1 #ifndef QEMU_H 2 #define QEMU_H 3 4 #include <signal.h> 5 #include <string.h> 6 7 #include "cpu.h" 8 9 #undef DEBUG_REMAP 10 #ifdef DEBUG_REMAP 11 #include <stdlib.h> 12 #endif /* DEBUG_REMAP */ 13 14 #include "qemu-types.h" 15 16 #include "thunk.h" 17 #include "syscall_defs.h" 18 #include "syscall.h" 19 #include "target_signal.h" 20 #include "gdbstub.h" 21 #include "qemu-queue.h" 22 23 #if defined(CONFIG_USE_NPTL) 24 #define THREAD __thread 25 #else 26 #define THREAD 27 #endif 28 29 /* This struct is used to hold certain information about the image. 30 * Basically, it replicates in user space what would be certain 31 * task_struct fields in the kernel 32 */ 33 struct image_info { 34 abi_ulong load_bias; 35 abi_ulong load_addr; 36 abi_ulong start_code; 37 abi_ulong end_code; 38 abi_ulong start_data; 39 abi_ulong end_data; 40 abi_ulong start_brk; 41 abi_ulong brk; 42 abi_ulong start_mmap; 43 abi_ulong mmap; 44 abi_ulong rss; 45 abi_ulong start_stack; 46 abi_ulong stack_limit; 47 abi_ulong entry; 48 abi_ulong code_offset; 49 abi_ulong data_offset; 50 abi_ulong saved_auxv; 51 abi_ulong auxv_len; 52 abi_ulong arg_start; 53 abi_ulong arg_end; 54 int personality; 55 #ifdef CONFIG_USE_FDPIC 56 abi_ulong loadmap_addr; 57 uint16_t nsegs; 58 void *loadsegs; 59 abi_ulong pt_dynamic_addr; 60 struct image_info *other_info; 61 #endif 62 }; 63 64 #ifdef TARGET_I386 65 /* Information about the current linux thread */ 66 struct vm86_saved_state { 67 uint32_t eax; /* return code */ 68 uint32_t ebx; 69 uint32_t ecx; 70 uint32_t edx; 71 uint32_t esi; 72 uint32_t edi; 73 uint32_t ebp; 74 uint32_t esp; 75 uint32_t eflags; 76 uint32_t eip; 77 uint16_t cs, ss, ds, es, fs, gs; 78 }; 79 #endif 80 81 #ifdef TARGET_ARM 82 /* FPU emulator */ 83 #include "nwfpe/fpa11.h" 84 #endif 85 86 #define MAX_SIGQUEUE_SIZE 1024 87 88 struct sigqueue { 89 struct sigqueue *next; 90 target_siginfo_t info; 91 }; 92 93 struct emulated_sigtable { 94 int pending; /* true if signal is pending */ 95 struct sigqueue *first; 96 struct sigqueue info; /* in order to always have memory for the 97 first signal, we put it here */ 98 }; 99 100 /* NOTE: we force a big alignment so that the stack stored after is 101 aligned too */ 102 typedef struct TaskState { 103 pid_t ts_tid; /* tid (or pid) of this task */ 104 #ifdef TARGET_ARM 105 /* FPA state */ 106 FPA11 fpa; 107 int swi_errno; 108 #endif 109 #ifdef TARGET_UNICORE32 110 int swi_errno; 111 #endif 112 #if defined(TARGET_I386) && !defined(TARGET_X86_64) 113 abi_ulong target_v86; 114 struct vm86_saved_state vm86_saved_regs; 115 struct target_vm86plus_struct vm86plus; 116 uint32_t v86flags; 117 uint32_t v86mask; 118 #endif 119 #ifdef CONFIG_USE_NPTL 120 abi_ulong child_tidptr; 121 #endif 122 #ifdef TARGET_M68K 123 int sim_syscalls; 124 #endif 125 #if defined(TARGET_ARM) || defined(TARGET_M68K) || defined(TARGET_UNICORE32) 126 /* Extra fields for semihosted binaries. */ 127 uint32_t heap_base; 128 uint32_t heap_limit; 129 #endif 130 uint32_t stack_base; 131 int used; /* non zero if used */ 132 struct image_info *info; 133 struct linux_binprm *bprm; 134 135 struct emulated_sigtable sigtab[TARGET_NSIG]; 136 struct sigqueue sigqueue_table[MAX_SIGQUEUE_SIZE]; /* siginfo queue */ 137 struct sigqueue *first_free; /* first free siginfo queue entry */ 138 int signal_pending; /* non zero if a signal may be pending */ 139 } __attribute__((aligned(16))) TaskState; 140 141 extern char *exec_path; 142 void init_task_state(TaskState *ts); 143 void task_settid(TaskState *); 144 void stop_all_tasks(void); 145 extern const char *qemu_uname_release; 146 extern unsigned long mmap_min_addr; 147 148 /* ??? See if we can avoid exposing so much of the loader internals. */ 149 /* 150 * MAX_ARG_PAGES defines the number of pages allocated for arguments 151 * and envelope for the new program. 32 should suffice, this gives 152 * a maximum env+arg of 128kB w/4KB pages! 153 */ 154 #define MAX_ARG_PAGES 33 155 156 /* Read a good amount of data initially, to hopefully get all the 157 program headers loaded. */ 158 #define BPRM_BUF_SIZE 1024 159 160 /* 161 * This structure is used to hold the arguments that are 162 * used when loading binaries. 163 */ 164 struct linux_binprm { 165 char buf[BPRM_BUF_SIZE] __attribute__((aligned)); 166 void *page[MAX_ARG_PAGES]; 167 abi_ulong p; 168 int fd; 169 int e_uid, e_gid; 170 int argc, envc; 171 char **argv; 172 char **envp; 173 char * filename; /* Name of binary */ 174 int (*core_dump)(int, const CPUState *); /* coredump routine */ 175 }; 176 177 void do_init_thread(struct target_pt_regs *regs, struct image_info *infop); 178 abi_ulong loader_build_argptr(int envc, int argc, abi_ulong sp, 179 abi_ulong stringp, int push_ptr); 180 int loader_exec(const char * filename, char ** argv, char ** envp, 181 struct target_pt_regs * regs, struct image_info *infop, 182 struct linux_binprm *); 183 184 int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs, 185 struct image_info * info); 186 int load_flt_binary(struct linux_binprm * bprm, struct target_pt_regs * regs, 187 struct image_info * info); 188 189 abi_long memcpy_to_target(abi_ulong dest, const void *src, 190 unsigned long len); 191 void target_set_brk(abi_ulong new_brk); 192 abi_long do_brk(abi_ulong new_brk); 193 void syscall_init(void); 194 abi_long do_syscall(void *cpu_env, int num, abi_long arg1, 195 abi_long arg2, abi_long arg3, abi_long arg4, 196 abi_long arg5, abi_long arg6, abi_long arg7, 197 abi_long arg8); 198 void gemu_log(const char *fmt, ...) GCC_FMT_ATTR(1, 2); 199 extern THREAD CPUState *thread_env; 200 void cpu_loop(CPUState *env); 201 char *target_strerror(int err); 202 int get_osversion(void); 203 void fork_start(void); 204 void fork_end(int child); 205 206 /* Return true if the proposed guest_base is suitable for the guest. 207 * The guest code may leave a page mapped and populate it if the 208 * address is suitable. 209 */ 210 bool guest_validate_base(unsigned long guest_base); 211 212 #include "qemu-log.h" 213 214 /* strace.c */ 215 void print_syscall(int num, 216 abi_long arg1, abi_long arg2, abi_long arg3, 217 abi_long arg4, abi_long arg5, abi_long arg6); 218 void print_syscall_ret(int num, abi_long arg1); 219 extern int do_strace; 220 221 /* signal.c */ 222 void process_pending_signals(CPUState *cpu_env); 223 void signal_init(void); 224 int queue_signal(CPUState *env, int sig, target_siginfo_t *info); 225 void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info); 226 void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo); 227 int target_to_host_signal(int sig); 228 int host_to_target_signal(int sig); 229 long do_sigreturn(CPUState *env); 230 long do_rt_sigreturn(CPUState *env); 231 abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp); 232 233 #ifdef TARGET_I386 234 /* vm86.c */ 235 void save_v86_state(CPUX86State *env); 236 void handle_vm86_trap(CPUX86State *env, int trapno); 237 void handle_vm86_fault(CPUX86State *env); 238 int do_vm86(CPUX86State *env, long subfunction, abi_ulong v86_addr); 239 #elif defined(TARGET_SPARC64) 240 void sparc64_set_context(CPUSPARCState *env); 241 void sparc64_get_context(CPUSPARCState *env); 242 #endif 243 244 /* mmap.c */ 245 int target_mprotect(abi_ulong start, abi_ulong len, int prot); 246 abi_long target_mmap(abi_ulong start, abi_ulong len, int prot, 247 int flags, int fd, abi_ulong offset); 248 int target_munmap(abi_ulong start, abi_ulong len); 249 abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size, 250 abi_ulong new_size, unsigned long flags, 251 abi_ulong new_addr); 252 int target_msync(abi_ulong start, abi_ulong len, int flags); 253 extern unsigned long last_brk; 254 void mmap_lock(void); 255 void mmap_unlock(void); 256 abi_ulong mmap_find_vma(abi_ulong, abi_ulong); 257 void cpu_list_lock(void); 258 void cpu_list_unlock(void); 259 #if defined(CONFIG_USE_NPTL) 260 void mmap_fork_start(void); 261 void mmap_fork_end(int child); 262 #endif 263 264 /* main.c */ 265 extern unsigned long guest_stack_size; 266 267 /* user access */ 268 269 #define VERIFY_READ 0 270 #define VERIFY_WRITE 1 /* implies read access */ 271 272 static inline int access_ok(int type, abi_ulong addr, abi_ulong size) 273 { 274 return page_check_range((target_ulong)addr, size, 275 (type == VERIFY_READ) ? PAGE_READ : (PAGE_READ | PAGE_WRITE)) == 0; 276 } 277 278 /* NOTE __get_user and __put_user use host pointers and don't check access. */ 279 /* These are usually used to access struct data members once the 280 * struct has been locked - usually with lock_user_struct(). 281 */ 282 #define __put_user(x, hptr)\ 283 ({\ 284 switch(sizeof(*hptr)) {\ 285 case 1:\ 286 *(uint8_t *)(hptr) = (uint8_t)(typeof(*hptr))(x);\ 287 break;\ 288 case 2:\ 289 *(uint16_t *)(hptr) = tswap16((uint16_t)(typeof(*hptr))(x));\ 290 break;\ 291 case 4:\ 292 *(uint32_t *)(hptr) = tswap32((uint32_t)(typeof(*hptr))(x));\ 293 break;\ 294 case 8:\ 295 *(uint64_t *)(hptr) = tswap64((typeof(*hptr))(x));\ 296 break;\ 297 default:\ 298 abort();\ 299 }\ 300 0;\ 301 }) 302 303 #define __get_user(x, hptr) \ 304 ({\ 305 switch(sizeof(*hptr)) {\ 306 case 1:\ 307 x = (typeof(*hptr))*(uint8_t *)(hptr);\ 308 break;\ 309 case 2:\ 310 x = (typeof(*hptr))tswap16(*(uint16_t *)(hptr));\ 311 break;\ 312 case 4:\ 313 x = (typeof(*hptr))tswap32(*(uint32_t *)(hptr));\ 314 break;\ 315 case 8:\ 316 x = (typeof(*hptr))tswap64(*(uint64_t *)(hptr));\ 317 break;\ 318 default:\ 319 /* avoid warning */\ 320 x = 0;\ 321 abort();\ 322 }\ 323 0;\ 324 }) 325 326 /* put_user()/get_user() take a guest address and check access */ 327 /* These are usually used to access an atomic data type, such as an int, 328 * that has been passed by address. These internally perform locking 329 * and unlocking on the data type. 330 */ 331 #define put_user(x, gaddr, target_type) \ 332 ({ \ 333 abi_ulong __gaddr = (gaddr); \ 334 target_type *__hptr; \ 335 abi_long __ret; \ 336 if ((__hptr = lock_user(VERIFY_WRITE, __gaddr, sizeof(target_type), 0))) { \ 337 __ret = __put_user((x), __hptr); \ 338 unlock_user(__hptr, __gaddr, sizeof(target_type)); \ 339 } else \ 340 __ret = -TARGET_EFAULT; \ 341 __ret; \ 342 }) 343 344 #define get_user(x, gaddr, target_type) \ 345 ({ \ 346 abi_ulong __gaddr = (gaddr); \ 347 target_type *__hptr; \ 348 abi_long __ret; \ 349 if ((__hptr = lock_user(VERIFY_READ, __gaddr, sizeof(target_type), 1))) { \ 350 __ret = __get_user((x), __hptr); \ 351 unlock_user(__hptr, __gaddr, 0); \ 352 } else { \ 353 /* avoid warning */ \ 354 (x) = 0; \ 355 __ret = -TARGET_EFAULT; \ 356 } \ 357 __ret; \ 358 }) 359 360 #define put_user_ual(x, gaddr) put_user((x), (gaddr), abi_ulong) 361 #define put_user_sal(x, gaddr) put_user((x), (gaddr), abi_long) 362 #define put_user_u64(x, gaddr) put_user((x), (gaddr), uint64_t) 363 #define put_user_s64(x, gaddr) put_user((x), (gaddr), int64_t) 364 #define put_user_u32(x, gaddr) put_user((x), (gaddr), uint32_t) 365 #define put_user_s32(x, gaddr) put_user((x), (gaddr), int32_t) 366 #define put_user_u16(x, gaddr) put_user((x), (gaddr), uint16_t) 367 #define put_user_s16(x, gaddr) put_user((x), (gaddr), int16_t) 368 #define put_user_u8(x, gaddr) put_user((x), (gaddr), uint8_t) 369 #define put_user_s8(x, gaddr) put_user((x), (gaddr), int8_t) 370 371 #define get_user_ual(x, gaddr) get_user((x), (gaddr), abi_ulong) 372 #define get_user_sal(x, gaddr) get_user((x), (gaddr), abi_long) 373 #define get_user_u64(x, gaddr) get_user((x), (gaddr), uint64_t) 374 #define get_user_s64(x, gaddr) get_user((x), (gaddr), int64_t) 375 #define get_user_u32(x, gaddr) get_user((x), (gaddr), uint32_t) 376 #define get_user_s32(x, gaddr) get_user((x), (gaddr), int32_t) 377 #define get_user_u16(x, gaddr) get_user((x), (gaddr), uint16_t) 378 #define get_user_s16(x, gaddr) get_user((x), (gaddr), int16_t) 379 #define get_user_u8(x, gaddr) get_user((x), (gaddr), uint8_t) 380 #define get_user_s8(x, gaddr) get_user((x), (gaddr), int8_t) 381 382 /* copy_from_user() and copy_to_user() are usually used to copy data 383 * buffers between the target and host. These internally perform 384 * locking/unlocking of the memory. 385 */ 386 abi_long copy_from_user(void *hptr, abi_ulong gaddr, size_t len); 387 abi_long copy_to_user(abi_ulong gaddr, void *hptr, size_t len); 388 389 /* Functions for accessing guest memory. The tget and tput functions 390 read/write single values, byteswapping as necessary. The lock_user 391 gets a pointer to a contiguous area of guest memory, but does not perform 392 and byteswapping. lock_user may return either a pointer to the guest 393 memory, or a temporary buffer. */ 394 395 /* Lock an area of guest memory into the host. If copy is true then the 396 host area will have the same contents as the guest. */ 397 static inline void *lock_user(int type, abi_ulong guest_addr, long len, int copy) 398 { 399 if (!access_ok(type, guest_addr, len)) 400 return NULL; 401 #ifdef DEBUG_REMAP 402 { 403 void *addr; 404 addr = malloc(len); 405 if (copy) 406 memcpy(addr, g2h(guest_addr), len); 407 else 408 memset(addr, 0, len); 409 return addr; 410 } 411 #else 412 return g2h(guest_addr); 413 #endif 414 } 415 416 /* Unlock an area of guest memory. The first LEN bytes must be 417 flushed back to guest memory. host_ptr = NULL is explicitly 418 allowed and does nothing. */ 419 static inline void unlock_user(void *host_ptr, abi_ulong guest_addr, 420 long len) 421 { 422 423 #ifdef DEBUG_REMAP 424 if (!host_ptr) 425 return; 426 if (host_ptr == g2h(guest_addr)) 427 return; 428 if (len > 0) 429 memcpy(g2h(guest_addr), host_ptr, len); 430 free(host_ptr); 431 #endif 432 } 433 434 /* Return the length of a string in target memory or -TARGET_EFAULT if 435 access error. */ 436 abi_long target_strlen(abi_ulong gaddr); 437 438 /* Like lock_user but for null terminated strings. */ 439 static inline void *lock_user_string(abi_ulong guest_addr) 440 { 441 abi_long len; 442 len = target_strlen(guest_addr); 443 if (len < 0) 444 return NULL; 445 return lock_user(VERIFY_READ, guest_addr, (long)(len + 1), 1); 446 } 447 448 /* Helper macros for locking/ulocking a target struct. */ 449 #define lock_user_struct(type, host_ptr, guest_addr, copy) \ 450 (host_ptr = lock_user(type, guest_addr, sizeof(*host_ptr), copy)) 451 #define unlock_user_struct(host_ptr, guest_addr, copy) \ 452 unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0) 453 454 #if defined(CONFIG_USE_NPTL) 455 #include <pthread.h> 456 #endif 457 458 #endif /* QEMU_H */ 459