core-lite.patch

Linux-2.6.18内核调试工具补丁程序KGDB。

+ *	cause a fault.  When this happens, we trap it, restore state to
+ *	this call, and let ourself know that something bad has happened.
+ */
+extern asmlinkage int kgdb_fault_setjmp(unsigned long *curr_context);
+
+/**
+ *	kgdb_fault_longjmp - Restore state when we have faulted.
+ *	@curr_context: The previously stored state.
+ *
+ *	When something bad does happen, this function is called to
+ *	restore the known good state, and set the return value to 1, so
+ *	we know something bad happened.
+ */
+extern asmlinkage void kgdb_fault_longjmp(unsigned long *curr_context);
+
+/* Optional functions. */
+extern int kgdb_arch_init(void);
+extern void kgdb_disable_hw_debug(struct pt_regs *regs);
+extern void kgdb_post_master_code(struct pt_regs *regs, int e_vector,
+				  int err_code);
+extern void kgdb_roundup_cpus(unsigned long flags);
+extern int kgdb_set_hw_break(unsigned long addr);
+extern int kgdb_remove_hw_break(unsigned long addr);
+extern void kgdb_remove_all_hw_break(void);
+extern void kgdb_correct_hw_break(void);
+extern void kgdb_shadowinfo(struct pt_regs *regs, char *buffer,
+			    unsigned threadid);
+extern struct task_struct *kgdb_get_shadow_thread(struct pt_regs *regs,
+						  int threadid);
+extern struct pt_regs *kgdb_shadow_regs(struct pt_regs *regs, int threadid);
+extern int kgdb_validate_break_address(unsigned long addr);
+extern int kgdb_arch_set_breakpoint(unsigned long addr, char *saved_instr);
+extern int kgdb_arch_remove_breakpoint(unsigned long addr, char *bundle);
+
+/**
+ * struct kgdb_arch - Desribe architecture specific values.
+ * @gdb_bpt_instr: The instruction to trigger a breakpoint.
+ * @flags: Flags for the breakpoint, currently just %KGDB_HW_BREAKPOINT.
+ * @shadowth: A value of %1 indicates we shadow information on processes.
+ * @set_breakpoint: Allow an architecture to specify how to set a software
+ * breakpoint.
+ * @remove_breakpoint: Allow an architecture to specify how to remove a
+ * software breakpoint.
+ * @set_hw_breakpoint: Allow an architecture to specify how to set a hardware
+ * breakpoint.
+ * @remove_hw_breakpoint: Allow an architecture to specify how to remove a
+ * hardware breakpoint.
+ *
+ * The @shadowth flag is an option to shadow information not retrievable by
+ * gdb otherwise.  This is deprecated in favor of a binutils which supports
+ * CFI macros.
+ */
+struct kgdb_arch {
+	unsigned char gdb_bpt_instr[BREAK_INSTR_SIZE];
+	unsigned long flags;
+	unsigned shadowth;
+	int (*set_breakpoint) (unsigned long, char *);
+	int (*remove_breakpoint)(unsigned long, char *);
+	int (*set_hw_breakpoint)(unsigned long, int, enum kgdb_bptype);
+	int (*remove_hw_breakpoint)(unsigned long, int, enum kgdb_bptype);
+};
+
+/* Thread reference */
+typedef unsigned char threadref[8];
+
+/**
+ * struct kgdb_io - Desribe the interface for an I/O driver to talk with KGDB.
+ * @read_char: Pointer to a function that will return one char.
+ * @write_char: Pointer to a function that will write one char.
+ * @flush: Pointer to a function that will flush any pending writes.
+ * @init: Pointer to a function that will initialize the device.
+ * @late_init: Pointer to a function that will do any setup that has
+ * other dependencies.
+ * @pre_exception: Pointer to a function that will do any prep work for
+ * the I/O driver.
+ * @post_exception: Pointer to a function that will do any cleanup work
+ * for the I/O driver.
+ *
+ * The @init and @late_init function pointers allow for an I/O driver
+ * such as a serial driver to fully initialize the port with @init and
+ * be called very early, yet safely call request_irq() later in the boot
+ * sequence.
+ *
+ * @init is allowed to return a non-0 return value to indicate failure.
+ * If this is called early on, then KGDB will try again when it would call
+ * @late_init.  If it has failed later in boot as well, the user will be
+ * notified.
+ */
+struct kgdb_io {
+	int (*read_char) (void);
+	void (*write_char) (u8);
+	void (*flush) (void);
+	int (*init) (void);
+	void (*late_init) (void);
+	void (*pre_exception) (void);
+	void (*post_exception) (void);
+};
+
+extern struct kgdb_io kgdb_io_ops;
+extern struct kgdb_arch arch_kgdb_ops;
+extern int kgdb_initialized;
+
+extern int kgdb_register_io_module(struct kgdb_io *local_kgdb_io_ops);
+extern void kgdb_unregister_io_module(struct kgdb_io *local_kgdb_io_ops);
+
+extern void __init kgdb8250_add_port(int i, struct uart_port *serial_req);
+extern void __init kgdb8250_add_platform_port(int i, struct plat_serial8250_port *serial_req);
+
+extern int kgdb_hex2long(char **ptr, long *long_val);
+extern char *kgdb_mem2hex(char *mem, char *buf, int count);
+extern char *kgdb_hex2mem(char *buf, char *mem, int count);
+extern int kgdb_get_mem(char *addr, unsigned char *buf, int count);
+extern int kgdb_set_mem(char *addr, unsigned char *buf, int count);
+
+int kgdb_isremovedbreak(unsigned long addr);
+int kgdb_skipexception(int exception, struct pt_regs *regs);
+
+extern int kgdb_handle_exception(int ex_vector, int signo, int err_code,
+				struct pt_regs *regs);
+extern void kgdb_nmihook(int cpu, void *regs);
+extern int debugger_step;
+extern atomic_t debugger_active;
+#else
+/* Stubs for when KGDB is not set. */
+static const atomic_t debugger_active = ATOMIC_INIT(0);
+#endif				/* CONFIG_KGDB */
+#endif				/* _KGDB_H_ */
+#endif				/* __KERNEL__ */
Index: linux-2.6.15.5/kernel/Makefile
===================================================================
--- linux-2.6.15.5.orig/kernel/Makefile
+++ linux-2.6.15.5/kernel/Makefile
@@ -26,6 +26,7 @@ obj-$(CONFIG_STOP_MACHINE) += stop_machi
 obj-$(CONFIG_AUDIT) += audit.o
 obj-$(CONFIG_AUDITSYSCALL) += auditsc.o
 obj-$(CONFIG_KPROBES) += kprobes.o
+obj-$(CONFIG_KGDB) += kgdb.o
 obj-$(CONFIG_SYSFS) += ksysfs.o
 obj-$(CONFIG_DETECT_SOFTLOCKUP) += softlockup.o
 obj-$(CONFIG_GENERIC_HARDIRQS) += irq/
Index: linux-2.6.15.5/kernel/kgdb.c
===================================================================
--- /dev/null
+++ linux-2.6.15.5/kernel/kgdb.c
@@ -0,0 +1,1959 @@
+/*
+ * kernel/kgdb.c
+ *
+ * Maintainer: Tom Rini <[e-mail]>
+ *
+ * Copyright (C) 2000-2001 VERITAS Software Corporation.
+ * Copyright (C) 2002-2004 Timesys Corporation
+ * Copyright (C) 2003-2004 Amit S. Kale <[e-mail]>
+ * Copyright (C) 2004 Pavel Machek <[e-mail]>
+ * Copyright (C) 2004-2005 Tom Rini <[e-mail]>
+ * Copyright (C) 2004-2006 LinSysSoft Technologies Pvt. Ltd.
+ * Copyright (C) 2005 Wind River Systems, Inc.
+ *
+ * Contributors at various stages not listed above:
+ *  Jason Wessel ( [e-mail] )
+ *  George Anzinger <[e-mail]>
+ *  Anurekh Saxena ([e-mail])
+ *  Lake Stevens Instrument Division (Glenn Engel)
+ *  Jim Kingdon, Cygnus Support.
+ *
+ * Original KGDB stub: David Grothe <[e-mail]>,
+ * Tigran Aivazian <[e-mail]>
+ *
+ * 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.
+ */
+
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/sched.h>
+#include <linux/smp.h>
+#include <linux/spinlock.h>
+#include <linux/delay.h>
+#include <linux/mm.h>
+#include <linux/threads.h>
+#include <linux/reboot.h>
+#include <asm/system.h>
+#include <asm/ptrace.h>
+#include <asm/uaccess.h>
+#include <linux/kgdb.h>
+#include <asm/atomic.h>
+#include <linux/notifier.h>
+#include <linux/module.h>
+#include <asm/cacheflush.h>
+#include <linux/init.h>
+#include <linux/sysrq.h>
+#include <linux/console.h>
+#include <asm/byteorder.h>
+
+extern int pid_max;
+extern int pidhash_init_done;
+
+/* How many times to count all of the waiting CPUs */
+#define ROUNDUP_WAIT		640000	/* Arbitrary, increase if needed. */
+#define BUF_THREAD_ID_SIZE	16
+
+/*
+ * kgdb_initialized with a value of 1 indicates that kgdb is setup and is
+ * all ready to serve breakpoints and other kernel exceptions.  A value of
+ * -1 indicates that we have tried to initialize early, and need to try
+ * again later.
+ */
+int kgdb_initialized;
+/* Is a host GDB connected to us? */
+int kgdb_connected;
+/* Could we be about to try and access a bad memory location? If so we
+ * also need to flag this has happend. */
+int kgdb_may_fault;
+/* All the KGDB handlers are installed */
+int kgdb_from_module_registered = 0;
+
+/* We provide a kgdb_io_ops structure that may be overriden. */
+struct kgdb_io __attribute__ ((weak)) kgdb_io_ops;
+
+static struct kgdb_io kgdb_io_ops_prev[MAX_KGDB_IO_HANDLERS];
+static int kgdb_io_handler_cnt = 0;
+
+/* Export the following symbols for use with kernel modules */
+EXPORT_SYMBOL(kgdb_io_ops);
+EXPORT_SYMBOL(kgdb_tasklet_breakpoint);
+EXPORT_SYMBOL(kgdb_connected);
+EXPORT_SYMBOL(kgdb_register_io_module);
+EXPORT_SYMBOL(kgdb_unregister_io_module);
+EXPORT_SYMBOL(debugger_active);
+
+/*
+ * Holds information about breakpoints in a kernel. These breakpoints are
+ * added and removed by gdb.
+ */
+struct kgdb_bkpt kgdb_break[MAX_BREAKPOINTS];
+
+struct kgdb_arch *kgdb_ops = &arch_kgdb_ops;
+
+static const char hexchars[] = "0123456789abcdef";
+
+static spinlock_t slavecpulocks[NR_CPUS];
+static atomic_t procindebug[NR_CPUS];
+atomic_t kgdb_setting_breakpoint;
+EXPORT_SYMBOL(kgdb_setting_breakpoint);
+struct task_struct *kgdb_usethread, *kgdb_contthread;
+
+int debugger_step;
+atomic_t debugger_active;
+
+/* Our I/O buffers. */
+static char remcom_in_buffer[BUFMAX];
+static char remcom_out_buffer[BUFMAX];
+/* Storage for the registers, in GDB format. */
+static unsigned long gdb_regs[(NUMREGBYTES + sizeof(unsigned long) - 1) /
+			      sizeof(unsigned long)];
+/* Storage of registers for handling a fault. */
+unsigned long kgdb_fault_jmp_regs[NUMCRITREGBYTES / sizeof(unsigned long)]
+ JMP_REGS_ALIGNMENT;
+static int kgdb_notify_reboot(struct notifier_block *this,
+				unsigned long code ,void *x);
+struct debuggerinfo_struct {
+	void *debuggerinfo;
+	struct task_struct *task;
+} kgdb_info[NR_CPUS];
+
+/* to keep track of the CPU which is doing the single stepping*/
+atomic_t cpu_doing_single_step = ATOMIC_INIT(-1);
+
+/* reboot notifier block */
+static struct notifier_block kgdb_reboot_notifier = {
+	.notifier_call  = kgdb_notify_reboot,
+	.next           = NULL,
+	.priority       = INT_MAX,
+};
+
+/**
+ *	kgdb_arch_init - Perform any architecture specific initalization.
+ *
+ *	RETURN:
+ *	The return value is ignored.
+ *
+ *	This function will handle the initalization of any architecture
+ *	specific hooks.
+ */
+int __attribute__ ((weak))
+    kgdb_arch_init(void)
+{
+	return 0;
+}
+
+/**
+ *	kgdb_disable_hw_debug - Disable hardware debugging while we in kgdb.
+ *	@regs: Current &struct pt_regs.
+ *
+ *	This function will be called if the particular architecture must
+ *	disable hardware debugging while it is processing gdb packets or
+ *	handling exception.
+ */
+void __attribute__ ((weak))
+    kgdb_disable_hw_debug(struct pt_regs *regs)
+{
+}
+
+/*
+ * Skip an int3 exception when it occurs after a breakpoint has been
+ * removed. Backtrack eip by 1 since the int3 would have caused it to
+ * increment by 1.
+ */
+int __attribute__ ((weak))
+	kgdb_skipexception(int exception, struct pt_regs *regs)
+{
+	return 0;
+}
+
+/**
+ *	kgdb_set_hw_break - Set a hardware breakpoint at @addr.
+ *	@addr: The address to set a hardware breakpoint at.
+ */
+int __attribute__ ((weak))
+    kgdb_set_hw_break(unsigned long addr)
+{
+	return 0;
+}
+
+/**
+ *	kgdb_remove_hw_break - Remove a hardware breakpoint at @addr.
+ *	@addr: The address to remove a hardware breakpoint from.
+ */
+int __attribute__ ((weak))
+    kgdb_remove_hw_break(unsigned long addr)
+{
+	return 0;
+}
+
+/**
+ *	kgdb_remove_all_hw_break - Clear all hardware breakpoints.
+ */
+void __attribute__ ((weak))
+    kgdb_remove_all_hw_break(void)
+{
+}
+
+/**
+ *	kgdb_correct_hw_break - Correct hardware breakpoints.
+ *
+ *	A hook to allow for changes to the hardware breakpoint, called
+ *	after a single step (s) or continue (c) packet, and once we're about
+ *	to let the kernel continue running.
+ *
+ *	This is used to set the hardware breakpoint registers for all the
+ *	slave cpus on an SMP configuration. This must be called after any
+ *	changes are made to the hardware breakpoints (such as by a single
+ *	step (s) or continue (c) packet. This is only required on
+ *	architectures that support SMP and every processor has its own set
+ *	of breakpoint registers.
+ */
+void __attribute__ ((weak))
+    kgdb_correct_hw_break(void)
+{
+}
+
+/**
+ *	kgdb_post_master_code - Save error vector/code numbers.
+ *	@regs: Original pt_regs.
+ *	@e_vector: Original error vector.
+ *	@err_code: Original error code.
+ *
+ *	This is needed on architectures which support SMP and KGDB.
+ *	This function is called after all the slave cpus have been put
+ *	to a know spin state and the master CPU has control over KGDB.
+ */
+
+void __attribute__ ((weak))
+    kgdb_post_master_code(struct pt_regs *regs, int e_vector, int err_code)
+{
+}
+
+/**
+ * 	kgdb_roundup_cpus - Get other CPUs into a holding pattern
+ * 	@flags: Current IRQ state
+ *
+ * 	On SMP systems, we need to get the attention of the other CPUs
+ * 	and get them be in a known state.  This should do what is needed
+ * 	to get the other CPUs to call kgdb_wait(). Note that on some arches,
+ *	the NMI approach is not used for rounding up all the CPUs. For example,
+ *	in case of MIPS, smp_call_function() is used to roundup CPUs. In
+ *	this case, we have to make sure that interrupts are enabled before
+ *	calling smp_call_function(). The argument to this function is
+ *	the flags that will be used when restoring the interrupts. There is
+ *	local_irq_save() call before kgdb_roundup_cpus().
+ */
+void __attribute__ ((weak))
+    kgdb_roundup_cpus(unsigned long flags)
+{
+}
+
+/**
+ *	kgdb_shadowinfo - Get shadowed information on @threadid.
+ *	@regs: The &struct pt_regs of the current process.
+ *	@buffer: A buffer of %BUFMAX size.
+ *	@threadid: The thread id of the shadowed process to get information on.
+ */
+void __attribute__ ((weak))
+    kgdb_shadowinfo(struct pt_regs *regs, char *buffer, unsigned threadid)
+{
+}
+
+/**
+ *	kgdb_get_shadow_thread - Get the shadowed &task_struct of @threadid.
+ *	@regs: The &struct pt_regs of the current thread.
+ *	@threadid: The thread id of the shadowed process to get information on.
+ *
+ *	RETURN:
+ *	This returns a pointer to the &struct task_struct of the shadowed
+ *	thread, @threadid.
+ */
+struct task_struct __attribute__ ((weak))
+    * kgdb_get_shadow_thread(struct pt_regs *regs, int threadid)
+{
+	return NULL;
+}
+
+/**
+ *	kgdb_shadow_regs - Return the shadowed registers of @threadid.
+ *	@regs: The &struct pt_regs of the current thread.
+ *	@threadid: The thread id we want the &struct pt_regs for.
+ *
+ *	RETURN:
+ *	The a pointer to the &struct pt_regs of the shadowed thread @threadid.
+ */
+struct pt_regs __attribute__ ((weak))
+    * kgdb_shadow_regs(struct pt_regs *regs, int threadid)
+{
+	return NULL;
+}
+
+int __attribute__ ((weak))
+     kgdb_validate_break_address(unsigned long addr)
+{
+	int error = 0;