1 /* $Id: traps.c,v 1.2 2003/07/04 08:27:41 starvik Exp $
3 * linux/arch/cris/arch-v10/traps.c
5 * Heler functions for trap handlers
7 * Copyright (C) 2000-2002 Axis Communications AB
14 #include <linux/config.h>
15 #include <linux/ptrace.h>
16 #include <asm/uaccess.h>
17 #include <asm/arch/sv_addr_ag.h>
20 show_registers(struct pt_regs * regs)
22 /* We either use rdusp() - the USP register, which might not
23 correspond to the current process for all cases we're called,
24 or we use the current->thread.usp, which is not up to date for
25 the current process. Experience shows we want the USP
27 unsigned long usp = rdusp();
29 printk("IRP: %08lx SRP: %08lx DCCR: %08lx USP: %08lx MOF: %08lx\n",
30 regs->irp, regs->srp, regs->dccr, usp, regs->mof );
31 printk(" r0: %08lx r1: %08lx r2: %08lx r3: %08lx\n",
32 regs->r0, regs->r1, regs->r2, regs->r3);
33 printk(" r4: %08lx r5: %08lx r6: %08lx r7: %08lx\n",
34 regs->r4, regs->r5, regs->r6, regs->r7);
35 printk(" r8: %08lx r9: %08lx r10: %08lx r11: %08lx\n",
36 regs->r8, regs->r9, regs->r10, regs->r11);
37 printk("r12: %08lx r13: %08lx oR10: %08lx\n",
38 regs->r12, regs->r13, regs->orig_r10);
39 printk("R_MMU_CAUSE: %08lx\n", (unsigned long)*R_MMU_CAUSE);
40 printk("Process %s (pid: %d, stackpage=%08lx)\n",
41 current->comm, current->pid, (unsigned long)current);
44 * When in-kernel, we also print out the stack and code at the
47 if (! user_mode(regs)) {
50 show_stack(NULL, (unsigned long*)usp);
52 /* Dump kernel stack if the previous dump wasn't one. */
54 show_stack (NULL, NULL);
57 if(regs->irp < PAGE_OFFSET)
60 /* Often enough the value at regs->irp does not point to
61 the interesting instruction, which is most often the
62 _previous_ instruction. So we dump at an offset large
63 enough that instruction decoding should be in sync at
64 the interesting point, but small enough to fit on a row
65 (sort of). We point out the regs->irp location in a
66 ksymoops-friendly way by wrapping the byte for that
67 address in parentheses. */
68 for(i = -12; i < 12; i++)
71 if(__get_user(c, &((unsigned char*)regs->irp)[i])) {
73 printk(" Bad IP value.");
86 /* Called from entry.S when the watchdog has bitten
87 * We print out something resembling an oops dump, and if
88 * we have the nice doggy development flag set, we halt here
89 * instead of rebooting.
92 extern void reset_watchdog(void);
93 extern void stop_watchdog(void);
97 watchdog_bite_hook(struct pt_regs *regs)
99 #ifdef CONFIG_ETRAX_WATCHDOG_NICE_DOGGY
102 show_registers(regs);
103 while(1) /* nothing */;
105 show_registers(regs);
109 /* This is normally the 'Oops' routine */
111 die_if_kernel(const char * str, struct pt_regs * regs, long err)
116 #ifdef CONFIG_ETRAX_WATCHDOG_NICE_DOGGY
117 /* This printout might take too long and trigger the
118 * watchdog normally. If we're in the nice doggy
119 * development mode, stop the watchdog during printout.
124 printk("%s: %04lx\n", str, err & 0xffff);
126 show_registers(regs);
128 #ifdef CONFIG_ETRAX_WATCHDOG_NICE_DOGGY