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#ifndef _SYM_C_ /* -*- linux-c -*- */
#define _SYM_C_
#include "string.c"
/** @file sym.c
* @addtogroup sym Symbolic Functions
* Symbolic Lookup Functions
* @{
*/
/** Lookup symbol.
* This simply calls the kernel function kallsyms_lookup().
* That function is not exported, so this workaround is required.
* See the kernel source, kernel/kallsyms.c for more information.
*/
static const char * (*_stp_kallsyms_lookup)(unsigned long addr,
unsigned long *symbolsize,
unsigned long *offset,
char **modname, char *namebuf)=(void *)KALLSYMS_LOOKUP;
/** Print addresses symbolically into a string
* @param address The address to lookup.
* @note Symbolic lookups should not be done within
* a probe because it is too time-consuming. Use at module exit time.
* @note Uses scbuf.
*/
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 (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 trace buffer.
* @param address The address to lookup.
* @note Symbolic lookups should not be done within
* a probe because it is too time-consuming. Use at module exit time.
*/
void _stp_symbol_print (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_printf ("0x%lx : ", address);
if (modname)
_stp_printf ("%s+%#lx/%#lx [%s]", name, offset, size, modname);
else
_stp_printf ("%s+%#lx/%#lx", name, offset, size);
}
/** @} */
#endif /* _SYM_C_ */
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