RTOS/AM5728: library contains ELF object files which are incompatible with the TI-COFF output file.

Hi,

Are you using any Processor SDK RTOS package for AM57x? What release? Those libraries are ELF format. The library we have, has .ae66 extension:

pdk_am57xx_1_0_12\packages\ti\csl\lib\am572x\c66\release
pdk_am57xx_1_0_12\packages\ti\drv\gpio\lib\am572x\c66\release
pdk_am57xx_1_0_12\packages\ti\board\lib\idkAM572x\c66\release

We don't support COFF library and haven't tried to build COFF library for them. Could your application use ELF format?

Regards, Eric

Hi,
I am using pdk_am57xx_1_0_10. I am trying to build COFF format. The story about application is that we can't use ELF since we are copying application directly to a memory segment in .hex format whilst RTOS is running. And when we use ELF format, .hex is incomplete. The cinit section is not loaded, ie our variables are not initialized, and application runs amock. We need COFF files (libraries) or a way to initialize application variables in elf .hex file. Is such thing possible? I have read in compiler manual that a special loader is needed ? How do we get(write) this (if COFF files are not available. )

Thanks!

Hi,

You mentioned:
"..\..\LIB\C66x\Include\ti.csl.a66"
"..\..\LIB\C66x\Include\ti.board.a66
"..\..\LIB\C66x\Include\ti.csl.a66"
"..\..\LIB\C66x\Include\ti.gpio.a66

We have compiled them with coff option in top rules.make.

Can you elaborate how you change the build rules to get those libraries? Or you may attach a build log showing how the source code is compiled and archived into a COFF library? And can you upload one library like ti.gpio.a66 we can check?

Regards, Eric

Hi Eric,

Please verify your results. Use libinfo6x utility in your cgt to check if .a66 archive contains elf or ti coff v2 files within. If you change only top makefile to format=coff this will ocurr. But if you change the comiler version to 7.2.x and some other setting, which I Will send to you once i get into office tomorow, you will get the coff format but only for gpio. Other components will contain error and will not compile.  For example osal will stop during i2c compilation, etc. More details tomorow. Unfortunately we have a timezone discrpancy..

So please verify your results and if they are in deed coff, than please be so kind and send them over.

Kindest regards,

Nikola

Hi,

It looks that you used "make gpio FORMAT=COFF" to build the C66x coff library. I tried that and I got a .a66 file.
What is your syntax for libinfo6x? c:\ti\ti-cgt-c6000_8.2.2\bin>libinfo6x.exe c:\ti\pdk_am57xx_1_0_12\packages\ti\drv\gpio\lib\am572x\c66\release\ti.drv.gpio.a66 -o=test.txt?

I didn't get anything meaningful in the output test.txt. Issue is that we don't support COFF library and never tried to build it although the makefile seems to able to do it.

Regards, Eric

Hi Eric,

I must apologize, I told you to use wrong tool, I wasn't at the office, so I was wingin it. here it is:

C:\ti\ti-cgt-c6000_8.2.2\bin\ofd6x.exe -v -o=board.txt ti.drv.gpio.a66

The output is in correct case:

ARCHIVE: ti.drv.gpio.a66

OBJECT FILE:  GPIO_drv.o66

 Object File Information

    File Name:                 GPIO_drv.o66             
    Format:                    TI-COFF Version 2        
    File Type:                 relocatable file         
    Time Stamp:                Wed Dec  5 14:50:27 2018
    Machine:                   TI C6x                   
    Machine Endian:            little endian            
    Entry Point:               0x00000000               
    Vendor:                    Texas Instruments, Inc.  
    Producer:                  Assembler                
    Assembler Version:         7.4.24                   
    Number of Sections:        17                       
    File Length:               10269                    
    File Offset in Archive:    0x17c                    
    Symbol Table File Offset:  0x00002230               
    String Table File Offset:  0x00002668               
    TI-COFF f_flags:           0x00000100               
    CPU Generation:            C6200                    
    Control Data Endian:       little endian            

 Section Information
...

and when compiled with FORMAT=COFF this is the end/wrong result:

ARCHIVE: ./ti/ti.drv.gpio.a66

OBJECT FILE:  GPIO_drv.o66

 Object File Information

    File Name:               GPIO_drv.o66           
    Format:                  ELF Version 1          
    File Type:               relocatable file       
    Machine:                 TI C6x                 
    Machine Endian:          little endian          
    Entry Point:             0x00000000             
    Vendor:                  Texas Instruments, Inc.
    Producer:                Assembler              
    Assembler Version:       8.2.2                  
    Number of Sections:      217                    
    File Length:             41736                  
    File Offset in Archive:  0x2680                 
    ELF Class:               32-bit objects         
    ELF e_flags:             0x00000000             

 Section Information

    <0> "(no name)"
       Load Address:        0x00000000  Run Address:        0x00000000

...

To get first, correct result I have changed the following things:

in: C:\ti\pdk_am57xx_1_0_10\packages\ti\build\Rules.make

change   CGT_VERSION=8.2.1

to   CGT_VERSION=7.4.2

in  C:\ti\pdk_am57xx_1_0_10\packages\ti\build\makerules\build_config.mk

# Format : Allowed values = COFF | ELF
FORMAT = COFF

in  C:\ti\pdk_am57xx_1_0_10\packages\ti\build\makerule:

(line 58)

# Derive compiler switch and part of RTS Library name based on FORMAT: COFF/ELF
ifeq ($(FORMAT),COFF)
  CSWITCH_FORMAT = --abi=coffabi
  RTSLIB_FORMAT = _coff
  CSWITCH_FORMAT = --abi=coffabi
  XDCINTERNAL_DEFINES = -Dxdc_target_types__=ti/targets/std.h
endif

Thanks and kind regards,

Nikola

Nikola,

My archived library also showed as:

ARCHIVE: c:\ti\pdk_am57xx_1_0_12\packages\ti\drv\gpio\lib\am572x\c66\release\ti.drv.gpio.a66

OBJECT FILE: GPIO_drv.o66

Object File Information

File Name: GPIO_drv.o66
Format: ELF Version 1
File Type: relocatable file
Machine: TI C6x
Machine Endian: little endian
Entry Point: 0x00000000
Vendor: Texas Instruments, Inc.
Producer: Assembler
Assembler Version: 8.2.2
Number of Sections: 217
File Length: 41788
File Offset in Archive: 0x2680
ELF Class: 32-bit objects
ELF e_flags: 0x00000000

After you changed the CGT tools and linker options, did the COFF only work for GPIO library or also work for others (CSL, board, etc)?

Regards, Eric