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circuitpython/ports/atmel-samd/boards/common.template.ld

87 lines
3.0 KiB

/* Template for SAMD21/SAMD51 linking. dollar-sign-curly-bracket items are replaced with strings. */
/* Specify the memory areas */
MEMORY
{
FLASH_BOOTLOADER (rx): ORIGIN = ${BOOTLOADER_START_ADDR}, LENGTH = ${BOOTLOADER_SIZE}
FLASH_FIRMWARE (rx) : ORIGIN = ${CIRCUITPY_FIRMWARE_START_ADDR}, LENGTH = ${CIRCUITPY_FIRMWARE_SIZE}
FLASH_FILESYSTEM (r) : ORIGIN = ${CIRCUITPY_INTERNAL_FLASH_FILESYSTEM_START_ADDR}, LENGTH = ${CIRCUITPY_INTERNAL_FLASH_FILESYSTEM_SIZE}
FLASH_CONFIG (r) : ORIGIN = ${CIRCUITPY_INTERNAL_CONFIG_START_ADDR}, LENGTH = ${CIRCUITPY_INTERNAL_CONFIG_SIZE}
FLASH_NVM (r) : ORIGIN = ${CIRCUITPY_INTERNAL_NVM_START_ADDR}, LENGTH = ${CIRCUITPY_INTERNAL_NVM_SIZE}
RAM (xrw) : ORIGIN = 0x20000000, LENGTH = ${RAM_SIZE}
}
/* top end of the stack */
/* stack must be double-word (8 byte) aligned */
_estack = ORIGIN(RAM) + LENGTH(RAM) - 8;
_bootloader_dbl_tap = ORIGIN(RAM) + LENGTH(RAM) - 4;
/* 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);
} >FLASH_FIRMWARE
.ARM.exidx :
{
*(.ARM.exidx*)
*(.gnu.linkonce.armexidx.*)
_etext = .; /* define a global symbol at end of code */
_sidata = .; /* start of .data section */
} >FLASH_FIRMWARE
/* 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_FIRMWARE (inidata).
It is one task of the startup to copy the initial values from FLASH_FIRMWARE to RAM. */
.data : AT ( _sidata )
{
. = ALIGN(4);
_srelocate = .; /* create a global symbol at data start; used by startup code in order to initialize 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 initialize 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 the requested stack. */
.stack :
{
. = ALIGN(4);
. = . + ${CIRCUITPY_DEFAULT_STACK_SIZE};
. = ALIGN(4);
} >RAM
.ARM.attributes 0 : { *(.ARM.attributes) }
}