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 36 #ifndef _AMD64_PCB_H_ 37 #define _AMD64_PCB_H_ 38 39 /* 40 * AMD64 process control block 41 */ 42 #include <machine/fpu.h> 43 #include <machine/segments.h> 44 45 #ifdef __amd64__ 46 /* 47 * NB: The fields marked with (*) are used by kernel debuggers. Their 48 * ABI should be preserved. 49 */ 50 struct pcb { 51 register_t pcb_r15; /* (*) */ 52 register_t pcb_r14; /* (*) */ 53 register_t pcb_r13; /* (*) */ 54 register_t pcb_r12; /* (*) */ 55 register_t pcb_rbp; /* (*) */ 56 register_t pcb_rsp; /* (*) */ 57 register_t pcb_rbx; /* (*) */ 58 register_t pcb_rip; /* (*) */ 59 register_t pcb_fsbase; 60 register_t pcb_gsbase; 61 register_t pcb_kgsbase; 62 register_t pcb_cr0; 63 register_t pcb_cr2; 64 register_t pcb_cr3; 65 register_t pcb_cr4; 66 register_t pcb_dr0; 67 register_t pcb_dr1; 68 register_t pcb_dr2; 69 register_t pcb_dr3; 70 register_t pcb_dr6; 71 register_t pcb_dr7; 72 73 struct region_descriptor pcb_gdt; 74 struct region_descriptor pcb_idt; 75 struct region_descriptor pcb_ldt; 76 uint16_t pcb_tr; 77 78 u_int pcb_flags; 79 #define PCB_FULL_IRET 0x0001 /* full iret is required */ 80 #define PCB_DBREGS 0x0002 /* process using debug registers */ 81 #define PCB_KERNFPU 0x0004 /* kernel uses fpu */ 82 #define PCB_FPUINITDONE 0x0008 /* fpu state is initialized */ 83 #define PCB_USERFPUINITDONE 0x0010 /* fpu user state is initialized */ 84 #define PCB_KERNFPU_THR 0x0020 /* fpu_kern_thread() */ 85 #define PCB_32BIT 0x0040 /* process has 32 bit context (segs etc) */ 86 #define PCB_FPUNOSAVE 0x0080 /* no save area for current FPU ctx */ 87 88 uint16_t pcb_initial_fpucw; 89 90 /* copyin/out fault recovery */ 91 caddr_t pcb_onfault; 92 93 uint64_t pcb_saved_ucr3; 94 95 /* local tss, with i/o bitmap; NULL for common */ 96 struct amd64tss *pcb_tssp; 97 98 /* model specific registers */ 99 register_t pcb_efer; 100 register_t pcb_star; 101 register_t pcb_lstar; 102 register_t pcb_cstar; 103 register_t pcb_sfmask; 104 105 struct savefpu *pcb_save; 106 107 uint64_t pcb_pad[5]; 108 }; 109 110 /* Per-CPU state saved during suspend and resume. */ 111 struct susppcb { 112 struct pcb sp_pcb; 113 114 /* fpu context for suspend/resume */ 115 void *sp_fpususpend; 116 }; 117 #else /* 32bit */ 118 struct pcb { 119 uint64_t pcb_dummy[40]; 120 }; 121 #endif 122 123 #ifdef _KERNEL 124 struct trapframe; 125 126 void clear_pcb_flags(struct pcb *pcb, const u_int flags); 127 void makectx(struct trapframe *, struct pcb *); 128 void set_pcb_flags(struct pcb *pcb, const u_int flags); 129 void set_pcb_flags_raw(struct pcb *pcb, const u_int flags); 130 int savectx(struct pcb *) __returns_twice; 131 void resumectx(struct pcb *); 132 133 /* Ensure that pcb_gsbase and pcb_fsbase are up to date */ 134 #define update_pcb_bases(pcb) set_pcb_flags((pcb), PCB_FULL_IRET) 135 #endif 136 137 #endif /* _AMD64_PCB_H_ */ 138