From: SourceForge.net <no...@so...> - 2004-05-18 07:07:28
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Bugs item #954959, was opened at 2004-05-16 22:31 Message generated for change (Comment added) made by maartenbrock You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=100599&aid=954959&group_id=599 Category: msc51(8051) target Group: fixed Status: Open Resolution: None Priority: 5 Submitted By: Nobody/Anonymous (nobody) Assigned to: Nobody/Anonymous (nobody) Summary: Bad xdata init Initial Comment: I've run into what I believe is a bug. Maybe there is something I just overlooked. I'm using a system on which code is in "external memory", thus code and external RAM are sharing a common space. I've used the right options to select the code start and xram start (and size): --iram-size 256 --xram-loc 0x1740 --xram-size 1024 --code-loc 0x0000 --code-size 5952 The linker puts everything in the right place, but there is a problem with the run-time library: during initialization of the external RAM, the variables that are in XRAM are initialized with zeros (which is OK), but instead of starting at the address mentioned in --xram-loc, it seems to start at 0x0000, which then overwrites some of the code on my system. I think this shouldn't be happening. Or should we re-compile the run-time library in a case like this? If so, how? I think this is not at all clearly stated in the docs (as far as I've read). For the time being, I use the option --no-xinit-opt and handle things myself, but I think there is something wrong. Thanks for considering this "bug" report. ---------------------------------------------------------------------- Comment By: Maarten Brock (maartenbrock) Date: 2004-05-18 09:07 Message: Logged In: YES user_id=888171 Hi Guillaume, The first thing you have to do is make sure this line is somewhere in your source/header files: sfr _XPAGE at 0x92; //same as MPAGE Please report back with the results. Maarten ---------------------------------------------------------------------- Comment By: Guillaume (rosanis) Date: 2004-05-17 22:41 Message: Logged In: YES user_id=1043238 Oops, sorry. SDCC : mcs51/gbz80/z80/avr/ds390/pic16/pic14/TININative/xa51/ds40 0/hc08 2.4.1 (May 16 2004) (MINGW32) The microcontroller I'm developing for is an EZ-USB FX with 8KB internal XRAM. ---------------------------------------------------------------------- Comment By: Maarten Brock (maartenbrock) Date: 2004-05-17 12:08 Message: Logged In: YES user_id=888171 Before this can be answered fully, we need to know the following: 1) What version of SDCC are you using? (use sdcc -v) 2) What specific microcontroller are you using? Greets, Maarten ---------------------------------------------------------------------- Comment By: Maarten Brock (maartenbrock) Date: 2004-05-17 11:12 Message: Logged In: YES user_id=888171 Before this can be answered fully, we need to know the following: 1) What version of SDCC are you using? (use sdcc -v) 2) What specific microcontroller are you using? Greets, Maarten ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=100599&aid=954959&group_id=599 |