Hi,
In the uboot1.1.6 code , there are some constants like
STACK_FRAME_OVERHEAD and STACK_UNDERHEAD in
the file "\include\ppc_asm.tmpl " . Could you please tell me what are
the use of those constants ?
Here is one statement in the macro CRITICAL_EXCEPTION_PROLOG in the
file "ppc_asm.tmpl"
subi r21,r1,INT_FRAME_SIZE+STACK_UNDERHEAD; /* alloc exc. frame */\
what is the need of STACK_UNDERHEAD here ?
In the macro STD_EXCEPTION there is a statement in the same file
addi r3,r1,STACK_FRAME_OVERHEAD
What is the need of STACK_FRAME_OVERHEAD here ?
Please clarify my doubts ....
Thanks
Dileep Kumar
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