cFS porting to GR740 BSP, using RKI

[zunione]

Hello, 👋
I am trying to port the cFS project on a GR740 board.

Discussion #314 has been very helpful, and I succeeded in implementing TARFS in cFS itself.
All the apps have been loaded except for cfe_assert, which I assumed is not essential since it is a test module.

Right now, I am working on the RKI project. I thought it would be nice if I had a shell prompt to use.
So in other words, I am starting a whole new porting project from scratch.
I wrote the mentioned info about TARFS to let you know I have some (very light) experience on cFS porting 😅

I looked through the BeagleBoneBlack demo and LEON3-RCC demo by @alanc98 ...
BBB version was quite easy, I just needed the BBB board, which I had.

The problem is the LEON3-RCC version and GR740 version that I have to implement.
I got the notion that cFS have to be built as an relocatable, not an executable.
This was done by setting RTEMS_DYNAMIC_LOAD TRUE.

From what I gathered, the difference between BBB version and LEON3-RCC version is static loading and dynamic loading.
I didn't know what I should try, so I went on trying the LEON3-RCC version to decide.
(I thought if I understood both versions I could port GR740 demo easily)

But unlike BBB, the repository did not have a cFS submodule.
I tried with the main branch and modified some settings, but cFS does not work in LEON3 version of RKI.

The problems I encountered:

1. The cross-compiler couldn't find <LINK_FLAGS> from RCC's lib directory.
   Solved - I added CMAKE_EXE_LINKER_FLAGS_INIT explicitly.

2. RKI couldn't mount the file system.
   Solved - SIS simulator didn't have enough memory allocated. I reduced RAM_DISK_0_BLOCKS.

3. Now, RKI stops here.

sis> run


RTEMS Kernel Image Booting


*** RTEMS Info ***
5.0.0


 BSP Ticks Per Second = 100
*** End RTEMS info ***

Populating Root file system from TAR file.
Setting up filesystems.
setup_ramdisk: Registering RAM disk at /dev/rda (blocks=8192, block_size=512)
setup_ramdisk: SUCCESS - RAM disk registered
rki_init_network: Calling system_init.
Initializing network
ERR: Could not ioctl tun: Operation not permitted
greth: driver attached
**** PHY ****
Vendor: 885   Device: 11   Revision: 2
Current Operating Mode: 100 Mbit Full Duplex
Autonegotiation Time: 0ms
�������"�"ay��C��CInitializing network DONE

Destination     Gateway/Mask/Hw    Flags     Refs     Use Expire Interface
default         192.168.0.1        UGS         0        0      0 gr_eth1
127.0.0.1       127.0.0.1          UH          0        0      0 lo0
192.168.0.0     255.255.255.0      U           0        0      1 gr_eth1
192.168.0.1                        UHL         1        0      1 gr_eth1

************ INTERFACE STATISTICS ************
***** lo0 *****
Address:127.0.0.1       Net mask:255.0.0.0       
Flags: Up Loopback Running Multicast
Send queue limit:50   length:0    Dropped:0       
***** gr_eth1 *****
Ethernet Address: 00:80:7F:22:61:79
Address:192.168.0.67    Broadcast Address:192.168.0.255   Net mask:255.255.255.0   
Flags: Up Broadcast Running Simplex
Send queue limit:50   length:0    Dropped:0       
      Rx Interrupts:0             Rx Packets:0                 Length:0              Non-octet:0       
            Bad CRC:0                Overrun:0             Tx Interrupts:0             Maximal Frags:1             GBIT MAC:0       


Starting the FTP Server.
syslog: ftpd: FTP daemon started (1 session max)
Initializing Local Commands.
Adding Target specific commands
Running /shell-init.

1: mkdir ram
2: mkrfs /dev/rda
3: mount -t rfs /dev/rda /ram
mounted /dev/rda -> /ram
4: hello
    ____  ______________  ________ 
   / __ \/_  __/ ____/  \/  / ___/ 
  / /_/ / / / / __/ / /\_/ /\__ \  
 / _, _/ / / / /___/ /  / /___/ /  
/_/ \_| /_/ /_____/_/  /_//____/   

Hello RTEMS!
Create your own command here!
Starting shell....


RTEMS Shell on /dev/console. Use 'help' to list commands.
shell0 [/] # startcfedl
shell0 [/] # handle: 0x40c6e090 has unresolved externals
dlsym OK: symbol OS_BSPMain found
*** Calling OS_BSPMain() - cFS startup beginning ***


*** RTEMS Info ***
Copyright (C) 1989, 2020 RTEMS Project and contributors
rtems-5.0.0 (SPARC/w/FPU-detect/leon3)

 Stack size=0
 Workspace size=8388608
RTEMS_NO_CMDLINE:TRUE, command line not implemented
*** End RTEMS info ***

I don't know how I can go on. Sorry for the naive question, but I really don't.
Is there some other way I can debug? It's really hard to start debugging because of the process of loading cFS into RKI. (The error logs go missing, I think)

Or do I have to clear all settings about RTEMS in cFS, because RKI does all the settings?
I thought of this because in the cFS version of RKI-BBB demo, there are just a few source files in psp/fsw/generic-rtems.

I appriciate all help! Thank you all!