How does the 64Bit-Exception breakpoint mask: FFFFFFFF 00FFFFFF works? and also the i and il command, also here:
https://eab.abime.net/showthread.php?t=102444
a little help and some remarks in blue
Quote:
Originally Posted by Toni Wilen
Mask FFFF matches all vectors from 0 to 15 which includes all usual "something went wrong" exceptions.
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Code:
>?$ffff ; for all Exceptions from 0 to 15
$0000FFFF = %00000000`00000000`11111111`11111111 = 65535 = 65535
>?$0020 ; Bit 5 is set for Exception 5
$00000020 = %00000000`00000000`00000000`00100000 = 32 = 32
>il $20
Exception breakpoint mask: 00000000 00000020
This works in my test with Exception 5, but the infomessage 'Exception 5, PC=000278A8' is missed.
The maskvalue is a little bit complicated. but this can help:
>?1<<5 ; for Exception 5
$00000020 = %00000000`00000000`00000000`00100000 = 32 = 32
>?1<<27 ; for Exception 27
$08000000 = %00001000`00000000`00000000`00000000 = 134217728 = 134217728
>il ; disable the exception breakpoint
Exception breakpoint mask: 00000000 00000000
>il ; enables the exception breakpoint with default mask
Exception breakpoint mask: FFFFFFFF 00FFFFFF
>
With default mask, Exception 27: Lvl 3 Int doesn't break, therefore change the maskvalue to
>il $8FFFFFF
Exception breakpoint mask: 00000000 08FFFFFF
>?1<<(47-32) ; for Exceptions from 32 to 47
>il $FFFFFFFF ; 0 bis 31
Exception breakpoint mask: 00000000 FFFFFFFF
>il $FFFFFFFFFFFF ; >32Bit masks are not possible
Exception breakpoint mask: 00000000 FFFFFFFF
>
Code:
a normal exception occurs in singlestep mode with:
>t
Exception 5, PC=000278A8
VPOS: 106 ($06a) HPOS: 009 ($009) COP: $0001ede4
and with il
>il
Exception breakpoint mask: FFFFFFFF 00FFFFFF
>g
; Exception 5, PC=000278A8 ; but this info is missed here
VPOS: 009 ($009) HPOS: 127 ($07f) COP: $0000046c
...
00fc081e 616c bsr.b #$6c == $00fc088c
Code:
>i ; i $14 is not possible, it's always the complete list
...
$00000014 05: DIV BY 0 $00FC081E
...
>m 14 1
00000014 00FC 081E 00FC 0820 00FC 0822 00FC 090E ....... ..."....
>d FC081E 1
00fc081e 616c bsr.b #$6c == $00fc088c
>d rl($14) 1
00fc081e 616c bsr.b #$6c == $00fc088c
on the end, disable the exception breakpoint with
>il
Exception breakpoint mask: 00000000 00000000
otherwise the debugger reopens again and it can't be closed with >x
without il the program runs into the exception without a break.
If you only break on any next exception, then use the tx-command.
Code:
>tx
Exception 5, PC=000278A8
Cycles: 0 Chip, 0 CPU. (V=105 H=51 -> V=105 H=51)
...
00fc081e 616c bsr.b #$6c == $00fc088c
i [<addr>] Dump contents of interrupt and trap vectors.
The helptext
i [<addr>] is wrong, it's only i, please change the helptext or make also the argument possible, like: i 6c