/*
 * Copyright (C) 2017, Emilio G. Cota <cota@braap.org>
 *
 * License: GNU GPL, version 2 or later.
 *   See the COPYING file in the top-level directory.
 *
 * plugin-gen.h - TCG-dependent definitions for generating plugin code
 *
 * This header should be included only from plugin.c and C files that emit
 * TCG code.
 */
#ifndef QEMU_PLUGIN_GEN_H
#define QEMU_PLUGIN_GEN_H

#include "qemu/plugin.h"
#include "tcg/tcg.h"

struct DisasContextBase;

#ifdef CONFIG_PLUGIN

bool plugin_gen_tb_start(CPUState *cpu, const struct DisasContextBase *db,
                         bool supress);
void plugin_gen_tb_end(CPUState *cpu);
void plugin_gen_insn_start(CPUState *cpu, const struct DisasContextBase *db);
void plugin_gen_insn_end(void);

void plugin_gen_disable_mem_helpers(void);
void plugin_gen_empty_mem_callback(TCGv addr, uint32_t info);

static inline void plugin_insn_append(abi_ptr pc, const void *from, size_t size)
{
    struct qemu_plugin_insn *insn = tcg_ctx->plugin_insn;
    abi_ptr off;

    if (insn == NULL) {
        return;
    }
    off = pc - insn->vaddr;
    if (off < insn->data->len) {
        g_byte_array_set_size(insn->data, off);
    } else if (off > insn->data->len) {
        /* we have an unexpected gap */
        g_assert_not_reached();
    }

    insn->data = g_byte_array_append(insn->data, from, size);
}

#else /* !CONFIG_PLUGIN */

static inline bool
plugin_gen_tb_start(CPUState *cpu, const struct DisasContextBase *db, bool sup)
{
    return false;
}

static inline
void plugin_gen_insn_start(CPUState *cpu, const struct DisasContextBase *db)
{ }

static inline void plugin_gen_insn_end(void)
{ }

static inline void plugin_gen_tb_end(CPUState *cpu)
{ }

static inline void plugin_gen_disable_mem_helpers(void)
{ }

static inline void plugin_gen_empty_mem_callback(TCGv addr, uint32_t info)
{ }

static inline void plugin_insn_append(abi_ptr pc, const void *from, size_t size)
{ }

#endif /* CONFIG_PLUGIN */

#endif /* QEMU_PLUGIN_GEN_H */