1 files changed, 132 insertions, 0 deletions

diff --git a/arch/cris/arch-v10/kernel/traps.c b/arch/cris/arch-v10/kernel/traps.c
new file mode 100644
index 000000000000..da491f438a6e
--- /dev/null
+++ b/arch/cris/arch-v10/kernel/traps.c
@@ -0,0 +1,132 @@
+/* $Id: traps.c,v 1.2 2003/07/04 08:27:41 starvik Exp $
+ *
+ *  linux/arch/cris/arch-v10/traps.c
+ *
+ *  Heler functions for trap handlers
+ * 
+ *  Copyright (C) 2000-2002 Axis Communications AB
+ *
+ *  Authors:   Bjorn Wesen
+ *             Hans-Peter Nilsson
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/ptrace.h>
+#include <asm/uaccess.h>
+#include <asm/arch/sv_addr_ag.h>
+
+void 
+show_registers(struct pt_regs * regs)
+{
+        /* We either use rdusp() - the USP register, which might not
+           correspond to the current process for all cases we're called,
+           or we use the current->thread.usp, which is not up to date for
+           the current process.  Experience shows we want the USP
+           register.  */
+        unsigned long usp = rdusp();
+
+        printk("IRP: %08lx SRP: %08lx DCCR: %08lx USP: %08lx MOF: %08lx\n",
+               regs->irp, regs->srp, regs->dccr, usp, regs->mof );
+        printk(" r0: %08lx  r1: %08lx   r2: %08lx  r3: %08lx\n",
+               regs->r0, regs->r1, regs->r2, regs->r3);
+        printk(" r4: %08lx  r5: %08lx   r6: %08lx  r7: %08lx\n",
+               regs->r4, regs->r5, regs->r6, regs->r7);
+        printk(" r8: %08lx  r9: %08lx  r10: %08lx r11: %08lx\n",
+               regs->r8, regs->r9, regs->r10, regs->r11);
+        printk("r12: %08lx r13: %08lx oR10: %08lx\n",
+               regs->r12, regs->r13, regs->orig_r10);
+        printk("R_MMU_CAUSE: %08lx\n", (unsigned long)*R_MMU_CAUSE);
+        printk("Process %s (pid: %d, stackpage=%08lx)\n",
+               current->comm, current->pid, (unsigned long)current);
+
+        /*
+         * When in-kernel, we also print out the stack and code at the
+         * time of the fault..
+         */
+        if (! user_mode(regs)) {
+                int i;
+
+                show_stack(NULL, (unsigned long*)usp);
+
+                /* Dump kernel stack if the previous dump wasn't one.  */
+                if (usp != 0)
+                        show_stack (NULL, NULL);
+
+                printk("\nCode: ");
+                if(regs->irp < PAGE_OFFSET)
+                        goto bad;
+
+                /* Often enough the value at regs->irp does not point to
+                   the interesting instruction, which is most often the
+                   _previous_ instruction.  So we dump at an offset large
+                   enough that instruction decoding should be in sync at
+                   the interesting point, but small enough to fit on a row
+                   (sort of).  We point out the regs->irp location in a
+                   ksymoops-friendly way by wrapping the byte for that
+                   address in parentheses.  */
+                for(i = -12; i < 12; i++)
+                {
+                        unsigned char c;
+                        if(__get_user(c, &((unsigned char*)regs->irp)[i])) {
+bad:
+                                printk(" Bad IP value.");
+                                break;
+                        }
+
+                        if (i == 0)
+                          printk("(%02x) ", c);
+                        else
+                          printk("%02x ", c);
+                }
+                printk("\n");
+        }
+}
+
+/* Called from entry.S when the watchdog has bitten
+ * We print out something resembling an oops dump, and if
+ * we have the nice doggy development flag set, we halt here
+ * instead of rebooting.
+ */
+
+extern void reset_watchdog(void);
+extern void stop_watchdog(void);
+
+
+void
+watchdog_bite_hook(struct pt_regs *regs)
+{
+#ifdef CONFIG_ETRAX_WATCHDOG_NICE_DOGGY
+        local_irq_disable();
+        stop_watchdog();
+        show_registers(regs);
+        while(1) /* nothing */;
+#else
+        show_registers(regs);
+#endif  
+}
+
+/* This is normally the 'Oops' routine */
+void 
+die_if_kernel(const char * str, struct pt_regs * regs, long err)
+{
+        if(user_mode(regs))
+                return;
+
+#ifdef CONFIG_ETRAX_WATCHDOG_NICE_DOGGY
+        /* This printout might take too long and trigger the 
+         * watchdog normally. If we're in the nice doggy
+         * development mode, stop the watchdog during printout.
+         */
+        stop_watchdog();
+#endif
+
+        printk("%s: %04lx\n", str, err & 0xffff);
+
+        show_registers(regs);
+
+#ifdef CONFIG_ETRAX_WATCHDOG_NICE_DOGGY
+        reset_watchdog();
+#endif
+        do_exit(SIGSEGV);
+}