发明名称 |
A SECURE MECHANISM TO SWITCH BETWEEN DIFFERENT DOMAINS OF OPERATION IN A DATA PROCESSOR |
摘要 |
A data processing apparatus including processing circuitry having a secure domain and a further different secure domain and a data store for storing data and instructions. The data store includes a plurality of regions each corresponding to a domain, and at least one secure region for storing sensitive data accessible by the data processing circuitry operating in the secure domain and not accessible by the data processing circuitry operating in the further different secure domain and a less secure region for storing less sensitive data. The processing circuitry is configured to verify that a region of the data store storing the program instruction corresponds to a current domain of operation of the processing circuitry and, if not, to verify whether the program instruction includes a guard instruction and, if so, to switch to the domain corresponding to the region of the data store storing the program instruction. |
申请公布号 |
EP2885738(A1) |
申请公布日期 |
2015.06.24 |
申请号 |
EP20130773826 |
申请日期 |
2013.09.17 |
申请人 |
ARM LIMITED |
发明人 |
GROCUTT, THOMAS CHRISTOPHER;BILES, STUART DAVID;CRASKE, SIMON JOHN |
分类号 |
G06F21/52;G06F21/55;G06F21/74 |
主分类号 |
G06F21/52 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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