Gennady Sharapov | ea2ba7d | 2006-01-08 01:01:31 -0800 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * Copyright (C) 2000, 2002 Jeff Dike (jdike@karaya.com) |
| 3 | * Licensed under the GPL |
| 4 | */ |
| 5 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | #include "linux/kernel.h" |
| 7 | #include "linux/sched.h" |
| 8 | #include "linux/notifier.h" |
| 9 | #include "linux/mm.h" |
| 10 | #include "linux/types.h" |
| 11 | #include "linux/tty.h" |
| 12 | #include "linux/init.h" |
| 13 | #include "linux/bootmem.h" |
| 14 | #include "linux/spinlock.h" |
| 15 | #include "linux/utsname.h" |
| 16 | #include "linux/sysrq.h" |
| 17 | #include "linux/seq_file.h" |
| 18 | #include "linux/delay.h" |
| 19 | #include "linux/module.h" |
| 20 | #include "asm/page.h" |
| 21 | #include "asm/pgtable.h" |
| 22 | #include "asm/ptrace.h" |
| 23 | #include "asm/elf.h" |
| 24 | #include "asm/user.h" |
Jeff Dike | 16c1116 | 2005-05-06 21:30:45 -0700 | [diff] [blame] | 25 | #include "asm/setup.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include "ubd_user.h" |
| 27 | #include "asm/current.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include "user_util.h" |
| 29 | #include "kern_util.h" |
| 30 | #include "kern.h" |
| 31 | #include "mem_user.h" |
| 32 | #include "mem.h" |
| 33 | #include "umid.h" |
| 34 | #include "initrd.h" |
| 35 | #include "init.h" |
| 36 | #include "os.h" |
| 37 | #include "choose-mode.h" |
| 38 | #include "mode_kern.h" |
| 39 | #include "mode.h" |
Paolo 'Blaisorblade' Giarrusso | cb66504 | 2005-07-27 11:43:31 -0700 | [diff] [blame] | 40 | #ifdef UML_CONFIG_MODE_SKAS |
| 41 | #include "skas.h" |
| 42 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | |
| 44 | #define DEFAULT_COMMAND_LINE "root=98:0" |
| 45 | |
| 46 | /* Changed in linux_main and setup_arch, which run before SMP is started */ |
Jeff Dike | 16c1116 | 2005-05-06 21:30:45 -0700 | [diff] [blame] | 47 | static char command_line[COMMAND_LINE_SIZE] = { 0 }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | |
Jeff Dike | 16c1116 | 2005-05-06 21:30:45 -0700 | [diff] [blame] | 49 | static void add_arg(char *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | { |
| 51 | if (strlen(command_line) + strlen(arg) + 1 > COMMAND_LINE_SIZE) { |
| 52 | printf("add_arg: Too many command line arguments!\n"); |
| 53 | exit(1); |
| 54 | } |
| 55 | if(strlen(command_line) > 0) |
| 56 | strcat(command_line, " "); |
| 57 | strcat(command_line, arg); |
| 58 | } |
| 59 | |
| 60 | struct cpuinfo_um boot_cpu_data = { |
| 61 | .loops_per_jiffy = 0, |
| 62 | .ipi_pipe = { -1, -1 } |
| 63 | }; |
| 64 | |
| 65 | unsigned long thread_saved_pc(struct task_struct *task) |
| 66 | { |
| 67 | return(os_process_pc(CHOOSE_MODE_PROC(thread_pid_tt, thread_pid_skas, |
| 68 | task))); |
| 69 | } |
| 70 | |
| 71 | static int show_cpuinfo(struct seq_file *m, void *v) |
| 72 | { |
| 73 | int index = 0; |
| 74 | |
| 75 | #ifdef CONFIG_SMP |
| 76 | index = (struct cpuinfo_um *) v - cpu_data; |
| 77 | if (!cpu_online(index)) |
| 78 | return 0; |
| 79 | #endif |
| 80 | |
| 81 | seq_printf(m, "processor\t: %d\n", index); |
| 82 | seq_printf(m, "vendor_id\t: User Mode Linux\n"); |
| 83 | seq_printf(m, "model name\t: UML\n"); |
| 84 | seq_printf(m, "mode\t\t: %s\n", CHOOSE_MODE("tt", "skas")); |
| 85 | seq_printf(m, "host\t\t: %s\n", host_info); |
| 86 | seq_printf(m, "bogomips\t: %lu.%02lu\n\n", |
| 87 | loops_per_jiffy/(500000/HZ), |
| 88 | (loops_per_jiffy/(5000/HZ)) % 100); |
| 89 | |
| 90 | return(0); |
| 91 | } |
| 92 | |
| 93 | static void *c_start(struct seq_file *m, loff_t *pos) |
| 94 | { |
| 95 | return *pos < NR_CPUS ? cpu_data + *pos : NULL; |
| 96 | } |
| 97 | |
| 98 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) |
| 99 | { |
| 100 | ++*pos; |
| 101 | return c_start(m, pos); |
| 102 | } |
| 103 | |
| 104 | static void c_stop(struct seq_file *m, void *v) |
| 105 | { |
| 106 | } |
| 107 | |
Jeff Dike | 5e7672e | 2006-09-27 01:50:33 -0700 | [diff] [blame] | 108 | const struct seq_operations cpuinfo_op = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | .start = c_start, |
| 110 | .next = c_next, |
| 111 | .stop = c_stop, |
| 112 | .show = show_cpuinfo, |
| 113 | }; |
| 114 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | /* Set in linux_main */ |
| 116 | unsigned long host_task_size; |
| 117 | unsigned long task_size; |
| 118 | |
| 119 | unsigned long uml_start; |
| 120 | |
| 121 | /* Set in early boot */ |
| 122 | unsigned long uml_physmem; |
| 123 | unsigned long uml_reserved; |
| 124 | unsigned long start_vm; |
| 125 | unsigned long end_vm; |
| 126 | int ncpus = 1; |
| 127 | |
Paolo 'Blaisorblade' Giarrusso | 0221575 | 2005-09-03 15:57:23 -0700 | [diff] [blame] | 128 | #ifdef CONFIG_CMDLINE_ON_HOST |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | /* Pointer set in linux_main, the array itself is private to each thread, |
| 130 | * and changed at address space creation time so this poses no concurrency |
| 131 | * problems. |
| 132 | */ |
| 133 | static char *argv1_begin = NULL; |
| 134 | static char *argv1_end = NULL; |
| 135 | #endif |
| 136 | |
| 137 | /* Set in early boot */ |
| 138 | static int have_root __initdata = 0; |
Jeff Dike | ae17381 | 2005-11-07 00:58:57 -0800 | [diff] [blame] | 139 | long long physmem_size = 32 * 1024 * 1024; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | |
| 141 | void set_cmdline(char *cmd) |
| 142 | { |
Paolo 'Blaisorblade' Giarrusso | 0221575 | 2005-09-03 15:57:23 -0700 | [diff] [blame] | 143 | #ifdef CONFIG_CMDLINE_ON_HOST |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | char *umid, *ptr; |
| 145 | |
| 146 | if(CHOOSE_MODE(honeypot, 0)) return; |
| 147 | |
Jeff Dike | 7eebe8a | 2006-01-06 00:19:01 -0800 | [diff] [blame] | 148 | umid = get_umid(); |
| 149 | if(*umid != '\0'){ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | snprintf(argv1_begin, |
| 151 | (argv1_end - argv1_begin) * sizeof(*ptr), |
| 152 | "(%s) ", umid); |
| 153 | ptr = &argv1_begin[strlen(argv1_begin)]; |
| 154 | } |
| 155 | else ptr = argv1_begin; |
| 156 | |
| 157 | snprintf(ptr, (argv1_end - ptr) * sizeof(*ptr), "[%s]", cmd); |
| 158 | memset(argv1_begin + strlen(argv1_begin), '\0', |
| 159 | argv1_end - argv1_begin - strlen(argv1_begin)); |
| 160 | #endif |
| 161 | } |
| 162 | |
| 163 | static char *usage_string = |
| 164 | "User Mode Linux v%s\n" |
| 165 | " available at http://user-mode-linux.sourceforge.net/\n\n"; |
| 166 | |
| 167 | static int __init uml_version_setup(char *line, int *add) |
| 168 | { |
Serge E. Hallyn | 96b644b | 2006-10-02 02:18:13 -0700 | [diff] [blame] | 169 | printf("%s\n", init_utsname()->release); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | exit(0); |
| 171 | |
| 172 | return 0; |
| 173 | } |
| 174 | |
| 175 | __uml_setup("--version", uml_version_setup, |
| 176 | "--version\n" |
| 177 | " Prints the version number of the kernel.\n\n" |
| 178 | ); |
| 179 | |
| 180 | static int __init uml_root_setup(char *line, int *add) |
| 181 | { |
| 182 | have_root = 1; |
| 183 | return 0; |
| 184 | } |
| 185 | |
| 186 | __uml_setup("root=", uml_root_setup, |
| 187 | "root=<file containing the root fs>\n" |
| 188 | " This is actually used by the generic kernel in exactly the same\n" |
| 189 | " way as in any other kernel. If you configure a number of block\n" |
| 190 | " devices and want to boot off something other than ubd0, you \n" |
| 191 | " would use something like:\n" |
| 192 | " root=/dev/ubd5\n\n" |
| 193 | ); |
| 194 | |
Jeff Dike | fbd5577 | 2006-02-07 12:58:40 -0800 | [diff] [blame] | 195 | #ifndef CONFIG_MODE_TT |
| 196 | |
| 197 | static int __init no_skas_debug_setup(char *line, int *add) |
| 198 | { |
| 199 | printf("'debug' is not necessary to gdb UML in skas mode - run \n"); |
| 200 | printf("'gdb linux' and disable CONFIG_CMDLINE_ON_HOST if gdb \n"); |
| 201 | printf("doesn't work as expected\n"); |
| 202 | |
| 203 | return 0; |
| 204 | } |
| 205 | |
| 206 | __uml_setup("debug", no_skas_debug_setup, |
| 207 | "debug\n" |
| 208 | " this flag is not needed to run gdb on UML in skas mode\n\n" |
| 209 | ); |
| 210 | |
| 211 | #endif |
| 212 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | #ifdef CONFIG_SMP |
| 214 | static int __init uml_ncpus_setup(char *line, int *add) |
| 215 | { |
| 216 | if (!sscanf(line, "%d", &ncpus)) { |
| 217 | printf("Couldn't parse [%s]\n", line); |
| 218 | return -1; |
| 219 | } |
| 220 | |
| 221 | return 0; |
| 222 | } |
| 223 | |
| 224 | __uml_setup("ncpus=", uml_ncpus_setup, |
| 225 | "ncpus=<# of desired CPUs>\n" |
| 226 | " This tells an SMP kernel how many virtual processors to start.\n\n" |
| 227 | ); |
| 228 | #endif |
| 229 | |
| 230 | static int force_tt = 0; |
| 231 | |
| 232 | #if defined(CONFIG_MODE_TT) && defined(CONFIG_MODE_SKAS) |
| 233 | #define DEFAULT_TT 0 |
| 234 | |
| 235 | static int __init mode_tt_setup(char *line, int *add) |
| 236 | { |
| 237 | force_tt = 1; |
| 238 | return(0); |
| 239 | } |
| 240 | |
| 241 | #else |
| 242 | #ifdef CONFIG_MODE_SKAS |
| 243 | |
| 244 | #define DEFAULT_TT 0 |
| 245 | |
| 246 | static int __init mode_tt_setup(char *line, int *add) |
| 247 | { |
| 248 | printf("CONFIG_MODE_TT disabled - 'mode=tt' ignored\n"); |
| 249 | return(0); |
| 250 | } |
| 251 | |
| 252 | #else |
| 253 | #ifdef CONFIG_MODE_TT |
| 254 | |
| 255 | #define DEFAULT_TT 1 |
| 256 | |
| 257 | static int __init mode_tt_setup(char *line, int *add) |
| 258 | { |
| 259 | printf("CONFIG_MODE_SKAS disabled - 'mode=tt' redundant\n"); |
| 260 | return(0); |
| 261 | } |
| 262 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | #endif |
| 264 | #endif |
| 265 | #endif |
| 266 | |
| 267 | __uml_setup("mode=tt", mode_tt_setup, |
| 268 | "mode=tt\n" |
| 269 | " When both CONFIG_MODE_TT and CONFIG_MODE_SKAS are enabled, this option\n" |
| 270 | " forces UML to run in tt (tracing thread) mode. It is not the default\n" |
| 271 | " because it's slower and less secure than skas mode.\n\n" |
| 272 | ); |
| 273 | |
| 274 | int mode_tt = DEFAULT_TT; |
| 275 | |
| 276 | static int __init Usage(char *line, int *add) |
| 277 | { |
| 278 | const char **p; |
| 279 | |
Serge E. Hallyn | 96b644b | 2006-10-02 02:18:13 -0700 | [diff] [blame] | 280 | printf(usage_string, init_utsname()->release); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | p = &__uml_help_start; |
| 282 | while (p < &__uml_help_end) { |
| 283 | printf("%s", *p); |
| 284 | p++; |
| 285 | } |
| 286 | exit(0); |
| 287 | |
| 288 | return 0; |
| 289 | } |
| 290 | |
| 291 | __uml_setup("--help", Usage, |
| 292 | "--help\n" |
| 293 | " Prints this message.\n\n" |
| 294 | ); |
| 295 | |
| 296 | static int __init uml_checksetup(char *line, int *add) |
| 297 | { |
| 298 | struct uml_param *p; |
| 299 | |
| 300 | p = &__uml_setup_start; |
| 301 | while(p < &__uml_setup_end) { |
| 302 | int n; |
| 303 | |
| 304 | n = strlen(p->str); |
| 305 | if(!strncmp(line, p->str, n)){ |
| 306 | if (p->setup_func(line + n, add)) return 1; |
| 307 | } |
| 308 | p++; |
| 309 | } |
| 310 | return 0; |
| 311 | } |
| 312 | |
| 313 | static void __init uml_postsetup(void) |
| 314 | { |
| 315 | initcall_t *p; |
| 316 | |
| 317 | p = &__uml_postsetup_start; |
| 318 | while(p < &__uml_postsetup_end){ |
| 319 | (*p)(); |
| 320 | p++; |
| 321 | } |
| 322 | return; |
| 323 | } |
| 324 | |
| 325 | /* Set during early boot */ |
| 326 | unsigned long brk_start; |
| 327 | unsigned long end_iomem; |
| 328 | EXPORT_SYMBOL(end_iomem); |
| 329 | |
| 330 | #define MIN_VMALLOC (32 * 1024 * 1024) |
| 331 | |
Jeff Dike | 23bbd58 | 2006-07-10 04:45:06 -0700 | [diff] [blame] | 332 | extern char __binary_start; |
| 333 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | int linux_main(int argc, char **argv) |
| 335 | { |
| 336 | unsigned long avail, diff; |
| 337 | unsigned long virtmem_size, max_physmem; |
| 338 | unsigned int i, add; |
Paolo 'Blaisorblade' Giarrusso | cb66504 | 2005-07-27 11:43:31 -0700 | [diff] [blame] | 339 | char * mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | |
| 341 | for (i = 1; i < argc; i++){ |
| 342 | if((i == 1) && (argv[i][0] == ' ')) continue; |
| 343 | add = 1; |
| 344 | uml_checksetup(argv[i], &add); |
| 345 | if (add) |
| 346 | add_arg(argv[i]); |
| 347 | } |
| 348 | if(have_root == 0) |
| 349 | add_arg(DEFAULT_COMMAND_LINE); |
| 350 | |
Gennady Sharapov | 60d339f6 | 2005-09-03 15:57:47 -0700 | [diff] [blame] | 351 | os_early_checks(); |
Paolo 'Blaisorblade' Giarrusso | 8923648 | 2005-09-30 11:59:00 -0700 | [diff] [blame] | 352 | if (force_tt) |
| 353 | clear_can_do_skas(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | mode_tt = force_tt ? 1 : !can_do_skas(); |
| 355 | #ifndef CONFIG_MODE_TT |
| 356 | if (mode_tt) { |
| 357 | /*Since CONFIG_MODE_TT is #undef'ed, force_tt cannot be 1. So, |
| 358 | * can_do_skas() returned 0, and the message is correct. */ |
| 359 | printf("Support for TT mode is disabled, and no SKAS support is present on the host.\n"); |
| 360 | exit(1); |
| 361 | } |
| 362 | #endif |
Paolo 'Blaisorblade' Giarrusso | cb66504 | 2005-07-27 11:43:31 -0700 | [diff] [blame] | 363 | |
| 364 | #ifndef CONFIG_MODE_SKAS |
| 365 | mode = "TT"; |
| 366 | #else |
| 367 | /* Show to the user the result of selection */ |
| 368 | if (mode_tt) |
| 369 | mode = "TT"; |
| 370 | else if (proc_mm && ptrace_faultinfo) |
| 371 | mode = "SKAS3"; |
| 372 | else |
| 373 | mode = "SKAS0"; |
| 374 | #endif |
| 375 | |
| 376 | printf("UML running in %s mode\n", mode); |
| 377 | |
Jeff Dike | 23bbd58 | 2006-07-10 04:45:06 -0700 | [diff] [blame] | 378 | uml_start = (unsigned long) &__binary_start; |
| 379 | host_task_size = CHOOSE_MODE_PROC(set_task_sizes_tt, |
| 380 | set_task_sizes_skas, &task_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | |
Gennady Sharapov | ea2ba7d | 2006-01-08 01:01:31 -0800 | [diff] [blame] | 382 | /* |
| 383 | * Setting up handlers to 'sig_info' struct |
| 384 | */ |
| 385 | os_fill_handlinfo(handlinfo_kern); |
| 386 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | brk_start = (unsigned long) sbrk(0); |
| 388 | CHOOSE_MODE_PROC(before_mem_tt, before_mem_skas, brk_start); |
| 389 | /* Increase physical memory size for exec-shield users |
| 390 | so they actually get what they asked for. This should |
| 391 | add zero for non-exec shield users */ |
| 392 | |
| 393 | diff = UML_ROUND_UP(brk_start) - UML_ROUND_UP(&_end); |
| 394 | if(diff > 1024 * 1024){ |
| 395 | printf("Adding %ld bytes to physical memory to account for " |
| 396 | "exec-shield gap\n", diff); |
| 397 | physmem_size += UML_ROUND_UP(brk_start) - UML_ROUND_UP(&_end); |
| 398 | } |
| 399 | |
Jeff Dike | 23bbd58 | 2006-07-10 04:45:06 -0700 | [diff] [blame] | 400 | uml_physmem = uml_start & PAGE_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | |
| 402 | /* Reserve up to 4M after the current brk */ |
| 403 | uml_reserved = ROUND_4M(brk_start) + (1 << 22); |
| 404 | |
Serge E. Hallyn | 96b644b | 2006-10-02 02:18:13 -0700 | [diff] [blame] | 405 | setup_machinename(init_utsname()->machine); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | |
Paolo 'Blaisorblade' Giarrusso | 0221575 | 2005-09-03 15:57:23 -0700 | [diff] [blame] | 407 | #ifdef CONFIG_CMDLINE_ON_HOST |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | argv1_begin = argv[1]; |
| 409 | argv1_end = &argv[1][strlen(argv[1])]; |
| 410 | #endif |
| 411 | |
| 412 | highmem = 0; |
| 413 | iomem_size = (iomem_size + PAGE_SIZE - 1) & PAGE_MASK; |
| 414 | max_physmem = get_kmem_end() - uml_physmem - iomem_size - MIN_VMALLOC; |
| 415 | |
| 416 | /* Zones have to begin on a 1 << MAX_ORDER page boundary, |
| 417 | * so this makes sure that's true for highmem |
| 418 | */ |
| 419 | max_physmem &= ~((1 << (PAGE_SHIFT + MAX_ORDER)) - 1); |
| 420 | if(physmem_size + iomem_size > max_physmem){ |
| 421 | highmem = physmem_size + iomem_size - max_physmem; |
| 422 | physmem_size -= highmem; |
| 423 | #ifndef CONFIG_HIGHMEM |
| 424 | highmem = 0; |
| 425 | printf("CONFIG_HIGHMEM not enabled - physical memory shrunk " |
Jeff Dike | d9f8b62 | 2006-03-27 01:14:29 -0800 | [diff] [blame] | 426 | "to %Lu bytes\n", physmem_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | #endif |
| 428 | } |
| 429 | |
| 430 | high_physmem = uml_physmem + physmem_size; |
| 431 | end_iomem = high_physmem + iomem_size; |
| 432 | high_memory = (void *) end_iomem; |
| 433 | |
| 434 | start_vm = VMALLOC_START; |
| 435 | |
| 436 | setup_physmem(uml_physmem, uml_reserved, physmem_size, highmem); |
| 437 | if(init_maps(physmem_size, iomem_size, highmem)){ |
Jeff Dike | d9f8b62 | 2006-03-27 01:14:29 -0800 | [diff] [blame] | 438 | printf("Failed to allocate mem_map for %Lu bytes of physical " |
| 439 | "memory and %Lu bytes of highmem\n", physmem_size, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | highmem); |
| 441 | exit(1); |
| 442 | } |
| 443 | |
| 444 | virtmem_size = physmem_size; |
| 445 | avail = get_kmem_end() - start_vm; |
| 446 | if(physmem_size > avail) virtmem_size = avail; |
| 447 | end_vm = start_vm + virtmem_size; |
| 448 | |
| 449 | if(virtmem_size < physmem_size) |
Jeff Dike | ae17381 | 2005-11-07 00:58:57 -0800 | [diff] [blame] | 450 | printf("Kernel virtual memory size shrunk to %lu bytes\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | virtmem_size); |
| 452 | |
| 453 | uml_postsetup(); |
| 454 | |
| 455 | task_protections((unsigned long) &init_thread_info); |
| 456 | os_flush_stdout(); |
| 457 | |
| 458 | return(CHOOSE_MODE(start_uml_tt(), start_uml_skas())); |
| 459 | } |
| 460 | |
| 461 | extern int uml_exitcode; |
| 462 | |
| 463 | static int panic_exit(struct notifier_block *self, unsigned long unused1, |
| 464 | void *unused2) |
| 465 | { |
| 466 | bust_spinlocks(1); |
| 467 | show_regs(&(current->thread.regs)); |
| 468 | bust_spinlocks(0); |
| 469 | uml_exitcode = 1; |
| 470 | machine_halt(); |
| 471 | return(0); |
| 472 | } |
| 473 | |
| 474 | static struct notifier_block panic_exit_notifier = { |
| 475 | .notifier_call = panic_exit, |
| 476 | .next = NULL, |
| 477 | .priority = 0 |
| 478 | }; |
| 479 | |
| 480 | void __init setup_arch(char **cmdline_p) |
| 481 | { |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 482 | atomic_notifier_chain_register(&panic_notifier_list, |
| 483 | &panic_exit_notifier); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | paging_init(); |
Jeff Dike | 16c1116 | 2005-05-06 21:30:45 -0700 | [diff] [blame] | 485 | strlcpy(saved_command_line, command_line, COMMAND_LINE_SIZE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | *cmdline_p = command_line; |
| 487 | setup_hostinfo(); |
| 488 | } |
| 489 | |
| 490 | void __init check_bugs(void) |
| 491 | { |
| 492 | arch_check_bugs(); |
Jeff Dike | 8e36706 | 2006-03-27 01:14:32 -0800 | [diff] [blame] | 493 | os_check_bugs(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | } |
| 495 | |
Gerd Hoffmann | 9a0b581 | 2006-03-23 02:59:32 -0800 | [diff] [blame] | 496 | void apply_alternatives(struct alt_instr *start, struct alt_instr *end) |
| 497 | { |
| 498 | } |
| 499 | |
Theodore Tso | c61a8416 | 2006-07-03 00:24:09 -0700 | [diff] [blame] | 500 | #ifdef CONFIG_SMP |
Gerd Hoffmann | 9a0b581 | 2006-03-23 02:59:32 -0800 | [diff] [blame] | 501 | void alternatives_smp_module_add(struct module *mod, char *name, |
| 502 | void *locks, void *locks_end, |
| 503 | void *text, void *text_end) |
| 504 | { |
| 505 | } |
| 506 | |
| 507 | void alternatives_smp_module_del(struct module *mod) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | { |
| 509 | } |
Theodore Tso | c61a8416 | 2006-07-03 00:24:09 -0700 | [diff] [blame] | 510 | #endif |