196 lines
4.4 KiB
C
196 lines
4.4 KiB
C
/*
|
|
* Copyright (C) 2003-2006, Axis Communications AB.
|
|
*/
|
|
|
|
#include <linux/ptrace.h>
|
|
#include <linux/module.h>
|
|
#include <asm/uaccess.h>
|
|
#include <hwregs/supp_reg.h>
|
|
#include <hwregs/intr_vect_defs.h>
|
|
#include <asm/irq.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();
|
|
unsigned long d_mmu_cause;
|
|
unsigned long i_mmu_cause;
|
|
|
|
printk("CPU: %d\n", smp_processor_id());
|
|
|
|
printk("ERP: %08lx SRP: %08lx CCS: %08lx USP: %08lx MOF: %08lx\n",
|
|
regs->erp, regs->srp, regs->ccs, 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 acr: %08lx\n",
|
|
regs->r12, regs->r13, regs->orig_r10, regs->acr);
|
|
|
|
printk(" sp: %08lx\n", (unsigned long)regs);
|
|
|
|
SUPP_BANK_SEL(BANK_IM);
|
|
SUPP_REG_RD(RW_MM_CAUSE, i_mmu_cause);
|
|
|
|
SUPP_BANK_SEL(BANK_DM);
|
|
SUPP_REG_RD(RW_MM_CAUSE, d_mmu_cause);
|
|
|
|
printk(" Data MMU Cause: %08lx\n", d_mmu_cause);
|
|
printk("Instruction MMU Cause: %08lx\n", i_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->erp < PAGE_OFFSET)
|
|
goto bad_value;
|
|
|
|
/*
|
|
* Quite often the value at regs->erp 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->erp
|
|
* 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->erp)[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)
|
|
{
|
|
unsigned long flags;
|
|
|
|
local_save_flags(flags);
|
|
flags |= (1 << 30); /* NMI M flag is at bit 30 */
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
extern void (*nmi_handler)(struct pt_regs *);
|
|
void handle_nmi(struct pt_regs *regs)
|
|
{
|
|
#ifdef CONFIG_ETRAXFS
|
|
reg_intr_vect_r_nmi r;
|
|
#endif
|
|
|
|
if (nmi_handler)
|
|
nmi_handler(regs);
|
|
|
|
#ifdef CONFIG_ETRAXFS
|
|
/* Wait until nmi is no longer active. */
|
|
do {
|
|
r = REG_RD(intr_vect, regi_irq, r_nmi);
|
|
} while (r.ext == regk_intr_vect_on);
|
|
#endif
|
|
}
|
|
|
|
|
|
#ifdef CONFIG_BUG
|
|
extern void die_if_kernel(const char *str, struct pt_regs *regs, long err);
|
|
|
|
/* Copy of the regs at BUG() time. */
|
|
struct pt_regs BUG_regs;
|
|
|
|
void do_BUG(char *file, unsigned int line)
|
|
{
|
|
printk("kernel BUG at %s:%d!\n", file, line);
|
|
die_if_kernel("Oops", &BUG_regs, 0);
|
|
}
|
|
EXPORT_SYMBOL(do_BUG);
|
|
|
|
void fixup_BUG(struct pt_regs *regs)
|
|
{
|
|
BUG_regs = *regs;
|
|
|
|
#ifdef CONFIG_DEBUG_BUGVERBOSE
|
|
/*
|
|
* Fixup the BUG arguments through exception handlers.
|
|
*/
|
|
{
|
|
const struct exception_table_entry *fixup;
|
|
|
|
/*
|
|
* ERP points at the "break 14" + 2, compensate for the 2
|
|
* bytes.
|
|
*/
|
|
fixup = search_exception_tables(instruction_pointer(regs) - 2);
|
|
if (fixup) {
|
|
/* Adjust the instruction pointer in the stackframe. */
|
|
instruction_pointer(regs) = fixup->fixup;
|
|
arch_fixup(regs);
|
|
}
|
|
}
|
|
#else
|
|
/* Dont try to lookup the filename + line, just dump regs. */
|
|
do_BUG("unknown", 0);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Break 14 handler. Save regs and jump into the fixup_BUG.
|
|
*/
|
|
__asm__ ( ".text\n\t"
|
|
".global breakh_BUG\n\t"
|
|
"breakh_BUG:\n\t"
|
|
SAVE_ALL
|
|
KGDB_FIXUP
|
|
"move.d $sp, $r10\n\t"
|
|
"jsr fixup_BUG\n\t"
|
|
"nop\n\t"
|
|
"jump ret_from_intr\n\t"
|
|
"nop\n\t");
|
|
|
|
|
|
#ifdef CONFIG_DEBUG_BUGVERBOSE
|
|
void
|
|
handle_BUG(struct pt_regs *regs)
|
|
{
|
|
}
|
|
#endif
|
|
#endif
|