#include <linux/ptrace.h>
#include <linux/utsname.h>
#include <linux/kprobes.h>
+#include <linux/kexec.h>
#ifdef CONFIG_EISA
#include <linux/ioport.h>
unsigned short ss;
esp = (unsigned long) (®s->esp);
- ss = __KERNEL_DS;
+ savesegment(ss, ss);
if (user_mode(regs)) {
in_kernel = 0;
esp = regs->esp;
* time of the fault..
*/
if (in_kernel) {
- u8 *eip;
+ u8 __user *eip;
printk("\nStack: ");
show_stack(NULL, (unsigned long*)esp);
printk("Code: ");
- eip = (u8 *)regs->eip - 43;
+ eip = (u8 __user *)regs->eip - 43;
for (i = 0; i < 64; i++, eip++) {
unsigned char c;
- if (eip < (u8 *)PAGE_OFFSET || __get_user(c, eip)) {
+ if (eip < (u8 __user *)PAGE_OFFSET || __get_user(c, eip)) {
printk(" Bad EIP value.");
break;
}
- if (eip == (u8 *)regs->eip)
+ if (eip == (u8 __user *)regs->eip)
printk("<%02x> ", c);
else
printk("%02x ", c);
char c;
unsigned long eip;
- if (user_mode(regs))
- goto no_bug; /* Not in kernel */
-
eip = regs->eip;
if (eip < PAGE_OFFSET)
goto no_bug;
- if (__get_user(ud2, (unsigned short *)eip))
+ if (__get_user(ud2, (unsigned short __user *)eip))
goto no_bug;
if (ud2 != 0x0b0f)
goto no_bug;
- if (__get_user(line, (unsigned short *)(eip + 2)))
+ if (__get_user(line, (unsigned short __user *)(eip + 2)))
goto bug;
- if (__get_user(file, (char **)(eip + 4)) ||
+ if (__get_user(file, (char * __user *)(eip + 4)) ||
(unsigned long)file < PAGE_OFFSET || __get_user(c, file))
file = "<bad filename>";
printk("Kernel BUG\n");
}
+/* This is gone through when something in the kernel
+ * has done something bad and is about to be terminated.
+*/
void die(const char * str, struct pt_regs * regs, long err)
{
static struct {
bust_spinlocks(0);
die.lock_owner = -1;
spin_unlock_irq(&die.lock);
+
+ if (kexec_should_crash(current))
+ crash_kexec(regs);
+
if (in_interrupt())
panic("Fatal exception in interrupt");
die(str, regs, err);
}
-static void do_trap(int trapnr, int signr, char *str, int vm86,
- struct pt_regs * regs, long error_code, siginfo_t *info)
+static void __kprobes do_trap(int trapnr, int signr, char *str, int vm86,
+ struct pt_regs * regs, long error_code,
+ siginfo_t *info)
{
+ struct task_struct *tsk = current;
+ tsk->thread.error_code = error_code;
+ tsk->thread.trap_no = trapnr;
+
if (regs->eflags & VM_MASK) {
if (vm86)
goto vm86_trap;
goto kernel_trap;
trap_signal: {
- struct task_struct *tsk = current;
- tsk->thread.error_code = error_code;
- tsk->thread.trap_no = trapnr;
if (info)
force_sig_info(signr, info, tsk);
else
DO_ERROR_INFO(17, SIGBUS, "alignment check", alignment_check, BUS_ADRALN, 0)
DO_ERROR_INFO(32, SIGSEGV, "iret exception", iret_error, ILL_BADSTK, 0)
-fastcall void do_general_protection(struct pt_regs * regs, long error_code)
+fastcall void __kprobes do_general_protection(struct pt_regs * regs,
+ long error_code)
{
int cpu = get_cpu();
struct tss_struct *tss = &per_cpu(init_tss, cpu);
}
put_cpu();
+ current->thread.error_code = error_code;
+ current->thread.trap_no = 13;
+
if (regs->eflags & VM_MASK)
goto gp_in_vm86;
void die_nmi (struct pt_regs *regs, const char *msg)
{
+ if (notify_die(DIE_NMIWATCHDOG, msg, regs, 0, 0, SIGINT) ==
+ NOTIFY_STOP)
+ return;
+
spin_lock(&nmi_print_lock);
/*
* We are in trouble anyway, lets at least try
console_silent();
spin_unlock(&nmi_print_lock);
bust_spinlocks(0);
+
+ /* If we are in kernel we are probably nested up pretty bad
+ * and might aswell get out now while we still can.
+ */
+ if (!user_mode(regs)) {
+ current->thread.trap_no = 2;
+ crash_kexec(regs);
+ }
+
do_exit(SIGSEGV);
}
nmi_enter();
cpu = smp_processor_id();
+
+#ifdef CONFIG_HOTPLUG_CPU
+ if (!cpu_online(cpu)) {
+ nmi_exit();
+ return;
+ }
+#endif
+
++nmi_count(cpu);
- if (!nmi_callback(regs, cpu))
+ if (!rcu_dereference(nmi_callback)(regs, cpu))
default_do_nmi(regs);
nmi_exit();
void set_nmi_callback(nmi_callback_t callback)
{
- nmi_callback = callback;
+ rcu_assign_pointer(nmi_callback, callback);
}
EXPORT_SYMBOL_GPL(set_nmi_callback);
EXPORT_SYMBOL_GPL(unset_nmi_callback);
#ifdef CONFIG_KPROBES
-fastcall void do_int3(struct pt_regs *regs, long error_code)
+fastcall void __kprobes do_int3(struct pt_regs *regs, long error_code)
{
if (notify_die(DIE_INT3, "int3", regs, error_code, 3, SIGTRAP)
== NOTIFY_STOP)
* find every occurrence of the TF bit that could be saved away even
* by user code)
*/
-fastcall void do_debug(struct pt_regs * regs, long error_code)
+fastcall void __kprobes do_debug(struct pt_regs * regs, long error_code)
{
unsigned int condition;
struct task_struct *tsk = current;
*/
cwd = get_fpu_cwd(task);
swd = get_fpu_swd(task);
- switch (((~cwd) & swd & 0x3f) | (swd & 0x240)) {
+ switch (swd & ~cwd & 0x3f) {
case 0x000:
default:
break;
case 0x001: /* Invalid Op */
- case 0x041: /* Stack Fault */
- case 0x241: /* Stack Fault | Direction */
+ /*
+ * swd & 0x240 == 0x040: Stack Underflow
+ * swd & 0x240 == 0x240: Stack Overflow
+ * User must clear the SF bit (0x40) if set
+ */
info.si_code = FPE_FLTINV;
- /* Should we clear the SF or let user space do it ???? */
break;
case 0x002: /* Denormalize */
case 0x010: /* Underflow */
error_code);
return;
}
- die_if_kernel("cache flush denied", regs, error_code);
current->thread.trap_no = 19;
current->thread.error_code = error_code;
+ die_if_kernel("cache flush denied", regs, error_code);
force_sig(SIGSEGV, current);
}
}
* it uses the read-only mapped virtual address.
*/
idt_descr.address = fix_to_virt(FIX_F00F_IDT);
- __asm__ __volatile__("lidt %0" : : "m" (idt_descr));
+ load_idt(&idt_descr);
}
#endif
projects / linux-2.6 / blobdiff