Merge pull request #5559 from gebart/pr/ps-stack-pointer

sys/ps: Add current stack pointer to DEVELHELP output

core/include/arch/thread_arch.h

@@ -63,6 +63,16 @@ char *thread_arch_stack_init(thread_task_func_t task_func, void *arg, void *stac
  */
 int thread_arch_isr_stack_usage(void);
 
+/**
+ * @brief   Get the current ISR stack pointer
+ */
+void *thread_arch_isr_stack_pointer(void);
+
+/**
+ * @brief   Get the start of the ISR stack
+ */
+void *thread_arch_isr_stack_start(void);
+
 /**
  * @brief Print the current stack to stdout
  */

cpu/arm7_common/arm_cpu.c

@@ -35,6 +35,18 @@ int thread_arch_isr_stack_usage(void)
     return -1;
 }
 
+void *thread_arch_isr_stack_pointer(void)
+{
+    /* TODO */
+    return (void *)-1;
+}
+
+void *thread_arch_isr_stack_start(void)
+{
+    /* TODO */
+    return (void *)-1;
+}
+
 /*----------------------------------------------------------------------------
  * Processor specific routine - here for ARM7
  * sizeof(void*) = sizeof(int)

cpu/atmega_common/thread_arch.c

@@ -205,6 +205,18 @@ int thread_arch_isr_stack_usage(void)
     return -1;
 }
 
+void *thread_arch_isr_stack_pointer(void)
+{
+    /* TODO */
+    return (void *)-1;
+}
+
+void *thread_arch_isr_stack_start(void)
+{
+    /* TODO */
+    return (void *)-1;
+}
+
 void thread_arch_start_threading(void) __attribute__((naked));
 void thread_arch_start_threading(void)
 {

cpu/cortexm_common/thread_arch.c

@@ -267,6 +267,17 @@ int thread_arch_isr_stack_usage(void)
     return num_used_words * sizeof(*ptr);
 }
 
+void *thread_arch_isr_stack_pointer(void)
+{
+    void *msp = (void *)__get_MSP();
+    return msp;
+}
+
+void *thread_arch_isr_stack_start(void)
+{
+    return (void *)&_sstack;
+}
+
 __attribute__((naked)) void NORETURN thread_arch_start_threading(void)
 {
     __asm__ volatile (

cpu/msp430-common/cpu.c

@@ -40,6 +40,18 @@ int thread_arch_isr_stack_usage(void)
     return -1;
 }
 
+void *thread_arch_isr_stack_pointer(void)
+{
+    /* TODO */
+    return (void *)-1;
+}
+
+void *thread_arch_isr_stack_start(void)
+{
+    /* TODO */
+    return (void *)-1;
+}
+
 NORETURN void cpu_switch_context_exit(void)
 {
     sched_active_thread = sched_threads[0];

cpu/native/irq_cpu.c

@@ -62,6 +62,16 @@ int _sig_pipefd[2];
 static _native_callback_t native_irq_handlers[255];
 char sigalt_stk[SIGSTKSZ];
 
+void *thread_arch_isr_stack_pointer(void)
+{
+    return native_isr_context.uc_stack.ss_sp;
+}
+
+void *thread_arch_isr_stack_start(void)
+{
+    return __isr_stack;
+}
+
 void print_thread_sigmask(ucontext_t *cp)
 {
     sigset_t *p = &cp->uc_sigmask;

cpu/x86/x86_threading.c

@@ -117,6 +117,16 @@ void thread_yield_higher(void)
     irq_restore(old_intr);
 }
 
+void *thread_arch_isr_stack_pointer(void)
+{
+    return isr_context.uc_stack.ss_sp;
+}
+
+void *thread_arch_isr_stack_start(void)
+{
+    return isr_stack;
+}
+
 void isr_cpu_switch_context_exit(void)
 {
     DEBUG("XXX: cpu_switch_context_exit(), num_tasks = %d\n", sched_num_threads);

sys/ps/ps.c

@@ -60,7 +60,7 @@ void ps(void)
 #endif
             "%-9sQ | pri "
 #ifdef DEVELHELP
-           "| stack ( used) | location   "
+           "| stack ( used) | base       | current    "
 #endif
 #ifdef MODULE_SCHEDSTATISTICS
            "| runtime | switches"
@@ -72,9 +72,11 @@ void ps(void)
            "state");
 
 #ifdef DEVELHELP
-    int isr_usage = thread_arch_isr_stack_usage();                                 /* ISR stack usage */
+    int isr_usage = thread_arch_isr_stack_usage();
+    void *isr_start = thread_arch_isr_stack_start();
+    void *isr_sp = thread_arch_isr_stack_pointer();
     printf("\t  - | isr_stack            | -        - |"
-           "   - | %5i (%5i) | -\n", ISR_STACKSIZE, isr_usage);
+           "   - | %5i (%5i) | %10p | %10p\n", ISR_STACKSIZE, isr_usage, isr_start, isr_sp);
     overall_stacksz += ISR_STACKSIZE;
     if (isr_usage > 0) {
         overall_used += isr_usage;
@@ -104,7 +106,7 @@ void ps(void)
 #endif
                    " | %-8s %.1s | %3i"
 #ifdef DEVELHELP
-                   " | %5i (%5i) | %p "
+                   " | %5i (%5i) | %10p | %10p "
 #endif
 #ifdef MODULE_SCHEDSTATISTICS
                    " | %6.3f%% |  %8d"
@@ -116,7 +118,7 @@ void ps(void)
 #endif
                    sname, queued, p->priority
 #ifdef DEVELHELP
-                   , p->stack_size, stacksz, (void *)p->stack_start
+                   , p->stack_size, stacksz, (void *)p->stack_start, (void *)p->sp
 #endif
 #ifdef MODULE_SCHEDSTATISTICS
                    , runtime_ticks, switches