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Commit d8104182 authored by Michael Ellerman's avatar Michael Ellerman
Browse files

powerpc/xmon: Don't print hashed pointers in xmon 



Since commit ad67b74d ("printk: hash addresses printed with %p")
pointers printed with %p are hashed, ie. you don't see the actual
pointer value but rather a cryptographic hash of its value.

In xmon we want to see the actual pointer values, because xmon is a
debugger, so replace %p with %px which prints the actual pointer
value.

We justify doing this in xmon because 1) xmon is a kernel crash
debugger, it's only accessible via the console 2) xmon doesn't print
to dmesg, so the pointers it prints are not able to be leaked that
way.

Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 371b8044

arch/powerpc/xmon/xmon.c

+5 −5
Original line number Diff line number Diff line
@@ -1590,7 +1590,7 @@ static void print_bug_trap(struct pt_regs *regs) 
	printf("kernel BUG at %s:%u!\n",

	       bug->file, bug->line);

#else

	printf("kernel BUG at %p!\n", (void *)bug->bug_addr);

	printf("kernel BUG at %px!\n", (void *)bug->bug_addr);

#endif

#endif /* CONFIG_BUG */

}
@@ -2329,7 +2329,7 @@ static void dump_one_paca(int cpu) 


	p = &paca[cpu];



	printf("paca for cpu 0x%x @ %p:\n", cpu, p);

	printf("paca for cpu 0x%x @ %px:\n", cpu, p);



	printf(" %-*s = %s\n", 20, "possible", cpu_possible(cpu) ? "yes" : "no");

	printf(" %-*s = %s\n", 20, "present", cpu_present(cpu) ? "yes" : "no");
@@ -2945,7 +2945,7 @@ static void show_task(struct task_struct *tsk) 
		(tsk->exit_state & EXIT_DEAD) ? 'E' :

		(tsk->state & TASK_INTERRUPTIBLE) ? 'S' : '?';



	printf("%p %016lx %6d %6d %c %2d %s\n", tsk,

	printf("%px %016lx %6d %6d %c %2d %s\n", tsk,

		tsk->thread.ksp,

		tsk->pid, tsk->parent->pid,

		state, task_thread_info(tsk)->cpu,
@@ -2988,7 +2988,7 @@ static void show_pte(unsigned long addr) 


	if (setjmp(bus_error_jmp) != 0) {

		catch_memory_errors = 0;

		printf("*** Error dumping pte for task %p\n", tsk);

		printf("*** Error dumping pte for task %px\n", tsk);

		return;

	}
@@ -3074,7 +3074,7 @@ static void show_tasks(void) 


	if (setjmp(bus_error_jmp) != 0) {

		catch_memory_errors = 0;

		printf("*** Error dumping task %p\n", tsk);

		printf("*** Error dumping task %px\n", tsk);

		return;

	}