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 /*
29 * Interface to new debugger.
30 */
31
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/kdb.h>
35 #include <sys/pcpu.h>
36
37 #include <machine/cpufunc.h>
38 #include <machine/md_var.h>
39 #include <machine/specialreg.h>
40
41 #include <ddb/ddb.h>
42
43 /*
44 * Read bytes from kernel address space for debugger.
45 */
46 int
db_read_bytes(vm_offset_t addr,size_t size,char * data)47 db_read_bytes(vm_offset_t addr, size_t size, char *data)
48 {
49 jmp_buf jb;
50 void *prev_jb;
51 char *src;
52 int ret;
53
54 prev_jb = kdb_jmpbuf(jb);
55 ret = setjmp(jb);
56 if (ret == 0) {
57 src = (char *)addr;
58 while (size-- > 0)
59 *data++ = *src++;
60 }
61 (void)kdb_jmpbuf(prev_jb);
62 return (ret);
63 }
64
65 /*
66 * Write bytes to kernel address space for debugger.
67 * We need to disable write protection temporarily so we can write
68 * things (such as break points) that might be in write-protected
69 * memory.
70 */
71 int
db_write_bytes(vm_offset_t addr,size_t size,char * data)72 db_write_bytes(vm_offset_t addr, size_t size, char *data)
73 {
74 jmp_buf jb;
75 void *prev_jb;
76 char *dst;
77 bool old_wp;
78 int ret;
79
80 old_wp = false;
81 prev_jb = kdb_jmpbuf(jb);
82 ret = setjmp(jb);
83 if (ret == 0) {
84 old_wp = disable_wp();
85 dst = (char *)addr;
86 while (size-- > 0)
87 *dst++ = *data++;
88 }
89 restore_wp(old_wp);
90 (void)kdb_jmpbuf(prev_jb);
91 return (ret);
92 }
93
94 void
db_show_mdpcpu(struct pcpu * pc)95 db_show_mdpcpu(struct pcpu *pc)
96 {
97
98 db_printf("self = %p\n", pc->pc_prvspace);
99 db_printf("curpmap = %p\n", pc->pc_curpmap);
100 db_printf("tssp = %p\n", pc->pc_tssp);
101 db_printf("rsp0 = 0x%lx\n", pc->pc_rsp0);
102 db_printf("kcr3 = 0x%lx\n", pc->pc_kcr3);
103 db_printf("ucr3 = 0x%lx\n", pc->pc_ucr3);
104 db_printf("scr3 = 0x%lx\n", pc->pc_saved_ucr3);
105 db_printf("gs32p = %p\n", pc->pc_gs32p);
106 db_printf("ldt = %p\n", pc->pc_ldt);
107 db_printf("tss = %p\n", pc->pc_tss);
108 }
109