From 226fef1618dd9a37c050bb79a24c77396cd14c46 Mon Sep 17 00:00:00 2001
From: jaseg <git@jaseg.net>
Date: Sun, 11 Oct 2020 23:31:12 +0200
Subject: Initial fw commit

---
 fw/stm32_flash.ld | 136 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 136 insertions(+)
 create mode 100644 fw/stm32_flash.ld

(limited to 'fw/stm32_flash.ld')

diff --git a/fw/stm32_flash.ld b/fw/stm32_flash.ld
new file mode 100644
index 0000000..cba7577
--- /dev/null
+++ b/fw/stm32_flash.ld
@@ -0,0 +1,136 @@
+
+ENTRY(Reset_Handler)
+
+MEMORY {
+  FLASH (rx): ORIGIN = 0x08000000, LENGTH = 0x3C00
+  CONFIGFLASH (rw): ORIGIN = 0x08003C00, LENGTH = 0x400
+  RAM (xrw):  ORIGIN = 0x20000000, LENGTH = 4K
+}
+
+/* highest address of the user mode stack */
+_estack = 0x20001000;
+
+SECTIONS {
+    /* for Cortex devices, the beginning of the startup code is stored in the .isr_vector section, which goes to FLASH */
+    .isr_vector : {
+	. = ALIGN(4);
+        KEEP(*(.isr_vector))            /* Startup code */
+	. = ALIGN(4);
+    } >FLASH
+    
+    /* the program code is stored in the .text section, which goes to Flash */
+    .text : {
+	    . = ALIGN(4);
+	    
+        *(.text)                   /* normal code */
+        *(.text.*)                 /* -ffunction-sections code */
+        *(.rodata)                 /* read-only data (constants) */
+        *(.rodata*)                /* -fdata-sections read only data */
+        *(.glue_7)                 /* TBD - needed ? */
+        *(.glue_7t)                /* TBD - needed ? */
+
+        *(.source_tarball)
+
+        /* Necessary KEEP sections (see http://sourceware.org/ml/newlib/2005/msg00255.html) */
+        KEEP (*(.init))
+        KEEP (*(.fini))
+        KEEP (*(.source_tarball))
+
+	    . = ALIGN(4);
+        _etext = .;
+	    /* This is used by the startup in order to initialize the .data section */
+        _sidata = _etext;
+    } >FLASH
+
+    /*
+    .configflash : {
+        . = ALIGN(0x400);
+        *(.configdata)
+        _econfig = .;
+    } >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);
+        /* This is used by the startup in order to initialize the .data secion */
+        _sdata = . ;
+        _data = . ;
+        
+        *(.data)
+        *(.data.*)
+        *(.RAMtext)
+
+	    . = ALIGN(4);
+	    /* This is used by the startup in order to initialize the .data secion */
+   	    _edata = . ;
+    } >RAM
+    
+    /* This is the uninitialized data section */
+    .bss : {
+	    . = ALIGN(4);
+        /* This is used by the startup in order to initialize the .bss secion */
+        _sbss = .;
+        _bss = .;
+        
+        *(.bss)
+        *(.bss.*) /* patched by elias - allows the use of -fdata-sections */
+        *(COMMON)
+        
+	    . = ALIGN(4);
+	    /* This is used by the startup in order to initialize the .bss secion */
+   	 _ebss = . ;
+    } >RAM
+    
+    PROVIDE ( end = _ebss);
+    PROVIDE (_end = _ebss);
+    
+    __exidx_start = .;
+    __exidx_end = .;
+    
+    /* after that it's only debugging information. */
+    
+    /* remove the debugging information from the standard libraries */
+/*    /DISCARD/ : {
+        libc.a ( * )
+        libm.a ( * )
+        libgcc.a ( * )
+    }*/
+
+    /* Stabs debugging sections.  */
+    .stab          0 : { *(.stab) }
+    .stabstr       0 : { *(.stabstr) }
+    .stab.excl     0 : { *(.stab.excl) }
+    .stab.exclstr  0 : { *(.stab.exclstr) }
+    .stab.index    0 : { *(.stab.index) }
+    .stab.indexstr 0 : { *(.stab.indexstr) }
+    .comment       0 : { *(.comment) }
+    /* DWARF debug sections.
+       Symbols in the DWARF debugging sections are relative to the beginning
+       of the section so we begin them at 0.  */
+    /* DWARF 1 */
+    .debug          0 : { *(.debug) }
+    .line           0 : { *(.line) }
+    /* GNU DWARF 1 extensions */
+    .debug_srcinfo  0 : { *(.debug_srcinfo) }
+    .debug_sfnames  0 : { *(.debug_sfnames) }
+    /* DWARF 1.1 and DWARF 2 */
+    .debug_aranges  0 : { *(.debug_aranges) }
+    .debug_pubnames 0 : { *(.debug_pubnames) }
+    /* DWARF 2 */
+    .debug_info     0 : { *(.debug_info .gnu.linkonce.wi.*) }
+    .debug_abbrev   0 : { *(.debug_abbrev) }
+    .debug_line     0 : { *(.debug_line) }
+    .debug_frame    0 : { *(.debug_frame) }
+    .debug_str      0 : { *(.debug_str) }
+    .debug_loc      0 : { *(.debug_loc) }
+    .debug_macinfo  0 : { *(.debug_macinfo) }
+    /* SGI/MIPS DWARF 2 extensions */
+    .debug_weaknames 0 : { *(.debug_weaknames) }
+    .debug_funcnames 0 : { *(.debug_funcnames) }
+    .debug_typenames 0 : { *(.debug_typenames) }
+    .debug_varnames  0 : { *(.debug_varnames) }
+}
-- 
cgit