In a C application, I want to place a big buffer at an address after the variables, stack and dma address ranges. Of course I can define a section in the wanted location in the linker script and declare a big array in C and give a section attribute to the array. But I want to do it without actually declaring the big array because it makes the executable too big. I want to use the array address to do the same.
I'm using gcc and try to use an address I define in the linker script inside the C source file.
Here is how I tried it.
in the linker script file (which is ldabtsm.lds.S in my case),
...
. = ALIGN(16777216);
.vimbuffs : {
*(.vimbuffs)
}
vimbuffs = .;
...
I tried using vimbuffs in the C source file.
So I did (if I can print, I can use it anyway..)
extern unsigned int vimbuffs; // from linker script
printf("vimbuffs = %x\n", vimbuffs);
From the map file, I can see the vimbufs is assigned to 0x3b3f6000 which is just right, I want it to be aligned. But when run the program and print the value, I see
vimbuffs = a07f233d
What is wrong?
