Hi all,
I just want to start a new thread regarding another issue I mentioned in an
earlier mail.
When porting some programs to the latest MSPGCC version from RedHat/TI, I
noticed that ALL initialized global variables in my C code are not
initialized by the crt0 code.
After looking around in the crt* sources, I noticed there is a procedure
meant to do that in the "msp430-elf/tools/libgloss/msp430/crt_movedata.S"
file.
When compiling my program using the standard linker scripts provided with
the toolchain, I can't see this procedure anywhere in the linked executable.
I was not able to see if the problem lays in the linker script itself or in
the compiled crt0 procedures.
However, I can restore the proper functionality by re-writing the
crt_movedata procedure directly in my C code and calling it first thing
when entering the main():
"...
extern const unsigned char * __datastart;
extern const unsigned char * __romdatastart;
extern const unsigned int __romdatacopysize;
void my_crt_movedata(void) {
__asm__ __volatile__(
"mov #__datastart, R12 \n\t"
"mov #__romdatastart, R13 \n\t"
"mov #__romdatacopysize, R14 \n\t"
"call #memmove"
);
}
int main(void) {
my_crt_movedata();
WDTCTL = WDTPW | WDTHOLD; // Disable watchdog timer
..."
As this solution is definitely not acceptable, does someone has an idea
about what currently goes wrong in the current toolchain release (crt ?
linker script ? ...).
Is this mailing list also the right place to report this kind of issues ?
Thanks a lot,
Olivier
PS: currently running:
msp430-elf-gcc (GCC) 4.9.1 20140707 (prerelease (msp430-14r1-98)) (GNUPro
14r1) (Based on: GCC 4.8 GDB 7.7 Binutils 2.24 Newlib 2.1)
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