Adding upstream version 0.0~git20221206.8b7148f.upstream/0.0_git20221206.8b7148f

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

5 files changed, 2353 insertions, 0 deletions

diff --git a/libc-bottom-half/headers/public/wasi/api.h b/libc-bottom-half/headers/public/wasi/api.h
new file mode 100644
index 0000000..1ab7699
--- /dev/null
+++ b/libc-bottom-half/headers/public/wasi/api.h
@@ -0,0 +1,2115 @@
+/**
+ * <wasi/api.h>. This file contains declarations describing the WASI ABI
+ * as of "snapshot preview1". It was originally auto-generated from
+ * wasi_snapshot_preview1.witx, however WASI is in the process of
+ * transitioning to a new IDL and header file generator, and this file
+ * is temporarily being manually maintained.
+ *
+ * @file
+ * This file describes the [WASI] interface, consisting of functions, types,
+ * and defined values (macros).
+ *
+ * The interface described here is greatly inspired by [CloudABI]'s clean,
+ * thoughtfully-designed, capability-oriented, POSIX-style API.
+ *
+ * [CloudABI]: https://github.com/NuxiNL/cloudlibc
+ * [WASI]: https://github.com/WebAssembly/WASI/
+ */
+
+#ifndef __wasi_api_h
+#define __wasi_api_h
+
+#ifndef __wasi__
+#error <wasi/api.h> is only supported on WASI platforms.
+#endif
+
+#ifndef __wasm32__
+#error <wasi/api.h> only supports wasm32; doesn't yet support wasm64
+#endif
+
+#include <stddef.h>
+#include <stdint.h>
+
+_Static_assert(_Alignof(int8_t) == 1, "non-wasi data layout");
+_Static_assert(_Alignof(uint8_t) == 1, "non-wasi data layout");
+_Static_assert(_Alignof(int16_t) == 2, "non-wasi data layout");
+_Static_assert(_Alignof(uint16_t) == 2, "non-wasi data layout");
+_Static_assert(_Alignof(int32_t) == 4, "non-wasi data layout");
+_Static_assert(_Alignof(uint32_t) == 4, "non-wasi data layout");
+_Static_assert(_Alignof(int64_t) == 8, "non-wasi data layout");
+_Static_assert(_Alignof(uint64_t) == 8, "non-wasi data layout");
+_Static_assert(_Alignof(void*) == 4, "non-wasi data layout");
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// TODO: Encoding this in witx.
+#define __WASI_DIRCOOKIE_START (UINT64_C(0))
+typedef __SIZE_TYPE__ __wasi_size_t;
+
+_Static_assert(sizeof(__wasi_size_t) == 4, "witx calculated size");
+_Static_assert(_Alignof(__wasi_size_t) == 4, "witx calculated align");
+
+/**
+ * Non-negative file size or length of a region within a file.
+ */
+typedef uint64_t __wasi_filesize_t;
+
+_Static_assert(sizeof(__wasi_filesize_t) == 8, "witx calculated size");
+_Static_assert(_Alignof(__wasi_filesize_t) == 8, "witx calculated align");
+
+/**
+ * Timestamp in nanoseconds.
+ */
+typedef uint64_t __wasi_timestamp_t;
+
+_Static_assert(sizeof(__wasi_timestamp_t) == 8, "witx calculated size");
+_Static_assert(_Alignof(__wasi_timestamp_t) == 8, "witx calculated align");
+
+/**
+ * Identifiers for clocks.
+ */
+typedef uint32_t __wasi_clockid_t;
+
+/**
+ * The clock measuring real time. Time value zero corresponds with
+ * 1970-01-01T00:00:00Z.
+ */
+#define __WASI_CLOCKID_REALTIME (UINT32_C(0))
+
+/**
+ * The store-wide monotonic clock, which is defined as a clock measuring
+ * real time, whose value cannot be adjusted and which cannot have negative
+ * clock jumps. The epoch of this clock is undefined. The absolute time
+ * value of this clock therefore has no meaning.
+ */
+#define __WASI_CLOCKID_MONOTONIC (UINT32_C(1))
+
+/**
+ * The CPU-time clock associated with the current process.
+ */
+#define __WASI_CLOCKID_PROCESS_CPUTIME_ID (UINT32_C(2))
+
+/**
+ * The CPU-time clock associated with the current thread.
+ */
+#define __WASI_CLOCKID_THREAD_CPUTIME_ID (UINT32_C(3))
+
+_Static_assert(sizeof(__wasi_clockid_t) == 4, "witx calculated size");
+_Static_assert(_Alignof(__wasi_clockid_t) == 4, "witx calculated align");
+
+/**
+ * Error codes returned by functions.
+ * Not all of these error codes are returned by the functions provided by this
+ * API; some are used in higher-level library layers, and others are provided
+ * merely for alignment with POSIX.
+ */
+typedef uint16_t __wasi_errno_t;
+
+/**
+ * No error occurred. System call completed successfully.
+ */
+#define __WASI_ERRNO_SUCCESS (UINT16_C(0))
+
+/**
+ * Argument list too long.
+ */
+#define __WASI_ERRNO_2BIG (UINT16_C(1))
+
+/**
+ * Permission denied.
+ */
+#define __WASI_ERRNO_ACCES (UINT16_C(2))
+
+/**
+ * Address in use.
+ */
+#define __WASI_ERRNO_ADDRINUSE (UINT16_C(3))
+
+/**
+ * Address not available.
+ */
+#define __WASI_ERRNO_ADDRNOTAVAIL (UINT16_C(4))
+
+/**
+ * Address family not supported.
+ */
+#define __WASI_ERRNO_AFNOSUPPORT (UINT16_C(5))
+
+/**
+ * Resource unavailable, or operation would block.
+ */
+#define __WASI_ERRNO_AGAIN (UINT16_C(6))
+
+/**
+ * Connection already in progress.
+ */
+#define __WASI_ERRNO_ALREADY (UINT16_C(7))
+
+/**
+ * Bad file descriptor.
+ */
+#define __WASI_ERRNO_BADF (UINT16_C(8))
+
+/**
+ * Bad message.
+ */
+#define __WASI_ERRNO_BADMSG (UINT16_C(9))
+
+/**
+ * Device or resource busy.
+ */
+#define __WASI_ERRNO_BUSY (UINT16_C(10))
+
+/**
+ * Operation canceled.
+ */
+#define __WASI_ERRNO_CANCELED (UINT16_C(11))
+
+/**
+ * No child processes.
+ */
+#define __WASI_ERRNO_CHILD (UINT16_C(12))
+
+/**
+ * Connection aborted.
+ */
+#define __WASI_ERRNO_CONNABORTED (UINT16_C(13))
+
+/**
+ * Connection refused.
+ */
+#define __WASI_ERRNO_CONNREFUSED (UINT16_C(14))
+
+/**
+ * Connection reset.
+ */
+#define __WASI_ERRNO_CONNRESET (UINT16_C(15))
+
+/**
+ * Resource deadlock would occur.
+ */
+#define __WASI_ERRNO_DEADLK (UINT16_C(16))
+
+/**
+ * Destination address required.
+ */
+#define __WASI_ERRNO_DESTADDRREQ (UINT16_C(17))
+
+/**
+ * Mathematics argument out of domain of function.
+ */
+#define __WASI_ERRNO_DOM (UINT16_C(18))
+
+/**
+ * Reserved.
+ */
+#define __WASI_ERRNO_DQUOT (UINT16_C(19))
+
+/**
+ * File exists.
+ */
+#define __WASI_ERRNO_EXIST (UINT16_C(20))
+
+/**
+ * Bad address.
+ */
+#define __WASI_ERRNO_FAULT (UINT16_C(21))
+
+/**
+ * File too large.
+ */
+#define __WASI_ERRNO_FBIG (UINT16_C(22))
+
+/**
+ * Host is unreachable.
+ */
+#define __WASI_ERRNO_HOSTUNREACH (UINT16_C(23))
+
+/**
+ * Identifier removed.
+ */
+#define __WASI_ERRNO_IDRM (UINT16_C(24))
+
+/**
+ * Illegal byte sequence.
+ */
+#define __WASI_ERRNO_ILSEQ (UINT16_C(25))
+
+/**
+ * Operation in progress.
+ */
+#define __WASI_ERRNO_INPROGRESS (UINT16_C(26))
+
+/**
+ * Interrupted function.
+ */
+#define __WASI_ERRNO_INTR (UINT16_C(27))
+
+/**
+ * Invalid argument.
+ */
+#define __WASI_ERRNO_INVAL (UINT16_C(28))
+
+/**
+ * I/O error.
+ */
+#define __WASI_ERRNO_IO (UINT16_C(29))
+
+/**
+ * Socket is connected.
+ */
+#define __WASI_ERRNO_ISCONN (UINT16_C(30))
+
+/**
+ * Is a directory.
+ */
+#define __WASI_ERRNO_ISDIR (UINT16_C(31))
+
+/**
+ * Too many levels of symbolic links.
+ */
+#define __WASI_ERRNO_LOOP (UINT16_C(32))
+
+/**
+ * File descriptor value too large.
+ */
+#define __WASI_ERRNO_MFILE (UINT16_C(33))
+
+/**
+ * Too many links.
+ */
+#define __WASI_ERRNO_MLINK (UINT16_C(34))
+
+/**
+ * Message too large.
+ */
+#define __WASI_ERRNO_MSGSIZE (UINT16_C(35))
+
+/**
+ * Reserved.
+ */
+#define __WASI_ERRNO_MULTIHOP (UINT16_C(36))
+
+/**
+ * Filename too long.
+ */
+#define __WASI_ERRNO_NAMETOOLONG (UINT16_C(37))
+
+/**
+ * Network is down.
+ */
+#define __WASI_ERRNO_NETDOWN (UINT16_C(38))
+
+/**
+ * Connection aborted by network.
+ */
+#define __WASI_ERRNO_NETRESET (UINT16_C(39))
+
+/**
+ * Network unreachable.
+ */
+#define __WASI_ERRNO_NETUNREACH (UINT16_C(40))
+
+/**
+ * Too many files open in system.
+ */
+#define __WASI_ERRNO_NFILE (UINT16_C(41))
+
+/**
+ * No buffer space available.
+ */
+#define __WASI_ERRNO_NOBUFS (UINT16_C(42))
+
+/**
+ * No such device.
+ */
+#define __WASI_ERRNO_NODEV (UINT16_C(43))
+
+/**
+ * No such file or directory.
+ */
+#define __WASI_ERRNO_NOENT (UINT16_C(44))
+
+/**
+ * Executable file format error.
+ */
+#define __WASI_ERRNO_NOEXEC (UINT16_C(45))
+
+/**
+ * No locks available.
+ */
+#define __WASI_ERRNO_NOLCK (UINT16_C(46))
+
+/**
+ * Reserved.
+ */
+#define __WASI_ERRNO_NOLINK (UINT16_C(47))
+
+/**
+ * Not enough space.
+ */
+#define __WASI_ERRNO_NOMEM (UINT16_C(48))
+
+/**
+ * No message of the desired type.
+ */
+#define __WASI_ERRNO_NOMSG (UINT16_C(49))
+
+/**
+ * Protocol not available.
+ */
+#define __WASI_ERRNO_NOPROTOOPT (UINT16_C(50))
+
+/**
+ * No space left on device.
+ */
+#define __WASI_ERRNO_NOSPC (UINT16_C(51))
+
+/**
+ * Function not supported.
+ */
+#define __WASI_ERRNO_NOSYS (UINT16_C(52))
+
+/**
+ * The socket is not connected.
+ */
+#define __WASI_ERRNO_NOTCONN (UINT16_C(53))
+
+/**
+ * Not a directory or a symbolic link to a directory.
+ */
+#define __WASI_ERRNO_NOTDIR (UINT16_C(54))
+
+/**
+ * Directory not empty.
+ */
+#define __WASI_ERRNO_NOTEMPTY (UINT16_C(55))
+
+/**
+ * State not recoverable.
+ */
+#define __WASI_ERRNO_NOTRECOVERABLE (UINT16_C(56))
+
+/**
+ * Not a socket.
+ */
+#define __WASI_ERRNO_NOTSOCK (UINT16_C(57))
+
+/**
+ * Not supported, or operation not supported on socket.
+ */
+#define __WASI_ERRNO_NOTSUP (UINT16_C(58))
+
+/**
+ * Inappropriate I/O control operation.
+ */
+#define __WASI_ERRNO_NOTTY (UINT16_C(59))
+
+/**
+ * No such device or address.
+ */
+#define __WASI_ERRNO_NXIO (UINT16_C(60))
+
+/**
+ * Value too large to be stored in data type.
+ */
+#define __WASI_ERRNO_OVERFLOW (UINT16_C(61))
+
+/**
+ * Previous owner died.
+ */
+#define __WASI_ERRNO_OWNERDEAD (UINT16_C(62))
+
+/**
+ * Operation not permitted.
+ */
+#define __WASI_ERRNO_PERM (UINT16_C(63))
+
+/**
+ * Broken pipe.
+ */
+#define __WASI_ERRNO_PIPE (UINT16_C(64))
+
+/**
+ * Protocol error.
+ */
+#define __WASI_ERRNO_PROTO (UINT16_C(65))
+
+/**
+ * Protocol not supported.
+ */
+#define __WASI_ERRNO_PROTONOSUPPORT (UINT16_C(66))
+
+/**
+ * Protocol wrong type for socket.
+ */
+#define __WASI_ERRNO_PROTOTYPE (UINT16_C(67))
+
+/**
+ * Result too large.
+ */
+#define __WASI_ERRNO_RANGE (UINT16_C(68))
+
+/**
+ * Read-only file system.
+ */
+#define __WASI_ERRNO_ROFS (UINT16_C(69))
+
+/**
+ * Invalid seek.
+ */
+#define __WASI_ERRNO_SPIPE (UINT16_C(70))
+
+/**
+ * No such process.
+ */
+#define __WASI_ERRNO_SRCH (UINT16_C(71))
+
+/**
+ * Reserved.
+ */
+#define __WASI_ERRNO_STALE (UINT16_C(72))
+
+/**
+ * Connection timed out.
+ */
+#define __WASI_ERRNO_TIMEDOUT (UINT16_C(73))
+
+/**
+ * Text file busy.
+ */
+#define __WASI_ERRNO_TXTBSY (UINT16_C(74))
+
+/**
+ * Cross-device link.
+ */
+#define __WASI_ERRNO_XDEV (UINT16_C(75))
+
+/**
+ * Extension: Capabilities insufficient.
+ */
+#define __WASI_ERRNO_NOTCAPABLE (UINT16_C(76))
+
+_Static_assert(sizeof(__wasi_errno_t) == 2, "witx calculated size");
+_Static_assert(_Alignof(__wasi_errno_t) == 2, "witx calculated align");
+
+/**
+ * File descriptor rights, determining which actions may be performed.
+ */
+typedef uint64_t __wasi_rights_t;
+
+/**
+ * The right to invoke `fd_datasync`.
+ * If `path_open` is set, includes the right to invoke
+ * `path_open` with `fdflags::dsync`.
+ */
+#define __WASI_RIGHTS_FD_DATASYNC ((__wasi_rights_t)(1 << 0))
+
+/**
+ * The right to invoke `fd_read` and `sock_recv`.
+ * If `rights::fd_seek` is set, includes the right to invoke `fd_pread`.
+ */
+#define __WASI_RIGHTS_FD_READ ((__wasi_rights_t)(1 << 1))
+
+/**
+ * The right to invoke `fd_seek`. This flag implies `rights::fd_tell`.
+ */
+#define __WASI_RIGHTS_FD_SEEK ((__wasi_rights_t)(1 << 2))
+
+/**
+ * The right to invoke `fd_fdstat_set_flags`.
+ */
+#define __WASI_RIGHTS_FD_FDSTAT_SET_FLAGS ((__wasi_rights_t)(1 << 3))
+
+/**
+ * The right to invoke `fd_sync`.
+ * If `path_open` is set, includes the right to invoke
+ * `path_open` with `fdflags::rsync` and `fdflags::dsync`.
+ */
+#define __WASI_RIGHTS_FD_SYNC ((__wasi_rights_t)(1 << 4))
+
+/**
+ * The right to invoke `fd_seek` in such a way that the file offset
+ * remains unaltered (i.e., `whence::cur` with offset zero), or to
+ * invoke `fd_tell`.
+ */
+#define __WASI_RIGHTS_FD_TELL ((__wasi_rights_t)(1 << 5))
+
+/**
+ * The right to invoke `fd_write` and `sock_send`.
+ * If `rights::fd_seek` is set, includes the right to invoke `fd_pwrite`.
+ */
+#define __WASI_RIGHTS_FD_WRITE ((__wasi_rights_t)(1 << 6))
+
+/**
+ * The right to invoke `fd_advise`.
+ */
+#define __WASI_RIGHTS_FD_ADVISE ((__wasi_rights_t)(1 << 7))
+
+/**
+ * The right to invoke `fd_allocate`.
+ */
+#define __WASI_RIGHTS_FD_ALLOCATE ((__wasi_rights_t)(1 << 8))
+
+/**
+ * The right to invoke `path_create_directory`.
+ */
+#define __WASI_RIGHTS_PATH_CREATE_DIRECTORY ((__wasi_rights_t)(1 << 9))
+
+/**
+ * If `path_open` is set, the right to invoke `path_open` with `oflags::creat`.
+ */
+#define __WASI_RIGHTS_PATH_CREATE_FILE ((__wasi_rights_t)(1 << 10))
+
+/**
+ * The right to invoke `path_link` with the file descriptor as the
+ * source directory.
+ */
+#define __WASI_RIGHTS_PATH_LINK_SOURCE ((__wasi_rights_t)(1 << 11))
+
+/**
+ * The right to invoke `path_link` with the file descriptor as the
+ * target directory.
+ */
+#define __WASI_RIGHTS_PATH_LINK_TARGET ((__wasi_rights_t)(1 << 12))
+
+/**
+ * The right to invoke `path_open`.
+ */
+#define __WASI_RIGHTS_PATH_OPEN ((__wasi_rights_t)(1 << 13))
+
+/**
+ * The right to invoke `fd_readdir`.
+ */
+#define __WASI_RIGHTS_FD_READDIR ((__wasi_rights_t)(1 << 14))
+
+/**
+ * The right to invoke `path_readlink`.
+ */
+#define __WASI_RIGHTS_PATH_READLINK ((__wasi_rights_t)(1 << 15))
+
+/**
+ * The right to invoke `path_rename` with the file descriptor as the source directory.
+ */
+#define __WASI_RIGHTS_PATH_RENAME_SOURCE ((__wasi_rights_t)(1 << 16))
+
+/**
+ * The right to invoke `path_rename` with the file descriptor as the target directory.
+ */
+#define __WASI_RIGHTS_PATH_RENAME_TARGET ((__wasi_rights_t)(1 << 17))
+
+/**
+ * The right to invoke `path_filestat_get`.
+ */
+#define __WASI_RIGHTS_PATH_FILESTAT_GET ((__wasi_rights_t)(1 << 18))
+
+/**
+ * The right to change a file's size (there is no `path_filestat_set_size`).
+ * If `path_open` is set, includes the right to invoke `path_open` with `oflags::trunc`.
+ */
+#define __WASI_RIGHTS_PATH_FILESTAT_SET_SIZE ((__wasi_rights_t)(1 << 19))
+
+/**
+ * The right to invoke `path_filestat_set_times`.
+ */
+#define __WASI_RIGHTS_PATH_FILESTAT_SET_TIMES ((__wasi_rights_t)(1 << 20))
+
+/**
+ * The right to invoke `fd_filestat_get`.
+ */
+#define __WASI_RIGHTS_FD_FILESTAT_GET ((__wasi_rights_t)(1 << 21))
+
+/**
+ * The right to invoke `fd_filestat_set_size`.
+ */
+#define __WASI_RIGHTS_FD_FILESTAT_SET_SIZE ((__wasi_rights_t)(1 << 22))
+
+/**
+ * The right to invoke `fd_filestat_set_times`.
+ */
+#define __WASI_RIGHTS_FD_FILESTAT_SET_TIMES ((__wasi_rights_t)(1 << 23))
+
+/**
+ * The right to invoke `path_symlink`.
+ */
+#define __WASI_RIGHTS_PATH_SYMLINK ((__wasi_rights_t)(1 << 24))
+
+/**
+ * The right to invoke `path_remove_directory`.
+ */
+#define __WASI_RIGHTS_PATH_REMOVE_DIRECTORY ((__wasi_rights_t)(1 << 25))
+
+/**
+ * The right to invoke `path_unlink_file`.
+ */
+#define __WASI_RIGHTS_PATH_UNLINK_FILE ((__wasi_rights_t)(1 << 26))
+
+/**
+ * If `rights::fd_read` is set, includes the right to invoke `poll_oneoff` to subscribe to `eventtype::fd_read`.
+ * If `rights::fd_write` is set, includes the right to invoke `poll_oneoff` to subscribe to `eventtype::fd_write`.
+ */
+#define __WASI_RIGHTS_POLL_FD_READWRITE ((__wasi_rights_t)(1 << 27))
+
+/**
+ * The right to invoke `sock_shutdown`.
+ */
+#define __WASI_RIGHTS_SOCK_SHUTDOWN ((__wasi_rights_t)(1 << 28))
+
+/**
+ * The right to invoke `sock_accept`.
+ */
+#define __WASI_RIGHTS_SOCK_ACCEPT ((__wasi_rights_t)(1 << 29))
+
+/**
+ * A file descriptor handle.
+ */
+typedef int __wasi_fd_t;
+
+_Static_assert(sizeof(__wasi_fd_t) == 4, "witx calculated size");
+_Static_assert(_Alignof(__wasi_fd_t) == 4, "witx calculated align");
+
+/**
+ * A region of memory for scatter/gather reads.
+ */
+typedef struct __wasi_iovec_t {
+    /**
+     * The address of the buffer to be filled.
+     */
+    uint8_t * buf;
+
+    /**
+     * The length of the buffer to be filled.
+     */
+    __wasi_size_t buf_len;
+
+} __wasi_iovec_t;
+
+_Static_assert(sizeof(__wasi_iovec_t) == 8, "witx calculated size");
+_Static_assert(_Alignof(__wasi_iovec_t) == 4, "witx calculated align");
+_Static_assert(offsetof(__wasi_iovec_t, buf) == 0, "witx calculated offset");
+_Static_assert(offsetof(__wasi_iovec_t, buf_len) == 4, "witx calculated offset");
+
+/**
+ * A region of memory for scatter/gather writes.
+ */
+typedef struct __wasi_ciovec_t {
+    /**
+     * The address of the buffer to be written.
+     */
+    const uint8_t * buf;
+
+    /**
+     * The length of the buffer to be written.
+     */
+    __wasi_size_t buf_len;
+
+} __wasi_ciovec_t;
+
+_Static_assert(sizeof(__wasi_ciovec_t) == 8, "witx calculated size");
+_Static_assert(_Alignof(__wasi_ciovec_t) == 4, "witx calculated align");
+_Static_assert(offsetof(__wasi_ciovec_t, buf) == 0, "witx calculated offset");
+_Static_assert(offsetof(__wasi_ciovec_t, buf_len) == 4, "witx calculated offset");
+
+/**
+ * Relative offset within a file.
+ */
+typedef int64_t __wasi_filedelta_t;
+
+_Static_assert(sizeof(__wasi_filedelta_t) == 8, "witx calculated size");
+_Static_assert(_Alignof(__wasi_filedelta_t) == 8, "witx calculated align");
+
+/**
+ * The position relative to which to set the offset of the file descriptor.
+ */
+typedef uint8_t __wasi_whence_t;
+
+/**
+ * Seek relative to start-of-file.
+ */
+#define __WASI_WHENCE_SET (UINT8_C(0))
+
+/**
+ * Seek relative to current position.
+ */
+#define __WASI_WHENCE_CUR (UINT8_C(1))
+
+/**
+ * Seek relative to end-of-file.
+ */
+#define __WASI_WHENCE_END (UINT8_C(2))
+
+_Static_assert(sizeof(__wasi_whence_t) == 1, "witx calculated size");
+_Static_assert(_Alignof(__wasi_whence_t) == 1, "witx calculated align");
+
+/**
+ * A reference to the offset of a directory entry.
+ * 
+ * The value 0 signifies the start of the directory.
+ */
+typedef uint64_t __wasi_dircookie_t;
+
+_Static_assert(sizeof(__wasi_dircookie_t) == 8, "witx calculated size");
+_Static_assert(_Alignof(__wasi_dircookie_t) == 8, "witx calculated align");
+
+/**
+ * The type for the `dirent::d_namlen` field of `dirent` struct.
+ */
+typedef uint32_t __wasi_dirnamlen_t;
+
+_Static_assert(sizeof(__wasi_dirnamlen_t) == 4, "witx calculated size");
+_Static_assert(_Alignof(__wasi_dirnamlen_t) == 4, "witx calculated align");
+
+/**
+ * File serial number that is unique within its file system.
+ */
+typedef uint64_t __wasi_inode_t;
+
+_Static_assert(sizeof(__wasi_inode_t) == 8, "witx calculated size");
+_Static_assert(_Alignof(__wasi_inode_t) == 8, "witx calculated align");
+
+/**
+ * The type of a file descriptor or file.
+ */
+typedef uint8_t __wasi_filetype_t;
+
+/**
+ * The type of the file descriptor or file is unknown or is different from any of the other types specified.
+ */
+#define __WASI_FILETYPE_UNKNOWN (UINT8_C(0))
+
+/**
+ * The file descriptor or file refers to a block device inode.
+ */
+#define __WASI_FILETYPE_BLOCK_DEVICE (UINT8_C(1))
+
+/**
+ * The file descriptor or file refers to a character device inode.
+ */
+#define __WASI_FILETYPE_CHARACTER_DEVICE (UINT8_C(2))
+
+/**
+ * The file descriptor or file refers to a directory inode.
+ */
+#define __WASI_FILETYPE_DIRECTORY (UINT8_C(3))
+
+/**
+ * The file descriptor or file refers to a regular file inode.
+ */
+#define __WASI_FILETYPE_REGULAR_FILE (UINT8_C(4))
+
+/**
+ * The file descriptor or file refers to a datagram socket.
+ */
+#define __WASI_FILETYPE_SOCKET_DGRAM (UINT8_C(5))
+
+/**
+ * The file descriptor or file refers to a byte-stream socket.
+ */
+#define __WASI_FILETYPE_SOCKET_STREAM (UINT8_C(6))
+
+/**
+ * The file refers to a symbolic link inode.
+ */
+#define __WASI_FILETYPE_SYMBOLIC_LINK (UINT8_C(7))
+
+_Static_assert(sizeof(__wasi_filetype_t) == 1, "witx calculated size");
+_Static_assert(_Alignof(__wasi_filetype_t) == 1, "witx calculated align");
+
+/**
+ * A directory entry.
+ */
+typedef struct __wasi_dirent_t {
+    /**
+     * The offset of the next directory entry stored in this directory.
+     */
+    __wasi_dircookie_t d_next;
+
+    /**
+     * The serial number of the file referred to by this directory entry.
+     */
+    __wasi_inode_t d_ino;
+
+    /**
+     * The length of the name of the directory entry.
+     */
+    __wasi_dirnamlen_t d_namlen;
+
+    /**
+     * The type of the file referred to by this directory entry.
+     */
+    __wasi_filetype_t d_type;
+
+} __wasi_dirent_t;
+
+_Static_assert(sizeof(__wasi_dirent_t) == 24, "witx calculated size");
+_Static_assert(_Alignof(__wasi_dirent_t) == 8, "witx calculated align");
+_Static_assert(offsetof(__wasi_dirent_t, d_next) == 0, "witx calculated offset");
+_Static_assert(offsetof(__wasi_dirent_t, d_ino) == 8, "witx calculated offset");
+_Static_assert(offsetof(__wasi_dirent_t, d_namlen) == 16, "witx calculated offset");
+_Static_assert(offsetof(__wasi_dirent_t, d_type) == 20, "witx calculated offset");
+
+/**
+ * File or memory access pattern advisory information.
+ */
+typedef uint8_t __wasi_advice_t;
+
+/**
+ * The application has no advice to give on its behavior with respect to the specified data.
+ */
+#define __WASI_ADVICE_NORMAL (UINT8_C(0))
+
+/**
+ * The application expects to access the specified data sequentially from lower offsets to higher offsets.
+ */
+#define __WASI_ADVICE_SEQUENTIAL (UINT8_C(1))
+
+/**
+ * The application expects to access the specified data in a random order.
+ */
+#define __WASI_ADVICE_RANDOM (UINT8_C(2))
+
+/**
+ * The application expects to access the specified data in the near future.
+ */
+#define __WASI_ADVICE_WILLNEED (UINT8_C(3))
+
+/**
+ * The application expects that it will not access the specified data in the near future.
+ */
+#define __WASI_ADVICE_DONTNEED (UINT8_C(4))
+
+/**
+ * The application expects to access the specified data once and then not reuse it thereafter.
+ */
+#define __WASI_ADVICE_NOREUSE (UINT8_C(5))
+
+_Static_assert(sizeof(__wasi_advice_t) == 1, "witx calculated size");
+_Static_assert(_Alignof(__wasi_advice_t) == 1, "witx calculated align");
+
+/**
+ * File descriptor flags.
+ */
+typedef uint16_t __wasi_fdflags_t;
+
+/**
+ * Append mode: Data written to the file is always appended to the file's end.
+ */
+#define __WASI_FDFLAGS_APPEND ((__wasi_fdflags_t)(1 << 0))
+
+/**
+ * Write according to synchronized I/O data integrity completion. Only the data stored in the file is synchronized.
+ */
+#define __WASI_FDFLAGS_DSYNC ((__wasi_fdflags_t)(1 << 1))
+
+/**
+ * Non-blocking mode.
+ */
+#define __WASI_FDFLAGS_NONBLOCK ((__wasi_fdflags_t)(1 << 2))
+
+/**
+ * Synchronized read I/O operations.
+ */
+#define __WASI_FDFLAGS_RSYNC ((__wasi_fdflags_t)(1 << 3))
+
+/**
+ * Write according to synchronized I/O file integrity completion. In
+ * addition to synchronizing the data stored in the file, the implementation
+ * may also synchronously update the file's metadata.
+ */
+#define __WASI_FDFLAGS_SYNC ((__wasi_fdflags_t)(1 << 4))
+
+/**
+ * File descriptor attributes.
+ */
+typedef struct __wasi_fdstat_t {
+    /**
+     * File type.
+     */
+    __wasi_filetype_t fs_filetype;
+
+    /**
+     * File descriptor flags.
+     */
+    __wasi_fdflags_t fs_flags;
+
+    /**
+     * Rights that apply to this file descriptor.
+     */
+    __wasi_rights_t fs_rights_base;
+
+    /**
+     * Maximum set of rights that may be installed on new file descriptors that
+     * are created through this file descriptor, e.g., through `path_open`.
+     */
+    __wasi_rights_t fs_rights_inheriting;
+
+} __wasi_fdstat_t;
+
+_Static_assert(sizeof(__wasi_fdstat_t) == 24, "witx calculated size");
+_Static_assert(_Alignof(__wasi_fdstat_t) == 8, "witx calculated align");
+_Static_assert(offsetof(__wasi_fdstat_t, fs_filetype) == 0, "witx calculated offset");
+_Static_assert(offsetof(__wasi_fdstat_t, fs_flags) == 2, "witx calculated offset");
+_Static_assert(offsetof(__wasi_fdstat_t, fs_rights_base) == 8, "witx calculated offset");
+_Static_assert(offsetof(__wasi_fdstat_t, fs_rights_inheriting) == 16, "witx calculated offset");
+
+/**
+ * Identifier for a device containing a file system. Can be used in combination
+ * with `inode` to uniquely identify a file or directory in the filesystem.
+ */
+typedef uint64_t __wasi_device_t;
+
+_Static_assert(sizeof(__wasi_device_t) == 8, "witx calculated size");
+_Static_assert(_Alignof(__wasi_device_t) == 8, "witx calculated align");
+
+/**
+ * Which file time attributes to adjust.
+ */
+typedef uint16_t __wasi_fstflags_t;
+
+/**
+ * Adjust the last data access timestamp to the value stored in `filestat::atim`.
+ */
+#define __WASI_FSTFLAGS_ATIM ((__wasi_fstflags_t)(1 << 0))
+
+/**
+ * Adjust the last data access timestamp to the time of clock `clockid::realtime`.
+ */
+#define __WASI_FSTFLAGS_ATIM_NOW ((__wasi_fstflags_t)(1 << 1))
+
+/**
+ * Adjust the last data modification timestamp to the value stored in `filestat::mtim`.
+ */
+#define __WASI_FSTFLAGS_MTIM ((__wasi_fstflags_t)(1 << 2))
+
+/**
+ * Adjust the last data modification timestamp to the time of clock `clockid::realtime`.
+ */
+#define __WASI_FSTFLAGS_MTIM_NOW ((__wasi_fstflags_t)(1 << 3))
+
+/**
+ * Flags determining the method of how paths are resolved.
+ */
+typedef uint32_t __wasi_lookupflags_t;
+
+/**
+ * As long as the resolved path corresponds to a symbolic link, it is expanded.
+ */
+#define __WASI_LOOKUPFLAGS_SYMLINK_FOLLOW ((__wasi_lookupflags_t)(1 << 0))
+
+/**
+ * Open flags used by `path_open`.
+ */
+typedef uint16_t __wasi_oflags_t;
+
+/**
+ * Create file if it does not exist.
+ */
+#define __WASI_OFLAGS_CREAT ((__wasi_oflags_t)(1 << 0))
+
+/**
+ * Fail if not a directory.
+ */
+#define __WASI_OFLAGS_DIRECTORY ((__wasi_oflags_t)(1 << 1))
+
+/**
+ * Fail if file already exists.
+ */
+#define __WASI_OFLAGS_EXCL ((__wasi_oflags_t)(1 << 2))
+
+/**
+ * Truncate file to size 0.
+ */
+#define __WASI_OFLAGS_TRUNC ((__wasi_oflags_t)(1 << 3))
+
+/**
+ * Number of hard links to an inode.
+ */
+typedef uint64_t __wasi_linkcount_t;
+
+_Static_assert(sizeof(__wasi_linkcount_t) == 8, "witx calculated size");
+_Static_assert(_Alignof(__wasi_linkcount_t) == 8, "witx calculated align");
+
+/**
+ * File attributes.
+ */
+typedef struct __wasi_filestat_t {
+    /**
+     * Device ID of device containing the file.
+     */
+    __wasi_device_t dev;
+
+    /**
+     * File serial number.
+     */
+    __wasi_inode_t ino;
+
+    /**
+     * File type.
+     */
+    __wasi_filetype_t filetype;
+
+    /**
+     * Number of hard links to the file.
+     */
+    __wasi_linkcount_t nlink;
+
+    /**
+     * For regular files, the file size in bytes. For symbolic links, the length in bytes of the pathname contained in the symbolic link.
+     */
+    __wasi_filesize_t size;
+
+    /**
+     * Last data access timestamp.
+     */
+    __wasi_timestamp_t atim;
+
+    /**
+     * Last data modification timestamp.
+     */
+    __wasi_timestamp_t mtim;
+
+    /**
+     * Last file status change timestamp.
+     */
+    __wasi_timestamp_t ctim;
+
+} __wasi_filestat_t;
+
+_Static_assert(sizeof(__wasi_filestat_t) == 64, "witx calculated size");
+_Static_assert(_Alignof(__wasi_filestat_t) == 8, "witx calculated align");
+_Static_assert(offsetof(__wasi_filestat_t, dev) == 0, "witx calculated offset");
+_Static_assert(offsetof(__wasi_filestat_t, ino) == 8, "witx calculated offset");
+_Static_assert(offsetof(__wasi_filestat_t, filetype) == 16, "witx calculated offset");
+_Static_assert(offsetof(__wasi_filestat_t, nlink) == 24, "witx calculated offset");
+_Static_assert(offsetof(__wasi_filestat_t, size) == 32, "witx calculated offset");
+_Static_assert(offsetof(__wasi_filestat_t, atim) == 40, "witx calculated offset");
+_Static_assert(offsetof(__wasi_filestat_t, mtim) == 48, "witx calculated offset");
+_Static_assert(offsetof(__wasi_filestat_t, ctim) == 56, "witx calculated offset");
+
+/**
+ * User-provided value that may be attached to objects that is retained when
+ * extracted from the implementation.
+ */
+typedef uint64_t __wasi_userdata_t;
+
+_Static_assert(sizeof(__wasi_userdata_t) == 8, "witx calculated size");
+_Static_assert(_Alignof(__wasi_userdata_t) == 8, "witx calculated align");
+
+/**
+ * Type of a subscription to an event or its occurrence.
+ */
+typedef uint8_t __wasi_eventtype_t;
+
+/**
+ * The time value of clock `subscription_clock::id` has
+ * reached timestamp `subscription_clock::timeout`.
+ */
+#define __WASI_EVENTTYPE_CLOCK (UINT8_C(0))
+
+/**
+ * File descriptor `subscription_fd_readwrite::file_descriptor` has data
+ * available for reading. This event always triggers for regular files.
+ */
+#define __WASI_EVENTTYPE_FD_READ (UINT8_C(1))
+
+/**
+ * File descriptor `subscription_fd_readwrite::file_descriptor` has capacity
+ * available for writing. This event always triggers for regular files.
+ */
+#define __WASI_EVENTTYPE_FD_WRITE (UINT8_C(2))
+
+_Static_assert(sizeof(__wasi_eventtype_t) == 1, "witx calculated size");
+_Static_assert(_Alignof(__wasi_eventtype_t) == 1, "witx calculated align");
+
+/**
+ * The state of the file descriptor subscribed to with
+ * `eventtype::fd_read` or `eventtype::fd_write`.
+ */
+typedef uint16_t __wasi_eventrwflags_t;
+
+/**
+ * The peer of this socket has closed or disconnected.
+ */
+#define __WASI_EVENTRWFLAGS_FD_READWRITE_HANGUP ((__wasi_eventrwflags_t)(1 << 0))
+
+/**
+ * The contents of an `event` when type is `eventtype::fd_read` or
+ * `eventtype::fd_write`.
+ */
+typedef struct __wasi_event_fd_readwrite_t {
+    /**
+     * The number of bytes available for reading or writing.
+     */
+    __wasi_filesize_t nbytes;
+
+    /**
+     * The state of the file descriptor.
+     */
+    __wasi_eventrwflags_t flags;
+
+} __wasi_event_fd_readwrite_t;
+
+_Static_assert(sizeof(__wasi_event_fd_readwrite_t) == 16, "witx calculated size");
+_Static_assert(_Alignof(__wasi_event_fd_readwrite_t) == 8, "witx calculated align");
+_Static_assert(offsetof(__wasi_event_fd_readwrite_t, nbytes) == 0, "witx calculated offset");
+_Static_assert(offsetof(__wasi_event_fd_readwrite_t, flags) == 8, "witx calculated offset");
+
+/**
+ * An event that occurred.
+ */
+typedef struct __wasi_event_t {
+    /**
+     * User-provided value that got attached to `subscription::userdata`.
+     */
+    __wasi_userdata_t userdata;
+
+    /**
+     * If non-zero, an error that occurred while processing the subscription request.
+     */
+    __wasi_errno_t error;
+
+    /**
+     * The type of event that occured
+     */
+    __wasi_eventtype_t type;
+
+    /**
+     * The contents of the event, if it is an `eventtype::fd_read` or
+     * `eventtype::fd_write`. `eventtype::clock` events ignore this field.
+     */
+    __wasi_event_fd_readwrite_t fd_readwrite;
+
+} __wasi_event_t;
+
+_Static_assert(sizeof(__wasi_event_t) == 32, "witx calculated size");
+_Static_assert(_Alignof(__wasi_event_t) == 8, "witx calculated align");
+_Static_assert(offsetof(__wasi_event_t, userdata) == 0, "witx calculated offset");
+_Static_assert(offsetof(__wasi_event_t, error) == 8, "witx calculated offset");
+_Static_assert(offsetof(__wasi_event_t, type) == 10, "witx calculated offset");
+_Static_assert(offsetof(__wasi_event_t, fd_readwrite) == 16, "witx calculated offset");
+
+/**
+ * Flags determining how to interpret the timestamp provided in
+ * `subscription_clock::timeout`.
+ */
+typedef uint16_t __wasi_subclockflags_t;
+
+/**
+ * If set, treat the timestamp provided in
+ * `subscription_clock::timeout` as an absolute timestamp of clock
+ * `subscription_clock::id`. If clear, treat the timestamp
+ * provided in `subscription_clock::timeout` relative to the
+ * current time value of clock `subscription_clock::id`.
+ */
+#define __WASI_SUBCLOCKFLAGS_SUBSCRIPTION_CLOCK_ABSTIME ((__wasi_subclockflags_t)(1 << 0))
+
+/**
+ * The contents of a `subscription` when type is `eventtype::clock`.
+ */
+typedef struct __wasi_subscription_clock_t {
+    /**
+     * The clock against which to compare the timestamp.
+     */
+    __wasi_clockid_t id;
+
+    /**
+     * The absolute or relative timestamp.
+     */
+    __wasi_timestamp_t timeout;
+
+    /**
+     * The amount of time that the implementation may wait additionally
+     * to coalesce with other events.
+     */
+    __wasi_timestamp_t precision;
+
+    /**
+     * Flags specifying whether the timeout is absolute or relative
+     */
+    __wasi_subclockflags_t flags;
+
+} __wasi_subscription_clock_t;
+
+_Static_assert(sizeof(__wasi_subscription_clock_t) == 32, "witx calculated size");
+_Static_assert(_Alignof(__wasi_subscription_clock_t) == 8, "witx calculated align");
+_Static_assert(offsetof(__wasi_subscription_clock_t, id) == 0, "witx calculated offset");
+_Static_assert(offsetof(__wasi_subscription_clock_t, timeout) == 8, "witx calculated offset");
+_Static_assert(offsetof(__wasi_subscription_clock_t, precision) == 16, "witx calculated offset");
+_Static_assert(offsetof(__wasi_subscription_clock_t, flags) == 24, "witx calculated offset");
+
+/**
+ * The contents of a `subscription` when type is type is
+ * `eventtype::fd_read` or `eventtype::fd_write`.
+ */
+typedef struct __wasi_subscription_fd_readwrite_t {
+    /**
+     * The file descriptor on which to wait for it to become ready for reading or writing.
+     */
+    __wasi_fd_t file_descriptor;
+
+} __wasi_subscription_fd_readwrite_t;
+
+_Static_assert(sizeof(__wasi_subscription_fd_readwrite_t) == 4, "witx calculated size");
+_Static_assert(_Alignof(__wasi_subscription_fd_readwrite_t) == 4, "witx calculated align");
+_Static_assert(offsetof(__wasi_subscription_fd_readwrite_t, file_descriptor) == 0, "witx calculated offset");
+
+/**
+ * The contents of a `subscription`.
+ */
+typedef union __wasi_subscription_u_u_t {
+    __wasi_subscription_clock_t clock;
+    __wasi_subscription_fd_readwrite_t fd_read;
+    __wasi_subscription_fd_readwrite_t fd_write;
+} __wasi_subscription_u_u_t;
+typedef struct __wasi_subscription_u_t {
+    uint8_t tag;
+    __wasi_subscription_u_u_t u;
+} __wasi_subscription_u_t;
+
+_Static_assert(sizeof(__wasi_subscription_u_t) == 40, "witx calculated size");
+_Static_assert(_Alignof(__wasi_subscription_u_t) == 8, "witx calculated align");
+
+/**
+ * Subscription to an event.
+ */
+typedef struct __wasi_subscription_t {
+    /**
+     * User-provided value that is attached to the subscription in the
+     * implementation and returned through `event::userdata`.
+     */
+    __wasi_userdata_t userdata;
+
+    /**
+     * The type of the event to which to subscribe, and its contents
+     */
+    __wasi_subscription_u_t u;
+
+} __wasi_subscription_t;
+
+_Static_assert(sizeof(__wasi_subscription_t) == 48, "witx calculated size");
+_Static_assert(_Alignof(__wasi_subscription_t) == 8, "witx calculated align");
+_Static_assert(offsetof(__wasi_subscription_t, userdata) == 0, "witx calculated offset");
+_Static_assert(offsetof(__wasi_subscription_t, u) == 8, "witx calculated offset");
+
+/**
+ * Exit code generated by a process when exiting.
+ */
+typedef uint32_t __wasi_exitcode_t;
+
+_Static_assert(sizeof(__wasi_exitcode_t) == 4, "witx calculated size");
+_Static_assert(_Alignof(__wasi_exitcode_t) == 4, "witx calculated align");
+
+/**
+ * Flags provided to `sock_recv`.
+ */
+typedef uint16_t __wasi_riflags_t;
+
+/**
+ * Returns the message without removing it from the socket's receive queue.
+ */
+#define __WASI_RIFLAGS_RECV_PEEK ((__wasi_riflags_t)(1 << 0))
+
+/**
+ * On byte-stream sockets, block until the full amount of data can be returned.
+ */
+#define __WASI_RIFLAGS_RECV_WAITALL ((__wasi_riflags_t)(1 << 1))
+
+/**
+ * Flags returned by `sock_recv`.
+ */
+typedef uint16_t __wasi_roflags_t;
+
+/**
+ * Returned by `sock_recv`: Message data has been truncated.
+ */
+#define __WASI_ROFLAGS_RECV_DATA_TRUNCATED ((__wasi_roflags_t)(1 << 0))
+
+/**
+ * Flags provided to `sock_send`. As there are currently no flags
+ * defined, it must be set to zero.
+ */
+typedef uint16_t __wasi_siflags_t;
+
+_Static_assert(sizeof(__wasi_siflags_t) == 2, "witx calculated size");
+_Static_assert(_Alignof(__wasi_siflags_t) == 2, "witx calculated align");
+
+/**
+ * Which channels on a socket to shut down.
+ */
+typedef uint8_t __wasi_sdflags_t;
+
+/**
+ * Disables further receive operations.
+ */
+#define __WASI_SDFLAGS_RD ((__wasi_sdflags_t)(1 << 0))
+
+/**
+ * Disables further send operations.
+ */
+#define __WASI_SDFLAGS_WR ((__wasi_sdflags_t)(1 << 1))
+
+/**
+ * Identifiers for preopened capabilities.
+ */
+typedef uint8_t __wasi_preopentype_t;
+
+/**
+ * A pre-opened directory.
+ */
+#define __WASI_PREOPENTYPE_DIR (UINT8_C(0))
+
+_Static_assert(sizeof(__wasi_preopentype_t) == 1, "witx calculated size");
+_Static_assert(_Alignof(__wasi_preopentype_t) == 1, "witx calculated align");
+
+/**
+ * The contents of a $prestat when type is `preopentype::dir`.
+ */
+typedef struct __wasi_prestat_dir_t {
+    /**
+     * The length of the directory name for use with `fd_prestat_dir_name`.
+     */
+    __wasi_size_t pr_name_len;
+
+} __wasi_prestat_dir_t;
+
+_Static_assert(sizeof(__wasi_prestat_dir_t) == 4, "witx calculated size");
+_Static_assert(_Alignof(__wasi_prestat_dir_t) == 4, "witx calculated align");
+_Static_assert(offsetof(__wasi_prestat_dir_t, pr_name_len) == 0, "witx calculated offset");
+
+/**
+ * Information about a pre-opened capability.
+ */
+typedef union __wasi_prestat_u_t {
+    __wasi_prestat_dir_t dir;
+} __wasi_prestat_u_t;
+typedef struct __wasi_prestat_t {
+    uint8_t tag;
+    __wasi_prestat_u_t u;
+} __wasi_prestat_t;
+
+_Static_assert(sizeof(__wasi_prestat_t) == 8, "witx calculated size");
+_Static_assert(_Alignof(__wasi_prestat_t) == 4, "witx calculated align");
+
+/**
+ * @defgroup wasi_snapshot_preview1
+ * @{
+ */
+
+/**
+ * Read command-line argument data.
+ * The size of the array should match that returned by `args_sizes_get`.
+ * Each argument is expected to be `\0` terminated.
+ */
+__wasi_errno_t __wasi_args_get(
+    uint8_t * * argv,
+    uint8_t * argv_buf
+) __attribute__((__warn_unused_result__));
+/**
+ * Return command-line argument data sizes.
+ * @return
+ * Returns the number of arguments and the size of the argument string
+ * data, or an error.
+ */
+__wasi_errno_t __wasi_args_sizes_get(
+    __wasi_size_t *retptr0,
+    __wasi_size_t *retptr1
+) __attribute__((__warn_unused_result__));
+/**
+ * Read environment variable data.
+ * The sizes of the buffers should match that returned by `environ_sizes_get`.
+ * Key/value pairs are expected to be joined with `=`s, and terminated with `\0`s.
+ */
+__wasi_errno_t __wasi_environ_get(
+    uint8_t * * environ,
+    uint8_t * environ_buf
+) __attribute__((__warn_unused_result__));
+/**
+ * Return environment variable data sizes.
+ * @return
+ * Returns the number of environment variable arguments and the size of the
+ * environment variable data.
+ */
+__wasi_errno_t __wasi_environ_sizes_get(
+    __wasi_size_t *retptr0,
+    __wasi_size_t *retptr1
+) __attribute__((__warn_unused_result__));
+/**
+ * Return the resolution of a clock.
+ * Implementations are required to provide a non-zero value for supported clocks. For unsupported clocks,
+ * return `errno::inval`.
+ * Note: This is similar to `clock_getres` in POSIX.
+ * @return
+ * The resolution of the clock, or an error if one happened.
+ */
+__wasi_errno_t __wasi_clock_res_get(
+    /**
+     * The clock for which to return the resolution.
+     */
+    __wasi_clockid_t id,
+    __wasi_timestamp_t *retptr0
+) __attribute__((__warn_unused_result__));
+/**
+ * Return the time value of a clock.
+ * Note: This is similar to `clock_gettime` in POSIX.
+ * @return
+ * The time value of the clock.
+ */
+__wasi_errno_t __wasi_clock_time_get(
+    /**
+     * The clock for which to return the time.
+     */
+    __wasi_clockid_t id,
+    /**
+     * The maximum lag (exclusive) that the returned time value may have, compared to its actual value.
+     */
+    __wasi_timestamp_t precision,
+    __wasi_timestamp_t *retptr0
+) __attribute__((__warn_unused_result__));
+/**
+ * Provide file advisory information on a file descriptor.
+ * Note: This is similar to `posix_fadvise` in POSIX.
+ */
+__wasi_errno_t __wasi_fd_advise(
+    __wasi_fd_t fd,
+    /**
+     * The offset within the file to which the advisory applies.
+     */
+    __wasi_filesize_t offset,
+    /**
+     * The length of the region to which the advisory applies.
+     */
+    __wasi_filesize_t len,
+    /**
+     * The advice.
+     */
+    __wasi_advice_t advice
+) __attribute__((__warn_unused_result__));
+/**
+ * Force the allocation of space in a file.
+ * Note: This is similar to `posix_fallocate` in POSIX.
+ */
+__wasi_errno_t __wasi_fd_allocate(
+    __wasi_fd_t fd,
+    /**
+     * The offset at which to start the allocation.
+     */
+    __wasi_filesize_t offset,
+    /**
+     * The length of the area that is allocated.
+     */
+    __wasi_filesize_t len
+) __attribute__((__warn_unused_result__));
+/**
+ * Close a file descriptor.
+ * Note: This is similar to `close` in POSIX.
+ */
+__wasi_errno_t __wasi_fd_close(
+    __wasi_fd_t fd
+) __attribute__((__warn_unused_result__));
+/**
+ * Synchronize the data of a file to disk.
+ * Note: This is similar to `fdatasync` in POSIX.
+ */
+__wasi_errno_t __wasi_fd_datasync(
+    __wasi_fd_t fd
+) __attribute__((__warn_unused_result__));
+/**
+ * Get the attributes of a file descriptor.
+ * Note: This returns similar flags to `fsync(fd, F_GETFL)` in POSIX, as well as additional fields.
+ * @return
+ * The buffer where the file descriptor's attributes are stored.
+ */
+__wasi_errno_t __wasi_fd_fdstat_get(
+    __wasi_fd_t fd,
+    __wasi_fdstat_t *retptr0
+) __attribute__((__warn_unused_result__));
+/**
+ * Adjust the flags associated with a file descriptor.
+ * Note: This is similar to `fcntl(fd, F_SETFL, flags)` in POSIX.
+ */
+__wasi_errno_t __wasi_fd_fdstat_set_flags(
+    __wasi_fd_t fd,
+    /**
+     * The desired values of the file descriptor flags.
+     */
+    __wasi_fdflags_t flags
+) __attribute__((__warn_unused_result__));
+/**
+ * Adjust the rights associated with a file descriptor.
+ * This can only be used to remove rights, and returns `errno::notcapable` if called in a way that would attempt to add rights
+ */
+__wasi_errno_t __wasi_fd_fdstat_set_rights(
+    __wasi_fd_t fd,
+    /**
+     * The desired rights of the file descriptor.
+     */
+    __wasi_rights_t fs_rights_base,
+    __wasi_rights_t fs_rights_inheriting
+) __attribute__((__warn_unused_result__));
+/**
+ * Return the attributes of an open file.
+ * @return
+ * The buffer where the file's attributes are stored.
+ */
+__wasi_errno_t __wasi_fd_filestat_get(
+    __wasi_fd_t fd,
+    __wasi_filestat_t *retptr0
+) __attribute__((__warn_unused_result__));
+/**
+ * Adjust the size of an open file. If this increases the file's size, the extra bytes are filled with zeros.
+ * Note: This is similar to `ftruncate` in POSIX.
+ */
+__wasi_errno_t __wasi_fd_filestat_set_size(
+    __wasi_fd_t fd,
+    /**
+     * The desired file size.
+     */
+    __wasi_filesize_t size
+) __attribute__((__warn_unused_result__));
+/**
+ * Adjust the timestamps of an open file or directory.
+ * Note: This is similar to `futimens` in POSIX.
+ */
+__wasi_errno_t __wasi_fd_filestat_set_times(
+    __wasi_fd_t fd,
+    /**
+     * The desired values of the data access timestamp.
+     */
+    __wasi_timestamp_t atim,
+    /**
+     * The desired values of the data modification timestamp.
+     */
+    __wasi_timestamp_t mtim,
+    /**
+     * A bitmask indicating which timestamps to adjust.
+     */
+    __wasi_fstflags_t fst_flags
+) __attribute__((__warn_unused_result__));
+/**
+ * Read from a file descriptor, without using and updating the file descriptor's offset.
+ * Note: This is similar to `preadv` in POSIX.
+ * @return
+ * The number of bytes read.
+ */
+__wasi_errno_t __wasi_fd_pread(
+    __wasi_fd_t fd,
+    /**
+     * List of scatter/gather vectors in which to store data.
+     */
+    const __wasi_iovec_t *iovs,
+    /**
+     * The length of the array pointed to by `iovs`.
+     */
+    size_t iovs_len,
+    /**
+     * The offset within the file at which to read.
+     */
+    __wasi_filesize_t offset,
+    __wasi_size_t *retptr0
+) __attribute__((__warn_unused_result__));
+/**
+ * Return a description of the given preopened file descriptor.
+ * @return
+ * The buffer where the description is stored.
+ */
+__wasi_errno_t __wasi_fd_prestat_get(
+    __wasi_fd_t fd,
+    __wasi_prestat_t *retptr0
+) __attribute__((__warn_unused_result__));
+/**
+ * Return a description of the given preopened file descriptor.
+ */
+__wasi_errno_t __wasi_fd_prestat_dir_name(
+    __wasi_fd_t fd,
+    /**
+     * A buffer into which to write the preopened directory name.
+     */
+    uint8_t * path,
+    __wasi_size_t path_len
+) __attribute__((__warn_unused_result__));
+/**
+ * Write to a file descriptor, without using and updating the file descriptor's offset.
+ * Note: This is similar to `pwritev` in POSIX.
+ * @return
+ * The number of bytes written.
+ */
+__wasi_errno_t __wasi_fd_pwrite(
+    __wasi_fd_t fd,
+    /**
+     * List of scatter/gather vectors from which to retrieve data.
+     */
+    const __wasi_ciovec_t *iovs,
+    /**
+     * The length of the array pointed to by `iovs`.
+     */
+    size_t iovs_len,
+    /**
+     * The offset within the file at which to write.
+     */
+    __wasi_filesize_t offset,
+    __wasi_size_t *retptr0
+) __attribute__((__warn_unused_result__));
+/**
+ * Read from a file descriptor.
+ * Note: This is similar to `readv` in POSIX.
+ * @return
+ * The number of bytes read.
+ */
+__wasi_errno_t __wasi_fd_read(
+    __wasi_fd_t fd,
+    /**
+     * List of scatter/gather vectors to which to store data.
+     */
+    const __wasi_iovec_t *iovs,
+    /**
+     * The length of the array pointed to by `iovs`.
+     */
+    size_t iovs_len,
+    __wasi_size_t *retptr0
+) __attribute__((__warn_unused_result__));
+/**
+ * Read directory entries from a directory.
+ * When successful, the contents of the output buffer consist of a sequence of
+ * directory entries. Each directory entry consists of a `dirent` object,
+ * followed by `dirent::d_namlen` bytes holding the name of the directory
+ * entry.
+ * This function fills the output buffer as much as possible, potentially
+ * truncating the last directory entry. This allows the caller to grow its
+ * read buffer size in case it's too small to fit a single large directory
+ * entry, or skip the oversized directory entry.
+ * @return
+ * The number of bytes stored in the read buffer. If less than the size of the read buffer, the end of the directory has been reached.
+ */
+__wasi_errno_t __wasi_fd_readdir(
+    __wasi_fd_t fd,
+    /**
+     * The buffer where directory entries are stored
+     */
+    uint8_t * buf,
+    __wasi_size_t buf_len,
+    /**
+     * The location within the directory to start reading
+     */
+    __wasi_dircookie_t cookie,
+    __wasi_size_t *retptr0
+) __attribute__((__warn_unused_result__));
+/**
+ * Atomically replace a file descriptor by renumbering another file descriptor.
+ * Due to the strong focus on thread safety, this environment does not provide
+ * a mechanism to duplicate or renumber a file descriptor to an arbitrary
+ * number, like `dup2()`. This would be prone to race conditions, as an actual
+ * file descriptor with the same number could be allocated by a different
+ * thread at the same time.
+ * This function provides a way to atomically renumber file descriptors, which
+ * would disappear if `dup2()` were to be removed entirely.
+ */
+__wasi_errno_t __wasi_fd_renumber(
+    __wasi_fd_t fd,
+    /**
+     * The file descriptor to overwrite.
+     */
+    __wasi_fd_t to
+) __attribute__((__warn_unused_result__));
+/**
+ * Move the offset of a file descriptor.
+ * Note: This is similar to `lseek` in POSIX.
+ * @return
+ * The new offset of the file descriptor, relative to the start of the file.
+ */
+__wasi_errno_t __wasi_fd_seek(
+    __wasi_fd_t fd,
+    /**
+     * The number of bytes to move.
+     */
+    __wasi_filedelta_t offset,
+    /**
+     * The base from which the offset is relative.
+     */
+    __wasi_whence_t whence,
+    __wasi_filesize_t *retptr0
+) __attribute__((__warn_unused_result__));
+/**
+ * Synchronize the data and metadata of a file to disk.
+ * Note: This is similar to `fsync` in POSIX.
+ */
+__wasi_errno_t __wasi_fd_sync(
+    __wasi_fd_t fd
+) __attribute__((__warn_unused_result__));
+/**
+ * Return the current offset of a file descriptor.
+ * Note: This is similar to `lseek(fd, 0, SEEK_CUR)` in POSIX.
+ * @return
+ * The current offset of the file descriptor, relative to the start of the file.
+ */
+__wasi_errno_t __wasi_fd_tell(
+    __wasi_fd_t fd,
+    __wasi_filesize_t *retptr0
+) __attribute__((__warn_unused_result__));
+/**
+ * Write to a file descriptor.
+ * Note: This is similar to `writev` in POSIX.
+ */
+__wasi_errno_t __wasi_fd_write(
+    __wasi_fd_t fd,
+    /**
+     * List of scatter/gather vectors from which to retrieve data.
+     */
+    const __wasi_ciovec_t *iovs,
+    /**
+     * The length of the array pointed to by `iovs`.
+     */
+    size_t iovs_len,
+    __wasi_size_t *retptr0
+) __attribute__((__warn_unused_result__));
+/**
+ * Create a directory.
+ * Note: This is similar to `mkdirat` in POSIX.
+ */
+__wasi_errno_t __wasi_path_create_directory(
+    __wasi_fd_t fd,
+    /**
+     * The path at which to create the directory.
+     */
+    const char *path
+) __attribute__((__warn_unused_result__));
+/**
+ * Return the attributes of a file or directory.
+ * Note: This is similar to `stat` in POSIX.
+ * @return
+ * The buffer where the file's attributes are stored.
+ */
+__wasi_errno_t __wasi_path_filestat_get(
+    __wasi_fd_t fd,
+    /**
+     * Flags determining the method of how the path is resolved.
+     */
+    __wasi_lookupflags_t flags,
+    /**
+     * The path of the file or directory to inspect.
+     */
+    const char *path,
+    __wasi_filestat_t *retptr0
+) __attribute__((__warn_unused_result__));
+/**
+ * Adjust the timestamps of a file or directory.
+ * Note: This is similar to `utimensat` in POSIX.
+ */
+__wasi_errno_t __wasi_path_filestat_set_times(
+    __wasi_fd_t fd,
+    /**
+     * Flags determining the method of how the path is resolved.
+     */
+    __wasi_lookupflags_t flags,
+    /**
+     * The path of the file or directory to operate on.
+     */
+    const char *path,
+    /**
+     * The desired values of the data access timestamp.
+     */
+    __wasi_timestamp_t atim,
+    /**
+     * The desired values of the data modification timestamp.
+     */
+    __wasi_timestamp_t mtim,
+    /**
+     * A bitmask indicating which timestamps to adjust.
+     */
+    __wasi_fstflags_t fst_flags
+) __attribute__((__warn_unused_result__));
+/**
+ * Create a hard link.
+ * Note: This is similar to `linkat` in POSIX.
+ */
+__wasi_errno_t __wasi_path_link(
+    __wasi_fd_t old_fd,
+    /**
+     * Flags determining the method of how the path is resolved.
+     */
+    __wasi_lookupflags_t old_flags,
+    /**
+     * The source path from which to link.
+     */
+    const char *old_path,
+    /**
+     * The working directory at which the resolution of the new path starts.
+     */
+    __wasi_fd_t new_fd,
+    /**
+     * The destination path at which to create the hard link.
+     */
+    const char *new_path
+) __attribute__((__warn_unused_result__));
+/**
+ * Open a file or directory.
+ * The returned file descriptor is not guaranteed to be the lowest-numbered
+ * file descriptor not currently open; it is randomized to prevent
+ * applications from depending on making assumptions about indexes, since this
+ * is error-prone in multi-threaded contexts. The returned file descriptor is
+ * guaranteed to be less than 2**31.
+ * Note: This is similar to `openat` in POSIX.
+ * @return
+ * The file descriptor of the file that has been opened.
+ */
+__wasi_errno_t __wasi_path_open(
+    __wasi_fd_t fd,
+    /**
+     * Flags determining the method of how the path is resolved.
+     */
+    __wasi_lookupflags_t dirflags,
+    /**
+     * The relative path of the file or directory to open, relative to the
+     * `path_open::fd` directory.
+     */
+    const char *path,
+    /**
+     * The method by which to open the file.
+     */
+    __wasi_oflags_t oflags,
+    /**
+     * The initial rights of the newly created file descriptor. The
+     * implementation is allowed to return a file descriptor with fewer rights
+     * than specified, if and only if those rights do not apply to the type of
+     * file being opened.
+     * The *base* rights are rights that will apply to operations using the file
+     * descriptor itself, while the *inheriting* rights are rights that apply to
+     * file descriptors derived from it.
+     */
+    __wasi_rights_t fs_rights_base,
+    __wasi_rights_t fs_rights_inheriting,
+    __wasi_fdflags_t fdflags,
+    __wasi_fd_t *retptr0
+) __attribute__((__warn_unused_result__));
+/**
+ * Read the contents of a symbolic link.
+ * Note: This is similar to `readlinkat` in POSIX.
+ * @return
+ * The number of bytes placed in the buffer.
+ */
+__wasi_errno_t __wasi_path_readlink(
+    __wasi_fd_t fd,
+    /**
+     * The path of the symbolic link from which to read.
+     */
+    const char *path,
+    /**
+     * The buffer to which to write the contents of the symbolic link.
+     */
+    uint8_t * buf,
+    __wasi_size_t buf_len,
+    __wasi_size_t *retptr0
+) __attribute__((__warn_unused_result__));
+/**
+ * Remove a directory.
+ * Return `errno::notempty` if the directory is not empty.
+ * Note: This is similar to `unlinkat(fd, path, AT_REMOVEDIR)` in POSIX.
+ */
+__wasi_errno_t __wasi_path_remove_directory(
+    __wasi_fd_t fd,
+    /**
+     * The path to a directory to remove.
+     */
+    const char *path
+) __attribute__((__warn_unused_result__));
+/**
+ * Rename a file or directory.
+ * Note: This is similar to `renameat` in POSIX.
+ */
+__wasi_errno_t __wasi_path_rename(
+    __wasi_fd_t fd,
+    /**
+     * The source path of the file or directory to rename.
+     */
+    const char *old_path,
+    /**
+     * The working directory at which the resolution of the new path starts.
+     */
+    __wasi_fd_t new_fd,
+    /**
+     * The destination path to which to rename the file or directory.
+     */
+    const char *new_path
+) __attribute__((__warn_unused_result__));
+/**
+ * Create a symbolic link.
+ * Note: This is similar to `symlinkat` in POSIX.
+ */
+__wasi_errno_t __wasi_path_symlink(
+    /**
+     * The contents of the symbolic link.
+     */
+    const char *old_path,
+    __wasi_fd_t fd,
+    /**
+     * The destination path at which to create the symbolic link.
+     */
+    const char *new_path
+) __attribute__((__warn_unused_result__));
+/**
+ * Unlink a file.
+ * Return `errno::isdir` if the path refers to a directory.
+ * Note: This is similar to `unlinkat(fd, path, 0)` in POSIX.
+ */
+__wasi_errno_t __wasi_path_unlink_file(
+    __wasi_fd_t fd,
+    /**
+     * The path to a file to unlink.
+     */
+    const char *path
+) __attribute__((__warn_unused_result__));
+/**
+ * Concurrently poll for the occurrence of a set of events.
+ * @return
+ * The number of events stored.
+ */
+__wasi_errno_t __wasi_poll_oneoff(
+    /**
+     * The events to which to subscribe.
+     */
+    const __wasi_subscription_t * in,
+    /**
+     * The events that have occurred.
+     */
+    __wasi_event_t * out,
+    /**
+     * Both the number of subscriptions and events.
+     */
+    __wasi_size_t nsubscriptions,
+    __wasi_size_t *retptr0
+) __attribute__((__warn_unused_result__));
+/**
+ * Terminate the process normally. An exit code of 0 indicates successful
+ * termination of the program. The meanings of other values is dependent on
+ * the environment.
+ */
+_Noreturn void __wasi_proc_exit(
+    /**
+     * The exit code returned by the process.
+     */
+    __wasi_exitcode_t rval
+);
+/**
+ * Temporarily yield execution of the calling thread.
+ * Note: This is similar to `sched_yield` in POSIX.
+ */
+__wasi_errno_t __wasi_sched_yield(
+    void
+) __attribute__((__warn_unused_result__));
+/**
+ * Write high-quality random data into a buffer.
+ * This function blocks when the implementation is unable to immediately
+ * provide sufficient high-quality random data.
+ * This function may execute slowly, so when large mounts of random data are
+ * required, it's advisable to use this function to seed a pseudo-random
+ * number generator, rather than to provide the random data directly.
+ */
+__wasi_errno_t __wasi_random_get(
+    /**
+     * The buffer to fill with random data.
+     */
+    uint8_t * buf,
+    __wasi_size_t buf_len
+) __attribute__((__warn_unused_result__));
+/**
+ * Accept a new incoming connection.
+ * Note: This is similar to `accept` in POSIX.
+ * @return
+ * New socket connection
+ */
+__wasi_errno_t __wasi_sock_accept(
+    /**
+     * The listening socket.
+     */
+    __wasi_fd_t fd,
+    /**
+     * The desired values of the file descriptor flags.
+     */
+    __wasi_fdflags_t flags,
+    __wasi_fd_t *retptr0
+) __attribute__((__warn_unused_result__));
+/**
+ * Receive a message from a socket.
+ * Note: This is similar to `recv` in POSIX, though it also supports reading
+ * the data into multiple buffers in the manner of `readv`.
+ * @return
+ * Number of bytes stored in ri_data and message flags.
+ */
+__wasi_errno_t __wasi_sock_recv(
+    __wasi_fd_t fd,
+    /**
+     * List of scatter/gather vectors to which to store data.
+     */
+    const __wasi_iovec_t *ri_data,
+    /**
+     * The length of the array pointed to by `ri_data`.
+     */
+    size_t ri_data_len,
+    /**
+     * Message flags.
+     */
+    __wasi_riflags_t ri_flags,
+    __wasi_size_t *retptr0,
+    __wasi_roflags_t *retptr1
+) __attribute__((__warn_unused_result__));
+/**
+ * Send a message on a socket.
+ * Note: This is similar to `send` in POSIX, though it also supports writing
+ * the data from multiple buffers in the manner of `writev`.
+ * @return
+ * Number of bytes transmitted.
+ */
+__wasi_errno_t __wasi_sock_send(
+    __wasi_fd_t fd,
+    /**
+     * List of scatter/gather vectors to which to retrieve data
+     */
+    const __wasi_ciovec_t *si_data,
+    /**
+     * The length of the array pointed to by `si_data`.
+     */
+    size_t si_data_len,
+    /**
+     * Message flags.
+     */
+    __wasi_siflags_t si_flags,
+    __wasi_size_t *retptr0
+) __attribute__((__warn_unused_result__));
+/**
+ * Shut down socket send and receive channels.
+ * Note: This is similar to `shutdown` in POSIX.
+ */
+__wasi_errno_t __wasi_sock_shutdown(
+    __wasi_fd_t fd,
+    /**
+     * Which channels on the socket to shut down.
+     */
+    __wasi_sdflags_t how
+) __attribute__((__warn_unused_result__));
+/** @} */
+
+#ifdef _REENTRANT
+/**
+ * Request a new thread to be created by the host.
+ *
+ * The host will create a new instance of the current module sharing its
+ * memory, find an exported entry function--`wasi_thread_start`--, and call the
+ * entry function with `start_arg` in the new thread.
+ *
+ * @see https://github.com/WebAssembly/wasi-threads/#readme
+ */
+__wasi_errno_t __wasi_thread_spawn(
+    /**
+     * A pointer to an opaque struct to be passed to the module's entry
+     * function.
+     */
+    void *start_arg
+)  __attribute__((__warn_unused_result__));
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/libc-bottom-half/headers/public/wasi/libc-environ.h b/libc-bottom-half/headers/public/wasi/libc-environ.h
new file mode 100644
index 0000000..f84ba8e
--- /dev/null
+++ b/libc-bottom-half/headers/public/wasi/libc-environ.h
@@ -0,0 +1,36 @@
+#ifndef __wasi_libc_environ_h
+#define __wasi_libc_environ_h
+
+/// This header file is a WASI-libc-specific interface, and is not needed by
+/// most programs. Most programs should just use the standard `getenv` and
+/// related APIs, which take care of all of the details automatically.
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/// Initialize the global environment variable state. Only needs to be
+/// called once; most users should call `__wasilibc_ensure_environ` instead.
+void __wasilibc_initialize_environ(void);
+
+/// If `__wasilibc_initialize_environ` has not yet been called, call it.
+void __wasilibc_ensure_environ(void);
+
+/// De-initialize the global environment variable state, so that subsequent
+/// calls to `__wasilibc_ensure_environ` call `__wasilibc_initialize_environ`.
+void __wasilibc_deinitialize_environ(void);
+
+/// Call `__wasilibc_initialize_environ` only if `environ` and `_environ` are
+/// referenced in the program.
+void __wasilibc_maybe_reinitialize_environ_eagerly(void);
+
+/// Return the value of the `environ` variable. Using `environ` directly
+/// requires eager initialization of the environment variables. Using this
+/// function instead of `environ` allows initialization to happen lazily.
+char **__wasilibc_get_environ(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/libc-bottom-half/headers/public/wasi/libc-find-relpath.h b/libc-bottom-half/headers/public/wasi/libc-find-relpath.h
new file mode 100644
index 0000000..32dbb03
--- /dev/null
+++ b/libc-bottom-half/headers/public/wasi/libc-find-relpath.h
@@ -0,0 +1,79 @@
+#ifndef __wasi_libc_find_relpath_h
+#define __wasi_libc_find_relpath_h
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * Look up the given `path`, relative to the cwd, in the preopened directory
+ * map. If a suitable entry is found, then the file descriptor for that entry
+ * is returned. Additionally the absolute path of the directory's file
+ * descriptor is returned in `abs_prefix` and the relative portion that needs
+ * to be opened is stored in `*relative_path`.
+ *
+ * The `relative_path` argument must be a pointer to a buffer valid  for
+ * `relative_path_len` bytes, and this may be used as storage for the relative
+ * portion of the path being returned through `*relative_path`.
+ *
+ * See documentation on `__wasilibc_find_abspath` for more info about what the
+ * paths look like.
+ *
+ * Returns -1 on failure. Errno is set to either:
+ *
+ *  * ENOMEM - failed to allocate memory for internal routines.
+ *  * ENOENT - the `path` could not be found relative to any preopened dir.
+ *  * ERANGE - the `relative_path` buffer is too small to hold the relative path.
+ */
+int __wasilibc_find_relpath(const char *path,
+                            const char **__restrict__ abs_prefix,
+                            char **relative_path,
+                            size_t relative_path_len);
+
+/**
+ * Look up the given `path`, which is interpreted as absolute, in the preopened
+ * directory map. If a suitable entry is found, then the file descriptor for
+ * that entry is returned. Additionally the relative portion of the path to
+ * where the fd is opened is returned through `relative_path`, the absolute
+ * prefix which was matched is stored to `abs_prefix`, and `relative_path` may
+ * be an interior pointer to the `abspath` string.
+ *
+ * The `abs_prefix` returned string will not contain a leading `/`. Note that
+ * this may be the empty string. Additionally the returned `relative_path` will
+ * not contain a leading `/`. The `relative_path` return will not return an
+ * empty string, it will return `"."` instead if it would otherwise do so.
+ *
+ * Returns -1 on failure. Errno is set to either:
+ *
+ *  * ENOMEM - failed to allocate memory for internal routines.
+ *  * ENOENT - the `path` could not be found relative to any preopened dir.
+ */
+int __wasilibc_find_abspath(const char *abspath,
+                            const char **__restrict__ abs_prefix,
+                            const char **__restrict__ relative_path);
+
+/**
+ * Same as `__wasilibc_find_relpath`, except that this function will interpret
+ * `relative` as a malloc'd buffer that will be `realloc`'d to the appropriate
+ * size to contain the relative path.
+ *
+ * Note that this is a weak symbol and if it's not defined you can use
+ * `__wasilibc_find_relpath`. The weak-nature of this symbols means that if it's
+ * not otherwise included in the compilation then `chdir` wasn't used an there's
+ * no need for this symbol.
+ *
+ * See documentation on `__wasilibc_find_relpath` for more information.
+ */
+int __wasilibc_find_relpath_alloc(
+    const char *path,
+    const char **abs,
+    char **relative,
+    size_t *relative_len,
+    int can_realloc
+) __attribute__((__weak__));
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/libc-bottom-half/headers/public/wasi/libc-nocwd.h b/libc-bottom-half/headers/public/wasi/libc-nocwd.h
new file mode 100644
index 0000000..a988503
--- /dev/null
+++ b/libc-bottom-half/headers/public/wasi/libc-nocwd.h
@@ -0,0 +1,58 @@
+#ifndef __wasi_libc_nocwd_h
+#define __wasi_libc_nocwd_h
+
+/*
+ * In order to support AT_FDCWD, we need to wrap the *at functions to handle
+ * it by calling back into the non-at versions which perform libpreopen
+ * queries. These __wasilibc_nocwd_* forms are the underlying calls which
+ * assume AT_FDCWD has already been resolved.
+ */
+
+#define __need_size_t
+#include <stddef.h>
+#include <__typedef_ssize_t.h>
+#include <__typedef_mode_t.h>
+#include <__typedef_DIR.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct timespec;
+struct stat;
+struct dirent;
+
+int __wasilibc_nocwd___wasilibc_unlinkat(int, const char *)
+    __attribute__((__warn_unused_result__));
+int __wasilibc_nocwd___wasilibc_rmdirat(int, const char *)
+    __attribute__((__warn_unused_result__));
+int __wasilibc_nocwd_linkat(int, const char *, int, const char *, int)
+    __attribute__((__warn_unused_result__));
+int __wasilibc_nocwd_symlinkat(const char *, int, const char *)
+    __attribute__((__warn_unused_result__));
+ssize_t __wasilibc_nocwd_readlinkat(int, const char *__restrict, char *__restrict, size_t)
+    __attribute__((__warn_unused_result__));
+int __wasilibc_nocwd_faccessat(int, const char *, int, int)
+    __attribute__((__warn_unused_result__));
+int __wasilibc_nocwd_renameat(int, const char *, int, const char *)
+    __attribute__((__warn_unused_result__));
+int __wasilibc_nocwd_openat_nomode(int, const char *, int)
+    __attribute__((__warn_unused_result__));
+int __wasilibc_nocwd_fstatat(int, const char *__restrict, struct stat *__restrict, int)
+    __attribute__((__warn_unused_result__));
+int __wasilibc_nocwd_mkdirat_nomode(int, const char *)
+    __attribute__((__warn_unused_result__));
+int __wasilibc_nocwd_utimensat(int, const char *, const struct timespec [2], int)
+    __attribute__((__warn_unused_result__));
+DIR *__wasilibc_nocwd_opendirat(int, const char *)
+    __attribute__((__warn_unused_result__));
+int __wasilibc_nocwd_scandirat(int, const char *, struct dirent ***,
+                               int (*)(const struct dirent *),
+                               int (*)(const struct dirent **, const struct dirent **))
+    __attribute__((__warn_unused_result__));
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/libc-bottom-half/headers/public/wasi/libc.h b/libc-bottom-half/headers/public/wasi/libc.h
new file mode 100644
index 0000000..b50518b
--- /dev/null
+++ b/libc-bottom-half/headers/public/wasi/libc.h
@@ -0,0 +1,65 @@
+#ifndef __wasi_libc_h
+#define __wasi_libc_h
+
+#include <__typedef_off_t.h>
+#include <__struct_timespec.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct stat;
+struct timespec;
+
+/// Register the given pre-opened file descriptor under the given path.
+///
+/// This function does not take ownership of `prefix` (it makes its own copy).
+int __wasilibc_register_preopened_fd(int fd, const char *prefix);
+
+/// Renumber `fd` to `newfd`; similar to `dup2` but does a move rather than a
+/// copy.
+int __wasilibc_fd_renumber(int fd, int newfd)
+    __attribute__((__warn_unused_result__));
+
+/// Like `unlinkat`, but without depending on `__wasi_path_remove_directory`.
+int __wasilibc_unlinkat(int fd, const char *path)
+    __attribute__((__warn_unused_result__));
+
+/// An `*at` version of rmdir.
+int __wasilibc_rmdirat(int fd, const char *path)
+    __attribute__((__warn_unused_result__));
+
+/// Like `open`, but without the varargs in the signature.
+int __wasilibc_open_nomode(const char *path, int oflag);
+
+/// Like `openat`, but without the varargs in the signature.
+int __wasilibc_openat_nomode(int fd, const char *path, int oflag);
+
+/// Return the current file offset. Like `lseek(fd, 0, SEEK_CUR)`, but without
+/// depending on `lseek`.
+off_t __wasilibc_tell(int fd)
+    __attribute__((__warn_unused_result__));
+
+/* Non-`at` forms of various `*at` functions. */
+int __wasilibc_access(const char *pathname, int mode, int flags)
+    __attribute__((__warn_unused_result__));
+int __wasilibc_stat(const char *__restrict pathname, struct stat *__restrict statbuf, int flags)
+    __attribute__((__warn_unused_result__));
+int __wasilibc_utimens(const char *pathname, const struct timespec times[2], int flags)
+    __attribute__((__warn_unused_result__));
+int __wasilibc_link(const char *oldpath, const char *newpath, int flags)
+    __attribute__((__warn_unused_result__));
+int __wasilibc_link_oldat(int olddirfd, const char *oldpath, const char *newpath, int flags)
+    __attribute__((__warn_unused_result__));
+int __wasilibc_link_newat(const char *oldpath, int newdirfd, const char *newpath, int flags)
+    __attribute__((__warn_unused_result__));
+int __wasilibc_rename_oldat(int olddirfd, const char *oldpath, const char *newpath)
+    __attribute__((__warn_unused_result__));
+int __wasilibc_rename_newat(const char *oldpath, int newdirfd, const char *newpath)
+    __attribute__((__warn_unused_result__));
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif