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optee中支持的时间函数
2022-06-26 08:15:00 【代码改变世界ctw】
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[专题目录]–optee精选系列
optee支持以下3个获取时间的函数(也是GP规定的):
- (1)TEE_GetREETime(TEE_Time *time) // 获取REE系统时间戳
- (2)TEE_GetSystemTime(TEE_Time *time) // 获取TEE系统时间戳
- (3)TEE_GetTAPersistentTime(TEE_Time *time) // 获取当前TA的时间戳
注:与之对应的还有 TEE_SetTAPersistentTime(const TEE_Time *time)
这3个API函数都是通过系统调用,调用到底层的syscall_get_time, 在该函数中会根据传来的参数走不同的分支。
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