Hi Pedro,
in your first example there is only one step missing in comparison to
the second one: Your code is assembled but not linked against anything.
So if you have a look at your assembler file and also at your object
file (msp430-nm size-test.o) you have one locally linked static int
variable (size 2Bytes) and two global "common objects" which will be
resolved on link time (with other objects). The latter ones are not jet
counted to the bss segment (however they will be positioned there
later). You can check out this (not for production purposes ;°):
add a line
void* __stop_progExec__;
to your size-test.c file
do the steps from your first example and finally do
msp430-ld -o size-test size-test.o
then look at the object size-test with
msp430-size size-test
msp430-nm size-test
you will find your symbols allocated in the bss segment.
The appropriate steps are included in the complete way (as in your
second example). You usually use the gcc (msp430-gcc) call as wrapper
for all of these steps. So you find the same (correct) results as in the
previous case.
Best regards
Arnd-Hendrik
Pedro Zorzenon Neto wrote:
Hi,
I think I found a bug in msp430-size. I'll show it with an example:
/* --- begin of code --- */
int i;
static int j;
volatile int k;
int main (void) {
return 1;
}
/* --- end of code --- */
msp430-gcc -mmcu=msp430x149 -I/usr/local/msp430/msp430/include -Wall -O1 -S
size-test.c -o size-test.s
msp430-as -mmcu=msp430x149 size-test.s -o size-test.o
msp430-size size-test.o
text data bss dec hex filename
10 0 2 12 c size-test.o
msp430-gcc -mmcu=msp430x149 -B/usr/local/msp430/msp430/lib size-test.o -o
size-test
msp430-size size-test
text data bss dec hex filename
110 0 6 116 74 size-test
Why is msp430-size reporting "2" in the "bss" field for file size-test.o?
Thanks in advance,
Pedro
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