Posted by Vien Nguyen Again, thank you for your help. Best regards, Vien Nguyen.
on June 18, 2003, 17:30:18, in reply to "Re: how to run both the kernel and my appl in RAM for debugging?"
64.114.124.58
Thank you and I appreciate your help Dexter. However, I am not sure how to construct a shadow vector table. The HMON uses some of the vectors, and the rest is left to the users. So how would I set up the shadow vector table, in C language? what do I need to do? Could you give me some guidance, or some sample code here? I use the EDK2329 kit.
Dexter wrote:
: Shadow vectors. As you know when an
: interrupt occurs the CPU branches
: to an address stored in the vector
: table. For a monitor it is handy
: to keep the address of the vector
: the same, this way the vector
: table doesnt change. Instead each
: vector points to a shadow table in
: RAM. Then then shadow table can
: redirect the CPU to the correct
: address, it does this by adding a
: H'5A000000 to the address, this
: then makes a JMP instruction to
: the new location. Changing the
: address of the ISR only changes
: the RAM contents not flash.
:
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