Hi there,
I am currently seeing a relatively strange occurrence with the Keil compiler and linker overlapping two pieces of code into the same code area without showing any warnings or errors to the user.
Here are the details:
* Compiler/Linker versions:
CX51 COMPILER V9.02 - SN: K1NCC-YA1WVE COPYRIGHT KEIL ELEKTRONIK GmbH 1987 - 2010
LX51 LINKER/LOCATER V4.47a - SN: K1NCC-YA1WVE COPYRIGHT KEIL ELEKTRONIK GmbH 1995 - 2010
* Attached map file (linker_overlap.map), lines 651 - 653:
00CD88H 00CD93H 00000CH BYTE UNIT CODE_TIMER/B3 ?PR?_TIMER_INIT?TIMER *** OVERLAP *** 00CD89H 00CD95H 00000DH BYTE UNIT CODE/B3 ?L?COM000A
The linker is clearly overlapping two functions (timer_init and a linker optimized code block) in the same code space, causing timer_init to contain invalid code. It clearly detects it during linking, since it prints and *** OVERLAP *** message in the .map file, but it shows no errors or warnings.
* Additional details:
- Multiple libraries linked in with a mix of linker code packing enabled and disabled per library. - Warning level set to 2 in the .lin file (WARNINGLEVEL(2)) - Optimization level set to 9 (Common Block Subroutines) in all libraries
Thanks in advance!
Carles
I think Keil support is your only hope here; it's just too deep for people on a forum - with no sight of your system or your source code - to make meaningful, detailed analysis or comments.
Yep, as I think I mentioned earlier, we have already contacted Keil's support for this. However I thought I might as well give it a shot in the forums, although I am perfectly aware that not all information required has been made available.
When you get to a stage like this where you're having to pull every single trick in the book to the max to fight the limitations of the 8051 architecture, you really have to ask yourself whether it's worth the effort - or would it be less trouble to switch to another architecture that just doesn't have the limitations that you're fighting...
Yes, indeed I agree with you.
Thanks for your help!