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Diffstat (limited to 'arch/i386/kernel/traps.c')
-rw-r--r--arch/i386/kernel/traps.c27
1 files changed, 15 insertions, 12 deletions
diff --git a/arch/i386/kernel/traps.c b/arch/i386/kernel/traps.c
index cd2d5d5..09a58cb 100644
--- a/arch/i386/kernel/traps.c
+++ b/arch/i386/kernel/traps.c
@@ -210,7 +210,7 @@ void show_registers(struct pt_regs *regs)
unsigned short ss;
esp = (unsigned long) (&regs->esp);
- ss = __KERNEL_DS;
+ savesegment(ss, ss);
if (user_mode(regs)) {
in_kernel = 0;
esp = regs->esp;
@@ -267,9 +267,6 @@ static void handle_BUG(struct pt_regs *regs)
char c;
unsigned long eip;
- if (user_mode(regs))
- goto no_bug; /* Not in kernel */
-
eip = regs->eip;
if (eip < PAGE_OFFSET)
@@ -366,8 +363,9 @@ static inline void die_if_kernel(const char * str, struct pt_regs * regs, long e
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;
@@ -463,7 +461,8 @@ DO_ERROR(12, SIGBUS, "stack segment", stack_segment)
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);
@@ -568,6 +567,10 @@ static DEFINE_SPINLOCK(nmi_print_lock);
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
@@ -656,7 +659,7 @@ fastcall void do_nmi(struct pt_regs * regs, long error_code)
++nmi_count(cpu);
- if (!nmi_callback(regs, cpu))
+ if (!rcu_dereference(nmi_callback)(regs, cpu))
default_do_nmi(regs);
nmi_exit();
@@ -664,7 +667,7 @@ fastcall void do_nmi(struct pt_regs * regs, long error_code)
void set_nmi_callback(nmi_callback_t callback)
{
- nmi_callback = callback;
+ rcu_assign_pointer(nmi_callback, callback);
}
EXPORT_SYMBOL_GPL(set_nmi_callback);
@@ -675,7 +678,7 @@ void unset_nmi_callback(void)
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)
@@ -709,7 +712,7 @@ fastcall void do_int3(struct pt_regs *regs, long error_code)
* 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;
@@ -1008,7 +1011,7 @@ void __init trap_init_f00f_bug(void)
* 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
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