syscalls(2)
NAME
syscalls - overview of MontaukOS system calls
DESCRIPTION
MontaukOS provides 150 system calls (numbers 0-149, sparsely
assigned -- not every number in the range is in use) for
userspace programs. Syscalls use the x86-64 SYSCALL instruction
with the following register convention:
RAX Syscall number (in) / return value (out)
RDI Argument 1
RSI Argument 2
RDX Argument 3
R10 Argument 4
R8 Argument 5
R9 Argument 6
Include <Api/Syscall.hpp> for the numeric SYS_* constants and
ABI structs, and <montauk/syscall.h> for typed wrappers in the
montauk:: namespace. This page groups syscalls the same way the
kernel source does (one subsystem header per group).
PROCESS MANAGEMENT
SYS_EXIT (0)
Terminate the calling process.
[[noreturn]] void montauk::exit(int code = 0);
SYS_YIELD (1)
Yield the remainder of the time slice.
void montauk::yield();
SYS_SLEEP_MS (2)
Sleep for at least the given number of milliseconds.
void montauk::sleep_ms(uint64_t ms);
SYS_GETPID (3)
Return the PID of the calling process.
int montauk::getpid();
SYS_SPAWN (20)
Spawn a new process from an ELF binary on the VFS.
int montauk::spawn(const char* path, const char* args = nullptr);
SYS_WAITPID (23)
Block until the given process has exited.
void montauk::waitpid(int pid);
SYS_GETARGS (25)
Get the argument string passed to this process at spawn time.
int montauk::getargs(char* buf, uint64_t maxLen);
SYS_PROCLIST (61)
List running processes (pid, parent, state, name, heap usage,
accumulated CPU time).
int montauk::proclist(montauk::abi::ProcInfo* buf, int max);
SYS_KILL (62)
Terminate another process by PID.
int montauk::kill(int pid);
SYS_CHDIR (96)
Change the calling process's current working directory.
int montauk::chdir(const char* path);
SYS_GETCWD (95)
Get the calling process's current working directory.
int montauk::getcwd(char* buf, uint64_t maxLen);
SYS_SETUSER (92)
Associate a process with a logged-in user name (used by login/session
management).
int montauk::setuser(int pid, const char* name);
SYS_GETUSER (93)
Get the user name associated with the calling process.
int montauk::getuser(char* buf, uint64_t maxLen);
THREADING
Threads share the spawning process's address space and heap
(see montauk/heap.h for the heap lock). Declared in
montauk/thread.h.
SYS_THREAD_SPAWN (130)
Spawn a new thread in the calling process. Returns a positive
TID on success, -1 on failure.
int montauk::thread_spawn(ThreadEntry entry, void* arg,
uint64_t stack_bytes = 0);
SYS_THREAD_EXIT (131)
Terminate only the calling thread. If it is the main thread,
the whole process exits.
[[noreturn]] void montauk::thread_exit(int code = 0);
SYS_THREAD_JOIN (132)
Block until the given TID exits, then reclaim its kernel state.
int montauk::thread_join(int tid, int* out_code = nullptr);
SYS_THREAD_SELF (133)
Return the calling thread's TID (equals getpid() for the main
thread).
int montauk::thread_self();
CONSOLE I/O
SYS_PRINT (4)
Write a null-terminated string to the terminal.
void montauk::print(const char* text);
SYS_PUTCHAR (5)
Write a single character to the terminal.
void montauk::putchar(char c);
FILE I/O
SYS_OPEN (6)
Open a file. Returns a handle or negative on error.
int montauk::open(const char* path);
SYS_READ (7)
Read bytes from a file at a given offset.
int montauk::read(int h, uint8_t* buf, uint64_t off, uint64_t sz);
SYS_GETSIZE (8)
Get the size of an open file in bytes.
uint64_t montauk::getsize(int handle);
SYS_CLOSE (9)
Close a file handle.
void montauk::close(int handle);
SYS_READDIR (10)
List directory entries (max 256 per call for VFS directories,
128 for driver-backed listings such as 0:/os/). For larger
directories use SYS_READDIR_AT.
int montauk::readdir(const char* path, const char** names, int max);
SYS_READDIR_AT (136)
Paginated directory read. Returns entries starting at
startIndex; call repeatedly with startIndex advanced by the
returned count until it returns 0 to enumerate directories of
any size.
int montauk::readdir_at(const char* path, const char** names,
int max, int startIndex);
SYS_FWRITE (41)
Write bytes to a file at a given offset.
int montauk::fwrite(int handle, const uint8_t* buf,
uint64_t offset, uint64_t size);
SYS_FCREATE (42)
Create a new file on the target volume. Returns a handle or
negative on error.
int montauk::fcreate(const char* path);
SYS_FDELETE (77)
Delete a file.
int montauk::fdelete(const char* path);
SYS_FMKDIR (78)
Create a directory.
int montauk::fmkdir(const char* path);
SYS_FRENAME (94)
Rename or move a file/directory (used as the basis for file
manager move operations).
int montauk::frename(const char* oldPath, const char* newPath);
SYS_DRIVELIST (79)
List mounted drive numbers.
int montauk::drivelist(int* outDrives, int max);
SYS_DRIVELABEL (124)
Get the volume label of a drive.
int montauk::drivelabel(int drive, char* outLabel, int maxLen);
SYS_DRIVEKIND (127)
Get the block device kind backing a drive: 0=unknown/ramdisk,
1=SATA, 2=SATAPI, 3=NVMe, 4=USB mass storage.
int montauk::drivekind(int drive);
MEMORY
SYS_ALLOC (11)
Map zeroed pages into the process address space.
void* montauk::alloc(uint64_t size);
SYS_FREE (12)
Reserved (currently a no-op).
void montauk::free(void* ptr);
SYS_MEMSTATS (67)
Get kernel-wide physical memory usage (total/free/used bytes,
page size).
void montauk::memstats(montauk::abi::MemStats* out);
TIMEKEEPING
SYS_GETTICKS (13)
Get APIC timer ticks since boot.
uint64_t montauk::get_ticks();
SYS_GETMILLISECONDS (14)
Get milliseconds elapsed since boot.
uint64_t montauk::get_milliseconds();
SYS_GETTIME (28)
Get the current wall-clock date and time (UTC).
Fills a montauk::abi::DateTime struct with Year, Month, Day,
Hour, Minute, and Second fields.
void montauk::gettime(montauk::abi::DateTime* out);
SYS_SETTZ (90)
Set the process/system timezone offset, in minutes from UTC.
void montauk::settz(int offset_minutes);
SYS_GETTZ (91)
Get the current timezone offset, in minutes from UTC.
int montauk::gettz();
SYSTEM
SYS_GETINFO (15)
Get OS name, version string, API version, max process count,
and the monotonic kernel build number.
void montauk::get_info(montauk::abi::SysInfo* info);
KEYBOARD
SYS_ISKEYAVAILABLE (16)
Check if a key event is pending (non-blocking).
bool montauk::is_key_available();
SYS_GETKEY (17)
Get the next key event (press or release).
void montauk::getkey(montauk::abi::KeyEvent* out);
SYS_GETCHAR (18)
Block until a printable character is typed.
char montauk::getchar();
SYS_INPUT_WAIT (123)
Block until the input serial number differs from
observedSerial or the timeout elapses; used to sleep
efficiently between input-driven redraws.
uint64_t montauk::input_wait(uint64_t observedSerial, uint64_t timeoutMs);
MOUSE
SYS_MOUSESTATE (47)
Get the current mouse position, scroll delta, and button mask.
void montauk::mouse_state(montauk::abi::MouseState* out);
SYS_SETMOUSEBOUNDS (48)
Set the maximum X/Y the mouse cursor may reach (e.g. framebuffer
dimensions).
void montauk::set_mouse_bounds(int32_t maxX, int32_t maxY);
NETWORKING
SYS_PING (19)
Send an ICMP echo request and wait for reply.
int32_t montauk::ping(uint32_t ip, uint32_t timeoutMs = 3000);
SYS_RESOLVE (44)
Resolve a hostname to an IPv4 address via DNS. Sends a UDP
query to the configured DNS server and waits up to 5 seconds
for a reply. Returns the IP in network byte order, or 0 on
failure. IP address strings (e.g. "10.0.0.1") are detected
and returned directly without a DNS query.
uint32_t montauk::resolve(const char* hostname);
SYS_GETNETCFG (37)
Get the current network configuration (IP, mask, gateway, MAC,
DNS server).
void montauk::get_netcfg(montauk::abi::NetCfg* out);
SYS_SETNETCFG (38)
Set the network configuration (IP, mask, gateway, DNS server).
int montauk::set_netcfg(const montauk::abi::NetCfg* cfg);
SYS_NETSTATUS (125)
Get adapter status including driver name, link state, polling mode,
and RX/TX packet counters.
int montauk::net_status(montauk::abi::NetStatus* out);
SOCKETS
SYS_SOCKET (29)
Create a socket. type=SOCK_TCP (1) or SOCK_UDP (2).
Returns fd or -1.
int montauk::socket(int type);
SYS_CONNECT (30)
Connect a TCP socket to a remote host.
int montauk::connect(int fd, uint32_t ip, uint16_t port);
SYS_BIND (31)
Bind a socket to a local port for listening.
int montauk::bind(int fd, uint16_t port);
SYS_LISTEN (32)
Start listening for incoming TCP connections.
int montauk::listen(int fd);
SYS_ACCEPT (33)
Accept an incoming connection on a listening socket.
Returns a new socket fd for the client connection.
int montauk::accept(int fd);
SYS_SEND (34)
Send data on a connected socket. Returns bytes sent.
int montauk::send(int fd, const void* data, uint32_t len);
SYS_RECV (35)
Receive data from a connected socket. Returns bytes
received, 0 if no data available, or -1 on close/error.
int montauk::recv(int fd, void* buf, uint32_t maxLen);
SYS_CLOSESOCK (36)
Close a socket and release its resources.
int montauk::closesocket(int fd);
SYS_SENDTO (39)
Send a UDP datagram to a specific destination.
int montauk::sendto(int fd, const void* data, uint32_t len,
uint32_t destIp, uint16_t destPort);
SYS_RECVFROM (40)
Receive a UDP datagram. Returns the source address.
int montauk::recvfrom(int fd, void* buf, uint32_t maxLen,
uint32_t* srcIp, uint16_t* srcPort);
FRAMEBUFFER
SYS_FBINFO (21)
Get framebuffer dimensions and format.
void montauk::fb_info(montauk::abi::FbInfo* info);
SYS_FBMAP (22)
Map the framebuffer into process memory.
void* montauk::fb_map();
TERMINAL
SYS_TERMSIZE (24)
Get terminal dimensions (columns and rows).
void montauk::termsize(int* cols, int* rows);
SYS_TERMSCALE (43)
Get or set the terminal font scale factor. When scale_x is 0,
returns the current scale as (scale_y << 32 | scale_x). When
scale_x is non-zero, sets the font scale and returns the new
terminal dimensions as (rows << 32 | cols).
void montauk::termscale(int scale_x, int scale_y);
void montauk::get_termscale(int* scale_x, int* scale_y);
RANDOM
SYS_GETRANDOM (45)
Fill a buffer with random bytes using RDTSC-seeded entropy.
Returns the number of bytes written.
int64_t montauk::getrandom(void* buf, uint32_t len);
POWER MANAGEMENT
SYS_RESET (26)
Reboot the system.
[[noreturn]] void montauk::reset();
SYS_SHUTDOWN (27)
Shut down the system.
[[noreturn]] void montauk::shutdown();
SYS_SUSPEND (89)
Enter ACPI S3 sleep. Returns after wake, 0 on success.
int montauk::suspend();
SYS_POWER_REQUEST (135)
Cross-process graceful power-off request channel. The desktop
posts a pending action (POWER_REQ_SHUTDOWN / POWER_REQ_REBOOT)
then exits; login.elf reads it with POWER_REQ_QUERY
(read-and-clear), runs the shutdown stages, and finally calls
shutdown()/reset(). See montauk::abi::PowerRequestAction.
int montauk::power_request(int action);
SYS_POWERINFO (149)
Get the CPU power/thermal snapshot (HWP state, throttling,
package temperature, base/max/effective frequency). Returns 0
on success, -1 if unsupported by the running hardware.
int montauk::syscall1(SYS_POWERINFO, (uint64_t)&out);
// out: montauk::abi::PowerInfo*
KERNEL LOG
SYS_KLOG (46)
Read from the kernel ring log buffer.
int64_t montauk::read_klog(char* buf, uint64_t size);
I/O REDIRECTION
Used by the terminal app and similar programs to run a child
process with its console I/O captured instead of going directly
to the framebuffer console.
SYS_SPAWN_REDIR (49)
Spawn a process with its console I/O redirected to the caller.
int montauk::spawn_redir(const char* path, const char* args = nullptr);
SYS_CHILDIO_READ (50)
Read buffered output produced by a redirected child.
int montauk::childio_read(int childPid, char* buf, int maxLen);
SYS_CHILDIO_WRITE (51)
Write text input to a redirected child's stdin.
int montauk::childio_write(int childPid, const char* data, int len);
SYS_CHILDIO_WRITEKEY (52)
Forward a raw key event to a redirected child.
int montauk::childio_writekey(int childPid, const montauk::abi::KeyEvent* key);
SYS_CHILDIO_SETTERMSZ (53)
Tell a redirected child its terminal dimensions changed.
int montauk::childio_settermsz(int childPid, int cols, int rows);
WINDOW SERVER
Window server syscalls are used by GUI programs to create and
drive an on-screen window (see montauk/Window.hpp for the
higher-level win_create/win_poll/win_present wrappers built on
top of these).
SYS_WINCREATE (54)
Create a window and get its pixel buffer.
int montauk::win_create(const char* title, int w, int h,
montauk::abi::WinCreateResult* result);
SYS_WINDESTROY (55)
Destroy a window.
int montauk::win_destroy(int id);
SYS_WINPRESENT (56)
Flush the pixel buffer to the screen.
uint64_t montauk::win_present(int id);
SYS_WINPOLL (57)
Poll the next event (key, mouse, resize, close, scale) for a
window.
int montauk::win_poll(int id, montauk::abi::WinEvent* event);
SYS_WINENUM (58)
Enumerate all windows currently managed by the window server.
int montauk::win_enumerate(montauk::abi::WinInfo* info, int max);
SYS_WINMAP (59)
Map (or re-map) a window's pixel buffer into the caller's
address space.
uint64_t montauk::win_map(int id);
SYS_WINUNMAP (97)
Unmap a window's pixel buffer from the caller's address space.
int montauk::win_unmap(int id);
SYS_WINSENDEVENT (60)
Inject an event into a window's event queue.
int montauk::win_sendevent(int id, const montauk::abi::WinEvent* event);
SYS_WINRESIZE (64)
Resize a window and its pixel buffer.
uint64_t montauk::win_resize(int id, int w, int h);
SYS_WINSETSCALE (65)
Set the desktop-wide UI scale factor.
int montauk::win_setscale(int scale);
SYS_WINGETSCALE (66)
Get the desktop-wide UI scale factor.
int montauk::win_getscale();
SYS_WINSETCURSOR (68)
Set the mouse cursor shown while over a window (0=arrow,
1=resize_h, 2=resize_v).
int montauk::win_setcursor(int id, int cursor);
SYS_WINSETFLAGS (126)
Set window flags (e.g. WIN_FLAG_FULLSCREEN).
int montauk::win_setflags(int id, uint32_t flags);
DEVICES
SYS_DEVLIST (63)
Enumerate detected devices (CPU, interrupts, timers, input,
USB, network, display, storage, PCI, audio, ACPI) for the
device explorer app.
int montauk::devlist(montauk::abi::DevInfo* buf, int max);
SYS_DISKINFO (69)
Get detailed info for one block device (model, serial, sector
size, NCQ/TRIM/SMART support, etc.).
int montauk::diskinfo(montauk::abi::DiskInfo* buf, int port);
STORAGE
SYS_PARTLIST (70)
Enumerate GPT partitions across all block devices.
int montauk::partlist(montauk::abi::PartInfo* buf, int max);
SYS_DISKREAD (71)
Raw, driver-agnostic sector read from a block device.
int64_t montauk::disk_read(int blockDev, uint64_t lba,
uint32_t sectorCount, void* buf);
SYS_DISKWRITE (72)
Raw, driver-agnostic sector write to a block device.
int64_t montauk::disk_write(int blockDev, uint64_t lba,
uint32_t sectorCount, const void* buf);
SYS_GPTINIT (73)
Initialize a fresh GPT partition table on a block device.
int montauk::gpt_init(int blockDev);
SYS_GPTADD (74)
Add a partition to an existing GPT table.
int montauk::gpt_add(const montauk::abi::GptAddParams* params);
SYS_FSMOUNT (75)
Mount a partition's filesystem onto a drive number.
int montauk::fs_mount(int partIndex, int driveNum);
SYS_FSFORMAT (76)
Format a partition with a filesystem (FS_TYPE_FAT32 or
FS_TYPE_EXT2).
int montauk::fs_format(const montauk::abi::FsFormatParams* params);
SYS_FS_SYNC (134)
Flush all block-device write caches and cleanly unmount
disk-backed volumes ahead of power-off. Returns the number of
volumes unmounted. Part of the graceful shutdown sequence
(see SYS_POWER_REQUEST).
int montauk::fs_sync();
AUDIO
SYS_AUDIOOPEN (80)
Open a mixer output stream at the given sample rate, channel
count, and bit depth. Returns a stream handle.
int montauk::audio_open(uint32_t sampleRate, uint8_t channels,
uint8_t bitsPerSample);
SYS_AUDIOCLOSE (81)
Close an audio stream.
void montauk::audio_close(int handle);
SYS_AUDIOWRITE (82)
Write PCM samples to an audio stream.
int montauk::audio_write(int handle, const void* data, uint32_t size);
SYS_AUDIOCTL (83)
Control an audio stream or the global mixer. Commands 0-3 act
on the stream named by the handle argument; commands 4-12 act
on that stream's routing/mute state or the global master and
ignore or reuse the handle as documented below.
int montauk::audio_ctl(int handle, int cmd, int value);
Convenience wrappers (all thin calls onto audio_ctl):
audio_set_volume, audio_get_volume AUDIO_CTL_{SET,GET}_VOLUME (0/1)
audio_get_pos AUDIO_CTL_GET_POS (2)
audio_pause, audio_resume AUDIO_CTL_PAUSE (3)
audio_get_output AUDIO_CTL_GET_OUTPUT (4): 0=HDA, 1=Bluetooth
(SET_OUTPUT, 5) switch a stream's output route
audio_bt_status AUDIO_CTL_BT_STATUS (6)
audio_set_master_volume, _get_ AUDIO_CTL_{SET,GET}_MASTER_VOLUME (7/8), 0-100
audio_set_mute, audio_get_mute AUDIO_CTL_{SET,GET}_MUTE (9/10), per-stream
audio_set_master_mute, _get_ AUDIO_CTL_{SET,GET}_MASTER_MUTE (11/12)
SYS_AUDIOLIST (128)
Enumerate active mixer streams (owner PID, name, format,
volume, mute/pause state).
int montauk::audio_list(montauk::abi::AudioStreamInfo* buf, int maxCount);
SYS_AUDIOWAIT (129)
Return the current mixer state serial. With timeoutMs > 0,
blocks until the serial differs from prevSerial or the timeout
elapses; with timeoutMs == 0 it returns immediately.
uint64_t montauk::audio_wait(uint64_t prevSerial, uint64_t timeoutMs);
BLUETOOTH
SYS_BTSCAN (84)
Scan for discoverable Bluetooth devices for up to timeoutMs.
int montauk::bt_scan(montauk::abi::BtScanResult* buf, int maxCount,
uint32_t timeoutMs);
SYS_BTCONNECT (85)
Connect (and pair/bond if needed) to a device by BD_ADDR.
int montauk::bt_connect(const uint8_t* bdAddr);
SYS_BTDISCONNECT (86)
Disconnect from a device by BD_ADDR.
int montauk::bt_disconnect(const uint8_t* bdAddr);
SYS_BTLIST (87)
List currently connected devices.
int montauk::bt_list(montauk::abi::BtDevInfo* buf, int maxCount);
SYS_BTINFO (88)
Get local adapter info (BD_ADDR, name, init/scanning state).
int montauk::bt_info(montauk::abi::BtAdapterInfo* buf);
SYS_BTSETADDR (137)
Change the adapter's BD_ADDR (6-byte buffer, byte 0 is the
least-significant octet). Volatile -- apply after the last
controller reset and persist separately to bluetooth.toml.
int montauk::bt_set_addr(const uint8_t* bdAddr);
SYS_BTBONDS (138)
List bonded (paired) devices.
int montauk::bt_bonds(montauk::abi::BtBondInfo* buf, int maxCount);
SYS_BTFORGET (139)
Forget a paired device; it must re-pair next time.
int montauk::bt_forget(const uint8_t* bdAddr);
SOFTWARE-DEFINED RADIO
Receive-only SDR API. Receivers are enumerated by index in
[0, SYS_SDR_COUNT); SYS_SDR_OPEN returns a handle used by the
rest of the calls. Samples are delivered as interleaved 8-bit
unsigned I/Q (CU8, SDR_FORMAT_CU8) from the device's ring
buffer. Backed by an RTL-SDR (RTL2832U + R820T2) driver.
SYS_SDR_COUNT (140)
Number of available SDR receivers.
int montauk::sdr_count();
SYS_SDR_INFO (141)
Get static/dynamic info for one receiver by index (name, tuner,
frequency/sample-rate ranges, gain steps, present/streaming
flags).
int montauk::sdr_info(int index, montauk::abi::SdrDeviceInfo* out);
SYS_SDR_OPEN (142)
Open a receiver by index. Returns a handle.
int montauk::sdr_open(int index);
SYS_SDR_CLOSE (143)
Close a receiver handle.
int montauk::sdr_close(int handle);
SYS_SDR_START (144)
Begin streaming samples.
int montauk::sdr_start(int handle);
SYS_SDR_STOP (145)
Stop streaming samples.
int montauk::sdr_stop(int handle);
SYS_SDR_READ (146)
Non-blocking read of queued I/Q samples. Returns bytes copied.
int montauk::sdr_read(int handle, void* buf, uint32_t len);
SYS_SDR_SETPARAM (147)
Set a tunable parameter (see SDR_PARAM_* below).
int montauk::sdr_set_param(int handle, int param, uint64_t value);
SYS_SDR_GETPARAM (148)
Get a tunable parameter's current value.
int64_t montauk::sdr_get_param(int handle, int param);
Parameters (montauk::abi::SDR_PARAM_*): FREQ (center frequency,
Hz), SAMPLE_RATE (Hz), GAIN_MODE (0=auto/AGC, 1=manual), GAIN
(tenths of dB), FREQ_CORR (ppm), AGC (demod digital AGC, 0/1),
DIRECT_SAMP (0=off, 1=I, 2=Q). Convenience wrappers exist for
each: sdr_set_freq/sdr_get_freq, sdr_set_sample_rate/
sdr_get_sample_rate, sdr_set_gain_mode, sdr_set_gain,
sdr_set_freq_correction, sdr_set_agc.
CLIPBOARD
SYS_CLIPBOARD_SET_TEXT (119)
Set the system clipboard's text contents (max
CLIPBOARD_MAX_TEXT_BYTES, 256 KiB).
int montauk::clipboard_set_text(const char* data, uint32_t len);
SYS_CLIPBOARD_GET_INFO (120)
Get the clipboard's current size and serial number (for
change detection).
int montauk::clipboard_get_info(montauk::abi::ClipboardInfo* out);
SYS_CLIPBOARD_GET_TEXT (121)
Read the clipboard's text contents.
int montauk::clipboard_get_text(char* buf, uint32_t bufLen,
uint32_t* outLen, uint64_t* outSerial = nullptr);
SYS_CLIPBOARD_CLEAR (122)
Clear the clipboard.
int montauk::clipboard_clear();
GENERIC IPC
Handle-based IPC primitives underlying streams, mailboxes,
waitsets, and shared-memory surfaces (see kernel/src/Ipc/Ipc.hpp).
All are accessed via numeric handles with rights-based security
and can be waited on with SYS_WAIT_HANDLE or a waitset.
SYS_DUPHANDLE (98)
Duplicate a handle (e.g. to hand a copy to a child process).
int montauk::dup_handle(int handle);
SYS_WAIT_HANDLE (99)
Block until a handle's signals intersect wantedSignals, or
timeoutMs elapses. See IPC_SIGNAL_* (READABLE, WRITABLE,
PEER_CLOSED, EXITED, READY).
uint32_t montauk::wait_handle(int handle, uint32_t wantedSignals,
uint64_t timeoutMs = ~0ULL);
SYS_STREAM_CREATE (100)
Create a byte-pipe stream, returning a read handle and a write
handle.
int montauk::stream_create(int* outReadHandle, int* outWriteHandle,
uint32_t capacity = 0);
SYS_STREAM_READ (101)
Read bytes from a stream handle.
int montauk::stream_read(int handle, void* buf, int maxLen);
SYS_STREAM_WRITE (102)
Write bytes to a stream handle.
int montauk::stream_write(int handle, const void* data, int len);
SYS_MAILBOX_CREATE (103)
Create a message-queue mailbox, returning a send handle and a
receive handle.
int montauk::mailbox_create(int* outSendHandle, int* outRecvHandle);
SYS_MAILBOX_SEND (104)
Send a typed message, optionally attaching a handle to
transfer to the receiver.
int montauk::mailbox_send(int handle, uint32_t msgType, const void* data,
uint16_t len, int attachHandle = -1);
SYS_MAILBOX_RECV (105)
Receive a message.
int montauk::mailbox_recv(int handle, uint32_t* outMsgType, void* data,
uint16_t* inOutLen, int* outAttachHandle = nullptr);
SYS_WAITSET_CREATE (106)
Create a waitset for multiplexing waits across many handles.
int montauk::waitset_create();
SYS_WAITSET_ADD (107)
Add a handle and its signal mask to a waitset.
int montauk::waitset_add(int waitsetHandle, int targetHandle,
uint32_t signals);
SYS_WAITSET_REMOVE (108)
Remove an entry from a waitset by index.
int montauk::waitset_remove(int waitsetHandle, int index);
SYS_WAITSET_WAIT (109)
Block until any member handle's watched signals fire, or
timeoutMs elapses.
int montauk::waitset_wait(int waitsetHandle, montauk::abi::IpcWaitResult* outReady,
uint64_t timeoutMs = ~0ULL);
SYS_PROC_OPEN (110)
Open a handle to another process by PID (for waiting on its
exit via IPC_SIGNAL_EXITED, etc.).
int montauk::proc_open(int pid);
SYS_SURFACE_CREATE (111)
Create a shared pixel-buffer surface of byteSize bytes.
int montauk::surface_create(uint64_t byteSize);
SYS_SURFACE_MAP (112)
Map a surface into the caller's address space.
void* montauk::surface_map(int handle);
SYS_SURFACE_RESIZE (113)
Resize a surface.
int montauk::surface_resize(int handle, uint64_t newSize);
SHARED LIBRARIES
SYS_LOAD_LIB (114)
Load a shared library ELF (.lib) into the caller's address
space.
int montauk::load_lib(const char* path);
SYS_UNLOAD_LIB (115)
Unload a previously loaded library.
int montauk::unload_lib(int handle);
SYS_DLSYM (116)
Resolve a symbol offset within a loaded library to a callable
address.
void* montauk::dlsym(int handle, uint64_t symbolOffset);
SYS_GETLIBBASE (117)
Get the base virtual address a loaded library was mapped at.
uint64_t montauk::get_libbase(int handle);
CRASH REPORTING
SYS_CRASH_REPORT (118)
Retrieve the kernel-filled crash report for the last faulting
process (exception vector/name, faulting address, register
state, page-fault error bits). Used by the crashpad app.
int montauk::crash_report(montauk::abi::CrashReportInfo* out);
SEE ALSO
spawn(2), file(2), framebuffer(2), malloc(3), intro(1)