From 4b17764737bb4ee3364b8bfa2059f51ebc19ccd6 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Mon, 1 Mar 2010 00:02:23 -0800 Subject: sparc: Support show_unhandled_signals. Just faults right now, will add other traps later. Signed-off-by: David S. Miller --- arch/sparc/mm/fault_64.c | 34 +++++++++++++++++++++++++++++++--- 1 file changed, 31 insertions(+), 3 deletions(-) (limited to 'arch/sparc/mm/fault_64.c') diff --git a/arch/sparc/mm/fault_64.c b/arch/sparc/mm/fault_64.c index b9d4ff02b8fc..f92ce56a8b22 100644 --- a/arch/sparc/mm/fault_64.c +++ b/arch/sparc/mm/fault_64.c @@ -32,6 +32,8 @@ #include #include +int show_unhandled_signals = 1; + static inline __kprobes int notify_page_fault(struct pt_regs *regs) { int ret = 0; @@ -128,22 +130,48 @@ outret: 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); } -- cgit v1.2.3