linux-user/qemu.h

   1 #ifndef QEMU_H
   2 #define QEMU_H
   3
   4 #include "thunk.h"
   5
   6 #include <signal.h>
   7 #include <string.h>
   8 #include "syscall_defs.h"
   9
  10 #include "cpu.h"
  11 #include "syscall.h"
  12 #include "gdbstub.h"
  13
  14 /* This struct is used to hold certain information about the image.
  15  * Basically, it replicates in user space what would be certain
  16  * task_struct fields in the kernel
  17  */
  18 struct image_info {
  19         unsigned long   start_code;
  20         unsigned long   end_code;
  21         unsigned long   end_data;
  22         unsigned long   start_brk;
  23         unsigned long   brk;
  24         unsigned long   start_mmap;
  25         unsigned long   mmap;
  26         unsigned long   rss;
  27         unsigned long   start_stack;
  28         unsigned long   arg_start;
  29         unsigned long   arg_end;
  30         unsigned long   env_start;
  31         unsigned long   env_end;
  32         unsigned long   entry;
  33         int             personality;
  34 };
  35
  36 #ifdef TARGET_I386
  37 /* Information about the current linux thread */
  38 struct vm86_saved_state {
  39     uint32_t eax; /* return code */
  40     uint32_t ebx;
  41     uint32_t ecx;
  42     uint32_t edx;
  43     uint32_t esi;
  44     uint32_t edi;
  45     uint32_t ebp;
  46     uint32_t esp;
  47     uint32_t eflags;
  48     uint32_t eip;
  49     uint16_t cs, ss, ds, es, fs, gs;
  50 };
  51 #endif
  52
  53 #ifdef TARGET_ARM
  54 /* FPU emulator */
  55 #include "nwfpe/fpa11.h"
  56 #endif
  57
  58 /* NOTE: we force a big alignment so that the stack stored after is
  59    aligned too */
  60 typedef struct TaskState {
  61     struct TaskState *next;
  62 #ifdef TARGET_ARM
  63     /* FPA state */
  64     FPA11 fpa;
  65     /* Extra fields for semihosted binaries.  */
  66     uint32_t stack_base;
  67     uint32_t heap_base;
  68     uint32_t heap_limit;
  69     int swi_errno;
  70 #endif
  71 #ifdef TARGET_I386
  72     target_ulong target_v86;
  73     struct vm86_saved_state vm86_saved_regs;
  74     struct target_vm86plus_struct vm86plus;
  75     uint32_t v86flags;
  76     uint32_t v86mask;
  77 #endif
  78     int used; /* non zero if used */
  79     uint8_t stack[0];
  80 } __attribute__((aligned(16))) TaskState;
  81
  82 extern TaskState *first_task_state;
  83
  84 int elf_exec(const char * filename, char ** argv, char ** envp,
  85              struct target_pt_regs * regs, struct image_info *infop);
  86
  87 void target_set_brk(target_ulong new_brk);
  88 long do_brk(target_ulong new_brk);
  89 void syscall_init(void);
  90 long do_syscall(void *cpu_env, int num, long arg1, long arg2, long arg3,
  91                 long arg4, long arg5, long arg6);
  92 void gemu_log(const char *fmt, ...) __attribute__((format(printf,1,2)));
  93 extern CPUState *global_env;
  94 void cpu_loop(CPUState *env);
  95 void init_paths(const char *prefix);
  96 const char *path(const char *pathname);
  97
  98 extern int loglevel;
  99 extern FILE *logfile;
 100
 101 /* signal.c */
 102 void process_pending_signals(void *cpu_env);
 103 void signal_init(void);
 104 int queue_signal(int sig, target_siginfo_t *info);
 105 void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info);
 106 void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo);
 107 long do_sigreturn(CPUState *env);
 108 long do_rt_sigreturn(CPUState *env);
 109
 110 #ifdef TARGET_I386
 111 /* vm86.c */
 112 void save_v86_state(CPUX86State *env);
 113 void handle_vm86_trap(CPUX86State *env, int trapno);
 114 void handle_vm86_fault(CPUX86State *env);
 115 int do_vm86(CPUX86State *env, long subfunction, target_ulong v86_addr);
 116 #endif
 117
 118 /* mmap.c */
 119 int target_mprotect(target_ulong start, target_ulong len, int prot);
 120 long target_mmap(target_ulong start, target_ulong len, int prot,
 121                  int flags, int fd, target_ulong offset);
 122 int target_munmap(target_ulong start, target_ulong len);
 123 long target_mremap(target_ulong old_addr, target_ulong old_size,
 124                    target_ulong new_size, unsigned long flags,
 125                    target_ulong new_addr);
 126 int target_msync(target_ulong start, target_ulong len, int flags);
 127
 128 /* user access */
 129
 130 #define VERIFY_READ 0
 131 #define VERIFY_WRITE 1
 132
 133 #define access_ok(type,addr,size) (1)
 134
 135 /* NOTE get_user and put_user use host addresses.  */
 136 #define __put_user(x,ptr)\
 137 ({\
 138     int size = sizeof(*ptr);\
 139     switch(size) {\
 140     case 1:\
 141         *(uint8_t *)(ptr) = (typeof(*ptr))(x);\
 142         break;\
 143     case 2:\
 144         *(uint16_t *)(ptr) = tswap16((typeof(*ptr))(x));\
 145         break;\
 146     case 4:\
 147         *(uint32_t *)(ptr) = tswap32((typeof(*ptr))(x));\
 148         break;\
 149     case 8:\
 150         *(uint64_t *)(ptr) = tswap64((typeof(*ptr))(x));\
 151         break;\
 152     default:\
 153         abort();\
 154     }\
 155     0;\
 156 })
 157
 158 #define __get_user(x, ptr) \
 159 ({\
 160     int size = sizeof(*ptr);\
 161     switch(size) {\
 162     case 1:\
 163         x = (typeof(*ptr))*(uint8_t *)(ptr);\
 164         break;\
 165     case 2:\
 166         x = (typeof(*ptr))tswap16(*(uint16_t *)(ptr));\
 167         break;\
 168     case 4:\
 169         x = (typeof(*ptr))tswap32(*(uint32_t *)(ptr));\
 170         break;\
 171     case 8:\
 172         x = (typeof(*ptr))tswap64(*(uint64_t *)(ptr));\
 173         break;\
 174     default:\
 175         abort();\
 176     }\
 177     0;\
 178 })
 179
 180 #define put_user(x,ptr)\
 181 ({\
 182     int __ret;\
 183     if (access_ok(VERIFY_WRITE, ptr, sizeof(*ptr)))\
 184         __ret = __put_user(x, ptr);\
 185     else\
 186         __ret = -EFAULT;\
 187     __ret;\
 188 })
 189
 190 #define get_user(x,ptr)\
 191 ({\
 192     int __ret;\
 193     if (access_ok(VERIFY_READ, ptr, sizeof(*ptr)))\
 194         __ret = __get_user(x, ptr);\
 195     else\
 196         __ret = -EFAULT;\
 197     __ret;\
 198 })
 199
 200 /* Functions for accessing guest memory.  The tget and tput functions
 201    read/write single values, byteswapping as neccessary.  The lock_user
 202    gets a pointer to a contiguous area of guest memory, but does not perform
 203    and byteswapping.  lock_user may return either a pointer to the guest
 204    memory, or a temporary buffer.  */
 205
 206 /* Lock an area of guest memory into the host.  If copy is true then the
 207    host area will have the same contents as the guest.  */
 208 static inline void *lock_user(target_ulong guest_addr, long len, int copy)
 209 {
 210 #ifdef DEBUG_REMAP
 211     void *addr;
 212     addr = malloc(len);
 213     if (copy)
 214         memcpy(addr, g2h(guest_addr), len);
 215     else
 216         memset(addr, 0, len);
 217     return addr;
 218 #else
 219     return g2h(guest_addr);
 220 #endif
 221 }
 222
 223 /* Unlock an area of guest memory.  The first LEN bytes must be flushed back
 224    to guest memory.  */
 225 static inline void unlock_user(void *host_addr, target_ulong guest_addr,
 226                                 long len)
 227 {
 228 #ifdef DEBUG_REMAP
 229     if (host_addr == g2h(guest_addr))
 230         return;
 231     if (len > 0)
 232         memcpy(g2h(guest_addr), host_addr, len);
 233     free(host_addr);
 234 #endif
 235 }
 236
 237 /* Return the length of a string in target memory.  */
 238 static inline int target_strlen(target_ulong ptr)
 239 {
 240   return strlen(g2h(ptr));
 241 }
 242
 243 /* Like lock_user but for null terminated strings.  */
 244 static inline void *lock_user_string(target_ulong guest_addr)
 245 {
 246     long len;
 247     len = target_strlen(guest_addr) + 1;
 248     return lock_user(guest_addr, len, 1);
 249 }
 250
 251 /* Helper macros for locking/ulocking a target struct.  */
 252 #define lock_user_struct(host_ptr, guest_addr, copy) \
 253     host_ptr = lock_user(guest_addr, sizeof(*host_ptr), copy)
 254 #define unlock_user_struct(host_ptr, guest_addr, copy) \
 255     unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0)
 256
 257 #define tget8(addr) ldub(addr)
 258 #define tput8(addr, val) stb(addr, val)
 259 #define tget16(addr) lduw(addr)
 260 #define tput16(addr, val) stw(addr, val)
 261 #define tget32(addr) ldl(addr)
 262 #define tput32(addr, val) stl(addr, val)
 263 #define tget64(addr) ldq(addr)
 264 #define tput64(addr, val) stq(addr, val)
 265 #if TARGET_LONG_BITS == 64
 266 #define tgetl(addr) ldq(addr)
 267 #define tputl(addr, val) stq(addr, val)
 268 #else
 269 #define tgetl(addr) ldl(addr)
 270 #define tputl(addr, val) stl(addr, val)
 271 #endif
 272
 273 #endif /* QEMU_H */