Format
#include <builtin.h> /* also defined in <stdlib.h> */ void _enable( void );
Language Level: Extension
_enable enables interrupts by generating the STI
machine instruction. Interrupts are enabled after the instruction
following STI has been executed. If interrupts are disabled and
you call _enable followed immediately by a call to _disable,
interrupts remain disabled.
Because it is a built-in function and has no backing code in the library:
You can run code containing this function only at ring zero. Otherwise, an invalid instruction exception will be generated.
Return Value
There is no return value.
Example
In this example, _enable enables
interrupts by executing an STI instruction.
#include <builtin.h>
int main(void)
{
/* ------------------------------------------------------ */
/* The expected assembler instruction looks like this : */
/* STI */
/* ------------------------------------------------------ */
_enable();
return 0;
}
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_disable -- Disable
Interrupt
_interrupt --
Call Interrupt Procedure
<builtin.h>