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authorDouglas Miller <dougmill@linux.vnet.ibm.com>2015-11-23 18:01:15 +0300
committerMichael Ellerman <mpe@ellerman.id.au>2016-02-10 02:22:04 +0300
commit6dfb54049f9a99b24fe5d5cd2d3af19eadc8f31f (patch)
treefc547cc51fe6fb99bd44c08d7f9894734d5d8db3 /arch/powerpc/xmon/xmon.c
parentfde93a0f774f510bfaabccd5ba00f97972be1e12 (diff)
downloadlinux-6dfb54049f9a99b24fe5d5cd2d3af19eadc8f31f.tar.xz
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>
Diffstat (limited to 'arch/powerpc/xmon/xmon.c')
-rw-r--r--arch/powerpc/xmon/xmon.c60
1 files changed, 60 insertions, 0 deletions
diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c
index 47e195d66a9a..942796fa4767 100644
--- a/arch/powerpc/xmon/xmon.c
+++ b/arch/powerpc/xmon/xmon.c
@@ -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];