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74fe6c29fb
vendor/processor-trace/24982c1a6fce48f1e416461d42899805f74fbb26 Sponsored by: DARPA, AFRL
89 lines
2.5 KiB
C
89 lines
2.5 KiB
C
/*
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* Copyright (c) 2013-2018, Intel Corporation
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* * Neither the name of Intel Corporation nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "pt_tnt_cache.h"
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#include "intel-pt.h"
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void pt_tnt_cache_init(struct pt_tnt_cache *cache)
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{
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if (!cache)
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return;
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cache->tnt = 0ull;
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cache->index = 0ull;
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}
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int pt_tnt_cache_is_empty(const struct pt_tnt_cache *cache)
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{
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if (!cache)
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return -pte_invalid;
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return cache->index == 0;
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}
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int pt_tnt_cache_query(struct pt_tnt_cache *cache)
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{
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int taken;
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if (!cache)
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return -pte_invalid;
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if (!cache->index)
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return -pte_bad_query;
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taken = (cache->tnt & cache->index) != 0;
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cache->index >>= 1;
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return taken;
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}
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int pt_tnt_cache_update_tnt(struct pt_tnt_cache *cache,
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const struct pt_packet_tnt *packet,
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const struct pt_config *config)
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{
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uint8_t bit_size;
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(void) config;
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if (!cache || !packet)
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return -pte_invalid;
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if (cache->index)
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return -pte_bad_context;
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bit_size = packet->bit_size;
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if (!bit_size)
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return -pte_bad_packet;
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cache->tnt = packet->payload;
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cache->index = 1ull << (bit_size - 1);
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return 0;
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}
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