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mkxp-z/binding-sandbox/wasi.cpp

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/*
** wasi.cpp
**
** This file is part of mkxp.
**
** Copyright (C) 2013 - 2021 Amaryllis Kulla <ancurio@mapleshrine.eu>
**
** mkxp is free software: you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation, either version 2 of the License, or
** (at your option) any later version.
**
** mkxp 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 General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with mkxp. If not, see <http://www.gnu.org/licenses/>.
*/
#include <cstring>
#include <algorithm>
#include <random>
#include <sstream>
#include <zip.h>
#include <mkxp-retro-ruby.h>
#include "filesystem.h"
#include "core.h"
#include "wasi.h"
extern const uint8_t mkxp_retro_dist_zip[];
extern const size_t mkxp_retro_dist_zip_len;
namespace mkxp_retro {
retro_log_printf_t log_printf;
retro_video_refresh_t video_refresh;
retro_audio_sample_batch_t audio_sample_batch;
retro_environment_t environment;
retro_input_poll_t input_poll;
retro_input_state_t input_state;
struct retro_perf_callback perf;
}
//#define WASI_DEBUG(...) mkxp_retro::log_printf(RETRO_LOG_INFO, __VA_ARGS__)
#define WASI_DEBUG(...)
#define WASM_MEM(address) ((void *)&wasi->ruby->w2c_memory.data[address])
static inline size_t strlen_safe(const char *str, size_t max_length) {
const char *ptr = (const char *)std::memchr(str, 0, max_length);
return ptr == NULL ? max_length : ptr - str;
}
std::string *wasi_file_entry::dir_handle() {
return (std::string *)handle;
}
struct FileSystem::File *wasi_file_entry::file_handle() {
return (struct FileSystem::File *)handle;
}
struct wasi_zip_handle *wasi_file_entry::zip_handle() {
return (wasi_zip_handle *)handle;
}
struct wasi_zip_dir_handle *wasi_file_entry::zip_dir_handle() {
return (wasi_zip_dir_handle *)handle;
}
struct wasi_zip_file_handle *wasi_file_entry::zip_file_handle() {
return (wasi_zip_file_handle *)handle;
}
static std::vector<path_cache_entry_t> compute_path_cache(zip_t *zip) {
if (zip == NULL) {
return std::vector<path_cache_entry_t>();
}
std::vector<path_cache_entry_t> path_cache;
zip_int64_t num_entries = zip_get_num_entries(zip, 0);
for (zip_int64_t i = 0; i < num_entries; ++i) {
std::string name(zip_get_name(zip, i, 0));
if (!name.empty() && name.back() == '/') {
name.pop_back();
}
u32 n_slashes = 0;
for (u32 i = 0; i < name.length(); ++i) {
if (name[i] == '/') {
++n_slashes;
}
}
path_cache.push_back({n_slashes, name});
}
std::sort(path_cache.begin(), path_cache.end());
return path_cache;
}
wasi_zip_container::wasi_zip_container() : source(NULL), zip(NULL), path_cache(compute_path_cache(zip)) {}
wasi_zip_container::wasi_zip_container(const char *path, zip_flags_t flags) : source(NULL), zip(zip_open(path, flags, NULL)), path_cache(compute_path_cache(zip)) {}
wasi_zip_container::wasi_zip_container(const void *buffer, zip_uint64_t length, zip_flags_t flags) : source(zip_source_buffer_create(buffer, length, 0, NULL)), zip(source == NULL ? NULL : zip_open_from_source(source, flags, NULL)), path_cache(compute_path_cache(zip)) {}
wasi_zip_container::~wasi_zip_container() {
if (zip != NULL) {
zip_close(zip);
} else if (source != NULL) {
zip_source_close(source);
}
}
wasi_zip_file_container::wasi_zip_file_container() : file(NULL) {}
wasi_zip_file_container::wasi_zip_file_container(wasi_zip_container &zip, zip_uint64_t index, zip_flags_t flags) : file(zip_fopen_index(zip.zip, index, flags)) {}
wasi_zip_file_container::~wasi_zip_file_container() {
if (file != NULL) {
zip_fclose(file);
}
}
wasi_t::w2c_wasi__snapshot__preview1(std::shared_ptr<struct w2c_ruby> ruby) : ruby(ruby), dist(new wasi_zip_container(mkxp_retro_dist_zip, mkxp_retro_dist_zip_len, ZIP_RDONLY)) {
if (dist->zip == NULL) {
throw SandboxTrapException();
}
// Initialize WASI file descriptor table
fdtable.push_back({.type = wasi_fd_type::STDIN});
fdtable.push_back({.type = wasi_fd_type::STDOUT});
fdtable.push_back({.type = wasi_fd_type::STDERR});
fdtable.push_back({.type = wasi_fd_type::ZIP, .handle = new (struct wasi_zip_handle){.zip = dist, .path = "/mkxp-retro-dist"}});
fdtable.push_back({.type = wasi_fd_type::FS, .handle = new std::string("/mkxp-retro-game")});
}
wasi_t::~w2c_wasi__snapshot__preview1() {
// Close all of the open WASI file descriptors
for (size_t i = fdtable.size(); i > 0;) {
deallocate_file_descriptor(--i);
}
}
// Gets information about a file or directory at a certain path within a zip file.
static struct wasi_zip_stat wasi_zip_stat(zip_t *zip, const char *path, u32 path_len) {
struct wasi_zip_stat info;
zip_stat_t stat;
info.normalized_path = mkxp_retro::fs->normalize(path, false, false);
if (info.normalized_path.length() == 0) {
info.exists = true;
info.filetype = WASI_IFDIR;
info.inode = -1;
info.size = 0;
info.mtime = 0;
return info;
}
if (zip_stat(zip, info.normalized_path.c_str(), 0, &stat) == 0) {
info.exists = true;
info.filetype = WASI_IFREG;
info.inode = stat.index;
info.size = stat.size;
info.mtime = stat.mtime * 1000000000L;
return info;
}
info.normalized_path.push_back('/');
if (zip_stat(zip, info.normalized_path.c_str(), 0, &stat) == 0) {
info.exists = true;
info.filetype = WASI_IFDIR;
info.inode = stat.index;
info.size = stat.size;
info.mtime = stat.mtime * 1000000000L;
return info;
}
info.exists = false;
return info;
}
// Gets information about a file or directory at a certain index within a zip file.
static struct wasi_zip_stat wasi_zip_stat_entry(zip_t *zip, struct wasi_file_entry &entry) {
struct wasi_zip_stat info;
zip_stat_t stat;
switch (entry.type) {
case wasi_fd_type::ZIPDIR:
if (zip_stat_index(zip, entry.zip_dir_handle()->index, 0, &stat) == 0) {
info.exists = true;
info.filetype = WASI_IFDIR;
info.inode = stat.index;
info.size = stat.size;
info.mtime = stat.mtime * 1000000000L;
} else {
info.exists = false;
}
return info;
case wasi_fd_type::ZIPFILE:
if (zip_stat_index(zip, entry.zip_file_handle()->index, 0, &stat) == 0) {
info.exists = true;
info.filetype = WASI_IFREG;
info.inode = stat.index;
info.size = stat.size;
info.mtime = stat.mtime * 1000000000L;
} else {
info.exists = false;
}
return info;
default:
info.exists = false;
return info;
}
}
struct fs_enumerate_data {
wasi_t *wasi;
u32 fd;
usize original_buf;
usize buf;
u32 buf_len;
u64 initial_cookie;
u64 cookie;
usize result;
};
u32 wasi_t::allocate_file_descriptor(enum wasi_fd_type type, void *handle) {
if (vacant_fds.empty()) {
u32 fd = fdtable.size();
fdtable.push_back({.type = type, .handle = handle});
return fd;
} else {
u32 fd = vacant_fds.back();
vacant_fds.pop_back();
return fd;
}
}
void wasi_t::deallocate_file_descriptor(u32 fd) {
if (fdtable[fd].handle != NULL) {
switch (fdtable[fd].type) {
case wasi_fd_type::FS:
case wasi_fd_type::FSDIR:
delete fdtable[fd].dir_handle();
break;
case wasi_fd_type::FSFILE:
delete fdtable[fd].file_handle();
break;
case wasi_fd_type::ZIP:
delete fdtable[fd].zip_handle();
break;
case wasi_fd_type::ZIPDIR:
delete fdtable[fd].zip_dir_handle();
break;
case wasi_fd_type::ZIPFILE:
delete fdtable[fd].zip_file_handle();
break;
default:
break;
}
}
if (!fdtable.empty() && fd == fdtable.size() - 1) {
fdtable.pop_back();
} else {
fdtable[fd] = {.type = wasi_fd_type::VACANT, .handle = NULL};
vacant_fds.push_back(fd);
}
}
extern "C" u32 w2c_wasi__snapshot__preview1_args_get(wasi_t *wasi, usize argv, usize argv_buf) {
WASI_DEBUG("args_get()\n");
return WASI_ESUCCESS;
}
extern "C" u32 w2c_wasi__snapshot__preview1_args_sizes_get(wasi_t *wasi, usize argc, usize argv_buf_size) {
WASI_DEBUG("args_sizes_get(0x%08x, 0x%08x)\n", argc, argv_buf_size);
WASM_SET(u32, argc, 0);
WASM_SET(u32, argv_buf_size, 0);
return WASI_ESUCCESS;
}
extern "C" u32 w2c_wasi__snapshot__preview1_clock_res_get(wasi_t *wasi, u32 id, usize result) {
WASI_DEBUG("clock_res_get(%u)\n", id);
WASM_SET(u64, result, 1000L);
return WASI_ESUCCESS;
}
extern "C" u32 w2c_wasi__snapshot__preview1_clock_time_get(wasi_t *wasi, u32 id, u64 precision, usize result) {
WASI_DEBUG("clock_time_get(%u, %lu)\n", id, precision);
WASM_SET(u64, result, mkxp_retro::perf.get_time_usec != nullptr ? mkxp_retro::perf.get_time_usec() * 1000L : 0);
return WASI_ESUCCESS;
}
extern "C" u32 w2c_wasi__snapshot__preview1_environ_get(wasi_t *wasi, usize env, usize env_buf) {
WASI_DEBUG("environ_get(0x%08x, 0x%08x)\n", env, env_buf);
return WASI_ESUCCESS;
}
extern "C" u32 w2c_wasi__snapshot__preview1_environ_sizes_get(wasi_t *wasi, usize env_size, usize env_buf_size) {
WASI_DEBUG("environ_sizes_get()\n");
WASM_SET(u32, env_size, 0);
WASM_SET(u32, env_buf_size, 0);
return WASI_ESUCCESS;
}
extern "C" u32 w2c_wasi__snapshot__preview1_fd_advise(wasi_t *wasi, u32 fd, u64 offset, u64 len, u32 advice) {
WASI_DEBUG("fd_advise(%u, %lu, %lu, 0x%08x)\n", fd, offset, len, advice);
return WASI_ENOSYS;
}
extern "C" u32 w2c_wasi__snapshot__preview1_fd_close(wasi_t *wasi, u32 fd) {
WASI_DEBUG("fd_close(%u)\n", fd);
if (fd >= wasi->fdtable.size()) {
return WASI_EBADF;
}
switch (wasi->fdtable[fd].type) {
case wasi_fd_type::VACANT:
return WASI_EBADF;
case wasi_fd_type::STDIN:
case wasi_fd_type::STDOUT:
case wasi_fd_type::STDERR:
case wasi_fd_type::FS:
case wasi_fd_type::ZIP:
return WASI_EINVAL;
case wasi_fd_type::FSDIR:
case wasi_fd_type::FSFILE:
case wasi_fd_type::ZIPDIR:
case wasi_fd_type::ZIPFILE:
wasi->deallocate_file_descriptor(fd);
return WASI_ESUCCESS;
}
return WASI_EBADF;
}
extern "C" u32 w2c_wasi__snapshot__preview1_fd_datasync(wasi_t *wasi, u32 fd) {
WASI_DEBUG("fd_datasync(%u)\n", fd);
return WASI_ENOSYS;
}
extern "C" u32 w2c_wasi__snapshot__preview1_fd_fdstat_get(wasi_t *wasi, u32 fd, usize result) {
WASI_DEBUG("fd_fdstat_get(%u)\n", fd);
if (fd >= wasi->fdtable.size()) {
return WASI_EBADF;
}
switch (wasi->fdtable[fd].type) {
case wasi_fd_type::VACANT:
return WASI_EBADF;
case wasi_fd_type::STDIN:
case wasi_fd_type::STDOUT:
case wasi_fd_type::STDERR:
case wasi_fd_type::FSFILE:
case wasi_fd_type::ZIPFILE:
WASM_SET(u8, result, WASI_IFCHR); // fs_filetype
WASM_SET(u16, result + 2, 0); // fs_flags
WASM_SET(u64, result + 8, WASI_FD_READ | WASI_FD_WRITE | WASI_FD_FILESTAT_GET); // fs_rights_base
WASM_SET(u64, result + 16, 0); // fs_rights_inheriting
return WASI_ESUCCESS;
case wasi_fd_type::FS:
case wasi_fd_type::FSDIR:
case wasi_fd_type::ZIP:
case wasi_fd_type::ZIPDIR:
WASM_SET(u8, result, WASI_IFDIR); // fs_filetype
WASM_SET(u16, result + 2, 0); // fs_flags
WASM_SET(u64, result + 8, WASI_PATH_OPEN | WASI_FD_READDIR | WASI_PATH_FILESTAT_GET | WASI_FD_FILESTAT_GET); // fs_rights_base
WASM_SET(u64, result + 16, 0); // fs_rights_inheriting
return WASI_ESUCCESS;
}
return WASI_EBADF;
}
extern "C" u32 w2c_wasi__snapshot__preview1_fd_fdstat_set_flags(wasi_t *wasi, u32 fd, u32 flags) {
WASI_DEBUG("fd_fdstat_set_flags(%u, %u)\n", fd, flags);
if (fd >= wasi->fdtable.size()) {
return WASI_EBADF;
}
switch (wasi->fdtable[fd].type) {
case wasi_fd_type::VACANT:
return WASI_EBADF;
case wasi_fd_type::STDIN:
case wasi_fd_type::STDOUT:
case wasi_fd_type::STDERR:
case wasi_fd_type::FS:
case wasi_fd_type::FSDIR:
case wasi_fd_type::FSFILE:
case wasi_fd_type::ZIP:
case wasi_fd_type::ZIPDIR:
case wasi_fd_type::ZIPFILE:
return WASI_ESUCCESS;
}
return WASI_EBADF;
}
extern "C" u32 w2c_wasi__snapshot__preview1_fd_filestat_get(wasi_t *wasi, u32 fd, usize result) {
WASI_DEBUG("fd_filestat_get(%u)\n", fd);
if (fd >= wasi->fdtable.size()) {
return WASI_EBADF;
}
switch (wasi->fdtable[fd].type) {
case wasi_fd_type::VACANT:
return WASI_EBADF;
case wasi_fd_type::STDIN:
case wasi_fd_type::STDOUT:
case wasi_fd_type::STDERR:
WASM_SET(u64, result, fd); // dev
WASM_SET(u64, result + 8, 0); // ino
WASM_SET(u8, result + 16, WASI_IFCHR); // filetype
WASM_SET(u32, result + 24, 1); // nlink
WASM_SET(u64, result + 32, 0); // size
WASM_SET(u64, result + 40, 0); // atim
WASM_SET(u64, result + 48, 0); // mtim
WASM_SET(u64, result + 56, 0); // ctim
return WASI_ESUCCESS;
case wasi_fd_type::FS:
case wasi_fd_type::FSDIR:
{
PHYSFS_Stat stat;
if (!PHYSFS_stat(wasi->fdtable[fd].dir_handle()->c_str(), &stat)) {
return WASI_ENOENT;
}
if (stat.filetype != PHYSFS_FILETYPE_DIRECTORY) {
return WASI_EIO;
}
WASM_SET(u64, result, fd); // dev
WASM_SET(u64, result + 8, 0); // ino // TODO: generate a pseudorandom inode number
WASM_SET(u8, result + 16, WASI_IFDIR); // filetype
WASM_SET(u32, result + 24, 1); // nlink
WASM_SET(u64, result + 32, stat.filesize); // size
WASM_SET(u64, result + 40, stat.accesstime * 1000000000L); // atim
WASM_SET(u64, result + 48, stat.modtime * 1000000000L); // mtim
WASM_SET(u64, result + 56, stat.createtime * 1000000000L); // ctim
return WASI_ESUCCESS;
}
case wasi_fd_type::FSFILE:
{
PHYSFS_Stat stat;
if (!PHYSFS_stat(wasi->fdtable[fd].file_handle()->path(), &stat)) {
return WASI_ENOENT;
}
if (stat.filetype != PHYSFS_FILETYPE_REGULAR) {
return WASI_EIO;
}
WASM_SET(u64, result, fd); // dev
WASM_SET(u64, result + 8, 0); // ino // TODO: generate a pseudorandom inode number
WASM_SET(u8, result + 16, WASI_IFREG); // filetype
WASM_SET(u32, result + 24, 1); // nlink
WASM_SET(u64, result + 32, stat.filesize); // size
WASM_SET(u64, result + 40, stat.accesstime * 1000000000L); // atim
WASM_SET(u64, result + 48, stat.modtime * 1000000000L); // mtim
WASM_SET(u64, result + 56, stat.createtime * 1000000000L); // ctim
return WASI_ESUCCESS;
}
case wasi_fd_type::ZIP:
{
struct wasi_zip_stat info = wasi_zip_stat(wasi->fdtable[fd].zip_handle()->zip->zip, "", 0);
if (!info.exists) {
return WASI_ENOENT;
}
WASM_SET(u64, result, fd); // dev
WASM_SET(u64, result + 8, info.inode); // ino
WASM_SET(u8, result + 16, info.filetype); // filetype
WASM_SET(u32, result + 24, 1); // nlink
WASM_SET(u64, result + 32, info.size); // size
WASM_SET(u64, result + 40, info.mtime); // atim
WASM_SET(u64, result + 48, info.mtime); // mtim
WASM_SET(u64, result + 56, info.mtime); // ctim
return WASI_ESUCCESS;
}
case wasi_fd_type::ZIPDIR:
case wasi_fd_type::ZIPFILE:
{
u32 parent_fd = wasi->fdtable[fd].type == wasi_fd_type::ZIPDIR
? wasi->fdtable[fd].zip_dir_handle()->parent_fd
: wasi->fdtable[fd].zip_file_handle()->parent_fd;
struct wasi_zip_stat info = wasi_zip_stat_entry(
wasi->fdtable[parent_fd].zip_handle()->zip->zip,
wasi->fdtable[fd]
);
if (!info.exists) {
return WASI_ENOENT;
}
WASM_SET(u64, result, parent_fd); // dev
WASM_SET(u64, result + 8, info.inode); // ino
WASM_SET(u8, result + 16, info.filetype); // filetype
WASM_SET(u32, result + 24, 1); // nlink
WASM_SET(u64, result + 32, info.size); // size
WASM_SET(u64, result + 40, info.mtime); // atim
WASM_SET(u64, result + 48, info.mtime); // mtim
WASM_SET(u64, result + 56, info.mtime); // ctim
return WASI_ESUCCESS;
}
}
return WASI_EBADF;
}
extern "C" u32 w2c_wasi__snapshot__preview1_fd_filestat_set_size(wasi_t *wasi, u32 fd, u64 size) {
WASI_DEBUG("fd_filestat_set_size(%u, %lu)\n", fd, size);
if (fd >= wasi->fdtable.size()) {
return WASI_EBADF;
}
switch (wasi->fdtable[fd].type) {
case wasi_fd_type::STDIN:
case wasi_fd_type::STDOUT:
case wasi_fd_type::STDERR:
return WASI_EINVAL;
default:
return WASI_ENOSYS;
}
return WASI_EBADF;
}
extern "C" u32 w2c_wasi__snapshot__preview1_fd_pread(wasi_t *wasi, u32 fd, usize iovs, u32 iovs_len, u64 offset, usize result) {
WASI_DEBUG("fd_pread(%u, 0x%08x (%u), %lu)\n", fd, iovs, iovs_len, offset);
return WASI_ENOSYS;
}
extern "C" u32 w2c_wasi__snapshot__preview1_fd_prestat_dir_name(wasi_t *wasi, u32 fd, usize path, u32 path_len) {
WASI_DEBUG("fd_prestat_dir_name(%u, 0x%x (%u))\n", fd, path, path_len);
if (fd >= wasi->fdtable.size()) {
return WASI_EBADF;
}
switch (wasi->fdtable[fd].type) {
case wasi_fd_type::VACANT:
return WASI_EBADF;
case wasi_fd_type::FS:
std::strncpy((char *)WASM_MEM(path), wasi->fdtable[fd].dir_handle()->c_str(), path_len);
return WASI_ESUCCESS;
case wasi_fd_type::ZIP:
std::strncpy((char *)WASM_MEM(path), wasi->fdtable[fd].zip_handle()->path.c_str(), path_len);
return WASI_ESUCCESS;
case wasi_fd_type::STDIN:
case wasi_fd_type::STDOUT:
case wasi_fd_type::STDERR:
case wasi_fd_type::FSDIR:
case wasi_fd_type::FSFILE:
case wasi_fd_type::ZIPDIR:
case wasi_fd_type::ZIPFILE:
return WASI_EINVAL;
}
return WASI_EBADF;
}
extern "C" u32 w2c_wasi__snapshot__preview1_fd_prestat_get(wasi_t *wasi, u32 fd, usize result) {
WASI_DEBUG("fd_prestat_get(%u)\n", fd);
if (fd >= wasi->fdtable.size()) {
return WASI_EBADF;
}
switch (wasi->fdtable[fd].type) {
case wasi_fd_type::VACANT:
return WASI_EBADF;
case wasi_fd_type::FS:
WASM_SET(u32, result, 0);
WASM_SET(u32, result + 4, wasi->fdtable[fd].dir_handle()->length());
return WASI_ESUCCESS;
case wasi_fd_type::ZIP:
WASM_SET(u32, result, 0);
WASM_SET(u32, result + 4, wasi->fdtable[fd].zip_handle()->path.length());
return WASI_ESUCCESS;
case wasi_fd_type::STDIN:
case wasi_fd_type::STDOUT:
case wasi_fd_type::STDERR:
case wasi_fd_type::FSDIR:
case wasi_fd_type::FSFILE:
case wasi_fd_type::ZIPDIR:
case wasi_fd_type::ZIPFILE:
return WASI_EINVAL;
}
return WASI_EBADF;
}
extern "C" u32 w2c_wasi__snapshot__preview1_fd_pwrite(wasi_t *wasi, u32 fd, usize iovs, u32 iovs_len, u64 offset, usize result) {
WASI_DEBUG("fd_pwrite(%u, 0x%08x (%u), %lu)\n", fd, iovs, iovs_len, offset);
return WASI_ENOSYS;
}
extern "C" u32 w2c_wasi__snapshot__preview1_fd_read(wasi_t *wasi, u32 fd, usize iovs, u32 iovs_len, usize result) {
WASI_DEBUG("fd_read(%u, 0x%08x (%u))\n", fd, iovs, iovs_len);
if (fd >= wasi->fdtable.size()) {
return WASI_EBADF;
}
switch (wasi->fdtable[fd].type) {
case wasi_fd_type::VACANT:
return WASI_EBADF;
case wasi_fd_type::STDIN:
case wasi_fd_type::STDOUT:
case wasi_fd_type::STDERR:
WASM_SET(u32, result, 0);
return WASI_ESUCCESS;
case wasi_fd_type::FS:
case wasi_fd_type::FSDIR:
case wasi_fd_type::ZIP:
case wasi_fd_type::ZIPDIR:
return WASI_EINVAL;
case wasi_fd_type::FSFILE:
{
u32 size = 0;
while (iovs_len > 0) {
PHYSFS_sint64 n = PHYSFS_readBytes(wasi->fdtable[fd].file_handle()->get(), WASM_MEM(WASM_GET(u32, iovs)), WASM_GET(u32, iovs + 4));
if (n < 0) return WASI_EIO;
size += n;
iovs += 8;
--iovs_len;
}
WASM_SET(u32, result, size);
return WASI_ESUCCESS;
}
case wasi_fd_type::ZIPFILE:
{
u32 size = 0;
while (iovs_len > 0) {
zip_int64_t n = zip_fread(wasi->fdtable[fd].zip_file_handle()->zip_file_handle.file, WASM_MEM(WASM_GET(u32, iovs)), WASM_GET(u32, iovs + 4));
if (n < 0) return WASI_EIO;
size += n;
iovs += 8;
--iovs_len;
}
WASM_SET(u32, result, size);
return WASI_ESUCCESS;
}
}
return WASI_EBADF;
}
extern "C" u32 w2c_wasi__snapshot__preview1_fd_readdir(wasi_t *wasi, u32 fd, usize buf, u32 buf_len, u64 cookie, usize result) {
WASI_DEBUG("fd_readdir(%u, 0x%08x (%u), %lu)\n", fd, buf, buf_len, cookie);
if (fd >= wasi->fdtable.size()) {
return WASI_EBADF;
}
switch (wasi->fdtable[fd].type) {
case wasi_fd_type::VACANT:
return WASI_EBADF;
case wasi_fd_type::STDIN:
case wasi_fd_type::STDOUT:
case wasi_fd_type::STDERR:
case wasi_fd_type::FSFILE:
case wasi_fd_type::ZIPFILE:
return WASI_EINVAL;
case wasi_fd_type::FS:
case wasi_fd_type::FSDIR:
{
struct fs_enumerate_data edata = {
.wasi = wasi,
.fd = fd,
.original_buf = buf,
.buf = buf,
.buf_len = buf_len,
.initial_cookie = cookie,
.cookie = 0,
.result = result,
};
bool success = PHYSFS_enumerate(
wasi->fdtable[fd].dir_handle()->c_str(),
[](void *data, const char *path, const char *filename) {
struct fs_enumerate_data *edata = (struct fs_enumerate_data *)data;
wasi_t *wasi = edata->wasi;
PHYSFS_Stat stat;
if (!PHYSFS_stat(edata->wasi->fdtable[edata->fd].dir_handle()->c_str(), &stat)) {
return PHYSFS_ENUM_OK;
}
if (stat.filetype != PHYSFS_FILETYPE_DIRECTORY && stat.filetype != PHYSFS_FILETYPE_REGULAR) {
return PHYSFS_ENUM_OK;
}
if (edata->cookie++ < edata->initial_cookie) {
return PHYSFS_ENUM_OK;
}
if (edata->buf - edata->original_buf + 8 > edata->buf_len) {
return PHYSFS_ENUM_STOP;
}
WASM_SET(u64, edata->buf, edata->cookie);
edata->buf += 8;
if (edata->buf - edata->original_buf + 8 > edata->buf_len) {
return PHYSFS_ENUM_STOP;
}
WASM_SET(u64, edata->buf, 0); // TODO: generate a pseudorandom inode number
edata->buf += 8;
if (edata->buf - edata->original_buf + 4 > edata->buf_len) {
return PHYSFS_ENUM_STOP;
}
WASM_SET(u32, edata->buf, std::strlen(filename));
edata->buf += 4;
if (edata->buf - edata->original_buf + 4 > edata->buf_len) {
return PHYSFS_ENUM_STOP;
}
WASM_SET(u8, edata->buf, stat.filetype);
edata->buf += 4;
u32 len = std::min(std::strlen(filename), (size_t)(edata->original_buf + edata->buf_len - edata->buf));
std::memcpy(WASM_MEM(edata->buf), filename, std::strlen(filename));
edata->buf += len;
return PHYSFS_ENUM_OK;
},
(void *)&edata
);
if (success) {
WASM_SET(u32, result, edata.buf - edata.original_buf);
return WASI_ESUCCESS;
}
return success ? WASI_ESUCCESS : WASI_ENOENT;
}
case wasi_fd_type::ZIP:
case wasi_fd_type::ZIPDIR:
{
usize original_buf = buf;
std::string *prefix = wasi->fdtable[fd].type == wasi_fd_type::ZIP ? NULL : &wasi->fdtable[fd].zip_dir_handle()->path;
u32 n_slashes = 0;
if (prefix != NULL) {
for (u32 i = 0; i < prefix->length(); ++i) {
if ((*prefix)[i] == '/') {
++n_slashes;
}
}
}
std::shared_ptr<struct wasi_zip_container> zip = wasi->fdtable[fd].type == wasi_fd_type::ZIP
? wasi->fdtable[fd].zip_handle()->zip
: wasi->fdtable[wasi->fdtable[fd].zip_dir_handle()->parent_fd].zip_handle()->zip;
auto it = std::lower_bound(
zip->path_cache.begin(),
zip->path_cache.end(),
prefix == NULL ? std::make_pair(n_slashes, "") : std::make_pair(n_slashes, *prefix)
);
it += cookie;
while (it != zip->path_cache.end() && it->first == n_slashes && (prefix == NULL || std::strncmp(it->second.c_str(), prefix->c_str(), prefix->length()) == 0)) {
++cookie;
struct wasi_zip_stat info = wasi_zip_stat(
wasi->fdtable[fd].type == wasi_fd_type::ZIP
? wasi->fdtable[fd].zip_handle()->zip->zip
: wasi->fdtable[wasi->fdtable[fd].zip_dir_handle()->parent_fd].zip_handle()->zip->zip,
it->second.c_str(),
it->second.length()
);
if (!info.exists) {
++it;
continue;
}
u32 suffix_length = it->second.length() - (prefix == NULL ? 0 : prefix->length());
if (buf - original_buf + 8 > buf_len) {
WASM_SET(u32, result, buf - original_buf);
return WASI_ESUCCESS;
}
WASM_SET(u64, buf, cookie);
buf += 8;
if (buf - original_buf + 8 > buf_len) {
WASM_SET(u32, result, buf - original_buf);
return WASI_ESUCCESS;
}
WASM_SET(u64, buf, info.inode);
buf += 8;
if (buf - original_buf + 4 > buf_len) {
WASM_SET(u32, result, buf - original_buf);
return WASI_ESUCCESS;
}
WASM_SET(u32, buf, suffix_length);
buf += 4;
if (buf - original_buf + 4 > buf_len) {
WASM_SET(u32, result, buf - original_buf);
return WASI_ESUCCESS;
}
WASM_SET(u8, buf, info.filetype);
buf += 4;
u32 len = std::min(suffix_length, original_buf + buf_len - buf);
std::memcpy(WASM_MEM(buf), it->second.c_str() + (prefix == NULL ? 0 : prefix->length()), len);
buf += len;
++it;
}
WASM_SET(u32, result, buf - original_buf);
return WASI_ESUCCESS;
}
}
return WASI_EBADF;
}
extern "C" u32 w2c_wasi__snapshot__preview1_fd_renumber(wasi_t *wasi, u32 fd, u32 to) {
WASI_DEBUG("fd_renumber(%u, %u)\n", fd, to);
if (fd >= wasi->fdtable.size()) {
return WASI_EBADF;
}
switch (wasi->fdtable[fd].type) {
case wasi_fd_type::VACANT:
return WASI_EBADF;
case wasi_fd_type::STDIN:
case wasi_fd_type::STDOUT:
case wasi_fd_type::STDERR:
case wasi_fd_type::FS:
case wasi_fd_type::ZIP:
return WASI_EINVAL;
case wasi_fd_type::FSDIR:
case wasi_fd_type::FSFILE:
case wasi_fd_type::ZIPDIR:
case wasi_fd_type::ZIPFILE:
break;
}
if (fd == to) {
return WASI_ESUCCESS;
}
if (to >= wasi->fdtable.size()) return WASI_EBADF;
switch (wasi->fdtable[to].type) {
case wasi_fd_type::VACANT:
return WASI_EBADF;
case wasi_fd_type::STDIN:
case wasi_fd_type::STDOUT:
case wasi_fd_type::STDERR:
case wasi_fd_type::FS:
case wasi_fd_type::ZIP:
return WASI_EINVAL;
case wasi_fd_type::FSDIR:
case wasi_fd_type::FSFILE:
case wasi_fd_type::ZIPDIR:
case wasi_fd_type::ZIPFILE:
wasi->deallocate_file_descriptor(to);
if (to == wasi->fdtable.size()) {
wasi->fdtable.push_back(wasi->fdtable[fd]);
} else {
wasi->fdtable[to] = wasi->fdtable[fd];
}
if (!wasi->fdtable.empty() && fd == wasi->fdtable.size() - 1) {
wasi->fdtable.pop_back();
} else {
wasi->fdtable[fd] = {.type = wasi_fd_type::VACANT, .handle = NULL};
wasi->vacant_fds.push_back(fd);
}
return WASI_ESUCCESS;
}
return WASI_EBADF;
}
extern "C" u32 w2c_wasi__snapshot__preview1_fd_seek(wasi_t *wasi, u32 fd, u64 offset, u32 whence, usize result) {
WASI_DEBUG("fd_seek(%u, %lu, %u)\n", fd, offset, whence);
return WASI_ENOSYS;
}
extern "C" u32 w2c_wasi__snapshot__preview1_fd_sync(wasi_t *wasi, u32 fd) {
WASI_DEBUG("fd_sync(%u)\n", fd);
return WASI_ENOSYS;
}
extern "C" u32 w2c_wasi__snapshot__preview1_fd_tell(wasi_t *wasi, u32 fd, usize result) {
WASI_DEBUG("fd_tell(%u)\n", fd);
if (fd >= wasi->fdtable.size()) {
return WASI_EBADF;
}
switch (wasi->fdtable[fd].type) {
case wasi_fd_type::VACANT:
return WASI_EBADF;
case wasi_fd_type::STDIN:
case wasi_fd_type::STDOUT:
case wasi_fd_type::STDERR:
case wasi_fd_type::FS:
case wasi_fd_type::FSDIR:
case wasi_fd_type::ZIP:
case wasi_fd_type::ZIPDIR:
return WASI_EINVAL;
case wasi_fd_type::FSFILE:
WASM_SET(u64, result, PHYSFS_tell(wasi->fdtable[fd].file_handle()->get()));
return WASI_ESUCCESS;
case wasi_fd_type::ZIPFILE:
WASM_SET(u64, result, zip_ftell(wasi->fdtable[fd].zip_file_handle()->zip_file_handle.file));
return WASI_ESUCCESS;
}
return WASI_EBADF;
}
extern "C" u32 w2c_wasi__snapshot__preview1_fd_write(wasi_t *wasi, u32 fd, usize iovs, u32 iovs_len, usize result) {
WASI_DEBUG("fd_write(%u, 0x%08x (%u))\n", fd, iovs, iovs_len);
if (fd >= wasi->fdtable.size()) {
return WASI_EBADF;
}
switch (wasi->fdtable[fd].type) {
case wasi_fd_type::VACANT:
return WASI_EBADF;
case wasi_fd_type::STDIN:
WASM_SET(u32, result, 0);
return WASI_ESUCCESS;
case wasi_fd_type::STDOUT:
case wasi_fd_type::STDERR:
{
u32 size = 0;
std::string buf;
while (iovs_len > 0) {
buf.append((const char *)WASM_MEM(WASM_GET(u32, iovs)), strlen_safe((const char *)WASM_MEM(WASM_GET(u32, iovs)), WASM_GET(u32, iovs + 4)));
size += WASM_GET(u32, iovs + 4);
iovs += 8;
--iovs_len;
}
std::string line;
std::istringstream stream(buf);
while (std::getline(stream, line)) {
mkxp_retro::log_printf(wasi->fdtable[fd].type == wasi_fd_type::STDOUT ? RETRO_LOG_INFO : RETRO_LOG_ERROR, "%s\n", line.c_str());
}
WASM_SET(u32, result, size);
return WASI_ESUCCESS;
}
case wasi_fd_type::FS:
case wasi_fd_type::FSDIR:
case wasi_fd_type::ZIP:
case wasi_fd_type::ZIPDIR:
return WASI_EINVAL;
case wasi_fd_type::FSFILE:
case wasi_fd_type::ZIPFILE:
return WASI_EROFS;
}
return WASI_EBADF;
}
extern "C" u32 w2c_wasi__snapshot__preview1_path_create_directory(wasi_t *wasi, u32 fd, usize path, u32 path_len) {
WASI_DEBUG("path_create_directory(%u, \"%.*s\")\n", fd, path_len, (char *)WASM_MEM(path));
return WASI_ENOSYS;
}
extern "C" u32 w2c_wasi__snapshot__preview1_path_filestat_get(wasi_t *wasi, u32 fd, u32 flags, usize path, u32 path_len, usize result) {
WASI_DEBUG("path_filestat_get(%u, %u, \"%.*s\")\n", fd, flags, path_len, (char *)WASM_MEM(path));
if (fd >= wasi->fdtable.size()) {
return WASI_EBADF;
}
switch (wasi->fdtable[fd].type) {
case wasi_fd_type::VACANT:
return WASI_EBADF;
case wasi_fd_type::STDIN:
case wasi_fd_type::STDOUT:
case wasi_fd_type::STDERR:
case wasi_fd_type::FSFILE:
case wasi_fd_type::ZIPFILE:
return WASI_EINVAL;
case wasi_fd_type::FS:
case wasi_fd_type::FSDIR:
{
PHYSFS_Stat stat;
std::string new_path(*wasi->fdtable[fd].dir_handle());
new_path.push_back('/');
new_path.append((const char *)WASM_MEM(path), strlen_safe((const char *)WASM_MEM(path), path_len));
new_path = mkxp_retro::fs->normalize(new_path.c_str(), false, true);
if (std::strncmp(new_path.c_str(), wasi->fdtable[fd].dir_handle()->c_str(), wasi->fdtable[fd].dir_handle()->length()) != 0) {
return WASI_EPERM;
}
if (!PHYSFS_stat(new_path.c_str(), &stat)) {
return WASI_ENOENT;
}
if (stat.filetype != PHYSFS_FILETYPE_DIRECTORY && stat.filetype != PHYSFS_FILETYPE_REGULAR) {
return WASI_EIO;
}
WASM_SET(u64, result, fd); // dev
WASM_SET(u64, result + 8, 0); // ino // TODO: generate a pseudorandom inode number
WASM_SET(u8, result + 16, stat.filetype == PHYSFS_FILETYPE_DIRECTORY ? WASI_IFDIR : WASI_IFREG); // filetype
WASM_SET(u32, result + 24, 1); // nlink
WASM_SET(u64, result + 32, stat.filetype); // size
WASM_SET(u64, result + 40, stat.accesstime * 1000000000L); // atim
WASM_SET(u64, result + 48, stat.modtime * 1000000000L); // mtim
WASM_SET(u64, result + 56, stat.createtime * 1000000000L); // ctim
return WASI_ESUCCESS;
}
case wasi_fd_type::ZIP:
{
struct wasi_zip_stat info = wasi_zip_stat(wasi->fdtable[fd].zip_handle()->zip->zip, (char *)WASM_MEM(path), path_len);
if (!info.exists) {
return WASI_ENOENT;
}
WASM_SET(u64, result, fd); // dev
WASM_SET(u64, result + 8, info.inode); // ino
WASM_SET(u8, result + 16, info.filetype); // filetype
WASM_SET(u32, result + 24, 1); // nlink
WASM_SET(u64, result + 32, info.size); // size
WASM_SET(u64, result + 40, info.mtime); // atim
WASM_SET(u64, result + 48, info.mtime); // mtim
WASM_SET(u64, result + 56, info.mtime); // ctim
return WASI_ESUCCESS;
}
case wasi_fd_type::ZIPDIR:
{
std::string new_path(wasi->fdtable[fd].zip_dir_handle()->path);
new_path.append((const char *)WASM_MEM(path), strlen_safe((const char *)WASM_MEM(path), path_len));
struct wasi_zip_stat info = wasi_zip_stat(wasi->fdtable[wasi->fdtable[fd].zip_dir_handle()->parent_fd].zip_handle()->zip->zip, new_path.c_str(), new_path.length());
if (!info.exists) {
return WASI_ENOENT;
}
WASM_SET(u64, result, wasi->fdtable[fd].zip_dir_handle()->parent_fd); // dev
WASM_SET(u64, result + 8, info.inode); // ino
WASM_SET(u8, result + 16, info.filetype); // filetype
WASM_SET(u32, result + 24, 1); // nlink
WASM_SET(u64, result + 32, info.size); // size
WASM_SET(u64, result + 40, info.mtime); // atim
WASM_SET(u64, result + 48, info.mtime); // mtim
WASM_SET(u64, result + 56, info.mtime); // ctim
return WASI_ESUCCESS;
}
}
return WASI_EBADF;
}
extern "C" u32 w2c_wasi__snapshot__preview1_path_filestat_set_times(wasi_t *wasi, u32 fd, u32 flags, usize path, u32 path_len, u64 atim, u64 ntim, u32 fst_flags) {
WASI_DEBUG("path_filestat_set_times(%u, %u, \"%.*s\", %lu, %lu, %u)\n", fd, flags, path_len, (char *)WASM_MEM(path), atim, ntim, fst_flags);
return WASI_ENOSYS;
}
extern "C" u32 w2c_wasi__snapshot__preview1_path_link(wasi_t *wasi, u32 old_fd, u32 old_flags, usize old_path, u32 old_path_len, u32 new_fd, usize new_path, u32 new_path_len) {
WASI_DEBUG("path_link(%u, %u, \"%.*s\", %u, \"%.*s\")\n", old_fd, old_flags, old_path_len, (char *)WASM_MEM(old_path), new_fd, new_path_len, (char *)WASM_MEM(new_path));
return WASI_ENOSYS;
}
extern "C" u32 w2c_wasi__snapshot__preview1_path_open(wasi_t *wasi, u32 fd, u32 dirflags, usize path, u32 path_len, u32 oflags, u64 fs_base_rights, u64 fs_rights_inheriting, u32 fdflags, usize result) {
WASI_DEBUG("path_open(%u, %u, \"%.*s\", %u, %lu, %lu, %u)\n", fd, dirflags, path_len, (char *)WASM_MEM(path), oflags, fs_base_rights, fs_rights_inheriting, fdflags);
if (fd >= wasi->fdtable.size()) {
return WASI_EBADF;
}
switch (wasi->fdtable[fd].type) {
case wasi_fd_type::VACANT:
return WASI_EBADF;
case wasi_fd_type::STDIN:
case wasi_fd_type::STDOUT:
case wasi_fd_type::STDERR:
case wasi_fd_type::FSFILE:
case wasi_fd_type::ZIPFILE:
return WASI_EINVAL;
case wasi_fd_type::FS:
case wasi_fd_type::FSDIR:
{
PHYSFS_Stat stat;
std::string new_path(*wasi->fdtable[fd].dir_handle());
new_path.push_back('/');
new_path.append((const char *)WASM_MEM(path), strlen_safe((const char *)WASM_MEM(path), path_len));
new_path = mkxp_retro::fs->normalize(new_path.c_str(), false, true);
if (std::strncmp(new_path.c_str(), wasi->fdtable[fd].dir_handle()->c_str(), wasi->fdtable[fd].dir_handle()->length()) != 0) {
return WASI_EPERM;
}
if (!PHYSFS_stat(new_path.c_str(), &stat)) {
return WASI_ENOENT;
}
if (stat.filetype != PHYSFS_FILETYPE_DIRECTORY && stat.filetype != PHYSFS_FILETYPE_REGULAR) {
return WASI_EIO;
}
if (stat.filetype == PHYSFS_FILETYPE_DIRECTORY) {
std::string *handle = new std::string(new_path);
WASM_SET(u32, result, wasi->allocate_file_descriptor(wasi_fd_type::FSDIR, handle));
} else {
struct FileSystem::File *handle = new FileSystem::File(*mkxp_retro::fs, new_path.c_str(), FileSystem::OpenMode::Read);
WASM_SET(u32, result, wasi->allocate_file_descriptor(wasi_fd_type::FSFILE, handle));
}
return WASI_ESUCCESS;
}
case wasi_fd_type::ZIP:
case wasi_fd_type::ZIPDIR:
{
std::string new_path;
if (wasi->fdtable[fd].type == wasi_fd_type::ZIPDIR) {
new_path.append(wasi->fdtable[fd].zip_dir_handle()->path);
}
new_path.append((const char *)WASM_MEM(path), strlen_safe((const char *)WASM_MEM(path), path_len));
struct wasi_zip_stat info = wasi_zip_stat(
wasi->fdtable[fd].type == wasi_fd_type::ZIP
? wasi->fdtable[fd].zip_handle()->zip->zip
: wasi->fdtable[wasi->fdtable[fd].zip_dir_handle()->parent_fd].zip_handle()->zip->zip,
new_path.c_str(),
new_path.length()
);
if (!info.exists) {
return WASI_ENOENT;
}
if (info.filetype == WASI_IFDIR) {
struct wasi_zip_dir_handle *handle = new (struct wasi_zip_dir_handle){
.index = info.inode,
.path = info.normalized_path,
.parent_fd = wasi->fdtable[fd].type == wasi_fd_type::ZIPDIR ? wasi->fdtable[fd].zip_dir_handle()->parent_fd : fd,
};
WASM_SET(u32, result, wasi->allocate_file_descriptor(wasi_fd_type::ZIPDIR, handle));
} else {
struct wasi_zip_file_handle *handle = new (struct wasi_zip_file_handle){
.index = info.inode,
.zip_file_handle = wasi_zip_file_container(
wasi->fdtable[fd].type == wasi_fd_type::ZIP
? *wasi->fdtable[fd].zip_handle()->zip
: *wasi->fdtable[wasi->fdtable[fd].zip_dir_handle()->parent_fd].zip_handle()->zip,
info.inode,
0
),
.parent_fd = wasi->fdtable[fd].type == wasi_fd_type::ZIPDIR ? wasi->fdtable[fd].zip_dir_handle()->parent_fd : fd,
};
WASM_SET(u32, result, wasi->allocate_file_descriptor(wasi_fd_type::ZIPFILE, handle));
}
return WASI_ESUCCESS;
}
}
return WASI_EBADF;
}
extern "C" u32 w2c_wasi__snapshot__preview1_path_readlink(wasi_t *wasi, u32 fd, usize path, u32 path_len, usize buf, u32 buf_len, usize result) {
WASI_DEBUG("path_readlink(%u, \"%.*s\", 0x%08x (%u))\n", fd, path_len, (char *)WASM_MEM(path), buf, buf_len);
return WASI_ENOSYS;
}
extern "C" u32 w2c_wasi__snapshot__preview1_path_remove_directory(wasi_t *wasi, u32 fd, usize path, u32 path_len) {
WASI_DEBUG("path_remove_directory(%u, \"%.*s\")\n", fd, path_len, (char *)WASM_MEM(path));
return WASI_ENOSYS;
}
extern "C" u32 w2c_wasi__snapshot__preview1_path_rename(wasi_t *wasi, u32 fd, usize old_path, u32 old_path_len, u32 new_fd, usize new_path, u32 new_path_len) {
WASI_DEBUG("path_rename(%u, \"%.*s\", %u, \"%.*s\")\n", fd, old_path_len, (char *)WASM_MEM(old_path), new_fd, new_path_len, (char *)WASM_MEM(new_path));
return WASI_ENOSYS;
}
extern "C" u32 w2c_wasi__snapshot__preview1_path_symlink(wasi_t *wasi, usize old_path, u32 old_path_len, u32 fd, usize new_path, u32 new_path_len) {
WASI_DEBUG("path_symlink(\"%.*s\", %u, \"%.*s\")\n", old_path_len, (char *)WASM_MEM(old_path), fd, new_path_len, (char *)WASM_MEM(new_path));
return WASI_ENOSYS;
}
extern "C" u32 w2c_wasi__snapshot__preview1_path_unlink_file(wasi_t *wasi, u32 fd, usize path, u32 path_len) {
WASI_DEBUG("path_unlink_file(%u, \"%.*s\")\n", fd, path_len, (char *)WASM_MEM(path));
return WASI_ENOSYS;
}
extern "C" u32 w2c_wasi__snapshot__preview1_poll_oneoff(wasi_t *wasi, usize in, usize out, u32 nsubscriptions, usize result) {
WASI_DEBUG("poll_oneoff(0x%08x, 0x%08x, %u)\n", in, out, nsubscriptions);
return WASI_ENOSYS;
}
extern "C" void w2c_wasi__snapshot__preview1_proc_exit(wasi_t *wasi, u32 rval) {
WASI_DEBUG("proc_exit(%u)\n", rval);
throw SandboxTrapException();
}
extern "C" u32 w2c_wasi__snapshot__preview1_random_get(wasi_t *wasi, usize buf, u32 buf_len) {
WASI_DEBUG("random_get(0x%08x (%u))\n", buf, buf_len);
static std::random_device dev;
static std::mt19937 rng(dev());
static u32 rng_buffer;
static u32 rng_buffer_size = 0;
while (buf_len > 0) {
if (rng_buffer_size == 0) {
rng_buffer = rng();
rng_buffer_size = 4;
} else {
u32 n = std::min(rng_buffer_size, buf_len);
std::memcpy(WASM_MEM(buf), (u8 *)&rng_buffer + (4 - n), n);
buf += n;
buf_len -= n;
rng_buffer_size -= n;
}
}
return WASI_ESUCCESS;
}
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