mm/alignment.c b/arch/arm/mm/alignment.c index 4b39d867ac14..f35e69e9c65c 100644 --- a/arch/arm/mm/alignment.c +++ b/arch/arm/mm/alignment.c @@ -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. |