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parisc/unaligned: Fix ldw() and stw() unalignment handlers 

commit a97279836867b1cb50a3d4f0b1bf60e0abe6d46c upstream.

Fix 3 bugs:

a) emulate_stw() doesn't return the error code value, so faulting
instructions are not reported and aborted.

b) Tell emulate_ldw() to handle fldw_l as floating point instruction

c) Tell emulate_ldw() to handle ldw_m as integer instruction

Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Helge Deller 2022-02-18 23:40:14 +01:00 committed by Greg Kroah-Hartman
parent bf0b3d61e0
commit 759e5dc655
1 changed files with 3 additions and 3 deletions
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6
arch/parisc/kernel/unaligned.c
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@ -340,7 +340,7 @@ static int emulate_stw(struct pt_regs *regs, int frreg, int flop)
: "r" (val), "r" (regs->ior), "r" (regs->isr)
: "r19", "r20", "r21", "r22", "r1", FIXUP_BRANCH_CLOBBER );
return 0;
return ret;
}
static int emulate_std(struct pt_regs *regs, int frreg, int flop)
{
@ -619,10 +619,10 @@ void handle_unaligned(struct pt_regs *regs)
{
case OPCODE_FLDW_L:
flop=1;
ret = emulate_ldw(regs, R2(regs->iir),0);
ret = emulate_ldw(regs, R2(regs->iir), 1);
break;
case OPCODE_LDW_M:
ret = emulate_ldw(regs, R2(regs->iir),1);
ret = emulate_ldw(regs, R2(regs->iir), 0);
break;
case OPCODE_FSTW_L: