52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
/*
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* Helper functions for guest memory tracing
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*
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* Copyright (C) 2016 Lluís Vilanova <vilanova@ac.upc.edu>
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*
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* This work is licensed under the terms of the 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 TRACE__MEM_H
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#define TRACE__MEM_H
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#include "exec/memopidx.h"
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#define TRACE_MEM_SZ_SHIFT_MASK 0xf /* size shift mask */
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#define TRACE_MEM_SE (1ULL << 4) /* sign extended (y/n) */
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#define TRACE_MEM_BE (1ULL << 5) /* big endian (y/n) */
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#define TRACE_MEM_ST (1ULL << 6) /* store (y/n) */
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#define TRACE_MEM_MMU_SHIFT 8 /* mmu idx */
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/**
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* trace_mem_get_info:
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*
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* Return a value for the 'info' argument in guest memory access traces.
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*/
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static inline uint16_t trace_mem_get_info(MemOpIdx oi, bool store)
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{
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MemOp op = get_memop(oi);
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uint32_t size_shift = op & MO_SIZE;
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bool sign_extend = op & MO_SIGN;
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bool big_endian = (op & MO_BSWAP) == MO_BE;
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uint16_t res;
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res = size_shift & TRACE_MEM_SZ_SHIFT_MASK;
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if (sign_extend) {
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res |= TRACE_MEM_SE;
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}
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if (big_endian) {
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res |= TRACE_MEM_BE;
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}
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if (store) {
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res |= TRACE_MEM_ST;
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}
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#ifdef CONFIG_SOFTMMU
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res |= get_mmuidx(oi) << TRACE_MEM_MMU_SHIFT;
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#endif
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return res;
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}
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#endif /* TRACE__MEM_H */
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