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Rev 3908 Rev 4265
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        jz      .nothing
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        jz      .nothing
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; 1c. Allocate memory for device data.
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; 1c. Allocate memory for device data.
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; For now, we need sizeof.usb_device_data and extra 8 bytes for GET_DESCRIPTOR
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; For now, we need sizeof.usb_device_data and extra 8 bytes for GET_DESCRIPTOR
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; input and output, see usb_after_set_address. Later we will reallocate it
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; input and output, see usb_after_set_address. Later we will reallocate it
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; to actual size needed for descriptors.
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; to actual size needed for descriptors.
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        push    sizeof.usb_device_data + 8
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        movi    eax, sizeof.usb_device_data + 8
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        pop     eax
 - 
 
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        push    ecx
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        push    ecx
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        call    malloc
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        call    malloc
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        pop     ecx
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        pop     ecx
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; 1d. If failed, free the bus address and return zero.
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; 1d. If failed, free the bus address and return zero.
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        test    eax, eax
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        test    eax, eax
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        mov     ecx, sizeof.usb_device_data / 4
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        mov     ecx, sizeof.usb_device_data / 4
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        rep movsd
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        rep movsd
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        pop     edi esi
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        pop     edi esi
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        call    usb_reinit_pipe_list
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        call    usb_reinit_pipe_list
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; 1d. Free the old memory.
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; 1d. Free the old memory.
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; Note that free destroys ebx.
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        push    ebx
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        call    free
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        call    free
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        pop     ebx
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        pop     eax
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        pop     eax
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; 2. Issue control transfer GET_DESCRIPTOR(DEVICE) for full descriptor.
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; 2. Issue control transfer GET_DESCRIPTOR(DEVICE) for full descriptor.
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; restore length saved in step 1a
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; restore length saved in step 1a
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        pop     edx
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        pop     edx
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        add     eax, sizeof.usb_device_data
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        add     eax, sizeof.usb_device_data