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subr_module.c (116182) subr_module.c (209390)
1/*-
2 * Copyright (c) 1998 Michael Smith
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

--- 11 unchanged lines hidden (view full) ---

20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
1/*-
2 * Copyright (c) 1998 Michael Smith
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

--- 11 unchanged lines hidden (view full) ---

20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: head/sys/kern/subr_module.c 116182 2003-06-11 00:56:59Z obrien $");
28__FBSDID("$FreeBSD: head/sys/kern/subr_module.c 209390 2010-06-21 09:55:56Z ed $");
29
30#include <sys/param.h>
31#include <sys/systm.h>
32#include <sys/linker.h>
33
34/*
35 * Preloaded module support
36 */
37
38caddr_t preload_metadata;
39
40/*
41 * Search for the preloaded module (name)
42 */
43caddr_t
44preload_search_by_name(const char *name)
45{
46 caddr_t curp;
29
30#include <sys/param.h>
31#include <sys/systm.h>
32#include <sys/linker.h>
33
34/*
35 * Preloaded module support
36 */
37
38caddr_t preload_metadata;
39
40/*
41 * Search for the preloaded module (name)
42 */
43caddr_t
44preload_search_by_name(const char *name)
45{
46 caddr_t curp;
47 u_int32_t *hdr;
47 uint32_t *hdr;
48 int next;
49
50 if (preload_metadata != NULL) {
51
52 curp = preload_metadata;
53 for (;;) {
48 int next;
49
50 if (preload_metadata != NULL) {
51
52 curp = preload_metadata;
53 for (;;) {
54 hdr = (u_int32_t *)curp;
54 hdr = (uint32_t *)curp;
55 if (hdr[0] == 0 && hdr[1] == 0)
56 break;
57
58 /* Search for a MODINFO_NAME field */
59 if ((hdr[0] == MODINFO_NAME) &&
55 if (hdr[0] == 0 && hdr[1] == 0)
56 break;
57
58 /* Search for a MODINFO_NAME field */
59 if ((hdr[0] == MODINFO_NAME) &&
60 !strcmp(name, curp + sizeof(u_int32_t) * 2))
60 !strcmp(name, curp + sizeof(uint32_t) * 2))
61 return(curp);
62
63 /* skip to next field */
61 return(curp);
62
63 /* skip to next field */
64 next = sizeof(u_int32_t) * 2 + hdr[1];
64 next = sizeof(uint32_t) * 2 + hdr[1];
65 next = roundup(next, sizeof(u_long));
66 curp += next;
67 }
68 }
69 return(NULL);
70}
71
72/*
73 * Search for the first preloaded module of (type)
74 */
75caddr_t
76preload_search_by_type(const char *type)
77{
78 caddr_t curp, lname;
65 next = roundup(next, sizeof(u_long));
66 curp += next;
67 }
68 }
69 return(NULL);
70}
71
72/*
73 * Search for the first preloaded module of (type)
74 */
75caddr_t
76preload_search_by_type(const char *type)
77{
78 caddr_t curp, lname;
79 u_int32_t *hdr;
79 uint32_t *hdr;
80 int next;
81
82 if (preload_metadata != NULL) {
83
84 curp = preload_metadata;
85 lname = NULL;
86 for (;;) {
80 int next;
81
82 if (preload_metadata != NULL) {
83
84 curp = preload_metadata;
85 lname = NULL;
86 for (;;) {
87 hdr = (u_int32_t *)curp;
87 hdr = (uint32_t *)curp;
88 if (hdr[0] == 0 && hdr[1] == 0)
89 break;
90
91 /* remember the start of each record */
92 if (hdr[0] == MODINFO_NAME)
93 lname = curp;
94
95 /* Search for a MODINFO_TYPE field */
96 if ((hdr[0] == MODINFO_TYPE) &&
88 if (hdr[0] == 0 && hdr[1] == 0)
89 break;
90
91 /* remember the start of each record */
92 if (hdr[0] == MODINFO_NAME)
93 lname = curp;
94
95 /* Search for a MODINFO_TYPE field */
96 if ((hdr[0] == MODINFO_TYPE) &&
97 !strcmp(type, curp + sizeof(u_int32_t) * 2))
97 !strcmp(type, curp + sizeof(uint32_t) * 2))
98 return(lname);
99
100 /* skip to next field */
98 return(lname);
99
100 /* skip to next field */
101 next = sizeof(u_int32_t) * 2 + hdr[1];
101 next = sizeof(uint32_t) * 2 + hdr[1];
102 next = roundup(next, sizeof(u_long));
103 curp += next;
104 }
105 }
106 return(NULL);
107}
108
109/*
110 * Walk through the preloaded module list
111 */
112caddr_t
113preload_search_next_name(caddr_t base)
114{
115 caddr_t curp;
102 next = roundup(next, sizeof(u_long));
103 curp += next;
104 }
105 }
106 return(NULL);
107}
108
109/*
110 * Walk through the preloaded module list
111 */
112caddr_t
113preload_search_next_name(caddr_t base)
114{
115 caddr_t curp;
116 u_int32_t *hdr;
116 uint32_t *hdr;
117 int next;
118
119 if (preload_metadata != NULL) {
120
121 /* Pick up where we left off last time */
122 if (base) {
123 /* skip to next field */
124 curp = base;
117 int next;
118
119 if (preload_metadata != NULL) {
120
121 /* Pick up where we left off last time */
122 if (base) {
123 /* skip to next field */
124 curp = base;
125 hdr = (u_int32_t *)curp;
126 next = sizeof(u_int32_t) * 2 + hdr[1];
125 hdr = (uint32_t *)curp;
126 next = sizeof(uint32_t) * 2 + hdr[1];
127 next = roundup(next, sizeof(u_long));
128 curp += next;
129 } else
130 curp = preload_metadata;
131
132 for (;;) {
127 next = roundup(next, sizeof(u_long));
128 curp += next;
129 } else
130 curp = preload_metadata;
131
132 for (;;) {
133 hdr = (u_int32_t *)curp;
133 hdr = (uint32_t *)curp;
134 if (hdr[0] == 0 && hdr[1] == 0)
135 break;
136
137 /* Found a new record? */
138 if (hdr[0] == MODINFO_NAME)
139 return curp;
140
141 /* skip to next field */
134 if (hdr[0] == 0 && hdr[1] == 0)
135 break;
136
137 /* Found a new record? */
138 if (hdr[0] == MODINFO_NAME)
139 return curp;
140
141 /* skip to next field */
142 next = sizeof(u_int32_t) * 2 + hdr[1];
142 next = sizeof(uint32_t) * 2 + hdr[1];
143 next = roundup(next, sizeof(u_long));
144 curp += next;
145 }
146 }
147 return(NULL);
148}
149
150/*
151 * Given a preloaded module handle (mod), return a pointer
152 * to the data for the attribute (inf).
153 */
154caddr_t
155preload_search_info(caddr_t mod, int inf)
156{
157 caddr_t curp;
143 next = roundup(next, sizeof(u_long));
144 curp += next;
145 }
146 }
147 return(NULL);
148}
149
150/*
151 * Given a preloaded module handle (mod), return a pointer
152 * to the data for the attribute (inf).
153 */
154caddr_t
155preload_search_info(caddr_t mod, int inf)
156{
157 caddr_t curp;
158 u_int32_t *hdr;
159 u_int32_t type = 0;
158 uint32_t *hdr;
159 uint32_t type = 0;
160 int next;
161
162 curp = mod;
163 for (;;) {
160 int next;
161
162 curp = mod;
163 for (;;) {
164 hdr = (u_int32_t *)curp;
164 hdr = (uint32_t *)curp;
165 /* end of module data? */
166 if (hdr[0] == 0 && hdr[1] == 0)
167 break;
168 /*
169 * We give up once we've looped back to what we were looking at
170 * first - this should normally be a MODINFO_NAME field.
171 */
172 if (type == 0) {

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177 }
178
179 /*
180 * Attribute match? Return pointer to data.
181 * Consumer may safely assume that size value precedes
182 * data.
183 */
184 if (hdr[0] == inf)
165 /* end of module data? */
166 if (hdr[0] == 0 && hdr[1] == 0)
167 break;
168 /*
169 * We give up once we've looped back to what we were looking at
170 * first - this should normally be a MODINFO_NAME field.
171 */
172 if (type == 0) {

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177 }
178
179 /*
180 * Attribute match? Return pointer to data.
181 * Consumer may safely assume that size value precedes
182 * data.
183 */
184 if (hdr[0] == inf)
185 return(curp + (sizeof(u_int32_t) * 2));
185 return(curp + (sizeof(uint32_t) * 2));
186
187 /* skip to next field */
186
187 /* skip to next field */
188 next = sizeof(u_int32_t) * 2 + hdr[1];
188 next = sizeof(uint32_t) * 2 + hdr[1];
189 next = roundup(next, sizeof(u_long));
190 curp += next;
191 }
192 return(NULL);
193}
194
195/*
196 * Delete a preload record by name.
197 */
198void
199preload_delete_name(const char *name)
200{
201 caddr_t curp;
189 next = roundup(next, sizeof(u_long));
190 curp += next;
191 }
192 return(NULL);
193}
194
195/*
196 * Delete a preload record by name.
197 */
198void
199preload_delete_name(const char *name)
200{
201 caddr_t curp;
202 u_int32_t *hdr;
202 uint32_t *hdr;
203 int next;
204 int clearing;
205
206 if (preload_metadata != NULL) {
207
208 clearing = 0;
209 curp = preload_metadata;
210 for (;;) {
203 int next;
204 int clearing;
205
206 if (preload_metadata != NULL) {
207
208 clearing = 0;
209 curp = preload_metadata;
210 for (;;) {
211 hdr = (u_int32_t *)curp;
211 hdr = (uint32_t *)curp;
212 if (hdr[0] == 0 && hdr[1] == 0)
213 break;
214
215 /* Search for a MODINFO_NAME field */
216 if (hdr[0] == MODINFO_NAME) {
212 if (hdr[0] == 0 && hdr[1] == 0)
213 break;
214
215 /* Search for a MODINFO_NAME field */
216 if (hdr[0] == MODINFO_NAME) {
217 if (!strcmp(name, curp + sizeof(u_int32_t) * 2))
217 if (!strcmp(name, curp + sizeof(uint32_t) * 2))
218 clearing = 1; /* got it, start clearing */
219 else if (clearing)
220 clearing = 0; /* at next one now.. better stop */
221 }
222 if (clearing)
223 hdr[0] = MODINFO_EMPTY;
224
225 /* skip to next field */
218 clearing = 1; /* got it, start clearing */
219 else if (clearing)
220 clearing = 0; /* at next one now.. better stop */
221 }
222 if (clearing)
223 hdr[0] = MODINFO_EMPTY;
224
225 /* skip to next field */
226 next = sizeof(u_int32_t) * 2 + hdr[1];
226 next = sizeof(uint32_t) * 2 + hdr[1];
227 next = roundup(next, sizeof(u_long));
228 curp += next;
229 }
230 }
231}
232
233/* Called from locore on i386. Convert physical pointers to kvm. Sigh. */
234void
235preload_bootstrap_relocate(vm_offset_t offset)
236{
237 caddr_t curp;
227 next = roundup(next, sizeof(u_long));
228 curp += next;
229 }
230 }
231}
232
233/* Called from locore on i386. Convert physical pointers to kvm. Sigh. */
234void
235preload_bootstrap_relocate(vm_offset_t offset)
236{
237 caddr_t curp;
238 u_int32_t *hdr;
238 uint32_t *hdr;
239 vm_offset_t *ptr;
240 int next;
241
242 if (preload_metadata != NULL) {
243
244 curp = preload_metadata;
245 for (;;) {
239 vm_offset_t *ptr;
240 int next;
241
242 if (preload_metadata != NULL) {
243
244 curp = preload_metadata;
245 for (;;) {
246 hdr = (u_int32_t *)curp;
246 hdr = (uint32_t *)curp;
247 if (hdr[0] == 0 && hdr[1] == 0)
248 break;
249
250 /* Deal with the ones that we know we have to fix */
251 switch (hdr[0]) {
252 case MODINFO_ADDR:
253 case MODINFO_METADATA|MODINFOMD_SSYM:
254 case MODINFO_METADATA|MODINFOMD_ESYM:
247 if (hdr[0] == 0 && hdr[1] == 0)
248 break;
249
250 /* Deal with the ones that we know we have to fix */
251 switch (hdr[0]) {
252 case MODINFO_ADDR:
253 case MODINFO_METADATA|MODINFOMD_SSYM:
254 case MODINFO_METADATA|MODINFOMD_ESYM:
255 ptr = (vm_offset_t *)(curp + (sizeof(u_int32_t) * 2));
255 ptr = (vm_offset_t *)(curp + (sizeof(uint32_t) * 2));
256 *ptr += offset;
257 break;
258 }
259 /* The rest is beyond us for now */
260
261 /* skip to next field */
256 *ptr += offset;
257 break;
258 }
259 /* The rest is beyond us for now */
260
261 /* skip to next field */
262 next = sizeof(u_int32_t) * 2 + hdr[1];
262 next = sizeof(uint32_t) * 2 + hdr[1];
263 next = roundup(next, sizeof(u_long));
264 curp += next;
265 }
266 }
267}
263 next = roundup(next, sizeof(u_long));
264 curp += next;
265 }
266 }
267}