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Diffstat (limited to 'arch/i386/kernel/traps.c')
-rw-r--r--arch/i386/kernel/traps.c86
1 files changed, 67 insertions, 19 deletions
diff --git a/arch/i386/kernel/traps.c b/arch/i386/kernel/traps.c
index 90da0575fcff..47b0bef335bd 100644
--- a/arch/i386/kernel/traps.c
+++ b/arch/i386/kernel/traps.c
@@ -41,6 +41,10 @@
#include <linux/mca.h>
#endif
+#if defined(CONFIG_EDAC)
+#include <linux/edac.h>
+#endif
+
#include <asm/processor.h>
#include <asm/system.h>
#include <asm/io.h>
@@ -96,36 +100,45 @@ asmlinkage void machine_check(void);
int kstack_depth_to_print = 24;
static unsigned int code_bytes = 64;
-static inline int valid_stack_ptr(struct thread_info *tinfo, void *p)
+static inline int valid_stack_ptr(struct thread_info *tinfo, void *p, unsigned size)
{
return p > (void *)tinfo &&
- p < (void *)tinfo + THREAD_SIZE - 3;
+ p <= (void *)tinfo + THREAD_SIZE - size;
}
+/* The form of the top of the frame on the stack */
+struct stack_frame {
+ struct stack_frame *next_frame;
+ unsigned long return_address;
+};
+
static inline unsigned long print_context_stack(struct thread_info *tinfo,
unsigned long *stack, unsigned long ebp,
struct stacktrace_ops *ops, void *data)
{
- unsigned long addr;
-
#ifdef CONFIG_FRAME_POINTER
- while (valid_stack_ptr(tinfo, (void *)ebp)) {
- unsigned long new_ebp;
- addr = *(unsigned long *)(ebp + 4);
+ struct stack_frame *frame = (struct stack_frame *)ebp;
+ while (valid_stack_ptr(tinfo, frame, sizeof(*frame))) {
+ struct stack_frame *next;
+ unsigned long addr;
+
+ addr = frame->return_address;
ops->address(data, addr);
/*
* break out of recursive entries (such as
* end_of_stack_stop_unwind_function). Also,
* we can never allow a frame pointer to
* move downwards!
- */
- new_ebp = *(unsigned long *)ebp;
- if (new_ebp <= ebp)
+ */
+ next = frame->next_frame;
+ if (next <= frame)
break;
- ebp = new_ebp;
+ frame = next;
}
#else
- while (valid_stack_ptr(tinfo, stack)) {
+ while (valid_stack_ptr(tinfo, stack, sizeof(*stack))) {
+ unsigned long addr;
+
addr = *stack++;
if (__kernel_text_address(addr))
ops->address(data, addr);
@@ -148,7 +161,7 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs,
if (!stack) {
unsigned long dummy;
stack = &dummy;
- if (task && task != current)
+ if (task != current)
stack = (unsigned long *)task->thread.esp;
}
@@ -207,6 +220,7 @@ static void print_trace_address(void *data, unsigned long addr)
{
printk("%s [<%08lx>] ", (char *)data, addr);
print_symbol("%s\n", addr);
+ touch_nmi_watchdog();
}
static struct stacktrace_ops print_trace_ops = {
@@ -390,7 +404,7 @@ void die(const char * str, struct pt_regs * regs, long err)
unsigned long esp;
unsigned short ss;
- report_bug(regs->eip);
+ report_bug(regs->eip, regs);
printk(KERN_EMERG "%s: %04lx [#%d]\n", str, err & 0xffff, ++die_counter);
#ifdef CONFIG_PREEMPT
@@ -433,6 +447,7 @@ void die(const char * str, struct pt_regs * regs, long err)
bust_spinlocks(0);
die.lock_owner = -1;
+ add_taint(TAINT_DIE);
spin_unlock_irqrestore(&die.lock, flags);
if (!regs)
@@ -517,10 +532,12 @@ fastcall void do_##name(struct pt_regs * regs, long error_code) \
do_trap(trapnr, signr, str, 0, regs, error_code, NULL); \
}
-#define DO_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr) \
+#define DO_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr, irq) \
fastcall void do_##name(struct pt_regs * regs, long error_code) \
{ \
siginfo_t info; \
+ if (irq) \
+ local_irq_enable(); \
info.si_signo = signr; \
info.si_errno = 0; \
info.si_code = sicode; \
@@ -560,13 +577,13 @@ DO_VM86_ERROR( 3, SIGTRAP, "int3", int3)
#endif
DO_VM86_ERROR( 4, SIGSEGV, "overflow", overflow)
DO_VM86_ERROR( 5, SIGSEGV, "bounds", bounds)
-DO_ERROR_INFO( 6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->eip)
+DO_ERROR_INFO( 6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->eip, 0)
DO_ERROR( 9, SIGFPE, "coprocessor segment overrun", coprocessor_segment_overrun)
DO_ERROR(10, SIGSEGV, "invalid TSS", invalid_TSS)
DO_ERROR(11, SIGBUS, "segment not present", segment_not_present)
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)
+DO_ERROR_INFO(17, SIGBUS, "alignment check", alignment_check, BUS_ADRALN, 0, 0)
+DO_ERROR_INFO(32, SIGSEGV, "iret exception", iret_error, ILL_BADSTK, 0, 1)
fastcall void __kprobes do_general_protection(struct pt_regs * regs,
long error_code)
@@ -610,6 +627,13 @@ fastcall void __kprobes do_general_protection(struct pt_regs * regs,
current->thread.error_code = error_code;
current->thread.trap_no = 13;
+ if (show_unhandled_signals && unhandled_signal(current, SIGSEGV) &&
+ printk_ratelimit())
+ printk(KERN_INFO
+ "%s[%d] general protection eip:%lx esp:%lx error:%lx\n",
+ current->comm, current->pid,
+ regs->eip, regs->esp, error_code);
+
force_sig(SIGSEGV, current);
return;
@@ -635,6 +659,14 @@ mem_parity_error(unsigned char reason, struct pt_regs * regs)
printk(KERN_EMERG "Uhhuh. NMI received for unknown reason %02x on "
"CPU %d.\n", reason, smp_processor_id());
printk(KERN_EMERG "You have some hardware problem, likely on the PCI bus.\n");
+
+#if defined(CONFIG_EDAC)
+ if(edac_handler_set()) {
+ edac_atomic_assert_error();
+ return;
+ }
+#endif
+
if (panic_on_unrecovered_nmi)
panic("NMI: Not continuing");
@@ -752,6 +784,8 @@ static __kprobes void default_do_nmi(struct pt_regs * regs)
reassert_nmi();
}
+static int ignore_nmis;
+
fastcall __kprobes void do_nmi(struct pt_regs * regs, long error_code)
{
int cpu;
@@ -762,11 +796,24 @@ fastcall __kprobes void do_nmi(struct pt_regs * regs, long error_code)
++nmi_count(cpu);
- default_do_nmi(regs);
+ if (!ignore_nmis)
+ default_do_nmi(regs);
nmi_exit();
}
+void stop_nmi(void)
+{
+ acpi_nmi_disable();
+ ignore_nmis++;
+}
+
+void restart_nmi(void)
+{
+ ignore_nmis--;
+ acpi_nmi_enable();
+}
+
#ifdef CONFIG_KPROBES
fastcall void __kprobes do_int3(struct pt_regs *regs, long error_code)
{
@@ -1053,6 +1100,7 @@ asmlinkage void math_state_restore(void)
thread->status |= TS_USEDFPU; /* So we fnsave on switch_to() */
tsk->fpu_counter++;
}
+EXPORT_SYMBOL_GPL(math_state_restore);
#ifndef CONFIG_MATH_EMULATION
generated by cgit v1.2.3 (git 2.0.4) at 2024-05-24 21:29:51 +0000