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/* main header file
* Copyright (C) 2005 Red Hat Inc.
*
* 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_
/** @file runtime.h
* @brief Main include file for runtime functions.
*/
#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>
#ifdef DEBUG
/** Prints debug line.
* This function prints a debug message immediately to stpd.
* If the last character is not a newline, then one is added.
* @param args A variable number of args in a format like printf.
* @ingroup io
*/
static void _stp_dbug (char *func, int line, const char *fmt, ...);
#define dbug(args...) _stp_dbug(__FUNCTION__, __LINE__, args)
#define kbug(args...) {printk("%s:%d ",__FUNCTION__, __LINE__); printk(args); }
#else
#define dbug(args...) ;
#define kbug(args...) ;
#endif /* DEBUG */
/* atomic globals */
static atomic_t _stp_transport_failures = ATOMIC_INIT (0);
#ifdef STP_RELAYFS
static struct
{
atomic_t ____cacheline_aligned_in_smp seq;
} _stp_seq = { ATOMIC_INIT (0) };
#define _stp_seq_inc() (atomic_inc_return(&_stp_seq.seq))
#endif /* RELAYFS */
#include "print.c"
#include "string.c"
#include "arith.c"
#include "copy.c"
#include "sym.h"
/************* Module Stuff ********************/
static int (*_stp_kta)(unsigned long addr);
static const char * (*_stp_kallsyms_lookup)(unsigned long addr,
unsigned long *symbolsize,
unsigned long *offset,
char **modname, char *namebuf);
/* TEST_MODE is always defined by systemtap */
#ifdef TEST_MODE
#define SYSTEMTAP 1
#endif
#ifdef SYSTEMTAP
/* This implementation is used if stap_[num_]symbols are available. */
static const char * _stp_kallsyms_lookup_tabled (unsigned long addr,
unsigned long *symbolsize,
unsigned long *offset,
char **modname,
char *namebuf)
{
unsigned begin = 0;
unsigned end = stap_num_symbols;
/*const*/ struct stap_symbol* s;
/* binary search on index [begin,end) */
do
{
unsigned mid = (begin + end) / 2;
if (addr < stap_symbols[mid].addr)
end = mid;
else
begin = mid;
} while (begin + 1 < end);
/* result index in $begin, guaranteed between [0,stap_num_symbols) */
s = & stap_symbols [begin];
if (addr < s->addr)
return NULL;
else
{
if (offset) *offset = addr - s->addr;
if (modname) *modname = (char *) s->modname;
if (symbolsize)
{
if ((begin + 1) < stap_num_symbols)
*symbolsize = stap_symbols[begin+1].addr - s->addr;
else
*symbolsize = 0;
// NB: This is only a heuristic. Sometimes there are large
// gaps between text areas of modules.
}
if (namebuf)
{
strlcpy (namebuf, s->symbol, KSYM_NAME_LEN+1);
return namebuf;
}
else
return s->symbol;
}
}
#endif
int init_module (void)
{
_stp_kta = (int (*)(unsigned long))kallsyms_lookup_name("__kernel_text_address");
#ifdef SYSTEMTAP
if (stap_num_symbols > 0)
_stp_kallsyms_lookup = & _stp_kallsyms_lookup_tabled;
else
#endif
_stp_kallsyms_lookup = (const char * (*)(unsigned long,unsigned long *,unsigned long *,char **,char *))
kallsyms_lookup_name("kallsyms_lookup");
return _stp_transport_init();
}
int probe_start(void);
void cleanup_module(void)
{
_stp_transport_close();
}
MODULE_LICENSE("GPL");
#endif /* _RUNTIME_H_ */
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