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bdiGDB for GNU Debugger, BDI2000 (ColdFire)
User Manual
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Breakpoints:
There are two breakpoint modes supported. One of them (SOFT) is implemented by replacing application code with a HALT instruction. The other (HARD) uses the built in breakpoint logic. If HARD is
used, only up to 1 ( 4 for V4 cores ) breakpoints can be active at the same time.
The following example selects SOFT as the breakpoint mode:
BREAKMODE SOFT
;<AGENT> SOFT or HARD, HARD uses hardware breakpoints
All the time the application is suspended (i.e. caused by a breakpoint) the target processor remains
freezed.
Target Exceptions:
If enabled, the BDI will catch all unhandled exceptions. This is only possible if the vector table is writable. At vector 0 the BDI writes a HALT, RTE instruction sequence and lets all other vectors point to
this short exception handler. The BDI reads back the VBR after processing the initilaisation list in order to get the base address of the vector table.
[INIT]
WCREG 0x801
[TARGET]
VECTOR CATCH
0x00000000
;set vector base
;enable vector catching
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