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Annotation of qemu/roms/openbios/Documentation/README.debugger, revision 1.1

1.1     ! root        1: The following Forth words can be used for debugging:
        !             2: 
        !             3:    debug <xt> - Mark word for debugging
        !             4:    debug-off  - Unmark all words for debugging
        !             5:    resume     - Return from subordinate Forth interpreter
        !             6: 
        !             7: The source debugger also implements the following commands when it has been activated:
        !             8: 
        !             9:    Up - Unmark current word for debugging, mark parent and continue
        !            10:    Down - Mark next word for debugging
        !            11:    Trace - Continue execution until end of word displaying
        !            12:            debug information
        !            13:    Rstack - Display contents of the Rstack
        !            14:    Forth - Launch subordinate Forth interpreter
        !            15: 
        !            16: An example session:
        !            17: 0 > see boot 
        !            18: : boot
        !            19:   linefeed parse cr " platform-boot" $find if
        !            20:   execute then
        !            21:   2drop cr " Booting " type type cr "   ... not supported on this system." type cr
        !            22:   ;
        !            23:  ok
        !            24: 0 > debug boot 
        !            25: Stepper keys: <space>/<enter> Up Down Trace Rstack Forth
        !            26:  ok
        !            27: 0 > boot 
        !            28: : boot  ( Empty ) 
        !            29: 00000000ffe26b08: linefeed  ( a ) 
        !            30: 00000000ffe26b10: parse  ( ffec6e24 0 ) 
        !            31: 00000000ffe26b18: cr 
        !            32:  ( ffec6e24 0 ) 
        !            33: 00000000ffe26b20: (")  ( ffec6e24 0 ffe26b30 d ) 
        !            34: 00000000ffe26b40: $find  ( ffec6e24 0 ffe31710 ffffffffffffffff ) 
        !            35: 00000000ffe26b48: do?branch  ( ffec6e24 0 ffe31710 ) 
        !            36: 00000000ffe26b58: execute [sparc64] Booting file 'cdrom' with parameters ''
        !            37: Not a bootable ELF image
        !            38: Not a Linux kernel image
        !            39: Not a bootable a.out image
        !            40: Loading FCode image...
        !            41: Loaded 5936 bytes
        !            42: entry point is 0x4000
        !            43: Evaluating FCode...
        !            44: open isn't unique.
        !            45: Boot load failed.
        !            46:  ( Empty ) 
        !            47: 00000000ffe26b60: dobranch  ( Empty ) 
        !            48: 00000000ffe26bf8: (semis) 
        !            49: [ Finished boot ]  ok
        !            50: 0 > 

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