[support/ld] Factor out header from common_rom.inc, common_ram.inc.

The linker scripts share an initial section.  Factor this out into a
new file common_header.inc, and have the main linker scripts include
this file.  Apart from eliminating a redundancy, this will make it
easier to add new linker scripts in the future.

3 files changed, 48 insertions, 73 deletions

diff --git a/support/ld/common_header.inc b/support/ld/common_header.inc
new file mode 100644
index 0000000..ad1eca2
--- /dev/null
+++ b/support/ld/common_header.inc
@@ -0,0 +1,39 @@
+/* "Preamble" for linker scripts (such as common_rom.inc) */
+
+OUTPUT_FORMAT ("elf32-littlearm", "elf32-bigarm", "elf32-littlearm")
+ENTRY(_start)
+SEARCH_DIR(.)
+
+/*
+ * Link against libgcc, libc, and libm
+ */
+GROUP(libgcc.a libc.a libm.a)
+
+/* These force the linker to search for particular symbols from
+ * the start of the link process and thus ensure the user's
+ * overrides are picked up
+ */
+INCLUDE names.inc
+
+/* STM32 vector table. See stm32_vector_table.S  */
+EXTERN(__cs3_stm32_vector_table)
+
+/* libcs3 C start function. See cs3.h */
+EXTERN(__cs3_start_c)
+
+/* main entry point */
+EXTERN(main)
+
+/* Initial stack pointer value. */
+EXTERN(__cs3_stack)
+PROVIDE(__cs3_stack = __cs3_region_start_ram + __cs3_region_size_ram);
+
+/* Reset vector and chip reset entry point. See start.S */
+EXTERN(_start)
+PROVIDE(__cs3_reset = _start);
+
+/* Beginning of the heap */
+PROVIDE(__cs3_heap_start = _end);
+
+/* End of the heap */
+PROVIDE(__cs3_heap_end = __cs3_region_start_ram + __cs3_region_size_ram);
diff --git a/support/ld/common_ram.inc b/support/ld/common_ram.inc
index be83e84..0654e85 100644
--- a/support/ld/common_ram.inc
+++ b/support/ld/common_ram.inc
@@ -1,42 +1,10 @@
-/* Linker script for STM32 (by Lanchon with Mods by LeafLabs) */
-
-OUTPUT_FORMAT ("elf32-littlearm", "elf32-bigarm", "elf32-littlearm")
-SEARCH_DIR(.)
 /*
- * Link against libgcc, libc, and libm
- */
-GROUP(libgcc.a libc.a libm.a)
-
-/* These force the linker to search for particular symbols from
- * the start of the link process and thus ensure the user's
- * overrides are picked up
+ * Linker script for RAM builds.
+ *
+ * Original author "lanchon" from ST forums, with modifications by LeafLabs.
  */
-INCLUDE names.inc
-
-/* STM32 vector table. See stm32_vector_table.S  */
-EXTERN(__cs3_stm32_vector_table)
-
-/* libcs3 C start function. See cs3.h */
-EXTERN(__cs3_start_c)
-
-/* main entry point */
-EXTERN(main)
-
-/* Initial stack pointer value. */
-EXTERN(__cs3_stack)
-PROVIDE(__cs3_stack = __cs3_region_start_ram + __cs3_region_size_ram);
-
-/* Reset vector and chip reset entry point. See start.S */
-EXTERN(_start)
-ENTRY(_start)
-PROVIDE(__cs3_reset = _start);
-
-/* Beginning of the heap */
-PROVIDE(__cs3_heap_start = _end);
-
-/* End of the heap */
-PROVIDE(__cs3_heap_end = __cs3_region_start_ram + LENGTH(ram));
 
+INCLUDE common_header.inc
 
 SECTIONS
 {
diff --git a/support/ld/common_rom.inc b/support/ld/common_rom.inc
index e0c295f..ab3e760 100644
--- a/support/ld/common_rom.inc
+++ b/support/ld/common_rom.inc
@@ -1,42 +1,10 @@
-/* Linker script for STM32 (by Lanchon with Mods by LeafLabs) */
-
-OUTPUT_FORMAT ("elf32-littlearm", "elf32-bigarm", "elf32-littlearm")
-ENTRY(_start)
-SEARCH_DIR(.)
 /*
- * Link against libgcc, libc, and libm
- */
-GROUP(libgcc.a libc.a libm.a)
-
-/* These force the linker to search for particular symbols from
- * the start of the link process and thus ensure the user's
- * overrides are picked up
+ * Linker script for Flash (ROM) builds.
+ *
+ * Original author "lanchon" from ST forums, with modifications by LeafLabs.
  */
-INCLUDE names.inc
-
-/* STM32 vector table. See stm32_vector_table.S  */
-EXTERN(__cs3_stm32_vector_table)
-
-/* libcs3 C start function. See cs3.h */
-EXTERN(__cs3_start_c)
-
-/* main entry point */
-EXTERN(main)
-
-/* Initial stack pointer value. */
-EXTERN(__cs3_stack)
-PROVIDE(__cs3_stack = __cs3_region_start_ram + __cs3_region_size_ram);
-
-/* Reset vector and chip reset entry point. See start.S */
-EXTERN(_start)
-PROVIDE(__cs3_reset = _start);
-
-/* Beginning of the heap */
-PROVIDE(__cs3_heap_start = _end);
-
-/* End of the heap */
-PROVIDE(__cs3_heap_end = __cs3_region_start_ram + LENGTH(ram));
-
+ 
+INCLUDE common_header.inc
 
 SECTIONS
 {