1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2003 Peter Wemm. 5 * Copyright (c) 1990 The Regents of the University of California. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * William Jolitz. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * from: @(#)pcb.h 5.10 (Berkeley) 5/12/91 36 * $FreeBSD$ 37 */ 38 39 #ifndef _AMD64_PCB_H_ 40 #define _AMD64_PCB_H_ 41 42 /* 43 * AMD64 process control block 44 */ 45 #include <machine/fpu.h> 46 #include <machine/segments.h> 47 48 #ifdef __amd64__ 49 /* 50 * NB: The fields marked with (*) are used by kernel debuggers. Their 51 * ABI should be preserved. 52 */ 53 struct pcb { 54 register_t pcb_r15; /* (*) */ 55 register_t pcb_r14; /* (*) */ 56 register_t pcb_r13; /* (*) */ 57 register_t pcb_r12; /* (*) */ 58 register_t pcb_rbp; /* (*) */ 59 register_t pcb_rsp; /* (*) */ 60 register_t pcb_rbx; /* (*) */ 61 register_t pcb_rip; /* (*) */ 62 register_t pcb_fsbase; 63 register_t pcb_gsbase; 64 register_t pcb_kgsbase; 65 register_t pcb_cr0; 66 register_t pcb_cr2; 67 register_t pcb_cr3; 68 register_t pcb_cr4; 69 register_t pcb_dr0; 70 register_t pcb_dr1; 71 register_t pcb_dr2; 72 register_t pcb_dr3; 73 register_t pcb_dr6; 74 register_t pcb_dr7; 75 76 struct region_descriptor pcb_gdt; 77 struct region_descriptor pcb_idt; 78 struct region_descriptor pcb_ldt; 79 uint16_t pcb_tr; 80 81 u_int pcb_flags; 82 #define PCB_FULL_IRET 0x01 /* full iret is required */ 83 #define PCB_DBREGS 0x02 /* process using debug registers */ 84 #define PCB_KERNFPU 0x04 /* kernel uses fpu */ 85 #define PCB_FPUINITDONE 0x08 /* fpu state is initialized */ 86 #define PCB_USERFPUINITDONE 0x10 /* fpu user state is initialized */ 87 #define PCB_32BIT 0x40 /* process has 32 bit context (segs etc) */ 88 #define PCB_FPUNOSAVE 0x80 /* no save area for current FPU ctx */ 89 90 uint16_t pcb_initial_fpucw; 91 92 /* copyin/out fault recovery */ 93 caddr_t pcb_onfault; 94 95 uint64_t pcb_saved_ucr3; 96 97 /* local tss, with i/o bitmap; NULL for common */ 98 struct amd64tss *pcb_tssp; 99 100 /* model specific registers */ 101 register_t pcb_efer; 102 register_t pcb_star; 103 register_t pcb_lstar; 104 register_t pcb_cstar; 105 register_t pcb_sfmask; 106 107 struct savefpu *pcb_save; 108 109 uint64_t pcb_pad[5]; 110 }; 111 112 /* Per-CPU state saved during suspend and resume. */ 113 struct susppcb { 114 struct pcb sp_pcb; 115 116 /* fpu context for suspend/resume */ 117 void *sp_fpususpend; 118 }; 119 #else /* 32bit */ 120 struct pcb { 121 uint64_t pcb_dummy[40]; 122 }; 123 #endif 124 125 #ifdef _KERNEL 126 struct trapframe; 127 128 void clear_pcb_flags(struct pcb *pcb, const u_int flags); 129 void makectx(struct trapframe *, struct pcb *); 130 void set_pcb_flags(struct pcb *pcb, const u_int flags); 131 void set_pcb_flags_raw(struct pcb *pcb, const u_int flags); 132 int savectx(struct pcb *) __returns_twice; 133 void resumectx(struct pcb *); 134 135 /* Ensure that pcb_gsbase and pcb_fsbase are up to date */ 136 #define update_pcb_bases(pcb) set_pcb_flags((pcb), PCB_FULL_IRET) 137 #endif 138 139 #endif /* _AMD64_PCB_H_ */ 140