STM CircleOS forum / Library

repzak · 2009-04-25 10:34:46

Hello,

I have made a project to circle_os there uses more than one c file, i have added them in a lib and everythings seems ok.

I just wonder howcome the circle_mgr only writes the application is 8Kb, when i know it atleast 3 times the size??

Kasper

Francis · 2009-04-25 13:15:40

Kasper,
Sorry but I don't understand the question. Circle_mgr find the first available address and link then program the object files at this address (circle_mgr calls the LD linker).
Francis

repzak · 2009-04-25 13:25:07

Connecting to RLink... OK
Connecting to target... OK
Silicon Revision Id: 0x10016414.
Option bytes: RDP=0xA5, USER=0xFF, WRP=0xFFFFFFFF
OK
Reading FAT table...
App0: Name=Test, Addr=0x08006000, Size=8KB.... OK

Larger free block= 318KB
Closing com with RLink... OK

O know the size is much bigger???

Kasper

Francis · 2009-04-27 06:28:30

If you check the contents of the FLASH (RFlasher), do you find any code after the address 0x08008000 ?

repzak · 2009-04-27 09:21:47

I will have to check.

But i am pretty sure the total code size in the lib is more than 20KB, i remember that some of the files are 6-9KB by them self.

The files in the picture are all in the LIB.

It is not very urgent for me now, but could give problems when adding app2?

Kasper

Last edited by repzak (2009-04-27 09:25:56)

Francis · 2009-04-27 10:25:02

It is supposed to work, and it would be nice to confirm whether the FLASH above the address 0x08008000 is programmed or not. Sometimes, most of the functions of the libraries are removed by the linker (because they are uncalled).

repzak · 2009-04-27 10:29:51

Oki, i have to check when i come home...

Kasper

VincentC · 2009-04-27 12:28:31

Hi,

During the link, if you have activated the "Per Function Sections" compiler option and "Remove Unused Sections" linker option, or if you are using libraries, then the linker will only take the code that is really called. This is a standard optimization that most compile chains are able to perform. That explains why most final applications are much smaller than the sum of the sizes of the object codes they are made from.

Considering that you are using a library and Circle_Mgr (which links using the "Remove Unused Sections" option), my guess is it's the explanation in your case.

Please refer to the GettingStartedARM (Raisonance), gcc and lc (GNU) documentations for more informations on the way the linker uses libraries, and on the two options mentionned above.

I hope it helps.

Best Regards,

Vincent

repzak · 2009-04-27 18:35:40

Hey,

Maybe it is because i checked in cirkle_mgr with the fat.elf file from debugging...

Kasper

Last edited by repzak (2009-04-27 18:35:53)

# 1 2009-04-25 10:34:46 Library

Library

# 2 2009-04-25 13:15:40 Library

Re: Library

# 3 2009-04-25 13:25:07 Library

Re: Library

# 4 2009-04-27 06:28:30 Library

Re: Library

# 5 2009-04-27 09:21:47 Library

Re: Library

# 6 2009-04-27 10:25:02 Library

Re: Library

# 7 2009-04-27 10:29:51 Library

Re: Library

# 8 2009-04-27 12:28:31 Library

Re: Library

# 9 2009-04-27 18:35:40 Library

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