Move hang func to separate module

build.sh

@@ -9,13 +9,13 @@ CROSS="$BIN/i386-elf-"
 STAGE1_LDFLAGS='--defsym=program_start=0x7c00'
 STAGE2_LDFLAGS='--defsym=program_start=0x7e00'
 
-STAGE1_OBJS="$SRC/header.o $SRC/print.o $SRC/stage1.o"
-STAGE2_OBJS="$SRC/header.o $SRC/print.o $SRC/stage2.o"
+STAGE1_OBJS="$SRC/header.o $SRC/common.o $SRC/stage1.o"
+STAGE2_OBJS="$SRC/header.o $SRC/common.o $SRC/stage2.o"
 
 ./clean.sh
 
 ${CROSS}gcc -c $SRC/header.S -o $SRC/header.o
-${CROSS}gcc -c $SRC/print.S  -o $SRC/print.o
+${CROSS}gcc -c $SRC/common.S -o $SRC/common.o
 ${CROSS}gcc -c $SRC/stage1.S -o $SRC/stage1.o
 ${CROSS}gcc -c $SRC/stage2.S -o $SRC/stage2.o
 

src/x86/common.S

@@ -3,10 +3,16 @@
 #endif
 
 .code16
+.global hang
 .global print_char
 .global print_str
 
 .section .text
+hang:
+    cli
+    hlt
+    jmp hang
+
 do_ret:
     ret
 

src/x86/stage1.S

@@ -8,6 +8,7 @@
 
 .code16
 .global _start
+.extern hang
 .extern print_str
 
 .section .rodata
@@ -117,11 +118,7 @@ read_loop:
 
 finish:
     ljmp $0, $STAGE2_BASE
-
-hang:
-    cli
-    hlt
-    jmp hang
+    ljmp $0, $hang
 
 do_ret:
     ret

src/x86/stage2.S

@@ -41,8 +41,4 @@ teststr4: .string "Test string from sector 4\r\n"
 sector4:
     mov $hello4, %si
     call print_str
-
-hang:
-    cli
-    hlt
-    jmp hang
+    ljmp $0, $hang