50 lines
1.3 KiB
C
50 lines
1.3 KiB
C
/*
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* Copyright (C) 2017, Emilio G. Cota <cota@braap.org>
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*
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* License: GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#ifndef EXEC_TB_LOOKUP_H
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#define EXEC_TB_LOOKUP_H
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#ifdef NEED_CPU_H
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#include "cpu.h"
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#else
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#include "exec/poison.h"
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#endif
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#include "exec/exec-all.h"
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#include "tb-hash.h"
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/* Might cause an exception, so have a longjmp destination ready */
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static inline TranslationBlock *tb_lookup(CPUState *cpu, target_ulong pc,
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target_ulong cs_base,
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uint32_t flags, uint32_t cflags)
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{
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TranslationBlock *tb;
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uint32_t hash;
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/* we should never be trying to look up an INVALID tb */
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tcg_debug_assert(!(cflags & CF_INVALID));
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hash = tb_jmp_cache_hash_func(pc);
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tb = qatomic_rcu_read(&cpu->tb_jmp_cache[hash]);
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if (likely(tb &&
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tb->pc == pc &&
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tb->cs_base == cs_base &&
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tb->flags == flags &&
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tb->trace_vcpu_dstate == *cpu->trace_dstate &&
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tb_cflags(tb) == cflags)) {
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return tb;
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}
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tb = tb_htable_lookup(cpu, pc, cs_base, flags, cflags);
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if (tb == NULL) {
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return NULL;
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}
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qatomic_set(&cpu->tb_jmp_cache[hash], tb);
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return tb;
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}
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#endif /* EXEC_TB_LOOKUP_H */
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