What controls which data goes in which default sections?

TobyM

Hi Folks

In CCS projects there are CMD files which command the linker where to place sections within RAM and FLASH, but is there a file which controls what goes into the sections?

For non-default sections the user uses a #pragma DATA_SECTION directive to specify this, is there similar for the default "." sections or is this intrinsic to the C/C++ linker?

For example what tells the linker what to put in .ebss?

over 12 years ago

0 Igor Gorbachev over 12 years ago

Guru 20525 points

Hi!

CMD-file is command linker file. ".ebbs" is the command line directly. So... For example:

int a = 10;// command ".ebbs" allocates memory for int a & int b

int b = 8;// command ".cinit" places in memory 10 & 8

void main(void)

{

int y;// command ".stack" allocates memory for int y

y = a+b;// command ".text" places in memory code y = a+b

}

Thus software will be divided into parts, each parts will be placed in its memory section:

[global variables] [the initial values of global variables] [local variables] [executable program code]

Separation of program code and data allows to achieve flexibility in the allocation of memory resources and corresponds to Harvard architecture of these processors.

Regards,

Igor