diff options
Diffstat (limited to 'opcodes/s12z-opc.c')
| -rw-r--r-- | opcodes/s12z-opc.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/opcodes/s12z-opc.c b/opcodes/s12z-opc.c index eef097d..e7a3577 100644 --- a/opcodes/s12z-opc.c +++ b/opcodes/s12z-opc.c @@ -2205,8 +2205,16 @@ exg_sex_discrim (struct mem_read_abstraction_base *mra, enum optr hint ATTRIBUTE struct operand *op0 = create_register_operand ((eb & 0xf0) >> 4); struct operand *op1 = create_register_operand (eb & 0xf); - const struct reg *r0 = registers + ((struct register_operand *) op0)->reg; - const struct reg *r1 = registers + ((struct register_operand *) op1)->reg; + int reg0 = ((struct register_operand *) op0)->reg; + if (reg0 < 0 || reg0 >= S12Z_N_REGISTERS) + return OP_INVALID; + + int reg1 = ((struct register_operand *) op1)->reg; + if (reg1 < 0 || reg1 >= S12Z_N_REGISTERS) + return OP_INVALID; + + const struct reg *r0 = registers + reg0; + const struct reg *r1 = registers + reg1; enum optr operator = (r0->bytes < r1->bytes) ? OP_sex : OP_exg; |