Put gcc libs .data in specific section?

Question

I'm trying to switch to the GNU GCC compiler for our embedded system, but I'm having trouble linking the project as the memory layout of our chip is split: ``` RAM section 1: 0x10000-0x12FFF RAM section 2: 0x18000-0x1BFFF ``` The data from our project can fit in section 1, but the data linked from the gcc libs doesn't. Map file extract: ``` .data 0x00012974 0x3c4 c:/tools/gnucr16_v1.1.3-elf/cr16-elf/bin/../lib/gcc/cr16-elf/4.5.1-GNUCR16_v1.1.3/../../../../cr16-elf/lib\libc.a(lib_a-impure.o) 0x00012974 _impure_ptr .data 0x00012d7c 0x410 c:/tools/gnucr16_v1.1.3-elf/cr16-elf/bin/../lib/gcc/cr16-elf/4.5.1-GNUCR16_v1.1.3/../../../../cr16-elf/lib\libc.a(lib_a-mallocr.o) 0x00012d7c __malloc_av_ 0x00013184 __malloc_trim_threshold 0x00013188 __malloc_sbrk_base ``` Is it possible to put the .data section from the libs in the 2nd section? I've tried different thing without success... Linker script extract: ``` MEMORY { SHARED1 : org = 0x10000, len = 0x3000 SHARED2 : org = 0x18000, len = 0x4000 }…

Accepted Answer

```
SECTIONS
{
  .section_name:
  {
    *lib_a-impure.o (.data);  //That is the syntax to access sections of object files
   } >SHARED1
}
```

More info here: http://www.embedded.com/design/mcus-processors-and-socs/4026080/Building-Bare-Metal-ARM-Systems-with-GNU-Part-3

Put gcc libs .data in specific section?

Solution

Problem