132 lines
3.3 KiB
C
132 lines
3.3 KiB
C
|
/*
|
||
|
|
* Helper functions for trap handlers
|
||
|
|
*
|
||
|
|
* Copyright (C) 2000-2007, Axis Communications AB.
|
||
|
|
*
|
||
|
|
* Authors: Bjorn Wesen
|
||
|
|
* Hans-Peter Nilsson
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/ptrace.h>
|
||
|
|
#include <asm/uaccess.h>
|
||
|
|
#include <arch/sv_addr_ag.h>
|
||
|
|
#include <arch/system.h>
|
||
|
|
|
||
|
|
void
|
||
|
|
show_registers(struct pt_regs *regs)
|
||
|
|
{
|
||
|
|
/*
|
||
|
|
* It's possible to use either the USP register or current->thread.usp.
|
||
|
|
* USP might not correspond to the current process for all cases this
|
||
|
|
* function is called, and current->thread.usp isn't up to date for the
|
||
|
|
* current process. Experience shows that using USP is the way to go.
|
||
|
|
*/
|
||
|
|
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 sp: %08lx\n",
|
||
|
|
regs->r12, regs->r13, regs->orig_r10, (long unsigned)regs);
|
||
|
|
|
||
|
|
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);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* If the previous stack-dump wasn't a kernel one, dump the
|
||
|
|
* kernel stack now.
|
||
|
|
*/
|
||
|
|
if (usp != 0)
|
||
|
|
show_stack(NULL, NULL);
|
||
|
|
|
||
|
|
printk("\nCode: ");
|
||
|
|
|
||
|
|
if (regs->irp < PAGE_OFFSET)
|
||
|
|
goto bad_value;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Quite often the value at regs->irp doesn't point to the
|
||
|
|
* interesting instruction, which often is the previous
|
||
|
|
* instruction. So dump at an offset large enough that the
|
||
|
|
* instruction decoding should be in sync at the interesting
|
||
|
|
* point, but small enough to fit on a row. The regs->irp
|
||
|
|
* location is pointed out in a ksymoops-friendly way by
|
||
|
|
* wrapping the byte for that address in parenthesises.
|
||
|
|
*/
|
||
|
|
for (i = -12; i < 12; i++) {
|
||
|
|
unsigned char c;
|
||
|
|
|
||
|
|
if (__get_user(c, &((unsigned char *)regs->irp)[i])) {
|
||
|
|
bad_value:
|
||
|
|
printk(" Bad IP value.");
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (i == 0)
|
||
|
|
printk("(%02x) ", c);
|
||
|
|
else
|
||
|
|
printk("%02x ", c);
|
||
|
|
}
|
||
|
|
printk("\n");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void
|
||
|
|
arch_enable_nmi(void)
|
||
|
|
{
|
||
|
|
asm volatile ("setf m");
|
||
|
|
}
|
||
|
|
|
||
|
|
extern void (*nmi_handler)(struct pt_regs *);
|
||
|
|
void handle_nmi(struct pt_regs *regs)
|
||
|
|
{
|
||
|
|
if (nmi_handler)
|
||
|
|
nmi_handler(regs);
|
||
|
|
|
||
|
|
/* Wait until nmi is no longer active. (We enable NMI immediately after
|
||
|
|
returning from this function, and we don't want it happening while
|
||
|
|
exiting from the NMI interrupt handler.) */
|
||
|
|
while (*R_IRQ_MASK0_RD & IO_STATE(R_IRQ_MASK0_RD, nmi_pin, active))
|
||
|
|
;
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifdef CONFIG_DEBUG_BUGVERBOSE
|
||
|
|
void
|
||
|
|
handle_BUG(struct pt_regs *regs)
|
||
|
|
{
|
||
|
|
struct bug_frame f;
|
||
|
|
unsigned char c;
|
||
|
|
unsigned long irp = regs->irp;
|
||
|
|
|
||
|
|
if (__copy_from_user(&f, (const void __user *)(irp - 8), sizeof f))
|
||
|
|
return;
|
||
|
|
if (f.prefix != BUG_PREFIX || f.magic != BUG_MAGIC)
|
||
|
|
return;
|
||
|
|
if (__get_user(c, f.filename))
|
||
|
|
f.filename = "<bad filename>";
|
||
|
|
|
||
|
|
printk("kernel BUG at %s:%d!\n", f.filename, f.line);
|
||
|
|
}
|
||
|
|
#endif
|