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 #endif
  66 #ifdef TARGET_I386
  67     struct target_vm86plus_struct *target_v86;
  68     struct vm86_saved_state vm86_saved_regs;
  69     struct target_vm86plus_struct vm86plus;
  70     uint32_t v86flags;
  71     uint32_t v86mask;
  72 #endif
  73     int used; /* non zero if used */
  74     uint8_t stack[0];
  75 } __attribute__((aligned(16))) TaskState;
  76
  77 extern TaskState *first_task_state;
  78
  79 int elf_exec(const char * filename, char ** argv, char ** envp,
  80              struct target_pt_regs * regs, struct image_info *infop);
  81
  82 void target_set_brk(char *new_brk);
  83 void syscall_init(void);
  84 long do_syscall(void *cpu_env, int num, long arg1, long arg2, long arg3,
  85                 long arg4, long arg5, long arg6);
  86 void gemu_log(const char *fmt, ...) __attribute__((format(printf,1,2)));
  87 extern CPUState *global_env;
  88 void cpu_loop(CPUState *env);
  89 void init_paths(const char *prefix);
  90 const char *path(const char *pathname);
  91
  92 extern int loglevel;
  93 extern FILE *logfile;
  94
  95 /* signal.c */
  96 void process_pending_signals(void *cpu_env);
  97 void signal_init(void);
  98 int queue_signal(int sig, target_siginfo_t *info);
  99 void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info);
 100 void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo);
 101 long do_sigreturn(CPUState *env);
 102 long do_rt_sigreturn(CPUState *env);
 103
 104 #ifdef TARGET_I386
 105 /* vm86.c */
 106 void save_v86_state(CPUX86State *env);
 107 void handle_vm86_trap(CPUX86State *env, int trapno);
 108 void handle_vm86_fault(CPUX86State *env);
 109 int do_vm86(CPUX86State *env, long subfunction,
 110             struct target_vm86plus_struct * target_v86);
 111 #endif
 112
 113 /* mmap.c */
 114 int target_mprotect(unsigned long start, unsigned long len, int prot);
 115 long target_mmap(unsigned long start, unsigned long len, int prot,
 116                  int flags, int fd, unsigned long offset);
 117 int target_munmap(unsigned long start, unsigned long len);
 118 long target_mremap(unsigned long old_addr, unsigned long old_size,
 119                    unsigned long new_size, unsigned long flags,
 120                    unsigned long new_addr);
 121 int target_msync(unsigned long start, unsigned long len, int flags);
 122
 123 /* user access */
 124
 125 #define VERIFY_READ 0
 126 #define VERIFY_WRITE 1
 127
 128 #define access_ok(type,addr,size) (1)
 129
 130 #define __put_user(x,ptr)\
 131 ({\
 132     int size = sizeof(*ptr);\
 133     switch(size) {\
 134     case 1:\
 135         stb(ptr, (typeof(*ptr))(x));\
 136         break;\
 137     case 2:\
 138         stw(ptr, (typeof(*ptr))(x));\
 139         break;\
 140     case 4:\
 141         stl(ptr, (typeof(*ptr))(x));\
 142         break;\
 143     case 8:\
 144         stq(ptr, (typeof(*ptr))(x));\
 145         break;\
 146     default:\
 147         abort();\
 148     }\
 149     0;\
 150 })
 151
 152 #define __get_user(x, ptr) \
 153 ({\
 154     int size = sizeof(*ptr);\
 155     switch(size) {\
 156     case 1:\
 157         x = (typeof(*ptr))ldub((void *)ptr);\
 158         break;\
 159     case 2:\
 160         x = (typeof(*ptr))lduw((void *)ptr);\
 161         break;\
 162     case 4:\
 163         x = (typeof(*ptr))ldl((void *)ptr);\
 164         break;\
 165     case 8:\
 166         x = (typeof(*ptr))ldq((void *)ptr);\
 167         break;\
 168     default:\
 169         abort();\
 170     }\
 171     0;\
 172 })
 173
 174 static inline unsigned long __copy_to_user(void *dst, const void *src,
 175                                            unsigned long size)
 176 {
 177     memcpy(dst, src, size);
 178     return 0;
 179 }
 180
 181 static inline unsigned long __copy_from_user(void *dst, const void *src,
 182                                              unsigned long size)
 183 {
 184     memcpy(dst, src, size);
 185     return 0;
 186 }
 187
 188 static inline unsigned long __clear_user(void *dst, unsigned long size)
 189 {
 190     memset(dst, 0, size);
 191     return 0;
 192 }
 193
 194 #define put_user(x,ptr)\
 195 ({\
 196     int __ret;\
 197     if (access_ok(VERIFY_WRITE, ptr, sizeof(*ptr)))\
 198         __ret = __put_user(x, ptr);\
 199     else\
 200         __ret = -EFAULT;\
 201     __ret;\
 202 })
 203
 204 #define get_user(x,ptr)\
 205 ({\
 206     int __ret;\
 207     if (access_ok(VERIFY_READ, ptr, sizeof(*ptr)))\
 208         __ret = __get_user(x, ptr);\
 209     else\
 210         __ret = -EFAULT;\
 211     __ret;\
 212 })
 213
 214 static inline unsigned long copy_to_user(void *dst, const void *src,
 215                                          unsigned long size)
 216 {
 217     if (access_ok(VERIFY_WRITE, dst, size))
 218         return __copy_to_user(dst, src, size);
 219     else
 220         return size;
 221 }
 222
 223 static inline unsigned long copy_from_user(void *dst, const void *src,
 224                                              unsigned long size)
 225 {
 226     if (access_ok(VERIFY_READ, src, size))
 227         return __copy_from_user(dst, src, size);
 228     else
 229         return size;
 230 }
 231
 232 static inline unsigned long clear_user(void *dst, unsigned long size)
 233 {
 234     if (access_ok(VERIFY_WRITE, dst, size))
 235         return __clear_user(dst, size);
 236     else
 237         return size;
 238 }
 239
 240 #endif /* QEMU_H */