diff options
Diffstat (limited to 'arch/blackfin/kernel/traps.c')
| -rw-r--r-- | arch/blackfin/kernel/traps.c | 32 |
1 files changed, 26 insertions, 6 deletions
diff --git a/arch/blackfin/kernel/traps.c b/arch/blackfin/kernel/traps.c index d3cbcd6bd985..ba70c4bc2699 100644 --- a/arch/blackfin/kernel/traps.c +++ b/arch/blackfin/kernel/traps.c @@ -138,6 +138,12 @@ static void decode_address(char *buf, unsigned long address) if (!mm) continue; + if (!down_read_trylock(&mm->mmap_sem)) { + if (!in_atomic) + mmput(mm); + continue; + } + for (n = rb_first(&mm->mm_rb); n; n = rb_next(n)) { struct vm_area_struct *vma; @@ -177,6 +183,7 @@ static void decode_address(char *buf, unsigned long address) sprintf(buf, "[ %s vma:0x%lx-0x%lx]", name, vma->vm_start, vma->vm_end); + up_read(&mm->mmap_sem); if (!in_atomic) mmput(mm); @@ -186,11 +193,16 @@ static void decode_address(char *buf, unsigned long address) goto done; } } + + up_read(&mm->mmap_sem); if (!in_atomic) mmput(mm); } - /* we were unable to find this address anywhere */ + /* + * we were unable to find this address anywhere, + * or some MMs were skipped because they were in use. + */ sprintf(buf, "/* kernel dynamic memory */"); done: @@ -248,9 +260,7 @@ asmlinkage notrace void trap_c(struct pt_regs *fp) #ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON int j; #endif -#ifdef CONFIG_DEBUG_HUNT_FOR_ZERO unsigned int cpu = raw_smp_processor_id(); -#endif const char *strerror = NULL; int sig = 0; siginfo_t info; @@ -639,7 +649,17 @@ asmlinkage notrace void trap_c(struct pt_regs *fp) { info.si_signo = sig; info.si_errno = 0; - info.si_addr = (void __user *)fp->pc; + switch (trapnr) { + case VEC_CPLB_VL: + case VEC_MISALI_D: + case VEC_CPLB_M: + case VEC_CPLB_MHIT: + info.si_addr = (void __user *)cpu_pda[cpu].dcplb_fault_addr; + break; + default: + info.si_addr = (void __user *)fp->pc; + break; + } force_sig_info(sig, &info, current); } @@ -712,7 +732,7 @@ static void decode_instruction(unsigned short *address) verbose_printk("RTE"); else if (opcode == 0x0025) verbose_printk("EMUEXCPT"); - else if (opcode == 0x0040 && opcode <= 0x0047) + else if (opcode >= 0x0040 && opcode <= 0x0047) verbose_printk("STI R%i", opcode & 7); else if (opcode >= 0x0050 && opcode <= 0x0057) verbose_printk("JUMP (P%i)", opcode & 7); @@ -1096,7 +1116,7 @@ void dump_bfin_mem(struct pt_regs *fp) /* And the last RETI points to the current userspace context */ if ((fp + 1)->pc >= current->mm->start_code && (fp + 1)->pc <= current->mm->end_code) { - verbose_printk(KERN_NOTICE "It might be better to look around here : \n"); + verbose_printk(KERN_NOTICE "It might be better to look around here :\n"); verbose_printk(KERN_NOTICE "-------------------------------------------\n"); show_regs(fp + 1); verbose_printk(KERN_NOTICE "-------------------------------------------\n"); |