rp2040

commit 6b5151a303ab990352589a5482404ab008275301
parent e4ee2a4f2aa48bedc8b6f24024117920d2b67d84
Author: Matsuda Kenji <info@mtkn.jp>
Date:   Mon, 10 Apr 2023 09:40:37 +0900

use sram_base to fetch initial sp

Diffstat:
M
mach.s
 | 
9
+++++----
M
memmap.ld
 | 
1
+

2 files changed, 6 insertions(+), 4 deletions(-)
diff --git a/mach.s b/mach.s
@@ -1,12 +1,13 @@
 	.section .vectors
-__vectors:
-.word 0x20040000
-.word reset
+vectors:
+	.word 0x20040000 // initial SP
+	.word reset      // entry point
 
 	.section .text
 	.thumb_func
 reset:
-	ldr r0, =0x20040000
+	ldr r0, sram_base
+	ldr r0, [r0, #0]
 	mov sp, r0
 	bl main
 
diff --git a/memmap.ld b/memmap.ld
@@ -13,6 +13,7 @@ SECTIONS
 	.text 0x20000000 : AT (0x10000100) {
 		*(.vectors)
 		*(.text)
+		_etext = .;
 	}
 }