source: trunk/minix/commands/mdb/misc.c@ 12

Last change on this file since 12 was 9, checked in by Mattia Monga, 14 years ago

Minix 3.1.2a
File size: 7.2 KB
Line 
1/*
2 * misc.c for mdb
3 */
4
5#include "mdb.h"
6#include <ctype.h>
7#include <stdio.h>
8#include <stdlib.h>
9#include <sys/stat.h>
10#define ptrace mdbtrace
11#include <sys/ptrace.h>
12#include "proto.h"
13
14FORWARD _PROTOTYPE( void pr_ascii , (long val , int size ));
15
16/* Print ascii */
17PRIVATE void pr_ascii(val, size)
18long val;
19int size;
20{
21 int i;
22 int v;
23 int sh;
24
25#ifdef BYTES_SWAPPED
26 sh = 8 * size;
27#else
28 sh = 0;
29#endif
30
31 for (i = 0; i < size; i++) {
32 v = (int) (val >> sh) & 0xFF;
33#ifdef BYTES_SWAPPED
34 sh -= 8;
35#else
36 sh += 8;
37#endif
38 Printf(isprint(v) ? "%c" : "\\%03o", v);
39 }
40 Printf("\n");
41}
42
43/* Dump stack */
44PUBLIC void dump_stack(cnt)
45long cnt;
46{
47 vir_bytes v, vi;
48 long val, sp;
49 int num, size, nmode;
50
51 size = INTSIZE; /* size of stack element */
52 num = (int) cnt;
53 if (num <= 0) num = 0;
54 if (num > sk_size) num = (int) sk_size / size;
55 nmode = num; /* Save mode */
56
57 /* Get current SP */
58 sp = get_reg(curpid, reg_addr("sp"));
59
60 /* Starting address is top of stack seg -1 */
61 vi = (vir_bytes) sk_addr + (vir_bytes) sk_size - size;
62
63 /* Ending address */
64 v = (vir_bytes) end_addr;
65 if (nmode == 0) v = MAX(v, sp);
66
67 Printf("Stack Dump SP=%*lx\nAddr\tHex\tAscii\n", 2 * size, sp);
68 do {
69 val = (ptrace(T_GETDATA, curpid, (long) vi, 0L) >> SHIFT(size))
70 & MASK(size);
71 Printf("%*lx\t", 2 * ADDRSIZE, (vi >> SHIFT(ADDRSIZE))
72 & MASK(ADDRSIZE));
73 Printf("%*lx\t", 2 * size, val);
74 pr_ascii(val, size);
75 num -= 1;
76 vi -= size;
77 } while (vi >= v && (nmode ? num > 0 : 1));
78
79}
80
81
82/* Get file size */
83PUBLIC off_t file_size(fd)
84int fd;
85{
86struct stat st;
87
88 if(fstat(fd,&st) <0 ) {
89 Printf("Cannot stat\n");
90 return 0L;
91 }
92 else
93 return st.st_size;
94}
95
96/* Print help page */
97PUBLIC void help_page()
98{
99 outstr("\nHelp for mdb. For more details, type 'command ?'\n");
100 outstr("!#\t- Shell escape / Set Variable or register\n");
101 outstr("Tt\t- Current call / Backtrace all\n");
102 outstr("/nsf\t- Display for n size s with format f\n");
103 outstr("Xx [n]\t- Disasm / & display reg for n instructions\n");
104 outstr("Rr a\t- Run / with arguments a\n");
105 outstr("Cc [n]\t- Continue with current signal / no signal n times\n");
106 outstr("Ii [n]\t- Single step with / no signal for n instructions\n");
107 outstr("Mm t n\t- Trace until / Stop when modified t type for n instructions\n");
108 outstr("k \t- Kill traced process\n");
109 outstr("Bb\t- Display / Set Break-pt\n");
110 outstr("Dd\t- Delete all / one break-points\n");
111 outstr("P\t- Toggle Paging\n");
112 outstr("Ll name\t- Log to file name / and to standard output\n");
113#ifdef DEBUG
114 outstr("Vv\t- Version info / Toggle debug flag\n");
115#else
116 outstr("V\t- Version info\n");
117#endif
118 outstr("e [t]\t- List symbols for type t\n");
119 outstr("y\t- Print segment mappings\n");
120 outstr("s [n]\t- Dump stack for n words\n");
121#if SYSCALLS_SUPPORT
122 outstr("z [a]\t- Trace syscalls with address a\n");
123#endif
124 outstr("? \t- Help - this screen\n");
125 outstr("@ file\t- Execute commands from file\n");
126 outstr("Qq\t- Quit / and kill traced process\n");
127#ifdef DEBUG
128 outstr("Usage: mdb -x debug-level [-Ll]logfile exec-file core-file @command-file\n");
129#else
130 outstr("Usage: mdb [-Ll]logfile exec-file core-file @command-file\n");
131#endif
132 outstr(" mdb [-fc] file\n");
133}
134
135PUBLIC void version_info()
136{
137 Printf("\nmdb version %s.%d for Minix", MDBVERSION, MDBBUILD );
138 Printf(" %s.%s", OS_RELEASE, OS_VERSION);
139#ifdef MINIX_PC
140#ifdef __i386
141 Printf(" (32-bit)");
142#else
143 Printf(" (16-bit)");
144#endif
145#endif
146#ifdef MINIX_ST
147 Printf("-ST");
148#endif
149 Printf("\n");
150}
151
152/* Print help message on command */
153PUBLIC void help_on(h)
154int h;
155{
156
157 switch (h) {
158 case '/':
159 outstr("<address> /nsf\t- Display for n items of size s with format f from address\n");
160 outstr("\t n defaults to 1\n");
161 outstr("\t s defaults to size of int\n");
162 outstr("\t can be b for byte h for short l for long\n");
163 outstr("\t f defaults to d for decimal\n");
164 outstr("\t can be x X o d D c s or u as in printf\n");
165 outstr("\t y treat value as address\n");
166 outstr("\t i disasm\n");
167 break;
168 case '@':
169 outstr("@ file\t- Execute commands from file\n");
170 break;
171 case '#':
172 outstr("# <address> cs value\t- Set Variable(s) at address to value\n");
173 outstr("\t\t\t for c count and size s\n");
174 outstr("\t\t\t b for byte h for short or l for long\n");
175 outstr("\t\t\t Count or size must be specified\n");
176 outstr("# $xx value\t\t- Set register $xx to value\n");
177 break;
178 case 'C':
179 outstr("C [n]\t- Continue with curent signal n times\n");
180 outstr("\t n defaults to 1\n");
181 break;
182 case 'c':
183 outstr("c [n]\t- Continue with no signal n times\n");
184 outstr("\t n defaults to 1\n");
185 break;
186 case 'e':
187 outstr("e [t]\t- List symbols for type t\n");
188 break;
189 case 's':
190 outstr("s [n]\t- Dump stack for n words\n");
191 outstr("\t n defaults to whole stack\n");
192 break;
193 case 'I':
194 outstr("I n\t- Single step with signal for n instructions n defaults to 1\n");
195 break;
196 case 'i':
197 outstr("i n\t- Single step with no signal for n instructions n defaults to 1\n");
198 break;
199 case 'M':
200 case 'm':
201 if ( h == 'M')
202 outstr("<address> M t n\t- Trace until\n");
203 else
204 outstr("<address> m t n\t- Stop when\n");
205 outstr("\t\t<address> is modified t type for n instructions\n");
206 outstr("\t\tn defaults to 1\n");
207 outstr("\t\tb for byte h for short l for long defaults to size of int\n");
208 break;
209 case 'T':
210 outstr("T\t- Display current call\n");
211 break;
212 case 't':
213 outstr("t\t- Backtrace all calls\n");
214 break;
215 case '!':
216 outstr("![command]\t- Shell escape or spawn command\n");
217 break;
218 case 'R':
219 outstr("R\t- Run the exec-file\n");
220 break;
221 case 'r':
222 outstr("r [arguments]\t- Run the exec-file with arguments\n");
223 break;
224 case 'k':
225 outstr("k\t- Kill traced process\n");
226 break;
227 case 'B':
228 outstr("B\t- Display all the Break points\n");
229 break;
230 case 'b':
231 outstr("<address> b [commands]\t- Set Break-pt at address\n");
232 outstr("\t\t\t commands will be executed by mdb at break-pt\n");
233 break;
234 case 'D':
235 outstr("D\t- Delete all break-points\n");
236 break;
237 case 'd':
238 outstr("<address> d\t- Delete one break-point at address\n");
239 break;
240 case 'q':
241 outstr("q\t- Quit mdb (and kill traced program)\n");
242 break;
243 case 'Q':
244 outstr("Q\t- Quit mdb immediately\n");
245 break;
246 case 'P':
247 outstr("P\t- Toggle Paging\n");
248 outstr("\t Defaults is OFF\n");
249 break;
250 case 'L':
251 outstr("L name\t- Log to file name\n");
252 outstr("L\t- Reset output to standard output\n");
253 break;
254 case 'l':
255 outstr("l name\t- Log to file name and standard output\n");
256 outstr("l\t- Reset output to standard output\n");
257 outstr("\t Defaults to none\n");
258 break;
259#ifdef DEBUG
260 case 'v':
261 outstr("v\t- Toggle debug flag\n");
262 break;
263#endif
264 case 'V':
265 outstr("V\t- Print Version Information for mdb\n");
266 break;
267 case 'X':
268 outstr("<address> X [n] [offset]\t- Disasm for n instructions\n");
269 outstr("\t\t\t Starting at address+offset\n");
270 break;
271 case 'x':
272 outstr("<address> x [n] offset\t- Disasm & display registers for n instructions\n");
273 outstr("\t\t\t Starting at address+offset\n");
274 break;
275 case 'y':
276 outstr("y\t- Print segment mappings\n");
277 break;
278#if SYSCALLS_SUPPORT
279 case 'z':
280 outstr("z [address]\t- Trace system calls using address\n");
281 outstr("\t\t If the exec-file has symbols, mdb looks for __sendrec\n");
282 break;
283#endif
284 default:
285 Printf("No help on command '%c' is available\n",h);
286 break;
287 }
288}
289
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