/* dumped to the console via printk) */
#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
-spinlock_t pa_dbit_lock = SPIN_LOCK_UNLOCKED;
+DEFINE_SPINLOCK(pa_dbit_lock);
#endif
int printbinary(char *buf, unsigned long x, int nbits)
EXPORT_SYMBOL(dump_stack);
-void show_stack(struct task_struct *task, unsigned long *s)
+static void do_show_stack(struct unwind_frame_info *info)
{
int i = 1;
- struct unwind_frame_info info;
-
- if (!task) {
- unsigned long sp, ip, rp;
-
-HERE:
- asm volatile ("copy %%r30, %0" : "=r"(sp));
- ip = (unsigned long)&&HERE;
- rp = (unsigned long)__builtin_return_address(0);
- unwind_frame_init(&info, current, sp, ip, rp);
- } else {
- unwind_frame_init_from_blocked_task(&info, task);
- }
printk("Backtrace:\n");
while (i <= 16) {
- if (unwind_once(&info) < 0 || info.ip == 0)
+ if (unwind_once(info) < 0 || info->ip == 0)
break;
- if (__kernel_text_address(info.ip)) {
- printk(" [<" RFMT ">] ", info.ip);
+ if (__kernel_text_address(info->ip)) {
+ printk(" [<" RFMT ">] ", info->ip);
#ifdef CONFIG_KALLSYMS
- print_symbol("%s\n", info.ip);
+ print_symbol("%s\n", info->ip);
#else
if ((i & 0x03) == 0)
printk("\n");
printk("\n");
}
+void show_stack(struct task_struct *task, unsigned long *s)
+{
+ struct unwind_frame_info info;
+
+ if (!task) {
+ unsigned long sp, ip, rp;
+
+HERE:
+ asm volatile ("copy %%r30, %0" : "=r"(sp));
+ ip = (unsigned long)&&HERE;
+ rp = (unsigned long)__builtin_return_address(0);
+ unwind_frame_init(&info, current, sp, ip, rp);
+ } else {
+ unwind_frame_init_from_blocked_task(&info, task);
+ }
+
+ do_show_stack(&info);
+}
+
void die_if_kernel(char *str, struct pt_regs *regs, long err)
{
if (user_mode(regs)) {
/*
- * This routine handles page faults. It determines the address,
- * and the problem, and then passes it off to one of the appropriate
- * routines.
+ * This routine is called as a last resort when everything else
+ * has gone clearly wrong. We get called for faults in kernel space,
+ * and HPMC's.
*/
void parisc_terminate(char *msg, struct pt_regs *regs, int code, unsigned long offset)
{
- static spinlock_t terminate_lock = SPIN_LOCK_UNLOCKED;
+ static DEFINE_SPINLOCK(terminate_lock);
oops_in_progress = 1;
}
- show_stack(NULL, (unsigned long *)regs->gr[30]);
+ {
+ /* show_stack(NULL, (unsigned long *)regs->gr[30]); */
+ struct unwind_frame_info info;
+ unwind_frame_init(&info, current, regs->gr[30], regs->iaoq[0], regs->gr[2]);
+ do_show_stack(&info);
+ }
printk("\n");
printk(KERN_CRIT "%s: Code=%d regs=%p (Addr=" RFMT ")\n",
* system will shut down immediately right here. */
pdc_soft_power_button(0);
- /* Gutter the processor! */
- for(;;)
- ;
+ /* Call kernel panic() so reboot timeouts work properly
+ * FIXME: This function should be on the list of
+ * panic notifiers, and we should call panic
+ * directly from the location that we wish.
+ * e.g. We should not call panic from
+ * parisc_terminate, but rather the oter way around.
+ * This hack works, prints the panic message twice,
+ * and it enables reboot timers!
+ */
+ panic(msg);
}
void handle_interruption(int code, struct pt_regs *regs)
else
local_irq_enable();
+ /* Security check:
+ * If the priority level is still user, and the
+ * faulting space is not equal to the active space
+ * then the user is attempting something in a space
+ * that does not belong to them. Kill the process.
+ *
+ * This is normally the situation when the user
+ * attempts to jump into the kernel space at the
+ * wrong offset, be it at the gateway page or a
+ * random location.
+ *
+ * We cannot normally signal the process because it
+ * could *be* on the gateway page, and processes
+ * executing on the gateway page can't have signals
+ * delivered.
+ *
+ * We merely readjust the address into the users
+ * space, at a destination address of zero, and
+ * allow processing to continue.
+ */
+ if (((unsigned long)regs->iaoq[0] & 3) &&
+ ((unsigned long)regs->iasq[0] != (unsigned long)regs->sr[7])) {
+ /* Kill the user process later */
+ regs->iaoq[0] = 0 | 3;
+ regs->iaoq[1] = regs->iaoq[0] + 4;
+ regs->iasq[0] = regs->iasq[0] = regs->sr[7];
+ regs->gr[0] &= ~PSW_B;
+ return;
+ }
+
#if 0
printk(KERN_CRIT "Interruption # %d\n", code);
#endif
case 3:
/* Recovery counter trap */
regs->gr[0] &= ~PSW_R;
- if (regs->iasq[0])
+ if (user_space(regs))
handle_gdb_break(regs, TRAP_TRACE);
/* else this must be the start of a syscall - just let it run */
return;
/* Set to zero, and let the userspace app figure it out from
the insn pointed to by si_addr */
si.si_code = 0;
- si.si_addr = (void *) regs->iaoq[0];
+ si.si_addr = (void __user *) regs->iaoq[0];
force_sig_info(SIGFPE, &si, current);
return;
- } else
- /* The kernel doesn't want to handle condition codes */
- break;
+ }
+ /* The kernel doesn't want to handle condition codes */
+ break;
case 14:
/* Assist Exception Trap, i.e. floating point exception. */
/* Fall through */
case 17:
/* Non-access data TLB miss fault/Non-access data page fault */
- /* TODO: Still need to add slow path emulation code here */
- /* TODO: Understand what is meant by the TODO listed
- above this one. (Carlos) */
+ /* FIXME:
+ Still need to add slow path emulation code here!
+ If the insn used a non-shadow register, then the tlb
+ handlers could not have their side-effect (e.g. probe
+ writing to a target register) emulated since rfir would
+ erase the changes to said register. Instead we have to
+ setup everything, call this function we are in, and emulate
+ by hand. Technically we need to emulate:
+ fdc,fdce,pdc,"fic,4f",prober,probeir,probew, probeiw
+ */
fault_address = regs->ior;
fault_space = regs->isr;
break;
case 25:
/* Taken branch trap */
regs->gr[0] &= ~PSW_T;
- if (regs->iasq[0])
+ if (user_space(regs))
handle_gdb_break(regs, TRAP_BRANCH);
/* else this must be the start of a syscall - just let it
* run.
git://git.onelab.eu / linux-2.6.git / blobdiff