2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1990 The Regents of the University of California.
7 * This code is derived from software contributed to Berkeley by
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11 * modification, are permitted provided that the following conditions
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22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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34 * from: @(#)pcb.h 5.10 (Berkeley) 5/12/91
42 * Intel 386 process control block
45 #include <machine/segments.h>
47 #include <machine/npx.h>
50 * NB: The fields marked with (*) are used by kernel debuggers. Their
51 * ABI should be preserved.
54 int pcb_edi; /* (*) */
55 int pcb_esi; /* (*) */
56 int pcb_ebp; /* (*) */
57 int pcb_esp; /* (*) */
58 int pcb_ebx; /* (*) */
59 int pcb_eip; /* (*) */
60 struct segment_descriptor pcb_fsd;
61 struct segment_descriptor pcb_gsd;
78 struct region_descriptor pcb_gdt;
79 struct region_descriptor pcb_idt;
84 #define PCB_DBREGS 0x02 /* process using debug registers */
85 #define PCB_NPXINITDONE 0x08 /* fpu state is initialized */
86 #define PCB_VM86CALL 0x10 /* in vm86 call */
87 #define PCB_NPXUSERINITDONE 0x20 /* user fpu state is initialized */
88 #define PCB_KERNNPX 0x40 /* kernel uses npx */
90 uint16_t pcb_initial_npxcw;
92 caddr_t pcb_onfault; /* copyin/out fault recovery */
93 struct pcb_ext *pcb_ext; /* optional pcb extension */
94 int pcb_waspsl; /* unused padding for ABI and API compat */
95 u_long pcb_vm86[2]; /* vm86bios scratch space */
96 union savefpu *pcb_save;
101 /* Per-CPU state saved during suspend and resume. */
105 /* fpu context for suspend/resume */
112 void makectx(struct trapframe *, struct pcb *);
113 int savectx(struct pcb *) __returns_twice;
114 void resumectx(struct pcb *) __fastcall;
117 #endif /* _I386_PCB_H_ */