Function mem_write

host/sysenv/sysenv.cpp:90–98

}

void mem_write(Stack& stack, i64_t ptr, const void* src, size_t len) {
    MemInst& mem = get_mem(stack, ptr);
    size_t off = (size_t)((uint64_t)ptr & PTR_OFF_MASK);
    size_t end = off + len;
    if(end > mem.data.size()) {
        throw std::out_of_range("sysenv: memory write out of bounds");
    }
    std::memcpy(mem.data.data() + off, src, len);
}

// ---- reg_func helper --------------------------------------------------------