| /* |
| * Copyright (c) 2013-2018, Intel Corporation |
| * |
| * 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. |
| */ |
| |
| #include "pt_last_ip.h" |
| |
| #include "intel-pt.h" |
| |
| |
| void pt_last_ip_init(struct pt_last_ip *last_ip) |
| { |
| if (!last_ip) |
| return; |
| |
| last_ip->ip = 0ull; |
| last_ip->have_ip = 0; |
| last_ip->suppressed = 0; |
| } |
| |
| int pt_last_ip_query(uint64_t *ip, const struct pt_last_ip *last_ip) |
| { |
| if (!last_ip) |
| return -pte_internal; |
| |
| if (!last_ip->have_ip) { |
| if (ip) |
| *ip = 0ull; |
| return -pte_noip; |
| } |
| |
| if (last_ip->suppressed) { |
| if (ip) |
| *ip = 0ull; |
| return -pte_ip_suppressed; |
| } |
| |
| if (ip) |
| *ip = last_ip->ip; |
| |
| return 0; |
| } |
| |
| /* Sign-extend a uint64_t value. */ |
| static uint64_t sext(uint64_t val, uint8_t sign) |
| { |
| uint64_t signbit, mask; |
| |
| signbit = 1ull << (sign - 1); |
| mask = ~0ull << sign; |
| |
| return val & signbit ? val | mask : val & ~mask; |
| } |
| |
| int pt_last_ip_update_ip(struct pt_last_ip *last_ip, |
| const struct pt_packet_ip *packet, |
| const struct pt_config *config) |
| { |
| (void) config; |
| |
| if (!last_ip || !packet) |
| return -pte_internal; |
| |
| switch (packet->ipc) { |
| case pt_ipc_suppressed: |
| last_ip->suppressed = 1; |
| return 0; |
| |
| case pt_ipc_sext_48: |
| last_ip->ip = sext(packet->ip, 48); |
| last_ip->have_ip = 1; |
| last_ip->suppressed = 0; |
| return 0; |
| |
| case pt_ipc_update_16: |
| last_ip->ip = (last_ip->ip & ~0xffffull) |
| | (packet->ip & 0xffffull); |
| last_ip->have_ip = 1; |
| last_ip->suppressed = 0; |
| return 0; |
| |
| case pt_ipc_update_32: |
| last_ip->ip = (last_ip->ip & ~0xffffffffull) |
| | (packet->ip & 0xffffffffull); |
| last_ip->have_ip = 1; |
| last_ip->suppressed = 0; |
| return 0; |
| |
| case pt_ipc_update_48: |
| last_ip->ip = (last_ip->ip & ~0xffffffffffffull) |
| | (packet->ip & 0xffffffffffffull); |
| last_ip->have_ip = 1; |
| last_ip->suppressed = 0; |
| return 0; |
| |
| case pt_ipc_full: |
| last_ip->ip = packet->ip; |
| last_ip->have_ip = 1; |
| last_ip->suppressed = 0; |
| return 0; |
| } |
| |
| return -pte_bad_packet; |
| } |