[PATCH v3 1/3] [sim/riscv] Fix crash during instruction decoding

[<jaydeep.patil@imgtec.com>]

From: Jaydeep Patil <jaydeep.patil@imgtec.com>

The match_never() function has been removed and thus step_once() crashes
during instruction decoding. Fixed it by checking for null pointer before
invoking function attached to match_func member of riscv_opcode structure.
---
 sim/riscv/sim-main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sim/riscv/sim-main.c b/sim/riscv/sim-main.c
index afdfcf50656..8a23d2aa1f9 100644
--- a/sim/riscv/sim-main.c
+++ b/sim/riscv/sim-main.c
@@ -1041,7 +1041,7 @@ void step_once (SIM_CPU *cpu)
   for (; op->name; op++)
     {
       /* Does the opcode match?  */
-      if (! op->match_func (op, iw))
+      if (! op->match_func || ! op->match_func (op, iw))
 	continue;
       /* Is this a pseudo-instruction and may we print it as such?  */
       if (op->pinfo & INSN_ALIAS)
-- 
2.25.1