2 * Mach Operating System
3 * Copyright (c) 1991,1990 Carnegie Mellon University
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.
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.
16 * Carnegie Mellon requests users of this software to return to
18 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
19 * School of Computer Science
20 * Carnegie Mellon University
21 * Pittsburgh PA 15213-3890
23 * any improvements or extensions that they make and grant Carnegie the
24 * rights to redistribute these changes.
26 * $FreeBSD: src/sys/ddb/db_output.c,v 1.26 1999/08/28 00:41:09 peter Exp $
30 * Author: David B. Golub, Carnegie Mellon University
35 * Printf and character output for debugger.
38 #include <sys/param.h>
39 #include <sys/systm.h>
41 #include <sys/ctype.h>
42 #include <sys/thread2.h>
43 #include <sys/spinlock2.h>
45 #include <machine/stdarg.h>
48 #include <ddb/db_output.h>
51 * Character output - tracks position in line.
52 * To do this correctly, we should know how wide
53 * the output device is - then we could zero
54 * the line position when the output device wraps
55 * around to the start of the next line.
57 * Instead, we count the number of spaces printed
58 * since the last printing character so that we
59 * don't print trailing spaces. This avoids most
62 static int db_output_position
= 0; /* output column */
63 static int db_last_non_space
= 0; /* last non-space character */
64 db_expr_t db_tab_stop_width
= 8; /* how wide are tab stops? */
65 #define NEXT_TAB(i) rounddown((i) + db_tab_stop_width, db_tab_stop_width)
66 db_expr_t db_max_width
= 79; /* output line width */
68 static void db_putchar (int c
, void *arg
);
71 * Force pending whitespace.
74 db_force_whitespace(void)
76 int last_print
, next_tab
;
78 last_print
= db_last_non_space
;
79 while (last_print
< db_output_position
) {
80 next_tab
= NEXT_TAB(last_print
);
81 if (next_tab
<= db_output_position
) {
82 while (last_print
< next_tab
) { /* DON'T send a tab!!! */
92 db_last_non_space
= db_output_position
;
96 * Output character. Buffer whitespace.
99 * arg: character to output
102 db_putchar(int c
, void *arg
)
105 * If not in the debugger, output data to both the console and
106 * the message buffer.
109 if (c
== '\r' || c
== '\n' || c
== '\t' ||
117 if (c
== '\r' || c
== '\n')
118 db_check_interrupt();
124 if (c
> ' ' && c
<= '~') {
126 * Printing character.
127 * If we have spaces to print, print them first.
128 * Use tabs if possible.
130 db_force_whitespace();
132 db_output_position
++;
133 db_last_non_space
= db_output_position
;
135 else if (c
== '\n') {
138 db_output_position
= 0;
139 db_last_non_space
= 0;
140 db_check_interrupt();
142 else if (c
== '\r') {
145 db_output_position
= 0;
146 db_last_non_space
= 0;
147 db_check_interrupt();
149 else if (c
== '\t') {
150 /* assume tabs every 8 positions */
151 db_output_position
= NEXT_TAB(db_output_position
);
155 db_output_position
++;
157 else if (c
== '\007') {
161 /* other characters are assumed non-printing */
166 * Return output position
169 db_print_position(void)
171 return (db_output_position
);
177 * NOTE: We bypass subr_prf's cons_spin here by using our own putchar
181 db_printf(const char *fmt
, ...)
185 __va_start(listp
, fmt
);
186 kvcprintf (fmt
, db_putchar
, NULL
, listp
);
192 db_vprintf(const char *fmt
, __va_list va
)
194 kvcprintf (fmt
, db_putchar
, NULL
, va
);
201 db_iprintf(const char *fmt
,...)
206 for (i
= db_indent
; i
>= 8; i
-= 8)
210 __va_start(listp
, fmt
);
211 kvcprintf (fmt
, db_putchar
, NULL
, listp
);
216 * End line if too long.
219 db_end_line(int field_width
)
221 if (db_output_position
+ field_width
> db_max_width
)
235 db_printf("--More--");
239 * A whole screenfull or just one line?
242 case '\n': /* just one line */
246 *nl
= 0; /* another screenfull */
257 * Replacement for old '%r' kprintf format.
260 db_format_radix(char *buf
, size_t bufsiz
, quad_t val
, int altflag
)
264 if (db_radix
== 16) {
265 db_format_hex(buf
, bufsiz
, val
, altflag
);
270 fmt
= altflag
? "-%#qo" : "-%qo";
272 fmt
= altflag
? "-%#qu" : "-%qu";
279 ksnprintf(buf
, bufsiz
, fmt
, val
);
283 * Replacement for old '%z' kprintf format.
286 db_format_hex(char *buf
, size_t bufsiz
, quad_t val
, int altflag
)
288 /* Only use alternate form if val is nonzero. */
289 const char *fmt
= (altflag
&& val
) ? "-%#qx" : "-%qx";
296 ksnprintf(buf
, bufsiz
, fmt
, val
);
299 /* #define TEMPORARY_DEBUGGING */
300 #ifdef TEMPORARY_DEBUGGING
303 * Temporary Debugging, only turned on manually by kernel hackers trying
304 * to debug extremely low level code. Adjust PCHAR_ as required.
306 static void PCHAR_(int, void * __unused
);
309 kprintf0(const char *fmt
, ...)
314 kvcprintf(fmt
, PCHAR_
, NULL
, ap
);
319 PCHAR_(int c
, void *dummy __unused
)
321 const int COMC_TXWAIT
= 0x40000;
322 const int COMPORT
= 0x2f8; /* 0x3f8 COM1, 0x2f8 COM2 */
323 const int LSR_TXRDY
= 0x20;
324 const int BAUD
= 115200;
325 const int com_lsr
= 5;
326 const int com_data
= 0;
332 outb(COMPORT
+3, 0x83); /* DLAB + 8N1 */
333 outb(COMPORT
+0, (115200 / BAUD
) & 0xFF);
334 outb(COMPORT
+1, (115200 / BAUD
) >> 8);
335 outb(COMPORT
+3, 0x03); /* 8N1 */
336 outb(COMPORT
+4, 0x03); /* RTS+DTR */
337 outb(COMPORT
+2, 0x01); /* FIFO_ENABLE */
340 for (wait
= COMC_TXWAIT
; wait
> 0; wait
--) {
341 if (inb(COMPORT
+ com_lsr
) & LSR_TXRDY
) {
342 outb(COMPORT
+ com_data
, (u_char
)c
);