Why a subroutine to minus two SP

CodePudding user response:

Call subroutine, the address of the breakpoint will be onto the stack, takes up two units, so before this stack data address minus 2 need to address at this time,

CodePudding user response:

Lz take pictures photos wouldn't he? Or image over 90 degrees and try again? To this question is definitely not respect for others

CodePudding user response:

Yes, yesterday to understand, thank you!

CodePudding user response:

reference 1st floor yishumei response:

call subroutine, the address of the breakpoint will be onto the stack, takes up two units, so before this stack data address minus 2 need to address at this time,

Yes, yesterday to understand, thank you!

CodePudding user response:

refer to the second floor worldy response:

lz take pictures photos wouldn't he? Or image over 90 degrees and try again? To this question is definitely not respect for others

That right, I'm new here, sorry ha will slowly learning