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#ifndef _CURRENT_C_
#define _CURRENT_C_
/* -*- linux-c -*- */
/** @file current.c
* @brief Functions to get the current state.
*/
/** @addtogroup current Current State
* Functions to get the current state.
* @{
*/
/** Get the current return address.
* Call from kprobes (not jprobes).
* @param regs The pt_regs saved by the kprobe.
* @return The return address saved in esp or rsp.
* @note i386 and x86_64 only so far.
*/
unsigned long _stp_ret_addr (struct pt_regs *regs)
{
#ifdef __x86_64__
unsigned long *ra = (unsigned long *)regs->rsp;
#else
unsigned long *ra = (unsigned long *)regs->esp;
#endif
if (ra)
return *ra;
else
return 0;
}
/** @} */
#endif /* _CURRENT_C_ */
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