huge binary files with objcopy

Question

Im having problems when I define global variables in a basic C program for an ARM9 processor. I\'m using EABI GNU compiler and the binary generated from a 12KB elf is 4GB! I

Answer 1

I found the problem. The objcopy command will try to create the entire address space described in the linker script, from the lowest address to the highest including everything in between. You can tell it to just generate the ROM code as follows:

objcopy ./main.elf -j ROM --output-target=binary ./main.bin

I also changed the linker script slightly

MEMORY {
  ram(WXAIL) : ORIGIN = 0x01000000, LENGTH = 32K    
  rom(RX)    : ORIGIN = 0xFFFF0000, LENGTH = 32K                    
}

SECTIONS {
  ROM : { 
    *(vectors);
    *(.text);
    *(.rodata);
  } > rom 

  RAM : {
    *(.data); 
    *(.bss);
  } > ram 
}