adds signature to start of firmware

2024-08-11 17:29:13 +02:00 · 2024-08-11 17:29:13 +02:00 · 46d55f353e
commit 46d55f353e
parent d621264ef7
1 changed files with 8 additions and 3 deletions
--- a/env/start.S
+++ b/env/start.S
@ -7,12 +7,17 @@
 _start:
 .option push
 .option norelax
-    la gp, trap_entry
-    csrw mtvec, gp
+.option norvc
+	j 1f
+	.2byte	0x4e4d
+	.2byte	0x5352
+	.4byte  0x669
+1:
    la gp, __global_pointer$
 .option pop
 	la sp, _sp
-
+    la t0, trap_entry
+    csrw mtvec, t0
 	/* Load data section */
 	la a0, _data_lma
 	la a1, _data