第10章的程序无法正确执行

[PragmaTwice]

在使用以下命令编译运行第10章时

sudo make
sudo make qemu

grub 选中操作系统后显示如下，并停滞在此界面：

objdump 输出：

$ objdump -h hx_kernel 

hx_kernel:     file format elf32-i386

section:
Idx Name          Size      VMA       LMA       File off  Algn
  0 .init.text    00001000  00100000  00100000  00001000  2**0
                  CONTENTS, ALLOC, LOAD, READONLY, CODE
  1 .init.data    00001000  00101000  00101000  00002000  2**2
                  CONTENTS, ALLOC, LOAD, DATA
  2 .text         00003000  c0102000  00102000  00003000  2**4
                  CONTENTS, ALLOC, LOAD, READONLY, CODE
  3 .text.__x86.get_pc_thunk.ax 00000004  c0105000  00105000  00006000  2**0
                  CONTENTS, ALLOC, LOAD, READONLY, CODE
  4 .text.__x86.get_pc_thunk.bx 00000004  c0105004  00105004  00006004  2**0
                  CONTENTS, ALLOC, LOAD, READONLY, CODE
  5 .note.gnu.property 0000001c  c0105008  00105008  00006008  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  6 .data         00000fdc  c0105024  00105024  00006024  2**2
                  CONTENTS, ALLOC, LOAD, DATA
  7 .got.plt      0000000c  c0106000  00106000  00007000  2**2
                  CONTENTS, ALLOC, LOAD, DATA
  8 .bss          00105020  c0107000  00107000  0000700c  2**12
                  ALLOC
  9 .stab         00005fe0  c020c020  0020c020  0010d020  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
 10 .stabstr      00002000  c0212000  00212000  00113000  2**0
                  CONTENTS, ALLOC, LOAD, READONLY, DATA

环境：

$ gcc --version
gcc (GCC) 8.2.1 20181127

$ ld --version
GNU ld (GNU Binutils) 2.31.1

$ nasm --version
NASM version 2.14 compiled on Nov 15 2018

$ uname -a
Linux TwicesManjaro 4.19.16-1-MANJARO #1 SMP PREEMPT Fri Jan 18 17:03:05 UTC 2019 x86_64 GNU/Linux

[PragmaTwice]

将 GCC 从 8.2 换为 4.9 后问题解决..

目前并不清楚具体原因。