如何编辑链接描述文件（用于STM32L476RG）进行固件升级？

Question

我正在尝试从TrueStudio生成固件代码以进行升级，该代码将发送到MCU（L476RG）的闪存中。首先，我必须编辑一个称为Debug_STM32L476RG_FLASH.ld的链接描述文件（如下所示），我什至找不到任何资源来解释某些术语，我用谷歌搜索并知道我应该创建一个UPGRADE_CODE内存，以存储重要的非擦除信息，例如固件中的升级代码本身，但是我对其他一些术语感到困惑，例如.isr_vector，.ARM.extab ....，尤其是我应该在UPGRADE_CODE中输入哪些术语，例如.text？

  

.text：{}> UPGRADE_CODE

/* Define output sections */
SECTIONS
{
/* The startup code goes first into FLASH */
 .isr_vector :
{
  . = ALIGN(4);
 KEEP(*(.isr_vector)) /* Startup code */
. = ALIGN(4);
} >FLASH

 /* The program code and other data goes into FLASH */
.text :
{
. = ALIGN(4);
*(.text)           /* .text sections (code) */
*(.text*)          /* .text* sections (code) */
*(.glue_7)         /* glue arm to thumb code */
*(.glue_7t)        /* glue thumb to arm code */
*(.eh_frame)

KEEP (*(.init))
KEEP (*(.fini))

. = ALIGN(4);
_etext = .;        /* define a global symbols at end of code */
} >FLASH
/* Constant data goes into FLASH */
.rodata :
{
. = ALIGN(4);
*(.rodata)         /* .rodata sections (constants, strings, etc.) */
*(.rodata*)        /* .rodata* sections (constants, strings, etc.) */
. = ALIGN(4);
} >FLASH

.ARM.extab   : { *(.ARM.extab* .gnu.linkonce.armextab.*) } >FLASH
.ARM : {
__exidx_start = .;
*(.ARM.exidx*)
__exidx_end = .;
} >FLASH

.preinit_array     :
{
PROVIDE_HIDDEN (__preinit_array_start = .);
KEEP (*(.preinit_array*))
PROVIDE_HIDDEN (__preinit_array_end = .);
} >FLASH
.init_array :
{
PROVIDE_HIDDEN (__init_array_start = .);
KEEP (*(SORT(.init_array.*)))
KEEP (*(.init_array*))
PROVIDE_HIDDEN (__init_array_end = .);
} >FLASH
.fini_array :
{
PROVIDE_HIDDEN (__fini_array_start = .);
KEEP (*(SORT(.fini_array.*)))
KEEP (*(.fini_array*))
PROVIDE_HIDDEN (__fini_array_end = .);
} >FLASH

/* used by the startup to initialize data */
_sidata = LOADADDR(.data);

/* Initialized data sections goes into RAM, load LMA copy after code */
.data : 
 {
. = ALIGN(4);
_sdata = .;        /* create a global symbol at data start */
*(.data)           /* .data sections */
*(.data*)          /* .data* sections */

. = ALIGN(4);
_edata = .;        /* define a global symbol at data end */
} >RAM AT> FLASH

_siram2 = LOADADDR(.ram2);

/* RAM2 section 
* 
* IMPORTANT NOTE! 
* If initialized variables will be placed in this section, 
* the startup code needs to be modified to copy the init-values.  
*/
.ram2 :
{
. = ALIGN(4);
_sram2 = .;       /* create a global symbol at ram2 start */
*(.ram2)
*(.ram2*)

. = ALIGN(4);
_eram2 = .;       /* create a global symbol at ram2 end */
 } >RAM2 AT> FLASH

/* Uninitialized data section */
. = ALIGN(4);
.bss :
{
/* This is used by the startup in order to initialize the .bss secion */
_sbss = .;         /* define a global symbol at bss start */
__bss_start__ = _sbss;
*(.bss)
*(.bss*)
*(COMMON)

. = ALIGN(4);
_ebss = .;         /* define a global symbol at bss end */
__bss_end__ = _ebss;
} >RAM

/* User_heap_stack section, used to check that there is enough RAM left */
._user_heap_stack :
{
. = ALIGN(4);
PROVIDE ( end = . );
PROVIDE ( _end = . );
. = . + _Min_Heap_Size;
. = . + _Min_Stack_Size;
. = ALIGN(4);
} >RAM

/* MEMORY_bank1 section, code must be located here explicitly            */
/* Example: extern int foo(void) __attribute__ ((section (".mb1text"))); */
.memory_b1_text :
{
*(.mb1text)        /* .mb1text sections (code) */
*(.mb1text*)       /* .mb1text* sections (code)  */
*(.mb1rodata)      /* read-only data (constants) */
*(.mb1rodata*)
} >MEMORY_B1

/* Remove information from the standard libraries */
/DISCARD/ :
{
libc.a ( * )
libm.a ( * )
libgcc.a ( * )
}

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