ack/mach/proto/grind/READ_ME

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1994-06-24 14:02:31 +00:00
$Id$
1991-09-16 11:47:43 +00:00
The machine-dependant part of the ACK debugger support requires three
routines:
___Get_PC takes a frame pointer (local base) argument and returns the
return address from this frame.
___Set_PC takes a frame pointer (local base) argument plus a return
address and sets the return address of this frame to the
return address supplied.
??? a third routine which is called at every line (see for
instance mach/m68020/ncg/mach.c for an example of how to
do this). This routine must save the scratch registers
and then call (or jump to) ___uX_LiB. If this is a call,
___Get_PC and ___Set_PC are complicated by the existance
of a procedure frame that we do not want the "grind" user
to know about. See for instance the mach/m68020/libdb version
for how to solve this problem.