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

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commit a972798368 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 397b5433f7
commit 646b532f32
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) : "r" (val), "r" (regs->ior), "r" (regs->isr)
: "r19", "r20", "r21", "r22", "r1", FIXUP_BRANCH_CLOBBER ); : "r19", "r20", "r21", "r22", "r1", FIXUP_BRANCH_CLOBBER );
return 0; return ret;
} }
static int emulate_std(struct pt_regs *regs, int frreg, int flop) 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: case OPCODE_FLDW_L:
flop=1; flop=1;
ret = emulate_ldw(regs, R2(regs->iir),0); ret = emulate_ldw(regs, R2(regs->iir), 1);
break; break;
case OPCODE_LDW_M: case OPCODE_LDW_M:
ret = emulate_ldw(regs, R2(regs->iir),1); ret = emulate_ldw(regs, R2(regs->iir), 0);
break; break;
case OPCODE_FSTW_L: case OPCODE_FSTW_L: