Add Chapter2

Author: valentis

Chapter2/a.txt

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+Hello World
+Hello World
+hello world

Chapter2/c.txt

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+#ifndef __COMMON_H__
+#define __COMMON_H__
+
+extern void print(char* str);
+extern char* input( );
+
+#endif /* __COMMON_H__ */

Chapter2/common.h

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+txt

Chapter2/e.txt

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+#include <stdio.h>
+
+int main(int argc, char** argv)
+{
+    printf("Hello, World!\n");
+
+    return 0;
+}

Chapter2/helloworld.c

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+	.arch armv6
+	.eabi_attribute 28, 1
+	.eabi_attribute 20, 1
+	.eabi_attribute 21, 1
+	.eabi_attribute 23, 3
+	.eabi_attribute 24, 1
+	.eabi_attribute 25, 1
+	.eabi_attribute 26, 2
+	.eabi_attribute 30, 6
+	.eabi_attribute 34, 1
+	.eabi_attribute 18, 4
+	.file	"helloworld.c"
+	.text
+	.section	.rodata
+	.align	2
+.LC0:
+	.ascii	"Hello, World!\000"
+	.text
+	.align	2
+	.global	main
+	.arch armv6
+	.syntax unified
+	.arm
+	.fpu vfp
+	.type	main, %function
+main:
+	@ args = 0, pretend = 0, frame = 8
+	@ frame_needed = 1, uses_anonymous_args = 0
+	push	{fp, lr}
+	add	fp, sp, #4
+	sub	sp, sp, #8
+	str	r0, [fp, #-8]
+	str	r1, [fp, #-12]
+	ldr	r0, .L3
+	bl	puts
+	mov	r3, #0
+	mov	r0, r3
+	sub	sp, fp, #4
+	@ sp needed
+	pop	{fp, pc}
+.L4:
+	.align	2
+.L3:
+	.word	.LC0
+	.size	main, .-main
+	.ident	"GCC: (Raspbian 8.3.0-6+rpi1) 8.3.0"
+	.section	.note.GNU-stack,"",%progbits

Chapter2/helloworld.s

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+#include <stdio.h>
+#include <stdlib.h>
+#include "common.h"
+
+char* input( )
+{
+    char *str;
+    str = (char*)malloc(BUFSIZ);
+    scanf("%s", str);
+
+    return str;
+}

Chapter2/input.c

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+#include "common.h"
+
+int main( )
+{
+    char* str = input( );
+    print(str);
+    print("\n");
+
+    return 0;
+}

Chapter2/main.c

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+# makefile
+.SUFFIXES : .c .o
+
+OBJECTS = main.o \
+	  print.o \
+	  input.o
+SRCS = $(OBJECTS:.o=.c)
+
+CC = gcc
+CFLAGS = -g
+TARGET = test helloworld
+
+all : $(TARGET)
+helloworld : helloworld.c
+	$(CC) -o $@ $<
+
+test : $(OBJECTS)
+	$(CC) -o $@ $(OBJECTS)
+
+clean :
+	$(RM) $(OBJECTS) $(TARGET) helloworld.o core
+
+main.o : main.c common.h
+print.o : print.c common.h
+input.o : input.c common.h

Chapter2/makefile

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+test :
+	gcc -o test main.c print.c input.c