If an address error exception occurs for a LDXC1 or SDXC1 instruction,
within the cop1x opcode space, allow it to be passed through to the FPU
emulator rather than resulting in a SIGILL. This causes LDXC1 & SDXC1 to
be handled in a manner consistent with the more common LDC1 & SDC1
instructions.
Signed-off-by: Paul Burton <paul.burton@xxxxxxxxxx>
Cc: Aurelien Jarno <aurelien@xxxxxxxxxxx>
---
Hi Aurelien,
Thanks for tracking that down. Does this simple patch fix your problem?
Thanks,
Paul
---
arch/mips/kernel/unaligned.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/mips/kernel/unaligned.c b/arch/mips/kernel/unaligned.c
index 5c62065..28b3af7 100644
--- a/arch/mips/kernel/unaligned.c
+++ b/arch/mips/kernel/unaligned.c
@@ -1191,6 +1191,7 @@ static void emulate_load_store_insn(struct pt_regs *regs,
case ldc1_op:
case swc1_op:
case sdc1_op:
+ case cop1x_op:
die_if_kernel("Unaligned FP access in kernel code", regs);
BUG_ON(!used_math());
--
2.8.0
