/*
 * wnix, a Unix-like operating system for WebAssembly applications.
 * Copyright (C) 2025  Xavier Del Campo Romero
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

#include <bin/proc.h>
#include <bin/types.h>
#include <kprintf.h>
#include <stddef.h>
#include <string.h>

int bin_proc_g_store(const unsigned long pos, const void *const src,
    const size_t n, void *const user)
{
    struct bin_proc *const p = user;
    struct bin_global *const g = &p->global;

    if (n > g->sz || pos > g->sz - n)
    {
        kprintf("%s: out-of-bounds access to global memory\n", p->path);
        return -1;
    }

    memcpy((char *)g->buf + pos, src, n);
    return n;
}
