The NXT version of the VM has some fixes for alignment problems on the ARM chip. What chip is the Nintendo DS?
Lawrie ----- Original Message ----- From: "Fleming, Craig" <[EMAIL PROTECTED]> To: "Lawrie Griffiths" <[EMAIL PROTECTED]>; <[email protected]> Sent: Tuesday, June 26, 2007 4:17 PM Subject: Re: [Lejos-discussion] Compiling Lejos for the Nintendo DS > I'm currently using the RCX code because that was the first thing I > downloaded. Is there an important difference? > > -----Original Message----- > From: Lawrie Griffiths [mailto:[EMAIL PROTECTED] > Sent: 2007-Jun-26 8:16 AM > To: Fleming, Craig; [email protected] > Subject: Re: [Lejos-discussion] Compiling Lejos for the Nintendo DS > > Craig, > > Are you using the RCX code or the NXT code? > > Lawrie > > ----- Original Message ----- > From: "Fleming, Craig" <[EMAIL PROTECTED]> > To: <[email protected]> > Sent: Monday, June 25, 2007 11:48 PM > Subject: [Lejos-discussion] Compiling Lejos for the Nintendo DS > > >> Hello everyone, >> >> I know that a similar topic was brought up many years ago, and I don't >> know if that was anything other than one developers little pet > project, >> or even if anyone who reads this is interested in this. But I had some >> free time and a desire to see if I could do it, so here it is. If > there >> is no interest, that's quite alright - I'll just keep plugging away > here >> :). I've run into a confusing problem and I had hoped someone in here >> might be able to help me out. Unfortunately C/C++ is not my native >> language - I know how to write some small programs but most of the > Lejos >> code is beyond me. >> >> I've managed to write/copy enough code to get Lejos to compile using >> DevKitPro/DevKitArm. I've been through a couple days of debugging, >> making steady progress until today. I'm in threads.c, in init_threads( >> Thread *thread ). What happens is: >> >> 1. A successful call is made to new_primitive_array, assigning to >> thread->stackFrameArray. >> 2. A successful call is made to new_primitive_array, assigning to >> thread->stackArray >> 3. An assertion exception 20 is thrown. >> >> I've been printfing my way around the code, and I've determined that >> thread->stackFrameArray is somehow corrupted between the second call > to >> new_primitive_array and the first line of this call. There is no code >> except the two printfs between the point of corruption. I fixed this >> problem by assigning to a temporary variable and then after the second >> call to new_primitive_array, I assign that temporary variable to >> thread->stackFrameArray. >> >> Still with me? :) This work-around keeps the pointers from being >> corrupted, but doesn't solve the problem! If I do this, a call to >> is_array still returns false, throwing the assertion 20. A few more >> printfs give me the reason I'm writing this - a strange situation that >> is beyond my knowledge. >> >> 1. A call to is_array just after the assignment to thread->stackArray >> returns 1. >> 2. A call to is_array just after THAT call to is_array returns 0! >> >> Here is the offending section of code, including the "work-around" >> (which is a problem I don't understand by itself), and the final two >> printfs. The first displays "1 1", the second displays "0 0". >> >> JINT stackFrameArray = ptr2word (new_primitive_array (T_STACKFRAME, >> INITIAL_STACK_FRAMES)); >> if (stackFrameArray == JNULL) >> return false; >> >> // Allocate actual stack storage (INITIAL_STACK_SIZE * 4 bytes) >> thread->stackArray = ptr2word (new_primitive_array (T_INT, >> INITIAL_STACK_SIZE)); >> thread->stackFrameArray = stackFrameArray; >> printf( "%d %d\n", is_array( word2obj(thread->stackFrameArray) ), >> is_array( word2obj(thread->stackArray) ) ); >> printf( "%d %d\n", is_array( word2obj(thread->stackFrameArray) ), >> is_array( word2obj(thread->stackArray) ) ); >> if (thread->stackArray == JNULL) >> { >> free_array (ref2obj(thread->stackFrameArray)); >> thread->stackFrameArray = JNULL; >> return false; >> } >> >> gThreadCounter++; >> >> #ifdef VERIFY >> assert (is_array (word2obj (thread->stackFrameArray)), THREADS0); >> assert (is_array (word2obj (thread->stackArray)), THREADS1); >> #endif >> >> Thanks for reading. >> >> Craig >> >> > ------------------------------------------------------------------------ > - >> This SF.net email is sponsored by DB2 Express >> Download DB2 Express C - the FREE version of DB2 express and take >> control of your XML. No limits. Just data. Click to get it now. >> http://sourceforge.net/powerbar/db2/ >> _______________________________________________ >> Lejos-discussion mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/lejos-discussion >> >> >> -- >> Internal Virus Database is out-of-date. >> Checked by AVG Free Edition. >> Version: 7.5.472 / Virus Database: 269.8.0/818 - Release Date: > 25/05/2007 >> 12:32 >> >> > > > ------------------------------------------------------------------------- > This SF.net email is sponsored by DB2 Express > Download DB2 Express C - the FREE version of DB2 express and take > control of your XML. No limits. Just data. Click to get it now. > http://sourceforge.net/powerbar/db2/ > _______________________________________________ > Lejos-discussion mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/lejos-discussion > > > -- > Internal Virus Database is out-of-date. > Checked by AVG Free Edition. > Version: 7.5.472 / Virus Database: 269.8.0/818 - Release Date: 25/05/2007 > 12:32 > > ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Lejos-discussion mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/lejos-discussion
