bsd-user/qemu.h

   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 #ifdef TARGET_ABI32
  15 typedef uint32_t abi_ulong;
  16 typedef int32_t abi_long;
  17 #define TARGET_ABI_FMT_lx "%08x"
  18 #define TARGET_ABI_FMT_ld "%d"
  19 #define TARGET_ABI_FMT_lu "%u"
  20 #define TARGET_ABI_BITS 32
  21 #else
  22 typedef target_ulong abi_ulong;
  23 typedef target_long abi_long;
  24 #define TARGET_ABI_FMT_lx TARGET_FMT_lx
  25 #define TARGET_ABI_FMT_ld TARGET_FMT_ld
  26 #define TARGET_ABI_FMT_lu TARGET_FMT_lu
  27 #define TARGET_ABI_BITS TARGET_LONG_BITS
  28 /* for consistency, define ABI32 too */
  29 #if TARGET_ABI_BITS == 32
  30 #define TARGET_ABI32 1
  31 #endif
  32 #endif
  33
  34 enum BSDType {
  35     target_freebsd,
  36     target_netbsd,
  37     target_openbsd,
  38 };
  39
  40 #include "syscall_defs.h"
  41 #include "syscall.h"
  42 #include "target_signal.h"
  43 #include "gdbstub.h"
  44
  45 #if defined(USE_NPTL)
  46 #define THREAD __thread
  47 #else
  48 #define THREAD
  49 #endif
  50
  51 /* This struct is used to hold certain information about the image.
  52  * Basically, it replicates in user space what would be certain
  53  * task_struct fields in the kernel
  54  */
  55 struct image_info {
  56     abi_ulong load_addr;
  57     abi_ulong start_code;
  58     abi_ulong end_code;
  59     abi_ulong start_data;
  60     abi_ulong end_data;
  61     abi_ulong start_brk;
  62     abi_ulong brk;
  63     abi_ulong start_mmap;
  64     abi_ulong mmap;
  65     abi_ulong rss;
  66     abi_ulong start_stack;
  67     abi_ulong entry;
  68     abi_ulong code_offset;
  69     abi_ulong data_offset;
  70     char      **host_argv;
  71     int       personality;
  72 };
  73
  74 #define MAX_SIGQUEUE_SIZE 1024
  75
  76 struct sigqueue {
  77     struct sigqueue *next;
  78     //target_siginfo_t info;
  79 };
  80
  81 struct emulated_sigtable {
  82     int pending; /* true if signal is pending */
  83     struct sigqueue *first;
  84     struct sigqueue info; /* in order to always have memory for the
  85                              first signal, we put it here */
  86 };
  87
  88 /* NOTE: we force a big alignment so that the stack stored after is
  89    aligned too */
  90 typedef struct TaskState {
  91     struct TaskState *next;
  92     int used; /* non zero if used */
  93     struct image_info *info;
  94
  95     struct emulated_sigtable sigtab[TARGET_NSIG];
  96     struct sigqueue sigqueue_table[MAX_SIGQUEUE_SIZE]; /* siginfo queue */
  97     struct sigqueue *first_free; /* first free siginfo queue entry */
  98     int signal_pending; /* non zero if a signal may be pending */
  99
 100     uint8_t stack[0];
 101 } __attribute__((aligned(16))) TaskState;
 102
 103 void init_task_state(TaskState *ts);
 104 extern const char *qemu_uname_release;
 105
 106 /* ??? See if we can avoid exposing so much of the loader internals.  */
 107 /*
 108  * MAX_ARG_PAGES defines the number of pages allocated for arguments
 109  * and envelope for the new program. 32 should suffice, this gives
 110  * a maximum env+arg of 128kB w/4KB pages!
 111  */
 112 #define MAX_ARG_PAGES 32
 113
 114 /*
 115  * This structure is used to hold the arguments that are
 116  * used when loading binaries.
 117  */
 118 struct linux_binprm {
 119         char buf[128];
 120         void *page[MAX_ARG_PAGES];
 121         abi_ulong p;
 122         int fd;
 123         int e_uid, e_gid;
 124         int argc, envc;
 125         char **argv;
 126         char **envp;
 127         char * filename;        /* Name of binary */
 128 };
 129
 130 void do_init_thread(struct target_pt_regs *regs, struct image_info *infop);
 131 abi_ulong loader_build_argptr(int envc, int argc, abi_ulong sp,
 132                               abi_ulong stringp, int push_ptr);
 133 int loader_exec(const char * filename, char ** argv, char ** envp,
 134              struct target_pt_regs * regs, struct image_info *infop);
 135
 136 int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
 137                     struct image_info * info);
 138 int load_flt_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
 139                     struct image_info * info);
 140
 141 abi_long memcpy_to_target(abi_ulong dest, const void *src,
 142                           unsigned long len);
 143 void target_set_brk(abi_ulong new_brk);
 144 abi_long do_brk(abi_ulong new_brk);
 145 void syscall_init(void);
 146 abi_long do_freebsd_syscall(void *cpu_env, int num, abi_long arg1,
 147                             abi_long arg2, abi_long arg3, abi_long arg4,
 148                             abi_long arg5, abi_long arg6);
 149 abi_long do_netbsd_syscall(void *cpu_env, int num, abi_long arg1,
 150                            abi_long arg2, abi_long arg3, abi_long arg4,
 151                            abi_long arg5, abi_long arg6);
 152 abi_long do_openbsd_syscall(void *cpu_env, int num, abi_long arg1,
 153                             abi_long arg2, abi_long arg3, abi_long arg4,
 154                             abi_long arg5, abi_long arg6);
 155 void gemu_log(const char *fmt, ...) __attribute__((format(printf,1,2)));
 156 extern THREAD CPUState *thread_env;
 157 void cpu_loop(CPUState *env, enum BSDType bsd_type);
 158 void init_paths(const char *prefix);
 159 const char *path(const char *pathname);
 160 char *target_strerror(int err);
 161 int get_osversion(void);
 162 void fork_start(void);
 163 void fork_end(int child);
 164
 165 #include "qemu-log.h"
 166
 167 /* strace.c */
 168 void
 169 print_freebsd_syscall(int num,
 170                       abi_long arg1, abi_long arg2, abi_long arg3,
 171                       abi_long arg4, abi_long arg5, abi_long arg6);
 172 void print_freebsd_syscall_ret(int num, abi_long ret);
 173 void
 174 print_netbsd_syscall(int num,
 175                      abi_long arg1, abi_long arg2, abi_long arg3,
 176                      abi_long arg4, abi_long arg5, abi_long arg6);
 177 void print_netbsd_syscall_ret(int num, abi_long ret);
 178 void
 179 print_openbsd_syscall(int num,
 180                       abi_long arg1, abi_long arg2, abi_long arg3,
 181                       abi_long arg4, abi_long arg5, abi_long arg6);
 182 void print_openbsd_syscall_ret(int num, abi_long ret);
 183 extern int do_strace;
 184
 185 /* signal.c */
 186 void process_pending_signals(CPUState *cpu_env);
 187 void signal_init(void);
 188 //int queue_signal(CPUState *env, int sig, target_siginfo_t *info);
 189 //void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info);
 190 //void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo);
 191 long do_sigreturn(CPUState *env);
 192 long do_rt_sigreturn(CPUState *env);
 193 abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp);
 194
 195 /* mmap.c */
 196 int target_mprotect(abi_ulong start, abi_ulong len, int prot);
 197 abi_long target_mmap(abi_ulong start, abi_ulong len, int prot,
 198                      int flags, int fd, abi_ulong offset);
 199 int target_munmap(abi_ulong start, abi_ulong len);
 200 abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size,
 201                        abi_ulong new_size, unsigned long flags,
 202                        abi_ulong new_addr);
 203 int target_msync(abi_ulong start, abi_ulong len, int flags);
 204 extern unsigned long last_brk;
 205 void mmap_lock(void);
 206 void mmap_unlock(void);
 207 #if defined(USE_NPTL)
 208 void mmap_fork_start(void);
 209 void mmap_fork_end(int child);
 210 #endif
 211
 212 /* user access */
 213
 214 #define VERIFY_READ 0
 215 #define VERIFY_WRITE 1 /* implies read access */
 216
 217 static inline int access_ok(int type, abi_ulong addr, abi_ulong size)
 218 {
 219     return page_check_range((target_ulong)addr, size,
 220                             (type == VERIFY_READ) ? PAGE_READ : (PAGE_READ | PAGE_WRITE)) == 0;
 221 }
 222
 223 /* NOTE __get_user and __put_user use host pointers and don't check access. */
 224 /* These are usually used to access struct data members once the
 225  * struct has been locked - usually with lock_user_struct().
 226  */
 227 #define __put_user(x, hptr)\
 228 ({\
 229     int size = sizeof(*hptr);\
 230     switch(size) {\
 231     case 1:\
 232         *(uint8_t *)(hptr) = (uint8_t)(typeof(*hptr))(x);\
 233         break;\
 234     case 2:\
 235         *(uint16_t *)(hptr) = tswap16((typeof(*hptr))(x));\
 236         break;\
 237     case 4:\
 238         *(uint32_t *)(hptr) = tswap32((typeof(*hptr))(x));\
 239         break;\
 240     case 8:\
 241         *(uint64_t *)(hptr) = tswap64((typeof(*hptr))(x));\
 242         break;\
 243     default:\
 244         abort();\
 245     }\
 246     0;\
 247 })
 248
 249 #define __get_user(x, hptr) \
 250 ({\
 251     int size = sizeof(*hptr);\
 252     switch(size) {\
 253     case 1:\
 254         x = (typeof(*hptr))*(uint8_t *)(hptr);\
 255         break;\
 256     case 2:\
 257         x = (typeof(*hptr))tswap16(*(uint16_t *)(hptr));\
 258         break;\
 259     case 4:\
 260         x = (typeof(*hptr))tswap32(*(uint32_t *)(hptr));\
 261         break;\
 262     case 8:\
 263         x = (typeof(*hptr))tswap64(*(uint64_t *)(hptr));\
 264         break;\
 265     default:\
 266         /* avoid warning */\
 267         x = 0;\
 268         abort();\
 269     }\
 270     0;\
 271 })
 272
 273 /* put_user()/get_user() take a guest address and check access */
 274 /* These are usually used to access an atomic data type, such as an int,
 275  * that has been passed by address.  These internally perform locking
 276  * and unlocking on the data type.
 277  */
 278 #define put_user(x, gaddr, target_type)                                 \
 279 ({                                                                      \
 280     abi_ulong __gaddr = (gaddr);                                        \
 281     target_type *__hptr;                                                \
 282     abi_long __ret;                                                     \
 283     if ((__hptr = lock_user(VERIFY_WRITE, __gaddr, sizeof(target_type), 0))) { \
 284         __ret = __put_user((x), __hptr);                                \
 285         unlock_user(__hptr, __gaddr, sizeof(target_type));              \
 286     } else                                                              \
 287         __ret = -TARGET_EFAULT;                                         \
 288     __ret;                                                              \
 289 })
 290
 291 #define get_user(x, gaddr, target_type)                                 \
 292 ({                                                                      \
 293     abi_ulong __gaddr = (gaddr);                                        \
 294     target_type *__hptr;                                                \
 295     abi_long __ret;                                                     \
 296     if ((__hptr = lock_user(VERIFY_READ, __gaddr, sizeof(target_type), 1))) { \
 297         __ret = __get_user((x), __hptr);                                \
 298         unlock_user(__hptr, __gaddr, 0);                                \
 299     } else {                                                            \
 300         /* avoid warning */                                             \
 301         (x) = 0;                                                        \
 302         __ret = -TARGET_EFAULT;                                         \
 303     }                                                                   \
 304     __ret;                                                              \
 305 })
 306
 307 #define put_user_ual(x, gaddr) put_user((x), (gaddr), abi_ulong)
 308 #define put_user_sal(x, gaddr) put_user((x), (gaddr), abi_long)
 309 #define put_user_u64(x, gaddr) put_user((x), (gaddr), uint64_t)
 310 #define put_user_s64(x, gaddr) put_user((x), (gaddr), int64_t)
 311 #define put_user_u32(x, gaddr) put_user((x), (gaddr), uint32_t)
 312 #define put_user_s32(x, gaddr) put_user((x), (gaddr), int32_t)
 313 #define put_user_u16(x, gaddr) put_user((x), (gaddr), uint16_t)
 314 #define put_user_s16(x, gaddr) put_user((x), (gaddr), int16_t)
 315 #define put_user_u8(x, gaddr)  put_user((x), (gaddr), uint8_t)
 316 #define put_user_s8(x, gaddr)  put_user((x), (gaddr), int8_t)
 317
 318 #define get_user_ual(x, gaddr) get_user((x), (gaddr), abi_ulong)
 319 #define get_user_sal(x, gaddr) get_user((x), (gaddr), abi_long)
 320 #define get_user_u64(x, gaddr) get_user((x), (gaddr), uint64_t)
 321 #define get_user_s64(x, gaddr) get_user((x), (gaddr), int64_t)
 322 #define get_user_u32(x, gaddr) get_user((x), (gaddr), uint32_t)
 323 #define get_user_s32(x, gaddr) get_user((x), (gaddr), int32_t)
 324 #define get_user_u16(x, gaddr) get_user((x), (gaddr), uint16_t)
 325 #define get_user_s16(x, gaddr) get_user((x), (gaddr), int16_t)
 326 #define get_user_u8(x, gaddr)  get_user((x), (gaddr), uint8_t)
 327 #define get_user_s8(x, gaddr)  get_user((x), (gaddr), int8_t)
 328
 329 /* copy_from_user() and copy_to_user() are usually used to copy data
 330  * buffers between the target and host.  These internally perform
 331  * locking/unlocking of the memory.
 332  */
 333 abi_long copy_from_user(void *hptr, abi_ulong gaddr, size_t len);
 334 abi_long copy_to_user(abi_ulong gaddr, void *hptr, size_t len);
 335
 336 /* Functions for accessing guest memory.  The tget and tput functions
 337    read/write single values, byteswapping as neccessary.  The lock_user
 338    gets a pointer to a contiguous area of guest memory, but does not perform
 339    and byteswapping.  lock_user may return either a pointer to the guest
 340    memory, or a temporary buffer.  */
 341
 342 /* Lock an area of guest memory into the host.  If copy is true then the
 343    host area will have the same contents as the guest.  */
 344 static inline void *lock_user(int type, abi_ulong guest_addr, long len, int copy)
 345 {
 346     if (!access_ok(type, guest_addr, len))
 347         return NULL;
 348 #ifdef DEBUG_REMAP
 349     {
 350         void *addr;
 351         addr = malloc(len);
 352         if (copy)
 353             memcpy(addr, g2h(guest_addr), len);
 354         else
 355             memset(addr, 0, len);
 356         return addr;
 357     }
 358 #else
 359     return g2h(guest_addr);
 360 #endif
 361 }
 362
 363 /* Unlock an area of guest memory.  The first LEN bytes must be
 364    flushed back to guest memory. host_ptr = NULL is explicitly
 365    allowed and does nothing. */
 366 static inline void unlock_user(void *host_ptr, abi_ulong guest_addr,
 367                                long len)
 368 {
 369
 370 #ifdef DEBUG_REMAP
 371     if (!host_ptr)
 372         return;
 373     if (host_ptr == g2h(guest_addr))
 374         return;
 375     if (len > 0)
 376         memcpy(g2h(guest_addr), host_ptr, len);
 377     free(host_ptr);
 378 #endif
 379 }
 380
 381 /* Return the length of a string in target memory or -TARGET_EFAULT if
 382    access error. */
 383 abi_long target_strlen(abi_ulong gaddr);
 384
 385 /* Like lock_user but for null terminated strings.  */
 386 static inline void *lock_user_string(abi_ulong guest_addr)
 387 {
 388     abi_long len;
 389     len = target_strlen(guest_addr);
 390     if (len < 0)
 391         return NULL;
 392     return lock_user(VERIFY_READ, guest_addr, (long)(len + 1), 1);
 393 }
 394
 395 /* Helper macros for locking/ulocking a target struct.  */
 396 #define lock_user_struct(type, host_ptr, guest_addr, copy)      \
 397     (host_ptr = lock_user(type, guest_addr, sizeof(*host_ptr), copy))
 398 #define unlock_user_struct(host_ptr, guest_addr, copy)          \
 399     unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0)
 400
 401 #if defined(USE_NPTL)
 402 #include <pthread.h>
 403 #endif
 404
 405 #endif /* QEMU_H */