What is SWI-Software Interrupts in ARM?

All Questions › Category: Embedded System › What is SWI-Software Interrupts in ARM?

0 Vote Up Vote Down

<img alt='' src='https://secure.gravatar.com/avatar/72e7abc8c14a8c6f29e6974efa23cf6b?s=48&d=mm&r=g' srcset='https://secure.gravatar.com/avatar/72e7abc8c14a8c6f29e6974efa23cf6b?s=96&d=mm&r=g 2x' class='avatar avatar-48 photo' height='48' width='48' decoding='async'/>

Chetan Shidling Staff asked 5 years ago

I need short information.

1 Answers

0 Vote Up Vote Down

<img alt='' src='https://secure.gravatar.com/avatar/72e7abc8c14a8c6f29e6974efa23cf6b?s=48&d=mm&r=g' srcset='https://secure.gravatar.com/avatar/72e7abc8c14a8c6f29e6974efa23cf6b?s=96&d=mm&r=g 2x' class='avatar avatar-48 photo' height='48' width='48' decoding='async'/>

Chetan Shidling Staff answered 5 years ago

SWIs are generated by using the ARM instruction SWI.
It makes an exception to be taken and forces the processor into Supervisor mode, which is privileged.
When an SWI instruction is encountered, the processor fetches the instruction at the exception vector address 0x00000008 after changing to Supervisor mode.