Check r0 and r1 too for firm0 detection

2017-08-11 23:52:59 +02:00 · 2017-08-11 23:52:59 +02:00 · 49c0ab65df
commit 49c0ab65df
parent 8f9c1305e4
1 changed files with 4 additions and 2 deletions
--- a/source/start.s
+++ b/source/start.s
@ -31,9 +31,11 @@ _start:
    orr r4, #0x1C0
    msr cpsr_cxsf, r4

-    @ Check if r2 is 0 (r0-sp are supposed to be 0), and for regions 0, 5 and 7 of the MPU config
+    @ Check if r0-r2 are 0 (r0-sp are supposed to be 0), and for regions 0, 5 and 7 of the MPU config
    @ This is not foolproof but should work well enough
-    cmp r2, #0
+    cmp r0, #0
+    cmpeq r1, #0
+    cmpeq r2, #0
    ldreq r4, =0x20000035
    mrceq p15, 0, r5, c6, c0, 0
    cmpeq r4, r5