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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/interp.h>
#include <nw/io.h>
#include <nw/log.h>
#include <nw/ops.h>
#include <nw/routines.h>
#include <nw/stack.h>
static enum nw_state push(struct nw_interp *const i)
{
struct nw_i_sm_cm *const cm = &i->sm.cm;
const enum nw_state n = nwp_stack_push(i, &cm->io);
if (n)
return n;
nwp_interp_resume(i);
return NW_AGAIN;
}
static enum nw_state get_reserved(struct nw_interp *const i)
{
nw_varuint1 reserved;
struct nw_i_sm_cm *const cm = &i->sm.cm;
const struct nw_io_cfg *const cfg = &i->cfg.io;
const enum nw_state n = nwp_varuint1(cfg, &cm->leb128, &reserved, cfg->user);
if (n)
return n;
else if (reserved)
{
static const char *const exc = "invalid reserved value";
i->exception = exc;
#ifdef NW_LOG
nwp_log("%s: %#x\n", exc, (unsigned)reserved);
#endif
return NW_FATAL;
}
else
{
struct nw_sm_io io = {0};
nw_varuint32 *const np = &i->linear.n_pages;
io.buf = np;
io.n = sizeof *np;
cm->io = io;
}
i->next = push;
return NW_AGAIN;
}
void nwp_op_current_memory(struct nw_interp *const i)
{
static const struct nw_i_sm_cm cm;
struct nw_i_sm_cm *const pcm = &i->sm.cm;
*pcm = cm;
i->next = get_reserved;
}
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