把gcc libs .data放在特定的部分？ [英] Put gcc libs .data in specific section?

问题描述

我正在尝试切换到我们嵌入式系统的GNU GCC编译器，但是当我们的芯片的内存布局被拆分时，我无法连接项目：

  RAM部分1：0x10000-0x12FFF 
 RAM部分2：0x18000-0x1BFFF 
  

我们项目的数据可以适用于第1部分，但从gcc libs链接的数据不能。地图文件解压缩：

  .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 $ / $ / $ / $ / $ $ b  

是否可以将第二部分的libs中的.data部分放在？我尝试过不同的事情没有成功...链接脚本提取：

  MEMORY 
 {
 SHARED1 ：org = 0x10000，len = 0x3000 
 SHARED2：org = 0x18000，len = 0x4000 
} 
 
 SECTIONS 
 {
 .data 0x12004：{* （。数据）; }> SHARED1 
 .data2 0x19000：{libc *（。data）; }> SHARED2 
} 
  

解决方案

  SECTIONS 
 {
 .section_name：
 {
 * lib_a-impure.o（.data）; //这是访问目标文件部分的语法
}> SHARED1 
} 
  

更多信息： http://www.embedded.com/design/mcus-processors-and-socs/4026080/Building-Bare-Metal-ARM-Systems-with-GNU-Part-3

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
}

解决方案

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

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