Data transmission method and apparatus in tee systems

A non-transitory, computer-readable medium storing one or more instructions that, when executed by a computer system of a trusted execution environment (TEE) system, cause the computer system to perform operations for exchanging data in the TEE system, wherein the operations comprise:

• obtaining data by a thread running on a TEE side of the TEE system, wherein the TEE system also comprises a non-TEE side and a shared memory, the shared memory comprising a first address, a second address, and multiple consecutive third addresses;
• obtaining, by the thread, a write offset address by reading the first address, the write offset address indicating a writable start address in the multiple consecutive third addresses;
• obtaining, by the thread, a read offset address by reading the second address, the read offset address indicating a readable start address in the multiple consecutive third addresses;
• determining, by the thread, whether a number of bytes in the data is less than or equal to a number of writable bytes, wherein the number of writable bytes is determined based on the write offset address and the read offset address, and wherein each address corresponds to one byte;
• and
• in response to determining that the number of bytes in the data is less than or equal to the number of writable bytes, writing, by the thread, the data into at least a portion of the multiple consecutive third addresses starting from the write offset address.

A computer-implemented system, comprising:

• one or more computers of a trusted execution environment (TEE) system;
• and
• one or more computer memory devices interoperably coupled with the one or more computers and having tangible, non-transitory, machine-readable media storing one or more instructions that, when executed by the one or more computers, cause the one or more computers to perform one or more operations for exchanging data in the TEE system, wherein the operations comprise:
• obtaining data by a thread running on a TEE side of the TEE system, wherein the TEE system also comprises a non-TEE side and a shared memory, the shared memory comprising a first address, a second address, and multiple consecutive third addresses;
• obtaining, by the thread, a write offset address by reading the first address, the write offset address indicating a writable start address in the multiple consecutive third addresses;
• obtaining, by the thread, a read offset address by reading the second address, the read offset address indicating a readable start address in the multiple consecutive third addresses;
• determining, by the thread, whether a number of bytes in the data is less than or equal to a number of writable bytes, wherein the number of writable bytes is determined based on the write offset address and the read offset address, and wherein each address corresponds to one byte;
• and
• in response to determining that the number of bytes in the data is less than or equal to the number of writable bytes, writing, by the thread, the data into at least a portion of the multiple consecutive third addresses starting from the write offset address.