[avr-gcc-list] avr-objcopy failed to produce coff/ext-coff

[choo kok seng]

Hi,

        I am using winavr to compile a simple c code with the compiler option dwarf2 enabled.

CFLAGS = -ggdwarf-2,

 but I failed to generate extcoff file. The following is the command line I used to generate the extcoff file, I always get "no recognized debugging information":

 

make extcoff

 

Converting to AVR Extended COFF: led.cof
avr-objcopy --debugging --change-section-address .data-0x800000 --change-section
-address .bss-0x800000 --change-section-address .noinit-0x800000 --change-sectio
n-address .eeprom-0x810000  -O coff-ext-avr led.elf led.cof

avr-objcopy: led.elf: no recognized debugging information

 

Therefore, when I load the led.cof with AVRStudio, there it says that there is no source code information.

 

Can anyone shed me some light on this ?

 

Also, I tried to load the led.elf directly with the AVRStudio using JTAGICE mkII. The problem is that sometimes it works sometimes it does not, very unrelieable. When it does not work, the output window show the following message:

JTAGICE mkII DebugWire failure: MAX_BIT_LENGTH_DIFF
Coordinator Error when writing memory contents to the debug platform.
Coordinator Error loading object file.

Anyone has any fix regarding loading ELF file on AVRStudio?

 

Thanks in advance.

 

regards

kchoo

 

 

 

Below is the full compilation output

===================================

 

Compiling: main.c
avr-gcc -c -mmcu=attiny2313 -I. -gdwarf-2 -DF_CPU=1000000UL -I../../../../Apps/W
inAVR/avr/include  -Os -funsigned-char -funsigned-bitfields -fpack-struct -fshor
t-enums -Wall -Wstrict-prototypes -Wa,-adhlns=main.lst  -std=gnu99 -MD -MP -MF .
dep/main.o.d main.c -o main.o
main.c: In function `main':
main.c:100: warning: unused variable `val'
main.c:101: warning: unused variable `i'

 

Linking: led.elf
avr-gcc -mmcu=attiny2313 -I. -gdwarf-2 -DF_CPU=1000000UL -I../../../../Apps/WinA
VR/avr/include  -Os -funsigned-char -funsigned-bitfields -fpack-struct -fshort-e
nums -Wall -Wstrict-prototypes -Wa,-adhlns=main.o  -std=gnu99 -MD -MP -MF .dep/l
ed.elf.d main.o --output led.elf -Wl,-Map=led.map,--cref    -lm

 

Creating load file for Flash: led.hex
avr-objcopy -O ihex -R .eeprom led.elf led.hex

 

Creating load file for EEPROM: led.eep
avr-objcopy -j .eeprom --set-section-flags=.eeprom="alloc,load" \
--change-section-lma .eeprom=0 -O ihex led.elf led.eep

 

Creating Extended Listing: led.lss
avr-objdump -h -S led.elf > led.lss

 

Creating Symbol Table: led.sym
avr-nm -n led.elf > led.sym