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Tool/software: Code Composer Studio
Hello everyone,
Given the following pieces of program code:
myStrCmpFile is placed at address 0x82000.
As I understand, it should be possible to call function myStrCmp from secure Flash Sector C, shoudn’t it?
Anyway, myStrCmp function does not return the expected value when the system is standalone (But it works well in debug mode).
If I unlock Z1 and Z2 zones before calling myStrCmp, it works well, even in standalone mode:
It also works if I just unlock Zone 2.
Can anybody tell me where my mistake is?
Many thanks in advance,
Andreu
Hi Vivek,
Many thanks for your quick answer. Here are mines:
1) In debug mode, I am unlocking via flash plug-in GUI.
2) My stack is placed in RAMM1.
3) All the RAMs are non-secure.
4) The only ONLYEXE sector is FLASHB.
5) There is no ONLYEXE RAM.
6) As I undertand, strcmp (a library function) is placed in FLASHB as I can see in the .map file. I do not know how this function is implemented but I do not think it tries to read constant data from FLASHB. Anyway, other functions like strcpy or strlen have the same problem. This the Sector Summary:
Best,
Andreu
Hello Viveck,
Many thanks for your answer.
I have done what you said and think the problem is that, sometimes, one or both parameters of the function are constant strings stored in Zone 2:
As Zone 2 is secure, the strcmp function in Zone 1 cannot read string s1, so it does not work. What do you think? Is there any possibility to do this (apart from unlocking Z2 before calling myStrCmp function and locking it after) ?
Best regards,
Andreu
