ARM GCC linker script

Ref: http://enginechang.logdown.com/posts/255812-introduction-to-stm32f429-linker-script 

進入點

/* Entry Point */
ENTRY(Reset_Handler)  

Memory 實體

/* Specify the memory areas */
MEMORY
{
  ROM(rx) : ORIGIN = 0x00000000, LENGTH = 1048396
  TCM_RAM(rwx) : ORIGIN = 0x1FFF0000, LENGTH = 65536
  BUS_RAM(rwx)  : ORIGIN = 0x10000000, LENGTH = 458752
}

Text 段

    *(.rotext*)
    *(.text.rom*)
    *(.text .text.* *.text .gnu.linkonce.t.*)

    . = ALIGN(4);

    /* glue_7: arm code calling thumb code */

    *(.glue_7)

    /* glue_7t: thumb code calling arm code */

    *(.glue_7t)

    *(.eh_frame*)

    KEEP(*(.init))

    KEEP(*(.fini))

    . = ALIGN(4);

    _etext = .;

        *(.ARM.extab* .gnu.linkonce.armextab.*)

---

exidx 和 extab 要放在不同 sections

   PROVIDE_HIDDEN (__exidx_start = .);

    .ARM.exidx :

    {

      *(.ARM.exidx* .gnu.linkonce.armexidx.*)

    } > BUS_RAM

    PROVIDE_HIDDEN (__exidx_end = .);

---

        . = ALIGN(4);

        /* preinit data */

        PROVIDE (__preinit_array_start = .);

        KEEP(*(.preinit_array))

        PROVIDE (__preinit_array_end = .);

         /* init data */

        . = ALIGN(4);

        KEEP(*(.init))

        /* init data */

        . = ALIGN(4);

        PROVIDE (__init_array_start = .);

        KEEP(*(SORT(.init_array.*)))

        KEEP(*(.init_array))

        PROVIDE (__init_array_end = .);

        /* .ctors */

        . = ALIGN(0x4);

        KEEP (*crtbegin.o(.ctors))

        KEEP(*crtbegin?.o(.ctors))

        KEEP(*(EXCLUDE_FILE(*crtend?.o *crtend.o) .ctors))

        KEEP (*(SORT(.ctors.*)))

        KEEP (*crtend.o(.ctors))

        KEEP(*(.ctors))

         /* finit data */

        . = ALIGN(4);

        KEEP(*(.fini))

        . = ALIGN(4);

        PROVIDE (__fini_array_start = .);

        KEEP(*(SORT(.fini_array.*)))

        KEEP(*(.fini_array))

        PROVIDE (__fini_array_end = .);

        /* .dtors */

        . = ALIGN(4);

        KEEP (*crtbegin.o(.dtors))

        KEEP(*crtbegin?.o(.dtors))

        KEEP(*(EXCLUDE_FILE(*crtend?.o *crtend.o) .dtors))

        KEEP(*(SORT(.dtors.*)))

        KEEP(*crtend.o(.dtors))

        KEEP(*(.dtors))

        KEEP(*(.eh_frame*))

       KEEP(*(.jcr*))

---

BSS

    .bss  (NOLOAD):

    {

        . = ALIGN(4);

        __bss_start__ = .;

        _sbss = . ;

        _szero = .;

        _start_bss = .;

    *(.bss .bss*)

    *(COMMON)

        . = ALIGN(4);

        _ebss = . ;

        _ezero = .;

        __bss_end__ = .;

        _end_bss = . ;

    }

--

    /DISCARD/ :

    {

       libc.a (*)

       libm.a (*)

       libgcc.a (*)

    }

    .ARM.attributes 0 : { *(.ARM.attributes) }

--