work on chapter 2

chapter_2/linkscript.ld

@@ -0,0 +1,8 @@
+ENTRY(_Reset)
+
+SECTIONS
+{
+    . = 0x0;
+    .text : { startup.o (.vector_table) *(.text) } 
+    . = ALIGN(8);
+}

chapter_2/startup.s

@@ -1,5 +1,17 @@
-str1: .word 0xDEADBEEF
-ldr r2,str1                 
-b .                         
+.section .vector_table, "x"
+.global _Reset
+_Reset:
+    b Reset_Handler
+    b . /* 0x4  Undefined Instruction */
+    b . /* 0x8  Software Interrupt */
+    b . /* 0xC  Prefetch Abort */
+    b . /* 0x10 Data Abort */
+    b . /* 0x14 Reserved */
+    b . /* 0x18 IRQ */
+    b . /* 0x1C FIQ */
 
-   
+.section .text
+Reset_Handler:
+    ldr r2, str1
+    b .
+    str1: .word 0xDEADBEEF