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 void cpu_list_lock(void); 190 void cpu_list_unlock(void); 191 #if defined(USE_NPTL) 192 void mmap_fork_start(void); 193 void mmap_fork_end(int child); 194 #endif 195 196 /* user access */ 197 198 #define VERIFY_READ 0 199 #define VERIFY_WRITE 1 /* implies read access */ 200 201 static inline int access_ok(int type, abi_ulong addr, abi_ulong size) 202 { 203 return page_check_range((target_ulong)addr, size, 204 (type == VERIFY_READ) ? PAGE_READ : (PAGE_READ | PAGE_WRITE)) == 0; 205 } 206 207 /* NOTE __get_user and __put_user use host pointers and don't check access. */ 208 /* These are usually used to access struct data members once the 209 * struct has been locked - usually with lock_user_struct(). 210 */ 211 #define __put_user(x, hptr)\ 212 ({\ 213 int size = sizeof(*hptr);\ 214 switch(size) {\ 215 case 1:\ 216 *(uint8_t *)(hptr) = (uint8_t)(typeof(*hptr))(x);\ 217 break;\ 218 case 2:\ 219 *(uint16_t *)(hptr) = tswap16((typeof(*hptr))(x));\ 220 break;\ 221 case 4:\ 222 *(uint32_t *)(hptr) = tswap32((typeof(*hptr))(x));\ 223 break;\ 224 case 8:\ 225 *(uint64_t *)(hptr) = tswap64((typeof(*hptr))(x));\ 226 break;\ 227 default:\ 228 abort();\ 229 }\ 230 0;\ 231 }) 232 233 #define __get_user(x, hptr) \ 234 ({\ 235 int size = sizeof(*hptr);\ 236 switch(size) {\ 237 case 1:\ 238 x = (typeof(*hptr))*(uint8_t *)(hptr);\ 239 break;\ 240 case 2:\ 241 x = (typeof(*hptr))tswap16(*(uint16_t *)(hptr));\ 242 break;\ 243 case 4:\ 244 x = (typeof(*hptr))tswap32(*(uint32_t *)(hptr));\ 245 break;\ 246 case 8:\ 247 x = (typeof(*hptr))tswap64(*(uint64_t *)(hptr));\ 248 break;\ 249 default:\ 250 /* avoid warning */\ 251 x = 0;\ 252 abort();\ 253 }\ 254 0;\ 255 }) 256 257 /* put_user()/get_user() take a guest address and check access */ 258 /* These are usually used to access an atomic data type, such as an int, 259 * that has been passed by address. These internally perform locking 260 * and unlocking on the data type. 261 */ 262 #define put_user(x, gaddr, target_type) \ 263 ({ \ 264 abi_ulong __gaddr = (gaddr); \ 265 target_type *__hptr; \ 266 abi_long __ret; \ 267 if ((__hptr = lock_user(VERIFY_WRITE, __gaddr, sizeof(target_type), 0))) { \ 268 __ret = __put_user((x), __hptr); \ 269 unlock_user(__hptr, __gaddr, sizeof(target_type)); \ 270 } else \ 271 __ret = -TARGET_EFAULT; \ 272 __ret; \ 273 }) 274 275 #define get_user(x, gaddr, target_type) \ 276 ({ \ 277 abi_ulong __gaddr = (gaddr); \ 278 target_type *__hptr; \ 279 abi_long __ret; \ 280 if ((__hptr = lock_user(VERIFY_READ, __gaddr, sizeof(target_type), 1))) { \ 281 __ret = __get_user((x), __hptr); \ 282 unlock_user(__hptr, __gaddr, 0); \ 283 } else { \ 284 /* avoid warning */ \ 285 (x) = 0; \ 286 __ret = -TARGET_EFAULT; \ 287 } \ 288 __ret; \ 289 }) 290 291 #define put_user_ual(x, gaddr) put_user((x), (gaddr), abi_ulong) 292 #define put_user_sal(x, gaddr) put_user((x), (gaddr), abi_long) 293 #define put_user_u64(x, gaddr) put_user((x), (gaddr), uint64_t) 294 #define put_user_s64(x, gaddr) put_user((x), (gaddr), int64_t) 295 #define put_user_u32(x, gaddr) put_user((x), (gaddr), uint32_t) 296 #define put_user_s32(x, gaddr) put_user((x), (gaddr), int32_t) 297 #define put_user_u16(x, gaddr) put_user((x), (gaddr), uint16_t) 298 #define put_user_s16(x, gaddr) put_user((x), (gaddr), int16_t) 299 #define put_user_u8(x, gaddr) put_user((x), (gaddr), uint8_t) 300 #define put_user_s8(x, gaddr) put_user((x), (gaddr), int8_t) 301 302 #define get_user_ual(x, gaddr) get_user((x), (gaddr), abi_ulong) 303 #define get_user_sal(x, gaddr) get_user((x), (gaddr), abi_long) 304 #define get_user_u64(x, gaddr) get_user((x), (gaddr), uint64_t) 305 #define get_user_s64(x, gaddr) get_user((x), (gaddr), int64_t) 306 #define get_user_u32(x, gaddr) get_user((x), (gaddr), uint32_t) 307 #define get_user_s32(x, gaddr) get_user((x), (gaddr), int32_t) 308 #define get_user_u16(x, gaddr) get_user((x), (gaddr), uint16_t) 309 #define get_user_s16(x, gaddr) get_user((x), (gaddr), int16_t) 310 #define get_user_u8(x, gaddr) get_user((x), (gaddr), uint8_t) 311 #define get_user_s8(x, gaddr) get_user((x), (gaddr), int8_t) 312 313 /* copy_from_user() and copy_to_user() are usually used to copy data 314 * buffers between the target and host. These internally perform 315 * locking/unlocking of the memory. 316 */ 317 abi_long copy_from_user(void *hptr, abi_ulong gaddr, size_t len); 318 abi_long copy_to_user(abi_ulong gaddr, void *hptr, size_t len); 319 320 /* Functions for accessing guest memory. The tget and tput functions 321 read/write single values, byteswapping as neccessary. The lock_user 322 gets a pointer to a contiguous area of guest memory, but does not perform 323 and byteswapping. lock_user may return either a pointer to the guest 324 memory, or a temporary buffer. */ 325 326 /* Lock an area of guest memory into the host. If copy is true then the 327 host area will have the same contents as the guest. */ 328 static inline void *lock_user(int type, abi_ulong guest_addr, long len, int copy) 329 { 330 if (!access_ok(type, guest_addr, len)) 331 return NULL; 332 #ifdef DEBUG_REMAP 333 { 334 void *addr; 335 addr = malloc(len); 336 if (copy) 337 memcpy(addr, g2h(guest_addr), len); 338 else 339 memset(addr, 0, len); 340 return addr; 341 } 342 #else 343 return g2h(guest_addr); 344 #endif 345 } 346 347 /* Unlock an area of guest memory. The first LEN bytes must be 348 flushed back to guest memory. host_ptr = NULL is explicitly 349 allowed and does nothing. */ 350 static inline void unlock_user(void *host_ptr, abi_ulong guest_addr, 351 long len) 352 { 353 354 #ifdef DEBUG_REMAP 355 if (!host_ptr) 356 return; 357 if (host_ptr == g2h(guest_addr)) 358 return; 359 if (len > 0) 360 memcpy(g2h(guest_addr), host_ptr, len); 361 free(host_ptr); 362 #endif 363 } 364 365 /* Return the length of a string in target memory or -TARGET_EFAULT if 366 access error. */ 367 abi_long target_strlen(abi_ulong gaddr); 368 369 /* Like lock_user but for null terminated strings. */ 370 static inline void *lock_user_string(abi_ulong guest_addr) 371 { 372 abi_long len; 373 len = target_strlen(guest_addr); 374 if (len < 0) 375 return NULL; 376 return lock_user(VERIFY_READ, guest_addr, (long)(len + 1), 1); 377 } 378 379 /* Helper macros for locking/ulocking a target struct. */ 380 #define lock_user_struct(type, host_ptr, guest_addr, copy) \ 381 (host_ptr = lock_user(type, guest_addr, sizeof(*host_ptr), copy)) 382 #define unlock_user_struct(host_ptr, guest_addr, copy) \ 383 unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0) 384 385 #if defined(USE_NPTL) 386 #include <pthread.h> 387 #endif 388 389 #endif /* QEMU_H */ 390