diff options
Diffstat (limited to 'arch/mips/mm/fault.c')
| -rw-r--r-- | arch/mips/mm/fault.c | 29 |
1 files changed, 20 insertions, 9 deletions
diff --git a/arch/mips/mm/fault.c b/arch/mips/mm/fault.c index 70ab5d664332..7ff8637e530d 100644 --- a/arch/mips/mm/fault.c +++ b/arch/mips/mm/fault.c @@ -14,6 +14,7 @@ #include <linux/string.h> #include <linux/types.h> #include <linux/ptrace.h> +#include <linux/ratelimit.h> #include <linux/mman.h> #include <linux/mm.h> #include <linux/smp.h> @@ -28,6 +29,8 @@ #include <asm/highmem.h> /* For VMALLOC_END */ #include <linux/kdebug.h> +int show_unhandled_signals = 1; + /* * This routine handles page faults. It determines the address, * and the problem, and then passes it off to one of the appropriate @@ -44,6 +47,8 @@ static void __kprobes __do_page_fault(struct pt_regs *regs, unsigned long write, int fault; unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE; + static DEFINE_RATELIMIT_STATE(ratelimit_state, 5 * HZ, 10); + #if 0 printk("Cpu%d[%s:%d:%0*lx:%ld:%0*lx]\n", raw_smp_processor_id(), current->comm, current->pid, field, address, write, @@ -203,15 +208,21 @@ bad_area_nosemaphore: if (user_mode(regs)) { tsk->thread.cp0_badvaddr = address; tsk->thread.error_code = write; -#if 0 - printk("do_page_fault() #2: sending SIGSEGV to %s for " - "invalid %s\n%0*lx (epc == %0*lx, ra == %0*lx)\n", - tsk->comm, - write ? "write access to" : "read access from", - field, address, - field, (unsigned long) regs->cp0_epc, - field, (unsigned long) regs->regs[31]); -#endif + if (show_unhandled_signals && + unhandled_signal(tsk, SIGSEGV) && + __ratelimit(&ratelimit_state)) { + pr_info("\ndo_page_fault(): sending SIGSEGV to %s for invalid %s %0*lx", + tsk->comm, + write ? "write access to" : "read access from", + field, address); + pr_info("epc = %0*lx in", field, + (unsigned long) regs->cp0_epc); + print_vma_addr(" ", regs->cp0_epc); + pr_info("ra = %0*lx in", field, + (unsigned long) regs->regs[31]); + print_vma_addr(" ", regs->regs[31]); + pr_info("\n"); + } info.si_signo = SIGSEGV; info.si_errno = 0; /* info.si_code has been set above */ |