合成img文件的时候 losetup 分区在脚本里面没有做， 需要先手动搞一波
losetup -o 0 --sizelimit 1073741824 /dev/loop70 output/rootfs/rootfs.img -P
sfdisk /dev/loop70
/dev/loop70p1 : start= 2048, size= 196608, type=c
/dev/loop70p2 : start= 198656, size= 1898496, type=83

mkfs.vfat /dev/loop70p1
mkfs.ext4 /dev/loop70p2

在文件./build.sh中，有以下几条路径

GLIB_ELF_CROSS_COMPILE_DIR=/opt/gcc-riscv64-unknown-linux-gnu
GLIB_ELF_CROSS_PREFIX=$GLIB_ELF_CROSS_COMPILE_DIR/bin/riscv64-unknown-linux-gnu
GLIB_ELF_CROSS_PREFIX_SYSROOT_DIR=$GLIB_ELF_CROSS_COMPILE_DIR/sysroot
NEWLIB_ELF_CROSS_COMPILE_DIR=/home/tc/Desktop/riscv-tool/riscv/
NEWLIB_ELF_CROSS_PREFIX=$NEWLIB_ELF_CROSS_COMPILE_DIR/bin/riscv64-unknown-elf

我在文档中没有找到对应的编译器安装路径的描述，也去官方的仓库（ch22章节提到了换源码编译工具）尝试自己编译源码看看能不能出现对应的文件夹，但是仓库中包含的子仓库太大，导致没法下载，甚至因此自己搭了个vps，但是很遗憾，有一些子库好像并未开放，没法完全clone下来。
我想问问您是怎么将仓库clone下来的？
下面是clone报错代码

Cloning into '/home/tc/Desktop/riscv-gnu-toolchain/musl'...
fatal: remote error: access denied or repository not exported: /git/musl
fatal: clone of 'git://git.musl-libc.org/git/musl' into submodule path '/home/tc/Desktop/riscv-gnu-toolchain/musl' failed
Failed to clone 'musl'. Retry scheduled
Cloning into '/home/tc/Desktop/riscv-gnu-toolchain/pk'...
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.
fatal: clone of 'git://github.com/riscv-software-src/riscv-pk.git' into submodule path '/home/tc/Desktop/riscv-gnu-toolchain/pk' failed
Failed to clone 'pk'. Retry scheduled
Cloning into '/home/tc/Desktop/riscv-gnu-toolchain/qemu'...
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.
fatal: clone of 'git://gitlab.com/qemu-project/qemu.git' into submodule path '/home/tc/Desktop/riscv-gnu-toolchain/qemu' failed
Failed to clone 'qemu'. Retry scheduled
Cloning into '/home/tc/Desktop/riscv-gnu-toolchain/spike'...
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.
fatal: clone of 'git://github.com/riscv-software-src/riscv-isa-sim.git' into submodule path '/home/tc/Desktop/riscv-gnu-toolchain/spike' failed
Failed to clone 'spike'. Retry scheduled
Cloning into '/home/tc/Desktop/riscv-gnu-toolchain/musl'...
fatal: remote error: access denied or repository not exported: /git/musl
fatal: clone of 'git://git.musl-libc.org/git/musl' into submodule path '/home/tc/Desktop/riscv-gnu-toolchain/musl' failed
Failed to clone 'musl' a second time, aborting

可以加个微信吗？ 我在工作中也开始使用qemu，我不会问一些显而易见或者动动手就能在网上搜到的问题，我觉得你做这一件事很酷。

作者你好，我在移植sudo的时候遇到了以下问题，请问应该怎么解决
-bash-5.2$ sudo ls

We trust you have received the usual lecture from the local System
Administrator. It usually boils down to these three things:

#1) Respect the privacy of others.
#2) Think before you type.
#3) With great power comes great responsibility.

For security reasons, the password you type will not be visible.

Password:
Sorry, try again.
Password:
Sorry, try again.
Password:
sudo: 3 incorrect password attempts
-bash-5.2$ xqemu: terminating on signal 2

作者您好，我在学习您的ch9的时候遇到了一些问题，现象是build.sh可以编译，但是qemu的所有串口均无打印，我在lowlevelboot的start.S中手动添加了一些打印log的语句，发现这些语句能在serial3中产生输出。
个人怀疑原因可能是opensbi或者uboot未能成功加载
不知道您那边是否遇到过这种情况

最近有社区朋友读到我的博客后通过邮件向我咨询了一个问题，特此提单记录下。

在配置can网络时出现如下错误。

编译 lowlevelboot 时 用的是 riscv64-unknown-elf 工具链

unknown 这个 工具链 应该 不认识 C库,

然后我在 archlinux 上高了一个 riscv64-unknown-elf 工具链 编译 ,果然报错了

另外 教程ch4一节 是去 https://toolchains.bootlin.com/ 下载的 工具链 , 下载的也是 glibc 的版本 (认识 C库)

--audio-drv-list=pa,alsa,sdl,oss

pa 应该是 PulseAudio , 我似乎已经装了

 sudo apt install pulseaudio
Reading package lists... Done
Building dependency tree
Reading state information... Done
pulseaudio is already the newest version (1:13.99.1-1ubuntu3.14).
The following package was automatically installed and is no longer required:
  libfwupdplugin1
Use 'sudo apt autoremove' to remove it.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
R :: code/quard_star_tutorial »

但还是会出错

../meson.build:1405:6: ERROR: Problem encountered: Audio driver "pa" not available.

在.c 和 .h 里面都include了

In the macos, use the full-screen parameter in run.sh does not work as expected。

hi, when i use ./build.sh trusted_domain, i got this error:

CC lseek.o
CC fstat.o
CC sbrk.o
CC sbi.o
CC it.o
CC main.o
AS startup.o
AS portASM.o
LD trusted_fw.elf
/opt/gcc-riscv64-unknown-elf/bin/../lib/gcc/riscv64-unknown-elf/12.2.0/../../../../riscv64-unknown-elf/bin/ld: warning: build/trusted_fw.elf has a LOAD segment with RWX permissions
/opt/gcc-riscv64-unknown-elf/bin/../lib/gcc/riscv64-unknown-elf/12.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-svfprintf.o): in function _svfprintf_r': vfprintf.c:(.text._svfprintf_r+0x68): relocation truncated to fit: R_RISCV_HI20 against .L20'
/opt/gcc-riscv64-unknown-elf/bin/../lib/gcc/riscv64-unknown-elf/12.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-ldtoa.o): in function .L298': ldtoa.c:(.text.ediv+0x64): relocation truncated to fit: R_RISCV_HI20 against ezero'
/opt/gcc-riscv64-unknown-elf/bin/../lib/gcc/riscv64-unknown-elf/12.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-ldtoa.o): in function .L415': ldtoa.c:(.text.emul+0x66): relocation truncated to fit: R_RISCV_HI20 against ezero'
/opt/gcc-riscv64-unknown-elf/bin/../lib/gcc/riscv64-unknown-elf/12.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-ldtoa.o): in function .L534': ldtoa.c:(.text._ldtoa_r+0xe8): relocation truncated to fit: R_RISCV_HI20 against eone'
/opt/gcc-riscv64-unknown-elf/bin/../lib/gcc/riscv64-unknown-elf/12.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-assert.o): in function __assert_func': assert.c:(.text.__assert_func+0x1a): relocation truncated to fit: R_RISCV_HI20 against .LC0'
/opt/gcc-riscv64-unknown-elf/bin/../lib/gcc/riscv64-unknown-elf/12.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-locale.o): in function __locale_mb_cur_max': locale.c:(.text.__locale_mb_cur_max+0x0): relocation truncated to fit: R_RISCV_HI20 against symbol __global_locale' defined in .data.__global_locale section in /opt/gcc-riscv64-unknown-elf/bin/../lib/gcc/riscv64-unknown-elf/12.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-locale.o)
/opt/gcc-riscv64-unknown-elf/bin/../lib/gcc/riscv64-unknown-elf/12.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-vfiprintf.o): in function .L28': vfprintf.c:(.text._vfiprintf_r+0x6a): relocation truncated to fit: R_RISCV_HI20 against .L46'
/opt/gcc-riscv64-unknown-elf/bin/../lib/gcc/riscv64-unknown-elf/12.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-fini.o): in function __libc_fini_array': fini.c:(.text.__libc_fini_array+0x4): relocation truncated to fit: R_RISCV_HI20 against symbol __fini_array_start' defined in .text section in build/trusted_fw.elf
/opt/gcc-riscv64-unknown-elf/bin/../lib/gcc/riscv64-unknown-elf/12.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-init.o): in function __libc_init_array': init.c:(.text.__libc_init_array+0x4): relocation truncated to fit: R_RISCV_HI20 against symbol __preinit_array_end' defined in .text section in build/trusted_fw.elf
/opt/gcc-riscv64-unknown-elf/bin/../lib/gcc/riscv64-unknown-elf/12.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-freer.o): in function _malloc_trim_r': mallocr.c:(.text._malloc_trim_r+0x4): relocation truncated to fit: R_RISCV_HI20 against symbol _malloc_av' defined in .data._malloc_av section in /opt/gcc-riscv64-unknown-elf/bin/../lib/gcc/riscv64-unknown-elf/12.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-mallocr.o)
/opt/gcc-riscv64-unknown-elf/bin/../lib/gcc/riscv64-unknown-elf/12.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-freer.o): in function `_free_r':
mallocr.c:(.text._free_r+0x1c): 从输出所省略的额外重寻址溢出
collect2: error: ld returned 1 exit status
make: *** [Makefile:151：build/trusted_fw.elf] 错误 1

The other ./build cmds work fine.
my OS is ubuntun 20.04
riscv compiler is:

• riscv64-elf-ubuntu-20.04-nightly-2023.02.25-nightly.tar.gz
• riscv64-glibc-ubuntu-20.04-nightly-2023.02.25-nightly.tar.gz