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gtp_older_to_2.6.19.patch
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Index: linux/include/linux/kprobes.h
===================================================================
--- linux.orig/include/linux/kprobes.h 2014-04-05 05:52:28.211711307 +0800
+++ linux/include/linux/kprobes.h 2014-04-05 05:52:30.091730701 +0800
@@ -1,5 +1,8 @@
#ifndef _LINUX_KPROBES_H
#define _LINUX_KPROBES_H
+
+#define KGTP_API_VERSION 20120917
+
/*
* Kernel Probes (KProbes)
* include/linux/kprobes.h
Index: linux/lib/Kconfig.debug
===================================================================
--- linux.orig/lib/Kconfig.debug 2014-04-05 05:52:28.511733243 +0800
+++ linux/lib/Kconfig.debug 2014-04-05 05:52:30.091730701 +0800
@@ -311,6 +311,16 @@
If unsure, say N.
+config GTP
+ tristate "GDB tracepoint support"
+ depends on X86 || ARM || MIPS
+ select KPROBES
+ select DEBUG_FS
+ ---help---
+ Supply GDB tracepoint interface in /sys/kernel/debug/gtp.
+ See Documentation/trace/gtp.txt or
+ https://code.google.com/p/kgtp/wiki/HOWTO for more info.
+
config DEBUG_VM
bool "Debug VM"
depends on DEBUG_KERNEL
Index: linux/lib/Makefile
===================================================================
--- linux.orig/lib/Makefile 2014-04-05 05:52:28.511733243 +0800
+++ linux/lib/Makefile 2014-04-05 05:52:30.091730701 +0800
@@ -55,6 +55,8 @@
obj-$(CONFIG_SWIOTLB) += swiotlb.o
+obj-$(CONFIG_GTP) += gtp.o
+
hostprogs-y := gen_crc32table
clean-files := crc32table.h
Index: linux/lib/gtp.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux/lib/gtp.c 2014-04-05 05:52:30.191636133 +0800
@@ -0,0 +1,13524 @@
+/*
+ * Kernel GDB tracepoint module.
+ *
+ * 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 of the License, 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Copyright(C) KGTP team (https://code.google.com/p/kgtp/), 2010-2013
+ *
+ */
+
+/* If "* 10" means that this is not a release version. */
+#define GTP_VERSION (20140510)
+
+#include <linux/version.h>
+#ifndef RHEL_RELEASE_VERSION
+#define RHEL_RELEASE_VERSION(a,b) (((a) << 8) + (b))
+#define RHEL_RELEASE_CODE 0
+#endif
+
+/* Sepcial config ------------------------------------------------ */
+#define GTP_RB
+
+#ifdef GTP_FRAME_SIMPLE
+/* This is a debug option.
+ This define is for simple frame alloc record, then we can get how many
+ memory are weste by FRAME_ALIGN. */
+/* #define FRAME_ALLOC_RECORD */
+#undef GTP_RB
+#endif
+
+#ifdef GTP_FTRACE_RING_BUFFER
+#undef GTP_RB
+#endif
+
+/* If define USE_PROC, KGTP will use ProcFS instead DebugFS. */
+#ifndef GTP_NO_AUTO_BUILD
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,11))
+#define USE_PROC
+#endif
+#endif
+#ifndef USE_PROC
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,11))
+#warning If got some build error about debugfs, you can use "USE_PROC=1" handle it.
+#endif
+#endif
+
+#ifdef GTP_FTRACE_RING_BUFFER
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,30))
+#warning If got some build error about ring buffer, you can use "FRAME_SIMPLE=1" handle it.
+#endif
+#endif
+
+/* If define GTP_CLOCK_CYCLE, $clock will return rdtscll. */
+#ifndef GTP_NO_AUTO_BUILD
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24))
+#define GTP_CLOCK_CYCLE
+#endif
+#endif
+#ifndef GTP_CLOCK_CYCLE
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24))
+#warning If got some build error about cpu_clock or local_clock, you can use "CLOCK_CYCLE=1" handle it.
+#endif
+#endif
+
+#ifdef CONFIG_LOCKDEP
+#warning Current kernel open the runtime locking correctness validator (CONFIG_LOCKDEP) that will make KGTP trace functions about locks get deadlock. Please DO NOT trace function about locks.
+#endif
+
+#ifdef GTP_FTRACE_RING_BUFFER
+#ifndef CONFIG_RING_BUFFER
+#define CONFIG_RING_BUFFER
+#include "ring_buffer.h"
+#include "ring_buffer.c"
+#define GTP_SELF_RING_BUFFER
+#warning Use the ring buffer inside KGTP.
+#endif
+#endif
+/* Sepcial config ------------------------------------------------ */
+
+#include <linux/kernel.h>
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,14,0))
+#undef MODULE
+#include <linux/preempt.h>
+#define MODULE
+#endif
+#include <linux/module.h>
+#include <linux/uaccess.h>
+#include <linux/vmalloc.h>
+#include <linux/poll.h>
+#include <linux/kprobes.h>
+#include <linux/interrupt.h>
+#include <linux/proc_fs.h>
+#include <linux/debugfs.h>
+#include <linux/highmem.h>
+#include <linux/pagemap.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/ctype.h>
+#include <asm/atomic.h>
+#ifdef CONFIG_X86
+#include <asm/debugreg.h>
+#endif
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22))
+#include <linux/kdebug.h>
+#else
+#include <asm/kdebug.h>
+#endif
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,0,0))
+#include <linux/hw_breakpoint.h>
+#endif
+#include "gtp.h"
+
+#ifdef GTP_FTRACE_RING_BUFFER
+#ifndef GTP_SELF_RING_BUFFER
+#include <linux/ring_buffer.h>
+#endif
+#endif
+#ifdef CONFIG_PERF_EVENTS
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,33)) \
+ && (RHEL_RELEASE_CODE < RHEL_RELEASE_VERSION(6,1))
+#warning "Current Kernel is too old. Function of performance counters is not available."
+#else
+#include <linux/perf_event.h>
+#define GTP_PERF_EVENTS
+#endif
+#else
+#warning "Current Kernel doesn't open CONFIG_PERF_EVENTS. Function of performance counters is not available."
+#endif
+
+/* Handle KGTP_API_VERSION for the special kernel that include KGTP_API. */
+#ifdef KGTP_API_VERSION
+#define KGTP_API_VERSION_LOCAL KGTP_API_VERSION
+#else
+#define KGTP_API_VERSION_LOCAL 0
+#endif
+
+#ifndef __percpu
+#define __percpu
+#endif
+
+#ifndef this_cpu_ptr
+#define this_cpu_ptr(v) per_cpu_ptr(v, smp_processor_id())
+#endif
+
+#define KERN_NULL
+
+/* check ---------------------------------------------------------- */
+#ifndef CONFIG_KPROBES
+#warning "Cannot trace Linux kernel because Linux Kernel config doesn't open KPROBES. Please open it in 'General setup->Kprobes' if you need it."
+#endif
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,9,0))
+#ifndef CONFIG_UPROBES
+#warning "Cannot trace user program because Linux Kernel config doesn't open UPROBES. Please open it in 'Kernel hacking->Tracers->Enable uprobes-based dynamic events' if you need it."
+#endif
+#else
+#warning "Cannot trace user program because the Linux Kernel that older than 3.9 doesn't support UPROBES."
+#endif
+
+#ifdef USE_PROC
+#ifndef CONFIG_PROC_FS
+#error "Linux Kernel doesn't support procfs."
+#endif
+#else
+#ifndef CONFIG_DEBUG_FS
+#error "Linux Kernel doesn't support debugfs."
+#endif
+#endif
+
+#if !defined CONFIG_X86 && !defined CONFIG_MIPS && !defined CONFIG_ARM
+#error "KGTP support X86_32, X86_64, MIPS and ARM."
+#endif
+/* ---------------------------------------------------------------- */
+
+/* Following part is to support old Linux kernel ------------------ */
+#ifndef DEFINE_SEMAPHORE
+#define DEFINE_SEMAPHORE(name) DECLARE_MUTEX(name)
+#endif
+
+#ifndef list_first_entry
+#define list_first_entry(ptr, type, member) \
+ list_entry((ptr)->next, type, member)
+#endif
+
+/* ---------------------------------------------------------------- */
+
+#ifdef GTPDEBUG
+#define GTP_DEBUG KERN_WARNING
+#endif
+
+/* #define GTP_DEBUG_V */
+
+#define GTP_RW_MAX 16384
+#define GTP_RW_BUFP_MAX (GTP_RW_MAX - 4 - gtp_rw_size)
+
+#define FID_TYPE unsigned int
+#define FID_SIZE sizeof(FID_TYPE)
+#define FID(x) (*((FID_TYPE *)x))
+enum {
+ FID_HEAD = 0,
+ FID_REG,
+ FID_MEM,
+ FID_VAR,
+ FID_END,
+ FID_PAGE_BEGIN,
+ FID_PAGE_END,
+};
+
+/* GTP_FRAME_SIZE must align with FRAME_ALIGN_SIZE if use GTP_FRAME_SIMPLE. */
+#define GTP_FRAME_SIZE 5242880
+#if defined(GTP_FRAME_SIMPLE) || defined(GTP_RB)
+#define FRAME_ALIGN_SIZE sizeof(unsigned int)
+#define FRAME_ALIGN(x) ((x + FRAME_ALIGN_SIZE - 1) \
+ & (~(FRAME_ALIGN_SIZE - 1)))
+#endif
+#ifdef GTP_FRAME_SIMPLE
+#define GTP_FRAME_HEAD_SIZE (FID_SIZE + sizeof(char *) + sizeof(ULONGEST))
+#define GTP_FRAME_REG_SIZE (FID_SIZE + sizeof(char *) \
+ + sizeof(struct pt_regs))
+#define GTP_FRAME_MEM_SIZE (FID_SIZE + sizeof(char *) \
+ + sizeof(struct gtp_frame_mem))
+#define GTP_FRAME_VAR_SIZE (FID_SIZE + sizeof(char *) \
+ + sizeof(struct gtp_frame_var))
+#endif
+#ifdef GTP_RB
+/* The frame head size: FID_HEAD + count id + frame number + pointer to prev frem */
+#define GTP_FRAME_HEAD_SIZE (FID_SIZE + sizeof(u64) + sizeof(ULONGEST) + sizeof(void *))
+/* The frame head size: FID_PAGE_BEGIN + count id */
+#define GTP_FRAME_PAGE_BEGIN_SIZE (FID_SIZE + sizeof(u64))
+#endif
+#ifdef GTP_FTRACE_RING_BUFFER
+#define GTP_FRAME_HEAD_SIZE (FID_SIZE + sizeof(ULONGEST))
+#endif
+#if defined(GTP_FTRACE_RING_BUFFER) || defined(GTP_RB)
+#define GTP_FRAME_REG_SIZE (FID_SIZE + sizeof(struct pt_regs))
+#define GTP_FRAME_MEM_SIZE (FID_SIZE + sizeof(struct gtp_frame_mem))
+#define GTP_FRAME_VAR_SIZE (FID_SIZE + sizeof(struct gtp_frame_var))
+#endif
+
+#define INT2CHAR(h) ((h) > 9 ? (h) + 'a' - 10 : (h) + '0')
+
+enum {
+ op_check_add = 0xe0,
+ op_check_sub,
+ op_check_mul,
+ op_check_div_signed,
+ op_check_div_unsigned,
+ op_check_rem_signed,
+ op_check_rem_unsigned,
+ op_check_lsh,
+ op_check_rsh_signed,
+ op_check_rsh_unsigned,
+ op_check_trace,
+ op_check_bit_and,
+ op_check_bit_or,
+ op_check_bit_xor,
+ op_check_equal,
+ op_check_less_signed,
+ op_check_less_unsigned,
+ op_check_pop,
+ op_check_swap,
+ op_check_if_goto,
+ op_check_printf, /* XXX: still not used. */
+
+ op_trace_printk = 0xfd,
+ op_trace_quick_printk,
+ op_tracev_printk,
+};
+
+struct action_agent_exp {
+ unsigned int size;
+ uint8_t *buf;
+ int need_var_lock;
+};
+
+struct action_m {
+ int regnum;
+ CORE_ADDR offset;
+ size_t size;
+};
+
+struct action {
+ struct list_head node;
+ unsigned char type;
+ union {
+ ULONGEST reg_mask;
+ struct action_agent_exp exp;
+ struct action_m m;
+ } u;
+};
+
+struct gtpsrc {
+ struct gtpsrc *next;
+ char *src;
+};
+
+enum gtp_stop_type {
+ gtp_stop_normal = 0,
+ gtp_stop_frame_full,
+ gtp_stop_efault,
+ gtp_stop_access_wrong_reg,
+ gtp_stop_agent_expr_code_error,
+ gtp_stop_agent_expr_stack_overflow,
+};
+
+/* See $current. */
+#define GTP_ENTRY_FLAGS_CURRENT_TASK 1
+/* This gtp entry is registered inside the system. */
+#define GTP_ENTRY_FLAGS_REG 2
+/* See $no_self_trace. */
+#define GTP_ENTRY_FLAGS_SELF_TRACE 4
+/* This gtp entry has passcount. */
+#define GTP_ENTRY_FLAGS_HAVE_PASS 8
+/* See $printk_level. */
+#define GTP_ENTRY_FLAGS_HAVE_PRINTK 16
+/* See $kret. */
+#define GTP_ENTRY_FLAGS_IS_KRETPROBE 32
+
+enum gtp_entry_type {
+ /* Kernel tracepoint that use kprobes.
+ When the gtp_entry is alloced by function gtp_list_add, all
+ of gtp_entry will set to this type. */
+ gtp_entry_kprobe = 0,
+
+ /* User space program tracepoint that use uprobes.
+ When KGTP try to register the gtp_entry, when gtp_entry->pid
+ is not same with gtpd_task->pid (the pid of Kernel), this
+ gtp_entry will set to this type. */
+ gtp_entry_uprobe,
+
+ /* Watch tracepoint.
+ When tracepoint action is checked by function gtp_check_setv.
+ gtp_entry will be set to there types. */
+ gtp_entry_watch_static,
+ gtp_entry_watch_dynamic,
+};
+
+#define GTP_IS_WATCH(tpe) ((tpe)->type == gtp_entry_watch_static \
+ || (tpe)->type == gtp_entry_watch_dynamic)
+
+enum gtp_watch_type {
+ gtp_watch_exec = 0,
+ gtp_watch_write = 1,
+ gtp_watch_read_write = 2,
+};
+
+struct gtp_entry {
+ union gtp_entry_u {
+#ifdef CONFIG_KPROBES
+ /* For gtp_entry_kprobe. */
+ struct gtp_kp {
+ struct kretprobe kpret;
+ struct tasklet_struct stop_tasklet;
+ struct work_struct stop_work;
+ } kp;
+#endif
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,9,0)) && defined CONFIG_UPROBES
+ /* For gtp_entry_uprobe. */
+ struct gtp_up {
+ struct inode *inode;
+ loff_t offset;
+ struct uprobe_consumer uc;
+ } up;
+#endif
+
+ /* For gtp_entry_watch_static and gtp_entry_watch_dynamic. */
+ struct {
+ int type;
+ int size;
+ } watch;
+ } u;
+ unsigned long flags;
+ enum gtp_entry_type type;
+ ULONGEST num;
+ ULONGEST addr;
+
+ /* The actions that set $current help tracepoint get right regs. */
+ struct action *get_regs;
+ /* The actions for the condition. */
+ struct action *cond;
+ struct list_head action_list;
+ int step;
+ struct list_head step_action_list;
+
+ atomic_t current_pass;
+ struct gtpsrc *printk_str;
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,30))
+ /* This is to enable and disable an tracepoint. */
+ struct tasklet_struct enable_tasklet;
+ struct work_struct enable_work;
+ struct tasklet_struct disable_tasklet;
+ struct work_struct disable_work;
+#endif
+ enum gtp_stop_type reason;
+
+ struct gtp_entry *next;
+
+ /* Pid for this tracepoint.
+ KGTP will use this pid to select Kprobe or Uprobe.
+ And use this pid to get the inode for Uprobe if need.
+ In default, this pid will bet set to gtp_current_pid. */
+ pid_t pid;
+
+ int disable;
+ ULONGEST pass;
+ struct gtpsrc *src;
+ /* Sometime, it will not same with action
+ because action will be deleted. */
+ struct gtpsrc *action_cmd;
+};
+
+struct gtp_frame_mem {
+ CORE_ADDR addr;
+ size_t size;
+};
+
+struct gtp_frame_var {
+ unsigned int num;
+ int64_t val;
+};
+
+struct gtpro_entry {
+ struct gtpro_entry *next;
+ CORE_ADDR start;
+ CORE_ADDR end;
+};
+
+static pid_t gtp_gtp_pid;
+static unsigned int gtp_gtp_pid_count;
+static pid_t gtp_gtpframe_pid;
+static unsigned int gtp_gtpframe_pid_count;
+#if defined(GTP_FTRACE_RING_BUFFER) || defined(GTP_RB)
+static pid_t gtp_gtpframe_pipe_pid;
+#endif
+
+static struct gtp_entry *gtp_list;
+static struct gtp_entry *current_gtp;
+static struct gtpsrc *current_gtp_action_cmd;
+static struct gtpsrc *current_gtp_src;
+
+static struct workqueue_struct *gtp_wq;
+
+static int gtp_read_ack;
+static char *gtp_rw_buf;
+static char *gtp_rw_bufp;
+static size_t gtp_rw_size;
+
+static int gtp_start;
+
+static int gtp_disconnected_tracing;
+static int gtp_circular;
+#if defined(GTP_FTRACE_RING_BUFFER) \
+ && (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,39)) \
+ && !defined(GTP_SELF_RING_BUFFER)
+static int gtp_circular_is_changed;
+#endif
+
+static int gtp_cpu_number;
+
+/* Current number in the frame. */
+static int gtp_frame_current_num;
+/* Current tracepoint id. */
+static ULONGEST gtp_frame_current_tpe;
+static atomic_t gtp_frame_create;
+static char *gtp_frame_file;
+static size_t gtp_frame_file_size;
+static DECLARE_WAIT_QUEUE_HEAD(gtpframe_wq);
+#ifdef GTP_FRAME_SIMPLE
+static DEFINE_SPINLOCK(gtp_frame_lock);
+static char *gtp_frame;
+static char *gtp_frame_r_start;
+static char *gtp_frame_w_start;
+static char *gtp_frame_end;
+static int gtp_frame_is_circular;
+static char *gtp_frame_current;
+#endif
+#ifdef GTP_FTRACE_RING_BUFFER
+static struct ring_buffer *gtp_frame;
+static struct ring_buffer_iter *gtp_frame_iter[NR_CPUS];
+static int gtp_frame_current_cpu;
+static u64 gtp_frame_current_clock;
+#endif
+
+#if defined(GTP_FTRACE_RING_BUFFER) || defined(GTP_RB)
+static DECLARE_WAIT_QUEUE_HEAD(gtpframe_pipe_wq);
+static atomic_t gtpframe_pipe_wq_v;
+static struct tasklet_struct gtpframe_pipe_wq_tasklet;
+#endif
+
+static struct gtpro_entry *gtpro_list;
+
+#define GTP_PRINTF_MAX 256
+static DEFINE_PER_CPU(char[GTP_PRINTF_MAX], gtp_printf);
+
+#ifdef CONFIG_X86
+static DEFINE_PER_CPU(u64, rdtsc_current);
+static DEFINE_PER_CPU(u64, rdtsc_offset);
+#endif
+static DEFINE_PER_CPU(u64, local_clock_current);
+static DEFINE_PER_CPU(u64, local_clock_offset);
+
+static uint64_t gtp_start_last_errno;
+static int gtp_start_ignore_error;
+
+static int gtp_pipe_trace;
+
+static int gtp_bt_size;
+
+static int gtp_noack_mode;
+
+static pid_t gtp_current_pid;
+
+/* gtpd_task->pid is used as the pid of Linux kernel. */
+static struct task_struct *gtpd_task;
+
+#ifdef CONFIG_X86
+/* Following part is for while-stepping. */
+struct gtp_step_s {
+ spinlock_t lock;
+ int step;
+ int irq_need_open;
+ struct gtp_entry *tpe;
+};
+static DEFINE_PER_CPU(struct gtp_step_s, gtp_step);
+#endif
+
+#ifdef CONFIG_X86
+static int gtp_have_watch_tracepoint;
+static int gtp_have_step;
+#endif
+
+#ifdef CONFIG_X86
+/* Following part is for watch tracepoint. */
+/* This part is X86 special. */
+#define HWB_NUM 4
+
+static unsigned long gtp_hwb_drx[HWB_NUM];
+static unsigned long gtp_hwb_dr7;
+
+#define GTP_HWB_DR7_DEF (0x400UL)
+#define GTP_HWB_DR6_MASK (0xe00fUL)
+
+/* This part is for all the arch. */
+struct gtp_hwb_s {
+ struct list_head node;
+
+ /* This is the number of this hardware breakpoint. */
+ int num;
+
+ /* This is the address, size and type of this
+ hardware breakpoint. */
+ CORE_ADDR addr;
+ int size;
+ int type;
+
+ /* The previous of the address that this watch tracepoint
+ watch on. */
+ int64_t prev_val;
+
+ /* This is the num and address that setup this hardware
+ breakpoints.
+ For the static watch, this is the num and address of this
+ tracepoint.
+ For the dynamic watch, this is the num and address of
+ the tracepoint that call $watch_start. */
+ ULONGEST trace_num;
+ ULONGEST trace_addr;
+
+ unsigned int count;
+
+ /* Point to the watchpoint struct.
+ If NULL, this hardware breakpoint is not used. */
+ struct gtp_entry *watch;
+};
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,0,0))
+static struct hw_breakpoint {
+ int num;
+ struct perf_event * __percpu *pev;
+} breakinfo[HWB_NUM];
+#endif
+
+static struct gtp_hwb_s gtp_hwb[HWB_NUM];
+
+static LIST_HEAD(gtp_hwb_used_list);
+static LIST_HEAD(gtp_hwb_unused_list);
+
+static DEFINE_RWLOCK(gtp_hwb_lock);
+
+static unsigned int gtp_hwb_sync_count;
+static DEFINE_PER_CPU(unsigned int, gtp_hwb_sync_count_local);
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27))
+static DEFINE_PER_CPU(struct cpumask, gtp_hwb_sync_cpu_mask);
+#endif
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,25))
+#define gtp_get_debugreg(val, reg) get_debugreg(val, reg)
+#define gtp_set_debugreg(val, reg) set_debugreg(val, reg)
+#else
+#define gtp_get_debugreg(val, reg) \
+ do { \
+ switch(reg) { \
+ case 0: \
+ get_debugreg(val, 0); \
+ break; \
+ case 1: \
+ get_debugreg(val, 1); \
+ break; \
+ case 2: \
+ get_debugreg(val, 2); \
+ break; \
+ case 3: \
+ get_debugreg(val, 3); \
+ break; \
+ } \
+ } while (0)
+
+static void
+gtp_set_debugreg(unsigned long val, int reg)
+{
+ switch(reg) {
+ case 0:
+ gtp_set_debugreg(val, 0);
+ break;
+ case 1:
+ gtp_set_debugreg(val, 1);
+ break;
+ case 2:
+ gtp_set_debugreg(val, 2);
+ break;
+ case 3:
+ gtp_set_debugreg(val, 3);
+ break;
+ }
+}
+#endif
+
+static void
+gtp_hwb_stop(void *data)
+{
+ read_lock(>p_hwb_lock);
+ __get_cpu_var(gtp_hwb_sync_count_local) = gtp_hwb_sync_count;
+ gtp_set_debugreg(0UL, 0);
+ gtp_set_debugreg(0UL, 1);
+ gtp_set_debugreg(0UL, 2);
+ gtp_set_debugreg(0UL, 3);
+ gtp_set_debugreg(GTP_HWB_DR7_DEF, 7);
+ read_unlock(>p_hwb_lock);
+}
+
+static void
+gtp_hwb_sync_local(void)
+{
+ __get_cpu_var(gtp_hwb_sync_count_local) = gtp_hwb_sync_count;
+ gtp_set_debugreg(gtp_hwb_drx[0], 0);
+ gtp_set_debugreg(gtp_hwb_drx[1], 1);
+ gtp_set_debugreg(gtp_hwb_drx[2], 2);
+ gtp_set_debugreg(gtp_hwb_drx[3], 3);
+ gtp_set_debugreg(gtp_hwb_dr7, 7);
+}
+
+static void
+gtp_hwb_sync(void *data)
+{
+ gtp_hwb_sync_local();
+}
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27))
+static int
+gtp_ipi_handler(struct kprobe *p, struct pt_regs *regs)
+{
+ read_lock(>p_hwb_lock);
+
+ if (__get_cpu_var(gtp_hwb_sync_count_local) != gtp_hwb_sync_count)
+ gtp_hwb_sync_local();
+
+ read_unlock(>p_hwb_lock);
+
+ return 0;
+}
+#endif
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27))
+static struct kprobe gtp_ipi_kp;
+#endif
+#endif
+
+static char *
+string2hex(char *pkg, char *out)
+{
+ char *ret = out;
+
+ while (pkg[0]) {
+ sprintf(out, "%02x", pkg[0]);
+ pkg++;
+ out += 2;
+ }
+ out[0] = '\0';
+
+ return ret;
+}
+
+/* Strdup begin. If end is not NULL, it point to the end of this dup. */
+
+static char *
+gtp_strdup(char *begin, char *end)
+{
+ int len;
+ char *ret;
+
+ if (end)
+ len = end - begin;
+ else
+ len = strlen(begin);
+
+ ret = kmalloc(len + 1, GFP_KERNEL);
+ if (ret == NULL)
+ return NULL;
+
+ strncpy(ret, begin, len);
+ ret[len] = '\0';
+
+ return ret;
+}
+
+/* Following part is for GTP_LOCAL_CLOCK. */
+
+#define GTP_LOCAL_CLOCK gtp_local_clock()
+#ifdef GTP_CLOCK_CYCLE
+static unsigned long long
+gtp_local_clock(void)
+{
+#ifdef CONFIG_X86
+ unsigned long long a;
+ rdtscll(a);
+ return a;
+#else
+#error "This ARCH cannot get cycle."
+#endif
+}
+#else
+static unsigned long long
+gtp_local_clock(void)
+{
+#ifdef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK
+ unsigned long flags;
+ unsigned int cpu;
+
+ local_irq_save(flags);
+ cpu = smp_processor_id();
+ local_irq_restore(flags);
+
+ return cpu_clock(cpu);
+#else
+ return cpu_clock(0);
+#endif /* CONFIG_HAVE_UNSTABLE_SCHED_CLOCK */
+}
+#endif
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,26))
+static long
+probe_kernel_read(void *dst, void *src, size_t size)
+{
+ long ret;
+ mm_segment_t old_fs = get_fs();
+
+ set_fs(KERNEL_DS);
+
+ /* pagefault_disable();*/
+ inc_preempt_count();
+ barrier();
+
+ ret = __copy_from_user_inatomic(dst,
+ (__force const void __user *)src, size);
+
+ /* pagefault_enable(); */
+ barrier();
+ dec_preempt_count();
+ barrier();
+ preempt_check_resched();
+
+ set_fs(old_fs);
+
+ return ret ? -EFAULT : 0;
+}
+#endif
+
+#ifdef GTP_RB
+#include "gtp_rb.c"
+#endif
+
+/* Following part is for TSV. */
+
+/* getgtprsp.pl need the ID of TSV. */
+
+enum {
+ GTP_VAR_VERSION_ID = 1,
+ GTP_VAR_CPU_ID = 2,
+ GTP_VAR_CURRENT_TASK_ID = 3,
+ GTP_VAR_CURRENT_THREAD_INFO_ID = 4,
+ GTP_VAR_CLOCK_ID = 5,
+ GTP_VAR_COOKED_CLOCK_ID = 6,
+#ifdef CONFIG_X86
+ GTP_VAR_RDTSC_ID = 7,
+ GTP_VAR_COOKED_RDTSC_ID = 8,
+#endif
+#ifdef GTP_RB
+ GTP_VAR_GTP_RB_DISCARD_PAGE_NUMBER = 9,
+#endif
+ GTP_VAR_PRINTK_TMP_ID = 10,
+ GTP_VAR_PRINTK_LEVEL_ID = 11,
+ GTP_VAR_PRINTK_FORMAT_ID = 12,
+ GTP_VAR_DUMP_STACK_ID = 13,
+ GTP_VAR_SELF_TRACE_ID = 14,
+ GTP_VAR_CPU_NUMBER_ID = 15,
+ GTP_VAR_PC_PE_EN_ID = 16,
+ GTP_VAR_KRET_ID = 17,
+ GTP_VAR_XTIME_SEC_ID = 18,
+ GTP_VAR_XTIME_NSEC_ID = 19,
+ GTP_VAR_IGNORE_ERROR_ID = 20,
+ GTP_VAR_LAST_ERRNO_ID = 21,
+ GTP_VAR_HARDIRQ_COUNT_ID = 22,
+ GTP_VAR_SOFTIRQ_COUNT_ID = 23,
+ GTP_VAR_IRQ_COUNT_ID = 24,
+ GTP_VAR_PIPE_TRACE_ID = 25,
+ GTP_VAR_CURRENT_TASK_PID_ID = 26,
+ GTP_VAR_CURRENT_TASK_USER_ID = 27,
+ GTP_VAR_CURRENT_ID = 28,
+ GTP_VAR_BT_ID = 29,
+
+ GTP_VAR_ENABLE_ID = 30,
+ GTP_VAR_DISABLE_ID = 31,
+
+ GTP_WATCH_STATIC_ID = 32,
+ GTP_WATCH_TYPE_ID = 33,
+ GTP_WATCH_SIZE_ID = 34,
+ GTP_WATCH_SET_ID_ID = 35,
+ GTP_WATCH_SET_ADDR_ID = 36,
+ GTP_WATCH_START_ID = 37,
+ GTP_WATCH_STOP_ID = 38,
+ GTP_WATCH_TRACE_NUM_ID = 39,
+ GTP_WATCH_TRACE_ADDR_ID = 40,
+ GTP_WATCH_ADDR_ID = 41,
+ GTP_WATCH_VAL_ID = 42,
+ GTP_WATCH_PREV_VAL_ID = 46,
+ GTP_WATCH_COUNT_ID = 43,
+
+ GTP_STEP_COUNT_ID = 44,
+ GTP_STEP_ID_ID = 45,
+
+ GTP_INFERIOR_PID_ID = 47,
+
+ GTP_TASK_PT_REGS_ID = 48,
+
+ GTP_VAR_SPECIAL_MIN = GTP_VAR_VERSION_ID,
+ GTP_VAR_SPECIAL_MAX = GTP_TASK_PT_REGS_ID,
+};
+
+enum pe_tv_id {
+ pe_tv_unknown = 0,
+ pe_tv_cpu,
+ pe_tv_type,
+ pe_tv_config,
+ pe_tv_en,
+ pe_tv_val,
+ pe_tv_enabled,
+ pe_tv_running,
+};
+
+enum {
+ gtp_var_normal = 0,
+#ifdef GTP_PERF_EVENTS
+ gtp_var_perf_event,
+ gtp_var_perf_event_per_cpu,
+#endif
+ gtp_var_per_cpu,
+ gtp_var_special,
+};
+
+struct gtp_var;
+
+#ifdef GTP_PERF_EVENTS
+struct gtp_var_perf_event {
+ struct gtp_var_perf_event *pc_next;
+ int en;
+ struct perf_event *event;
+ int cpu;
+ u64 val;
+ u64 enabled; /* The perf inside timer */
+ u64 running; /* The perf inside timer */
+ char *name;
+ struct perf_event_attr attr;
+};
+
+struct gtp_var_pe {
+ enum pe_tv_id ptid;
+ struct gtp_var_perf_event *pe;
+};
+#endif
+
+struct gtp_var_per_cpu {
+ union {
+ int64_t val;
+#ifdef GTP_PERF_EVENTS
+ struct gtp_var_pe pe;
+#endif
+ } u;
+};
+
+struct gtp_var_pc {
+ int cpu;
+ struct gtp_var_per_cpu __percpu *pc;
+};
+
+struct gtp_var {
+ struct list_head node;
+ unsigned int type;
+ unsigned int num;
+ int64_t initial_val;
+ char *src;
+ union {
+ int64_t val;
+ struct gtp_var_pc pc;
+#ifdef GTP_PERF_EVENTS
+ struct gtp_var_pe pe;
+#endif
+ struct gtp_var_hooks *hooks;
+ } u;
+};
+
+#define gtp_var_get_pc(var) ((struct gtp_var_per_cpu *)((var)->u.pc.cpu < 0 ? \
+ this_cpu_ptr(var->u.pc.pc) \
+ : per_cpu_ptr((var)->u.pc.pc, (var)->u.pc.cpu)))
+#ifdef GTP_PERF_EVENTS
+#define gtp_var_get_pc_pe(var) (&(gtp_var_get_pc(var)->u.pe))