src/interp/stack_push.c


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/*
 * nanowasm, a tiny WebAssembly/Wasm interpreter
 * Copyright (C) 2023-2024  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/interp.h>
#include <nw/log.h>
#include <stddef.h>
#include <string.h>

int nwp_interp_stack_push(struct nw_interp *const i, const void *const src,
    const size_t n)
{
    const size_t max = i->cfg.stack.n;
    void *const dst = nwp_interp_stackptr(i);

    if (max < n || i->stack_i > max - n)
    {
        static const char exc[] = "stack overflow";

        LOG("%s: %s\n", __func__, exc);
        i->exception = exc;
        return -1;
    }

    memcpy(dst, src, n);
    i->stack_i += n;
    return 0;
}