136 lines
4.4 KiB
C
136 lines
4.4 KiB
C
/*-
|
|
* Copyright (c) 2003 Peter Wemm.
|
|
* Copyright (c) 1990 The Regents of the University of California.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* William Jolitz.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* from: @(#)pcb.h 5.10 (Berkeley) 5/12/91
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _AMD64_PCB_H_
|
|
#define _AMD64_PCB_H_
|
|
|
|
/*
|
|
* AMD64 process control block
|
|
*/
|
|
#include <machine/fpu.h>
|
|
#include <machine/segments.h>
|
|
|
|
struct pcb {
|
|
register_t pcb_r15;
|
|
register_t pcb_r14;
|
|
register_t pcb_r13;
|
|
register_t pcb_r12;
|
|
register_t pcb_rbp;
|
|
register_t pcb_rsp;
|
|
register_t pcb_rbx;
|
|
register_t pcb_rip;
|
|
register_t pcb_fsbase;
|
|
register_t pcb_gsbase;
|
|
register_t pcb_kgsbase;
|
|
register_t pcb_cr0;
|
|
register_t pcb_cr2;
|
|
register_t pcb_cr3;
|
|
register_t pcb_cr4;
|
|
register_t pcb_dr0;
|
|
register_t pcb_dr1;
|
|
register_t pcb_dr2;
|
|
register_t pcb_dr3;
|
|
register_t pcb_dr6;
|
|
register_t pcb_dr7;
|
|
|
|
struct region_descriptor pcb_gdt;
|
|
struct region_descriptor pcb_idt;
|
|
struct region_descriptor pcb_ldt;
|
|
uint16_t pcb_tr;
|
|
|
|
u_int pcb_flags;
|
|
#define PCB_FULL_IRET 0x01 /* full iret is required */
|
|
#define PCB_DBREGS 0x02 /* process using debug registers */
|
|
#define PCB_KERNFPU 0x04 /* kernel uses fpu */
|
|
#define PCB_FPUINITDONE 0x08 /* fpu state is initialized */
|
|
#define PCB_USERFPUINITDONE 0x10 /* fpu user state is initialized */
|
|
#define PCB_GS32BIT 0x20 /* linux gs switch */
|
|
#define PCB_32BIT 0x40 /* process has 32 bit context (segs etc) */
|
|
|
|
uint16_t pcb_initial_fpucw;
|
|
|
|
/* copyin/out fault recovery */
|
|
caddr_t pcb_onfault;
|
|
|
|
/* 32-bit segment descriptor */
|
|
struct user_segment_descriptor pcb_gs32sd;
|
|
|
|
/* local tss, with i/o bitmap; NULL for common */
|
|
struct amd64tss *pcb_tssp;
|
|
|
|
struct savefpu *pcb_save;
|
|
struct savefpu pcb_user_save;
|
|
};
|
|
|
|
#ifdef _KERNEL
|
|
struct trapframe;
|
|
|
|
/*
|
|
* The pcb_flags is only modified by current thread, or by other threads
|
|
* when current thread is stopped. However, current thread may change it
|
|
* from the interrupt context in cpu_switch(), or in the trap handler.
|
|
* When we read-modify-write pcb_flags from C sources, compiler may generate
|
|
* code that is not atomic regarding the interrupt handler. If a trap or
|
|
* interrupt happens and any flag is modified from the handler, it can be
|
|
* clobbered with the cached value later. Therefore, we implement setting
|
|
* and clearing flags with single-instruction functions, which do not race
|
|
* with possible modification of the flags from the trap or interrupt context,
|
|
* because traps and interrupts are executed only on instruction boundary.
|
|
*/
|
|
static __inline void
|
|
set_pcb_flags(struct pcb *pcb, const u_int flags)
|
|
{
|
|
|
|
__asm __volatile("orl %1,%0"
|
|
: "=m" (pcb->pcb_flags) : "ir" (flags), "m" (pcb->pcb_flags)
|
|
: "cc");
|
|
}
|
|
|
|
static __inline void
|
|
clear_pcb_flags(struct pcb *pcb, const u_int flags)
|
|
{
|
|
|
|
__asm __volatile("andl %1,%0"
|
|
: "=m" (pcb->pcb_flags) : "ir" (~flags), "m" (pcb->pcb_flags)
|
|
: "cc");
|
|
}
|
|
|
|
void makectx(struct trapframe *, struct pcb *);
|
|
int savectx(struct pcb *);
|
|
#endif
|
|
|
|
#endif /* _AMD64_PCB_H_ */
|