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(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 88 /* ??? See if we can avoid exposing so much of the loader internals. */ 89 /* 90 * MAX_ARG_PAGES defines the number of pages allocated for arguments 91 * and envelope for the new program. 32 should suffice, this gives 92 * a maximum env+arg of 128kB w/4KB pages! 93 */ 94 #define MAX_ARG_PAGES 32 95 96 /* 97 * This structure is used to hold the arguments that are 98 * used when loading binaries. 99 */ 100 struct linux_binprm { 101 char buf[128]; 102 void *page[MAX_ARG_PAGES]; 103 abi_ulong p; 104 int fd; 105 int e_uid, e_gid; 106 int argc, envc; 107 char **argv; 108 char **envp; 109 char * filename; /* Name of binary */ 110 }; 111 112 void do_init_thread(struct target_pt_regs *regs, struct image_info *infop); 113 abi_ulong loader_build_argptr(int envc, int argc, abi_ulong sp, 114 abi_ulong stringp, int push_ptr); 115 int loader_exec(const char * filename, char ** argv, char ** envp, 116 struct target_pt_regs * regs, struct image_info *infop); 117 118 int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs, 119 struct image_info * info); 120 int load_flt_binary(struct linux_binprm * bprm, struct target_pt_regs * regs, 121 struct image_info * info); 122 123 abi_long memcpy_to_target(abi_ulong dest, const void *src, 124 unsigned long len); 125 void target_set_brk(abi_ulong new_brk); 126 abi_long do_brk(abi_ulong new_brk); 127 void syscall_init(void); 128 abi_long do_freebsd_syscall(void *cpu_env, int num, abi_long arg1, 129 abi_long arg2, abi_long arg3, abi_long arg4, 130 abi_long arg5, abi_long arg6); 131 abi_long do_netbsd_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_openbsd_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 void gemu_log(const char *fmt, ...) __attribute__((format(printf,1,2))); 138 extern THREAD CPUState *thread_env; 139 void cpu_loop(CPUState *env, enum BSDType bsd_type); 140 void init_paths(const char *prefix); 141 const char *path(const char *pathname); 142 char *target_strerror(int err); 143 int get_osversion(void); 144 void fork_start(void); 145 void fork_end(int child); 146 147 #include "qemu-log.h" 148 149 /* strace.c */ 150 void 151 print_freebsd_syscall(int num, 152 abi_long arg1, abi_long arg2, abi_long arg3, 153 abi_long arg4, abi_long arg5, abi_long arg6); 154 void print_freebsd_syscall_ret(int num, abi_long ret); 155 void 156 print_netbsd_syscall(int num, 157 abi_long arg1, abi_long arg2, abi_long arg3, 158 abi_long arg4, abi_long arg5, abi_long arg6); 159 void print_netbsd_syscall_ret(int num, abi_long ret); 160 void 161 print_openbsd_syscall(int num, 162 abi_long arg1, abi_long arg2, abi_long arg3, 163 abi_long arg4, abi_long arg5, abi_long arg6); 164 void print_openbsd_syscall_ret(int num, abi_long ret); 165 extern int do_strace; 166 167 /* signal.c */ 168 void process_pending_signals(CPUState *cpu_env); 169 void signal_init(void); 170 //int queue_signal(CPUState *env, int sig, target_siginfo_t *info); 171 //void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info); 172 //void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo); 173 long do_sigreturn(CPUState *env); 174 long do_rt_sigreturn(CPUState *env); 175 abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp); 176 177 /* mmap.c */ 178 int target_mprotect(abi_ulong start, abi_ulong len, int prot); 179 abi_long target_mmap(abi_ulong start, abi_ulong len, int prot, 180 int flags, int fd, abi_ulong offset); 181 int target_munmap(abi_ulong start, abi_ulong len); 182 abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size, 183 abi_ulong new_size, unsigned long flags, 184 abi_ulong new_addr); 185 int target_msync(abi_ulong start, abi_ulong len, int flags); 186 extern unsigned long last_brk; 187 void mmap_lock(void); 188 void mmap_unlock(void); 189 #if defined(USE_NPTL) 190 void mmap_fork_start(void); 191 void mmap_fork_end(int child); 192 #endif 193 194 /* user access */ 195 196 #define VERIFY_READ 0 197 #define VERIFY_WRITE 1 /* implies read access */ 198 199 static inline int access_ok(int type, abi_ulong addr, abi_ulong size) 200 { 201 return page_check_range((target_ulong)addr, size, 202 (type == VERIFY_READ) ? PAGE_READ : (PAGE_READ | PAGE_WRITE)) == 0; 203 } 204 205 /* NOTE __get_user and __put_user use host pointers and don't check access. */ 206 /* These are usually used to access struct data members once the 207 * struct has been locked - usually with lock_user_struct(). 208 */ 209 #define __put_user(x, hptr)\ 210 ({\ 211 int size = sizeof(*hptr);\ 212 switch(size) {\ 213 case 1:\ 214 *(uint8_t *)(hptr) = (uint8_t)(typeof(*hptr))(x);\ 215 break;\ 216 case 2:\ 217 *(uint16_t *)(hptr) = tswap16((typeof(*hptr))(x));\ 218 break;\ 219 case 4:\ 220 *(uint32_t *)(hptr) = tswap32((typeof(*hptr))(x));\ 221 break;\ 222 case 8:\ 223 *(uint64_t *)(hptr) = tswap64((typeof(*hptr))(x));\ 224 break;\ 225 default:\ 226 abort();\ 227 }\ 228 0;\ 229 }) 230 231 #define __get_user(x, hptr) \ 232 ({\ 233 int size = sizeof(*hptr);\ 234 switch(size) {\ 235 case 1:\ 236 x = (typeof(*hptr))*(uint8_t *)(hptr);\ 237 break;\ 238 case 2:\ 239 x = (typeof(*hptr))tswap16(*(uint16_t *)(hptr));\ 240 break;\ 241 case 4:\ 242 x = (typeof(*hptr))tswap32(*(uint32_t *)(hptr));\ 243 break;\ 244 case 8:\ 245 x = (typeof(*hptr))tswap64(*(uint64_t *)(hptr));\ 246 break;\ 247 default:\ 248 /* avoid warning */\ 249 x = 0;\ 250 abort();\ 251 }\ 252 0;\ 253 }) 254 255 /* put_user()/get_user() take a guest address and check access */ 256 /* These are usually used to access an atomic data type, such as an int, 257 * that has been passed by address. These internally perform locking 258 * and unlocking on the data type. 259 */ 260 #define put_user(x, gaddr, target_type) \ 261 ({ \ 262 abi_ulong __gaddr = (gaddr); \ 263 target_type *__hptr; \ 264 abi_long __ret; \ 265 if ((__hptr = lock_user(VERIFY_WRITE, __gaddr, sizeof(target_type), 0))) { \ 266 __ret = __put_user((x), __hptr); \ 267 unlock_user(__hptr, __gaddr, sizeof(target_type)); \ 268 } else \ 269 __ret = -TARGET_EFAULT; \ 270 __ret; \ 271 }) 272 273 #define get_user(x, gaddr, target_type) \ 274 ({ \ 275 abi_ulong __gaddr = (gaddr); \ 276 target_type *__hptr; \ 277 abi_long __ret; \ 278 if ((__hptr = lock_user(VERIFY_READ, __gaddr, sizeof(target_type), 1))) { \ 279 __ret = __get_user((x), __hptr); \ 280 unlock_user(__hptr, __gaddr, 0); \ 281 } else { \ 282 /* avoid warning */ \ 283 (x) = 0; \ 284 __ret = -TARGET_EFAULT; \ 285 } \ 286 __ret; \ 287 }) 288 289 #define put_user_ual(x, gaddr) put_user((x), (gaddr), abi_ulong) 290 #define put_user_sal(x, gaddr) put_user((x), (gaddr), abi_long) 291 #define put_user_u64(x, gaddr) put_user((x), (gaddr), uint64_t) 292 #define put_user_s64(x, gaddr) put_user((x), (gaddr), int64_t) 293 #define put_user_u32(x, gaddr) put_user((x), (gaddr), uint32_t) 294 #define put_user_s32(x, gaddr) put_user((x), (gaddr), int32_t) 295 #define put_user_u16(x, gaddr) put_user((x), (gaddr), uint16_t) 296 #define put_user_s16(x, gaddr) put_user((x), (gaddr), int16_t) 297 #define put_user_u8(x, gaddr) put_user((x), (gaddr), uint8_t) 298 #define put_user_s8(x, gaddr) put_user((x), (gaddr), int8_t) 299 300 #define get_user_ual(x, gaddr) get_user((x), (gaddr), abi_ulong) 301 #define get_user_sal(x, gaddr) get_user((x), (gaddr), abi_long) 302 #define get_user_u64(x, gaddr) get_user((x), (gaddr), uint64_t) 303 #define get_user_s64(x, gaddr) get_user((x), (gaddr), int64_t) 304 #define get_user_u32(x, gaddr) get_user((x), (gaddr), uint32_t) 305 #define get_user_s32(x, gaddr) get_user((x), (gaddr), int32_t) 306 #define get_user_u16(x, gaddr) get_user((x), (gaddr), uint16_t) 307 #define get_user_s16(x, gaddr) get_user((x), (gaddr), int16_t) 308 #define get_user_u8(x, gaddr) get_user((x), (gaddr), uint8_t) 309 #define get_user_s8(x, gaddr) get_user((x), (gaddr), int8_t) 310 311 /* copy_from_user() and copy_to_user() are usually used to copy data 312 * buffers between the target and host. These internally perform 313 * locking/unlocking of the memory. 314 */ 315 abi_long copy_from_user(void *hptr, abi_ulong gaddr, size_t len); 316 abi_long copy_to_user(abi_ulong gaddr, void *hptr, size_t len); 317 318 /* Functions for accessing guest memory. The tget and tput functions 319 read/write single values, byteswapping as neccessary. The lock_user 320 gets a pointer to a contiguous area of guest memory, but does not perform 321 and byteswapping. lock_user may return either a pointer to the guest 322 memory, or a temporary buffer. */ 323 324 /* Lock an area of guest memory into the host. If copy is true then the 325 host area will have the same contents as the guest. */ 326 static inline void *lock_user(int type, abi_ulong guest_addr, long len, int copy) 327 { 328 if (!access_ok(type, guest_addr, len)) 329 return NULL; 330 #ifdef DEBUG_REMAP 331 { 332 void *addr; 333 addr = malloc(len); 334 if (copy) 335 memcpy(addr, g2h(guest_addr), len); 336 else 337 memset(addr, 0, len); 338 return addr; 339 } 340 #else 341 return g2h(guest_addr); 342 #endif 343 } 344 345 /* Unlock an area of guest memory. The first LEN bytes must be 346 flushed back to guest memory. host_ptr = NULL is explicitly 347 allowed and does nothing. */ 348 static inline void unlock_user(void *host_ptr, abi_ulong guest_addr, 349 long len) 350 { 351 352 #ifdef DEBUG_REMAP 353 if (!host_ptr) 354 return; 355 if (host_ptr == g2h(guest_addr)) 356 return; 357 if (len > 0) 358 memcpy(g2h(guest_addr), host_ptr, len); 359 free(host_ptr); 360 #endif 361 } 362 363 /* Return the length of a string in target memory or -TARGET_EFAULT if 364 access error. */ 365 abi_long target_strlen(abi_ulong gaddr); 366 367 /* Like lock_user but for null terminated strings. */ 368 static inline void *lock_user_string(abi_ulong guest_addr) 369 { 370 abi_long len; 371 len = target_strlen(guest_addr); 372 if (len < 0) 373 return NULL; 374 return lock_user(VERIFY_READ, guest_addr, (long)(len + 1), 1); 375 } 376 377 /* Helper macros for locking/ulocking a target struct. */ 378 #define lock_user_struct(type, host_ptr, guest_addr, copy) \ 379 (host_ptr = lock_user(type, guest_addr, sizeof(*host_ptr), copy)) 380 #define unlock_user_struct(host_ptr, guest_addr, copy) \ 381 unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0) 382 383 #if defined(USE_NPTL) 384 #include <pthread.h> 385 #endif 386 387 #endif /* QEMU_H */ 388