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NeXTSTEP 3.3 (Developer)…68k, x86, SPARC, PA-RISC]
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NeXTSTEP 3.3 Dev Intel.iso
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i386
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tss.h
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1992-05-15
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2KB
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94 lines
/*
* Copyright (c) 1992 NeXT Computer, Inc.
*
* Intel386 Family: Task State Segment.
*
* HISTORY
*
* 29 March 1992 David E. Bohman at NeXT
* Created.
*/
#import <architecture/i386/sel.h>
/*
* Task State segment.
*/
typedef struct tss {
sel_t oldtss;
unsigned int :0;
unsigned int esp0;
sel_t ss0;
unsigned int :0;
unsigned int esp1;
sel_t ss1;
unsigned int :0;
unsigned int esp2;
sel_t ss2;
unsigned int :0;
unsigned int cr3;
unsigned int eip;
unsigned int eflags;
unsigned int eax;
unsigned int ecx;
unsigned int edx;
unsigned int ebx;
unsigned int esp;
unsigned int ebp;
unsigned int esi;
unsigned int edi;
sel_t es;
unsigned int :0;
sel_t cs;
unsigned int :0;
sel_t ss;
unsigned int :0;
sel_t ds;
unsigned int :0;
sel_t fs;
unsigned int :0;
sel_t gs;
unsigned int :0;
sel_t ldt;
unsigned int :0;
unsigned int t :1,
:15,
io_bmap :16;
} tss_t;
#define TSS_SIZE(n) (sizeof (struct tss) + (n))
/*
* Task State segment descriptor.
*/
typedef struct tss_desc {
unsigned short limit00;
unsigned short base00;
unsigned char base16;
unsigned char type :5,
#define DESC_TSS 0x09
dpl :2,
present :1;
unsigned char limit16 :4,
:3,
granular:1;
unsigned char base24;
} tss_desc_t;
/*
* Task gate descriptor.
*/
typedef struct task_gate {
unsigned short :16;
sel_t tss;
unsigned int :8,
type :5,
#define DESC_TASK_GATE 0x05
dpl :2,
present :1,
:0;
} task_gate_t;