Initial commit

arm7/source/crt0.s

@@ -0,0 +1,26 @@
+.section ".crt0", "ax"
+.arm
+
+.global _start
+.type _start, %function
+_start:
+    // disable irqs
+    ldr r0,= 0x04000208
+    strb r0, [r0]
+    // clear bss
+    ldr r0,= __bss_start
+    ldr r1,= __bss_end
+    cmp r0, r1
+    beq bss_done
+    mov r2, #0
+1:
+    str r2, [r0], #4
+    cmp r0, r1
+    bne 1b
+bss_done:
+    ldr sp,= 0x0380FD80
+    b loaderMain
+
+.pool
+
+.end