sparc: Support show_unhandled_signals.
Just faults right now, will add other traps later.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc/mm/fault_64.c b/arch/sparc/mm/fault_64.c
index b9d4ff0..f92ce56 100644
--- a/arch/sparc/mm/fault_64.c
+++ b/arch/sparc/mm/fault_64.c
@@ -32,6 +32,8 @@
#include <asm/sections.h>
#include <asm/mmu_context.h>
+int show_unhandled_signals = 1;
+
static inline __kprobes int notify_page_fault(struct pt_regs *regs)
{
int ret = 0;
@@ -128,22 +130,48 @@
return insn;
}
+static inline void
+show_signal_msg(struct pt_regs *regs, int sig, int code,
+ unsigned long address, struct task_struct *tsk)
+{
+ if (!unhandled_signal(tsk, sig))
+ return;
+
+ if (!printk_ratelimit())
+ return;
+
+ printk("%s%s[%d]: segfault at %lx ip %p (rpc %p) sp %p error %x",
+ task_pid_nr(tsk) > 1 ? KERN_INFO : KERN_EMERG,
+ tsk->comm, task_pid_nr(tsk), address,
+ (void *)regs->tpc, (void *)regs->u_regs[UREG_I7],
+ (void *)regs->u_regs[UREG_FP], code);
+
+ print_vma_addr(KERN_CONT " in ", regs->tpc);
+
+ printk(KERN_CONT "\n");
+}
+
extern unsigned long compute_effective_address(struct pt_regs *, unsigned int, unsigned int);
static void do_fault_siginfo(int code, int sig, struct pt_regs *regs,
unsigned int insn, int fault_code)
{
+ unsigned long addr;
siginfo_t info;
info.si_code = code;
info.si_signo = sig;
info.si_errno = 0;
if (fault_code & FAULT_CODE_ITLB)
- info.si_addr = (void __user *) regs->tpc;
+ addr = regs->tpc;
else
- info.si_addr = (void __user *)
- compute_effective_address(regs, insn, 0);
+ addr = compute_effective_address(regs, insn, 0);
+ info.si_addr = (void __user *) addr;
info.si_trapno = 0;
+
+ if (unlikely(show_unhandled_signals))
+ show_signal_msg(regs, sig, code, addr, current);
+
force_sig_info(sig, &info, current);
}