diff options
Diffstat (limited to 'opcodes/aarch64-dis.c')
| -rw-r--r-- | opcodes/aarch64-dis.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/opcodes/aarch64-dis.c b/opcodes/aarch64-dis.c index ae53e49..b9c1559 100644 --- a/opcodes/aarch64-dis.c +++ b/opcodes/aarch64-dis.c @@ -1179,7 +1179,22 @@ aarch64_ext_sysreg (const aarch64_operand *self ATTRIBUTE_UNUSED, /* op0:op1:CRn:CRm:op2 */ info->sysreg.value = extract_fields (code, 0, 5, FLD_op0, FLD_op1, FLD_CRn, FLD_CRm, FLD_op2); - return 1; + info->sysreg.flags = 0; + + /* If a system instruction, check which restrictions should be on the register + value during decoding, these will be enforced then. */ + if (inst->opcode->iclass == ic_system) + { + /* Check to see if it's read-only, else check if it's write only. + if it's both or unspecified don't care. */ + if ((inst->opcode->flags & (F_SYS_READ | F_SYS_WRITE)) == F_SYS_READ) + info->sysreg.flags = F_REG_READ; + else if ((inst->opcode->flags & (F_SYS_READ | F_SYS_WRITE)) + == F_SYS_WRITE) + info->sysreg.flags = F_REG_WRITE; + } + + return TRUE; } /* Decode the PSTATE field operand for e.g. MSR <pstatefield>, #<imm>. */ |