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Commit 6dfb5404 authored by Douglas Miller's avatar Douglas Miller Committed by Michael Ellerman
Browse files

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: default avatarDouglas Miller <dougmill@linux.vnet.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent fde93a0f

arch/powerpc/xmon/xmon.c

+60 −0
Original line number Diff line number Diff line
@@ -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];