Module syscall

Sentry kernel low level syscall implementation

Usage

This module is responsible for calling the kernel gate through the target architecture supervisor access opcode, in interaction with the corresponding arch backend.

There is no abstraction at this module’s level and should not be used directly, but instead with an upper interface such as shield

NOTE: This module may not be kept public forever

Functions

• alarm
  Send a SIGALRM signal to the task after timeout_ms milliseconds.
• dma_assign_stream
  assign a DMA stream to its corresponding hardware channel
• dma_get_stream_info
  get a DMA stream static (dts-related) information from the kernel, as a structured data through SVC_Exchange
• dma_get_stream_status
  get the status of a given DMA stream
• dma_resume_stream
  resume a DMA stream
• dma_start_stream
  start a DMA stream
• dma_suspend_stream
  suspend a DMA stream
• dma_unassign_stream
  unassign a DMA stream from its corresponding hardware channel
• exit
  Exits the current job
• get_cycle
  Get back the elapsed time since startup, in various units
• get_device_handle
  Get global identifier for a given device label
• get_dma_stream_handle
  Get global identifier for a given DMA stream label
• get_process_handle
  Get global identifier for a given process label
• get_random
  Get random seed from the Sentry kernel RNG backend
• get_shm_handle
  Get global identifier for a given SHM label
• gpio_configure
  Configure a given GPIO for a device identified by its handle
• gpio_get
  Get the value of a given GPIO for a device identified by its handle
• gpio_reset
  Reset the value of a given GPIO for a device identified by its handle
• gpio_set
  Set the value of a given GPIO for a device identified by its handle
• gpio_toggle
  Toggle the value of a given GPIO for a device identified by its handle
• irq_acknowledge
  acknowledge at interrupt controller level the given interrupt
• irq_disable
  disable (mask) at interrupt controller level the given interrupt
• irq_enable
  enable (unmask) at interrupt controller level the given interrupt
• log
  Send a message from the current task’s ‘svc_exchange area’ through the UART.
• map_dev
  Map a device in the caller’s memory layout
• map_shm
  Map a shared memory in the caller’s memory layout
• pm_manage
  Configure the CPU’s sleep behaviour.
• pm_set_clock
  Set a given explicit clock config
• sched_yield
  Release the processor before the end of the current quantum
• send_ipc
  Send events to another job identified by its handle
• send_signal
  Send signal to another job identified by its handle
• shm_get_infos
  get the static information of a given DMA stream
• shm_set_credential
  Set the credentials associated to a shared memory
• sleep
  Sleep for a given amount of time
• start
  Start another task identified by its label
• unmap_dev
  Unùap a previously mapped device
• unmap_shm
  Unmap a previously mapped shared memory
• wait_for_event
  Wait for input event. Single active blocking syscall.