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 * @param exc_no    Exception number.
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 * @param exc_no    Exception number.
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 * @param istate    CPU state when exception occured.
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 * @param istate    CPU state when exception occured.
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 */
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 */
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void data_abort(int exc_no, istate_t *istate)
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void data_abort(int exc_no, istate_t *istate)
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{
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{
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    fault_status_t fsr __attribute__ ((unused)) =
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    fault_status_t fsr = read_fault_status_register();
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        read_fault_status_register();
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    uintptr_t badvaddr = read_fault_address_register();
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    uintptr_t badvaddr = read_fault_address_register();
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    pf_access_t access = get_memory_access_type(istate->pc, badvaddr);
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    pf_access_t access = get_memory_access_type(istate->pc, badvaddr);
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    int ret = as_page_fault(badvaddr, access, istate);
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    int ret = as_page_fault(badvaddr, access, istate);