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/* main header file
* Copyright (C) 2005-2008 Red Hat Inc.
* Copyright (C) 2005, 2006 Intel Corporation.
*
* This file is part of systemtap, and is free software. You can
* redistribute it and/or modify it under the terms of the GNU General
* Public License (GPL); either version 2, or (at your option) any
* later version.
*/
#ifndef _RUNTIME_H_
#define _RUNTIME_H_
#include <linux/module.h>
#include <linux/ctype.h>
#include <linux/kernel.h>
#include <linux/miscdevice.h>
#include <linux/init.h>
#include <linux/hash.h>
#include <linux/string.h>
#include <linux/kprobes.h>
#include <linux/proc_fs.h>
#include <linux/vmalloc.h>
#include <linux/time.h>
#include <linux/spinlock.h>
#include <linux/hardirq.h>
#include <asm/uaccess.h>
#include <linux/kallsyms.h>
#include <linux/version.h>
#include <linux/compat.h>
#include <linux/sched.h>
#include <linux/mm.h>
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,15)
#if !defined (CONFIG_DEBUG_FS) && !defined (CONFIG_DEBUG_FS_MODULE)
#error "DebugFS is required and was not found in the kernel."
#endif
#ifdef CONFIG_RING_BUFFER
#define STP_TRANSPORT_VERSION 3
#else
#define STP_TRANSPORT_VERSION 2
#endif
#else
/* older kernels have no debugfs and older version of relayfs. */
#define STP_TRANSPORT_VERSION 1
#endif
#ifndef stp_for_each_cpu
#define stp_for_each_cpu(cpu) for_each_cpu_mask((cpu), cpu_possible_map)
#endif
#ifndef clamp
#define clamp(val, low, high) min(max(low, val), high)
#endif
#ifndef clamp_t
#define clamp_t(type, val, low, high) min_t(type, max_t(type, low, val), high)
#endif
static void _stp_dbug (const char *func, int line, const char *fmt, ...) __attribute__ ((format (printf, 3, 4)));
static void _stp_error (const char *fmt, ...) __attribute__ ((format (printf, 1, 2)));
static void _stp_warn (const char *fmt, ...) __attribute__ ((format (printf, 1, 2)));
static void _stp_exit(void);
/* unprivileged user support */
#ifdef STAPCONF_TASK_UID
#define STP_CURRENT_EUID (current->euid)
#else
#define STP_CURRENT_EUID (task_euid(current))
#endif
#define is_myproc() (STP_CURRENT_EUID == _stp_uid)
#ifndef STP_PRIVILEGED
#define assert_is_myproc() do { \
if (! is_myproc()) { \
snprintf (CONTEXT->error_buffer, MAXSTRINGLEN, "semi-privileged tapset function called without is_myproc checking for pid %d (euid %d)", \
current->tgid, STP_CURRENT_EUID); \
CONTEXT->last_error = CONTEXT->error_buffer; \
goto out; \
} } while (0)
#else
#define assert_is_myproc() do {} while (0)
#endif
#include "debug.h"
/* atomic globals */
static atomic_t _stp_transport_failures = ATOMIC_INIT (0);
static struct
{
atomic_t ____cacheline_aligned_in_smp seq;
} _stp_seq = { ATOMIC_INIT (0) };
#define _stp_seq_inc() (atomic_inc_return(&_stp_seq.seq))
#ifndef MAXSTRINGLEN
#define MAXSTRINGLEN 128
#endif
#ifndef MAXTRACE
#define MAXTRACE 20
#endif
/* dwarf unwinder only tested so far on i386 and x86_64. */
#if (defined(__i386__) || defined(__x86_64__))
#ifndef STP_USE_DWARF_UNWINDER
#define STP_USE_DWARF_UNWINDER
#endif
#endif
#ifdef CONFIG_FRAME_POINTER
/* Just because frame pointers are available does not mean we can trust them. */
#ifndef STP_USE_DWARF_UNWINDER
#define STP_USE_FRAME_POINTER
#endif
#endif
#ifndef SYM_VERBOSE_NO
#define SYM_VERBOSE_NO 0
#endif
#ifndef SYM_VERBOSE_FULL
#define SYM_VERBOSE_FULL 1
#endif
#ifndef SYM_VERBOSE_BRIEF
#define SYM_VERBOSE_BRIEF 2
#endif
#include "alloc.c"
#include "print.c"
#include "string.c"
#include "io.c"
#include "arith.c"
#include "copy.c"
#include "regs.c"
#include "regs-ia64.c"
#include "time.c"
#include "task_finder.c"
#include "sym.c"
#ifdef STP_PERFMON
#include "perf.c"
#endif
#include "addr-map.c"
/* Support functions for int64_t module parameters. */
static int param_set_int64_t(const char *val, struct kernel_param *kp)
{
char *endp;
long long ll;
if (!val)
return -EINVAL;
/* simple_strtoll isn't exported... */
if (*val == '-')
ll = -simple_strtoull(val+1, &endp, 0);
else
ll = simple_strtoull(val, &endp, 0);
if ((endp == val) || ((int64_t)ll != ll))
return -EINVAL;
*((int64_t *)kp->arg) = ll;
return 0;
}
static int param_get_int64_t(char *buffer, struct kernel_param *kp)
{
return sprintf(buffer, "%lli", (long long)*((int64_t *)kp->arg));
}
#define param_check_int64_t(name, p) __param_check(name, p, int64_t)
/************* Module Stuff ********************/
int init_module (void)
{
return _stp_transport_init();
}
static int probe_start(void);
void cleanup_module(void)
{
_stp_transport_close();
}
#define pseudo_atomic_cmpxchg(v, old, new) ({\
int ret;\
unsigned long flags;\
local_irq_save(flags);\
ret = atomic_read(v);\
if (likely(ret == old))\
atomic_set(v, new);\
local_irq_restore(flags);\
ret; })
MODULE_LICENSE("GPL");
#endif /* _RUNTIME_H_ */
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