Put gcc libs .data in specific section?

问题

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
}

SECTIONS
{
  .data 0x12004 : { *(.data); } >SHARED1
  .data2 0x19000 : { libc*(.data); } >SHARED2
}

回答1:

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

来源：https://stackoverflow.com/questions/15499006/put-gcc-libs-data-in-specific-section

标签

gcc

embedded

gnu

linker-scripts