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001 /* Copyright (C) 2005 David Decotigny 001 /* Copyright (C) 2005 David Decotigny 002 Copyright (C) 2000-2004, The KOS team 002 Copyright (C) 2000-2004, The KOS team 003 003 004 This program is free software; you can redi 004 This program is free software; you can redistribute it and/or 005 modify it under the terms of the GNU Genera 005 modify it under the terms of the GNU General Public License 006 as published by the Free Software Foundatio 006 as published by the Free Software Foundation; either version 2 007 of the License, or (at your option) any lat 007 of the License, or (at your option) any later version. 008 008 009 This program is distributed in the hope tha 009 This program is distributed in the hope that it will be useful, 010 but WITHOUT ANY WARRANTY; without even the 010 but WITHOUT ANY WARRANTY; without even the implied warranty of 011 MERCHANTABILITY or FITNESS FOR A PARTICULAR 011 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 012 GNU General Public License for more details 012 GNU General Public License for more details. 013 013 014 You should have received a copy of the GNU 014 You should have received a copy of the GNU General Public License 015 along with this program; if not, write to t 015 along with this program; if not, write to the Free Software 016 Foundation, Inc., 59 Temple Place - Suite 3 016 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 017 USA. 017 USA. 018 */ 018 */ 019 #ifndef _SOS_CPUCTXT_H_ 019 #ifndef _SOS_CPUCTXT_H_ 020 #define _SOS_CPUCTXT_H_ 020 #define _SOS_CPUCTXT_H_ 021 021 022 022 023 /** 023 /** 024 * @file cpu_context.h 024 * @file cpu_context.h 025 * 025 * 026 * Low level API to manage kernel and user thr 026 * Low level API to manage kernel and user thread CPU contexts. Should 027 * be some kind of architecture-independent. 027 * be some kind of architecture-independent. 028 */ 028 */ 029 029 030 #include <sos/types.h> 030 #include <sos/types.h> 031 #include <sos/errno.h> 031 #include <sos/errno.h> 032 032 033 033 034 /** 034 /** >> 035 * Prepare the system to deal with multiple CPU execution contexts >> 036 */ >> 037 sos_ret_t sos_cpu_context_subsystem_setup(void); >> 038 >> 039 >> 040 /** 035 * Opaque structure storing the CPU context of 041 * Opaque structure storing the CPU context of an inactive kernel or 036 * user thread, as saved by the low level prim 042 * user thread, as saved by the low level primitives below or by the 037 * interrupt/exception handlers. 043 * interrupt/exception handlers. 038 * 044 * 039 * @note This is an (architecture-independent) 045 * @note This is an (architecture-independent) forward declaration: 040 * see cpu_context.c and the *.S files for its 046 * see cpu_context.c and the *.S files for its 041 * (architecture-dependent) definition. 047 * (architecture-dependent) definition. 042 */ 048 */ 043 struct sos_cpu_state; 049 struct sos_cpu_state; 044 050 045 051 046 /** 052 /** 047 * The type of the functions passed as argumen 053 * The type of the functions passed as arguments to the Kernel thread 048 * related functions. 054 * related functions. 049 */ 055 */ 050 typedef void (sos_cpu_kstate_function_arg1_t(s 056 typedef void (sos_cpu_kstate_function_arg1_t(sos_ui32_t arg1)); 051 057 052 058 053 /** 059 /** 054 * Function to create an initial context for a 060 * Function to create an initial context for a kernel thread starting 055 * its execution at function start_func with t 061 * its execution at function start_func with the argument initial_arg, 056 * and having the stack defined by stack_botto 062 * and having the stack defined by stack_bottom/stack_size. When the 057 * start_func function returns, the function e 063 * start_func function returns, the function exit_func is called with 058 * argument exit_arg. 064 * argument exit_arg. 059 * 065 * 060 * @param kctxt The kernel thread CPU context 066 * @param kctxt The kernel thread CPU context to initialize. The 061 * address of the newly-initialized struct sos 067 * address of the newly-initialized struct sos_cpu_state will be 062 * stored in this variable. The contents of th 068 * stored in this variable. The contents of this struct sos_cpu_state 063 * are actually located /inside/ the stack. 069 * are actually located /inside/ the stack. 064 * 070 * 065 * @param start_func The address of the first 071 * @param start_func The address of the first instruction that will be 066 * executed when this context will be first tr 072 * executed when this context will be first transferred on 067 * CPU. Practically speaking, this is the addr 073 * CPU. Practically speaking, this is the address of a function that 068 * is assumed to take 1 argument. 074 * is assumed to take 1 argument. 069 * 075 * 070 * @param start_arg The value that will be pas 076 * @param start_arg The value that will be passed as the argument to 071 * start_func when the thread starts. The stac 077 * start_func when the thread starts. The stack will be setup 072 * accordingly to simulate a real call to the 078 * accordingly to simulate a real call to the function and really 073 * passing this arguement. 079 * passing this arguement. 074 * 080 * 075 * @param stack_bottom The lowest address of t 081 * @param stack_bottom The lowest address of the stack. 076 * 082 * 077 * @param stack_size The size of the stack. 083 * @param stack_size The size of the stack. 078 * 084 * 079 * @param exit_func The address of the instruc 085 * @param exit_func The address of the instruction executed after the 080 * function start_func has returned. This func 086 * function start_func has returned. This function takes 1 parameter 081 * as argument: exit_arg. 087 * as argument: exit_arg. 082 * 088 * 083 * @param exit_arg The argument passed to the 089 * @param exit_arg The argument passed to the function exit_func. 084 * 090 * 085 * @note the newly created context is INTERRUP 091 * @note the newly created context is INTERRUPTIBLE by default ! 086 */ 092 */ 087 sos_ret_t sos_cpu_kstate_init(struct sos_cpu_s 093 sos_ret_t sos_cpu_kstate_init(struct sos_cpu_state **kctxt, 088 sos_cpu_kstate_f 094 sos_cpu_kstate_function_arg1_t *start_func, 089 sos_ui32_t star 095 sos_ui32_t start_arg, 090 sos_vaddr_t stac 096 sos_vaddr_t stack_bottom, 091 sos_size_t stac 097 sos_size_t stack_size, 092 sos_cpu_kstate_f 098 sos_cpu_kstate_function_arg1_t *exit_func, 093 sos_ui32_t exit 099 sos_ui32_t exit_arg); 094 100 095 101 096 /** 102 /** >> 103 * Function to create an initial context for a user thread starting >> 104 * its execution at function user_start_PC with the user_start_arg >> 105 * argument. The address of the user stack before any modification by >> 106 * the ustate_init() function is given by user_start_SP. The user >> 107 * thread starts in user space first and needs a kernel stack for >> 108 * the syscalls and for handling interrupts: the address of this >> 109 * kernel stack is given by the kernel_stack_* parameters. >> 110 * >> 111 * @param uctxt The user thread CPU context to initialize. The >> 112 * address of the newly-initialized struct sos_cpu_state will be >> 113 * stored in this variable. The contents of this struct sos_cpu_state >> 114 * are actually located /inside/ the kernel stack of the thread. >> 115 * >> 116 * @param user_start_PC The address of the first instruction that will >> 117 * be executed in user mode when this context will be first >> 118 * transferred on CPU. Practically speaking, this is the address of a >> 119 * function that is assumed to take 1 argument. >> 120 * >> 121 * @param user_start_SP The initial user stack address. >> 122 * >> 123 * @param user_start_argX The 2 parameters passed to the initial user >> 124 * thread function (in registers). >> 125 * >> 126 * @param kernel_stack_bottom The lowest address of the kernel stack >> 127 * used to switch to user mode and to handle interrupts/exceptions. >> 128 * >> 129 * @param kernel_stack_size The size of the kernel stack (@see >> 130 * kernel_stack_bottom). >> 131 * >> 132 * @note the newly thread context is INTERRUPTIBLE ! >> 133 */ >> 134 sos_ret_t sos_cpu_ustate_init(struct sos_cpu_state **uctxt, >> 135 sos_uaddr_t user_start_PC, >> 136 sos_ui32_t user_start_arg1, >> 137 sos_ui32_t user_start_arg2, >> 138 sos_uaddr_t user_initial_SP, >> 139 sos_vaddr_t kernel_stack_bottom, >> 140 sos_size_t kernel_stack_size); >> 141 >> 142 >> 143 /** >> 144 * Function to create an initial context for a user thread, copy of an >> 145 * existing user thread context. The user thread needs a kernel stack >> 146 * for the syscalls and for handling interrupts: the address of this >> 147 * kernel stack is given by the kernel_stack_* parameters. >> 148 * >> 149 * @param uctxt The user thread CPU context to initialize. The >> 150 * address of the newly-initialized struct sos_cpu_state will be >> 151 * stored in this variable. The contents of this struct sos_cpu_state >> 152 * are actually located /inside/ the kernel stack of the thread. >> 153 * >> 154 * @param model_uctxt The user thread context that will be copied to >> 155 * the new user thread context >> 156 * >> 157 * @param user_retval The parameter passed to the initial user >> 158 * thread function. >> 159 * >> 160 * @param kernel_stack_bottom The lowest address of the kernel stack >> 161 * used to switch to user mode and to handle interrupts/exceptions. >> 162 * >> 163 * @param kernel_stack_size The size of the kernel stack (@see >> 164 * kernel_stack_bottom). >> 165 * >> 166 * @note the newly thread context is INTERRUPTIBLE ! >> 167 */ >> 168 sos_ret_t sos_cpu_ustate_duplicate(struct sos_cpu_state **uctxt, >> 169 const struct sos_cpu_state *model_uctxt, >> 170 sos_ui32_t user_retval, >> 171 sos_vaddr_t kernel_stack_bottom, >> 172 sos_size_t kernel_stack_size); >> 173 >> 174 >> 175 /** 097 * Function that performs an immediate context 176 * Function that performs an immediate context-switch from one 098 * kernel/user thread to another one. It store 177 * kernel/user thread to another one. It stores the current executing 099 * context in from_ctxt, and restores to_conte 178 * context in from_ctxt, and restores to_context on CPU. 100 * 179 * 101 * @param from_ctxt The address of the struct 180 * @param from_ctxt The address of the struct sos_cpu_state will be 102 * stored in this variable. Must NOT be NULL. 181 * stored in this variable. Must NOT be NULL. 103 * 182 * 104 * @param to_ctxt The CPU will resume its exec 183 * @param to_ctxt The CPU will resume its execution with the struct 105 * sos_cpu_state located at this address. Must 184 * sos_cpu_state located at this address. Must NOT be NULL. 106 */ 185 */ 107 void sos_cpu_context_switch(struct sos_cpu_sta 186 void sos_cpu_context_switch(struct sos_cpu_state **from_ctxt, 108 struct sos_cpu_sta 187 struct sos_cpu_state *to_ctxt); 109 188 110 189 111 /* 190 /* 112 * Switch to the new given context (of a kerne 191 * Switch to the new given context (of a kernel/user thread) without 113 * saving the old context (of another kernel/u 192 * saving the old context (of another kernel/user thread), and call 114 * the function reclaiming_func passing it the 193 * the function reclaiming_func passing it the recalining_arg 115 * argument. The reclaining function is called 194 * argument. The reclaining function is called from within the stack 116 * of the new context, so that it can (among o 195 * of the new context, so that it can (among other things) safely 117 * destroy the stack of the former context. 196 * destroy the stack of the former context. 118 * 197 * 119 * @param switch_to_ctxt The context that will 198 * @param switch_to_ctxt The context that will be restored on the CPU 120 * 199 * 121 * @param reclaiming_func The address of the f 200 * @param reclaiming_func The address of the function that will be 122 * called after having changed the stack, but 201 * called after having changed the stack, but before restoring the CPU 123 * context to switch_to_ctxt. 202 * context to switch_to_ctxt. 124 */ 203 */ 125 void 204 void 126 sos_cpu_context_exit_to(struct sos_cpu_state * 205 sos_cpu_context_exit_to(struct sos_cpu_state *switch_to_ctxt, 127 sos_cpu_kstate_functio 206 sos_cpu_kstate_function_arg1_t *reclaiming_func, 128 sos_ui32_t reclaiming_ 207 sos_ui32_t reclaiming_arg) __attribute__((noreturn)); 129 208 130 /* =========================================== 209 /* ======================================================================= 131 * Public Accessor functions 210 * Public Accessor functions 132 */ 211 */ 133 212 134 213 135 /** 214 /** >> 215 * Return whether the saved context was in kernel or user context >> 216 * >> 217 * @return TRUE when context was interrupted when in user mode, FALSE >> 218 * when in kernel mode, < 0 on error. >> 219 */ >> 220 sos_ret_t >> 221 sos_cpu_context_is_in_user_mode(const struct sos_cpu_state *ctxt); >> 222 >> 223 >> 224 /** 136 * Return Program Counter stored in the saved 225 * Return Program Counter stored in the saved kernel/user context 137 */ 226 */ 138 sos_vaddr_t sos_cpu_context_get_PC(const struc 227 sos_vaddr_t sos_cpu_context_get_PC(const struct sos_cpu_state *ctxt); 139 228 140 229 141 /** 230 /** 142 * Return Stack Pointer stored in the saved ke 231 * Return Stack Pointer stored in the saved kernel/user context 143 */ 232 */ 144 sos_vaddr_t sos_cpu_context_get_SP(const struc 233 sos_vaddr_t sos_cpu_context_get_SP(const struct sos_cpu_state *ctxt); 145 234 146 235 147 /** 236 /** 148 * Dump the contents of the CPU context (bochs 237 * Dump the contents of the CPU context (bochs + x86_videomem) 149 */ 238 */ 150 void sos_cpu_context_dump(const struct sos_cpu 239 void sos_cpu_context_dump(const struct sos_cpu_state *ctxt); 151 240 152 241 153 /* =========================================== 242 /* ======================================================================= 154 * Public Accessor functions TO BE USED ONLY B 243 * Public Accessor functions TO BE USED ONLY BY Exception handlers 155 */ 244 */ 156 245 157 246 158 /** 247 /** 159 * Return the argument passed by the CPU upon 248 * Return the argument passed by the CPU upon exception, as stored in the 160 * saved context 249 * saved context 161 */ 250 */ 162 sos_ui32_t sos_cpu_context_get_EX_info(const s 251 sos_ui32_t sos_cpu_context_get_EX_info(const struct sos_cpu_state *ctxt); 163 252 164 253 165 /** 254 /** 166 * Return the faulting address of the exceptio 255 * Return the faulting address of the exception 167 */ 256 */ 168 sos_vaddr_t 257 sos_vaddr_t 169 sos_cpu_context_get_EX_faulting_vaddr(const st 258 sos_cpu_context_get_EX_faulting_vaddr(const struct sos_cpu_state *ctxt); >> 259 >> 260 >> 261 /** >> 262 * Change the return address of the given context >> 263 */ >> 264 sos_ret_t >> 265 sos_cpu_context_set_EX_return_address(struct sos_cpu_state *ctxt, >> 266 sos_vaddr_t ret_vaddr); >> 267 >> 268 >> 269 /* ======================================================================= >> 270 * Public Accessor functions TO BE USED ONLY BY the SYSCALL handler >> 271 */ >> 272 >> 273 /** >> 274 * Low-level functions used by the syscall handler. They are >> 275 * responsible for retrieving the arguments passed to the syscall when >> 276 * a user thread makes a syscall. Some of these arguments are >> 277 * available as registers' values in the user context, some of them >> 278 * are user-space addresses given by these registers. >> 279 * >> 280 * @return SOS_OK on success, <0 otherwise >> 281 */ >> 282 sos_ret_t sos_syscall_get1arg(const struct sos_cpu_state *user_ctxt, >> 283 /* out */unsigned int *arg1); >> 284 >> 285 sos_ret_t sos_syscall_get2args(const struct sos_cpu_state *user_ctxt, >> 286 /* out */unsigned int *arg1, >> 287 /* out */unsigned int *arg2); >> 288 >> 289 sos_ret_t sos_syscall_get3args(const struct sos_cpu_state *user_ctxt, >> 290 /* out */unsigned int *arg1, >> 291 /* out */unsigned int *arg2, >> 292 /* out */unsigned int *arg3); >> 293 >> 294 sos_ret_t sos_syscall_get4args(const struct sos_cpu_state *user_ctxt, >> 295 /* out */unsigned int *arg1, >> 296 /* out */unsigned int *arg2, >> 297 /* out */unsigned int *arg3, >> 298 /* out */unsigned int *arg4); >> 299 >> 300 sos_ret_t sos_syscall_get5args(const struct sos_cpu_state *user_ctxt, >> 301 /* out */unsigned int *arg1, >> 302 /* out */unsigned int *arg2, >> 303 /* out */unsigned int *arg3, >> 304 /* out */unsigned int *arg4, >> 305 /* out */unsigned int *arg5); >> 306 >> 307 sos_ret_t sos_syscall_get6args(const struct sos_cpu_state *user_ctxt, >> 308 /* out */unsigned int *arg1, >> 309 /* out */unsigned int *arg2, >> 310 /* out */unsigned int *arg3, >> 311 /* out */unsigned int *arg4, >> 312 /* out */unsigned int *arg5, >> 313 /* out */unsigned int *arg6); >> 314 >> 315 sos_ret_t sos_syscall_get7args(const struct sos_cpu_state *user_ctxt, >> 316 /* out */unsigned int *arg1, >> 317 /* out */unsigned int *arg2, >> 318 /* out */unsigned int *arg3, >> 319 /* out */unsigned int *arg4, >> 320 /* out */unsigned int *arg5, >> 321 /* out */unsigned int *arg6, >> 322 /* out */unsigned int *arg7); >> 323 >> 324 sos_ret_t sos_syscall_get8args(const struct sos_cpu_state *user_ctxt, >> 325 /* out */unsigned int *arg1, >> 326 /* out */unsigned int *arg2, >> 327 /* out */unsigned int *arg3, >> 328 /* out */unsigned int *arg4, >> 329 /* out */unsigned int *arg5, >> 330 /* out */unsigned int *arg6, >> 331 /* out */unsigned int *arg7, >> 332 /* out */unsigned int *arg8); 170 333 171 334 172 /* =========================================== 335 /* ======================================================================= 173 * Macros controlling stack poisoning. 336 * Macros controlling stack poisoning. 174 * Stack poisoning can be used to detect: 337 * Stack poisoning can be used to detect: 175 * - unitialized local variables 338 * - unitialized local variables 176 * - when the thread might have gone too deep 339 * - when the thread might have gone too deep in the stack 177 */ 340 */ 178 /** The signature of the poison */ 341 /** The signature of the poison */ 179 #define SOS_CPU_STATE_STACK_POISON 0xa5 342 #define SOS_CPU_STATE_STACK_POISON 0xa5 180 343 181 /** 344 /** 182 * When set, mean that the whole stack is pois 345 * When set, mean that the whole stack is poisoned to detect use of 183 * unititialized variables 346 * unititialized variables 184 */ 347 */ 185 #define SOS_CPU_STATE_DETECT_UNINIT_KERNEL_VAR 348 #define SOS_CPU_STATE_DETECT_UNINIT_KERNEL_VARS 186 /* #undef SOS_CPU_STATE_DETECT_UNINIT_KERNEL_V 349 /* #undef SOS_CPU_STATE_DETECT_UNINIT_KERNEL_VARS */ 187 350 188 /** 351 /** 189 * When set, mean that the bottom of the stack 352 * When set, mean that the bottom of the stack is poisoned to detect 190 * probable stack overflow. Its value indicate 353 * probable stack overflow. Its value indicates the number of bytes 191 * used for this detection. 354 * used for this detection. 192 */ 355 */ 193 #define SOS_CPU_STATE_DETECT_KERNEL_STACK_OVER 356 #define SOS_CPU_STATE_DETECT_KERNEL_STACK_OVERFLOW 64 194 /* #undef SOS_CPU_STATE_DETECT_KERNEL_STACK_OV 357 /* #undef SOS_CPU_STATE_DETECT_KERNEL_STACK_OVERFLOW */ 195 358 196 #if defined(SOS_CPU_STATE_DETECT_KERNEL_STACK_ 359 #if defined(SOS_CPU_STATE_DETECT_KERNEL_STACK_OVERFLOW) 197 void 360 void 198 sos_cpu_state_prepare_detect_kernel_stack_over 361 sos_cpu_state_prepare_detect_kernel_stack_overflow(const struct sos_cpu_state *ctxt, 199 362 sos_vaddr_t kernel_stack_bottom, 200 363 sos_size_t kernel_stack_size); 201 void sos_cpu_state_detect_kernel_stack_overflo 364 void sos_cpu_state_detect_kernel_stack_overflow(const struct sos_cpu_state *ctxt, 202 365 sos_vaddr_t kernel_stack_bottom, 203 366 sos_size_t kernel_stack_size); 204 #else 367 #else 205 # define sos_cpu_state_prepare_detect_kernel_s 368 # define sos_cpu_state_prepare_detect_kernel_stack_overflow(ctxt,stkbottom,stksize) \ 206 ({ /* nop */ }) 369 ({ /* nop */ }) 207 # define sos_cpu_state_detect_kernel_stack_ove 370 # define sos_cpu_state_detect_kernel_stack_overflow(ctxt,stkbottom,stksize) \ 208 ({ /* nop */ }) 371 ({ /* nop */ }) 209 #endif 372 #endif 210 373 211 374 212 /* =========================================== 375 /* ======================================================================= 213 * Backtrace facility. To be used for DEBUGgin 376 * Backtrace facility. To be used for DEBUGging purpose ONLY. 214 */ 377 */ 215 378 216 379 217 /** 380 /** 218 * The function called at each step of the bac 381 * The function called at each step of the backtrace iterations 219 * 382 * 220 * @param PC The address of the next instructi 383 * @param PC The address of the next instruction of the function that 221 * will be executed 384 * will be executed 222 * 385 * 223 * @param params The address of the array of t 386 * @param params The address of the array of the parameteres that have 224 * been passed to the function considered 387 * been passed to the function considered 225 * 388 * 226 * @param depth The index of the iteration (ie 389 * @param depth The index of the iteration (ie the depth of the 227 * current frame into the stack) 390 * current frame into the stack) 228 * 391 * 229 * @param custom_arg Whatever you want: this i 392 * @param custom_arg Whatever you want: this is the argument passed as 230 * custom_arg to sos_backtrace() 393 * custom_arg to sos_backtrace() 231 */ 394 */ 232 typedef void (sos_backtrace_callback_t)(sos_va 395 typedef void (sos_backtrace_callback_t)(sos_vaddr_t PC, 233 sos_va 396 sos_vaddr_t params, 234 sos_ui 397 sos_ui32_t depth, 235 void * 398 void *custom_arg); 236 399 237 400 238 /** 401 /** 239 * Call the backtracer callback on each frame 402 * Call the backtracer callback on each frame stored in the cpu_state 240 * 403 * 241 * @param cpu_state The CPU context we want to 404 * @param cpu_state The CPU context we want to explore. MUST be the 242 * context of a thread in Kernel mode, or NULL 405 * context of a thread in Kernel mode, or NULL. When NULL: backtrace 243 * the current CPU context. 406 * the current CPU context. 244 * 407 * 245 * @param max_depth The maximum number of fram 408 * @param max_depth The maximum number of frames to explore 246 * 409 * 247 * @param stack_bottom The lower boundary of t 410 * @param stack_bottom The lower boundary of the stack. This is used 248 * to make sure that the frame addresses fit i 411 * to make sure that the frame addresses fit inside the stack 249 * boudaries (ie are potentially correct). 412 * boudaries (ie are potentially correct). 250 * 413 * 251 * @param stack_size The size of the stack. Sa 414 * @param stack_size The size of the stack. Same comment. 252 * 415 * 253 * @param backtracer The function to call to h 416 * @param backtracer The function to call to handle the frame for each 254 * iteration 417 * iteration 255 * 418 * 256 * @param custom_arg The arg passed as custom_ 419 * @param custom_arg The arg passed as custom_arg to the backtracer 257 * 420 * 258 * @return The number of frames explored. 421 * @return The number of frames explored. 259 * 422 * 260 * @note Might be inaccurate when gcc's -fomit 423 * @note Might be inaccurate when gcc's -fomit-frame-pointer has been 261 * used. 424 * used. 262 */ 425 */ 263 sos_ui32_t sos_backtrace(const struct sos_cpu_ 426 sos_ui32_t sos_backtrace(const struct sos_cpu_state *cpu_state, 264 sos_ui32_t max_depth, 427 sos_ui32_t max_depth, 265 sos_vaddr_t stack_bot 428 sos_vaddr_t stack_bottom, 266 sos_size_t stack_size 429 sos_size_t stack_size, 267 sos_backtrace_callbac 430 sos_backtrace_callback_t * backtracer, 268 void *custom_arg); 431 void *custom_arg); 269 432 270 #endif /* _SOS_CPUCTXT_H_ */ 433 #endif /* _SOS_CPUCTXT_H_ */
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