subr_trap.c (a0ad3760a2235cb0d4625d83db092df5ea0f3db9) subr_trap.c (960173b9b283675c49eee318c6ca8c12ecb5d188)
1/*-
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * the University of Utah, and William Jolitz.
7 *
8 * Redistribution and use in source and binary forms, with or without

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28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
1/*-
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * the University of Utah, and William Jolitz.
7 *
8 * Redistribution and use in source and binary forms, with or without

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28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * @(#)trap.c 7.4 (Berkeley) 5/13/91
37 *
38 * PATCHES MAGIC LEVEL PATCH THAT GOT US HERE
39 * -------------------- ----- ----------------------
40 * CURRENT PATCH LEVEL: 1 00137
41 * -------------------- ----- ----------------------
42 *
43 * 08 Apr 93 Bruce Evans Several VM system fixes
44 * Paul Kranenburg Add counter for vmstat
36 * from: @(#)trap.c 7.4 (Berkeley) 5/13/91
37 * $Id$
45 */
38 */
46static char rcsid[] = "$Header: /a/cvs/386BSD/src/sys/i386/i386/trap.c,v 1.2 1993/07/27 10:52:20 davidg Exp $";
47
48/*
49 * 386 Trap and System call handleing
50 */
51
39
40/*
41 * 386 Trap and System call handleing
42 */
43
44#include "npx.h"
52#include "machine/cpu.h"
53#include "machine/psl.h"
54#include "machine/reg.h"
55
56#include "param.h"
57#include "systm.h"
58#include "proc.h"
59#include "user.h"

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201 cnt.v_soft++;
202 if ((p->p_flag & SOWEUPC) && p->p_stats->p_prof.pr_scale) {
203 addupc(frame.tf_eip, &p->p_stats->p_prof, 1);
204 p->p_flag &= ~SOWEUPC;
205 }
206 goto out;
207
208 case T_DNA|T_USER:
45#include "machine/cpu.h"
46#include "machine/psl.h"
47#include "machine/reg.h"
48
49#include "param.h"
50#include "systm.h"
51#include "proc.h"
52#include "user.h"

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194 cnt.v_soft++;
195 if ((p->p_flag & SOWEUPC) && p->p_stats->p_prof.pr_scale) {
196 addupc(frame.tf_eip, &p->p_stats->p_prof, 1);
197 p->p_flag &= ~SOWEUPC;
198 }
199 goto out;
200
201 case T_DNA|T_USER:
209#ifdef NPX
202#if NNPX > 0
210 /* if a transparent fault (due to context switch "late") */
211 if (npxdna()) return;
203 /* if a transparent fault (due to context switch "late") */
204 if (npxdna()) return;
212#endif
205#endif /* NNPX > 0 */
213#ifdef MATH_EMULATE
214 i = math_emulate(&frame);
215 if (i == 0) return;
216#else /* MATH_EMULTATE */
217 panic("trap: math emulation necessary!");
218#endif /* MATH_EMULTATE */
219 ucode = FPE_FPU_NP_TRAP;
220 break;

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253 register vm_map_t map;
254 int rv;
255 vm_prot_t ftype;
256 extern vm_map_t kernel_map;
257 unsigned nss,v;
258
259 va = trunc_page((vm_offset_t)eva);
260 /*
206#ifdef MATH_EMULATE
207 i = math_emulate(&frame);
208 if (i == 0) return;
209#else /* MATH_EMULTATE */
210 panic("trap: math emulation necessary!");
211#endif /* MATH_EMULTATE */
212 ucode = FPE_FPU_NP_TRAP;
213 break;

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246 register vm_map_t map;
247 int rv;
248 vm_prot_t ftype;
249 extern vm_map_t kernel_map;
250 unsigned nss,v;
251
252 va = trunc_page((vm_offset_t)eva);
253 /*
261 * Avoid even looking at pde_v(va) for high va's. va's
262 * above VM_MAX_KERNEL_ADDRESS don't correspond to normal
263 * PDE's (half of them correspond to APDEpde and half to
264 * an unmapped kernel PDE). va's betweeen 0xFEC00000 and
265 * VM_MAX_KERNEL_ADDRESS correspond to unmapped kernel PDE's
266 * (XXX - why are only 3 initialized when 6 are required to
267 * reach VM_MAX_KERNEL_ADDRESS?). Faulting in an unmapped
268 * kernel page table would give inconsistent PTD's.
269 *
270 * XXX - faulting in unmapped page tables wastes a page if
271 * va turns out to be invalid.
272 *
273 * XXX - should "kernel address space" cover the kernel page
274 * tables? Might have same problem with PDEpde as with
275 * APDEpde (or there may be no problem with APDEpde).
276 */
277 if (va > 0xFEBFF000) {
278 rv = KERN_FAILURE; /* becomes SIGBUS */
279 goto nogo;
280 }
281 /*
282 * It is only a kernel address space fault iff:
283 * 1. (type & T_USER) == 0 and
284 * 2. pcb_onfault not set or
285 * 3. pcb_onfault set but supervisor space fault
286 * The last can occur during an exec() copyin where the
287 * argument space is lazy-allocated.
288 */
289 if (type == T_PAGEFLT && va >= KERNBASE)

--- 324 unchanged lines hidden --- 		254 * It is only a kernel address space fault iff:
255 * 1. (type & T_USER) == 0 and
256 * 2. pcb_onfault not set or
257 * 3. pcb_onfault set but supervisor space fault
258 * The last can occur during an exec() copyin where the
259 * argument space is lazy-allocated.
260 */
261 if (type == T_PAGEFLT && va >= KERNBASE)

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