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