8  * Copyright (c) 1999-2006 Silicon Graphics, Inc.  All Rights Reserved.
32 int kdb_printf_cpu = -1;
41 		if (slen > 3 && buffer[slen - 3] == '#') {  in kgdb_transition_check()
52  * kdb_handle_escape() - validity check on an accumulated escape sequence.
58  * Return: -1 if the escape sequence is unwanted, 0 if it is incomplete,
59  * otherwise it returns a mapped key value to pass to the upper layers.
63 	char *lastkey = buf + sz - 1;  in kdb_handle_escape()
86 		case '1': /* \e[<1,3,4>], may be home, del, end */  in kdb_handle_escape()
96 			case '1': /* \e[1~, home */  in kdb_handle_escape()
107 	return -1;  in kdb_handle_escape()
111  * kdb_getchar() - Read a single character from a kdb console (or consoles).
116  * An escape key could be the start of a vt100 control sequence such as \e[D
123  * Return: The key pressed or a control code derived from an escape sequence.
133 	int key;  in kdb_getchar()  local
143 		key = (*f)();  in kdb_getchar()
144 		if (key == -1) {  in kdb_getchar()
147 				if (--escape_delay == 0)  in kdb_getchar()
159 		if (last_char_was_cr && key == '\n') {  in kdb_getchar()
163 		last_char_was_cr = (key == '\r');  in kdb_getchar()
176 		*pbuf++ = key;  in kdb_getchar()
177 		key = kdb_handle_escape(buf, pbuf - buf);  in kdb_getchar()
178 		if (key < 0) /* no escape sequence; return best character */  in kdb_getchar()
179 			return buf[pbuf - buf == 2 ? 1 : 0];  in kdb_getchar()
180 		if (key > 0)  in kdb_getchar()
181 			return key;  in kdb_getchar()
188  * kdb_position_cursor() - Place cursor in the correct horizontal position
189  * @prompt: Nil-terminated string containing the prompt string
190  * @buffer: Nil-terminated string containing the entire command line
194  * The cursor is positioned by sending a carriage-return and then printing
199  * Firstly, even though kdb_printf() will correctly format zero-width fields
211 		kdb_printf("%.*s", (int)(cp - buffer), buffer);  in kdb_position_cursor()
221  *	buffer	- Address of character buffer to receive input characters.
222  *	bufsize - size, in bytes, of the character buffer
229  *	function.  It is not reentrant - it relies on the fact
238 	char *bufend = buffer+bufsize-2;	/* Reserve space for newline  in kdb_read()
250 	int key, ret;  in kdb_read()  local
258 		if (*(buffer+len-1) == '\n')  in kdb_read()
259 			cp--;  in kdb_read()
266 	key = kdb_getchar();  in kdb_read()
267 	if (key != 9)  in kdb_read()
269 	switch (key) {  in kdb_read()
272 			memmove(cp-1, cp, lastchar - cp + 1);  in kdb_read()
273 			lastchar--;  in kdb_read()
274 			cp--;  in kdb_read()
291 			memmove(cp, cp+1, lastchar - cp);  in kdb_read()
292 			lastchar--;  in kdb_read()
297 	case 1: /* Home */  in kdb_read()
312 			--cp;  in kdb_read()
318 			   (int)(strlen(kdb_prompt_str) + (lastchar - buffer)),  in kdb_read()
320 		*lastchar = (char)key;  in kdb_read()
356 				if (ret != -E2BIG)  in kdb_read()
371 			len_tmp = strlen(tmpbuffer) - len;  in kdb_read()
373 				len_tmp = bufend - lastchar;  in kdb_read()
377 				memmove(cp+len_tmp, cp, (lastchar-cp) + 1);  in kdb_read()
390 		if (key >= 32 && lastchar < bufend) {  in kdb_read()
392 				memmove(cp+1, cp, lastchar - cp + 1);  in kdb_read()
394 				*cp = key;  in kdb_read()
400 				*cp++ = key;  in kdb_read()
409 					kdb_printf("%c", key);  in kdb_read()
413 			if (lastchar - buffer >= 5 &&  in kdb_read()
414 			    strcmp(lastchar - 5, "$?#3f") == 0) {  in kdb_read()
415 				kdb_gdb_state_pass(lastchar - 5);  in kdb_read()
420 			if (lastchar - buffer >= 11 &&  in kdb_read()
421 			    strcmp(lastchar - 11, "$qSupported") == 0) {  in kdb_read()
422 				kdb_gdb_state_pass(lastchar - 11);  in kdb_read()
484 		flush_delay--;  in kdb_input_flush()
489 			if (res != -1) {  in kdb_input_flush()
505  *	printf-like format and optional args.
511  *	use 'kdbcons->write()' to avoid polluting 'log_buf' with
537 	len1 = strlen(searched)-1;  in kdb_search_string()
547 		if (!strncmp(searched+len1-len2, searchfor, len2))  in kdb_search_string()
574 	while (len--) {  in kdb_msg_write()
575 		dbg_io_ops->write_char(*cp);  in kdb_msg_write()
581 	 * traversal. The use of the ->write() callback relies on all other  in kdb_msg_write()
594 		if (c == dbg_io_ops->cons)  in kdb_msg_write()
596 		if (!c->write)  in kdb_msg_write()
602 		 * due to re-entering the console driver. We operate directly on  in kdb_msg_write()
608 		c->write(c, msg, msg_len);  in kdb_msg_write()
609 		--oops_in_progress;  in kdb_msg_write()
635 		old_cpu = cmpxchg(&kdb_printf_cpu, -1, this_cpu);  in vkdb_printf()
636 		if (old_cpu == -1 || old_cpu == this_cpu)  in vkdb_printf()
666 	 * (vsnprintf does null-terminate the string that it generates)  in vkdb_printf()
680 			 *     (MOREPROMPT -> moreprompt)  in vkdb_printf()
708 			size_avail = sizeof(kdb_buffer) - len;  in vkdb_printf()
738 			size_avail = sizeof(kdb_buffer) - len;  in vkdb_printf()
745 			 * its original value to ensure multi-line strings  in vkdb_printf()
764 		gdbstub_msg_write(cp, retlen - (cp - kdb_buffer));  in vkdb_printf()
766 		kdb_msg_write(cp, retlen - (cp - kdb_buffer));  in vkdb_printf()
785 		while (len--) {  in vkdb_printf()
839 			kdb_nextline = linecount - 1;  in vkdb_printf()
878 		size_avail = sizeof(kdb_buffer) - len;  in vkdb_printf()