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 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 /* main.c */
 197 extern unsigned long x86_stack_size;
 198
 199 /* user access */
 200
 201 #define VERIFY_READ 0
 202 #define VERIFY_WRITE 1 /* implies read access */
 203
 204 static inline int access_ok(int type, abi_ulong addr, abi_ulong size)
 205 {
 206     return page_check_range((target_ulong)addr, size,
 207                             (type == VERIFY_READ) ? PAGE_READ : (PAGE_READ | PAGE_WRITE)) == 0;
 208 }
 209
 210 /* NOTE __get_user and __put_user use host pointers and don't check access. */
 211 /* These are usually used to access struct data members once the
 212  * struct has been locked - usually with lock_user_struct().
 213  */
 214 #define __put_user(x, hptr)\
 215 ({\
 216     int size = sizeof(*hptr);\
 217     switch(size) {\
 218     case 1:\
 219         *(uint8_t *)(hptr) = (uint8_t)(typeof(*hptr))(x);\
 220         break;\
 221     case 2:\
 222         *(uint16_t *)(hptr) = tswap16((typeof(*hptr))(x));\
 223         break;\
 224     case 4:\
 225         *(uint32_t *)(hptr) = tswap32((typeof(*hptr))(x));\
 226         break;\
 227     case 8:\
 228         *(uint64_t *)(hptr) = tswap64((typeof(*hptr))(x));\
 229         break;\
 230     default:\
 231         abort();\
 232     }\
 233     0;\
 234 })
 235
 236 #define __get_user(x, hptr) \
 237 ({\
 238     int size = sizeof(*hptr);\
 239     switch(size) {\
 240     case 1:\
 241         x = (typeof(*hptr))*(uint8_t *)(hptr);\
 242         break;\
 243     case 2:\
 244         x = (typeof(*hptr))tswap16(*(uint16_t *)(hptr));\
 245         break;\
 246     case 4:\
 247         x = (typeof(*hptr))tswap32(*(uint32_t *)(hptr));\
 248         break;\
 249     case 8:\
 250         x = (typeof(*hptr))tswap64(*(uint64_t *)(hptr));\
 251         break;\
 252     default:\
 253         /* avoid warning */\
 254         x = 0;\
 255         abort();\
 256     }\
 257     0;\
 258 })
 259
 260 /* put_user()/get_user() take a guest address and check access */
 261 /* These are usually used to access an atomic data type, such as an int,
 262  * that has been passed by address.  These internally perform locking
 263  * and unlocking on the data type.
 264  */
 265 #define put_user(x, gaddr, target_type)                                 \
 266 ({                                                                      \
 267     abi_ulong __gaddr = (gaddr);                                        \
 268     target_type *__hptr;                                                \
 269     abi_long __ret;                                                     \
 270     if ((__hptr = lock_user(VERIFY_WRITE, __gaddr, sizeof(target_type), 0))) { \
 271         __ret = __put_user((x), __hptr);                                \
 272         unlock_user(__hptr, __gaddr, sizeof(target_type));              \
 273     } else                                                              \
 274         __ret = -TARGET_EFAULT;                                         \
 275     __ret;                                                              \
 276 })
 277
 278 #define get_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_READ, __gaddr, sizeof(target_type), 1))) { \
 284         __ret = __get_user((x), __hptr);                                \
 285         unlock_user(__hptr, __gaddr, 0);                                \
 286     } else {                                                            \
 287         /* avoid warning */                                             \
 288         (x) = 0;                                                        \
 289         __ret = -TARGET_EFAULT;                                         \
 290     }                                                                   \
 291     __ret;                                                              \
 292 })
 293
 294 #define put_user_ual(x, gaddr) put_user((x), (gaddr), abi_ulong)
 295 #define put_user_sal(x, gaddr) put_user((x), (gaddr), abi_long)
 296 #define put_user_u64(x, gaddr) put_user((x), (gaddr), uint64_t)
 297 #define put_user_s64(x, gaddr) put_user((x), (gaddr), int64_t)
 298 #define put_user_u32(x, gaddr) put_user((x), (gaddr), uint32_t)
 299 #define put_user_s32(x, gaddr) put_user((x), (gaddr), int32_t)
 300 #define put_user_u16(x, gaddr) put_user((x), (gaddr), uint16_t)
 301 #define put_user_s16(x, gaddr) put_user((x), (gaddr), int16_t)
 302 #define put_user_u8(x, gaddr)  put_user((x), (gaddr), uint8_t)
 303 #define put_user_s8(x, gaddr)  put_user((x), (gaddr), int8_t)
 304
 305 #define get_user_ual(x, gaddr) get_user((x), (gaddr), abi_ulong)
 306 #define get_user_sal(x, gaddr) get_user((x), (gaddr), abi_long)
 307 #define get_user_u64(x, gaddr) get_user((x), (gaddr), uint64_t)
 308 #define get_user_s64(x, gaddr) get_user((x), (gaddr), int64_t)
 309 #define get_user_u32(x, gaddr) get_user((x), (gaddr), uint32_t)
 310 #define get_user_s32(x, gaddr) get_user((x), (gaddr), int32_t)
 311 #define get_user_u16(x, gaddr) get_user((x), (gaddr), uint16_t)
 312 #define get_user_s16(x, gaddr) get_user((x), (gaddr), int16_t)
 313 #define get_user_u8(x, gaddr)  get_user((x), (gaddr), uint8_t)
 314 #define get_user_s8(x, gaddr)  get_user((x), (gaddr), int8_t)
 315
 316 /* copy_from_user() and copy_to_user() are usually used to copy data
 317  * buffers between the target and host.  These internally perform
 318  * locking/unlocking of the memory.
 319  */
 320 abi_long copy_from_user(void *hptr, abi_ulong gaddr, size_t len);
 321 abi_long copy_to_user(abi_ulong gaddr, void *hptr, size_t len);
 322
 323 /* Functions for accessing guest memory.  The tget and tput functions
 324    read/write single values, byteswapping as neccessary.  The lock_user
 325    gets a pointer to a contiguous area of guest memory, but does not perform
 326    and byteswapping.  lock_user may return either a pointer to the guest
 327    memory, or a temporary buffer.  */
 328
 329 /* Lock an area of guest memory into the host.  If copy is true then the
 330    host area will have the same contents as the guest.  */
 331 static inline void *lock_user(int type, abi_ulong guest_addr, long len, int copy)
 332 {
 333     if (!access_ok(type, guest_addr, len))
 334         return NULL;
 335 #ifdef DEBUG_REMAP
 336     {
 337         void *addr;
 338         addr = malloc(len);
 339         if (copy)
 340             memcpy(addr, g2h(guest_addr), len);
 341         else
 342             memset(addr, 0, len);
 343         return addr;
 344     }
 345 #else
 346     return g2h(guest_addr);
 347 #endif
 348 }
 349
 350 /* Unlock an area of guest memory.  The first LEN bytes must be
 351    flushed back to guest memory. host_ptr = NULL is explicitly
 352    allowed and does nothing. */
 353 static inline void unlock_user(void *host_ptr, abi_ulong guest_addr,
 354                                long len)
 355 {
 356
 357 #ifdef DEBUG_REMAP
 358     if (!host_ptr)
 359         return;
 360     if (host_ptr == g2h(guest_addr))
 361         return;
 362     if (len > 0)
 363         memcpy(g2h(guest_addr), host_ptr, len);
 364     free(host_ptr);
 365 #endif
 366 }
 367
 368 /* Return the length of a string in target memory or -TARGET_EFAULT if
 369    access error. */
 370 abi_long target_strlen(abi_ulong gaddr);
 371
 372 /* Like lock_user but for null terminated strings.  */
 373 static inline void *lock_user_string(abi_ulong guest_addr)
 374 {
 375     abi_long len;
 376     len = target_strlen(guest_addr);
 377     if (len < 0)
 378         return NULL;
 379     return lock_user(VERIFY_READ, guest_addr, (long)(len + 1), 1);
 380 }
 381
 382 /* Helper macros for locking/ulocking a target struct.  */
 383 #define lock_user_struct(type, host_ptr, guest_addr, copy)      \
 384     (host_ptr = lock_user(type, guest_addr, sizeof(*host_ptr), copy))
 385 #define unlock_user_struct(host_ptr, guest_addr, copy)          \
 386     unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0)
 387
 388 #if defined(USE_NPTL)
 389 #include <pthread.h>
 390 #endif
 391
 392 #endif /* QEMU_H */