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