src/op/check/call.c


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/*
 * nanowasm, a tiny WebAssembly/Wasm interpreter
 * Copyright (C) 2023-2025  Xavier Del Campo Romero
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at https://mozilla.org/MPL/2.0/.
 */

#include <nanowasm/nw.h>
#include <nw/io.h>
#include <nw/log.h>
#include <nw/ops.h>

static enum nw_state get_index(struct nw_mod *const m)
{
    nw_varuint32 index;
    const struct nw_io_cfg *const cfg = &m->cfg.io;
    struct nw_sm_c *const c = &m->sm.code;
    struct nw_sm_leb128 *const l = &c->leb128;
    const enum nw_state n = nwp_varuint32(cfg, l, &index, cfg->user);

    if (n)
        return n;
    else if (index >= c->count + m->cfg.n_imports)
    {
#ifdef NW_LOG
        nwp_log("invalid function index %lu\n", (unsigned long)index);
#endif
        return NW_FATAL;
    }

    m->next = m->sm.code.next;
    return NW_AGAIN;
}

void nwp_op_check_call(struct nw_mod *const m)
{
    m->next = get_index;
}