powerpc/64s: Blacklist functions invoked on a trap
Blacklist all functions involved while handling a trap. We:
- convert some of the symbols into private symbols, and
- blacklist most functions involved while handling a trap.
Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index d4e545d..bfcfd9e 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -237,6 +237,7 @@
err = 0;
oops_end(flags, regs, err);
}
+NOKPROBE_SYMBOL(die);
void user_single_step_siginfo(struct task_struct *tsk,
struct pt_regs *regs, siginfo_t *info)
@@ -1968,6 +1969,7 @@
regs->trap, regs->nip);
die("Unrecoverable exception", regs, SIGABRT);
}
+NOKPROBE_SYMBOL(unrecoverable_exception);
#if defined(CONFIG_BOOKE_WDT) || defined(CONFIG_40x)
/*
@@ -1998,6 +2000,7 @@
regs->gpr[1], regs->nip);
die("Bad kernel stack pointer", regs, SIGABRT);
}
+NOKPROBE_SYMBOL(kernel_bad_stack);
void __init trap_init(void)
{