Building application without runtime library support on CCS6:no memory is allocated to functions

Abhimanyu Kumar said:

I am able to build successfully but no memory is allocated to any of the functions. 

I am not sure what you mean here.  I suggest you attach the linker map file from this build to your next post.

Thanks and regards,

-George

Please find attachment of linker file, map file and hex file3157.Files.zip.

Thanks and regards,

Abhimanyu

Thank you.  But I still cannot explain what happened.  Please attach your project to your next post.  In CCS, right-click on the project name and choose Export.  In the next dialog expand the General selection and choose Archive File.  Click Next.  I think creating a .zip file is straightforward from that point.

If, for some reason, you are unable to send in your project, then please show the contents of the Console view (not the Problems view) after a complete build from scratch.  Create the text file with the icon in the upper right bar of the Console view titled Copy Build Log.

Thanks and regards,

-George

Please find attachment of build log.

5850.BUILD_LOG.TXT

Could you please provide a sample project which does not include RTS and any initialization code(c_init). 

My requirement is that a single chip will have two application.

One application will be having all initialization call,RTS library and other functionality, this will be called after every reset.

Second application will have user defined functions which will be referenced by first application.In second library i don't need any RTS support as well as initialization code.

So could you please provide any sample project which does not uses RTS and initialization code and getting build. 

I am using ARM compiler 5.2.6 of CCS6.

Thanks,

Abhi

Abhimanyu Kumar said:

So could you please provide any sample project which does not uses RTS and initialization code and getting build. 

It makes more sense for this second project to be a library project.  At a conceptual level, a library is a collection of related object files.  Other projects can call functions or use data defined by the library.  This post describes how to create a library project in CCS.  This wiki article describes how to make the association between the main project and the library project.

Thanks and regards,

-George

Hi,

Thanks for your suggestion, Yes I can create library static or RTS, but our requirement is to have to separate output(*.hex/*.out)  files, library creation won't be a helpful in our case. So, our requirement is project configuration where I can build without runtime library/Intialization code. Please let me know how we can build application without RTS and initialization code.

I tried using batch files but this also yield same result i.e. output file with no memory allocated to functions.

Thanks & Regards,

Abhimanyu Kumar

I am unable to reproduce a build where the .text section (and many others) is empty.  Please send in the project where this occurs.  This is the only way I know to figure out what is happening.

Thanks and regards,

-George

Hello Abhimanyu,

It looks like you want to compile the files without linking.  However,  the make files are created to generate a separate out file for each c/cpp file. Therefore, if you have more than one c/cpp file, you will get more than one out file.

Stephen

I have already selected that option.

Please find attachment of a sample project.driverlib.zip

In this project init file and runtime is not included, one function pointer table 'ROM_APITable' is defined due to which decompress function is getting called and as runtime library is not present so getting link time error.

I don't  need this decompress function and function pointer table is must in my actual project. let me know how to build this project.

Thanks & Regards

Abhimanyu

I don't have access to CCS today.

You need to create an entry point that has the name _c_int00.  The map file (.map) shows that it is currently undefined.

Also, the the .ccsproject file shows (see below) that the rts is "libc.a".  I would think that it would be set to "" if you selected none.

<?xml version="1.0" encoding="UTF-8" ?>
<?ccsproject version="1.0"?>
<projectOptions>
	<deviceVariant value="com.ti.ccstudio.deviceModel.TMS470.GenericCortexM3Device"/>
	<deviceFamily value="TMS470"/>
	<deviceEndianness value="be32"/>
	<codegenToolVersion value="5.0.1"/>
	<isElfFormat value="true"/>
	<connection value=""/>
	<rts value="libc.a"/>
	<templateProperties value="id=com.ti.common.project.core.emptyProjectWithMainTemplate,"/>
	<isTargetManual value="false"/>
</projectOptions>

I have requirement to create two application that will be downloaded on same chip. One will have c_init (say app1)and other will not have(say app2).

app1 will call API's of app2 when ever required. In app2 there shall not be any initialization and run time library. 

The sample project which I have shared is for app2.

Thanks & Regards

Abhimanyu

Hello Abhimanyu,

Have you already set up the linker command file for app2 so that each of the api functions are located at specific addresses?  You will need to specify the address for each function since app1 has to know where each function is located.

Is the app2 in C or C++?

If C, I would do the following for the app2 linker command script:

1. Remove .cinit, .pinit, .stack and .esysmem

2. Create an empty function and set that function as the the application entry point.   I am not sure about the arm compiler settings, but for the C2000, the application entry point setting is located in the property dialog box at CCS Build->C2000 Linker->Advanced Options->Symbol Management.

Stephen

It seems <rts value="libc.a"/> is correct even though rts is set to none.

Abhimanyu Kumar said:

app1 will call API's of app2 when ever required. In app2 there shall not be any initialization and run time library. 

The sample project which I have shared is for app2

In that case, think you need to use the RETAIN Pragma on ROM_APITable to tell the linker it must preserve the ROM_APITable, which should then also link in the functions pointed to by ROM_APITable.

i.e. try:

#pragma DATA_SECTION(ROM_APITable, ".romapitable")
#pragma RETAIN(ROM_APITable)
UI *ROM_APITable[] =
{
   (UI *)ROM_API1Table,
   (UI *)ROM_API2Table,
   (UI *)ROM_API3Table
};

Abhimanyu Kumar said:

I am wondering why compiler is calling __TI_decompress_none automatically even if it is no where called in application, i think it is due to function pointer table, but this is must required.

Since the ROM_APITable array isn't changed by the program, you can const qualify the ROM_APITable by changing to:

#pragma DATA_SECTION(ROM_APITable, ".romapitable")
UI *const ROM_APITable[] =
{
   (UI *)ROM_API1Table,
   (UI *)ROM_API2Table,
   (UI *)ROM_API3Table
};

With this change the __TI_decompress_none is no longer called and the program links without error:

Building target: test.out
Invoking: ARM Linker
"/opt/ti/ti_ccs6_1_1/ccsv6/tools/compiler/ti-cgt-arm_5.2.6/bin/armcl" -mv6M0 --code_state=16 --abi=eabi -me -O4 --opt_for_speed=1 --fp_mode=relaxed -g --optimize_with_debug=on --display_error_number --diag_warning=225 --auto_inline=0 --gen_opt_info=2 --single_inline -k --asm_listing -z -m"test.map" --heap_size=0 --stack_size=256 -i"/opt/ti/ti_ccs6_1_1/ccsv6/tools/compiler/ti-cgt-arm_5.2.6/lib" -i"/opt/ti/ti_ccs6_1_1/ccsv6/tools/compiler/ti-cgt-arm_5.2.6/include" --disable_auto_rts --warn_sections --display_error_number --xml_link_info="test.xml" --rom_model --unused_section_elimination=off --zero_init=on -o "test.out" "./source/chip/test_dac.obj" "../test.cmd"  
<Linking>
warning #10062-D: entry-point symbol "_c_int00" undefined
warning #10202-D: no suitable entry-point found; setting to 0
Finished building target: test.out
 
Create flash image: Intel-HEX
"/opt/ti/ti_ccs6_1_1/ccsv6/tools/compiler/ti-cgt-arm_5.2.6/bin/armhex" -i "test.out" -o "test.hex" -order LS -romwidth 32
Translating to Intel format...
   "test.out" .romapitable ==> .romapitable
   "test.out" .text ==> .text
   "test.out" .const ==> .const
 

**** Build Finished ****