At 11:40 PM 12/19/2001 -0800, David S. Miller wrote:
>They should trap on it or handle it, silent "garbage" is really not
>nice behavior.
hah, I wish. The ARM7 has seven "exception" vectors -- that's it.
0x00 = RESET
0x04 = Undefined instruction
0x08 = Software interrupt (SWI instruction, used to escape the restricted
USR cpu mode)
0x0C = Data abort (a very very very much lesser form of an access
violation; accessing memory that's physically not there)
0x10 = Prefetch abort (a data abort that happens trying to read the next
instruction)
0x14 = IRQ <- these two can't really even count as exceptions!
0x18 = FIQ <- which makes for five...
0x1C = <-
0x20 = <- Oh, yeah, and two "reserved" fields which aren't likely to ever
be used.
Anyway, this is a bit off-topic now.
-- Stevie-OReal programmers use COPY CON PROGRAM.EXE
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This archive was generated by hypermail 2b29 : Sun Dec 23 2001 - 21:00:21 EST