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/*
* Copyright (c) 2013-2025, Intel Corporation
* SPDX-License-Identifier: BSD-3-Clause
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of Intel Corporation nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef PT_LAST_IP_H
#define PT_LAST_IP_H
#include <stdint.h>
struct pt_packet_ip;
struct pt_config;
/* Keeping track of the last-ip in Intel PT packets. */
struct pt_last_ip {
/* The last IP. */
uint64_t ip;
/* Flags governing the handling of IP updates and queries:
*
* - we have seen an IP update.
*/
uint32_t have_ip:1;
/* - the IP has been suppressed in the last update. */
uint32_t suppressed:1;
};
/* Initialize (or reset) the last-ip. */
extern void pt_last_ip_init(struct pt_last_ip *last_ip);
/* Query the last-ip.
*
* If @ip is not NULL, provides the last-ip in @ip on success.
*
* Returns zero on success.
* Returns -pte_internal if @last_ip is NULL.
* Returns -pte_noip if there is no last-ip.
* Returns -pte_ip_suppressed if the last-ip has been suppressed.
*/
extern int pt_last_ip_query(uint64_t *ip, const struct pt_last_ip *last_ip);
/* Update last-ip.
*
* Updates @last_ip based on @packet and, if non-null, @config.
*
* Returns zero on success.
* Returns -pte_internal if @last_ip or @packet is NULL.
* Returns -pte_bad_packet if @packet appears to be corrupted.
*/
extern int pt_last_ip_update_ip(struct pt_last_ip *last_ip,
const struct pt_packet_ip *packet,
const struct pt_config *config);
#endif /* PT_LAST_IP_H */
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