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 enum BSDType { 17 target_freebsd, 18 target_netbsd, 19 target_openbsd, 20 }; 21 22 #include "syscall_defs.h" 23 #include "syscall.h" 24 #include "target_signal.h" 25 #include "gdbstub.h" 26 27 #if defined(CONFIG_USE_NPTL) 28 #define THREAD __thread 29 #else 30 #define THREAD 31 #endif 32 33 /* This struct is used to hold certain information about the image. 34 * Basically, it replicates in user space what would be certain 35 * task_struct fields in the kernel 36 */ 37 struct image_info { 38 abi_ulong load_addr; 39 abi_ulong start_code; 40 abi_ulong end_code; 41 abi_ulong start_data; 42 abi_ulong end_data; 43 abi_ulong start_brk; 44 abi_ulong brk; 45 abi_ulong start_mmap; 46 abi_ulong mmap; 47 abi_ulong rss; 48 abi_ulong start_stack; 49 abi_ulong entry; 50 abi_ulong code_offset; 51 abi_ulong data_offset; 52 char **host_argv; 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); 134 abi_long do_netbsd_syscall(void *cpu_env, int num, abi_long arg1, 135 abi_long arg2, abi_long arg3, abi_long arg4, 136 abi_long arg5, abi_long arg6); 137 abi_long do_openbsd_syscall(void *cpu_env, int num, abi_long arg1, 138 abi_long arg2, abi_long arg3, abi_long arg4, 139 abi_long arg5, abi_long arg6); 140 void gemu_log(const char *fmt, ...) __attribute__((format(printf,1,2))); 141 extern THREAD CPUState *thread_env; 142 void cpu_loop(CPUState *env, enum BSDType bsd_type); 143 char *target_strerror(int err); 144 int get_osversion(void); 145 void fork_start(void); 146 void fork_end(int child); 147 148 #include "qemu-log.h" 149 150 /* strace.c */ 151 void 152 print_freebsd_syscall(int num, 153 abi_long arg1, abi_long arg2, abi_long arg3, 154 abi_long arg4, abi_long arg5, abi_long arg6); 155 void print_freebsd_syscall_ret(int num, abi_long ret); 156 void 157 print_netbsd_syscall(int num, 158 abi_long arg1, abi_long arg2, abi_long arg3, 159 abi_long arg4, abi_long arg5, abi_long arg6); 160 void print_netbsd_syscall_ret(int num, abi_long ret); 161 void 162 print_openbsd_syscall(int num, 163 abi_long arg1, abi_long arg2, abi_long arg3, 164 abi_long arg4, abi_long arg5, abi_long arg6); 165 void print_openbsd_syscall_ret(int num, abi_long ret); 166 extern int do_strace; 167 168 /* signal.c */ 169 void process_pending_signals(CPUState *cpu_env); 170 void signal_init(void); 171 //int queue_signal(CPUState *env, int sig, target_siginfo_t *info); 172 //void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info); 173 //void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo); 174 long do_sigreturn(CPUState *env); 175 long do_rt_sigreturn(CPUState *env); 176 abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp); 177 178 /* mmap.c */ 179 int target_mprotect(abi_ulong start, abi_ulong len, int prot); 180 abi_long target_mmap(abi_ulong start, abi_ulong len, int prot, 181 int flags, int fd, abi_ulong offset); 182 int target_munmap(abi_ulong start, abi_ulong len); 183 abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size, 184 abi_ulong new_size, unsigned long flags, 185 abi_ulong new_addr); 186 int target_msync(abi_ulong start, abi_ulong len, int flags); 187 extern unsigned long last_brk; 188 void mmap_lock(void); 189 void mmap_unlock(void); 190 void cpu_list_lock(void); 191 void cpu_list_unlock(void); 192 #if defined(CONFIG_USE_NPTL) 193 void mmap_fork_start(void); 194 void mmap_fork_end(int child); 195 #endif 196 197 /* main.c */ 198 extern unsigned long x86_stack_size; 199 200 /* user access */ 201 202 #define VERIFY_READ 0 203 #define VERIFY_WRITE 1 /* implies read access */ 204 205 static inline int access_ok(int type, abi_ulong addr, abi_ulong size) 206 { 207 return page_check_range((target_ulong)addr, size, 208 (type == VERIFY_READ) ? PAGE_READ : (PAGE_READ | PAGE_WRITE)) == 0; 209 } 210 211 /* NOTE __get_user and __put_user use host pointers and don't check access. */ 212 /* These are usually used to access struct data members once the 213 * struct has been locked - usually with lock_user_struct(). 214 */ 215 #define __put_user(x, hptr)\ 216 ({\ 217 int size = sizeof(*hptr);\ 218 switch(size) {\ 219 case 1:\ 220 *(uint8_t *)(hptr) = (uint8_t)(typeof(*hptr))(x);\ 221 break;\ 222 case 2:\ 223 *(uint16_t *)(hptr) = tswap16((typeof(*hptr))(x));\ 224 break;\ 225 case 4:\ 226 *(uint32_t *)(hptr) = tswap32((typeof(*hptr))(x));\ 227 break;\ 228 case 8:\ 229 *(uint64_t *)(hptr) = tswap64((typeof(*hptr))(x));\ 230 break;\ 231 default:\ 232 abort();\ 233 }\ 234 0;\ 235 }) 236 237 #define __get_user(x, hptr) \ 238 ({\ 239 int size = sizeof(*hptr);\ 240 switch(size) {\ 241 case 1:\ 242 x = (typeof(*hptr))*(uint8_t *)(hptr);\ 243 break;\ 244 case 2:\ 245 x = (typeof(*hptr))tswap16(*(uint16_t *)(hptr));\ 246 break;\ 247 case 4:\ 248 x = (typeof(*hptr))tswap32(*(uint32_t *)(hptr));\ 249 break;\ 250 case 8:\ 251 x = (typeof(*hptr))tswap64(*(uint64_t *)(hptr));\ 252 break;\ 253 default:\ 254 /* avoid warning */\ 255 x = 0;\ 256 abort();\ 257 }\ 258 0;\ 259 }) 260 261 /* put_user()/get_user() take a guest address and check access */ 262 /* These are usually used to access an atomic data type, such as an int, 263 * that has been passed by address. These internally perform locking 264 * and unlocking on the data type. 265 */ 266 #define put_user(x, gaddr, target_type) \ 267 ({ \ 268 abi_ulong __gaddr = (gaddr); \ 269 target_type *__hptr; \ 270 abi_long __ret; \ 271 if ((__hptr = lock_user(VERIFY_WRITE, __gaddr, sizeof(target_type), 0))) { \ 272 __ret = __put_user((x), __hptr); \ 273 unlock_user(__hptr, __gaddr, sizeof(target_type)); \ 274 } else \ 275 __ret = -TARGET_EFAULT; \ 276 __ret; \ 277 }) 278 279 #define get_user(x, gaddr, target_type) \ 280 ({ \ 281 abi_ulong __gaddr = (gaddr); \ 282 target_type *__hptr; \ 283 abi_long __ret; \ 284 if ((__hptr = lock_user(VERIFY_READ, __gaddr, sizeof(target_type), 1))) { \ 285 __ret = __get_user((x), __hptr); \ 286 unlock_user(__hptr, __gaddr, 0); \ 287 } else { \ 288 /* avoid warning */ \ 289 (x) = 0; \ 290 __ret = -TARGET_EFAULT; \ 291 } \ 292 __ret; \ 293 }) 294 295 #define put_user_ual(x, gaddr) put_user((x), (gaddr), abi_ulong) 296 #define put_user_sal(x, gaddr) put_user((x), (gaddr), abi_long) 297 #define put_user_u64(x, gaddr) put_user((x), (gaddr), uint64_t) 298 #define put_user_s64(x, gaddr) put_user((x), (gaddr), int64_t) 299 #define put_user_u32(x, gaddr) put_user((x), (gaddr), uint32_t) 300 #define put_user_s32(x, gaddr) put_user((x), (gaddr), int32_t) 301 #define put_user_u16(x, gaddr) put_user((x), (gaddr), uint16_t) 302 #define put_user_s16(x, gaddr) put_user((x), (gaddr), int16_t) 303 #define put_user_u8(x, gaddr) put_user((x), (gaddr), uint8_t) 304 #define put_user_s8(x, gaddr) put_user((x), (gaddr), int8_t) 305 306 #define get_user_ual(x, gaddr) get_user((x), (gaddr), abi_ulong) 307 #define get_user_sal(x, gaddr) get_user((x), (gaddr), abi_long) 308 #define get_user_u64(x, gaddr) get_user((x), (gaddr), uint64_t) 309 #define get_user_s64(x, gaddr) get_user((x), (gaddr), int64_t) 310 #define get_user_u32(x, gaddr) get_user((x), (gaddr), uint32_t) 311 #define get_user_s32(x, gaddr) get_user((x), (gaddr), int32_t) 312 #define get_user_u16(x, gaddr) get_user((x), (gaddr), uint16_t) 313 #define get_user_s16(x, gaddr) get_user((x), (gaddr), int16_t) 314 #define get_user_u8(x, gaddr) get_user((x), (gaddr), uint8_t) 315 #define get_user_s8(x, gaddr) get_user((x), (gaddr), int8_t) 316 317 /* copy_from_user() and copy_to_user() are usually used to copy data 318 * buffers between the target and host. These internally perform 319 * locking/unlocking of the memory. 320 */ 321 abi_long copy_from_user(void *hptr, abi_ulong gaddr, size_t len); 322 abi_long copy_to_user(abi_ulong gaddr, void *hptr, size_t len); 323 324 /* Functions for accessing guest memory. The tget and tput functions 325 read/write single values, byteswapping as neccessary. The lock_user 326 gets a pointer to a contiguous area of guest memory, but does not perform 327 and byteswapping. lock_user may return either a pointer to the guest 328 memory, or a temporary buffer. */ 329 330 /* Lock an area of guest memory into the host. If copy is true then the 331 host area will have the same contents as the guest. */ 332 static inline void *lock_user(int type, abi_ulong guest_addr, long len, int copy) 333 { 334 if (!access_ok(type, guest_addr, len)) 335 return NULL; 336 #ifdef DEBUG_REMAP 337 { 338 void *addr; 339 addr = malloc(len); 340 if (copy) 341 memcpy(addr, g2h(guest_addr), len); 342 else 343 memset(addr, 0, len); 344 return addr; 345 } 346 #else 347 return g2h(guest_addr); 348 #endif 349 } 350 351 /* Unlock an area of guest memory. The first LEN bytes must be 352 flushed back to guest memory. host_ptr = NULL is explicitly 353 allowed and does nothing. */ 354 static inline void unlock_user(void *host_ptr, abi_ulong guest_addr, 355 long len) 356 { 357 358 #ifdef DEBUG_REMAP 359 if (!host_ptr) 360 return; 361 if (host_ptr == g2h(guest_addr)) 362 return; 363 if (len > 0) 364 memcpy(g2h(guest_addr), host_ptr, len); 365 free(host_ptr); 366 #endif 367 } 368 369 /* Return the length of a string in target memory or -TARGET_EFAULT if 370 access error. */ 371 abi_long target_strlen(abi_ulong gaddr); 372 373 /* Like lock_user but for null terminated strings. */ 374 static inline void *lock_user_string(abi_ulong guest_addr) 375 { 376 abi_long len; 377 len = target_strlen(guest_addr); 378 if (len < 0) 379 return NULL; 380 return lock_user(VERIFY_READ, guest_addr, (long)(len + 1), 1); 381 } 382 383 /* Helper macros for locking/ulocking a target struct. */ 384 #define lock_user_struct(type, host_ptr, guest_addr, copy) \ 385 (host_ptr = lock_user(type, guest_addr, sizeof(*host_ptr), copy)) 386 #define unlock_user_struct(host_ptr, guest_addr, copy) \ 387 unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0) 388 389 #if defined(CONFIG_USE_NPTL) 390 #include <pthread.h> 391 #endif 392 393 #endif /* QEMU_H */ 394