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sys_machdep.c (4013) sys_machdep.c (6874)
1/*-
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 *
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 * William Jolitz.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.

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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 * from: @(#)sys_machdep.c 5.5 (Berkeley) 1/19/91
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.

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26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * from: @(#)sys_machdep.c 5.5 (Berkeley) 1/19/91
37 * $Id: sys_machdep.c,v 1.5 1994/08/13 03:49:46 wollman Exp $
34 * $Id: sys_machdep.c,v 1.6 1994/10/30 20:23:23 bde Exp $
35 *
38 */
39
40#include <sys/param.h>
41#include <sys/systm.h>
36 */
37
38#include <sys/param.h>
39#include <sys/systm.h>
42#include <sys/ioctl.h>
43#include <sys/file.h>
44#include <sys/time.h>
45#include <sys/proc.h>
40#include <sys/proc.h>
46#include <sys/uio.h>
47#include <sys/kernel.h>
48#include <sys/mtio.h>
49#include <sys/buf.h>
50#include <sys/trace.h>
51
52#ifdef USER_LDT
53#include <sys/user.h>
41#include <sys/user.h>
42
54#include <machine/cpu.h>
55#include <machine/sysarch.h>
43#include <machine/cpu.h>
44#include <machine/sysarch.h>
45
56#include <vm/vm_kern.h> /* for kernel_map */
46#include <vm/vm_kern.h> /* for kernel_map */
57#endif
58
47
59#ifdef TRACE
60int nvualarm;
48void set_user_ldt __P((struct pcb *pcb));
49int i386_get_ldt __P((struct proc *, char *, int *));
50int i386_set_ldt __P((struct proc *, char *, int *));
61
51
62struct vtrace_args {
63 int request;
64 int value;
52struct sysarch_args {
53 int op;
54 char *parms;
65};
66
55};
56
67vtrace(p, uap, retval)
57int
58sysarch(p, uap, retval)
68 struct proc *p;
59 struct proc *p;
69 register struct vtrace_args *uap;
60 register struct sysarch_args *uap;
70 int *retval;
71{
61 int *retval;
62{
72 int vdoualarm();
63 int error = 0;
73
64
74 switch (uap->request) {
75
76 case VTR_DISABLE: /* disable a trace point */
77 case VTR_ENABLE: /* enable a trace point */
78 if (uap->value < 0 || uap->value >= TR_NFLAGS)
79 return (EINVAL);
80 *retval = traceflags[uap->value];
81 traceflags[uap->value] = uap->request;
65 switch(uap->op) {
66#ifdef USER_LDT
67 case I386_GET_LDT:
68 error = i386_get_ldt(p, uap->parms, retval);
82 break;
83
69 break;
70
84 case VTR_VALUE: /* return a trace point setting */
85 if (uap->value < 0 || uap->value >= TR_NFLAGS)
86 return (EINVAL);
87 *retval = traceflags[uap->value];
71 case I386_SET_LDT:
72 error = i386_set_ldt(p, uap->parms, retval);
88 break;
73 break;
89
90 case VTR_UALARM: /* set a real-time ualarm, less than 1 min */
91 if (uap->value <= 0 || uap->value > 60 * hz || nvualarm > 5)
92 return (EINVAL);
93 nvualarm++;
94 timeout(vdoualarm, (caddr_t)p->p_pid, uap->value);
74#endif
75 default:
76 error = EINVAL;
95 break;
77 break;
96
97 case VTR_STAMP:
98 trace(TR_STAMP, uap->value, p->p_pid);
99 break;
100 }
78 }
101 return (0);
79 return(error);
102}
103
80}
81
104vdoualarm(arg)
105 int arg;
106{
107 register struct proc *p;
108
109 p = pfind(arg);
110 if (p)
111 psignal(p, 16);
112 nvualarm--;
113}
114#endif
115
116#ifdef USER_LDT
117void
118set_user_ldt(struct pcb *pcb)
119{
120 gdt_segs[GUSERLDT_SEL].ssd_base = (unsigned)pcb->pcb_ldt;
121 gdt_segs[GUSERLDT_SEL].ssd_limit = (pcb->pcb_ldt_len * sizeof(union descriptor)) - 1;
122 ssdtosd(&gdt_segs[GUSERLDT_SEL], &gdt[GUSERLDT_SEL].sd);
123 lldt(GSEL(GUSERLDT_SEL, SEL_KPL));

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291 *retval = uap->start;
292/* need_resched(); */
293 }
294
295 splx(s);
296 return(error);
297}
298#endif /* USER_LDT */
82#ifdef USER_LDT
83void
84set_user_ldt(struct pcb *pcb)
85{
86 gdt_segs[GUSERLDT_SEL].ssd_base = (unsigned)pcb->pcb_ldt;
87 gdt_segs[GUSERLDT_SEL].ssd_limit = (pcb->pcb_ldt_len * sizeof(union descriptor)) - 1;
88 ssdtosd(&gdt_segs[GUSERLDT_SEL], &gdt[GUSERLDT_SEL].sd);
89 lldt(GSEL(GUSERLDT_SEL, SEL_KPL));

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257 *retval = uap->start;
258/* need_resched(); */
259 }
260
261 splx(s);
262 return(error);
263}
264#endif /* USER_LDT */
299
300struct sysarch_args {
301 int op;
302 char *parms;
303};
304
305int
306sysarch(p, uap, retval)
307 struct proc *p;
308 register struct sysarch_args *uap;
309 int *retval;
310{
311 int error = 0;
312
313 switch(uap->op) {
314#ifdef USER_LDT
315 case I386_GET_LDT:
316 error = i386_get_ldt(p, uap->parms, retval);
317 break;
318
319 case I386_SET_LDT:
320 error = i386_set_ldt(p, uap->parms, retval);
321 break;
322#endif
323 default:
324 error = EINVAL;
325 break;
326 }
327 return(error);
328}