KGDB Support

261 lines not on this page · raw message

1,819 lines not on this page · raw message

Index: linux-2.6.14/kernel/pid.c
===================================================================
@@ -250,8 +250,13 @@ void switch_exec_pids(task_t *leader, ta
 /*
  * The pid hash table is scaled according to the amount of memory in the
  * machine.  From a minimum of 16 slots up to 4096 slots at one gigabyte or
- * more.
+ * more.  KGDB needs to know if this function has been called already,
+ * since we might have entered KGDB very early.
  */
+#ifdef CONFIG_KGDB
+int pidhash_init_done;
+#endif
+
 void __init pidhash_init(void)
 {
 	int i, j, pidhash_size;

@@ -273,6 +278,10 @@ void __init pidhash_init(void)
 		for (j = 0; j < pidhash_size; j++)
 			INIT_HLIST_HEAD(&pid_hash[i][j]);
 	}
+
+#ifdef CONFIG_KGDB
+	pidhash_init_done = 1;
+#endif
 }
 
 void __init pidmap_init(void)

Index: linux-2.6.14/kernel/sched.c
===================================================================
@@ -47,6 +47,7 @@
 #include <linux/syscalls.h>
 #include <linux/times.h>
 #include <linux/acct.h>
+#include <linux/kgdb.h>
 #include <asm/tlb.h>
 
 #include <asm/unistd.h>

@@ -5557,6 +5558,9 @@ void __might_sleep(char *file, int line)
 #if defined(in_atomic)
 	static unsigned long prev_jiffy;	/* ratelimiting */
 
+	if (atomic_read(&debugger_active))
+		return;
+
 	if ((in_atomic() || irqs_disabled()) &&
 	    system_state == SYSTEM_RUNNING && !oops_in_progress) {
 		if (time_before(jiffies, prev_jiffy + HZ) && prev_jiffy)

Index: linux-2.6.14/arch/i386/kernel/kgdb.c
===================================================================
@@ -0,0 +1,300 @@
+/*
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ */
+
+/*
+ * Copyright (C) 2000-2001 VERITAS Software Corporation.
+ */
+/*
+ *  Contributor:     Lake Stevens Instrument Division$
+ *  Written by:      Glenn Engel $
+ *  Updated by:	     Amit Kale<[email protected]>
+ *  Updated by:	     Tom Rini <[email protected]>
+ *  Modified for 386 by Jim Kingdon, Cygnus Support.
+ *  Origianl kgdb, compatibility with 2.1.xx kernel by
+ *  David Grothe <[email protected]>
+ *  Additional support from Tigran Aivazian <[email protected]>
+ */
+
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/smp.h>
+#include <linux/spinlock.h>
+#include <linux/delay.h>
+#include <asm/vm86.h>
+#include <asm/system.h>
+#include <asm/ptrace.h>		/* for linux pt_regs struct */
+#include <linux/kgdb.h>
+#include <linux/init.h>
+#include <asm/apicdef.h>
+#include <asm/desc.h>
+#include <asm/kdebug.h>
+
+#include "mach_ipi.h"
+
+/* Put the error code here just in case the user cares.  */
+int gdb_i386errcode;
+/* Likewise, the vector number here (since GDB only gets the signal
+   number through the usual means, and that's not very specific).  */
+int gdb_i386vector = -1;
+
+extern atomic_t cpu_doing_single_step;
+
+void regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *regs)
+{
+	gdb_regs[_EAX] = regs->eax;
+	gdb_regs[_EBX] = regs->ebx;
+	gdb_regs[_ECX] = regs->ecx;
+	gdb_regs[_EDX] = regs->edx;
+	gdb_regs[_ESI] = regs->esi;
+	gdb_regs[_EDI] = regs->edi;
+	gdb_regs[_EBP] = regs->ebp;
+	gdb_regs[_DS] = regs->xds;
+	gdb_regs[_ES] = regs->xes;
+	gdb_regs[_PS] = regs->eflags;
+	gdb_regs[_CS] = regs->xcs;
+	gdb_regs[_PC] = regs->eip;
+	gdb_regs[_ESP] = (int)(&regs->esp);
+	gdb_regs[_SS] = __KERNEL_DS;
+	gdb_regs[_FS] = 0xFFFF;
+	gdb_regs[_GS] = 0xFFFF;
+}
+
+/*
+ * Extracts ebp, esp and eip values understandable by gdb from the values
+ * saved by switch_to.
+ * thread.esp points to ebp. flags and ebp are pushed in switch_to hence esp
+ * prior to entering switch_to is 8 greater then the value that is saved.
+ * If switch_to changes, change following code appropriately.
+ */
+void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p)
+{
+	gdb_regs[_EAX] = 0;
+	gdb_regs[_EBX] = 0;
+	gdb_regs[_ECX] = 0;
+	gdb_regs[_EDX] = 0;
+	gdb_regs[_ESI] = 0;
+	gdb_regs[_EDI] = 0;
+	gdb_regs[_EBP] = *(unsigned long *)p->thread.esp;
+	gdb_regs[_DS] = __KERNEL_DS;
+	gdb_regs[_ES] = __KERNEL_DS;
+	gdb_regs[_PS] = *(unsigned long *)(p->thread.esp + 4);
+	gdb_regs[_CS] = __KERNEL_CS;
+	gdb_regs[_PC] = p->thread.eip;
+	gdb_regs[_ESP] = p->thread.esp;
+	gdb_regs[_SS] = __KERNEL_DS;
+	gdb_regs[_FS] = 0xFFFF;
+	gdb_regs[_GS] = 0xFFFF;
+}
+
+void gdb_regs_to_regs(unsigned long *gdb_regs, struct pt_regs *regs)
+{
+	regs->eax = gdb_regs[_EAX];
+	regs->ebx = gdb_regs[_EBX];
+	regs->ecx = gdb_regs[_ECX];
+	regs->edx = gdb_regs[_EDX];
+	regs->esi = gdb_regs[_ESI];
+	regs->edi = gdb_regs[_EDI];
+	regs->ebp = gdb_regs[_EBP];
+	regs->xds = gdb_regs[_DS];
+	regs->xes = gdb_regs[_ES];
+	regs->eflags = gdb_regs[_PS];
+	regs->xcs = gdb_regs[_CS];
+	regs->eip = gdb_regs[_PC];
+}
+
+static struct hw_breakpoint {
+	unsigned enabled;
+	unsigned type;
+	unsigned len;
+	unsigned addr;
+} breakinfo[4] = {
+	{ .enabled = 0 },
+	{ .enabled = 0 },
+	{ .enabled = 0 },
+	{ .enabled = 0 },
+};
+
+void kgdb_correct_hw_break(void)
+{
+	int breakno;
+	int correctit;
+	int breakbit;
+	unsigned dr7;
+
+	asm volatile ("movl %%db7, %0\n":"=r" (dr7)
+		      :);
+	do {
+		unsigned addr0, addr1, addr2, addr3;
+		asm volatile ("movl %%db0, %0\n"
+			      "movl %%db1, %1\n"
+			      "movl %%db2, %2\n"
+			      "movl %%db3, %3\n":"=r" (addr0), "=r"(addr1),
+			      "=r"(addr2), "=r"(addr3):);
+	} while (0);
+	correctit = 0;
+	for (breakno = 0; breakno < 3; breakno++) {
+		breakbit = 2 << (breakno << 1);
+		if (!(dr7 & breakbit) && breakinfo[breakno].enabled) {
+			correctit = 1;
+			dr7 |= breakbit;
+			dr7 &= ~(0xf0000 << (breakno << 2));
+			dr7 |= (((breakinfo[breakno].len << 2) |
+				 breakinfo[breakno].type) << 16) <<
+			    (breakno << 2);
+			switch (breakno) {
+			case 0:
+				asm volatile ("movl %0, %%dr0\n"::"r"
+					      (breakinfo[breakno].addr));
+				break;
+
+			case 1:
+				asm volatile ("movl %0, %%dr1\n"::"r"
+					      (breakinfo[breakno].addr));
+				break;
+
+			case 2:
+				asm volatile ("movl %0, %%dr2\n"::"r"
+					      (breakinfo[breakno].addr));
+				break;
+
+			case 3:
+				asm volatile ("movl %0, %%dr3\n"::"r"
+					      (breakinfo[breakno].addr));
+				break;
+			}
+		} else if ((dr7 & breakbit) && !breakinfo[breakno].enabled) {
+			correctit = 1;
+			dr7 &= ~breakbit;
+			dr7 &= ~(0xf0000 << (breakno << 2));
+		}
+	}
+	if (correctit)
+		asm volatile ("movl %0, %%db7\n"::"r" (dr7));
+}
+
+void kgdb_disable_hw_debug(struct pt_regs *regs)
+{
+	/* Disable hardware debugging while we are in kgdb */
+	asm volatile ("movl %0,%%db7": /* no output */ :"r" (0));
+}
+
+void kgdb_post_master_code(struct pt_regs *regs, int e_vector, int err_code)
+{
+	/* Master processor is completely in the debugger */
+	gdb_i386vector = e_vector;
+	gdb_i386errcode = err_code;
+}
+
+void kgdb_roundup_cpus(unsigned long flags)
+{
+	send_IPI_allbutself(APIC_DM_NMI);
+}
+
+int kgdb_arch_handle_exception(int e_vector, int signo,
+			       int err_code, char *remcom_in_buffer,
+			       char *remcom_out_buffer,
+			       struct pt_regs *linux_regs)
+{
+	long addr;
+	char *ptr;
+	int newPC, dr6;
+
+	switch (remcom_in_buffer[0]) {
+	case 'c':
+	case 's':
+		/* try to read optional parameter, pc unchanged if no parm */
+		ptr = &remcom_in_buffer[1];
+		if (kgdb_hex2long(&ptr, &addr))
+			linux_regs->eip = addr;
+		newPC = linux_regs->eip;
+
+		/* clear the trace bit */
+		linux_regs->eflags &= ~TF_MASK;
+		atomic_set(&cpu_doing_single_step, -1);
+
+		/* set the trace bit if we're stepping */
+		if (remcom_in_buffer[0] == 's') {
+			linux_regs->eflags |= TF_MASK;
+			debugger_step = 1;
+			if (kgdb_contthread)
+				atomic_set(&cpu_doing_single_step,
+					   smp_processor_id());
+		}
+
+		asm volatile ("movl %%db6, %0\n":"=r" (dr6));
+		if (!(dr6 & 0x4000)) {
+			long breakno;
+			for (breakno = 0; breakno < 4; ++breakno) {
+				if (dr6 & (1 << breakno) &&
+				    breakinfo[breakno].type == 0) {
+					/* Set restore flag */
+					linux_regs->eflags |= X86_EFLAGS_RF;
+					break;
+				}
+			}
+		}
+		kgdb_correct_hw_break();
+		asm volatile ("movl %0, %%db6\n"::"r" (0));
+
+		return (0);
+	}			/* switch */
+	/* this means that we do not want to exit from the handler */
+	return -1;
+}
+
+/* Register KGDB with the i386die_chain so that we hook into all of the right
+ * spots. */
+static int kgdb_notify(struct notifier_block *self, unsigned long cmd,
+		       void *ptr)
+{
+	struct die_args *args = ptr;
+	struct pt_regs *regs = args->regs;
+
+	/* Bad memory access? */
+	if (cmd == DIE_PAGE_FAULT_NO_CONTEXT && atomic_read(&debugger_active)
+			&& kgdb_may_fault) {
+		kgdb_fault_longjmp(kgdb_fault_jmp_regs);
+		return NOTIFY_STOP;
+	} else if (cmd == DIE_PAGE_FAULT)
+		/* A normal page fault, ignore. */
+		return NOTIFY_DONE;
+	else if (cmd == DIE_NMI && atomic_read(&debugger_active)) {
+		/* CPU roundup */
+		kgdb_nmihook(smp_processor_id(), regs);
+		return NOTIFY_STOP;
+	} else if (cmd == DIE_NMI_IPI || user_mode(regs) ||
+		   (cmd == DIE_DEBUG && atomic_read(&debugger_active)))
+		/* Normal watchdog event or userspace debugging, or spurious
+		 * debug exception, ignore. */
+		return NOTIFY_DONE;
+
+	kgdb_handle_exception(args->trapnr, args->signr, args->err, regs);
+
+	return NOTIFY_STOP;
+}
+
+static struct notifier_block kgdb_notifier = {
+	.notifier_call = kgdb_notify,
+};
+
+int kgdb_arch_init(void)
+{
+	notifier_chain_register(&i386die_chain, &kgdb_notifier);
+	return 0;
+}
+
+struct kgdb_arch arch_kgdb_ops = {
+	.gdb_bpt_instr = {0xcc},
+};

Index: linux-2.6.14/arch/i386/kernel/setup.c
===================================================================
@@ -148,6 +148,7 @@ EXPORT_SYMBOL(ist_info);
 struct e820map e820;
 
 extern void early_cpu_init(void);
+extern void early_trap_init(void);
 extern void dmi_scan_machine(void);
 extern void generic_apic_probe(char *);
 extern int root_mountflags;

@@ -1481,6 +1482,7 @@ void __init setup_arch(char **cmdline_p)
 	memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
 	pre_setup_arch_hook();
 	early_cpu_init();
+	early_trap_init();
 
 	/*
 	 * FIXME: This isn't an official loader_type right

@@ -1537,6 +1539,7 @@ void __init setup_arch(char **cmdline_p)
 	data_resource.end = virt_to_phys(_edata)-1;
 
 	parse_cmdline_early(cmdline_p);
+	parse_early_param();
 
 	max_low_pfn = setup_memory();
 

Index: linux-2.6.14/arch/i386/kernel/traps.c
===================================================================
@@ -333,7 +333,7 @@ void die(const char * str, struct pt_reg
 #endif
 		if (nl)
 			printk("\n");
-	notify_die(DIE_OOPS, (char *)str, regs, err, 255, SIGSEGV);
+		notify_die(DIE_OOPS, (char *)str, regs, err, 255, SIGSEGV);
 		show_registers(regs);
   	} else
 		printk(KERN_ERR "Recursive die() failure, output suppressed\n");

@@ -759,6 +759,7 @@ fastcall void __kprobes do_debug(struct 
 	 */
 clear_dr7:
 	set_debugreg(0, 7);
+	notify_die(DIE_DEBUG, "debug2", regs, condition, error_code, SIGTRAP);
 	return;
 
 debug_vm86:

@@ -1063,6 +1064,12 @@ static void __init set_task_gate(unsigne
 	_set_gate(idt_table+n,5,0,0,(gdt_entry<<3));
 }
 
+/* Some traps need to be set early. */
+void __init early_trap_init(void) {
+	set_intr_gate(1,&debug);
+	set_system_intr_gate(3, &int3); /* int3 can be called from all */
+	set_intr_gate(14,&page_fault);
+}
 
 void __init trap_init(void)
 {

@@ -1079,10 +1086,8 @@ void __init trap_init(void)
 #endif
 
 	set_trap_gate(0,&divide_error);
-	set_intr_gate(1,&debug);
 	set_intr_gate(2,&nmi);
-	set_system_intr_gate(3, &int3); /* int3-5 can be called from all */
-	set_system_gate(4,&overflow);
+	set_system_gate(4,&overflow); /* int4/5 can be called from all */
 	set_system_gate(5,&bounds);
 	set_trap_gate(6,&invalid_op);
 	set_trap_gate(7,&device_not_available);

@@ -1092,7 +1097,6 @@ void __init trap_init(void)
 	set_trap_gate(11,&segment_not_present);
 	set_trap_gate(12,&stack_segment);
 	set_trap_gate(13,&general_protection);
-	set_intr_gate(14,&page_fault);
 	set_trap_gate(15,&spurious_interrupt_bug);
 	set_trap_gate(16,&coprocessor_error);
 	set_trap_gate(17,&alignment_check);

Index: linux-2.6.14/arch/i386/mm/fault.c
===================================================================
@@ -433,6 +433,10 @@ no_context:
  	if (is_prefetch(regs, address, error_code))
  		return;
 
+	if (notify_die(DIE_PAGE_FAULT_NO_CONTEXT, "no context", regs,
+				error_code, 14, SIGSEGV) == NOTIFY_STOP)
+		return;
+
 /*
  * Oops. The kernel tried to access some bad page. We'll have to
  * terminate things with extreme prejudice.

49 lines not on this page · raw message

Index: linux-2.6.14/include/asm-i386/system.h
===================================================================
@@ -12,9 +12,13 @@
 struct task_struct;	/* one of the stranger aspects of C forward declarations.. */
 extern struct task_struct * FASTCALL(__switch_to(struct task_struct *prev, struct task_struct *next));
 
+/* sleeping_thread_to_gdb_regs depends on this code. Correct it if you change
+ * any of the following */
 #define switch_to(prev,next,last) do {					\
 	unsigned long esi,edi;						\
-	asm volatile("pushl %%ebp\n\t"					\
+	asm volatile(".globl __switch_to_begin\n"			\
+		     "__switch_to_begin:"				\
+		     "pushl %%ebp\n\t"					\
 		     "movl %%esp,%0\n\t"	/* save ESP */		\
 		     "movl %5,%%esp\n\t"	/* restore ESP */	\
 		     "movl $1f,%1\n\t"		/* save EIP */		\

@@ -22,6 +26,8 @@ extern struct task_struct * FASTCALL(__s
 		     "jmp __switch_to\n"				\
 		     "1:\t"						\
 		     "popl %%ebp\n\t"					\
+		     ".globl __switch_to_end\n"				\
+		     "__switch_to_end:\n"				\
 		     :"=m" (prev->thread.esp),"=m" (prev->thread.eip),	\
 		      "=a" (last),"=S" (esi),"=D" (edi)			\
 		     :"m" (next->thread.esp),"m" (next->thread.eip),	\

Index: linux-2.6.14/include/asm-i386/kdebug.h
===================================================================
@@ -39,6 +39,7 @@ enum die_val {
 	DIE_CALL,
 	DIE_NMI_IPI,
 	DIE_PAGE_FAULT,
+	DIE_PAGE_FAULT_NO_CONTEXT,
 };
 
 static inline int notify_die(enum die_val val, const char *str,

329 lines not on this page · raw message

867 lines not on this page · raw message

Index: linux-2.6.14/arch/ppc/kernel/setup.c
===================================================================
@@ -49,10 +49,6 @@
 #include <asm/ppc_sys.h>
 #endif
 
-#if defined CONFIG_KGDB
-#include <asm/kgdb.h>
-#endif
-
 extern void platform_init(unsigned long r3, unsigned long r4,
 		unsigned long r5, unsigned long r6, unsigned long r7);
 extern void bootx_init(unsigned long r4, unsigned long phys);

@@ -727,18 +723,6 @@ void __init setup_arch(char **cmdline_p)
 #endif /* CONFIG_XMON */
 	if ( ppc_md.progress ) ppc_md.progress("setup_arch: enter", 0x3eab);
 
-#if defined(CONFIG_KGDB)
-	if (ppc_md.kgdb_map_scc)
-		ppc_md.kgdb_map_scc();
-	set_debug_traps();
-	if (strstr(cmd_line, "gdb")) {
-		if (ppc_md.progress)
-			ppc_md.progress("setup_arch: kgdb breakpoint", 0x4000);
-		printk("kgdb breakpoint activated\n");
-		breakpoint();
-	}
-#endif
-
 	/*
 	 * Set cache line size based on type of cpu as a default.
 	 * Systems with OF can look in the properties on the cpu node(s)

Index: linux-2.6.14/arch/ppc/mm/fault.c
===================================================================
@@ -28,6 +28,7 @@
 #include <linux/interrupt.h>
 #include <linux/highmem.h>
 #include <linux/module.h>
+#include <linux/kgdb.h>
 
 #include <asm/page.h>
 #include <asm/pgtable.h>

@@ -328,6 +329,14 @@ bad_page_fault(struct pt_regs *regs, uns
 		return;
 	}
 
+#ifdef CONFIG_KGDB
+	if (atomic_read(&debugger_active) && kgdb_may_fault) {
+		/* Restore our previous state. */
+		kgdb_fault_longjmp(kgdb_fault_jmp_regs);
+		/* Not reached. */
+	}
+#endif
+
 	/* kernel has accessed a bad area */
 #if defined(CONFIG_XMON) || defined(CONFIG_KGDB)
 	if (debugger_kernel_faults)

Index: linux-2.6.14/arch/ppc/platforms/4xx/bubinga.c
===================================================================
@@ -4,7 +4,7 @@
  * Author: SAW (IBM), derived from walnut.c.
  *         Maintained by MontaVista Software <[email protected]>
  *
- * 2003 (c) MontaVista Softare Inc.  This file is licensed under the
+ * 2003-2004 (c) MontaVista Softare Inc.  This file is licensed under the
  * terms of the GNU General Public License version 2. This program is
  * licensed "as is" without any warranty of any kind, whether express
  * or implied.

@@ -101,17 +101,26 @@ bubinga_early_serial_map(void)
 	port.flags = ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST;
 	port.line = 0;
 
-	if (early_serial_setup(&port) != 0) {
+#ifdef CONFIG_SERIAL_8250
+	if (early_serial_setup(&port) != 0)
 		printk("Early serial init of port 0 failed\n");
-	}
+#endif
+
+#ifdef CONFIG_KGDB_8250
+	kgdb8250_add_port(0, &port);
+#endif
 
 	port.membase = (void*)ACTING_UART1_IO_BASE;
 	port.irq = ACTING_UART1_INT;
 	port.line = 1;
 
-	if (early_serial_setup(&port) != 0) {
+#ifdef CONFIG_SERIAL_8250
+	if (early_serial_setup(&port) != 0)
 		printk("Early serial init of port 1 failed\n");
-	}
+#endif
+#ifdef CONFIG_KGDB_8250
+	kgdb8250_add_port(1, &port);
+#endif
 }
 
 void __init

@@ -256,8 +265,4 @@ platform_init(unsigned long r3, unsigned
 	ppc_md.nvram_read_val = todc_direct_read_val;
 	ppc_md.nvram_write_val = todc_direct_write_val;
 #endif
-#ifdef CONFIG_KGDB
-	ppc_md.early_serial_map = bubinga_early_serial_map;
-#endif
 }
-

Index: linux-2.6.14/arch/ppc/platforms/4xx/ebony.c
===================================================================
@@ -35,6 +35,7 @@
 #include <linux/tty.h>
 #include <linux/serial.h>
 #include <linux/serial_core.h>
+#include <linux/kgdb.h>
 
 #include <asm/system.h>
 #include <asm/pgtable.h>

@@ -229,14 +230,20 @@ ebony_early_serial_map(void)
 	port.flags = ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST;
 	port.line = 0;
 
-	if (early_serial_setup(&port) != 0) {
+#ifdef CONFIG_SERIAL_8250
+	if (early_serial_setup(&port) != 0)
 		printk("Early serial init of port 0 failed\n");
-	}
+#endif
 
-#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
+#ifdef CONFIG_SERIAL_TEXT_DEBUG
 	/* Configure debug serial access */
 	gen550_init(0, &port);
+#endif
+#ifdef CONFIG_KGDB_8250
+	kgdb8250_add_port(0, &port);
+#endif
 
+#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB_8250)
 	/* Purge TLB entry added in head_44x.S for early serial access */
 	_tlbie(UART0_IO_BASE);
 #endif

@@ -246,14 +253,18 @@ ebony_early_serial_map(void)
 	port.uartclk = clocks.uart1;
 	port.line = 1;
 
-	if (early_serial_setup(&port) != 0) {
+#ifdef CONFIG_SERIAL_8250
+	if (early_serial_setup(&port) != 1)
 		printk("Early serial init of port 1 failed\n");
-	}
+#endif
 
-#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
+#ifdef CONFIG_SERIAL_TEXT_DEBUG
 	/* Configure debug serial access */
 	gen550_init(1, &port);
 #endif
+#ifdef CONFIG_KGDB_8250
+	kgdb8250_add_port(1, &port);
+#endif
 }
 
 static void __init

@@ -339,8 +350,4 @@ void __init platform_init(unsigned long 
 
 	ppc_md.nvram_read_val = todc_direct_read_val;
 	ppc_md.nvram_write_val = todc_direct_write_val;
-#ifdef CONFIG_KGDB
-	ppc_md.early_serial_map = ebony_early_serial_map;
-#endif
 }
-

Index: linux-2.6.14/arch/ppc/platforms/4xx/ocotea.c
===================================================================
@@ -33,6 +33,7 @@
 #include <linux/tty.h>
 #include <linux/serial.h>
 #include <linux/serial_core.h>
+#include <linux/kgdb.h>
 
 #include <asm/system.h>
 #include <asm/pgtable.h>

@@ -252,14 +253,20 @@ ocotea_early_serial_map(void)
 	port.flags = ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST;
 	port.line = 0;
 
-	if (early_serial_setup(&port) != 0) {
+#ifdef CONFIG_SERIAL_8250
+	if (early_serial_setup(&port) != 0)
 		printk("Early serial init of port 0 failed\n");
-	}
+#endif
 
-#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
+#ifdef CONFIG_SERIAL_TEXT_DEBUG
 	/* Configure debug serial access */
 	gen550_init(0, &port);
+#endif
+#ifdef CONFIG_KGDB_8250
+	kgdb8250_add_port(0, &port);
+#endif
 
+#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB_8250)
 	/* Purge TLB entry added in head_44x.S for early serial access */
 	_tlbie(UART0_IO_BASE);
 #endif

@@ -269,14 +276,18 @@ ocotea_early_serial_map(void)
 	port.uartclk = clocks.uart1;
 	port.line = 1;
 
-	if (early_serial_setup(&port) != 0) {
+#ifdef CONFIG_SERIAL_8250
+	if (early_serial_setup(&port) != 1)
 		printk("Early serial init of port 1 failed\n");
-	}
+#endif
 
-#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
+#ifdef CONFIG_SERIAL_TEXT_DEBUG
 	/* Configure debug serial access */
 	gen550_init(1, &port);
 #endif
+#ifdef CONFIG_KGDB_8250
+	kgdb8250_add_port(1, &port);
+#endif
 }
 
 static void __init

@@ -355,8 +366,5 @@ void __init platform_init(unsigned long 
 
 	ppc_md.nvram_read_val = todc_direct_read_val;
 	ppc_md.nvram_write_val = todc_direct_write_val;
-#ifdef CONFIG_KGDB
-	ppc_md.early_serial_map = ocotea_early_serial_map;
-#endif
 	ppc_md.init = ocotea_init;
 }

Index: linux-2.6.14/arch/ppc/platforms/4xx/xilinx_ml300.c
===================================================================
@@ -42,9 +42,6 @@
  *      ppc4xx_map_io				arch/ppc/syslib/ppc4xx_setup.c
  *  start_kernel				init/main.c
  *    setup_arch				arch/ppc/kernel/setup.c
- * #if defined(CONFIG_KGDB)
- *      *ppc_md.kgdb_map_scc() == gen550_kgdb_map_scc
- * #endif
  *      *ppc_md.setup_arch == ml300_setup_arch	this file
  *        ppc4xx_setup_arch			arch/ppc/syslib/ppc4xx_setup.c
  *          ppc4xx_find_bridges			arch/ppc/syslib/ppc405_pci.c

@@ -83,7 +80,6 @@ ml300_map_io(void)
 static void __init
 ml300_early_serial_map(void)
 {
-#ifdef CONFIG_SERIAL_8250
 	struct serial_state old_ports[] = { SERIAL_PORT_DFNS };
 	struct uart_port port;
 	int i;

@@ -99,11 +95,14 @@ ml300_early_serial_map(void)
 		port.flags = ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST;
 		port.line = i;
 
-		if (early_serial_setup(&port) != 0) {
+#ifdef CONFIG_SERIAL_8250
+		if (early_serial_setup(&port) != 0)
 			printk("Early serial init of port %d failed\n", i);
-		}
+#endif
+#ifdef CONFIG_KGDB_8250
+		kgdb8250_add_port(i, &port)
+#endif
 	}
-#endif /* CONFIG_SERIAL_8250 */
 }
 
 void __init

@@ -138,9 +137,4 @@ platform_init(unsigned long r3, unsigned
 #if defined(XPAR_POWER_0_POWERDOWN_BASEADDR)
 	ppc_md.power_off = xilinx_power_off;
 #endif
-
-#ifdef CONFIG_KGDB
-	ppc_md.early_serial_map = ml300_early_serial_map;
-#endif
 }
-

Index: linux-2.6.14/arch/ppc/platforms/85xx/sbc8560.c
===================================================================
@@ -53,7 +53,6 @@
 #include <syslib/ppc85xx_common.h>
 #include <syslib/ppc85xx_setup.h>
 
-#ifdef CONFIG_SERIAL_8250
 static void __init
 sbc8560_early_serial_map(void)
 {

@@ -69,27 +68,34 @@ sbc8560_early_serial_map(void)
         uart_req.membase = ioremap(uart_req.mapbase, MPC85xx_UART0_SIZE);
 	uart_req.type = PORT_16650;
 
-#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
-        gen550_init(0, &uart_req);
+#ifdef CONFIG_SERIAL_8250
+	if (early_serial_setup(&uart_req) != 0)
+		printk("Early serial init of port 0 failed\n");
 #endif
- 
-        if (early_serial_setup(&uart_req) != 0)
-                printk("Early serial init of port 0 failed\n");
- 
+#ifdef CONFIG_SERIAL_TEXT_DEBUG
+	gen550_init(0, &uart_req);
+#endif
+#ifdef CONFIG_KGDB_8250
+	kgdb8250_add_port(0, &uart_req);
+#endif
+
         /* Assume early_serial_setup() doesn't modify uart_req */
 	uart_req.line = 1;
         uart_req.mapbase = UARTB_ADDR;
         uart_req.membase = ioremap(uart_req.mapbase, MPC85xx_UART1_SIZE);
 	uart_req.irq = MPC85xx_IRQ_EXT10;
- 
-#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
-        gen550_init(1, &uart_req);
+
+#ifdef CONFIG_SERIAL_8250
+	if (early_serial_setup(&uart_req) != 0)
+		printk("Early serial init of port 1 failed\n");
 #endif
- 
-        if (early_serial_setup(&uart_req) != 0)
-                printk("Early serial init of port 1 failed\n");
-}
+#ifdef CONFIG_SERIAL_TEXT_DEBUG
+	gen550_init(1, &uart_req);
 #endif
+#ifdef CONFIG_KGDB_8250
+	kgdb8250_add_port(1, &uart_req);
+#endif
+}
 
 /* ************************************************************************
  *

@@ -117,9 +123,7 @@ sbc8560_setup_arch(void)
 	/* setup PCI host bridges */
 	mpc85xx_setup_hose();
 #endif
-#ifdef CONFIG_SERIAL_8250
 	sbc8560_early_serial_map();
-#endif
 #ifdef CONFIG_SERIAL_TEXT_DEBUG
 	/* Invalidate the entry we stole earlier the serial ports
 	 * should be properly mapped */ 

Index: linux-2.6.14/arch/ppc/platforms/chestnut.c
===================================================================
@@ -495,7 +495,7 @@ chestnut_power_off(void)
 static void __init
 chestnut_map_io(void)
 {
-#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
+#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB_8250)
 	io_block_mapping(CHESTNUT_UART_BASE, CHESTNUT_UART_BASE, 0x100000,
 		_PAGE_IO);
 #endif

@@ -570,9 +570,6 @@ platform_init(unsigned long r3, unsigned
 #if defined(CONFIG_SERIAL_TEXT_DEBUG)
 	ppc_md.progress = gen550_progress;
 #endif
-#if defined(CONFIG_KGDB)
-	ppc_md.kgdb_map_scc = gen550_kgdb_map_scc;
-#endif
 
 	if (ppc_md.progress)
                 ppc_md.progress("chestnut_init(): exit", 0);

Index: linux-2.6.14/arch/ppc/platforms/pplus.c
===================================================================
@@ -907,9 +907,6 @@ platform_init(unsigned long r3, unsigned
 #ifdef CONFIG_SERIAL_TEXT_DEBUG
 	ppc_md.progress = gen550_progress;
 #endif				/* CONFIG_SERIAL_TEXT_DEBUG */
-#ifdef CONFIG_KGDB
-	ppc_md.kgdb_map_scc = gen550_kgdb_map_scc;
-#endif
 #ifdef CONFIG_SMP
 	ppc_md.smp_ops = &pplus_smp_ops;
 #endif				/* CONFIG_SMP */

Index: linux-2.6.14/arch/ppc/platforms/sandpoint.c
===================================================================
@@ -750,9 +750,6 @@ platform_init(unsigned long r3, unsigned
 	ppc_md.nvram_read_val = todc_mc146818_read_val;
 	ppc_md.nvram_write_val = todc_mc146818_write_val;
 
-#ifdef CONFIG_KGDB
-	ppc_md.kgdb_map_scc = gen550_kgdb_map_scc;
-#endif
 #ifdef CONFIG_SERIAL_TEXT_DEBUG
 	ppc_md.progress = gen550_progress;
 #endif

Index: linux-2.6.14/arch/ppc/platforms/spruce.c
===================================================================
@@ -181,26 +181,32 @@ spruce_early_serial_map(void)
 	serial_req.membase = (u_char *)UART0_IO_BASE;
 	serial_req.regshift = 0;
 
-#if defined(CONFIG_KGDB) || defined(CONFIG_SERIAL_TEXT_DEBUG)
-	gen550_init(0, &serial_req);
-#endif
 #ifdef CONFIG_SERIAL_8250
 	if (early_serial_setup(&serial_req) != 0)
 		printk("Early serial init of port 0 failed\n");
 #endif
+#ifdef CONFIG_SERIAL_TEXT_DEBUG
+	gen550_init(0, &serial_req);
+#endif
+#ifdef CONFIG_KGDB_8250
+	kgdb8250_add_port(0, &port);
+#endif
 
 	/* Assume early_serial_setup() doesn't modify serial_req */
 	serial_req.line = 1;
 	serial_req.irq = UART1_INT;
 	serial_req.membase = (u_char *)UART1_IO_BASE;
 
-#if defined(CONFIG_KGDB) || defined(CONFIG_SERIAL_TEXT_DEBUG)
-	gen550_init(1, &serial_req);
-#endif
 #ifdef CONFIG_SERIAL_8250
 	if (early_serial_setup(&serial_req) != 0)
 		printk("Early serial init of port 1 failed\n");
 #endif
+#ifdef CONFIG_SERIAL_TEXT_DEBUG
+	gen550_init(1, &serial_req);
+#endif
+#ifdef CONFIG_KGDB_8250
+	kgdb8250_add_port(1, &serial_req);
+#endif
 }
 
 TODC_ALLOC();

@@ -319,7 +325,4 @@ platform_init(unsigned long r3, unsigned
 #ifdef CONFIG_SERIAL_TEXT_DEBUG
 	ppc_md.progress = gen550_progress;
 #endif /* CONFIG_SERIAL_TEXT_DEBUG */
-#ifdef CONFIG_KGDB
-	ppc_md.kgdb_map_scc = gen550_kgdb_map_scc;
-#endif
 }

Index: linux-2.6.14/arch/ppc/syslib/gen550.h
===================================================================
@@ -13,4 +13,3 @@
 
 extern void gen550_progress(char *, unsigned short);
 extern void gen550_init(int, struct uart_port *);
-extern void gen550_kgdb_map_scc(void);

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Index: linux-2.6.14/arch/ppc/syslib/ibm44x_common.c
===================================================================
@@ -161,9 +161,6 @@ void __init ibm44x_platform_init(void)
 #ifdef CONFIG_SERIAL_TEXT_DEBUG
 	ppc_md.progress = gen550_progress;
 #endif /* CONFIG_SERIAL_TEXT_DEBUG */
-#ifdef CONFIG_KGDB
-	ppc_md.kgdb_map_scc = gen550_kgdb_map_scc;
-#endif
 
 	/*
 	 * The Abatron BDI JTAG debugger does not tolerate others

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Index: linux-2.6.14/arch/ppc/syslib/ppc85xx_setup.c
===================================================================
@@ -71,7 +71,6 @@ mpc85xx_calibrate_decr(void)
 	mtspr(SPRN_TCR, TCR_DIE);
 }
 
-#ifdef CONFIG_SERIAL_8250
 void __init
 mpc85xx_early_serial_map(void)
 {

@@ -87,7 +86,7 @@ mpc85xx_early_serial_map(void)
 	pdata[0].mapbase += binfo->bi_immr_base;
 	pdata[0].membase = ioremap(pdata[0].mapbase, MPC85xx_UART0_SIZE);
 
-#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
+#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB_8250)
 	memset(&serial_req, 0, sizeof (serial_req));
 	serial_req.iotype = SERIAL_IO_MEM;
 	serial_req.mapbase = pdata[0].mapbase;

@@ -95,18 +94,24 @@ mpc85xx_early_serial_map(void)
 	serial_req.regshift = 0;
 
 	gen550_init(0, &serial_req);
+#ifdef CONFIG_KGDB_8250
+	kgdb8250_add_port(0, &serial_req);
+#endif
 #endif
 
 	pdata[1].uartclk = binfo->bi_busfreq;
 	pdata[1].mapbase += binfo->bi_immr_base;
 	pdata[1].membase = ioremap(pdata[1].mapbase, MPC85xx_UART0_SIZE);
 
-#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
+#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB_8250)
 	/* Assume gen550_init() doesn't modify serial_req */
 	serial_req.mapbase = pdata[1].mapbase;
 	serial_req.membase = pdata[1].membase;
 
 	gen550_init(1, &serial_req);
+#ifdef CONFIG_KGDB_8250
+	kgdb8250_add_port(1, &serial_req);
+#endif
 #endif
 }
 #endif

@@ -365,5 +370,3 @@ mpc85xx_setup_hose(void)
 	return;
 }
 #endif /* CONFIG_PCI */
-
-

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Index: linux-2.6.14/drivers/serial/mpsc.h
===================================================================
@@ -207,6 +207,10 @@ struct mpsc_port_info *mpsc_device_remov
 #define	MPSC_RCRR			0x0004
 #define	MPSC_TCRR			0x0008
 
+/* MPSC Interrupt registers (offset from MV64x60_SDMA_INTR_OFFSET) */
+#define MPSC_INTR_CAUSE			0x0004
+#define MPSC_INTR_MASK			0x0084
+#define MPSC_INTR_CAUSE_RCC		(1<<6)
 /*
  *****************************************************************************
  *

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Index: linux-2.6.14/include/asm-ppc/machdep.h
===================================================================
@@ -59,9 +59,7 @@ struct machdep_calls {
 	unsigned long	(*find_end_of_memory)(void);
 	void		(*setup_io_mappings)(void);
 
-	void		(*early_serial_map)(void);
   	void		(*progress)(char *, unsigned short);
-	void		(*kgdb_map_scc)(void);
 
 	unsigned char 	(*nvram_read_val)(int addr);
 	void		(*nvram_write_val)(int addr, unsigned char val);

Index: linux-2.6.14/include/asm-ppc/mv64x60_defs.h
===================================================================
@@ -57,7 +57,8 @@
 #define	MV64x60_IRQ_I2C				37
 #define	MV64x60_IRQ_BRG				39
 #define	MV64x60_IRQ_MPSC_0			40
-#define	MV64x60_IRQ_MPSC_1			42
+#define	MV64360_IRQ_MPSC_1			41
+#define	GT64260_IRQ_MPSC_1			42
 #define	MV64x60_IRQ_COMM			43
 #define	MV64x60_IRQ_P0_GPP_0_7			56
 #define	MV64x60_IRQ_P0_GPP_8_15			57

Index: linux-2.6.14/include/asm-ppc/mv64x60.h
===================================================================
@@ -347,6 +347,8 @@ u32 mv64x60_calc_mem_size(struct mv64x60
 
 void mv64x60_progress_init(u32 base);
 void mv64x60_mpsc_progress(char *s, unsigned short hex);
+struct platform_device * mv64x60_early_get_pdev_data(const char *name,
+		int id, int remove);
 
 extern struct mv64x60_32bit_window
 	gt64260_32bit_windows[MV64x60_32BIT_WIN_COUNT];

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Index: linux-2.6.14/drivers/serial/cpm_uart/cpm_uart_cpm2.c
===================================================================
@@ -261,6 +261,10 @@ int cpm_uart_init_portdesc(void)
 {
 	pr_debug("CPM uart[-]:init portdesc\n");
 
+	/* Check if we have called this yet. This may happen if early kgdb
+	breakpoint is on */
+	if(cpm_uart_nr)
+		return 0;
 	cpm_uart_nr = 0;
 #ifdef CONFIG_SERIAL_CPM_SMC1
 	cpm_uart_ports[UART_SMC1].smcp = (smc_t *) & cpm2_immr->im_smc[0];

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Index: linux-2.6.14/drivers/serial/8250.c
===================================================================
@@ -2520,6 +2520,27 @@ void serial8250_unregister_port(int line
 }
 EXPORT_SYMBOL(serial8250_unregister_port);
 
+/**
+ *	serial8250_unregister_by_port - remove a 16x50 serial port
+ *	at runtime.
+ *	@port: A &struct uart_port that describes the port to remove.
+ *
+ *	Remove one serial port.  This may not be called from interrupt
+ *	context.  We hand the port back to the our control.
+ */
+void serial8250_unregister_by_port(struct uart_port *port)
+{
+	struct uart_8250_port *uart;
+
+	down(&serial_sem);
+	uart = serial8250_find_match_or_unused(port);
+	up(&serial_sem);
+
+	if (uart)
+		serial8250_unregister_port(uart->port.line);
+}
+EXPORT_SYMBOL(serial8250_unregister_by_port);
+
 static int __init serial8250_init(void)
 {
 	int ret, i;

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Index: linux-2.6.14/include/linux/serial_8250.h
===================================================================
@@ -54,6 +54,7 @@ struct uart_port;
 
 int serial8250_register_port(struct uart_port *);
 void serial8250_unregister_port(int line);
+void serial8250_unregister_by_port(struct uart_port *port);
 void serial8250_suspend_port(int line);
 void serial8250_resume_port(int line);
 

Index: linux-2.6.14/drivers/serial/serial_core.c
===================================================================
@@ -33,6 +33,7 @@
 #include <linux/device.h>
 #include <linux/serial.h> /* for serial_state and serial_icounter_struct */
 #include <linux/delay.h>
+#include <linux/kgdb.h>
 
 #include <asm/irq.h>
 #include <asm/uaccess.h>

@@ -2237,6 +2238,12 @@ int uart_add_one_port(struct uart_driver
 	    port->cons && !(port->cons->flags & CON_ENABLED))
 		register_console(port->cons);
 
+#if defined(CONFIG_KGDB_8250)
+	/* Add any 8250-like ports we find later. */
+	if (port->type <= PORT_MAX_8250)
+		kgdb8250_add_port(port->line, port);
+#endif
+
  out:
 	up(&port_sem);
 

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Index: linux-2.6.14/arch/mips/kernel/irq.c
===================================================================
@@ -26,6 +26,10 @@
 #include <asm/atomic.h>
 #include <asm/system.h>
 #include <asm/uaccess.h>
+#include <asm/kgdb.h>
+
+/* Keep track of if we've done certain initialization already or not. */
+int kgdb_early_setup;
 
 /*
  * 'what should we do if we get a hw irq event on an illegal vector'.

@@ -103,23 +107,13 @@ skip:
 	return 0;
 }
 
-#ifdef CONFIG_KGDB
-extern void breakpoint(void);
-extern void set_debug_traps(void);
-
-static int kgdb_flag = 1;
-static int __init nokgdb(char *str)
-{
-	kgdb_flag = 0;
-	return 1;
-}
-__setup("nokgdb", nokgdb);
-#endif
-
 void __init init_IRQ(void)
 {
 	int i;
 
+	if (kgdb_early_setup)
+		return;
+
 	for (i = 0; i < NR_IRQS; i++) {
 		irq_desc[i].status  = IRQ_DISABLED;
 		irq_desc[i].action  = NULL;

@@ -129,12 +123,12 @@ void __init init_IRQ(void)
 	}
 
 	arch_init_irq();
-
 #ifdef CONFIG_KGDB
-	if (kgdb_flag) {
-		printk("Wait for gdb client connection ...\n");
-		set_debug_traps();
-		breakpoint();
-	}
+	/*
+	 * We have been called before kgdb_arch_init(). Hence,
+	 * we dont want the traps to be reinitialized
+	 */
+	if (kgdb_early_setup == 0)
+		kgdb_early_setup = 1;
 #endif
 }

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Index: linux-2.6.14/arch/mips/kernel/traps.c
===================================================================
@@ -10,6 +10,8 @@
  * Kevin D. Kissell, [email protected] and Carsten Langgaard, [email protected]
  * Copyright (C) 2000, 01 MIPS Technologies, Inc.
  * Copyright (C) 2002, 2003, 2004  Maciej W. Rozycki
+ *
+ * KGDB specific changes - Manish Lachwani ([email protected])
  */
 #include <linux/config.h>
 #include <linux/init.h>

@@ -20,6 +22,7 @@
 #include <linux/smp_lock.h>
 #include <linux/spinlock.h>
 #include <linux/kallsyms.h>
+#include <linux/kgdb.h>
 
 #include <asm/bootinfo.h>
 #include <asm/branch.h>

@@ -37,6 +40,7 @@
 #include <asm/mmu_context.h>
 #include <asm/watch.h>
 #include <asm/types.h>
+#include <asm/kdebug.h>
 
 extern asmlinkage void handle_tlbm(void);
 extern asmlinkage void handle_tlbl(void);

@@ -69,6 +73,21 @@ int (*board_be_handler)(struct pt_regs *
  */
 #define MODULE_RANGE (8*1024*1024)
 
+struct notifier_block *mips_die_chain;
+static spinlock_t die_notifier_lock = SPIN_LOCK_UNLOCKED;
+
+int register_die_notifier(struct notifier_block *nb)
+{
+	int err = 0;
+	unsigned long flags;
+
+	spin_lock_irqsave(&die_notifier_lock, flags);
+	err = notifier_chain_register(&mips_die_chain, nb);
+	spin_unlock_irqrestore(&die_notifier_lock, flags);
+
+	return err;
+}
+
 /*
  * This routine abuses get_user()/put_user() to reference pointers
  * with at least a bit of error checking ...

@@ -271,8 +290,10 @@ NORET_TYPE void __die(const char * str, 
 void __die_if_kernel(const char * str, struct pt_regs * regs,
 		     const char * file, const char * func, unsigned long line)
 {
-	if (!user_mode(regs))
+	if (!user_mode(regs)) {
+		notify_die(DIE_TRAP, (char *)str, regs, 0);
 		__die(str, regs, file, func, line);
+	}
 }
 
 extern const struct exception_table_entry __start___dbe_table[];

@@ -958,6 +979,9 @@ void __init trap_init(void)
 	extern char except_vec4;
 	unsigned long i;
 
+	if (kgdb_early_setup)
+		return;	/* Already done */
+
 	per_cpu_trap_init();
 
 	/*

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Index: linux-2.6.14/arch/mips/mips-boards/malta/malta_setup.c
===================================================================
@@ -48,10 +48,6 @@ extern void mips_time_init(void);
 extern void mips_timer_setup(struct irqaction *irq);
 extern unsigned long mips_rtc_get_time(void);
 
-#ifdef CONFIG_KGDB
-extern void kgdb_config(void);
-#endif
-
 struct resource standard_io_resources[] = {
 	{ "dma1", 0x00, 0x1f, IORESOURCE_BUSY },
 	{ "timer", 0x40, 0x5f, IORESOURCE_BUSY },

@@ -124,10 +120,6 @@ static int __init malta_setup(void)
 	 */
 	enable_dma(4);
 
-#ifdef CONFIG_KGDB
-	kgdb_config ();
-#endif
-
 	if ((mips_revision_corid == MIPS_REVISION_CORID_BONITO64) ||
 	    (mips_revision_corid == MIPS_REVISION_CORID_CORE_20K) ||
 	    (mips_revision_corid == MIPS_REVISION_CORID_CORE_EMUL_BON)) {

Index: linux-2.6.14/arch/mips/mm/extable.c
===================================================================
@@ -3,6 +3,7 @@
  */
 #include <linux/module.h>
 #include <linux/spinlock.h>
+#include <linux/kgdb.h>
 #include <asm/branch.h>
 #include <asm/uaccess.h>
 

@@ -16,6 +17,12 @@ int fixup_exception(struct pt_regs *regs
 
 		return 1;
 	}
+#ifdef CONFIG_KGDB
+	if (atomic_read(&debugger_active) && kgdb_may_fault)
+		/* Restore our previous state. */
+		kgdb_fault_longjmp(kgdb_fault_jmp_regs);
+		/* Not reached. */
+#endif
 
 	return 0;
 }

Index: linux-2.6.14/arch/mips/sibyte/cfe/setup.c
===================================================================
@@ -58,10 +58,6 @@ int cfe_cons_handle;
 extern unsigned long initrd_start, initrd_end;
 #endif
 
-#ifdef CONFIG_KGDB
-extern int kgdb_port;
-#endif
-
 static void ATTRIB_NORET cfe_linux_exit(void *arg)
 {
 	int warm = *(int *)arg;

@@ -242,9 +238,6 @@ void __init prom_init(void)
 	int argc = fw_arg0;
 	char **envp = (char **) fw_arg2;
 	int *prom_vec = (int *) fw_arg3;
-#ifdef CONFIG_KGDB
-	char *arg;
-#endif
 
 	_machine_restart   = cfe_linux_restart;
 	_machine_halt      = cfe_linux_halt;

@@ -308,13 +301,6 @@ void __init prom_init(void)
 		}
 	}
 
-#ifdef CONFIG_KGDB
-	if ((arg = strstr(arcs_cmdline,"kgdb=duart")) != NULL)
-		kgdb_port = (arg[10] == '0') ? 0 : 1;
-	else
-		kgdb_port = 1;
-#endif
-
 #ifdef CONFIG_BLK_DEV_INITRD
 	{
 		char *ptr;

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Index: linux-2.6.14/include/asm-mips/kgdb.h
===================================================================
@@ -0,0 +1,21 @@
+#ifdef __KERNEL__
+#ifndef _ASM_KGDB_H_
+#define _ASM_KGDB_H_
+
+#define BUFMAX			2048
+#define NUMREGBYTES		(90*sizeof(long))
+#define NUMCRITREGBYTES		(12*sizeof(long))
+#define BREAK_INSTR_SIZE	4
+#define BREAKPOINT()		__asm__ __volatile__(		\
+					".globl breakinst\n\t"	\
+					".set\tnoreorder\n\t"	\
+					"nop\n"			\
+					"breakinst:\tbreak\n\t"	\
+					"nop\n\t"		\
+					".set\treorder")
+#define CACHE_FLUSH_IS_SAFE	0
+
+extern int kgdb_early_setup;
+
+#endif				/* _ASM_KGDB_H_ */
+#endif				/* __KERNEL__ */

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Index: linux-2.6.14/arch/ia64/kernel/process.c
===================================================================
@@ -451,6 +451,9 @@ copy_thread (int nr, unsigned long clone
 	 */
 	child_ptregs->cr_ipsr = ((child_ptregs->cr_ipsr | IA64_PSR_BITS_TO_SET)
 				 & ~(IA64_PSR_BITS_TO_CLEAR | IA64_PSR_PP | IA64_PSR_UP));
+#ifdef	CONFIG_KGDB
+	child_ptregs->cr_ipsr |= IA64_PSR_DB;
+#endif
 
 	/*
 	 * NOTE: The calling convention considers all floating point

@@ -679,6 +682,9 @@ kernel_thread (int (*fn)(void *), void *
 	regs.pt.r11 = (unsigned long) arg;	/* 2nd argument */
 	/* Preserve PSR bits, except for bits 32-34 and 37-45, which we can't read.  */
 	regs.pt.cr_ipsr = ia64_getreg(_IA64_REG_PSR) | IA64_PSR_BN;
+#ifdef	CONFIG_KGDB
+	regs.pt.cr_ipsr |= IA64_PSR_DB;
+#endif
 	regs.pt.cr_ifs = 1UL << 63;		/* mark as valid, empty frame */
 	regs.sw.ar_fpsr = regs.pt.ar_fpsr = ia64_getreg(_IA64_REG_AR_FPSR);
 	regs.sw.ar_bspstore = (unsigned long) current + IA64_RBS_OFFSET;

Index: linux-2.6.14/arch/ia64/kernel/smp.c
===================================================================
@@ -47,6 +47,7 @@
 #include <asm/tlbflush.h>
 #include <asm/unistd.h>
 #include <asm/mca.h>
+#include <linux/kgdb.h>
 
 /*
  * Structure and data for smp_call_function(). This is designed to minimise static memory

@@ -66,6 +67,9 @@ static volatile struct call_data_struct 
 
 #define IPI_CALL_FUNC		0
 #define IPI_CPU_STOP		1
+#ifdef	CONFIG_KGDB
+#define	IPI_KGDB_INTERRUPT	2
+#endif
 
 /* This needs to be cacheline aligned because it is written to by *other* CPUs.  */
 static DEFINE_PER_CPU(u64, ipi_operation) ____cacheline_aligned;

@@ -155,6 +159,11 @@ handle_IPI (int irq, void *dev_id, struc
 			      case IPI_CPU_STOP:
 				stop_this_cpu();
 				break;
+#ifdef	CONFIG_KGDB
+			      case IPI_KGDB_INTERRUPT:
+				kgdb_wait_ipi(regs);
+				break;
+#endif
 
 			      default:
 				printk(KERN_CRIT "Unknown IPI on CPU %d: %lu\n", this_cpu, which);

@@ -305,6 +314,14 @@ smp_call_function_single (int cpuid, voi
 }
 EXPORT_SYMBOL(smp_call_function_single);
 
+#ifdef	CONFIG_KGDB
+void
+smp_send_nmi_allbutself(void)
+{
+	send_IPI_allbutself(IPI_KGDB_INTERRUPT);
+}
+#endif
+
 /*
  * this function sends a 'generic call function' IPI to all other CPUs
  * in the system.

Index: linux-2.6.14/arch/ia64/kernel/traps.c
===================================================================
@@ -16,6 +16,7 @@
 #include <linux/module.h>       /* for EXPORT_SYMBOL */
 #include <linux/hardirq.h>
 #include <linux/kprobes.h>
+#include <linux/kgdb.h>
 
 #include <asm/fpswa.h>
 #include <asm/ia32.h>

@@ -109,6 +110,10 @@ die (const char *str, struct pt_regs *re
   	} else
 		printk(KERN_ERR "Recursive die() failure, output suppressed\n");
 
+#ifdef CONFIG_KGDB
+	kgdb_handle_exception(1, SIGTRAP, err, regs);
+#endif
+
 	bust_spinlocks(0);
 	die.lock_owner = -1;
 	spin_unlock_irq(&die.lock);

@@ -158,7 +163,9 @@ __kprobes ia64_bad_break (unsigned long 
 			       	== NOTIFY_STOP) {
 			return;
 		}
+#ifndef	CONFIG_KGDB
 		die_if_kernel("bugcheck!", regs, break_num);
+#endif
 		sig = SIGILL; code = ILL_ILLOPC;
 		break;
 

@@ -220,8 +227,10 @@ __kprobes ia64_bad_break (unsigned long 
 		break;
 
 	      default:
+#ifndef	CONFIG_KGDB
 		if (break_num < 0x40000 || break_num > 0x100000)
 			die_if_kernel("Bad break", regs, break_num);
+#endif
 
 		if (break_num < 0x80000) {
 			sig = SIGILL; code = __ILL_BREAK;

@@ -229,6 +238,15 @@ __kprobes ia64_bad_break (unsigned long 
 			sig = SIGTRAP; code = TRAP_BRKPT;
 		}
 	}
+#ifdef	CONFIG_KGDB
+	/*
+	 * We don't want to trap simulator system calls.
+	 */
+	if (break_num != 0x80001) {
+		kgdb_handle_exception(11, sig, break_num, regs);
+		return;
+	}
+#endif
 	siginfo.si_signo = sig;
 	siginfo.si_errno = 0;
 	siginfo.si_code = code;

@@ -544,10 +562,21 @@ ia64_fault (unsigned long vector, unsign
 		}
 		sprintf(buf, "Unsupported data reference");
 		break;
-
 	      case 29: /* Debug */
-	      case 35: /* Taken Branch Trap */
 	      case 36: /* Single Step Trap */
+#ifdef CONFIG_KGDB
+		if (vector == 36 && !user_mode(&regs) &&
+			kgdb_hwbreak_sstep[smp_processor_id()]) {
+			kgdb_hwbreak_sstep[smp_processor_id()] = 0;
+			regs.cr_ipsr &= ~IA64_PSR_SS;
+			return;
+		} else if (!user_mode(&regs)) {
+			kgdb_handle_exception(vector, SIGTRAP, isr, &regs);
+			return;
+		}
+#endif
+		/* Fall */
+	      case 35: /* Taken Branch Trap */
 		if (fsys_mode(current, &regs)) {
 			extern char __kernel_syscall_via_break[];
 			/*

@@ -665,6 +694,9 @@ ia64_fault (unsigned long vector, unsign
 		sprintf(buf, "Fault %lu", vector);
 		break;
 	}
+#ifdef CONFIG_KGDB
+	kgdb_handle_exception(vector, SIGTRAP, isr, &regs);
+#endif
 	die_if_kernel(buf, &regs, error);
 	force_sig(SIGILL, current);
 }

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Index: linux-2.6.14/arch/ia64/mm/extable.c
===================================================================
@@ -7,6 +7,7 @@
 
 #include <linux/config.h>
 #include <linux/sort.h>
+#include <linux/kgdb.h>
 
 #include <asm/uaccess.h>
 #include <asm/module.h>

@@ -74,6 +75,11 @@ search_extable (const struct exception_t
                 else
                         last = mid - 1;
         }
+#ifdef CONFIG_KGDB
+	if (atomic_read(&debugger_active) && kgdb_may_fault)
+		kgdb_fault_longjmp(kgdb_fault_jmp_regs);
+		/* Not reached. */
+#endif
         return NULL;
 }
 

Index: linux-2.6.14/arch/ia64/mm/fault.c
===================================================================
@@ -249,6 +249,10 @@ ia64_do_page_fault (unsigned long addres
 	 */
 	bust_spinlocks(1);
 
+#ifdef CONFIG_KGDB
+	kgdb_handle_exception(14, SIGSEGV, isr, regs);
+#endif
+
 	if (address < PAGE_SIZE)
 		printk(KERN_ALERT "Unable to handle kernel NULL pointer dereference (address %016lx)\n", address);
 	else

Index: linux-2.6.14/include/asm-ia64/kgdb.h
===================================================================
@@ -0,0 +1,36 @@
+#ifdef __KERNEL__
+#ifndef _ASM_KGDB_H_
+#define _ASM_KGDB_H_
+
+/*
+ * Copyright (C) 2001-2004 Amit S. Kale
+ */
+
+#include <linux/threads.h>
+
+/************************************************************************/
+/* BUFMAX defines the maximum number of characters in inbound/outbound buffers*/
+/* at least NUMREGBYTES*2 are needed for register packets */
+/* Longer buffer is needed to list all threads */
+#define BUFMAX			1024
+
+/* Number of bytes of registers.  We set this to 0 so that certain GDB
+ * packets will fail, forcing the use of others, which are more friendly
+ * on ia64. */
+#define NUMREGBYTES		0
+
+#define NUMCRITREGBYTES		(70*8)
+#define JMP_REGS_ALIGNMENT	__attribute__ ((aligned (16)))
+
+#define BREAKNUM		0x00003333300LL
+#define KGDBBREAKNUM		0x6665UL
+#define BREAKPOINT()		asm volatile ("break.m 0x6665")
+#define BREAK_INSTR_SIZE	16
+#define CACHE_FLUSH_IS_SAFE	1
+
+struct pt_regs;
+extern volatile int kgdb_hwbreak_sstep[NR_CPUS];
+extern void smp_send_nmi_allbutself(void);
+extern void kgdb_wait_ipi(struct pt_regs *);
+#endif				/* _ASM_KGDB_H_ */
+#endif				/* __KERNEL__ */

Index: linux-2.6.14/arch/x86_64/mm/fault.c
===================================================================
@@ -518,6 +518,10 @@ no_context:
 	if (is_errata93(regs, address))
 		return; 
 
+	if (notify_die(DIE_PAGE_FAULT_NO_CONTEXT, "no context", regs,
+				error_code, 14, SIGSEGV) == NOTIFY_STOP)
+		return;
+
 /*
  * Oops. The kernel tried to access some bad page. We'll have to
  * terminate things with extreme prejudice.

Index: linux-2.6.14/include/asm-x86_64/kdebug.h
===================================================================
@@ -33,6 +33,7 @@ enum die_val { 
 	DIE_CALL,
 	DIE_NMI_IPI,
 	DIE_PAGE_FAULT,
+	DIE_PAGE_FAULT_NO_CONTEXT,
 }; 
 	
 static inline int notify_die(enum die_val val,char *str,struct pt_regs *regs,long err,int trap, int sig)

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Index: linux-2.6.14/include/asm-x86_64/system.h
===================================================================
@@ -27,7 +27,9 @@
 	,"rcx","rbx","rdx","r8","r9","r10","r11","r12","r13","r14","r15"
 
 #define switch_to(prev,next,last) \
-	asm volatile(SAVE_CONTEXT						    \
+       asm volatile(".globl __switch_to_begin\n\t"				    \
+		     "__switch_to_begin:\n\t"					  \
+		     SAVE_CONTEXT						  \
 		     "movq %%rsp,%P[threadrsp](%[prev])\n\t" /* save RSP */	  \
 		     "movq %P[threadrsp](%[next]),%%rsp\n\t" /* restore RSP */	  \
 		     "call __switch_to\n\t"					  \

@@ -39,6 +41,8 @@
 		     "movq %%rax,%%rdi\n\t" 					  \
 		     "jc   ret_from_fork\n\t"					  \
 		     RESTORE_CONTEXT						    \
+		     ".globl __switch_to_end\n\t"				  \
+		     "__switch_to_end:\n\t"					  \
 		     : "=a" (last)					  	  \
 		     : [next] "S" (next), [prev] "D" (prev),			  \
 		       [threadrsp] "i" (offsetof(struct task_struct, thread.rsp)), \

Index: linux-2.6.14/include/linux/kgdb.h
===================================================================
@@ -24,6 +24,10 @@
 #include <linux/linkage.h>
 #include <linux/init.h>
 
+#ifndef CHECK_EXCEPTION_STACK
+#define CHECK_EXCEPTION_STACK()	1
+#endif
+
 struct tasklet_struct;
 struct pt_regs;
 struct task_struct;

Index: linux-2.6.14/kernel/kgdb.c
===================================================================
@@ -1629,7 +1629,8 @@ void kgdb_unregister_io_module(struct kg
  */
 static void kgdb_tasklet_bpt(unsigned long ing)
 {
-	breakpoint();
+	if(CHECK_EXCEPTION_STACK())
+		breakpoint();
 }
 
 DECLARE_TASKLET(kgdb_tasklet_breakpoint, kgdb_tasklet_bpt, 0);

@@ -1640,6 +1641,17 @@ DECLARE_TASKLET(kgdb_tasklet_breakpoint,
  */
 static void __init kgdb_early_entry(void)
 {
+	/*
+	 * Don't try and do anything until the architecture is able to
+	 * setup the exception stack.  In this case, it is up to the
+	 * architecture to hook in and look at us when they are ready.
+	 */
+	if(!CHECK_EXCEPTION_STACK()) {
+		kgdb_initialized = -1;
+		tasklet_schedule(&kgdb_tasklet_breakpoint);
+		return;
+	}
+
 	/* Let the architecture do any setup that it needs to. */
 	kgdb_arch_init();
 

Index: linux-2.6.14/arch/sh/boards/se/7751/setup.c
===================================================================
@@ -18,10 +18,6 @@
 #include <asm/io.h>
 #include <asm/se7751/se7751.h>
 
-#ifdef CONFIG_SH_KGDB
-#include <asm/kgdb.h>
-#endif
-
 /*
  * Configure the Super I/O chip
  */

@@ -83,12 +79,6 @@ const char *get_system_type(void)
 	return "7751 SolutionEngine";
 }
 
-#ifdef CONFIG_SH_KGDB
-static int kgdb_uart_setup(void);
-static struct kgdb_sermap kgdb_uart_sermap = 
-{ "ttyS", 0, kgdb_uart_setup, NULL };
-#endif
- 
 /*
  * Initialize the board
  */

@@ -96,133 +86,4 @@ void __init platform_setup(void)
 {
 	/* Call init_smsc() replacement to set up SuperIO. */
 	/* XXX: RTC setting comes here */
-#ifdef CONFIG_SH_KGDB
-	kgdb_register_sermap(&kgdb_uart_sermap);
-#endif
-}
-
-/*********************************************************************
- * Currently a hack (e.g. does not interact well w/serial.c, lots of *
- * hardcoded stuff) but may be useful if SCI/F needs debugging.      *
- * Mostly copied from x86 code (see files asm-i386/kgdb_local.h and  *
- * arch/i386/lib/kgdb_serial.c).                                     *
- *********************************************************************/
-
-#ifdef CONFIG_SH_KGDB
-#include <linux/types.h>
-#include <linux/serial.h>
-#include <linux/serialP.h>
-#include <linux/serial_reg.h>
-
-#define COM1_PORT 0x3f8  /* Base I/O address */
-#define COM1_IRQ  4      /* IRQ not used yet */
-#define COM2_PORT 0x2f8  /* Base I/O address */
-#define COM2_IRQ  3      /* IRQ not used yet */
-
-#define SB_CLOCK 1843200 /* Serial baud clock */
-#define SB_BASE (SB_CLOCK/16)
-#define SB_MCR UART_MCR_OUT2 | UART_MCR_DTR | UART_MCR_RTS
-
-struct uart_port {
-	int base;
-};
-#define UART_NPORTS 2
-struct uart_port uart_ports[] = {
-	{ COM1_PORT },
-	{ COM2_PORT },
-};
-struct uart_port *kgdb_uart_port;
-
-#define UART_IN(reg)	inb_p(kgdb_uart_port->base + reg)
-#define UART_OUT(reg,v)	outb_p((v), kgdb_uart_port->base + reg)
-
-/* Basic read/write functions for the UART */
-#define UART_LSR_RXCERR    (UART_LSR_BI | UART_LSR_FE | UART_LSR_PE)
-static int kgdb_uart_getchar(void)
-{
-	int lsr;
-	int c = -1;
-
-	while (c == -1) {
-		lsr = UART_IN(UART_LSR);
-		if (lsr & UART_LSR_DR) 
-			c = UART_IN(UART_RX);
-		if ((lsr & UART_LSR_RXCERR))
-			c = -1;
-	}
-	return c;
-}
-
-static void kgdb_uart_putchar(int c)
-{
-	while ((UART_IN(UART_LSR) & UART_LSR_THRE) == 0)
-		;
-	UART_OUT(UART_TX, c);
-}
-
-/*
- * Initialize UART to configured/requested values.
- * (But we don't interrupts yet, or interact w/serial.c)
- */
-static int kgdb_uart_setup(void)
-{
-	int port;
-	int lcr = 0;
-	int bdiv = 0;
-
-	if (kgdb_portnum >= UART_NPORTS) {
-		KGDB_PRINTK("uart port %d invalid.\n", kgdb_portnum);
-		return -1;
-	}
-
-	kgdb_uart_port = &uart_ports[kgdb_portnum];
-
-	/* Init sequence from gdb_hook_interrupt */
-	UART_IN(UART_RX);
-	UART_OUT(UART_IER, 0);
-
-	UART_IN(UART_RX);	/* Serial driver comments say */
-	UART_IN(UART_IIR);	/* this clears interrupt regs */
-	UART_IN(UART_MSR);
-
-	/* Figure basic LCR values */
-	switch (kgdb_bits) {
-	case '7':
-		lcr |= UART_LCR_WLEN7;
-		break;
-	default: case '8': 
-		lcr |= UART_LCR_WLEN8;
-		break;
-	}
-	switch (kgdb_parity) {
-	case 'O':
-		lcr |= UART_LCR_PARITY;
-		break;
-	case 'E':
-		lcr |= (UART_LCR_PARITY | UART_LCR_EPAR);
-		break;
-	default: break;
-	}
-
-	/* Figure the baud rate divisor */
-	bdiv = (SB_BASE/kgdb_baud);
-	
-	/* Set the baud rate and LCR values */
-	UART_OUT(UART_LCR, (lcr | UART_LCR_DLAB));
-	UART_OUT(UART_DLL, (bdiv & 0xff));
-	UART_OUT(UART_DLM, ((bdiv >> 8) & 0xff));
-	UART_OUT(UART_LCR, lcr);
-
-	/* Set the MCR */
-	UART_OUT(UART_MCR, SB_MCR);
-
-	/* Turn off FIFOs for now */
-	UART_OUT(UART_FCR, 0);
-
-	/* Setup complete: initialize function pointers */
-	kgdb_getchar = kgdb_uart_getchar;
-	kgdb_putchar = kgdb_uart_putchar;
-
-	return 0;
 }
-#endif /* CONFIG_SH_KGDB */

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Index: linux-2.6.14/arch/sh/kernel/time.c
===================================================================
@@ -34,9 +34,6 @@
 #include <asm/rtc.h>
 #include <asm/freq.h>
 #include <asm/cpu/timer.h>
-#ifdef CONFIG_SH_KGDB
-#include <asm/kgdb.h>
-#endif
 
 #include <linux/timex.h>
 #include <linux/irq.h>

@@ -643,12 +640,4 @@ void __init time_init(void)
 	ctrl_outl(interval, TMU0_TCOR);
 	ctrl_outl(interval, TMU0_TCNT);
 	ctrl_outb(TMU_TSTR_INIT, TMU_TSTR);
-
-#if defined(CONFIG_SH_KGDB)
-	/*
-	 * Set up kgdb as requested. We do it here because the serial
-	 * init uses the timer vars we just set up for figuring baud.
-	 */
-	kgdb_init();
-#endif
 }

Index: linux-2.6.14/arch/sh/kernel/traps.c
===================================================================
@@ -27,6 +27,7 @@
 #include <linux/spinlock.h>
 #include <linux/module.h>
 #include <linux/kallsyms.h>
+#include <linux/kgdb.h>
 
 #include <asm/system.h>
 #include <asm/uaccess.h>

@@ -35,17 +36,8 @@
 #include <asm/processor.h>
 #include <asm/sections.h>
 
-#ifdef CONFIG_SH_KGDB
-#include <asm/kgdb.h>
-#define CHK_REMOTE_DEBUG(regs)                                               \
-{                                                                            \
-  if ((kgdb_debug_hook != (kgdb_debug_hook_t *) NULL) && (!user_mode(regs))) \
-  {                                                                          \
-    (*kgdb_debug_hook)(regs);                                                \
-  }                                                                          \
-}
-#else
-#define CHK_REMOTE_DEBUG(regs)
+#ifndef CONFIG_KGDB
+#define kgdb_handle_exception(t, s, e, r)
 #endif
 
 #define DO_ERROR(trapnr, signr, str, name, tsk)				\

@@ -66,7 +58,7 @@ asmlinkage void do_##name(unsigned long 
 	local_irq_enable();						\
 	tsk->thread.error_code = error_code;				\
 	tsk->thread.trap_no = trapnr;					\
-        CHK_REMOTE_DEBUG(&regs);					\
+	kgdb_handle_exception(trapnr, signr, error_code, &regs);	\
 	force_sig(signr, tsk);						\
 	die_if_no_fixup(str,&regs,error_code);				\
 }

@@ -93,10 +85,12 @@ void die(const char * str, struct pt_reg
 {
 	static int die_counter;
 
+#ifdef CONFIG_KGDB
+	kgdb_handle_exception(1, SIGTRAP, err, regs);
+#endif
 	console_verbose();
 	spin_lock_irq(&die_lock);
 	printk("%s: %04lx [#%d]\n", str, err & 0xffff, ++die_counter);
-	CHK_REMOTE_DEBUG(regs);
 	show_regs(regs);
 	spin_unlock_irq(&die_lock);
 	do_exit(SIGSEGV);

Index: linux-2.6.14/arch/sh/mm/extable.c
===================================================================
@@ -6,6 +6,7 @@
 
 #include <linux/config.h>
 #include <linux/module.h>
+#include <linux/kgdb.h>
 #include <asm/uaccess.h>
 
 int fixup_exception(struct pt_regs *regs)

@@ -17,6 +18,12 @@ int fixup_exception(struct pt_regs *regs
 		regs->pc = fixup->fixup;
 		return 1;
 	}
+#ifdef CONFIG_KGDB
+	if (atomic_read(&debugger_active) && kgdb_may_fault)
+		/* Restore our previous state. */
+		kgdb_fault_longjmp(kgdb_fault_jmp_regs);
+		/* Never reached. */
+#endif
 
 	return 0;
 }

Index: linux-2.6.14/arch/sh/mm/fault.c
===================================================================
@@ -28,7 +28,6 @@
 #include <asm/pgalloc.h>
 #include <asm/mmu_context.h>
 #include <asm/cacheflush.h>
-#include <asm/kgdb.h>
 
 extern void die(const char *,struct pt_regs *,long);
 

@@ -45,11 +44,6 @@ asmlinkage void do_page_fault(struct pt_
 	struct vm_area_struct * vma;
 	unsigned long page;
 
-#ifdef CONFIG_SH_KGDB
-	if (kgdb_nofault && kgdb_bus_err_hook)
-		kgdb_bus_err_hook();
-#endif
-
 	tsk = current;
 	mm = tsk->mm;
 

@@ -153,6 +147,7 @@ no_context:
 	}
 	die("Oops", regs, writeaccess);
 	do_exit(SIGKILL);
+	dump_stack();
 
 /*
  * We ran out of memory, or some other thing happened to us that made

@@ -199,11 +194,6 @@ asmlinkage int __do_page_fault(struct pt
 	pte_t *pte;
 	pte_t entry;
 
-#ifdef CONFIG_SH_KGDB
-	if (kgdb_nofault && kgdb_bus_err_hook)
-		kgdb_bus_err_hook();
-#endif
-
 #ifdef CONFIG_SH_STORE_QUEUES
 	addrmax = P4SEG_STORE_QUE + 0x04000000;
 #endif

Index: linux-2.6.14/arch/sh/mm/fault-nommu.c
===================================================================
@@ -29,10 +29,6 @@
 #include <asm/mmu_context.h>
 #include <asm/cacheflush.h>
 
-#if defined(CONFIG_SH_KGDB)
-#include <asm/kgdb.h>
-#endif
-
 extern void die(const char *,struct pt_regs *,long);
 
 /*

@@ -43,11 +39,6 @@ extern void die(const char *,struct pt_r
 asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long writeaccess,
 			      unsigned long address)
 {
-#if defined(CONFIG_SH_KGDB)
-	if (kgdb_nofault && kgdb_bus_err_hook)
-		kgdb_bus_err_hook();
-#endif
-
 	/*
 	 * Oops. The kernel tried to access some bad page. We'll have to
 	 * terminate things with extreme prejudice.

@@ -69,11 +60,6 @@ asmlinkage void do_page_fault(struct pt_
 asmlinkage int __do_page_fault(struct pt_regs *regs, unsigned long writeaccess,
 			       unsigned long address)
 {
-#if defined(CONFIG_SH_KGDB)
-	if (kgdb_nofault && kgdb_bus_err_hook)
-		kgdb_bus_err_hook();
-#endif
-
 	if (address >= TASK_SIZE)
 		return 1;
 

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Index: linux-2.6.14/include/asm-sh/system.h
===================================================================

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Index: linux-2.6.14/arch/arm/kernel/kgdb.c
===================================================================
@@ -0,0 +1,208 @@
+/*
+ * arch/arm/kernel/kgdb.c
+ *
+ * ARM KGDB support
+ *
+ * Copyright (c) 2002-2004 MontaVista Software, Inc
+ *
+ * Authors:  George Davis <[email protected]>
+ *           Deepak Saxena <[email protected]>
+ */
+#include <linux/config.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/spinlock.h>
+#include <linux/personality.h>
+#include <linux/ptrace.h>
+#include <linux/elf.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/kgdb.h>
+
+#include <asm/atomic.h>
+#include <asm/io.h>
+#include <asm/pgtable.h>
+#include <asm/system.h>
+#include <asm/uaccess.h>
+#include <asm/unistd.h>
+#include <asm/ptrace.h>
+#include <asm/traps.h>
+
+/* Make a local copy of the registers passed into the handler (bletch) */
+void regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *kernel_regs)
+{
+	int regno;
+
+	/* Initialize all to zero (??) */
+	for (regno = 0; regno < GDB_MAX_REGS; regno++)
+		gdb_regs[regno] = 0;
+
+	gdb_regs[_R0] = kernel_regs->ARM_r0;
+	gdb_regs[_R1] = kernel_regs->ARM_r1;
+	gdb_regs[_R2] = kernel_regs->ARM_r2;
+	gdb_regs[_R3] = kernel_regs->ARM_r3;
+	gdb_regs[_R4] = kernel_regs->ARM_r4;
+	gdb_regs[_R5] = kernel_regs->ARM_r5;
+	gdb_regs[_R6] = kernel_regs->ARM_r6;
+	gdb_regs[_R7] = kernel_regs->ARM_r7;
+	gdb_regs[_R8] = kernel_regs->ARM_r8;
+	gdb_regs[_R9] = kernel_regs->ARM_r9;
+	gdb_regs[_R10] = kernel_regs->ARM_r10;
+	gdb_regs[_FP] = kernel_regs->ARM_fp;
+	gdb_regs[_IP] = kernel_regs->ARM_ip;
+	gdb_regs[_SP] = kernel_regs->ARM_sp;
+	gdb_regs[_LR] = kernel_regs->ARM_lr;
+	gdb_regs[_PC] = kernel_regs->ARM_pc;
+	gdb_regs[_CPSR] = kernel_regs->ARM_cpsr;
+}
+
+/* Copy local gdb registers back to kgdb regs, for later copy to kernel */
+void gdb_regs_to_regs(unsigned long *gdb_regs, struct pt_regs *kernel_regs)
+{
+	kernel_regs->ARM_r0 = gdb_regs[_R0];
+	kernel_regs->ARM_r1 = gdb_regs[_R1];
+	kernel_regs->ARM_r2 = gdb_regs[_R2];
+	kernel_regs->ARM_r3 = gdb_regs[_R3];
+	kernel_regs->ARM_r4 = gdb_regs[_R4];
+	kernel_regs->ARM_r5 = gdb_regs[_R5];
+	kernel_regs->ARM_r6 = gdb_regs[_R6];
+	kernel_regs->ARM_r7 = gdb_regs[_R7];
+	kernel_regs->ARM_r8 = gdb_regs[_R8];
+	kernel_regs->ARM_r9 = gdb_regs[_R9];
+	kernel_regs->ARM_r10 = gdb_regs[_R10];
+	kernel_regs->ARM_fp = gdb_regs[_FP];
+	kernel_regs->ARM_ip = gdb_regs[_IP];
+	kernel_regs->ARM_sp = gdb_regs[_SP];
+	kernel_regs->ARM_lr = gdb_regs[_LR];
+	kernel_regs->ARM_pc = gdb_regs[_PC];
+	kernel_regs->ARM_cpsr = gdb_regs[GDB_MAX_REGS - 1];
+}
+
+static inline struct pt_regs *kgdb_get_user_regs(struct task_struct *task)
+{
+	return (struct pt_regs *)
+	    ((unsigned long)task->thread_info + THREAD_SIZE -
+	     8 - sizeof(struct pt_regs));
+}
+
+void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs,
+				 struct task_struct *task)
+{
+	int regno;
+	struct pt_regs *thread_regs;
+
+	/* Just making sure... */
+	if (task == NULL)
+		return;
+
+	/* Initialize to zero */
+	for (regno = 0; regno < GDB_MAX_REGS; regno++)
+		gdb_regs[regno] = 0;
+
+	/* Otherwise, we have only some registers from switch_to() */
+	thread_regs = kgdb_get_user_regs(task);
+	gdb_regs[_R0] = thread_regs->ARM_r0;	/* Not really valid? */
+	gdb_regs[_R1] = thread_regs->ARM_r1;	/* "               " */
+	gdb_regs[_R2] = thread_regs->ARM_r2;	/* "               " */
+	gdb_regs[_R3] = thread_regs->ARM_r3;	/* "               " */
+	gdb_regs[_R4] = thread_regs->ARM_r4;
+	gdb_regs[_R5] = thread_regs->ARM_r5;
+	gdb_regs[_R6] = thread_regs->ARM_r6;
+	gdb_regs[_R7] = thread_regs->ARM_r7;
+	gdb_regs[_R8] = thread_regs->ARM_r8;
+	gdb_regs[_R9] = thread_regs->ARM_r9;
+	gdb_regs[_R10] = thread_regs->ARM_r10;
+	gdb_regs[_FP] = thread_regs->ARM_fp;
+	gdb_regs[_IP] = thread_regs->ARM_ip;
+	gdb_regs[_SP] = thread_regs->ARM_sp;
+	gdb_regs[_LR] = thread_regs->ARM_lr;
+	gdb_regs[_PC] = thread_regs->ARM_pc;
+	gdb_regs[_CPSR] = thread_regs->ARM_cpsr;
+}
+
+static int compiled_break;
+
+int kgdb_arch_handle_exception(int exception_vector, int signo,
+			       int err_code, char *remcom_in_buffer,
+			       char *remcom_out_buffer,
+			       struct pt_regs *linux_regs)
+{
+	long addr;
+	char *ptr;
+
+	switch (remcom_in_buffer[0]) {
+	case 'c':
+		kgdb_contthread = NULL;
+
+		/*
+		 * Try to read optional parameter, pc unchanged if no parm.
+		 * If this was a compiled breakpoint, we need to move
+		 * to the next instruction or we will just breakpoint
+		 * over and over again.
+		 */
+		ptr = &remcom_in_buffer[1];
+		if (kgdb_hex2long(&ptr, &addr)) {
+			linux_regs->ARM_pc = addr;
+		} else if (compiled_break == 1) {
+			linux_regs->ARM_pc += 4;
+		}
+
+		compiled_break = 0;
+
+		return 0;
+	}
+
+	return -1;
+}
+
+static int kgdb_brk_fn(struct pt_regs *regs, unsigned int instr)
+{
+	kgdb_handle_exception(1, SIGTRAP, 0, regs);
+
+	return 0;
+}
+
+static int kgdb_compiled_brk_fn(struct pt_regs *regs, unsigned int instr)
+{
+	compiled_break = 1;
+	kgdb_handle_exception(1, SIGTRAP, 0, regs);
+
+	return 0;
+}
+
+static struct undef_hook kgdb_brkpt_hook = {
+	.instr_mask = 0xffffffff,
+	.instr_val = KGDB_BREAKINST,
+	.fn = kgdb_brk_fn
+};
+
+static struct undef_hook kgdb_compiled_brkpt_hook = {
+	.instr_mask = 0xffffffff,
+	.instr_val = KGDB_COMPILED_BREAK,
+	.fn = kgdb_compiled_brk_fn
+};
+
+/*
+ * Register our undef instruction hooks with ARM undef core.
+ * We regsiter a hook specifically looking for the KGB break inst
+ * and we handle the normal undef case within the do_undefinstr
+ * handler.
+ */
+int kgdb_arch_init(void)
+{
+	register_undef_hook(&kgdb_brkpt_hook);
+	register_undef_hook(&kgdb_compiled_brkpt_hook);
+
+	return 0;
+}
+
+struct kgdb_arch arch_kgdb_ops = {
+#ifndef __ARMEB__
+	.gdb_bpt_instr = {0xfe, 0xde, 0xff, 0xe7}
+#else
+	.gdb_bpt_instr = {0xe7, 0xff, 0xde, 0xfe}
+#endif
+};

Index: linux-2.6.14/arch/arm/kernel/setup.c
===================================================================
@@ -785,6 +785,11 @@ void __init setup_arch(char **cmdline_p)
 	conswitchp = &dummy_con;
 #endif
 #endif
+
+#if	defined(CONFIG_KGDB)
+	extern void __init early_trap_init(void);
+	early_trap_init();
+#endif
 }
 
 

Index: linux-2.6.14/arch/arm/kernel/traps.c
===================================================================
@@ -270,6 +270,7 @@ asmlinkage void do_undefinstr(struct pt_
 	unsigned int instr;
 	struct undef_hook *hook;
 	siginfo_t info;
+	mm_segment_t fs;
 	void __user *pc;
 
 	/*

@@ -279,12 +280,15 @@ asmlinkage void do_undefinstr(struct pt_
 	 */
 	regs->ARM_pc -= correction;
 
+	fs = get_fs();
+	set_fs(KERNEL_DS);
 	pc = (void __user *)instruction_pointer(regs);
 	if (thumb_mode(regs)) {
 		get_user(instr, (u16 __user *)pc);
 	} else {
 		get_user(instr, (u32 __user *)pc);
 	}
+	set_fs(fs);
 
 	spin_lock_irq(&undef_lock);
 	list_for_each_entry(hook, &undef_hook, node) {

@@ -670,6 +674,13 @@ EXPORT_SYMBOL(abort);
 
 void __init trap_init(void)
 {
+#if	defined(CONFIG_KGDB)
+	return;
+}
+
+void __init early_trap_init(void)
+{
+#endif
 	extern char __stubs_start[], __stubs_end[];
 	extern char __vectors_start[], __vectors_end[];
 	extern char __kuser_helper_start[], __kuser_helper_end[];

Index: linux-2.6.14/arch/arm/mach-ixp2000/core.c
===================================================================
@@ -34,6 +34,7 @@
 #include <asm/system.h>
 #include <asm/tlbflush.h>
 #include <asm/pgtable.h>
+#include <asm/kgdb.h>
 
 #include <asm/mach/map.h>
 #include <asm/mach/time.h>

@@ -144,6 +145,10 @@ void __init ixp2000_map_io(void)
 
 	iotable_init(ixp2000_io_desc, ARRAY_SIZE(ixp2000_io_desc));
 
+#ifdef CONFIG_KGDB_8250
+	kgdb8250_add_port(0, &ixp2000_serial_port);
+#endif
+
 	/* Set slowport to 8-bit mode.  */
 	ixp2000_reg_write(IXP2000_SLOWPORT_FRM, 1);
 }

Index: linux-2.6.14/arch/arm/mach-ixp2000/ixdp2x01.c
===================================================================
@@ -38,6 +38,7 @@
 #include <asm/system.h>
 #include <asm/hardware.h>
 #include <asm/mach-types.h>
+#include <asm/kgdb.h>
 
 #include <asm/mach/pci.h>
 #include <asm/mach/map.h>

@@ -175,6 +176,11 @@ static void __init ixdp2x01_map_io(void)
 
 	early_serial_setup(&ixdp2x01_serial_ports[0]);
 	early_serial_setup(&ixdp2x01_serial_ports[1]);
+
+#ifdef CONFIG_KGDB_8250
+	kgdb8250_add_port(0, &ixdp2x01_serial_ports[0]);
+	kgdb8250_add_port(1, &ixdp2x01_serial_ports[1]);
+#endif
 }
 
 

Index: linux-2.6.14/arch/arm/mach-ixp4xx/coyote-setup.c
===================================================================
@@ -91,9 +91,12 @@ static void __init coyote_init(void)
 		coyote_uart_data[0].irq = IRQ_IXP4XX_UART1;
 	}
 
-
 	ixp4xx_sys_init();
 	platform_add_devices(coyote_devices, ARRAY_SIZE(coyote_devices));
+
+#ifdef CONFIG_KGDB_8250
+	kgdb8250_add_port(0, &coyote_serial_port);
+#endif
 }
 
 #ifdef CONFIG_ARCH_ADI_COYOTE

Index: linux-2.6.14/arch/arm/mach-ixp4xx/ixdp425-setup.c
===================================================================
@@ -23,6 +23,7 @@
 #include <asm/irq.h>
 #include <asm/mach/arch.h>
 #include <asm/mach/flash.h>
+#include <asm/kgdb.h>
 
 static struct flash_platform_data ixdp425_flash_data = {
 	.map_name	= "cfi_probe",

@@ -77,7 +78,8 @@ static struct plat_serial8250_port ixdp4
 		.mapbase	= IXP4XX_UART1_BASE_PHYS,
 		.membase	= (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET,
 		.irq		= IRQ_IXP4XX_UART1,
-		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
+		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST |
+					UPF_SHARE_IRQ,
 		.iotype		= UPIO_MEM,
 		.regshift	= 2,
 		.uartclk	= IXP4XX_UART_XTAL,

@@ -86,7 +88,8 @@ static struct plat_serial8250_port ixdp4
 		.mapbase	= IXP4XX_UART2_BASE_PHYS,
 		.membase	= (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET,
 		.irq		= IRQ_IXP4XX_UART1,
-		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
+		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST |
+					UPF_SHARE_IRQ,
 		.iotype		= UPIO_MEM,
 		.regshift	= 2,
 		.uartclk	= IXP4XX_UART_XTAL,

@@ -121,6 +124,11 @@ static void __init ixdp425_init(void)
 	}
 
 	platform_add_devices(ixdp425_devices, ARRAY_SIZE(ixdp425_devices));
+
+#ifdef CONFIG_KGDB_8250
+	kgdb8250_add_port(0, &ixdp425_serial_ports[0]);
+	kgdb8250_add_port(1, &ixdp425_serial_ports[1]);
+#endif
 }
 
 #ifdef CONFIG_ARCH_IXDP425

Index: linux-2.6.14/arch/arm/mach-omap1/board-osk.c
===================================================================
@@ -46,7 +46,7 @@
 #include <asm/arch/tc.h>
 #include <asm/arch/common.h>
 
-static int __initdata osk_serial_ports[OMAP_MAX_NR_PORTS] = {1, 0, 0};
+static int __initdata osk_serial_ports[OMAP_MAX_NR_PORTS] = {1, 1, 1};
 
 static struct mtd_partition osk_partitions[] = {
 	/* bootloader (U-Boot, etc) in first sector */

Index: linux-2.6.14/arch/arm/mach-omap1/serial.c
===================================================================
@@ -15,6 +15,7 @@
 #include <linux/delay.h>
 #include <linux/serial.h>
 #include <linux/tty.h>
+#include <linux/kgdb.h>
 #include <linux/serial_8250.h>
 #include <linux/serial_reg.h>
 

@@ -194,6 +195,9 @@ void __init omap_serial_init(int ports[O
 			break;
 		}
 		omap_serial_reset(&serial_platform_data[i]);
+#ifdef CONFIG_KGDB_8250
+		kgdb8250_add_platform_port(i, &serial_platform_data[i]);
+#endif
 	}
 }
 

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Index: linux-2.6.14/arch/arm/mm/extable.c
===================================================================
@@ -2,6 +2,7 @@
  *  linux/arch/arm/mm/extable.c
  */
 #include <linux/module.h>
+#include <linux/kgdb.h>
 #include <asm/uaccess.h>
 
 int fixup_exception(struct pt_regs *regs)

@@ -11,6 +12,12 @@ int fixup_exception(struct pt_regs *regs
 	fixup = search_exception_tables(instruction_pointer(regs));
 	if (fixup)
 		regs->ARM_pc = fixup->fixup;
+#ifdef CONFIG_KGDB
+	if (atomic_read(&debugger_active) && kgdb_may_fault)
+		/* Restore our previous state. */
+		kgdb_fault_longjmp(kgdb_fault_jmp_regs);
+		/* Not reached. */
+#endif
 
 	return fixup != NULL;
 }

Index: linux-2.6.14/drivers/serial/amba-pl011.c
===================================================================
@@ -350,7 +350,7 @@ static int pl011_startup(struct uart_por
 	/*
 	 * Allocate the IRQ
 	 */
-	retval = request_irq(uap->port.irq, pl011_int, 0, "uart-pl011", uap);
+	retval = request_irq(uap->port.irq, pl011_int, SA_SHIRQ, "uart-pl011", uap);
 	if (retval)
 		goto clk_dis;
 

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Index: linux-2.6.14/arch/ppc64/kernel/setup.c
===================================================================
@@ -33,6 +33,7 @@
 #include <linux/unistd.h>
 #include <linux/serial.h>
 #include <linux/serial_8250.h>
+#include <linux/kgdb.h>
 #include <asm/io.h>
 #include <asm/prom.h>
 #include <asm/processor.h>

@@ -1219,6 +1220,11 @@ void __init generic_find_legacy_serial_p
 		    serial_ports[index].irq,
 		    serial_ports[index].uartclk);
 
+#ifdef CONFIG_KGDB_8250
+		/* Tell KGDB about this. */
+		kgdb8250_add_platform_port(index, &serial_ports[index]);
+#endif
+
 		/* Get phys address of IO reg for port 1 */
 		if (index != 0)
 			goto next_port;

Index: linux-2.6.14/arch/ppc64/mm/fault.c
===================================================================
@@ -30,6 +30,7 @@
 #include <linux/smp_lock.h>
 #include <linux/module.h>
 #include <linux/kprobes.h>
+#include <linux/kgdb.h>
 
 #include <asm/page.h>
 #include <asm/pgtable.h>

@@ -327,6 +328,13 @@ void bad_page_fault(struct pt_regs *regs
 		regs->nip = entry->fixup;
 		return;
 	}
+#ifdef CONFIG_KGDB
+	if (atomic_read(&debugger_active) && kgdb_may_fault) {
+		/* Restore our previous state. */
+		kgdb_fault_longjmp(kgdb_fault_jmp_regs);
+		/* Not reached. */
+	}
+#endif
 
 	/* kernel has accessed a bad area */
 	die("Kernel access of bad area", regs, sig);

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