powerpc/xmon: Add xmon command to dump process/task similar to ps(1)

Add 'P' command with optional task_struct address to dump all/one task's
information: task pointer, kernel stack pointer, PID, PPID, state
(interpreted), CPU where (last) running, and command.

Signed-off-by: Douglas Miller <dougmill@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Douglas Miller 2015-11-23 09:01:15 -06:00 коммит произвёл Michael Ellerman
Родитель fde93a0f77
Коммит 6dfb54049f
1 изменённых файлов: 60 добавлений и 0 удалений

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@ -163,6 +163,7 @@ static int cpu_cmd(void);
static void csum(void);
static void bootcmds(void);
static void proccall(void);
static void show_tasks(void);
void dump_segments(void);
static void symbol_lookup(void);
static void xmon_show_stack(unsigned long sp, unsigned long lr,
@ -238,6 +239,7 @@ Commands:\n\
mz zero a block of memory\n\
mi show information about memory allocation\n\
p call a procedure\n\
P list processes/tasks\n\
r print registers\n\
s single step\n"
#ifdef CONFIG_SPU_BASE
@ -967,6 +969,9 @@ cmds(struct pt_regs *excp)
case 'p':
proccall();
break;
case 'P':
show_tasks();
break;
#ifdef CONFIG_PPC_STD_MMU
case 'u':
dump_segments();
@ -2566,6 +2571,61 @@ memzcan(void)
printf("%.8x\n", a - mskip);
}
static void show_task(struct task_struct *tsk)
{
char state;
/*
* Cloned from kdb_task_state_char(), which is not entirely
* appropriate for calling from xmon. This could be moved
* to a common, generic, routine used by both.
*/
state = (tsk->state == 0) ? 'R' :
(tsk->state < 0) ? 'U' :
(tsk->state & TASK_UNINTERRUPTIBLE) ? 'D' :
(tsk->state & TASK_STOPPED) ? 'T' :
(tsk->state & TASK_TRACED) ? 'C' :
(tsk->exit_state & EXIT_ZOMBIE) ? 'Z' :
(tsk->exit_state & EXIT_DEAD) ? 'E' :
(tsk->state & TASK_INTERRUPTIBLE) ? 'S' : '?';
printf("%p %016lx %6d %6d %c %2d %s\n", tsk,
tsk->thread.ksp,
tsk->pid, tsk->parent->pid,
state, task_thread_info(tsk)->cpu,
tsk->comm);
}
static void show_tasks(void)
{
unsigned long tskv;
struct task_struct *tsk = NULL;
printf(" task_struct ->thread.ksp PID PPID S P CMD\n");
if (scanhex(&tskv))
tsk = (struct task_struct *)tskv;
if (setjmp(bus_error_jmp) != 0) {
catch_memory_errors = 0;
printf("*** Error dumping task %p\n", tsk);
return;
}
catch_memory_errors = 1;
sync();
if (tsk)
show_task(tsk);
else
for_each_process(tsk)
show_task(tsk);
sync();
__delay(200);
catch_memory_errors = 0;
}
static void proccall(void)
{
unsigned long args[8];