source: mainline/kernel/generic/src/main/kinit.c@ 5861b60

Last change on this file since 5861b60 was 40eab9f, checked in by Jiří Zárevúcky <zarevucky.jiri@…>, 20 months ago

Print symbol names and line numbers in stacktraces for init tasks

Only useful in select few situations, but useful nonetheless.
  • Property mode set to 100644
File size: 8.4 KB
Line 
1/*
2 * Copyright (c) 2001-2004 Jakub Jermar
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 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/** @addtogroup kernel_generic
30 * @{
31 */
32
33/**
34 * @file
35 * @brief Kernel initialization thread.
36 *
37 * This file contains kinit kernel thread which carries out
38 * high level system initialization.
39 *
40 * This file is responsible for finishing SMP configuration
41 * and creation of userspace init tasks.
42 */
43
44#include <assert.h>
45#include <main/kinit.h>
46#include <config.h>
47#include <arch.h>
48#include <proc/scheduler.h>
49#include <proc/task.h>
50#include <proc/thread.h>
51#include <proc/program.h>
52#include <panic.h>
53#include <halt.h>
54#include <cpu.h>
55#include <arch/asm.h>
56#include <mm/page.h>
57#include <arch/mm/page.h>
58#include <mm/as.h>
59#include <mm/frame.h>
60#include <mm/km.h>
61#include <stdio.h>
62#include <log.h>
63#include <memw.h>
64#include <console/console.h>
65#include <interrupt.h>
66#include <console/kconsole.h>
67#include <security/perm.h>
68#include <lib/rd.h>
69#include <ipc/ipc.h>
70#include <str.h>
71#include <str_error.h>
72#include <sysinfo/stats.h>
73#include <sysinfo/sysinfo.h>
74#include <align.h>
75#include <stdlib.h>
76#include <debug/register.h>
77
78#ifdef CONFIG_SMP
79#include <smp/smp.h>
80#endif /* CONFIG_SMP */
81
82#include <synch/waitq.h>
83#include <synch/spinlock.h>
84
85#define ALIVE_CHARS 4
86
87#ifdef CONFIG_KCONSOLE
88static char alive[ALIVE_CHARS] = "-\\|/";
89#endif
90
91#define INIT_PREFIX "init:"
92#define INIT_PREFIX_LEN 5
93
94/** Kernel initialization thread.
95 *
96 * kinit takes care of higher level kernel
97 * initialization (i.e. thread creation,
98 * userspace initialization etc.).
99 *
100 * @param arg Not used.
101 */
102void kinit(void *arg)
103{
104 thread_t *thread;
105
106 interrupts_disable();
107
108#ifdef CONFIG_SMP
109 if (config.cpu_count > 1) {
110 semaphore_initialize(&ap_completion_semaphore, 0);
111
112 /*
113 * Create the kmp thread and wait for its completion.
114 * cpu1 through cpuN-1 will come up consecutively and
115 * not mess together with kcpulb threads.
116 * Just a beautification.
117 */
118 thread = thread_create(kmp, NULL, TASK,
119 THREAD_FLAG_UNCOUNTED, "kmp");
120 if (!thread)
121 panic("Unable to create kmp thread.");
122
123 thread_wire(thread, &cpus[0]);
124 thread_ready(thread_ref(thread));
125 thread_join(thread);
126 thread_put(thread);
127
128 /*
129 * For each CPU, create its load balancing thread.
130 */
131 unsigned int i;
132
133 for (i = 0; i < config.cpu_count; i++) {
134 thread = thread_create(kcpulb, NULL, TASK,
135 THREAD_FLAG_UNCOUNTED, "kcpulb");
136 if (thread != NULL) {
137 thread_wire(thread, &cpus[i]);
138 thread_ready(thread);
139 } else
140 log(LF_OTHER, LVL_ERROR,
141 "Unable to create kcpulb thread for cpu%u", i);
142 }
143 }
144#endif /* CONFIG_SMP */
145
146 /*
147 * At this point SMP, if present, is configured.
148 */
149 ARCH_OP(post_smp_init);
150
151 /* Start thread computing system load */
152 thread = thread_create(kload, NULL, TASK, THREAD_FLAG_NONE,
153 "kload");
154 if (thread != NULL)
155 thread_ready(thread);
156 else
157 log(LF_OTHER, LVL_ERROR, "Unable to create kload thread");
158
159#ifdef CONFIG_KCONSOLE
160 if (stdin) {
161 /*
162 * Create kernel console.
163 */
164 thread = thread_create(kconsole_thread, NULL, TASK,
165 THREAD_FLAG_NONE, "kconsole");
166 if (thread != NULL)
167 thread_ready(thread);
168 else
169 log(LF_OTHER, LVL_ERROR,
170 "Unable to create kconsole thread");
171 }
172#endif /* CONFIG_KCONSOLE */
173
174 /*
175 * Store the default stack size in sysinfo so that uspace can create
176 * stack with this default size.
177 */
178 sysinfo_set_item_val("default.stack_size", NULL, STACK_SIZE_USER);
179
180 interrupts_enable();
181
182 /*
183 * Create user tasks, load RAM disk images.
184 */
185 size_t i;
186 program_t programs[CONFIG_INIT_TASKS] = { };
187
188 // FIXME: do not propagate arguments through sysinfo
189 // but pass them directly to the tasks
190 for (i = 0; i < init.cnt; i++) {
191 const char *arguments = init.tasks[i].arguments;
192 if (str_length(arguments) == 0)
193 continue;
194 if (str_length(init.tasks[i].name) == 0)
195 continue;
196 size_t arguments_size = str_size(arguments);
197
198 void *arguments_copy = malloc(arguments_size);
199 if (arguments_copy == NULL)
200 continue;
201 memcpy(arguments_copy, arguments, arguments_size);
202
203 char item_name[CONFIG_TASK_NAME_BUFLEN + 15];
204 snprintf(item_name, CONFIG_TASK_NAME_BUFLEN + 15,
205 "init_args.%s", init.tasks[i].name);
206
207 sysinfo_set_item_data(item_name, NULL, arguments_copy, arguments_size);
208 }
209
210 for (i = 0; i < init.cnt; i++) {
211 if (init.tasks[i].paddr % FRAME_SIZE) {
212 log(LF_OTHER, LVL_ERROR,
213 "init[%zu]: Address is not frame aligned", i);
214 programs[i].task = NULL;
215 continue;
216 }
217
218 /*
219 * Construct task name from the 'init:' prefix and the
220 * name stored in the init structure (if any).
221 */
222
223 char namebuf[TASK_NAME_BUFLEN];
224
225 const char *name = init.tasks[i].name;
226 if (name[0] == 0)
227 name = "<unknown>";
228
229 static_assert(TASK_NAME_BUFLEN >= INIT_PREFIX_LEN, "");
230 str_cpy(namebuf, TASK_NAME_BUFLEN, INIT_PREFIX);
231 str_cpy(namebuf + INIT_PREFIX_LEN,
232 TASK_NAME_BUFLEN - INIT_PREFIX_LEN, name);
233
234 /*
235 * Create virtual memory mappings for init task images.
236 */
237 uintptr_t page = km_map(init.tasks[i].paddr,
238 init.tasks[i].size, PAGE_SIZE,
239 PAGE_READ | PAGE_WRITE | PAGE_CACHEABLE);
240 assert(page);
241
242 if (str_cmp(name, "kernel.dbg") == 0) {
243 /*
244 * Not an actual init task, but rather debug sections extracted
245 * from the kernel ELF file and handed to us here so we can use
246 * it for debugging.
247 */
248
249 register_debug_data((void *) page, init.tasks[i].size);
250 programs[i].task = NULL;
251 continue;
252 }
253
254 if (str_cmp(name, "loader") == 0) {
255 /* Register image as the program loader */
256 if (program_loader == NULL) {
257 program_loader = (void *) page;
258 log(LF_OTHER, LVL_NOTE, "Program loader at %p",
259 program_loader);
260 } else {
261 log(LF_OTHER, LVL_ERROR,
262 "init[%zu]: Second binary named \"loader\""
263 " present.", i);
264 }
265
266 programs[i].task = NULL;
267 continue;
268 }
269
270 errno_t rc = program_create_from_image((void *) page, init.tasks[i].size, namebuf,
271 &programs[i]);
272
273 if (rc == 0) {
274 assert(programs[i].task != NULL);
275
276 /*
277 * Set permissions to init userspace tasks.
278 */
279 perm_set(programs[i].task,
280 PERM_PERM | PERM_MEM_MANAGER |
281 PERM_IO_MANAGER | PERM_IRQ_REG);
282
283 if (!ipc_box_0) {
284 ipc_box_0 = &programs[i].task->answerbox;
285 /*
286 * Hold the first task so that
287 * ipc_box_0 remains a valid pointer
288 * even if the first task exits for
289 * whatever reason.
290 */
291 task_hold(programs[i].task);
292 }
293
294 } else if (i == init.cnt - 1) {
295 /*
296 * Assume the last task is the RAM disk.
297 */
298 init_rd((void *) init.tasks[i].paddr, init.tasks[i].size);
299 } else {
300 log(LF_OTHER, LVL_ERROR,
301 "init[%zu]: Init binary load failed "
302 "(error %s, loader status %s)", i,
303 str_error_name(rc), str_error_name(programs[i].loader_status));
304 }
305 }
306
307 /*
308 * Run user tasks.
309 */
310 for (i = 0; i < init.cnt; i++) {
311 if (programs[i].task != NULL)
312 program_ready(&programs[i]);
313 }
314
315#ifdef CONFIG_KCONSOLE
316 if (!stdin) {
317 thread_sleep(10);
318 printf("kinit: No stdin\nKernel alive: .");
319
320 unsigned int i = 0;
321 while (true) {
322 printf("\b%c", alive[i % ALIVE_CHARS]);
323 thread_sleep(1);
324 i++;
325 }
326 }
327#endif /* CONFIG_KCONSOLE */
328}
329
330/** @}
331 */
Note: See TracBrowser for help on using the repository browser.