mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-03 17:40:04 +00:00
arch/tile: add descriptive text if the kernel reports a bad trap
If the kernel unexpectedly takes a bad trap, it's convenient to have it report the type of trap as part of the error. This gives customers a bit more context before they call up customer support. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
This commit is contained in:
parent
8703d6e0fc
commit
c6f696f69a
1 changed files with 28 additions and 2 deletions
|
@ -195,6 +195,25 @@ static int special_ill(bundle_bits bundle, int *sigp, int *codep)
|
|||
return 1;
|
||||
}
|
||||
|
||||
static const char *const int_name[] = {
|
||||
[INT_MEM_ERROR] = "Memory error",
|
||||
[INT_ILL] = "Illegal instruction",
|
||||
[INT_GPV] = "General protection violation",
|
||||
[INT_UDN_ACCESS] = "UDN access",
|
||||
[INT_IDN_ACCESS] = "IDN access",
|
||||
#if CHIP_HAS_SN()
|
||||
[INT_SN_ACCESS] = "SN access",
|
||||
#endif
|
||||
[INT_SWINT_3] = "Software interrupt 3",
|
||||
[INT_SWINT_2] = "Software interrupt 2",
|
||||
[INT_SWINT_0] = "Software interrupt 0",
|
||||
[INT_UNALIGN_DATA] = "Unaligned data",
|
||||
[INT_DOUBLE_FAULT] = "Double fault",
|
||||
#ifdef __tilegx__
|
||||
[INT_ILL_TRANS] = "Illegal virtual address",
|
||||
#endif
|
||||
};
|
||||
|
||||
void __kprobes do_trap(struct pt_regs *regs, int fault_num,
|
||||
unsigned long reason)
|
||||
{
|
||||
|
@ -211,10 +230,17 @@ void __kprobes do_trap(struct pt_regs *regs, int fault_num,
|
|||
* current process and hope for the best.
|
||||
*/
|
||||
if (!user_mode(regs)) {
|
||||
const char *name;
|
||||
if (fixup_exception(regs)) /* only UNALIGN_DATA in practice */
|
||||
return;
|
||||
pr_alert("Kernel took bad trap %d at PC %#lx\n",
|
||||
fault_num, regs->pc);
|
||||
if (fault_num >= 0 &&
|
||||
fault_num < sizeof(int_name)/sizeof(int_name[0]) &&
|
||||
int_name[fault_num] != NULL)
|
||||
name = int_name[fault_num];
|
||||
else
|
||||
name = "Unknown interrupt";
|
||||
pr_alert("Kernel took bad trap %d (%s) at PC %#lx\n",
|
||||
fault_num, name, regs->pc);
|
||||
if (fault_num == INT_GPV)
|
||||
pr_alert("GPV_REASON is %#lx\n", reason);
|
||||
show_regs(regs);
|
||||
|
|
Loading…
Reference in a new issue