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.