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STM32 链接脚本笔记

目录

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ENTRY( _start )

__stack_size = 512;

PROVIDE( _stack_size = __stack_size );

MEMORY
{
    FLASH (rx) : ORIGIN = 0x00000000, LENGTH = 192K
    RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 26K
}

SECTIONS
{
    .init :
    {
        _sinit = .;
        . = ALIGN(4);
        KEEP(*(SORT_NONE(.init)))
        . = ALIGN(4);
        _einit = .;
    } >FLASH AT>FLASH
    
 /*   .vector :
    {
        *(.vector);
    } >FLASH AT>FLASH */
    
    .highcodelalign : 
    {       
        . = ALIGN(4);
        PROVIDE(_highcode_lma = .); 
    } >FLASH AT>FLASH 
    
    .highcode : 
    {
        . = ALIGN(4);
        PROVIDE(_highcode_vma_start = .);
        *(.vector);
        KEEP(*(SORT_NONE(.vector_handler)))
        *(.highcode);
        *(.highcode.*);
        . = ALIGN(4); 
        PROVIDE(_highcode_vma_end = .);
    } >RAM AT>FLASH
     
    .text :
    {
        . = ALIGN(4);
        KEEP(*(SORT_NONE(.handle_reset)))
        *(.text)
        *(.text.*)
        *(.rodata)
        *(.rodata*)
  *(.sdata2.*)
        *(.glue_7)
        *(.glue_7t)
        *(.gnu.linkonce.t.*)
        . = ALIGN(4);
    } >FLASH AT>FLASH 

    .fini :
    {
        KEEP(*(SORT_NONE(.fini)))
        . = ALIGN(4);
    } >FLASH AT>FLASH

    PROVIDE( _etext = . );
    PROVIDE( _eitcm = . );  

    .preinit_array  :
    {
      PROVIDE_HIDDEN (__preinit_array_start = .);
      KEEP (*(.preinit_array))
      PROVIDE_HIDDEN (__preinit_array_end = .);
    } >FLASH AT>FLASH 
    
    .init_array     :
    {
      PROVIDE_HIDDEN (__init_array_start = .);
      KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))
      KEEP (*(.init_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .ctors))
      PROVIDE_HIDDEN (__init_array_end = .);
    } >FLASH AT>FLASH 
    
    .fini_array     :
    {
      PROVIDE_HIDDEN (__fini_array_start = .);
      KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*) SORT_BY_INIT_PRIORITY(.dtors.*)))
      KEEP (*(.fini_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .dtors))
      PROVIDE_HIDDEN (__fini_array_end = .);
    } >FLASH AT>FLASH 
    
    .ctors          :
    {
      /* gcc uses crtbegin.o to find the start of
         the constructors, so we make sure it is
         first.  Because this is a wildcard, it
         doesn't matter if the user does not
         actually link against crtbegin.o; the
         linker won't look for a file to match a
         wildcard.  The wildcard also means that it
         doesn't matter which directory crtbegin.o
         is in.  */
      KEEP (*crtbegin.o(.ctors))
      KEEP (*crtbegin?.o(.ctors))
      /* We don't want to include the .ctor section from
         the crtend.o file until after the sorted ctors.
         The .ctor section from the crtend file contains the
         end of ctors marker and it must be last */
      KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .ctors))
      KEEP (*(SORT(.ctors.*)))
      KEEP (*(.ctors))
    } >FLASH AT>FLASH 
    
    .dtors          :
    {
      KEEP (*crtbegin.o(.dtors))
      KEEP (*crtbegin?.o(.dtors))
      KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors))
      KEEP (*(SORT(.dtors.*)))
      KEEP (*(.dtors))
    } >FLASH AT>FLASH 

    .dalign    : 
    {
        . = ORIGIN(RAM) + SIZEOF(.highcode);
    } >RAM AT>FLASH 

    .dlalign :
    {
        . = ALIGN(4); 
        PROVIDE(_data_lma = .);
    } >FLASH AT>FLASH

    .data :
    {
        . = ALIGN(4); 
        PROVIDE(_data_vma = .);
        *(.gnu.linkonce.r.*)
        *(.data .data.*)
        *(.gnu.linkonce.d.*)
        . = ALIGN(8);
        PROVIDE( __global_pointer$ = . + 0x800 );
        *(.sdata .sdata.*)
        *(.gnu.linkonce.s.*)
        . = ALIGN(8);
        *(.srodata.cst16)
        *(.srodata.cst8)
        *(.srodata.cst4)
        *(.srodata.cst2)
        *(.srodata .srodata.*)
        . = ALIGN(4);
        PROVIDE( _edata = .);
    } >RAM AT>FLASH

    .bss :
    {
        . = ALIGN(4);
        PROVIDE( _sbss = .);
        *(.sbss*)
        *(.gnu.linkonce.sb.*)
        *(.bss*)
        *(.gnu.linkonce.b.*)        
        *(COMMON*)
        . = ALIGN(4);
        PROVIDE( _ebss = .);
    } >RAM AT>FLASH

    PROVIDE( _end = _ebss);
    PROVIDE( end = . );
    
    .stack ORIGIN(RAM) + LENGTH(RAM) - __stack_size :
    {
        PROVIDE( _heap_end = . );   
        . = ALIGN(4);
        PROVIDE(_susrstack = . );
        . = . + __stack_size;
        PROVIDE( _eusrstack = .);
    } >RAM 
}

布局

FLASH布局

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0x00000000
┌──────────────────────────┐
│ .init                    │
├──────────────────────────┤
│ .highcode LMA            │ ← RAM code 的 Flash 镜像
│ .vector LMA              │
│ .vector_handler LMA      │
├──────────────────────────┤
│ .text                    │
│ .rodata                  │
├──────────────────────────┤
│ .fini                    │
├──────────────────────────┤
│ .preinit_array           │
├──────────────────────────┤
│ .init_array              │
├──────────────────────────┤
│ .fini_array              │
├──────────────────────────┤
│ .ctors                   │
├──────────────────────────┤
│ .dtors                   │
├──────────────────────────┤
│ .data LMA                │ ← RAM data 初始值
├──────────────────────────┤
│                          │
│ unused Flash             │
│                          │
└──────────────────────────┘
0x00030000

RAM布局

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0x20000000
┌─────────────────────────┐
│ .highcode               │
│                         │
│ Vector                  │
│ Interrupt Handler       │
│ RAM Code                │
├─────────────────────────┤
│ .data                   │
│                         │
├─────────────────────────┤
│ .bss                    │
│                         │
├─────────────────────────┤
│                         │
│ Heap / free RAM         │
│                         │
├─────────────────────────┤
│ Stack 512B              │
└─────────────────────────┘
0x20006800
Licensed under CC BY-NC-SA 4.0