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Issue tracking for the ARM Trusted Firmware project
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el3_exit in bl31_entrypoint.S #172

Closed chinamao closed 10 years ago

chinamao commented 10 years ago

hi, experts: In bl31_entrypoint.S , ...... bl bl31_main b el3_exit

in el3_exit implementation, ...... bl restore_gp_registers ---> it will restore X0-X3

so, my questions is: Who saves X0-X3?

best wishes,

athoelke commented 10 years ago

I was expecting this to be fixed in the work to address #20, but looking at the code I now see that although we now provide a hook for platform code to initialize the X0-X7 arguments in BL2, we do not transfer these to the CPU context in bl31_prepare_next_image_entry() before calling el3_exit() and exiting to BL3-3.

This needs an additional fix.