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xtensa: improve stack dumping 

Calculate printable stack size and use print_hex_dump instead of
opencoding it.
Drop extra newline output in show_trace as its output format does not
depend on CONFIG_KALLSYMS.

Reviewed-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
This commit is contained in:
Max Filippov 2019-11-12 08:47:48 -08:00
parent 5eff6ca2e3
commit c5fccebc13
1 changed files with 11 additions and 16 deletions
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27
arch/xtensa/kernel/traps.c
View File

@ -491,32 +491,27 @@ void show_trace(struct task_struct *task, unsigned long *sp)
pr_info("Call Trace:\n");
walk_stackframe(sp, show_trace_cb, NULL);
#ifndef CONFIG_KALLSYMS
pr_cont("\n");
#endif
}
static int kstack_depth_to_print = 24;
#define STACK_DUMP_ENTRY_SIZE 4
#define STACK_DUMP_LINE_SIZE 32
static size_t kstack_depth_to_print = 24;
void show_stack(struct task_struct *task, unsigned long *sp)
{
int i = 0;
unsigned long *stack;
size_t len;
if (!sp)
sp = stack_pointer(task);
stack = sp;
len = min((-(size_t)sp) & (THREAD_SIZE - STACK_DUMP_ENTRY_SIZE),
kstack_depth_to_print * STACK_DUMP_ENTRY_SIZE);
pr_info("Stack:\n");
for (i = 0; i < kstack_depth_to_print; i++) {
if (kstack_end(sp))
break;
pr_cont(" %08lx", *sp++);
if (i % 8 == 7)
pr_cont("\n");
}
show_trace(task, stack);
print_hex_dump(KERN_INFO, " ", DUMP_PREFIX_NONE,
STACK_DUMP_LINE_SIZE, STACK_DUMP_ENTRY_SIZE,
sp, len, false);
show_trace(task, sp);
}
DEFINE_SPINLOCK(die_lock);