[msp430-elf] Incorrect placement of uninitialized variables to .noinit

I am unable to reproduce this problem.  I tried this very simple example ...

int global;

int main()
{
   return global;
}

With both compiler versions, the variable global ends up in the .bss section.

Please supply a test case which shows global variables ending up in the .noinit section.  Please include the exact compiler options used.

Thanks and regards,

-George

I have narrowed it down further. Looks like it is not an issue with the compiler, but related to a change in the linker scripts. In my case, I saw the issue when building for MSP430F5529.

Using the simple example you specified, the following commands will recreate the issue:

D:/programs/mspgcc_ti_3.2.2.0/bin/msp430-elf-gcc -mmcu=msp430f5529 -T D:/programs/mspgcc_ti_3.2.2.0/include/msp430f5529.ld -o gcc_bug.elf main.c
D:/programs/mspgcc_ti_3.2.2.0/bin/msp430-elf-objdump -t -j .bss -j .noinit gcc_bug.elf > gcc_bug.txt

The resulting txt file:

gcc_bug.elf:     file format elf32-msp430

SYMBOL TABLE:
0000247e l    d  .bss    00000000 .bss
00002490 l    d  .noinit    00000000 .noinit
0000247e l     O .bss    00000001 completed.2761
00002480 l     O .bss    00000002 dtor_idx.2763
00002482 l     O .bss    0000000e object.2776
00002490 g     O .noinit    00000002 global
0000247e g       .bss    00000000 __bssstart
00004400 g       .noinit    00000000 __stack
00002492 g       .noinit    00000000 _end

If I force it to use the old linker script (from 2.1.1.0) the "global" symbol is mapped to bss correctly. I tried a 1xx-series device and it worked fine too.

Hi George,

I'm a newbie - I am hoping that you answer may be of value to a problem that I have been having of late.

I am writing code using the the MSP430 MSPGCC compiler targeting the MSP430F5529, when I create an new project, I immediately see the following error on compilatyion: no memory region specified for loadable section `.noinit.crt0'

Is this the same issue of a malformed linker script? Where can I obtain the old linker scripts as a work around?

Thanks.

Here are the last few lines of the log.

'Building target: Test.out'
'Invoking: GNU Linker'
"C:/energia-0101E0013/hardware/tools/msp430/bin/msp430-gcc.exe" -mmcu=msp430fr4133 -Os -g -gstrict-dwarf -Wall -Wl,-Map,"Test.map" -o"Test.out" "./main.o" -T"../msp430fr4133.ld" -Wl,--start-group -l"c" -l"gcc" -Wl,--end-group
c:/energia-0101e0013/hardware/tools/msp430/bin/../lib/gcc/msp430/4.6.3/../../../../msp430/bin/ld.exe: error: no memory region specified for loadable section `.noinit.crt0'

I am unable to reproduce this error. Perhaps if you post your project I can reproduce it.

Thanks and regards,

-George