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
  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 */