xref: /titanic_52/usr/src/uts/common/krtld/kobj_bootflags.c (revision 25c28e83beb90e7c80452a7c818c5e6f73a07dc8)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 /*
22  * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  */
25 
26 
27 #include <sys/types.h>
28 #include <sys/reboot.h>
29 #include <sys/cmn_err.h>
30 #include <sys/bootconf.h>
31 #include <sys/promif.h>
32 #include <sys/obpdefs.h>
33 #include <sys/sunddi.h>
34 #include <sys/systm.h>
35 #include <sys/kobj.h>
36 #include <sys/kobj_impl.h>
37 #include <util/getoptstr.h>
38 
39 char *kobj_kmdb_argv[11];	/* 10 arguments and trailing NULL */
40 
41 /*
42  * Parse the boot line to determine boot flags.
43  */
44 void
45 bootflags(struct bootops *ops)
46 {
47 	struct gos_params params;
48 	uchar_t num_O_opt = 0;
49 	char *cp;
50 	int c;
51 	char scratch[BOOTARGS_MAX];
52 
53 	if (BOP_GETPROP(ops, "bootargs", kern_bootargs) == -1) {
54 		boothowto |= RB_ASKNAME;
55 		return;
56 	}
57 
58 	(void) BOP_GETPROP(ops, "boot-file", kern_bootfile);
59 
60 	cp = kern_bootargs;
61 
62 #if defined(_OBP)
63 	/*
64 	 * Sparc only, _OBP isn't defined on x86 any more.
65 	 */
66 	if (cp[0] != '-') {
67 		/* if user booted kadb or kmdb, load kmdb */
68 		if (cp[0] == 'k' && (cp[1] == 'a' || cp[1] == 'm') &&
69 		    cp[2] == 'd' && cp[3] == 'b' &&
70 		    (cp[4] == ' ' || cp[4] == '	' || cp[4] == 0))
71 			boothowto |= RB_KMDB;
72 		SKIP_WORD(cp);		/* Skip the kernel's filename. */
73 	}
74 #endif
75 	SKIP_SPC(cp);
76 
77 #if defined(_OBP)
78 	/* skip bootblk args */
79 	params.gos_opts = "abcdDf:F:gGHhi:km:o:O:rsvVwxZ:";
80 #else
81 	params.gos_opts = "abcdgGhi:km:O:rsvwx";
82 #endif
83 	params.gos_strp = cp;
84 	getoptstr_init(&params);
85 	while ((c = getoptstr(&params)) != -1) {
86 
87 		switch (c) {
88 		case 'a':
89 			boothowto |= RB_ASKNAME;
90 			break;
91 		case 'b':
92 			boothowto |= RB_NOBOOTRC;
93 			break;
94 		case 'c':
95 			boothowto |= RB_CONFIG;
96 			break;
97 		case 'd':
98 			boothowto |= RB_DEBUGENTER;
99 			break;
100 #if defined(_OBP)
101 		case 'D':
102 		case 'F':
103 			break;
104 		case 'f':
105 			(void) prom_setprop(prom_optionsnode(), "diag-level",
106 			    (char *)params.gos_optargp,
107 			    params.gos_optarglen + 1);
108 			break;
109 #endif
110 		case 'g':
111 			boothowto |= RB_FORTHDEBUG;
112 			break;
113 		case 'G':
114 			boothowto |= RB_FORTHDEBUGDBP;
115 			break;
116 		case 'h':
117 			boothowto |= RB_HALT;
118 			break;
119 #if defined(_OBP)
120 		case 'H':
121 			break;
122 #endif
123 		case 'i':
124 			if (params.gos_optarglen + 1 > sizeof (initname)) {
125 				_kobj_printf(ops, "krtld: initname too long.  "
126 				    "Ignoring.\n");
127 			} else {
128 				(void) strncpy(initname, params.gos_optargp,
129 				    params.gos_optarglen);
130 				initname[params.gos_optarglen] = '\0';
131 			}
132 			break;
133 		case 'k':
134 			boothowto |= RB_KMDB;
135 			break;
136 		case 'm':
137 			if (strlen(initargs) + 3 + params.gos_optarglen + 1 >
138 			    sizeof (initargs)) {
139 				_kobj_printf(ops,
140 				    "unix: init options too long.  "
141 				    "Ignoring -m.\n");
142 				break;
143 			}
144 			/* gos_optargp is not null terminated */
145 			(void) strncpy(scratch, params.gos_optargp,
146 			    params.gos_optarglen);
147 			scratch[params.gos_optarglen] = '\0';
148 			(void) strlcat(initargs, "-m ", sizeof (initargs));
149 			(void) strlcat(initargs, scratch,
150 			    sizeof (initargs));
151 			(void) strlcat(initargs, " ", sizeof (initargs));
152 			break;
153 #if defined(_OBP)
154 		/* Ignore argument meant for wanboot standalone */
155 		case 'o':
156 			break;
157 #endif
158 		case 'O': {
159 			char **str = &kobj_kmdb_argv[num_O_opt];
160 
161 			if (++num_O_opt > (sizeof (kobj_kmdb_argv) /
162 			    sizeof (char *)) - 1) {
163 				_kobj_printf(ops, "krtld: too many kmdb "
164 				    "options - ignoring option #%d.\n",
165 				    num_O_opt);
166 				continue;
167 			}
168 
169 			*str = kobj_alloc(params.gos_optarglen + 1, KM_TMP);
170 			(void) strncpy(*str, params.gos_optargp,
171 			    params.gos_optarglen);
172 			(*str)[params.gos_optarglen] = '\0';
173 			break;
174 		}
175 		case 'r':
176 			if (strlen(initargs) + 3 + 1 > sizeof (initargs)) {
177 				_kobj_printf(ops, "unix: init options too "
178 				    "long.  Ignoring -r.\n");
179 				break;
180 			}
181 			boothowto |= RB_RECONFIG;
182 			(void) strlcat(initargs, "-r ", sizeof (initargs));
183 			break;
184 		case 's':
185 			if (strlen(initargs) + 3 + 1 > sizeof (initargs)) {
186 				_kobj_printf(ops, "unix: init options too "
187 				    "long.  Ignoring -s.\n");
188 				break;
189 			}
190 			boothowto |= RB_SINGLE;
191 			(void) strlcat(initargs, "-s ", sizeof (initargs));
192 			break;
193 		case 'v':
194 			if (strlen(initargs) + 3 + 1 > sizeof (initargs)) {
195 				_kobj_printf(ops, "unix: init options too "
196 				    "long.  Ignoring -v.\n");
197 				break;
198 			}
199 			boothowto |= RB_VERBOSE;
200 			(void) strlcat(initargs, "-v ", sizeof (initargs));
201 			break;
202 #if defined(_OBP)
203 		case 'V':
204 			break;
205 		case 'Z':
206 			break;
207 #endif
208 		case 'w':
209 			boothowto |= RB_WRITABLE;
210 			break;
211 		case 'x':
212 			boothowto |= RB_NOBOOTCLUSTER;
213 			break;
214 		case '?':
215 			switch (params.gos_last_opt) {
216 			case 'i':
217 				_kobj_printf(ops, "krtld: Required argument "
218 				    "for -i flag missing.  Ignoring.\n");
219 				break;
220 			default:
221 				_kobj_printf(ops, "krtld: Ignoring invalid "
222 				    "kernel option -%c.\n",
223 				    params.gos_last_opt);
224 			}
225 			break;
226 		default:
227 			_kobj_printf(ops, "krtld: Ignoring unimplemented "
228 			    "option -%c.\n", c);
229 		}
230 	}
231 
232 	if ((boothowto & (RB_DEBUGENTER | RB_KMDB)) == RB_DEBUGENTER) {
233 		_kobj_printf(ops, "krtld: -d is not valid without -k.\n");
234 		boothowto &= ~RB_DEBUGENTER;
235 	}
236 
237 	if (*params.gos_strp) {
238 		/* Unused arguments. */
239 		if (params.gos_strp[0] == '-' && ISSPACE(params.gos_strp[1])) {
240 			/*EMPTY*/
241 			/* Lousy install arguments.  Silently ignore. */
242 		} else {
243 			_kobj_printf(ops, "krtld: Unused kernel arguments: "
244 			    "`%s'.\n", params.gos_strp);
245 		}
246 	}
247 }
248