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File Content: `vm86.h`

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _UAPI_ASM_X86_VM86_H
#define _UAPI_ASM_X86_VM86_H

/*
 * I'm guessing at the VIF/VIP flag usage, but hope that this is how
 * the Pentium uses them. Linux will return from vm86 mode when both
 * VIF and VIP is set.
 *
 * On a Pentium, we could probably optimize the virtual flags directly
 * in the eflags register instead of doing it "by hand" in vflags...
 *
 * Linus
 */

#include <asm/processor-flags.h>

#define BIOSSEG		0x0f000

#define CPU_086		0
#define CPU_186		1
#define CPU_286		2
#define CPU_386		3
#define CPU_486		4
#define CPU_586		5

/*
 * Return values for the 'vm86()' system call
 */
#define VM86_TYPE(retval)	((retval) & 0xff)
#define VM86_ARG(retval)	((retval) >> 8)

#define VM86_SIGNAL	0	/* return due to signal */
#define VM86_UNKNOWN	1	/* unhandled GP fault
				   - IO-instruction or similar */
#define VM86_INTx	2	/* int3/int x instruction (ARG = x) */
#define VM86_STI	3	/* sti/popf/iret instruction enabled
				   virtual interrupts */

/*
 * Additional return values when invoking new vm86()
 */
#define VM86_PICRETURN	4	/* return due to pending PIC request */
#define VM86_TRAP	6	/* return due to DOS-debugger request */

/*
 * function codes when invoking new vm86()
 */
#define VM86_PLUS_INSTALL_CHECK	0
#define VM86_ENTER		1
#define VM86_ENTER_NO_BYPASS	2
#define	VM86_REQUEST_IRQ	3
#define VM86_FREE_IRQ		4
#define VM86_GET_IRQ_BITS	5
#define VM86_GET_AND_RESET_IRQ	6

/*
 * This is the stack-layout seen by the user space program when we have
 * done a translation of "SAVE_ALL" from vm86 mode. The real kernel layout
 * is 'kernel_vm86_regs' (see below).
 */

struct vm86_regs {
/*
 * normal regs, with special meaning for the segment descriptors..
 */
	long ebx;
	long ecx;
	long edx;
	long esi;
	long edi;
	long ebp;
	long eax;
	long __null_ds;
	long __null_es;
	long __null_fs;
	long __null_gs;
	long orig_eax;
	long eip;
	unsigned short cs, __csh;
	long eflags;
	long esp;
	unsigned short ss, __ssh;
/*
 * these are specific to v86 mode:
 */
	unsigned short es, __esh;
	unsigned short ds, __dsh;
	unsigned short fs, __fsh;
	unsigned short gs, __gsh;
};

struct revectored_struct {
	unsigned long __map[8];			/* 256 bits */
};

struct vm86_struct {
	struct vm86_regs regs;
	unsigned long flags;
	unsigned long screen_bitmap;
	unsigned long cpu_type;
	struct revectored_struct int_revectored;
	struct revectored_struct int21_revectored;
};

/*
 * flags masks
 */
#define VM86_SCREEN_BITMAP	0x0001

struct vm86plus_info_struct {
	unsigned long force_return_for_pic:1;
	unsigned long vm86dbg_active:1;       /* for debugger */
	unsigned long vm86dbg_TFpendig:1;     /* for debugger */
	unsigned long unused:28;
	unsigned long is_vm86pus:1;	      /* for vm86 internal use */
	unsigned char vm86dbg_intxxtab[32];   /* for debugger */
};
struct vm86plus_struct {
	struct vm86_regs regs;
	unsigned long flags;
	unsigned long screen_bitmap;
	unsigned long cpu_type;
	struct revectored_struct int_revectored;
	struct revectored_struct int21_revectored;
	struct vm86plus_info_struct vm86plus;
};


#endif /* _UAPI_ASM_X86_VM86_H */

Name	Size	Permission
Kbuild	117 bytes	0644
a.out.h	756 bytes	0644
auxvec.h	546 bytes	0644
bitsperlong.h	321 bytes	0644
boot.h	338 bytes	0644
bootparam.h	7753 bytes	0644
byteorder.h	200 bytes	0644
debugreg.h	3300 bytes	0644
e820.h	2620 bytes	0644
hw_breakpoint.h	69 bytes	0644
hwcap2.h	198 bytes	0644
ist.h	869 bytes	0644
kvm.h	9244 bytes	0644
kvm_para.h	3356 bytes	0644
kvm_perf.h	388 bytes	0644
ldt.h	1306 bytes	0644
mce.h	1703 bytes	0644
mman.h	1002 bytes	0644
msgbuf.h	1053 bytes	0644
msr.h	361 bytes	0644
mtrr.h	4240 bytes	0644
perf_regs.h	1403 bytes	0644
posix_types.h	250 bytes	0644
posix_types_32.h	765 bytes	0644
posix_types_64.h	609 bytes	0644
posix_types_x32.h	581 bytes	0644
prctl.h	418 bytes	0644
processor-flags.h	6638 bytes	0644
ptrace-abi.h	2037 bytes	0644
ptrace.h	1630 bytes	0644
sembuf.h	1045 bytes	0644
setup.h	6 bytes	0644
shmbuf.h	1258 bytes	0644
sigcontext.h	9951 bytes	0644
sigcontext32.h	271 bytes	0644
siginfo.h	422 bytes	0644
signal.h	3040 bytes	0644
stat.h	3131 bytes	0644
statfs.h	416 bytes	0644
svm.h	7083 bytes	0644
swab.h	769 bytes	0644
ucontext.h	2117 bytes	0644
unistd.h	664 bytes	0644
vm86.h	3133 bytes	0644
vmx.h	7046 bytes	0644
vsyscall.h	278 bytes	0644

File Content: vm86.h

File Content: `vm86.h`