1 /*-
2 * Mach Operating System
3 * Copyright (c) 1991,1990 Carnegie Mellon University
4 * All Rights Reserved.
5 *
6 * Permission to use, copy, modify and distribute this software and its
7 * documentation is hereby granted, provided that both the copyright
8 * notice and this permission notice appear in all copies of the
9 * software, derivative works or modified versions, and any portions
10 * thereof, and that both notices appear in supporting documentation.
11 *
12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS
13 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
15 *
16 * Carnegie Mellon requests users of this software to return to
17 *
18 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
19 * School of Computer Science
20 * Carnegie Mellon University
21 * Pittsburgh PA 15213-3890
22 *
23 * any improvements or extensions that they make and grant Carnegie the
24 * rights to redistribute these changes.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29
30 /*
31 * Interface to new debugger.
32 */
33
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/kdb.h>
37 #include <sys/pcpu.h>
38
39 #include <machine/cpufunc.h>
40 #include <machine/md_var.h>
41 #include <machine/specialreg.h>
42
43 #include <ddb/ddb.h>
44
45 /*
46 * Read bytes from kernel address space for debugger.
47 */
48 int
49 db_read_bytes(vm_offset_t addr, size_t size, char *data)
50 {
51 jmp_buf jb;
52 void *prev_jb;
53 char *src;
54 int ret;
55
56 prev_jb = kdb_jmpbuf(jb);
57 ret = setjmp(jb);
58 if (ret == 0) {
59 src = (char *)addr;
60 while (size-- > 0)
61 *data++ = *src++;
62 }
63 (void)kdb_jmpbuf(prev_jb);
64 return (ret);
65 }
66
67 /*
68 * Write bytes to kernel address space for debugger.
69 * We need to disable write protection temporarily so we can write
70 * things (such as break points) that might be in write-protected
71 * memory.
72 */
73 int
74 db_write_bytes(vm_offset_t addr, size_t size, char *data)
75 {
76 jmp_buf jb;
77 void *prev_jb;
78 char *dst;
79 bool old_wp;
80 int ret;
81
82 old_wp = false;
83 prev_jb = kdb_jmpbuf(jb);
84 ret = setjmp(jb);
85 if (ret == 0) {
86 old_wp = disable_wp();
87 dst = (char *)addr;
88 while (size-- > 0)
89 *dst++ = *data++;
90 }
91 restore_wp(old_wp);
92 (void)kdb_jmpbuf(prev_jb);
93 return (ret);
94 }
95
96 void
97 db_show_mdpcpu(struct pcpu *pc)
98 {
99
100 db_printf("self = %p\n", pc->pc_prvspace);
101 db_printf("curpmap = %p\n", pc->pc_curpmap);
102 db_printf("tssp = %p\n", pc->pc_tssp);
103 db_printf("rsp0 = 0x%lx\n", pc->pc_rsp0);
104 db_printf("kcr3 = 0x%lx\n", pc->pc_kcr3);
105 db_printf("ucr3 = 0x%lx\n", pc->pc_ucr3);
106 db_printf("scr3 = 0x%lx\n", pc->pc_saved_ucr3);
107 db_printf("gs32p = %p\n", pc->pc_gs32p);
108 db_printf("ldt = %p\n", pc->pc_ldt);
109 db_printf("tss = %p\n", pc->pc_tss);
110 }
Cache object: 7c96aed048ecf5769d0ac4b819a79f9c
|