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pwrite 64bit address fail #360

@geiliwanghaichao

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@geiliwanghaichao

h2c_fd_ = open("/dev/xdma0_h2c_0", O_RDONLY | O_NONBLOCK);
Writing data to a 64-bit address in the FPGA using pwrite fails:
pwrite(0x0000200070000000) fail(Bad address)
However, writing to a 32-bit address works fine.

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