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-rw-r--r--Documentation/filesystems/nilfs2.txt5
-rw-r--r--Documentation/gdb-kernel-debugging.txt21
-rw-r--r--Documentation/kdump/gdbmacros.txt96
3 files changed, 70 insertions, 52 deletions
diff --git a/Documentation/filesystems/nilfs2.txt b/Documentation/filesystems/nilfs2.txt
index 41c3d332acc9..5b21ef76f751 100644
--- a/Documentation/filesystems/nilfs2.txt
+++ b/Documentation/filesystems/nilfs2.txt
@@ -268,3 +268,8 @@ among NILFS2 files can be depicted as follows:
( regular file, directory, or symlink )
For detail on the format of each file, please see include/linux/nilfs2_fs.h.
+
+There are no patents or other intellectual property that we protect
+with regard to the design of NILFS2. It is allowed to replicate the
+design in hopes that other operating systems could share (mount, read,
+write, etc.) data stored in this format.
diff --git a/Documentation/gdb-kernel-debugging.txt b/Documentation/gdb-kernel-debugging.txt
index 7050ce8794b9..4ab7d43d0754 100644
--- a/Documentation/gdb-kernel-debugging.txt
+++ b/Documentation/gdb-kernel-debugging.txt
@@ -139,6 +139,27 @@ Examples of using the Linux-provided gdb helpers
start_comm = "swapper/2\000\000\000\000\000\000"
}
+ o Dig into a radix tree data structure, such as the IRQ descriptors:
+ (gdb) print (struct irq_desc)$lx_radix_tree_lookup(irq_desc_tree, 18)
+ $6 = {
+ irq_common_data = {
+ state_use_accessors = 67584,
+ handler_data = 0x0 <__vectors_start>,
+ msi_desc = 0x0 <__vectors_start>,
+ affinity = {{
+ bits = {65535}
+ }}
+ },
+ irq_data = {
+ mask = 0,
+ irq = 18,
+ hwirq = 27,
+ common = 0xee803d80,
+ chip = 0xc0eb0854 <gic_data>,
+ domain = 0xee808000,
+ parent_data = 0x0 <__vectors_start>,
+ chip_data = 0xc0eb0854 <gic_data>
+ } <... trimmed ...>
List of commands and functions
------------------------------
diff --git a/Documentation/kdump/gdbmacros.txt b/Documentation/kdump/gdbmacros.txt
index 9b9b454b048a..35f6a982a0d5 100644
--- a/Documentation/kdump/gdbmacros.txt
+++ b/Documentation/kdump/gdbmacros.txt
@@ -15,15 +15,16 @@
define bttnobp
set $tasks_off=((size_t)&((struct task_struct *)0)->tasks)
- set $pid_off=((size_t)&((struct task_struct *)0)->pids[1].pid_list.next)
+ set $pid_off=((size_t)&((struct task_struct *)0)->thread_group.next)
set $init_t=&init_task
set $next_t=(((char *)($init_t->tasks).next) - $tasks_off)
+ set var $stacksize = sizeof(union thread_union)
while ($next_t != $init_t)
set $next_t=(struct task_struct *)$next_t
printf "\npid %d; comm %s:\n", $next_t.pid, $next_t.comm
printf "===================\n"
- set var $stackp = $next_t.thread.esp
- set var $stack_top = ($stackp & ~4095) + 4096
+ set var $stackp = $next_t.thread.sp
+ set var $stack_top = ($stackp & ~($stacksize - 1)) + $stacksize
while ($stackp < $stack_top)
if (*($stackp) > _stext && *($stackp) < _sinittext)
@@ -31,13 +32,13 @@ define bttnobp
end
set $stackp += 4
end
- set $next_th=(((char *)$next_t->pids[1].pid_list.next) - $pid_off)
+ set $next_th=(((char *)$next_t->thread_group.next) - $pid_off)
while ($next_th != $next_t)
set $next_th=(struct task_struct *)$next_th
printf "\npid %d; comm %s:\n", $next_t.pid, $next_t.comm
printf "===================\n"
- set var $stackp = $next_t.thread.esp
- set var $stack_top = ($stackp & ~4095) + 4096
+ set var $stackp = $next_t.thread.sp
+ set var $stack_top = ($stackp & ~($stacksize - 1)) + stacksize
while ($stackp < $stack_top)
if (*($stackp) > _stext && *($stackp) < _sinittext)
@@ -45,7 +46,7 @@ define bttnobp
end
set $stackp += 4
end
- set $next_th=(((char *)$next_th->pids[1].pid_list.next) - $pid_off)
+ set $next_th=(((char *)$next_th->thread_group.next) - $pid_off)
end
set $next_t=(char *)($next_t->tasks.next) - $tasks_off
end
@@ -54,42 +55,44 @@ document bttnobp
dump all thread stack traces on a kernel compiled with !CONFIG_FRAME_POINTER
end
+define btthreadstack
+ set var $pid_task = $arg0
+
+ printf "\npid %d; comm %s:\n", $pid_task.pid, $pid_task.comm
+ printf "task struct: "
+ print $pid_task
+ printf "===================\n"
+ set var $stackp = $pid_task.thread.sp
+ set var $stacksize = sizeof(union thread_union)
+ set var $stack_top = ($stackp & ~($stacksize - 1)) + $stacksize
+ set var $stack_bot = ($stackp & ~($stacksize - 1))
+
+ set $stackp = *((unsigned long *) $stackp)
+ while (($stackp < $stack_top) && ($stackp > $stack_bot))
+ set var $addr = *(((unsigned long *) $stackp) + 1)
+ info symbol $addr
+ set $stackp = *((unsigned long *) $stackp)
+ end
+end
+document btthreadstack
+ dump a thread stack using the given task structure pointer
+end
+
+
define btt
set $tasks_off=((size_t)&((struct task_struct *)0)->tasks)
- set $pid_off=((size_t)&((struct task_struct *)0)->pids[1].pid_list.next)
+ set $pid_off=((size_t)&((struct task_struct *)0)->thread_group.next)
set $init_t=&init_task
set $next_t=(((char *)($init_t->tasks).next) - $tasks_off)
while ($next_t != $init_t)
set $next_t=(struct task_struct *)$next_t
- printf "\npid %d; comm %s:\n", $next_t.pid, $next_t.comm
- printf "===================\n"
- set var $stackp = $next_t.thread.esp
- set var $stack_top = ($stackp & ~4095) + 4096
- set var $stack_bot = ($stackp & ~4095)
-
- set $stackp = *($stackp)
- while (($stackp < $stack_top) && ($stackp > $stack_bot))
- set var $addr = *($stackp + 4)
- info symbol $addr
- set $stackp = *($stackp)
- end
+ btthreadstack $next_t
- set $next_th=(((char *)$next_t->pids[1].pid_list.next) - $pid_off)
+ set $next_th=(((char *)$next_t->thread_group.next) - $pid_off)
while ($next_th != $next_t)
set $next_th=(struct task_struct *)$next_th
- printf "\npid %d; comm %s:\n", $next_t.pid, $next_t.comm
- printf "===================\n"
- set var $stackp = $next_t.thread.esp
- set var $stack_top = ($stackp & ~4095) + 4096
- set var $stack_bot = ($stackp & ~4095)
-
- set $stackp = *($stackp)
- while (($stackp < $stack_top) && ($stackp > $stack_bot))
- set var $addr = *($stackp + 4)
- info symbol $addr
- set $stackp = *($stackp)
- end
- set $next_th=(((char *)$next_th->pids[1].pid_list.next) - $pid_off)
+ btthreadstack $next_th
+ set $next_th=(((char *)$next_th->thread_group.next) - $pid_off)
end
set $next_t=(char *)($next_t->tasks.next) - $tasks_off
end
@@ -101,7 +104,7 @@ end
define btpid
set var $pid = $arg0
set $tasks_off=((size_t)&((struct task_struct *)0)->tasks)
- set $pid_off=((size_t)&((struct task_struct *)0)->pids[1].pid_list.next)
+ set $pid_off=((size_t)&((struct task_struct *)0)->thread_group.next)
set $init_t=&init_task
set $next_t=(((char *)($init_t->tasks).next) - $tasks_off)
set var $pid_task = 0
@@ -113,29 +116,18 @@ define btpid
set $pid_task = $next_t
end
- set $next_th=(((char *)$next_t->pids[1].pid_list.next) - $pid_off)
+ set $next_th=(((char *)$next_t->thread_group.next) - $pid_off)
while ($next_th != $next_t)
set $next_th=(struct task_struct *)$next_th
if ($next_th.pid == $pid)
set $pid_task = $next_th
end
- set $next_th=(((char *)$next_th->pids[1].pid_list.next) - $pid_off)
+ set $next_th=(((char *)$next_th->thread_group.next) - $pid_off)
end
set $next_t=(char *)($next_t->tasks.next) - $tasks_off
end
- printf "\npid %d; comm %s:\n", $pid_task.pid, $pid_task.comm
- printf "===================\n"
- set var $stackp = $pid_task.thread.esp
- set var $stack_top = ($stackp & ~4095) + 4096
- set var $stack_bot = ($stackp & ~4095)
-
- set $stackp = *($stackp)
- while (($stackp < $stack_top) && ($stackp > $stack_bot))
- set var $addr = *($stackp + 4)
- info symbol $addr
- set $stackp = *($stackp)
- end
+ btthreadstack $pid_task
end
document btpid
backtrace of pid
@@ -145,7 +137,7 @@ end
define trapinfo
set var $pid = $arg0
set $tasks_off=((size_t)&((struct task_struct *)0)->tasks)
- set $pid_off=((size_t)&((struct task_struct *)0)->pids[1].pid_list.next)
+ set $pid_off=((size_t)&((struct task_struct *)0)->thread_group.next)
set $init_t=&init_task
set $next_t=(((char *)($init_t->tasks).next) - $tasks_off)
set var $pid_task = 0
@@ -157,13 +149,13 @@ define trapinfo
set $pid_task = $next_t
end
- set $next_th=(((char *)$next_t->pids[1].pid_list.next) - $pid_off)
+ set $next_th=(((char *)$next_t->thread_group.next) - $pid_off)
while ($next_th != $next_t)
set $next_th=(struct task_struct *)$next_th
if ($next_th.pid == $pid)
set $pid_task = $next_th
end
- set $next_th=(((char *)$next_th->pids[1].pid_list.next) - $pid_off)
+ set $next_th=(((char *)$next_th->thread_group.next) - $pid_off)
end
set $next_t=(char *)($next_t->tasks.next) - $tasks_off
end
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-02 21:39:22 +0000