modifying boot loader
David Edelsohn
dje at watson.ibm.com
Tue Mar 30 09:36:50 EST 1999
What are you actually trying to accomplish? The values at
pin_obj_start are not magic numbers or instructions but user-friendly
values mapped at address 0. It is trying to map values 0x0 and 0XBADFCA11
(bad function call) so that dereferencing a data pointer or a PowerOpen
ABI function pointer at address zero (0) will produce a visual clue. This
is produced by assembly like:
addr0:
.long 0
.long 0xBADFCA11
And you make the linker map label addr0 at physical address 0.
David
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