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October 2005

3 participants
2 discussions

OpenBIOS/xbox patch
by Rink Springer Oct. 29, 2005

Oct. 29, 2005

Hi everyone, Based on Ed's work, I've made a patch to really make the XBox support work :-) It contained two minor flaws, both of which are fixed by the patch. If I apply it, I see the OpenBIOS welcome screen. You can download it from http://rink.nu/downloads/xbox-patches/openbios-xbox.diff. Feel free to apply it in the tree. -- Rink P.W. Springer - http://rink.nu "God, root, what is difference?" - Pitr, Userfriendly

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toke core dumps
by Prasanna Kumar Oct. 6, 2005

Oct. 6, 2005

Hello All, When I try to tokenize a large FCode source file, the tokenizer crashes with Segmentation Fault. Debug messages: tst.fth:6763: debug: tokenizing control word 'endof' tst.fth:6764: debug: read token 'endcase', length=7 tst.fth:6764: debug: matched internal opcode 0x0013 tst.fth:6764: debug: tokenizing control word 'endcase' tst.fth:6764: debug: endcase offset 0x8401 tst.fth:6764: debug: endcase offset 0xffff83f1 ?????????? Segmentation fault (core dumped) When I looked at the code, the offending function was in emit.c : s16 receive_offset(void) { s16 offs=0; if (offs16) { offs= ((*opc)<<8)|(*(opc+1)); } else { offs=(*opc); } return offs; } If the msb of *opc is set 1(Value >0 0x8yyy), the offs gets changed to ffff8yyy. Changing offs to u16 and receive_offset returning value of u16 type would solve the problem. Change the prototype for receive_offset in emit.h as well. Modified code: u16 receive_offset(void) <----This line changed { u16 offs=0; <---- This line changed if (offs16) { offs= ((*opc)<<8)|(*(opc+1)); } else { offs=(*opc); } return offs; } Steps to reproduce the problem very simply: - Create a fcode source file with around 7000 variables. - Use the following simple test code: : test ( -- ) 1 to temp1 2 to temp2 temp1 case 1 of ." One" cr endof 2 of temp2 ." Two" cr endof endcase ; - Run tokenizer on the file. toke will core dump. Regards, Prasanna __________________________________ Yahoo! Mail - PC Magazine Editors' Choice 2005 http://mail.yahoo.com

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