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 "exec/user/abitypes.h" 15 16 enum BSDType { 17 target_freebsd, 18 target_netbsd, 19 target_openbsd, 20 }; 21 extern enum BSDType bsd_type; 22 23 #include "syscall_defs.h" 24 #include "syscall.h" 25 #include "target_signal.h" 26 #include "exec/gdbstub.h" 27 28 #if defined(CONFIG_USE_NPTL) 29 #define THREAD __thread 30 #else 31 #define THREAD 32 #endif 33 34 /* This struct is used to hold certain information about the image. 35 * Basically, it replicates in user space what would be certain 36 * task_struct fields in the kernel 37 */ 38 struct image_info { 39 abi_ulong load_addr; 40 abi_ulong start_code; 41 abi_ulong end_code; 42 abi_ulong start_data; 43 abi_ulong end_data; 44 abi_ulong start_brk; 45 abi_ulong brk; 46 abi_ulong start_mmap; 47 abi_ulong mmap; 48 abi_ulong rss; 49 abi_ulong start_stack; 50 abi_ulong entry; 51 abi_ulong code_offset; 52 abi_ulong data_offset; 53 int personality; 54 }; 55 56 #define MAX_SIGQUEUE_SIZE 1024 57 58 struct sigqueue { 59 struct sigqueue *next; 60 //target_siginfo_t info; 61 }; 62 63 struct emulated_sigtable { 64 int pending; /* true if signal is pending */ 65 struct sigqueue *first; 66 struct sigqueue info; /* in order to always have memory for the 67 first signal, we put it here */ 68 }; 69 70 /* NOTE: we force a big alignment so that the stack stored after is 71 aligned too */ 72 typedef struct TaskState { 73 struct TaskState *next; 74 int used; /* non zero if used */ 75 struct image_info *info; 76 77 struct emulated_sigtable sigtab[TARGET_NSIG]; 78 struct sigqueue sigqueue_table[MAX_SIGQUEUE_SIZE]; /* siginfo queue */ 79 struct sigqueue *first_free; /* first free siginfo queue entry */ 80 int signal_pending; /* non zero if a signal may be pending */ 81 82 uint8_t stack[0]; 83 } __attribute__((aligned(16))) TaskState; 84 85 void init_task_state(TaskState *ts); 86 extern const char *qemu_uname_release; 87 #if defined(CONFIG_USE_GUEST_BASE) 88 extern unsigned long mmap_min_addr; 89 #endif 90 91 /* ??? See if we can avoid exposing so much of the loader internals. */ 92 /* 93 * MAX_ARG_PAGES defines the number of pages allocated for arguments 94 * and envelope for the new program. 32 should suffice, this gives 95 * a maximum env+arg of 128kB w/4KB pages! 96 */ 97 #define MAX_ARG_PAGES 32 98 99 /* 100 * This structure is used to hold the arguments that are 101 * used when loading binaries. 102 */ 103 struct linux_binprm { 104 char buf[128]; 105 void *page[MAX_ARG_PAGES]; 106 abi_ulong p; 107 int fd; 108 int e_uid, e_gid; 109 int argc, envc; 110 char **argv; 111 char **envp; 112 char * filename; /* Name of binary */ 113 }; 114 115 void do_init_thread(struct target_pt_regs *regs, struct image_info *infop); 116 abi_ulong loader_build_argptr(int envc, int argc, abi_ulong sp, 117 abi_ulong stringp, int push_ptr); 118 int loader_exec(const char * filename, char ** argv, char ** envp, 119 struct target_pt_regs * regs, struct image_info *infop); 120 121 int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs, 122 struct image_info * info); 123 int load_flt_binary(struct linux_binprm * bprm, struct target_pt_regs * regs, 124 struct image_info * info); 125 126 abi_long memcpy_to_target(abi_ulong dest, const void *src, 127 unsigned long len); 128 void target_set_brk(abi_ulong new_brk); 129 abi_long do_brk(abi_ulong new_brk); 130 void syscall_init(void); 131 abi_long do_freebsd_syscall(void *cpu_env, int num, abi_long arg1, 132 abi_long arg2, abi_long arg3, abi_long arg4, 133 abi_long arg5, abi_long arg6, abi_long arg7, 134 abi_long arg8); 135 abi_long do_netbsd_syscall(void *cpu_env, int num, abi_long arg1, 136 abi_long arg2, abi_long arg3, abi_long arg4, 137 abi_long arg5, abi_long arg6); 138 abi_long do_openbsd_syscall(void *cpu_env, int num, abi_long arg1, 139 abi_long arg2, abi_long arg3, abi_long arg4, 140 abi_long arg5, abi_long arg6); 141 void gemu_log(const char *fmt, ...) GCC_FMT_ATTR(1, 2); 142 extern THREAD CPUState *thread_cpu; 143 void cpu_loop(CPUArchState *env); 144 char *target_strerror(int err); 145 int get_osversion(void); 146 void fork_start(void); 147 void fork_end(int child); 148 149 #include "qemu/log.h" 150 151 /* strace.c */ 152 void 153 print_freebsd_syscall(int num, 154 abi_long arg1, abi_long arg2, abi_long arg3, 155 abi_long arg4, abi_long arg5, abi_long arg6); 156 void print_freebsd_syscall_ret(int num, abi_long ret); 157 void 158 print_netbsd_syscall(int num, 159 abi_long arg1, abi_long arg2, abi_long arg3, 160 abi_long arg4, abi_long arg5, abi_long arg6); 161 void print_netbsd_syscall_ret(int num, abi_long ret); 162 void 163 print_openbsd_syscall(int num, 164 abi_long arg1, abi_long arg2, abi_long arg3, 165 abi_long arg4, abi_long arg5, abi_long arg6); 166 void print_openbsd_syscall_ret(int num, abi_long ret); 167 extern int do_strace; 168 169 /* signal.c */ 170 void process_pending_signals(CPUArchState *cpu_env); 171 void signal_init(void); 172 //int queue_signal(CPUArchState *env, int sig, target_siginfo_t *info); 173 //void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info); 174 //void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo); 175 long do_sigreturn(CPUArchState *env); 176 long do_rt_sigreturn(CPUArchState *env); 177 abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp); 178 179 /* mmap.c */ 180 int target_mprotect(abi_ulong start, abi_ulong len, int prot); 181 abi_long target_mmap(abi_ulong start, abi_ulong len, int prot, 182 int flags, int fd, abi_ulong offset); 183 int target_munmap(abi_ulong start, abi_ulong len); 184 abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size, 185 abi_ulong new_size, unsigned long flags, 186 abi_ulong new_addr); 187 int target_msync(abi_ulong start, abi_ulong len, int flags); 188 extern unsigned long last_brk; 189 void mmap_lock(void); 190 void mmap_unlock(void); 191 void cpu_list_lock(void); 192 void cpu_list_unlock(void); 193 #if defined(CONFIG_USE_NPTL) 194 void mmap_fork_start(void); 195 void mmap_fork_end(int child); 196 #endif 197 198 /* main.c */ 199 extern unsigned long x86_stack_size; 200 201 /* user access */ 202 203 #define VERIFY_READ 0 204 #define VERIFY_WRITE 1 /* implies read access */ 205 206 static inline int access_ok(int type, abi_ulong addr, abi_ulong size) 207 { 208 return page_check_range((target_ulong)addr, size, 209 (type == VERIFY_READ) ? PAGE_READ : (PAGE_READ | PAGE_WRITE)) == 0; 210 } 211 212 /* NOTE __get_user and __put_user use host pointers and don't check access. */ 213 /* These are usually used to access struct data members once the 214 * struct has been locked - usually with lock_user_struct(). 215 */ 216 #define __put_user(x, hptr)\ 217 ({\ 218 int size = sizeof(*hptr);\ 219 switch(size) {\ 220 case 1:\ 221 *(uint8_t *)(hptr) = (uint8_t)(typeof(*hptr))(x);\ 222 break;\ 223 case 2:\ 224 *(uint16_t *)(hptr) = tswap16((typeof(*hptr))(x));\ 225 break;\ 226 case 4:\ 227 *(uint32_t *)(hptr) = tswap32((typeof(*hptr))(x));\ 228 break;\ 229 case 8:\ 230 *(uint64_t *)(hptr) = tswap64((typeof(*hptr))(x));\ 231 break;\ 232 default:\ 233 abort();\ 234 }\ 235 0;\ 236 }) 237 238 #define __get_user(x, hptr) \ 239 ({\ 240 int size = sizeof(*hptr);\ 241 switch(size) {\ 242 case 1:\ 243 x = (typeof(*hptr))*(uint8_t *)(hptr);\ 244 break;\ 245 case 2:\ 246 x = (typeof(*hptr))tswap16(*(uint16_t *)(hptr));\ 247 break;\ 248 case 4:\ 249 x = (typeof(*hptr))tswap32(*(uint32_t *)(hptr));\ 250 break;\ 251 case 8:\ 252 x = (typeof(*hptr))tswap64(*(uint64_t *)(hptr));\ 253 break;\ 254 default:\ 255 /* avoid warning */\ 256 x = 0;\ 257 abort();\ 258 }\ 259 0;\ 260 }) 261 262 /* put_user()/get_user() take a guest address and check access */ 263 /* These are usually used to access an atomic data type, such as an int, 264 * that has been passed by address. These internally perform locking 265 * and unlocking on the data type. 266 */ 267 #define put_user(x, gaddr, target_type) \ 268 ({ \ 269 abi_ulong __gaddr = (gaddr); \ 270 target_type *__hptr; \ 271 abi_long __ret; \ 272 if ((__hptr = lock_user(VERIFY_WRITE, __gaddr, sizeof(target_type), 0))) { \ 273 __ret = __put_user((x), __hptr); \ 274 unlock_user(__hptr, __gaddr, sizeof(target_type)); \ 275 } else \ 276 __ret = -TARGET_EFAULT; \ 277 __ret; \ 278 }) 279 280 #define get_user(x, gaddr, target_type) \ 281 ({ \ 282 abi_ulong __gaddr = (gaddr); \ 283 target_type *__hptr; \ 284 abi_long __ret; \ 285 if ((__hptr = lock_user(VERIFY_READ, __gaddr, sizeof(target_type), 1))) { \ 286 __ret = __get_user((x), __hptr); \ 287 unlock_user(__hptr, __gaddr, 0); \ 288 } else { \ 289 /* avoid warning */ \ 290 (x) = 0; \ 291 __ret = -TARGET_EFAULT; \ 292 } \ 293 __ret; \ 294 }) 295 296 #define put_user_ual(x, gaddr) put_user((x), (gaddr), abi_ulong) 297 #define put_user_sal(x, gaddr) put_user((x), (gaddr), abi_long) 298 #define put_user_u64(x, gaddr) put_user((x), (gaddr), uint64_t) 299 #define put_user_s64(x, gaddr) put_user((x), (gaddr), int64_t) 300 #define put_user_u32(x, gaddr) put_user((x), (gaddr), uint32_t) 301 #define put_user_s32(x, gaddr) put_user((x), (gaddr), int32_t) 302 #define put_user_u16(x, gaddr) put_user((x), (gaddr), uint16_t) 303 #define put_user_s16(x, gaddr) put_user((x), (gaddr), int16_t) 304 #define put_user_u8(x, gaddr) put_user((x), (gaddr), uint8_t) 305 #define put_user_s8(x, gaddr) put_user((x), (gaddr), int8_t) 306 307 #define get_user_ual(x, gaddr) get_user((x), (gaddr), abi_ulong) 308 #define get_user_sal(x, gaddr) get_user((x), (gaddr), abi_long) 309 #define get_user_u64(x, gaddr) get_user((x), (gaddr), uint64_t) 310 #define get_user_s64(x, gaddr) get_user((x), (gaddr), int64_t) 311 #define get_user_u32(x, gaddr) get_user((x), (gaddr), uint32_t) 312 #define get_user_s32(x, gaddr) get_user((x), (gaddr), int32_t) 313 #define get_user_u16(x, gaddr) get_user((x), (gaddr), uint16_t) 314 #define get_user_s16(x, gaddr) get_user((x), (gaddr), int16_t) 315 #define get_user_u8(x, gaddr) get_user((x), (gaddr), uint8_t) 316 #define get_user_s8(x, gaddr) get_user((x), (gaddr), int8_t) 317 318 /* copy_from_user() and copy_to_user() are usually used to copy data 319 * buffers between the target and host. These internally perform 320 * locking/unlocking of the memory. 321 */ 322 abi_long copy_from_user(void *hptr, abi_ulong gaddr, size_t len); 323 abi_long copy_to_user(abi_ulong gaddr, void *hptr, size_t len); 324 325 /* Functions for accessing guest memory. The tget and tput functions 326 read/write single values, byteswapping as necessary. The lock_user function 327 gets a pointer to a contiguous area of guest memory, but does not perform 328 any byteswapping. lock_user may return either a pointer to the guest 329 memory, or a temporary buffer. */ 330 331 /* Lock an area of guest memory into the host. If copy is true then the 332 host area will have the same contents as the guest. */ 333 static inline void *lock_user(int type, abi_ulong guest_addr, long len, int copy) 334 { 335 if (!access_ok(type, guest_addr, len)) 336 return NULL; 337 #ifdef DEBUG_REMAP 338 { 339 void *addr; 340 addr = malloc(len); 341 if (copy) 342 memcpy(addr, g2h(guest_addr), len); 343 else 344 memset(addr, 0, len); 345 return addr; 346 } 347 #else 348 return g2h(guest_addr); 349 #endif 350 } 351 352 /* Unlock an area of guest memory. The first LEN bytes must be 353 flushed back to guest memory. host_ptr = NULL is explicitly 354 allowed and does nothing. */ 355 static inline void unlock_user(void *host_ptr, abi_ulong guest_addr, 356 long len) 357 { 358 359 #ifdef DEBUG_REMAP 360 if (!host_ptr) 361 return; 362 if (host_ptr == g2h(guest_addr)) 363 return; 364 if (len > 0) 365 memcpy(g2h(guest_addr), host_ptr, len); 366 free(host_ptr); 367 #endif 368 } 369 370 /* Return the length of a string in target memory or -TARGET_EFAULT if 371 access error. */ 372 abi_long target_strlen(abi_ulong gaddr); 373 374 /* Like lock_user but for null terminated strings. */ 375 static inline void *lock_user_string(abi_ulong guest_addr) 376 { 377 abi_long len; 378 len = target_strlen(guest_addr); 379 if (len < 0) 380 return NULL; 381 return lock_user(VERIFY_READ, guest_addr, (long)(len + 1), 1); 382 } 383 384 /* Helper macros for locking/unlocking a target struct. */ 385 #define lock_user_struct(type, host_ptr, guest_addr, copy) \ 386 (host_ptr = lock_user(type, guest_addr, sizeof(*host_ptr), copy)) 387 #define unlock_user_struct(host_ptr, guest_addr, copy) \ 388 unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0) 389 390 #if defined(CONFIG_USE_NPTL) 391 #include <pthread.h> 392 #endif 393 394 #endif /* QEMU_H */ 395