[PATCH v2 -next] docs/zh_CN: Add dev-tools/gdb-kernel-debugging.rst Chinese translation

gaochao posted 1 patch 1 week, 2 days ago
.../zh_CN/dev-tools/gdb-kernel-debugging.rst  | 167 ++++++++++++++++++
.../translations/zh_CN/dev-tools/index.rst    |   2 +-
2 files changed, 168 insertions(+), 1 deletion(-)
create mode 100644 Documentation/translations/zh_CN/dev-tools/gdb-kernel-debugging.rst
[PATCH v2 -next] docs/zh_CN: Add dev-tools/gdb-kernel-debugging.rst Chinese translation
Posted by gaochao 1 week, 2 days ago
Translate dev-tools/gdb-kernel-debugging.rst into Chinese.

Signed-off-by: gaochao <gaochao49@huawei.com>
Reviewed-by: Yanteng Si <siyanteng@loongson.cn>
Reviewed-by: Wu XiangCheng <bobwxc@email.cn>
---
v2:
- change : to ::
- change 使能 to 开启
---
 .../zh_CN/dev-tools/gdb-kernel-debugging.rst  | 167 ++++++++++++++++++
 .../translations/zh_CN/dev-tools/index.rst    |   2 +-
 2 files changed, 168 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/translations/zh_CN/dev-tools/gdb-kernel-debugging.rst

diff --git a/Documentation/translations/zh_CN/dev-tools/gdb-kernel-debugging.rst b/Documentation/translations/zh_CN/dev-tools/gdb-kernel-debugging.rst
new file mode 100644
index 000000000000..17b5ce85a90c
--- /dev/null
+++ b/Documentation/translations/zh_CN/dev-tools/gdb-kernel-debugging.rst
@@ -0,0 +1,167 @@
+.. highlight:: none
+
+.. include:: ../disclaimer-zh_CN.rst
+
+:Original: Documentation/dev-tools/gdb-kernel-debugging.rst
+:Translator: 高超 gao chao <gaochao49@huawei.com>
+
+通过gdb调试内核和模块
+=====================
+
+Kgdb内核调试器、QEMU等虚拟机管理程序或基于JTAG的硬件接口,支持在运行时使用gdb
+调试Linux内核及其模块。Gdb提供了一个强大的python脚本接口,内核也提供了一套
+辅助脚本以简化典型的内核调试步骤。本文档为如何启用和使用这些脚本提供了一个简要的教程。
+此教程基于QEMU/KVM虚拟机,但文中示例也适用于其他gdb stub。
+
+
+环境配置要求
+------------
+
+- gdb 7.2+ (推荐版本: 7.4+) 且开启python支持 (通常发行版上都已支持)
+
+设置
+----
+
+- 创建一个QEMU/KVM的linux虚拟机(详情请参考 www.linux-kvm.org 和 www.qemu.org )。
+  对于交叉开发,https://landley.net/aboriginal/bin 提供了一些镜像和工具链,
+  可以帮助搭建交叉开发环境。
+
+- 编译内核时开启CONFIG_GDB_SCRIPTS,关闭CONFIG_DEBUG_INFO_REDUCED。
+  如果架构支持CONFIG_FRAME_POINTER,请保持开启。
+
+- 在guest环境上安装该内核。如有必要,通过在内核command line中添加“nokaslr”来关闭KASLR。
+  此外,QEMU允许通过-kernel、-append、-initrd这些命令行选项直接启动内核。
+  但这通常仅在不依赖内核模块时才有效。有关此模式的更多详细信息,请参阅QEMU文档。
+  在这种情况下,如果架构支持KASLR,应该在禁用CONFIG_RANDOMIZE_BASE的情况下构建内核。
+
+- 启用QEMU/KVM的gdb stub,可以通过如下方式实现
+
+    - 在VM启动时,通过在QEMU命令行中添加“-s”参数
+
+  或
+
+    - 在运行时通过从QEMU监视控制台发送“gdbserver”
+
+- 切换到/path/to/linux-build(内核源码编译)目录
+
+- 启动gdb:gdb vmlinux
+
+  注意:某些发行版可能会将gdb脚本的自动加载限制在已知的安全目录中。
+  如果gdb报告拒绝加载vmlinux-gdb.py(相关命令找不到),请将::
+
+    add-auto-load-safe-path /path/to/linux-build
+
+  添加到~/.gdbinit。更多详细信息,请参阅gdb帮助信息。
+
+- 连接到已启动的guest环境::
+
+    (gdb) target remote :1234
+
+
+使用Linux提供的gdb脚本的示例
+----------------------------
+
+- 加载模块(以及主内核)符号::
+
+    (gdb) lx-symbols
+    loading vmlinux
+    scanning for modules in /home/user/linux/build
+    loading @0xffffffffa0020000: /home/user/linux/build/net/netfilter/xt_tcpudp.ko
+    loading @0xffffffffa0016000: /home/user/linux/build/net/netfilter/xt_pkttype.ko
+    loading @0xffffffffa0002000: /home/user/linux/build/net/netfilter/xt_limit.ko
+    loading @0xffffffffa00ca000: /home/user/linux/build/net/packet/af_packet.ko
+    loading @0xffffffffa003c000: /home/user/linux/build/fs/fuse/fuse.ko
+    ...
+    loading @0xffffffffa0000000: /home/user/linux/build/drivers/ata/ata_generic.ko
+
+- 对一些尚未加载的模块中的函数函数设置断点,例如::
+
+    (gdb) b btrfs_init_sysfs
+    Function "btrfs_init_sysfs" not defined.
+    Make breakpoint pending on future shared library load? (y or [n]) y
+    Breakpoint 1 (btrfs_init_sysfs) pending.
+
+- 继续执行::
+
+    (gdb) c
+
+- 加载模块并且能观察到正在加载的符号以及断点命中::
+
+    loading @0xffffffffa0034000: /home/user/linux/build/lib/libcrc32c.ko
+    loading @0xffffffffa0050000: /home/user/linux/build/lib/lzo/lzo_compress.ko
+    loading @0xffffffffa006e000: /home/user/linux/build/lib/zlib_deflate/zlib_deflate.ko
+    loading @0xffffffffa01b1000: /home/user/linux/build/fs/btrfs/btrfs.ko
+
+    Breakpoint 1, btrfs_init_sysfs () at /home/user/linux/fs/btrfs/sysfs.c:36
+    36              btrfs_kset = kset_create_and_add("btrfs", NULL, fs_kobj);
+
+- 查看内核的日志缓冲区::
+
+    (gdb) lx-dmesg
+    [     0.000000] Initializing cgroup subsys cpuset
+    [     0.000000] Initializing cgroup subsys cpu
+    [     0.000000] Linux version 3.8.0-rc4-dbg+ (...
+    [     0.000000] Command line: root=/dev/sda2 resume=/dev/sda1 vga=0x314
+    [     0.000000] e820: BIOS-provided physical RAM map:
+    [     0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000009fbff] usable
+    [     0.000000] BIOS-e820: [mem 0x000000000009fc00-0x000000000009ffff] reserved
+    ....
+
+- 查看当前task struct结构体的字段(仅x86和arm64支持)::
+
+    (gdb) p $lx_current().pid
+    $1 = 4998
+    (gdb) p $lx_current().comm
+    $2 = "modprobe\000\000\000\000\000\000\000"
+
+- 对当前或指定的CPU使用per-cpu函数::
+
+    (gdb) p $lx_per_cpu("runqueues").nr_running
+    $3 = 1
+    (gdb) p $lx_per_cpu("runqueues", 2).nr_running
+    $4 = 0
+
+- 使用container_of查看更多hrtimers信息::
+
+    (gdb) set $next = $lx_per_cpu("hrtimer_bases").clock_base[0].active.next
+    (gdb) p *$container_of($next, "struct hrtimer", "node")
+    $5 = {
+      node = {
+        node = {
+          __rb_parent_color = 18446612133355256072,
+          rb_right = 0x0 <irq_stack_union>,
+          rb_left = 0x0 <irq_stack_union>
+        },
+        expires = {
+          tv64 = 1835268000000
+        }
+      },
+      _softexpires = {
+        tv64 = 1835268000000
+      },
+      function = 0xffffffff81078232 <tick_sched_timer>,
+      base = 0xffff88003fd0d6f0,
+      state = 1,
+      start_pid = 0,
+      start_site = 0xffffffff81055c1f <hrtimer_start_range_ns+20>,
+      start_comm = "swapper/2\000\000\000\000\000\000"
+    }
+
+
+命令和辅助调试功能列表
+----------------------
+
+命令和辅助调试功能可能会随着时间的推移而改进,此文显示的是初始版本的部分示例::
+
+ (gdb) apropos lx
+ function lx_current -- Return current task
+ function lx_module -- Find module by name and return the module variable
+ function lx_per_cpu -- Return per-cpu variable
+ function lx_task_by_pid -- Find Linux task by PID and return the task_struct variable
+ function lx_thread_info -- Calculate Linux thread_info from task variable
+ lx-dmesg -- Print Linux kernel log buffer
+ lx-lsmod -- List currently loaded modules
+ lx-symbols -- (Re-)load symbols of Linux kernel and currently loaded modules
+
+可以通过“help <command-name>”或“help function <function-name>”命令
+获取指定命令或指定调试功能的更多详细信息。
diff --git a/Documentation/translations/zh_CN/dev-tools/index.rst b/Documentation/translations/zh_CN/dev-tools/index.rst
index 77a8c44cdf49..02577c379007 100644
--- a/Documentation/translations/zh_CN/dev-tools/index.rst
+++ b/Documentation/translations/zh_CN/dev-tools/index.rst
@@ -25,6 +25,7 @@ Documentation/translations/zh_CN/dev-tools/testing-overview.rst
    sparse
    gcov
    kasan
+   gdb-kernel-debugging
 
 Todolist:
 
@@ -34,7 +35,6 @@ Todolist:
  - kmemleak
  - kcsan
  - kfence
- - gdb-kernel-debugging
  - kgdb
  - kselftest
  - kunit/index
-- 
2.17.1

Re: [PATCH v2 -next] docs/zh_CN: Add dev-tools/gdb-kernel-debugging.rst Chinese translation
Posted by Jonathan Corbet 6 days, 11 hours ago
gaochao <gaochao49@huawei.com> writes:

> Translate dev-tools/gdb-kernel-debugging.rst into Chinese.

I've applied this, but one potential concern:

> Signed-off-by: gaochao <gaochao49@huawei.com>
> Reviewed-by: Yanteng Si <siyanteng@loongson.cn>
> Reviewed-by: Wu XiangCheng <bobwxc@email.cn>

When you posted this, XiangCheng's Reviewed-by had not been seen in any
public place.  It was later offered, so no harm done here, but please be
sure not to add such tags unless they have been explicitly given to you.

Thanks,

jon
Re: [PATCH v2 -next] docs/zh_CN: Add dev-tools/gdb-kernel-debugging.rst Chinese translation
Posted by gaochao (L) 4 days, 23 hours ago
Thanks,
I'll make sure that in future patches

在 2022/5/18 3:40, Jonathan Corbet 写道:
> gaochao <gaochao49@huawei.com> writes:
> 
>> Translate dev-tools/gdb-kernel-debugging.rst into Chinese.
> 
> I've applied this, but one potential concern:
> 
>> Signed-off-by: gaochao <gaochao49@huawei.com>
>> Reviewed-by: Yanteng Si <siyanteng@loongson.cn>
>> Reviewed-by: Wu XiangCheng <bobwxc@email.cn>
> 
> When you posted this, XiangCheng's Reviewed-by had not been seen in any
> public place.  It was later offered, so no harm done here, but please be
> sure not to add such tags unless they have been explicitly given to you.
> 
> Thanks,
> 
> jon
> .
Re: [PATCH v2 -next] docs/zh_CN: Add dev-tools/gdb-kernel-debugging.rst Chinese translation
Posted by Wu X.C. 1 week, 2 days ago
On Sat, May 14, 2022 at 06:00:46PM +0800, gaochao wrote:
> Translate dev-tools/gdb-kernel-debugging.rst into Chinese.
> 
> Signed-off-by: gaochao <gaochao49@huawei.com>
> Reviewed-by: Yanteng Si <siyanteng@loongson.cn>

Reviewed-by: Wu XiangCheng <bobwxc@email.cn>

Thanks!
Wu

> ---
> v2:
> - change : to ::
> - change 使能 to 开启
> ---
>  .../zh_CN/dev-tools/gdb-kernel-debugging.rst  | 167 ++++++++++++++++++
>  .../translations/zh_CN/dev-tools/index.rst    |   2 +-
>  2 files changed, 168 insertions(+), 1 deletion(-)
>  create mode 100644 Documentation/translations/zh_CN/dev-tools/gdb-kernel-debugging.rst
> 
> diff --git a/Documentation/translations/zh_CN/dev-tools/gdb-kernel-debugging.rst b/Documentation/translations/zh_CN/dev-tools/gdb-kernel-debugging.rst
> new file mode 100644
> index 000000000000..17b5ce85a90c
> --- /dev/null
> +++ b/Documentation/translations/zh_CN/dev-tools/gdb-kernel-debugging.rst
> @@ -0,0 +1,167 @@
> +.. highlight:: none
> +
> +.. include:: ../disclaimer-zh_CN.rst
> +
> +:Original: Documentation/dev-tools/gdb-kernel-debugging.rst
> +:Translator: 高超 gao chao <gaochao49@huawei.com>
> +
> +通过gdb调试内核和模块
> +=====================
> +
> +Kgdb内核调试器、QEMU等虚拟机管理程序或基于JTAG的硬件接口,支持在运行时使用gdb
> +调试Linux内核及其模块。Gdb提供了一个强大的python脚本接口,内核也提供了一套
> +辅助脚本以简化典型的内核调试步骤。本文档为如何启用和使用这些脚本提供了一个简要的教程。
> +此教程基于QEMU/KVM虚拟机,但文中示例也适用于其他gdb stub。
> +
> +
> +环境配置要求
> +------------
> +
> +- gdb 7.2+ (推荐版本: 7.4+) 且开启python支持 (通常发行版上都已支持)
> +
> +设置
> +----
> +
> +- 创建一个QEMU/KVM的linux虚拟机(详情请参考 www.linux-kvm.org 和 www.qemu.org )。
> +  对于交叉开发,https://landley.net/aboriginal/bin 提供了一些镜像和工具链,
> +  可以帮助搭建交叉开发环境。
> +
> +- 编译内核时开启CONFIG_GDB_SCRIPTS,关闭CONFIG_DEBUG_INFO_REDUCED。
> +  如果架构支持CONFIG_FRAME_POINTER,请保持开启。
> +
> +- 在guest环境上安装该内核。如有必要,通过在内核command line中添加“nokaslr”来关闭KASLR。
> +  此外,QEMU允许通过-kernel、-append、-initrd这些命令行选项直接启动内核。
> +  但这通常仅在不依赖内核模块时才有效。有关此模式的更多详细信息,请参阅QEMU文档。
> +  在这种情况下,如果架构支持KASLR,应该在禁用CONFIG_RANDOMIZE_BASE的情况下构建内核。
> +
> +- 启用QEMU/KVM的gdb stub,可以通过如下方式实现
> +
> +    - 在VM启动时,通过在QEMU命令行中添加“-s”参数
> +
> +  或
> +
> +    - 在运行时通过从QEMU监视控制台发送“gdbserver”
> +
> +- 切换到/path/to/linux-build(内核源码编译)目录
> +
> +- 启动gdb:gdb vmlinux
> +
> +  注意:某些发行版可能会将gdb脚本的自动加载限制在已知的安全目录中。
> +  如果gdb报告拒绝加载vmlinux-gdb.py(相关命令找不到),请将::
> +
> +    add-auto-load-safe-path /path/to/linux-build
> +
> +  添加到~/.gdbinit。更多详细信息,请参阅gdb帮助信息。
> +
> +- 连接到已启动的guest环境::
> +
> +    (gdb) target remote :1234
> +
> +
> +使用Linux提供的gdb脚本的示例
> +----------------------------
> +
> +- 加载模块(以及主内核)符号::
> +
> +    (gdb) lx-symbols
> +    loading vmlinux
> +    scanning for modules in /home/user/linux/build
> +    loading @0xffffffffa0020000: /home/user/linux/build/net/netfilter/xt_tcpudp.ko
> +    loading @0xffffffffa0016000: /home/user/linux/build/net/netfilter/xt_pkttype.ko
> +    loading @0xffffffffa0002000: /home/user/linux/build/net/netfilter/xt_limit.ko
> +    loading @0xffffffffa00ca000: /home/user/linux/build/net/packet/af_packet.ko
> +    loading @0xffffffffa003c000: /home/user/linux/build/fs/fuse/fuse.ko
> +    ...
> +    loading @0xffffffffa0000000: /home/user/linux/build/drivers/ata/ata_generic.ko
> +
> +- 对一些尚未加载的模块中的函数函数设置断点,例如::
> +
> +    (gdb) b btrfs_init_sysfs
> +    Function "btrfs_init_sysfs" not defined.
> +    Make breakpoint pending on future shared library load? (y or [n]) y
> +    Breakpoint 1 (btrfs_init_sysfs) pending.
> +
> +- 继续执行::
> +
> +    (gdb) c
> +
> +- 加载模块并且能观察到正在加载的符号以及断点命中::
> +
> +    loading @0xffffffffa0034000: /home/user/linux/build/lib/libcrc32c.ko
> +    loading @0xffffffffa0050000: /home/user/linux/build/lib/lzo/lzo_compress.ko
> +    loading @0xffffffffa006e000: /home/user/linux/build/lib/zlib_deflate/zlib_deflate.ko
> +    loading @0xffffffffa01b1000: /home/user/linux/build/fs/btrfs/btrfs.ko
> +
> +    Breakpoint 1, btrfs_init_sysfs () at /home/user/linux/fs/btrfs/sysfs.c:36
> +    36              btrfs_kset = kset_create_and_add("btrfs", NULL, fs_kobj);
> +
> +- 查看内核的日志缓冲区::
> +
> +    (gdb) lx-dmesg
> +    [     0.000000] Initializing cgroup subsys cpuset
> +    [     0.000000] Initializing cgroup subsys cpu
> +    [     0.000000] Linux version 3.8.0-rc4-dbg+ (...
> +    [     0.000000] Command line: root=/dev/sda2 resume=/dev/sda1 vga=0x314
> +    [     0.000000] e820: BIOS-provided physical RAM map:
> +    [     0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000009fbff] usable
> +    [     0.000000] BIOS-e820: [mem 0x000000000009fc00-0x000000000009ffff] reserved
> +    ....
> +
> +- 查看当前task struct结构体的字段(仅x86和arm64支持)::
> +
> +    (gdb) p $lx_current().pid
> +    $1 = 4998
> +    (gdb) p $lx_current().comm
> +    $2 = "modprobe\000\000\000\000\000\000\000"
> +
> +- 对当前或指定的CPU使用per-cpu函数::
> +
> +    (gdb) p $lx_per_cpu("runqueues").nr_running
> +    $3 = 1
> +    (gdb) p $lx_per_cpu("runqueues", 2).nr_running
> +    $4 = 0
> +
> +- 使用container_of查看更多hrtimers信息::
> +
> +    (gdb) set $next = $lx_per_cpu("hrtimer_bases").clock_base[0].active.next
> +    (gdb) p *$container_of($next, "struct hrtimer", "node")
> +    $5 = {
> +      node = {
> +        node = {
> +          __rb_parent_color = 18446612133355256072,
> +          rb_right = 0x0 <irq_stack_union>,
> +          rb_left = 0x0 <irq_stack_union>
> +        },
> +        expires = {
> +          tv64 = 1835268000000
> +        }
> +      },
> +      _softexpires = {
> +        tv64 = 1835268000000
> +      },
> +      function = 0xffffffff81078232 <tick_sched_timer>,
> +      base = 0xffff88003fd0d6f0,
> +      state = 1,
> +      start_pid = 0,
> +      start_site = 0xffffffff81055c1f <hrtimer_start_range_ns+20>,
> +      start_comm = "swapper/2\000\000\000\000\000\000"
> +    }
> +
> +
> +命令和辅助调试功能列表
> +----------------------
> +
> +命令和辅助调试功能可能会随着时间的推移而改进,此文显示的是初始版本的部分示例::
> +
> + (gdb) apropos lx
> + function lx_current -- Return current task
> + function lx_module -- Find module by name and return the module variable
> + function lx_per_cpu -- Return per-cpu variable
> + function lx_task_by_pid -- Find Linux task by PID and return the task_struct variable
> + function lx_thread_info -- Calculate Linux thread_info from task variable
> + lx-dmesg -- Print Linux kernel log buffer
> + lx-lsmod -- List currently loaded modules
> + lx-symbols -- (Re-)load symbols of Linux kernel and currently loaded modules
> +
> +可以通过“help <command-name>”或“help function <function-name>”命令
> +获取指定命令或指定调试功能的更多详细信息。
> diff --git a/Documentation/translations/zh_CN/dev-tools/index.rst b/Documentation/translations/zh_CN/dev-tools/index.rst
> index 77a8c44cdf49..02577c379007 100644
> --- a/Documentation/translations/zh_CN/dev-tools/index.rst
> +++ b/Documentation/translations/zh_CN/dev-tools/index.rst
> @@ -25,6 +25,7 @@ Documentation/translations/zh_CN/dev-tools/testing-overview.rst
>     sparse
>     gcov
>     kasan
> +   gdb-kernel-debugging
>  
>  Todolist:
>  
> @@ -34,7 +35,6 @@ Todolist:
>   - kmemleak
>   - kcsan
>   - kfence
> - - gdb-kernel-debugging
>   - kgdb
>   - kselftest
>   - kunit/index
> -- 
> 2.17.1