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/* -*- linux-c -*-
* Symbolic Lookup Functions
* Copyright (C) 2005 Red Hat Inc.
* Copyright (C) 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 _SYM_C_
#define _SYM_C_
#include "string.c"
/** @file sym.c
* @addtogroup sym Symbolic Functions
* Symbolic Lookup Functions
* @{
*/
/** Write addresses symbolically into a String
* @param str String
* @param address The address to lookup.
* @note Symbolic lookups should not normally be done within
* a probe because it is too time-consuming. Use at module exit time.
*/
String _stp_symbol_sprint (String str, unsigned long address)
{
char *modname;
const char *name;
unsigned long offset, size;
char namebuf[KSYM_NAME_LEN+1];
name = _stp_kallsyms_lookup(address, &size, &offset, &modname, namebuf);
_stp_sprintf (str, "0x%lx", address);
if (name) {
if (modname)
_stp_sprintf (str, " : %s+%#lx/%#lx [%s]", name, offset, size, modname);
else
_stp_sprintf (str, " : %s+%#lx/%#lx", name, offset, size);
}
return str;
}
/** Print addresses symbolically to the print buffer.
* @param address The address to lookup.
* @note Symbolic lookups should not normally be done within
* a probe because it is too time-consuming. Use at module exit time.
*/
#define _stp_symbol_print(address) _stp_symbol_sprint(_stp_stdout,address)
/** Write addresses symbolically into a char buffer
* @param str Destination buffer
* @param len Length of destination buffer
* @param address The address to lookup.
* @note Symbolic lookups should not normally be done within
* a probe because it is too time-consuming. Use at module exit time.
*/
const char *_stp_symbol_sprint_basic (char *str, size_t len, unsigned long address)
{
char *modname;
const char *name;
unsigned long offset, size;
char namebuf[KSYM_NAME_LEN+1];
if (len > KSYM_NAME_LEN) {
name = _stp_kallsyms_lookup(address, &size, &offset, &modname, str);
if (!name)
snprintf(str, len, "0x%lx", address);
} else {
name = _stp_kallsyms_lookup(address, &size, &offset, &modname, namebuf);
if (name)
strlcpy(str, namebuf, len);
else
snprintf(str, len, "0x%lx", address);
}
return str;
}
/** @} */
#endif /* _SYM_C_ */
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