BreakAid

BreakAid is a module that hooks into the OS breakpoint system (not the same as Debugger) so that when the SWI OS_BreakPt is called, you’ll see this:

Breakpoint at &0000801C:
  R0  = &00008049   R1  = &00408000   R2  = &203C7BE4
  R3  = &00000068   R4  = &00008000   R5  = &3004575C
  R6  = &00000000   R7  = &00000068   R8  = &0000000A
  R9  = &300482F0   R10 = &FA208000   R11 = &FA207FA0
  R12 = &80000000   R13 = &00407FF0   R14 = &FC04D78C
  PC  = &0000801C   Flags: nzCv (&20000110)

[C]ontinue, [Q]uit, [D]ump registers, change [R]egister, sys[I]nfo
change [F]lags, display [M]emory, display [S]tack, PC dis[A]ssembly
Choice?

It is not designed to replace Debugger or DDT, but to offer another option.

http://www.heyrick.co.uk/software/breakaid/

Also available: the documentation in epub (non-Kindle) and mobi (Kindle) format.

Looking through the ‘BreakAid’ module – there is a couple of
swi XOS_ReadLine ie not swi XOS_ReadLine32

Are there any examples of simple ‘C’ modules around?

there is a couple of swi XOS_ReadLine ie not swi XOS_ReadLine32

An oversight on my part, but then BreakAid is only supposed to be called from application code (technical reasons why OS_BreakPt fails from SVC mode) and the RMA is not at an address where high bits are set.

Are there any examples of simple ‘C’ modules around?

People keep asking this. I keep posting this. Maybe there ought to be an FAQ page on the wiki for these sorts of things? ;-)

https://www.heyrick.co.uk/blog/index.php?diary=20150323

I haven’t had time to learn ARM assembly like I want to but this looks very useful!