X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=blobdiff_plain;f=src%2Fstm%2Faltos.ld;h=3106cc3b7ca83dcc6b3e54600ad039abb2884324;hp=f78a45d677e335570a735097c621903939b792b6;hb=0dec7d0885970a7d73468dd77220bae78e161b40;hpb=a5d873d47b3b16ca32559b4de668bf07b25eddb0

diff --git a/src/stm/altos.ld b/src/stm/altos.ld
index f78a45d6..3106cc3b 100644
--- a/src/stm/altos.ld
+++ b/src/stm/altos.ld
@@ -16,8 +16,9 @@
  */
 
 MEMORY {
-	rom (rx) : ORIGIN = 0x08000000, LENGTH = 128K
-	ram (!w) : ORIGIN = 0x20000000, LENGTH = 16K
+	rom (rx) : ORIGIN = 0x08001000, LENGTH = 124K
+	ram (!w) : ORIGIN = 0x20000000, LENGTH = 15872
+	stack (!w) : ORIGIN = 0x20003e00, LENGTH = 512
 }
 
 INCLUDE registers.ld
@@ -35,9 +36,19 @@ SECTIONS {
 
 		. = ORIGIN(rom) + 0x100;
 
+
+		/* Ick. What I want is to specify the
+		 * addresses of some global constants so
+		 * that I can find them across versions
+		 * of the application. I can't figure out
+		 * how to make gnu ld do that, so instead
+		 * we just load the two files that include
+		 * these defines in the right order here and
+		 * expect things to 'just work'. Don't change
+		 * the contents of those files, ok?
+		 */
 		ao_romconfig.o(.romconfig*)
 		ao_product.o(.romconfig*)
-
 		*(.text*)	/* Executable code */
 		*(.rodata*)	/* Constants */
 
@@ -45,26 +56,40 @@ SECTIONS {
 
 	.ARM.exidx : {
 		*(.ARM.exidx* .gnu.linkonce.armexidx.*)
-		__text_end__ = .;
 	} > rom
+	__text_end__ = .;
+
+	/* Boot data which must live at the start of ram so that
+	 * the application and bootloader share the same addresses.
+	 * This must be all uninitialized data
+	 */
+	.boot (NOLOAD) : {
+		__boot_start__ = .;
+		*(.boot)
+		. = ALIGN(4);
+		__boot_end__ = .;
+	} >ram
 
 	/* Data -- relocated to RAM, but written to ROM
 	 */
-	.data ORIGIN(ram) : AT (ADDR(.ARM.exidx) + SIZEOF (.ARM.exidx)) {
+	.data : {
 		__data_start__ = .;
 		*(.data)	/* initialized data */
+		. = ALIGN(4);
 		__data_end__ = .;
-		__bss_start__ = .;
-	} >ram
+	} >ram AT>rom
 
 	.bss : {
+		__bss_start__ = .;
 		*(.bss)
 		*(COMMON)
+		. = ALIGN(4);
 		__bss_end__ = .;
 	} >ram
 
-	PROVIDE(__stack__ = ORIGIN(ram) + LENGTH(ram));
 	PROVIDE(end = .);
+
+	PROVIDE(__stack__ = ORIGIN(stack) + LENGTH(stack));
 }
 
 ENTRY(start);