added licensing

1 files changed, 82 insertions, 162 deletions

diff --git a/link.ld b/link.ld
index 4819a3c..be1c523 100644
--- a/link.ld
+++ b/link.ld
@@ -1,162 +1,82 @@
-/*

-*****************************************************************************

-**

-

-**  File        : LinkerScript.ld

-**

-**  Abstract    : Linker script for STM32L476RGTx Device with

-**                1024KByte FLASH, 96KByte RAM

-**

-**                Set heap size, stack size and stack location according

-**                to application requirements.

-**

-**                Set memory bank area and size if external memory is used.

-**

-**  Target      : STMicroelectronics STM32

-**

-**

-**  Distribution: The file is distributed as is, without any warranty

-**                of any kind.

-**

-**  (c)Copyright Ac6.

-**  You may use this file as-is or modify it according to the needs of your

-**  project. Distribution of this file (unmodified or modified) is not

-**  permitted. Ac6 permit registered System Workbench for MCU users the

-**  rights to distribute the assembled, compiled & linked contents of this

-**  file as part of an application binary file, provided that it is built

-**  using the System Workbench for MCU toolchain.

-**

-*****************************************************************************

-*/

-

-/* Entry Point */

-ENTRY(Reset_Handler)

-

-/* Highest address of the user mode stack */

-_estack = 0x20018000;    /* end of RAM */

-

-/* Specify the memory areas */

-MEMORY

-{

-	FLASH (rx)	: ORIGIN = 0x8000000,	LENGTH = 1024K

-	RAM   (xrw)	: ORIGIN = 0x20000000,	LENGTH = 96K

-}

-

-/* Define output sections */

-SECTIONS

-{

-  /* The startup code goes first into FLASH */

-  .isr_vector :

-  {

-    . = ALIGN(8);

-    KEEP(*(.isr_vector)) /* Startup code */

-    . = ALIGN(8);

-  } >FLASH

-

-  /* The program code and other data goes into FLASH */

-  .text :

-  {

-    . = ALIGN(8);

-    *(.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(8);

-    _etext = .;        /* define a global symbols at end of code */

-  } >FLASH

-

-  /* Constant data goes into FLASH */

-  .rodata :

-  {

-    . = ALIGN(8);

-    *(.rodata)         /* .rodata sections (constants, strings, etc.) */

-    *(.rodata*)        /* .rodata* sections (constants, strings, etc.) */

-    . = ALIGN(8);

-  } >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(8);

-    _sdata = .;        /* create a global symbol at data start */

-    *(.data)           /* .data sections */

-    *(.data*)          /* .data* sections */

-

-    . = ALIGN(8);

-    _edata = .;        /* define a global symbol at data end */

-  } >RAM 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(8);

-    *(._user_heap_stack)

-    . = ALIGN(8);

-  } >RAM

-

-  

-

-  /* Remove information from the standard libraries */

-  /DISCARD/ :

-  {

-    libc.a ( * )

-    libm.a ( * )

-    libgcc.a ( * )

-  }

-

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

-}

-

+/**
+ * @file linker.ld
+ *
+ * Copyright (C) 2018 Clyne Sullivan
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+/* enter at the reset handler */
+ENTRY(Reset_Handler)
+
+/* description of memory regions */
+MEMORY {
+	FLASH (rx) : ORIGIN = 0x08000000, LENGTH = 1024K
+	RAM (rwx)  : ORIGIN = 0x20000000,  LENGTH = 96K
+}
+
+/* description of ELF sections */
+SECTIONS {
+	/* keep startup code at beginning */
+	.isr_vector : {
+		. = ALIGN(8);
+		KEEP(*(.isr_vector))
+		. = ALIGN(8);
+	} > FLASH
+
+	/* code sections */
+	.text : {
+		. = ALIGN(8);
+		*(.text)
+		. = ALIGN(8);
+	} > FLASH
+
+	/* readonly data */
+	.rodata : {
+		. = ALIGN(8);
+		*(.rodata)
+		. = ALIGN(8);
+	} > FLASH
+
+	/* init_array/fini_array (TODO understand this) */
+	.init_array : {
+		PROVIDE_HIDDEN(__init_array_start = .);
+		KEEP(*(.init_array))
+		PROVIDE_HIDDEN(__init_array_end = .);
+	} > FLASH
+
+	.fini_array : {
+		PROVIDE_HIDDEN(__fini_array_start = .);
+		KEEP(*(.fini_array))
+		PROVIDE_HIDDEN(__fini_array_end = .);
+	} > FLASH
+
+	/* initialized data */
+	_sidata = LOADADDR(.data);
+	.data : {
+		. = ALIGN(8);
+		_sdata = .;
+		*(.data)
+		. = ALIGN(8);
+		_edata = .;
+	} > RAM AT > FLASH
+
+	/* uninitialized data */
+	.bss : {
+		. = ALIGN(8);
+		__bss_start__ = .;
+		*(.bss)
+		__bss_end__ = .;
+	} > RAM
+}