[avr-gcc-list] avarice again

[Klaus Rudolph]

Hallo all,

I took a short look inside the avarice sources and found
no function to set the PC. So I must not
wonder that I am not able to set PC from gdb. Or have
I overseen something? 

I think that there must be a 'cAAAA' command which 
set PC to new execution position and 
therefor must be a way to get the AAAA to the device via
jtag. But inside the remote.cc i found:

    240     case 'c':  // cAA..AA    Continue from address AA..AA(optional)
    241     // try to read optional parameter, pc unchanged if no parm
    242 #if 0 // not yet supported
    243     if(hexToInt(&ptr, &addr))
    244     {
    245         registers[PC] = addr;
    246     }
    247 #endif
    248     if (jtagContinue())
    249     {
    250         strcpy(remcomOutBuffer, "S05"); // Just tell it a break
happened.
    251     }
    252     else
    253     {
    254         // A breakpoint did not occur. Assume that GDB sent a break.
    255 
    256         // NEED SOMETHING MORE CLEVER THAN THIS!!
    257 
    258         // Flush the GDB command buffer.
    259         (void)tcflush(gdbFileDescriptor, TCIFLUSH);
    260         // Halt the target.
    261         finishCommand();
    262         // Send signal up to gdb. Sadly, I can't find in the GDB
manual,
    263         // which signal to send up. When you run GDB locally under
    264         // Linux, a CTRL-C results in GDB saying "Program received
    265         // signal SIGINT, Interrupt." This should mean that the
    266         // following should work. So far, I can only get GDB to
either
    267         // declare that "The program no longer exists" or simply not
    268         // return the GDB prompt to me :-(.
    269 //      strcpy(remcomOutBuffer, "W02"); // Just tell it interrupt
occured.
    270         strcpy(remcomOutBuffer, "S05"); // Just tell it a break
happened.
    271 //      strcpy(remcomOutBuffer, "W07"); // Just tell it a break
happened.
    272 //      strcpy(remcomOutBuffer, "S03"); // Just tell it interrupt
occured.
    273 //      strcpy(remcomOutBuffer, "S17"); // Just tell it processed
stoped.
    274 //      strcpy(remcomOutBuffer, "W00"); // Just tell it processed
stoped.
    275     }
    276     break;

This seems not to be working way to set PC, or?

Same I found with single step instructions: 'sAAAA'
Also only set a breakpoint here :-(

How do you set the execution position with gdb and avarice?
Which gdb commands can I use to debug? 


Thanks
    Klaus

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