3d271aaab0
Debuggers may need to change PSL_RF. Note that tf_eflags is already stored in the signal context during signal handling and PSL_RF previously could be modified via sigreturn, so this change should not provide any new ability to userspace. For background see the thread at: http://lists.freebsd.org/pipermail/freebsd-i386/2007-September/005910.html Reviewed by: jhb, kib Sponsored by: DARPA, AFRL
166 lines
4.5 KiB
C
166 lines
4.5 KiB
C
/*-
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* Copyright (c) 1997 Jonathan Lemon
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* All rights reserved.
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*
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* Derived from register.h, which is
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* Copyright (c) 1996 Michael Smith. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _MACHINE_VM86_H_
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#define _MACHINE_VM86_H_ 1
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/* standard register representation */
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typedef union {
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u_int r_ex;
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struct {
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u_short r_x;
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u_int :16;
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} r_w;
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struct {
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u_char r_l;
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u_char r_h;
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u_int :16;
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} r_b;
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} reg86_t;
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/* layout must match definition of struct trapframe_vm86 in <machine/frame.h> */
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struct vm86frame {
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int kernel_fs;
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int kernel_es;
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int kernel_ds;
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reg86_t edi;
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reg86_t esi;
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reg86_t ebp;
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reg86_t isp;
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reg86_t ebx;
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reg86_t edx;
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reg86_t ecx;
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reg86_t eax;
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int vmf_trapno;
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int vmf_err;
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reg86_t eip;
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reg86_t cs;
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reg86_t eflags;
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reg86_t esp;
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reg86_t ss;
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reg86_t es;
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reg86_t ds;
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reg86_t fs;
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reg86_t gs;
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#define vmf_ah eax.r_b.r_h
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#define vmf_al eax.r_b.r_l
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#define vmf_ax eax.r_w.r_x
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#define vmf_eax eax.r_ex
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#define vmf_bh ebx.r_b.r_h
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#define vmf_bl ebx.r_b.r_l
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#define vmf_bx ebx.r_w.r_x
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#define vmf_ebx ebx.r_ex
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#define vmf_ch ecx.r_b.r_h
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#define vmf_cl ecx.r_b.r_l
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#define vmf_cx ecx.r_w.r_x
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#define vmf_ecx ecx.r_ex
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#define vmf_dh edx.r_b.r_h
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#define vmf_dl edx.r_b.r_l
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#define vmf_dx edx.r_w.r_x
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#define vmf_edx edx.r_ex
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#define vmf_si esi.r_w.r_x
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#define vmf_di edi.r_w.r_x
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#define vmf_cs cs.r_w.r_x
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#define vmf_ds ds.r_w.r_x
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#define vmf_es es.r_w.r_x
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#define vmf_ss ss.r_w.r_x
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#define vmf_bp ebp.r_w.r_x
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#define vmf_sp esp.r_w.r_x
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#define vmf_ip eip.r_w.r_x
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#define vmf_flags eflags.r_w.r_x
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#define vmf_eflags eflags.r_ex
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};
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#define VM86_PMAPSIZE 24
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#define VMAP_MALLOC 1 /* page was malloced by us */
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struct vm86context {
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int npages;
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struct vm86pmap {
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int flags;
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int pte_num;
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vm_offset_t kva;
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u_int old_pte;
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} pmap[VM86_PMAPSIZE];
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};
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#define VM_USERCHANGE (PSL_USERCHANGE)
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#define VME_USERCHANGE (VM_USERCHANGE | PSL_VIP | PSL_VIF)
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struct vm86_kernel {
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caddr_t vm86_intmap; /* interrupt map */
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u_int vm86_eflags; /* emulated flags */
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int vm86_has_vme; /* VME support */
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int vm86_inited; /* we were initialized */
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int vm86_debug;
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caddr_t vm86_sproc; /* address of sproc */
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};
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#define VM86_INIT 1
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#define VM86_SET_VME 2
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#define VM86_GET_VME 3
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#define VM86_INTCALL 4
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struct vm86_init_args {
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int debug; /* debug flag */
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int cpu_type; /* cpu type to emulate */
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u_char int_map[32]; /* interrupt map */
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};
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struct vm86_vme_args {
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int state; /* status */
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};
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struct vm86_intcall_args {
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int intnum;
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struct vm86frame vmf;
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};
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#ifdef _KERNEL
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extern int vm86paddr;
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struct thread;
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extern int vm86_emulate(struct vm86frame *);
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extern int vm86_sysarch(struct thread *, char *);
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extern void vm86_trap(struct vm86frame *);
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extern int vm86_intcall(int, struct vm86frame *);
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extern int vm86_datacall(int, struct vm86frame *, struct vm86context *);
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extern void vm86_initialize(void);
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extern vm_offset_t vm86_getpage(struct vm86context *, int);
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extern vm_offset_t vm86_addpage(struct vm86context *, int, vm_offset_t);
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extern int vm86_getptr(struct vm86context *, vm_offset_t, u_short *, u_short *);
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extern vm_offset_t vm86_getaddr(struct vm86context *, u_short, u_short);
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#endif /* _KERNEL */
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#endif /* _MACHINE_VM86_H_ */
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