10.3.2 eflags.h: Processor flags register definitions

 

SYNOPSIS

#include <oskit/x86/eflags.h>

DESCRIPTION

XXX

This header file can be used in assembly language code as well as C. The flags defined here correspond the the ones in the processor databooks.

EFL_CF

carry

EFL_PF

parity of low 8 bits

EFL_AF

carry out of bit 3

EFL_ZF

zero

EFL_SF

sign

EFL_TF

trace trap

EFL_IF

interrupt enable

EFL_DF

direction

EFL_OF

overflow

EFL_IOPL

IO privilege level mask. All 0's is the same as EFL_IOPL_KERNEL, while all 1's (or just EFL_IOPL) is the same as EFL_IOPL_USER.

EFL_NT

nested task

EFL_RF

resume without tracing

EFL_VM

virtual 8086 mode

EFL_AC

alignment check

EFL_VIF

virtual interrupt flag

EFL_VIP

virtual interrupt pending

EFL_ID

CPUID instruction support