85 lines
2.6 KiB
Plaintext
85 lines
2.6 KiB
Plaintext
/*
|
|
GNU linker script for SAMD21
|
|
*/
|
|
|
|
/* Specify the memory areas */
|
|
MEMORY
|
|
{
|
|
/* Leave 8KiB for the bootloader, 256b for internal config and 256b for user config. */
|
|
FLASH (rx) : ORIGIN = 0x00000000 + 0x2000, LENGTH = 0x00040000 - 0x2000 - 0x100 - 0x100
|
|
RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 0x008000 /* 32 KiB */
|
|
}
|
|
|
|
/* top end of the stack */
|
|
/* stack must be double-word (8 byte) aligned */
|
|
_estack = ORIGIN(RAM) + LENGTH(RAM) - 8;
|
|
_bootloader_dbl_tap = _estack;
|
|
|
|
/* define output sections */
|
|
SECTIONS
|
|
{
|
|
/* The program code and other data goes into FLASH */
|
|
.text :
|
|
{
|
|
. = ALIGN(4);
|
|
_sfixed = .;
|
|
KEEP(*(.vectors)) /* isr vector table */
|
|
*(.text) /* .text sections (code) */
|
|
*(.text*) /* .text* sections (code) */
|
|
*(.rodata) /* .rodata sections (constants, strings, etc.) */
|
|
*(.rodata*) /* .rodata* sections (constants, strings, etc.) */
|
|
|
|
. = ALIGN(4);
|
|
_etext = .; /* define a global symbol at end of code */
|
|
} >FLASH
|
|
|
|
.ARM.exidx :
|
|
{
|
|
*(.ARM.exidx*)
|
|
*(.gnu.linkonce.armexidx.*)
|
|
_sidata = .; /* This is used by the startup in order to initialize the .data section */
|
|
} > FLASH
|
|
|
|
/* This is the initialized data section
|
|
The program executes knowing that the data is in the RAM
|
|
but the loader puts the initial values in the FLASH (inidata).
|
|
It is one task of the startup to copy the initial values from FLASH to RAM. */
|
|
.data : AT ( _sidata )
|
|
{
|
|
. = ALIGN(4);
|
|
_srelocate = .; /* create a global symbol at data start; used by startup code in order to initialise the .data section in RAM */
|
|
*(.ramfunc)
|
|
*(.ramfunc*)
|
|
*(.data) /* .data sections */
|
|
*(.data*) /* .data* sections */
|
|
|
|
. = ALIGN(4);
|
|
_erelocate = .; /* define a global symbol at data end; used by startup code in order to initialise the .data section in RAM */
|
|
} >RAM
|
|
|
|
/* Uninitialized data section */
|
|
.bss :
|
|
{
|
|
. = ALIGN(4);
|
|
_sbss = .;
|
|
_szero = .; /* define a global symbol at bss start; used by startup code */
|
|
*(.bss)
|
|
*(.bss*)
|
|
*(COMMON)
|
|
|
|
. = ALIGN(4);
|
|
_ezero = .; /* define a global symbol at bss end; used by startup code */
|
|
_ebss = .;
|
|
} >RAM
|
|
|
|
/* this just checks there is enough RAM for a minimal stack */
|
|
.stack :
|
|
{
|
|
. = ALIGN(4);
|
|
. = . + 0x800; /* Reserve a minimum of 2K for the stack. */
|
|
. = ALIGN(4);
|
|
} >RAM
|
|
|
|
.ARM.attributes 0 : { *(.ARM.attributes) }
|
|
}
|