--- linux-mm/arch/i386/Kconfig	2004-02-16 23:15:53.000000000 +0100
+++ clean-mm/arch/i386/Kconfig	2004-02-16 23:00:15.000000000 +0100
@@ -1267,6 +1267,23 @@
 	  http://kgdb.sourceforge.net
 	  This is only useful for kernel hackers. If unsure, say N.
 
+config KGDB_THREAD
+	bool "KGDB: Thread analysis"
+	depends on KGDB
+	help
+	  With thread analysis enabled, gdb can talk to kgdb stub to list
+	  threads and to get stack trace for a thread. This option also enables
+	  some code which helps gdb get exact status of thread. Thread analysis
+	  adds some overhead to schedule and down functions. You can disable
+	  this option if you do not want to compromise on speed.
+
+config KGDB_CONSOLE
+	bool "KGDB: Console messages through gdb"
+	depends on KGDB
+	help
+	  If you say Y here, console messages will appear through gdb.
+	  Other consoles such as tty or ttyS will continue to work as usual.
+
 config FRAME_POINTER
 	bool "Compile the kernel with frame pointers"
 	help
--- linux-mm/arch/i386/kernel/entry.S	2004-02-17 23:23:55.000000000 +0100
+++ clean-mm/arch/i386/kernel/entry.S	2004-02-16 23:00:15.000000000 +0100
@@ -226,7 +226,7 @@
 	jz restore_all
 	movl $PREEMPT_ACTIVE,TI_PRE_COUNT(%ebp)
 	sti
-	call schedule
+	call user_schedule
 	movl $0,TI_PRE_COUNT(%ebp)
 	cli
 	jmp need_resched
@@ -308,7 +308,7 @@
 	testb $_TIF_NEED_RESCHED, %cl
 	jz work_notifysig
 work_resched:
-	call schedule
+	call user_schedule
 	cli				# make sure we don't miss an interrupt
 					# setting need_resched or sigpending
 					# between sampling and the iret
@@ -399,7 +399,17 @@
 	ALIGN
 common_interrupt:
 	SAVE_ALL
+	movl %esp, %eax
+/* Create a fake function call followed by a fake function prologue to fool
+ * gdb into believing that this is a normal function call. */
+	pushl EIP(%eax)
+
+common_interrupt_1:
+	pushl %ebp
+	movl %esp, %ebp
+	pushl %eax
 	call do_IRQ
+	addl $12, %esp
 	jmp ret_from_intr
 
 #define BUILD_INTERRUPT(name, nr)	\
@@ -606,6 +616,31 @@
 	pushl $do_spurious_interrupt_bug
 	jmp error_code
 
+#ifdef CONFIG_KGDB_THREAD
+ENTRY(kern_schedule)
+	pushl	%ebp
+	movl	%esp, %ebp
+	pushl	%ss		
+	pushl	%ebp
+	pushfl
+	pushl	%cs
+	pushl	4(%ebp)
+	pushl	%eax		
+	pushl	%es
+	pushl	%ds
+	pushl	%eax
+	pushl	(%ebp)
+	pushl	%edi
+	pushl	%esi
+	pushl	%edx
+	pushl	%ecx
+	pushl	%ebx
+	call	kern_do_schedule
+	movl	%ebp, %esp
+	pop	%ebp
+	ret
+#endif
+
 .data
 ENTRY(sys_call_table)
 	.long sys_restart_syscall	/* 0 - old "setup()" system call, used for restarting */
--- linux-mm/arch/i386/kernel/irq.c	2004-02-17 23:23:55.000000000 +0100
+++ clean-mm/arch/i386/kernel/irq.c	2004-02-16 23:00:15.000000000 +0100
@@ -410,7 +410,7 @@
  * SMP cross-CPU interrupts have their own specific
  * handlers).
  */
-asmlinkage unsigned int do_IRQ(struct pt_regs regs)
+asmlinkage unsigned int do_IRQ(struct pt_regs *regs)
 {	
 	/* 
 	 * We ack quickly, we don't want the irq controller
@@ -422,7 +422,7 @@
 	 * 0 return value means that this irq is already being
 	 * handled by some other CPU. (or is disabled)
 	 */
-	int irq = regs.orig_eax & 0xff; /* high bits used in ret_from_ code  */
+	int irq = regs->orig_eax & 0xff; /* high bits used in ret_from_ code  */
 	irq_desc_t *desc = irq_desc + irq;
 	struct irqaction * action;
 	unsigned int status;
@@ -488,7 +488,7 @@
 		irqreturn_t action_ret;
 
 		spin_unlock(&desc->lock);
-		action_ret = handle_IRQ_event(irq, &regs, action);
+		action_ret = handle_IRQ_event(irq, regs, action);
 		spin_lock(&desc->lock);
 		if (!noirqdebug)
 			note_interrupt(irq, desc, action_ret);